Prospectus - Investment Objective
Fund/Ticker
Fidelity Corporate Bond ETF/FCOR
Fidelity Investment Grade Bond ETF/FIGB
Fidelity Investment Grade Securitized ETF/FSEC
Fidelity Limited Term Bond ETF/FLTB
Fidelity Total Bond ETF/FBND
Principal U.S. Listing Exchange: NYSE Arca, Inc.
 
Prospectus
December 30, 2023
 
 
These securities have not been approved or disapproved by the Securities and Exchange Commission, and the Securities and Exchange Commission has not determined if this prospectus is accurate or complete. Any representation to the contrary is a criminal offense.
 
245 Summer Street, Boston, MA 02210

Contents

Fund Summary

Fidelity® Corporate Bond ETF
Fidelity® Investment Grade Bond ETF
Fidelity® Investment Grade Securitized ETF
Fidelity® Limited Term Bond ETF
Fidelity® Total Bond ETF

Fund Basics

Investment Details

Valuing Shares

Shareholder Information

Additional Information about the Purchase and Sale of Shares

Dividends and Capital Gain Distributions

Tax Consequences

Fund Services

Fund Management

Fund Distribution

Other Service Providers

Appendix

Financial Highlights

Additional Index Information

 
Fund Summary
Fund:
Fidelity® Corporate Bond ETF
Investment Objective
Fidelity® Corporate Bond ETF seeks a high level of current income.
Fee Table
The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table or example below.
 
Shareholder fees
(fees paid directly from your investment)
None
Annual Operating Expenses
(expenses that you pay each year as a % of the value of your investment)
Management fee
0.36%   
Distribution and/or Service (12b-1) fees
None   
Other expenses
0.00%   
Total annual operating expenses
0.36%   
This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:
 
 
1 year
$
37
3 years
$
116
5 years
$
202
10 years
$
456
 
 
 
Portfolio Turnover
 
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 28% of the average value of its portfolio.
Principal Investment Strategies
  • Normally investing at least 80% of assets in corporate bonds and other corporate debt securities and repurchase agreements for those securities.
  • Normally investing primarily in investment-grade corporate debt securities and repurchase agreements for those securities.
  • Managing the fund to have similar overall interest rate risk to the Bloomberg U.S. Credit Bond Index.
  • Investing in domestic and foreign issuers.
  • Analyzing the credit quality of the issuer, security-specific features, current and potential future valuation, and trading opportunities to select investments.
  • Investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).
  • Engaging in transactions that have a leveraging effect on the fund, including investments in derivatives - such as swaps (interest rate, total return, and credit default), options, and futures contracts - and forward-settling securities, to adjust the fund's risk exposure.
Principal Investment Risks
  • Interest Rate Changes.
Interest rate increases can cause the price of a debt security to decrease.
  • Foreign Exposure.
Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.
  • Prepayment.
The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.
  • Issuer-Specific Changes.
The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole.
A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease.
Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.
  • Fluctuation of Net Asset Value and Share Price.
The net asset value per share (NAV) of the fund will generally fluctuate with changes in the market value of the fund's holdings. The fund's shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund's shares may result in the fund's shares trading significantly above (at a premium) or below (at a discount) to NAV.
Given the nature of the relevant markets for certain of the fund's securities, shares may trade at a larger premium or discount to the NAV than shares of other ETFs.
In addition, in stressed market conditions or periods of market disruption or volatility, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings.
  • Trading Issues.
There can be no assurance that an active trading market will be maintained. Market makers and Authorized Participants are not obligated to make a market in the fund's shares or to submit purchase and redemption orders for creation units. In addition, trading may be halted, for example, due to market conditions.
  • Leverage Risk.
Leverage can increase market exposure, magnify investment risks, and cause losses to be realized more quickly.
  • Cash Transactions Risk.
Unlike certain ETFs, the fund may effect some or all creations and redemptions using cash, rather than in-kind securities. As a result, an investment in the fund may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.
An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.
Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in the fund will fluctuate.
Performance
The following information is intended to help you understand the risks of investing in the fund.
The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index over various periods of time. The index description appears in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.
Visit www.fidelity.com for more recent performance information.
 
Year-by-Year Returns
 
 
 
 
2015
2016
2017
2018
2019
2020
2021
2022
 
-2.25%
 
7.54%
 
5.99%
 
-2.92%
 
14.96%
 
10.86%
 
-1.00%
 
-16.30%
 
During the periods shown in the chart:
Returns
Quarter ended
   Highest Quarter Return
10.71%
June 30, 2020
   Lowest Quarter Return
-7.83%
June 30, 2022
   Year-to-Date Return
0.60%
September 30, 2023
 
Average Annual Returns
 
After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.
 
 
For the periods ended December 31, 2022
Past 1
year
Past 5
years
Life of
fund A
Fidelity® Corporate Bond ETF
 
 
 
Return Before Taxes 
-16.30%
0.50%
1.73%
Return After Taxes on Distributions 
-17.37%
-0.74%
0.43%
Return After Taxes on Distributions and Sale of Fund Shares 
 
-9.63%
-0.10%
0.78%
Bloomberg U.S. Credit Bond Index
(reflects no deduction for fees, expenses, or taxes)
 
-15.26%
 
0.42%
 
1.68%
 
 
 
 
AFrom October 6, 2014.
 
 
Investment Adviser
Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. Other investment advisers serve as sub-advisers for the fund.
Portfolio Manager(s)
Matthew Bartlett (Co-Portfolio Manager) has managed the fund since 2016.
Ben Tarlow (Co-Portfolio Manager) has managed the fund since 2019.
Jay Small (Co-Portfolio Manager) has managed the fund since 2020.
Purchase and Sale of Shares
Shares of the fund are listed and traded on an exchange, and individual fund shares may only be bought and sold in the secondary market through a broker or dealer at market price. These transactions, which do not involve the fund, are made at market prices that may vary throughout the day, rather than at NAV. Shares of the fund may trade at a price greater than the fund's NAV (premium) or less than the fund's NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling fund shares in the secondary market (the "bid-ask spread"). Recent information, including information regarding the fund's NAV, market price, premiums and discounts, and bid-ask spread, is available at www.fidelity.com.
Tax Information
Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary's web site for more information.
 
Fund Summary
Fund:
Fidelity® Investment Grade Bond ETF
 
Investment Objective
 
Fidelity® Investment Grade Bond ETF seeks a high level of current income.
Fee Table
The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table or example below.
 
 
Shareholder fees
(fees paid directly from your investment)
None
 
Annual Operating Expenses
(expenses that you pay each year as a % of the value of your investment)
Management fee
0.36%   
Distribution and/or Service (12b-1) fees
None   
Other expenses
0.00%   
Total annual operating expenses
0.36%   
This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:
 
 
1 year
$
37
3 years
$
116
5 years
$
202
10 years
$
456
 
 
 
Portfolio Turnover
 
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 190% of the average value of its portfolio.
Principal Investment Strategies
  • Normally investing at least 80% of assets in investment-grade debt securities (those of medium and high quality) of all types and repurchase agreements for those securities.
  • Managing the fund to have similar overall interest rate risk to the Bloomberg U.S. Aggregate Bond Index.
  • Allocating assets across different market sectors and maturities.
  • Investing in domestic and foreign issuers.
  • Analyzing the credit quality of the issuer, security-specific features, current and potential future valuation, and trading opportunities to select investments.
  • Investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).
  • Engaging in transactions that have a leveraging effect on the fund, including investments in derivatives - such as swaps (interest rate, total return, and credit default), options, and futures contracts - and forward-settling securities, to adjust the fund's risk exposure.
Principal Investment Risks
  • Interest Rate Changes.
Interest rate increases can cause the price of a debt security to decrease.
  • Foreign Exposure.
Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.
  • Prepayment.
The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.
  • Issuer-Specific Changes.
The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole.
A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease.
Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.
  • Fluctuation of Net Asset Value and Share Price.
The net asset value per share (NAV) of the fund will generally fluctuate with changes in the market value of the fund's holdings. The fund's shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund's shares may result in the fund's shares trading significantly above (at a premium) or below (at a discount) to NAV.
Given the nature of the relevant markets for certain of the fund's securities, shares may trade at a larger premium or discount to the NAV than shares of other ETFs.
In addition, in stressed market conditions or periods of market disruption or volatility, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings.
  • Trading Issues.
There can be no assurance that an active trading market will be maintained. Market makers and Authorized Participants are not obligated to make a market in the fund's shares or to submit purchase and redemption orders for creation units. In addition, trading may be halted, for example, due to market conditions.
  • Leverage Risk.
Leverage can increase market exposure, magnify investment risks, and cause losses to be realized more quickly.
  • Cash Transactions Risk.
Unlike certain ETFs, the fund may effect some or all creations and redemptions using cash, rather than in-kind securities. As a result, an investment in the fund may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.
  • High Portfolio Turnover.
High portfolio turnover (more than 100%) may result in increased transaction costs and potentially higher capital gains or losses. The effects of higher than normal portfolio turnover may adversely affect the fund's performance.
An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.
Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in the fund will fluctuate.
Performance
The following information is intended to help you understand the risks of investing in the fund.
The information illustrates the performance of the fund's shares over the past year and compares the performance of the fund's shares to the performance of a securities market index over various periods of time. The index description appears in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.
Visit www.fidelity.com for more recent performance information.
 
Year-by-Year Returns
 
 
 
 
 
 
 
 
 
 
 
2022
 
-13.60%
 
During the periods shown in the chart:
Returns
Quarter ended
   Highest Quarter Return
1.69%
December 31, 2022
   Lowest Quarter Return
-5.87%
March 31, 2022
   Year-to-Date Return
-0.51%
September 30, 2023
 
Average Annual Returns
 
After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.
 
 
For the periods ended December 31, 2022
Past 1
year
Life of
fund A
Fidelity® Investment Grade Bond ETF
 
 
Return Before Taxes 
-13.60%
-6.95%
Return After Taxes on Distributions 
-14.42%
-7.66%
Return After Taxes on Distributions and Sale of Fund Shares 
 
-8.04%
-5.53%
Bloomberg U.S. Aggregate Bond Index
(reflects no deduction for fees, expenses, or taxes)
 
-13.01%
 
-6.97%
 
 
 
AFrom March 2, 2021.
 
 
Investment Adviser
Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. Other investment advisers serve as sub-advisers for the fund.
Portfolio Manager(s)
Jeff Moore (Co-Portfolio Manager) has managed the fund since 2021.
Michael Plage (Co-Portfolio Manager) has managed the fund since 2021.
Purchase and Sale of Shares
Shares of the fund are listed and traded on an exchange, and individual fund shares may only be bought and sold in the secondary market through a broker or dealer at market price. These transactions, which do not involve the fund, are made at market prices that may vary throughout the day, rather than at NAV. Shares of the fund may trade at a price greater than the fund's NAV (premium) or less than the fund's NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling fund shares in the secondary market (the "bid-ask spread"). Recent information, including information regarding the fund's NAV, market price, premiums and discounts, and bid-ask spread, is available at www.fidelity.com.
Tax Information
Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary's web site for more information.
 
Fund Summary
Fund:
Fidelity® Investment Grade Securitized ETF
 
Investment Objective
 
Fidelity® Investment Grade Securitized ETF seeks a high level of current income.
Fee Table
The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table or example below.
 
 
Shareholder fees
(fees paid directly from your investment)
None
 
Annual Operating Expenses
(expenses that you pay each year as a % of the value of your investment)
Management fee
0.36%   
Distribution and/or Service (12b-1) fees
None   
Other expenses
0.01%   
Total annual operating expenses
0.37%   
Fee waiver and/or expense reimbursement
0.01%   A
Total annual operating expenses after fee waiver and/or expense reimbursement
0.36%   
AFidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse the fund to the extent proxy and shareholder meeting expenses exceed 0.003% of the fund's average net assets. This arrangement will remain in effect through December 31, 2024. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees and may extend it in its discretion after that date.
This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:
 
 
1 year
$
37
3 years
$
118
5 years
$
206
10 years
$
467
 
 
 
Portfolio Turnover
 
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 865% of the average value of its portfolio.
Principal Investment Strategies
  • Normally investing at least 80% of assets in investment-grade securitized debt securities (those of medium and high quality) and repurchase agreements for those securities.
  • Investing in securitized debt securities (including mortgage-backed securities, commercial mortgage-backed securities, and other asset-backed securities) issued by the U.S. Government and its agencies or instrumentalities, foreign governments, and corporations.
  • Investing in U.S. Government securities issued by entities that are chartered or sponsored by Congress but whose securities are neither issued nor guaranteed by the U.S. Treasury.
  • Managing the fund to have similar overall interest rate risk to the Bloomberg U.S. Securitized Index.
  • Allocating assets across different market sectors and maturities.
  • Investing in domestic and foreign issuers.
  • Analyzing the credit quality of the issuer, security-specific features, current and potential future valuation, and trading opportunities to select investments.
  • Investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).
  • Engaging in transactions that have a leveraging effect on the fund, including investments in derivatives - such as swaps (interest rate, total return, and credit default), options, and futures contracts - and forward-settling securities, to adjust the fund's risk exposure.
Principal Investment Risks
  • Interest Rate Changes.
Interest rate increases can cause the price of a debt security to decrease.
  • Foreign Exposure.
Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.
  • Securitized Debt Securities Exposure.
Securitized debt securities are dependent on the cash flows generated by the underlying assets and can be significantly affected by changes in interest rates, the availability of information concerning the underlying assets and their structure, and the creditworthiness of the originators of the loans or other receivables or the entities providing credit support.
  • Prepayment.
The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.
  • Issuer-Specific Changes.
The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole.
A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease.
Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.
  • Fluctuation of Net Asset Value and Share Price.
The net asset value per share (NAV) of the fund will generally fluctuate with changes in the market value of the fund's holdings. The fund's shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund's shares may result in the fund's shares trading significantly above (at a premium) or below (at a discount) to NAV.
Given the nature of the relevant markets for certain of the fund's securities, shares may trade at a larger premium or discount to the NAV than shares of other ETFs.
In addition, in stressed market conditions or periods of market disruption or volatility, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings.
  • Trading Issues.
There can be no assurance that an active trading market will be maintained. Market makers and Authorized Participants are not obligated to make a market in the fund's shares or to submit purchase and redemption orders for creation units. In addition, trading may be halted, for example, due to market conditions.
  • Leverage Risk.
Leverage can increase market exposure, magnify investment risks, and cause losses to be realized more quickly.
  • Cash Transactions Risk.
Unlike certain ETFs, the fund may effect some or all creations and redemptions using cash, rather than in-kind securities. As a result, an investment in the fund may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.
  • High Portfolio Turnover.
High portfolio turnover (more than 100%) may result in increased transaction costs and potentially higher capital gains or losses. The effects of higher than normal portfolio turnover may adversely affect the fund's performance.
An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.
Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in the fund will fluctuate.
Performance
The following information is intended to help you understand the risks of investing in the fund.
The information illustrates the performance of the fund's shares over the past year and compares the performance of the fund's shares to the performance of a securities market index over various periods of time. The index description appears in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.
Visit www.fidelity.com for more recent performance information.
 
Year-by-Year Returns
 
 
 
 
 
 
 
 
 
 
 
2022
 
-12.57%
 
During the periods shown in the chart:
Returns
Quarter ended
   Highest Quarter Return
1.97%
December 31, 2022
   Lowest Quarter Return
-5.34%
September 30, 2022
   Year-to-Date Return
-1.94%
September 30, 2023
 
Average Annual Returns
 
After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.
 
 
For the periods ended December 31, 2022
Past 1
year
Life of
fund A
Fidelity® Investment Grade Securitized ETF
 
 
Return Before Taxes 
-12.57%
-7.31%
Return After Taxes on Distributions 
-12.99%
-7.69%
Return After Taxes on Distributions and Sale of Fund Shares 
 
-7.44%
-5.67%
Bloomberg U.S. Securitized Index
(reflects no deduction for fees, expenses, or taxes)
 
-11.67%
 
-6.86%
 
 
 
AFrom March 2, 2021.
 
 
Investment Adviser
Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. Other investment advisers serve as sub-advisers for the fund.
Portfolio Manager(s)
Franco Castagliuolo (Co-Portfolio Manager) has managed the fund since 2021.
Sean Corcoran (Co-Portfolio Manager) has managed the fund since 2021.
Purchase and Sale of Shares
Shares of the fund are listed and traded on an exchange, and individual fund shares may only be bought and sold in the secondary market through a broker or dealer at market price. These transactions, which do not involve the fund, are made at market prices that may vary throughout the day, rather than at NAV. Shares of the fund may trade at a price greater than the fund's NAV (premium) or less than the fund's NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling fund shares in the secondary market (the "bid-ask spread"). Recent information, including information regarding the fund's NAV, market price, premiums and discounts, and bid-ask spread, is available at www.fidelity.com.
Tax Information
Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary's web site for more information.
 
Fund Summary
Fund:
Fidelity® Limited Term Bond ETF
 
Investment Objective
 
Fidelity® Limited Term Bond ETF seeks to provide a high rate of income.
Fee Table
The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table or example below.
 
 
Shareholder fees
(fees paid directly from your investment)
None
 
Annual Operating Expenses
(expenses that you pay each year as a % of the value of your investment)
Management fee
0.25%   A
Distribution and/or Service (12b-1) fees
None   
Other expenses
0.00%   
Total annual operating expenses
0.25%   
AAdjusted to reflect current fees.
This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:
 
 
1 year
$
26
3 years
$
80
5 years
$
141
10 years
$
318
 
 
 
Portfolio Turnover
 
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 59% of the average value of its portfolio.
Principal Investment Strategies
  • Normally investing at least 80% of assets in investment-grade debt securities (those of medium and high quality) of all types and repurchase agreements for those securities.
  • Managing the fund to have similar overall interest rate risk to the Fidelity Limited Term Composite Index℠.
  • Normally maintaining a dollar-weighted average maturity between two and five years.
  • Allocating assets across different market sectors and maturities.
  • Investing in domestic and foreign issuers.
  • Analyzing the credit quality of the issuer, security-specific features, current and potential future valuation, and trading opportunities to select investments.
  • Potentially investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).
  • Engaging in transactions that have a leveraging effect on the fund, including investments in derivatives - such as swaps (interest rate, total return, and credit default), options, and futures contracts - and forward-settling securities, to adjust the fund's risk exposure.
Principal Investment Risks
  • Interest Rate Changes.
Interest rate increases can cause the price of a debt security to decrease.
  • Foreign Exposure.
Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.
  • Prepayment.
The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.
  • Issuer-Specific Changes.
The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole.
A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease.
Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.
  • Fluctuation of Net Asset Value and Share Price.
The net asset value per share (NAV) of the fund will generally fluctuate with changes in the market value of the fund's holdings. The fund's shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund's shares may result in the fund's shares trading significantly above (at a premium) or below (at a discount) to NAV.
Given the nature of the relevant markets for certain of the fund's securities, shares may trade at a larger premium or discount to the NAV than shares of other ETFs.
In addition, in stressed market conditions or periods of market disruption or volatility, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings.
  • Trading Issues.
There can be no assurance that an active trading market will be maintained. Market makers and Authorized Participants are not obligated to make a market in the fund's shares or to submit purchase and redemption orders for creation units. In addition, trading may be halted, for example, due to market conditions.
  • Leverage Risk.
Leverage can increase market exposure, magnify investment risks, and cause losses to be realized more quickly.
  • Cash Transactions Risk.
Unlike certain ETFs, the fund may effect some or all creations and redemptions using cash, rather than in-kind securities. As a result, an investment in the fund may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.
An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.
Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in the fund will fluctuate.
Performance
The following information is intended to help you understand the risks of investing in the fund.
The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.
Visit www.fidelity.com for more recent performance information.
 
Year-by-Year Returns
 
 
 
 
2015
2016
2017
2018
2019
2020
2021
2022
 
1.26%
 
2.30%
 
1.85%
 
0.88%
 
6.13%
 
5.31%
 
-1.07%
 
-5.92%
 
During the periods shown in the chart:
Returns
Quarter ended
   Highest Quarter Return
5.01%
June 30, 2020
   Lowest Quarter Return
-3.67%
March 31, 2022
   Year-to-Date Return
2.13%
September 30, 2023
 
Average Annual Returns
 
After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.
 
 
For the periods ended December 31, 2022
Past 1
year
Past 5
years
Life of
fund A
Fidelity® Limited Term Bond ETF
 
 
 
Return Before Taxes 
-5.92%
0.97%
1.24%
Return After Taxes on Distributions 
-6.54%
0.21%
0.50%
Return After Taxes on Distributions and Sale of Fund Shares 
 
-3.50%
0.43%
0.63%
Bloomberg U.S. 1-5 Year Government/Credit Bond Index
(reflects no deduction for fees, expenses, or taxes)
 
-5.50%
 
0.85%
 
1.00%
Fidelity Limited Term Composite Index℠
(reflects no deduction for fees, expenses, or taxes)
 
-5.54%
 
1.14%
 
1.35%
 
 
 
 
AFrom October 6, 2014.
 
 
Investment Adviser
Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. Other investment advisers serve as sub-advisers for the fund.
Portfolio Manager(s)
Rob Galusza (Co-Portfolio Manager) has managed the fund since 2014.
David DeBiase (Co-Portfolio Manager) has managed the fund since 2018.
Julian Potenza (Co-Portfolio Manager) has managed the fund since 2020.
Purchase and Sale of Shares
Shares of the fund are listed and traded on an exchange, and individual fund shares may only be bought and sold in the secondary market through a broker or dealer at market price. These transactions, which do not involve the fund, are made at market prices that may vary throughout the day, rather than at NAV. Shares of the fund may trade at a price greater than the fund's NAV (premium) or less than the fund's NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling fund shares in the secondary market (the "bid-ask spread"). Recent information, including information regarding the fund's NAV, market price, premiums and discounts, and bid-ask spread, is available at www.fidelity.com.
Tax Information
Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary's web site for more information.
 
Fund Summary
Fund:
Fidelity® Total Bond ETF
 
Investment Objective
 
Fidelity® Total Bond ETF seeks a high level of current income.
Fee Table
The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table or example below.
 
 
Shareholder fees
(fees paid directly from your investment)
None
 
Annual Operating Expenses
(expenses that you pay each year as a % of the value of your investment)
Management fee
0.36%   
Distribution and/or Service (12b-1) fees
None   
Other expenses
0.00%   
Total annual operating expenses
0.36%   
This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:
 
 
1 year
$
37
3 years
$
116
5 years
$
202
10 years
$
456
 
 
 
Portfolio Turnover
 
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 233% of the average value of its portfolio.
Principal Investment Strategies
  • Normally investing at least 80% of assets in debt securities of all types and repurchase agreements for those securities.
  • Using the Bloomberg U.S. Universal Bond Index as a guide in allocating assets across the investment-grade, high yield, and emerging markets asset classes. Emerging markets include countries that have an emerging stock market as defined by MSCI, countries or markets with low- to middle-income economies as classified by the World Bank, and other countries or markets that the Adviser identifies as having similar emerging markets characteristics.
  • Investing up to 20% of assets in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).
  • Managing the fund to have similar overall interest rate risk to the index.
  • Investing in domestic and foreign issuers.
  • Allocating assets across different asset classes, market sectors, and maturities.
  • Analyzing the credit quality of the issuer, the issuer's potential for success, the credit, currency, and economic risks of the security and its issuer, security-specific features, current and potential future valuation, and trading opportunities to select investments.
  • Engaging in transactions that have a leveraging effect on the fund, including investments in derivatives - such as swaps (interest rate, total return, and credit default), options, and futures contracts - and forward-settling securities, to adjust the fund's risk exposure.
Principal Investment Risks
  • Interest Rate Changes.
Interest rate increases can cause the price of a debt security to decrease.
  • Foreign Exposure.
Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.
Foreign exchange rates also can be extremely volatile.
  • Prepayment.
The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.
  • Issuer-Specific Changes.
The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole.
A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease.
Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer.
The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell.
  • Fluctuation of Net Asset Value and Share Price.
The net asset value per share (NAV) of the fund will generally fluctuate with changes in the market value of the fund's holdings. The fund's shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund's shares may result in the fund's shares trading significantly above (at a premium) or below (at a discount) to NAV.
Given the nature of the relevant markets for certain of the fund's securities, shares may trade at a larger premium or discount to the NAV than shares of other ETFs.
In addition, in stressed market conditions or periods of market disruption or volatility, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings.
  • Trading Issues.
There can be no assurance that an active trading market will be maintained. Market makers and Authorized Participants are not obligated to make a market in the fund's shares or to submit purchase and redemption orders for creation units. In addition, trading may be halted, for example, due to market conditions.
  • Leverage Risk.
Leverage can increase market exposure, magnify investment risks, and cause losses to be realized more quickly.
  • Cash Transactions Risk.
Unlike certain ETFs, the fund may effect some or all creations and redemptions using cash, rather than in-kind securities. As a result, an investment in the fund may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.
  • High Portfolio Turnover.
High portfolio turnover (more than 100%) may result in increased transaction costs and potentially higher capital gains or losses. The effects of higher than normal portfolio turnover may adversely affect the fund's performance.
An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.
Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in the fund will fluctuate.
Performance
The following information is intended to help you understand the risks of investing in the fund.
The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.
Visit www.fidelity.com for more recent performance information.
 
Year-by-Year Returns
 
 
 
 
2015
2016
2017
2018
2019
2020
2021
2022
 
-1.44%
 
6.65%
 
4.07%
 
-0.67%
 
9.90%
 
9.51%
 
-0.35%
 
-12.73%
 
During the periods shown in the chart:
Returns
Quarter ended
   Highest Quarter Return
5.62%
June 30, 2020
   Lowest Quarter Return
-5.97%
June 30, 2022
   Year-to-Date Return
-0.01%
September 30, 2023
 
Average Annual Returns
 
After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.
 
 
For the periods ended December 31, 2022
Past 1
year
Past 5
years
Life of
fund A
Fidelity® Total Bond ETF
 
 
 
Return Before Taxes 
-12.73%
0.78%
1.63%
Return After Taxes on Distributions 
-13.78%
-0.40%
0.42%
Return After Taxes on Distributions and Sale of Fund Shares 
 
-7.52%
0.15%
0.75%
Bloomberg U.S. Aggregate Bond Index
(reflects no deduction for fees, expenses, or taxes)
 
-13.01%
 
0.02%
 
0.98%
Bloomberg U.S. Universal Bond Index
(reflects no deduction for fees, expenses, or taxes)
 
-12.99%
 
0.18%
 
1.22%
 
 
 
 
AFrom October 6, 2014.
 
 
Investment Adviser
Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. FMR Investment Management (UK) Limited and other investment advisers serve as sub-advisers for the fund.
Portfolio Manager(s)
Michael Foggin (Co-Portfolio Manager) has managed the fund since 2014.
Ford O'Neil (Co-Portfolio Manager) has managed the fund since 2014.
Michael Plage (Co-Portfolio Manager) has managed the fund since 2015.
Celso Munoz (Co-Portfolio Manager) has managed the fund since 2016.
Franco Castagliuolo (Co-Portfolio Manager) has managed the fund since 2022.
Benjamin Harrison (Co-Portfolio Manager) has managed the fund since 2023.
Purchase and Sale of Shares
Shares of the fund are listed and traded on an exchange, and individual fund shares may only be bought and sold in the secondary market through a broker or dealer at market price. These transactions, which do not involve the fund, are made at market prices that may vary throughout the day, rather than at NAV. Shares of the fund may trade at a price greater than the fund's NAV (premium) or less than the fund's NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling fund shares in the secondary market (the "bid-ask spread"). Recent information, including information regarding the fund's NAV, market price, premiums and discounts, and bid-ask spread, is available at www.fidelity.com.
Tax Information
Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary's web site for more information.
 
Fund Basics
Investment Details
 
Investment Objective
Fidelity® Corporate Bond ETF seeks a high level of current income.
Principal Investment Strategies
The Adviser normally invests at least 80% of the fund's assets in corporate bonds and other corporate debt securities and repurchase agreements for those securities.
The Adviser normally invests the fund's assets primarily in investment-grade corporate debt securities and repurchase agreements for those securities.
The Adviser uses the Bloomberg U.S. Credit Bond Index as a guide in structuring the fund and selecting its investments. The Adviser manages the fund to have similar overall interest rate risk to the index.
The Adviser may invest the fund's assets in securities of foreign issuers in addition to securities of domestic issuers.
The Adviser may invest the fund's assets in lower-quality debt securities.
The Adviser may engage in transactions that have a leveraging effect on the fund, including investments in derivatives, regardless of whether the fund may own the asset, instrument, or components of the index underlying the derivative, and forward-settling securities. The Adviser may invest a significant portion of the fund's assets in these types of investments. If the fund invests a significant portion of its assets in derivatives, its investment exposure could far exceed the value of its portfolio securities and its investment performance could be primarily dependent upon securities it does not own. The fund's derivative investments may include interest rate swaps, total return swaps, credit default swaps, options (including options on futures and swaps), and futures contracts (both long and short positions) on securities, other instruments, and indexes. Depending on the Adviser's outlook and market conditions, the Adviser may engage in these transactions to increase or decrease the fund's exposure to changing security prices, interest rates, credit qualities, or other factors that affect security values, or to gain or reduce exposure to an asset, instrument, or index.
In buying and selling securities for the fund, the Adviser analyzes the credit quality of the issuer, security-specific features, current valuation relative to alternatives in the market, short-term trading opportunities resulting from market inefficiencies, and potential future valuation. In managing the fund's exposure to various risks, including interest rate risk, the Adviser considers, among other things, the market's overall risk characteristics, the market's current pricing of those risks, and internal views of potential future market conditions.
In selecting foreign securities, the Adviser's analysis also considers the credit, currency, and economic risks associated with the security and the country of its issuer. The Adviser may also consider an issuer's potential for success in light of its current financial condition, its industry position, and economic and market conditions.
To earn additional income for the fund, the Adviser may use a trading strategy that involves selling (or buying) mortgage securities and simultaneously agreeing to purchase (or sell) mortgage securities on a later date at a set price. This trading strategy may increase interest rate exposure and result in an increased portfolio turnover rate which increases transaction costs and may increase taxable gains.
If the Adviser's strategies do not work as intended, the fund may not achieve its objective.
Shareholders should be aware that investments made by the fund and results achieved by the fund at any given time are not expected to be the same as those made by other funds for which the Adviser or an affiliate acts as manager, including funds with names, investment objectives, and policies that are similar to the fund.
Investment Objective
Fidelity® Investment Grade Bond ETF seeks a high level of current income.
Principal Investment Strategies
The Adviser normally invests at least 80% of the fund's assets in investment-grade debt securities (those of medium and high quality) of all types and repurchase agreements for those securities.
The Adviser uses the Bloomberg U.S. Aggregate Bond Index as a guide in structuring the fund and selecting its investments. The Adviser manages the fund to have similar overall interest rate risk to the index.
The Adviser considers other factors when selecting the fund's investments, including the credit quality of the issuer, security-specific features, current valuation relative to alternatives in the market, short-term trading opportunities resulting from market inefficiencies, and potential future valuation. In managing the fund's exposure to various risks, including interest rate risk, the Adviser considers, among other things, the market's overall risk characteristics, the market's current pricing of those risks, and internal views of potential future market conditions.
The Adviser allocates the fund's assets among different market sectors (for example, corporate, asset-backed, or government securities) and different maturities based on its view of the relative value of each sector or maturity.
The Adviser may invest the fund's assets in securities of foreign issuers in addition to securities of domestic issuers.
The Adviser may invest up to 10% of the fund's assets in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).
The Adviser may engage in transactions that have a leveraging effect on the fund, including investments in derivatives, regardless of whether the fund may own the asset, instrument, or components of the index underlying the derivative, and forward-settling securities. The Adviser may invest a significant portion of the fund's assets in these types of investments. If the fund invests a significant portion of its assets in derivatives, its investment exposure could far exceed the value of its portfolio securities and its investment performance could be primarily dependent upon securities it does not own. The fund's derivative investments may include interest rate swaps, total return swaps, credit default swaps, options (including options on futures and swaps), and futures contracts (both long and short positions) on securities, other instruments, and indexes. Depending on the Adviser's outlook and market conditions, the Adviser may engage in these transactions to increase or decrease the fund's exposure to changing security prices, interest rates, credit qualities, or other factors that affect security values, or to gain or reduce exposure to an asset, instrument, or index.
To earn additional income for the fund, the Adviser may use a trading strategy that involves selling (or buying) mortgage securities and simultaneously agreeing to purchase (or sell) mortgage securities on a later date at a set price. This trading strategy may increase interest rate exposure and result in an increased portfolio turnover rate which increases transaction costs and may increase taxable gains.
If the Adviser's strategies do not work as intended, the fund may not achieve its objective.
Shareholders should be aware that investments made by the fund and results achieved by the fund at any given time are not expected to be the same as those made by other funds for which the Adviser or an affiliate acts as manager, including funds with names, investment objectives, and policies that are similar to the fund.
Investment Objective
Fidelity® Investment Grade Securitized ETF seeks a high level of current income.
Principal Investment Strategies
The Adviser normally invests at least 80% of the fund's assets in investment-grade securitized debt securities (those of medium and high quality) and repurchase agreements for those securities. Securitized debt securities include mortgage-backed securities, commercial mortgage-backed securities, and other asset-backed securities that are issued by the U.S. Government, its agencies or instrumentalities, foreign governments, and corporations. Certain issuers of U.S. Government securities are sponsored or chartered by Congress but their securities are neither issued nor guaranteed by the U.S. Treasury.
The Adviser uses the Bloomberg U.S. Securitized Index as a guide in structuring the fund and selecting its investments. The Adviser manages the fund to have similar overall interest rate risk to the index.
The Adviser may invest the fund's assets in securities of foreign issuers in addition to securities of domestic issuers.
The Adviser considers other factors when selecting the fund's investments, including the credit quality of the issuer, security-specific features, current valuation relative to alternatives in the market, short-term trading opportunities resulting from market inefficiencies, and potential future valuation. In managing the fund's exposure to various risks, including interest rate risk, the Adviser considers, among other things, the market's overall risk characteristics, the market's current pricing of those risks, and internal views of potential future market conditions.
The Adviser allocates the fund's assets among different market sectors (for example, fixed-rate or adjustable rate mortgages) and different maturities based on its view of the relative value of each sector or maturity.
The Adviser may invest the fund's assets in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).
The Adviser may engage in transactions that have a leveraging effect on the fund, including investments in derivatives, regardless of whether the fund may own the asset, instrument, or components of the index underlying the derivative, and forward-settling securities. The Adviser may invest a significant portion of the fund's assets in these types of investments. If the fund invests a significant portion of its assets in derivatives, its investment exposure could far exceed the value of its portfolio securities and its investment performance could be primarily dependent upon securities it does not own. The fund's derivative investments may include interest rate swaps, total return swaps, credit default swaps, options (including options on futures and swaps), and futures contracts (both long and short positions) on securities, other instruments, and indexes. Depending on the Adviser's outlook and market conditions, the Adviser may engage in these transactions to increase or decrease the fund's exposure to changing security prices, interest rates, credit qualities, or other factors that affect security values, or to gain or reduce exposure to an asset, instrument, or index.
To earn additional income for the fund, the Adviser may use a trading strategy that involves selling (or buying) securitized debt securities and simultaneously agreeing to purchase (or sell) securitized debt securities on a later date at a set price. This trading strategy may increase interest rate exposure and result in an increased portfolio turnover rate which increases transaction costs and may increase taxable gains.
If the Adviser's strategies do not work as intended, the fund may not achieve its objective.
Shareholders should be aware that investments made by the fund and results achieved by the fund at any given time are not expected to be the same as those made by other funds for which the Adviser or an affiliate acts as manager, including funds with names, investment objectives, and policies that are similar to the fund.
Investment Objective
Fidelity® Limited Term Bond ETF seeks to provide a high rate of income.
Principal Investment Strategies
The Adviser normally invests at least 80% of the fund's assets in investment-grade debt securities (those of medium and high quality) of all types and repurchase agreements for those securities.
The Adviser uses the Fidelity Limited Term Composite Index℠ as a guide in structuring the fund and selecting its investments. The Adviser manages the fund to have similar overall interest rate risk to the index.
The Adviser considers other factors when selecting the fund's investments, including the credit quality of the issuer, security-specific features, current valuation relative to alternatives in the market, short-term trading opportunities resulting from market inefficiencies, and potential future valuation. In managing the fund's exposure to various risks, including interest rate risk, the Adviser considers, among other things, the market's overall risk characteristics, the market's current pricing of those risks, and internal views of potential future market conditions.
In addition, the fund normally maintains a dollar-weighted average maturity between two and five years. As of August 31, 2023, the fund's dollar-weighted average maturity was approximately 2.7 years and the index's dollar-weighted average maturity was approximately 2.8 years. In determining a security's maturity for purposes of calculating the fund's average maturity, an estimate of the average time for its principal to be paid may be used. This can be substantially shorter than its stated maturity.
The Adviser allocates the fund's assets among different market sectors (for example, corporate, asset-backed, or government securities) and different maturities based on its view of the relative value of each sector or maturity.
The Adviser may invest the fund's assets in securities of foreign issuers in addition to securities of domestic issuers.
The Adviser may also invest the fund's assets in lower-quality debt securities.
The Adviser may engage in transactions that have a leveraging effect on the fund, including investments in derivatives, regardless of whether the fund may own the asset, instrument, or components of the index underlying the derivative, and forward-settling securities. The Adviser may invest a significant portion of the fund's assets in these types of investments. If the fund invests a significant portion of its assets in derivatives, its investment exposure could far exceed the value of its portfolio securities and its investment performance could be primarily dependent upon securities it does not own. The fund's derivative investments may include interest rate swaps, total return swaps, credit default swaps, options (including options on futures and swaps), and futures contracts (both long and short positions) on securities, other instruments, and indexes. Depending on the Adviser's outlook and market conditions, the Adviser may engage in these transactions to increase or decrease the fund's exposure to changing security prices, interest rates, credit qualities, or other factors that affect security values, or to gain or reduce exposure to an asset, instrument, or index.
To earn additional income for the fund, the Adviser may use a trading strategy that involves selling (or buying) mortgage securities and simultaneously agreeing to purchase (or sell) mortgage securities on a later date at a set price. This trading strategy may increase interest rate exposure and result in an increased portfolio turnover rate which increases transaction costs and may increase taxable gains.
If the Adviser's strategies do not work as intended, the fund may not achieve its objective.
Shareholders should be aware that investments made by the fund and results achieved by the fund at any given time are not expected to be the same as those made by other funds for which the Adviser or an affiliate acts as manager, including funds with names, investment objectives, and policies that are similar to the fund.
Investment Objective
Fidelity® Total Bond ETF seeks a high level of current income.
Principal Investment Strategies
The Adviser normally invests at least 80% of the fund's assets in debt securities of all types and repurchase agreements for those securities. The Adviser allocates the fund's assets across investment-grade, high yield, and emerging markets debt securities. The Adviser may invest up to 20% of the fund's assets in lower-quality debt securities. Emerging markets include countries that have an emerging stock market as defined by MSCI, countries or markets with low- to middle-income economies as classified by the World Bank, and other countries or markets that the Adviser identifies as having similar emerging markets characteristics. Emerging markets tend to have relatively low gross national product per capita compared to the world's major economies and may have the potential for rapid economic growth.
The Adviser uses the Bloomberg U.S. Universal Bond Index as a guide in structuring the fund and selecting its investments. The Adviser uses the index as a guide in allocating the fund's assets across the investment-grade, high yield, and emerging markets asset classes. The Adviser manages the fund to have similar overall interest rate risk to the index.
The Adviser considers other factors when selecting the fund's investments, including the credit quality of the issuer, security-specific features, current valuation relative to alternatives in the market, short-term trading opportunities resulting from market inefficiencies, and potential future valuation. In managing the fund's exposure to various risks, including interest rate risk, the Adviser considers, among other things, the market's overall risk characteristics, the market's current pricing of those risks, and internal views of potential future market conditions.
The Adviser may invest the fund's assets in securities of foreign issuers in addition to securities of domestic issuers.
The Adviser may engage in transactions that have a leveraging effect on the fund, including investments in derivatives, regardless of whether the fund may own the asset, instrument, currency, or components of the index underlying the derivative, and forward-settling securities. The Adviser may invest a significant portion of the fund's assets in these types of investments. If the fund invests a significant portion of its assets in derivatives, its investment exposure could far exceed the value of its portfolio securities and its investment performance could be primarily dependent upon securities it does not own. The fund's derivative investments may include interest rate swaps, total return swaps, credit default swaps, options (including options on futures and swaps), forwards, and futures contracts (both long and short positions) on securities, other instruments, indexes, or currencies. Depending on the Adviser's outlook and market conditions, the Adviser may engage in these transactions to increase or decrease the fund's exposure to changing security prices, interest rates, credit qualities, foreign exchange rates, or other factors that affect security values, or to gain or reduce exposure to an asset, instrument, currency, or index.
The Adviser allocates the fund's assets among different asset classes using the composition of the index as a guide, and among different market sectors (for example, corporate, asset-backed, or government securities) and different maturities based on its view of the relative value of each sector or maturity.
In selecting foreign securities, the Adviser's analysis also considers the credit, currency, and economic risks associated with the security and the country of its issuer. The Adviser may also consider an issuer's potential for success in light of its current financial condition, its industry position, and economic and market conditions.
To earn additional income for the fund, the Adviser may use a trading strategy that involves selling (or buying) mortgage securities and simultaneously agreeing to purchase (or sell) mortgage securities on a later date at a set price. This trading strategy may increase interest rate exposure and result in an increased portfolio turnover rate which increases transaction costs and may increase taxable gains.
If the Adviser's strategies do not work as intended, the fund may not achieve its objective.
Shareholders should be aware that investments made by the fund and results achieved by the fund at any given time are not expected to be the same as those made by other funds for which the Adviser or an affiliate acts as manager, including funds with names, investment objectives, and policies that are similar to the fund.
Description of Principal Security Types
Debt securities are used by issuers to borrow money. The issuer usually pays a fixed, variable, or floating rate of interest, and must repay the amount borrowed, usually at the maturity of the security. Some debt securities, such as zero coupon bonds, do not pay current interest but are sold at a discount from their face values. Debt securities include corporate bonds, government securities (including Treasury securities), repurchase agreements, money market securities, mortgage and other asset-backed securities (including collateralized loan obligations), loans and loan participations, and other securities believed to have debt-like characteristics, including hybrids and synthetic securities.
U.S. Government securities are high-quality securities issued or guaranteed by the U.S. Treasury or by an agency or instrumentality of the U.S. Government. U.S. Government securities may be backed by the full faith and credit of the U.S. Treasury, the right to borrow from the U.S. Treasury, or the agency or instrumentality issuing or guaranteeing the security.
Certain issuers of U.S. Government securities, including Fannie Mae, Freddie Mac, and the Federal Home Loan Banks, are sponsored or chartered by Congress but their securities are neither issued nor guaranteed by the U.S. Treasury.
Securitized debt securities are interests in pools of mortgages, loans, receivables, or other assets. Payment of principal or interest generally depends on the cash flows generated by the underlying assets and may be supported by letters of credit, surety bonds, or other credit enhancements. Securitized debt securities have securities that FMR believes have securitized debt-like characteristics, including hybrids and synthetic securities. Securitized debt securities may be U.S. Government securities or issued by a foreign government or a bank or other financial institution.
Commercial mortgage-backed securities are interests in pools of mortgages. The commercial properties underlying the mortgages are typically retail, office, industrial, multi-family housing or hotels. Payment of principal or interest generally depends on the cash flow generated by the underlying mortgages.
Corporate debt securities are bonds and other debt securities issued by corporations and other business structures. Corporate debt securities include repurchase agreements with corporate counterparties and other securities believed to have corporate debt-like characteristics, including hybrids and synthetic securities.
A repurchase agreement is an agreement to buy a security at one price and a simultaneous agreement to sell it back at an agreed-upon price. 
Derivatives are investments whose values are tied to an underlying asset, instrument, currency, or index. Derivatives include futures, options, forwards, and swaps, such as interest rate swaps (exchanging a floating rate for a fixed rate), total return swaps (exchanging a floating rate for the total return of an index, security, or other instrument or investment) and credit default swaps (buying or selling credit default protection). Currency-related derivatives, in particular, include foreign exchange (FX) transactions such as spot FX trades, FX forwards, non-deliverable forwards, and cross-currency FX trades. 
Forward-settling securities involve a commitment to purchase or sell specific securities when issued, or at a predetermined price or yield. When a fund does not already own or have the right to obtain securities equivalent in kind and amount, a commitment to sell securities is equivalent to a short sale. Payment and delivery take place after the customary settlement period.
Principal Investment Risks
Many factors affect each fund's performance. Developments that disrupt global economies and financial markets, such as pandemics and epidemics, may magnify factors that affect a fund's performance. A fund's share price and yield change daily based on changes in market conditions and interest rates and in response to other economic, political, or financial developments. A fund's reaction to these developments will be affected by the types and maturities of securities in which the fund invests, the financial condition, industry and economic sector, and geographic location of an issuer, and the fund's level of investment in the securities of that issuer. Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in a fund will fluctuate. When you sell your shares they may be worth more or less than what you paid for them, which means that you could lose money by investing in a fund.
The following factors can significantly affect a fund's performance:
Interest Rate Changes. Debt securities, including money market securities, have varying levels of sensitivity to changes in interest rates. In general, the price of a debt security can fall when interest rates rise and can rise when interest rates fall. Securities with longer maturities and certain types of securities, such as mortgage securities and the securities of issuers in the financial services sector, can be more sensitive to interest rate changes, meaning the longer the maturity of a security, the greater the impact a change in interest rates could have on the security's price. Short-term and long-term interest rates do not necessarily move in the same amount or the same direction. Short-term securities tend to react to changes in short-term interest rates, and long-term securities tend to react to changes in long-term interest rates. Securities with floating interest rates can be less sensitive to interest rate changes, but may decline in value if their interest rates do not rise as much as interest rates in general. Securities whose payment at maturity is based on the movement of all or part of an index and inflation-protected debt securities may react differently from other types of debt securities. In market environments where interest rates are rising, issuers may be less willing or able to make principal and/or interest payments on securities when due. Although the transition process away from certain benchmark rates, including London Interbank Offered Rate (LIBOR) (an indicative measure of the average interest rate at which major global banks could borrow from one another), has become increasingly well-defined, any potential effects of the transition away from LIBOR and other benchmark rates on financial markets, a fund or the financial instruments in which a fund invests can be difficult to ascertain and may adversely impact a fund's performance.
Foreign Exposure. Foreign securities, foreign currencies, and securities issued by U.S. entities with substantial foreign operations can involve additional risks relating to political, economic, or regulatory conditions in foreign countries. These risks include fluctuations in foreign exchange rates; withholding or other taxes; trading, settlement, custodial, and other operational risks; and the less stringent investor protection and disclosure standards of some foreign markets. All of these factors can make foreign investments, especially those in emerging markets, more volatile and potentially less liquid than U.S. investments. In addition, foreign markets can perform differently from the U.S. market.
Investing in emerging markets can involve risks in addition to and greater than those generally associated with investing in more developed foreign markets. The extent of economic development; political stability; market depth, infrastructure, and capitalization; and regulatory oversight can be less than in more developed markets. Emerging markets typically have less established legal, accounting and financial reporting systems than those in more developed markets, which may reduce the scope or quality of financial information available to investors. Emerging markets economies can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. All of these factors can make emerging markets securities more volatile and potentially less liquid than securities issued in more developed markets.
Global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact issuers or providers in, or foreign exchange rates with, a different country or region.
Securitized Debt Securities Exposure. Securitized debt securities, which include commercial mortgage-backed securities, are dependent on the cash flows generated by the underlying loans, receivables, or other assets, and can be significantly affected by changes in interest rates, the availability of information concerning the underlying assets and their structure, and the creditworthiness of the originators of the loans or other receivables or the entities providing credit support.
Prepayment. Many types of debt securities, including mortgage securities, are subject to prepayment risk. Prepayment risk occurs when the issuer of a security can repay principal prior to the security's maturity. Securities subject to prepayment can offer less potential for gains during a declining interest rate environment and similar or greater potential for loss in a rising interest rate environment. In addition, the potential impact of prepayment features on the price of a debt security can be difficult to predict and result in greater volatility.
Issuer-Specific Changes. Changes in the financial condition of an issuer or counterparty, changes in specific economic or political conditions that affect a particular type of security or issuer, and changes in general economic or political conditions can increase the risk of default by an issuer or counterparty, which can affect a security's or instrument's credit quality or value. The value of securities of smaller, less well-known issuers can be more volatile than that of larger issuers. Entities providing credit support or a maturity-shortening structure also can be affected by these types of changes, and if the structure of a security fails to function as intended, the security could decline in value. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities tend to be particularly sensitive to these changes.
Lower-quality debt securities and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities often fluctuates in response to company, political, or economic developments and can decline significantly over short as well as long periods of time or during periods of general or regional economic difficulty. Lower-quality debt securities can be thinly traded or have restrictions on resale, making them difficult to sell at an acceptable price, and often are considered to be speculative. The default rate for lower-quality debt securities is likely to be higher during economic recessions or periods of high interest rates.
Fluctuation of Net Asset Value and Share Price. The NAV of each fund's shares will generally fluctuate with changes in the market value of each fund's holdings. Each fund's shares are listed on an exchange and can be bought and sold in the secondary market at market prices. The market prices of shares will fluctuate in accordance with changes in NAV and supply and demand on the listing exchange. Although a share's market price is expected to approximate its NAV, it is possible that the market price and NAV will vary significantly. As a result, you may sustain losses if you pay more than the shares' NAV when you purchase shares, or receive less than the shares' NAV when you sell shares, in the secondary market. During periods of disruptions to creations and redemptions, the existence of extreme market volatility, or lack of an active trading market for a fund's shares, the market price of fund shares is more likely to differ significantly from the fund's NAV. During such periods, you may be unable to sell your shares or may incur significant losses if you sell your shares. There are various methods by which investors can purchase and sell shares and various orders that may be placed. Investors should consult their financial intermediary before purchasing or selling shares of a fund. Disruptions at market makers, Authorized Participants or market participants may also result in significant differences between the market price of a fund's shares and the fund's NAV. In addition, in stressed market conditions or periods of market disruption or volatility, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings.
The market price of shares during the trading day, like the price of any exchange-traded security, includes a bid-ask spread charged by the exchange specialist, market makers, or other participants that trade the particular security. In times of severe market disruption or volatility, the bid-ask spread can increase significantly. At those times, shares are most likely to be traded at a discount to NAV, and the discount is likely to be greatest when the price of shares is falling fastest, which may be the time that you most want to sell your shares. Securities held by a fund may be traded in markets that close at a different time than the listing exchange. During the time when the listing exchange is open but after the applicable market closing, fixing or settlement times, bid-ask spreads and the resulting premium or discount to the fund's NAV may widen. The Adviser expects that, under normal market conditions, large discounts or premiums to NAV will not be sustained in the long term because of arbitrage opportunities.
Trading Issues. Although shares are listed on an exchange, there can be no assurance that an active trading market or requirements to remain listed will be met or maintained. Only an Authorized Participant may engage in creation or redemption transactions directly with a fund. A fund has a limited number of intermediaries that act as Authorized Participants. There are no obligations of market makers to make a market in a fund's shares or of Authorized Participants to submit purchase or redemption orders for Creation Units. Decisions by market makers or Authorized Participants to reduce their role with respect to market making or creation and redemption activities during times of market stress, or a decline in the number of Authorized Participants due to decisions to exit the business, bankruptcy, or other factors, could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying value of a fund's portfolio securities and the market price of fund shares. To the extent no other Authorized Participants are able to step forward to create or redeem, shares may trade at a discount to NAV and possibly face delisting. In addition, trading of shares in the secondary market may be halted, for example, due to activation of marketwide "circuit breakers." If trading halts or an unanticipated early closing of the listing exchange occurs, a shareholder may be unable to purchase or sell shares of a fund. FDC, the distributor of each fund's shares, does not maintain a secondary market in the shares.
If a fund's shares are delisted from the listing exchange, the Adviser may seek to list the fund shares on another market, merge the fund with another exchange-traded fund or traditional mutual fund, or redeem the fund shares at NAV.
Shares of a fund, similar to shares of other issuers listed on a stock exchange, may be sold short and are therefore subject to the risk of increased volatility and price decreases associated with being sold short.
Leverage Risk. Derivatives, forward-settling securities, and short sale transactions involve leverage because they can provide investment exposure in an amount exceeding the initial investment. Leverage can magnify investment risks and cause losses to be realized more quickly. A small change in the underlying asset, instrument, or index can lead to a significant loss. Forward-settling securities and short sale transactions also involve the risk that a security will not be issued, delivered, available for purchase, or paid for when anticipated. An increase in the market price of securities sold short will result in a loss. Government legislation or regulation could affect the use of these transactions and could limit a fund's ability to pursue its investment strategies.
Cash Transactions Risk. Unlike certain ETFs, each fund may effect some or all creations and redemptions using cash, rather than in-kind securities. Therefore, it may be required to sell portfolio securities and recognize gains on such sales that the fund might not have recognized if it were to distribute portfolio securities in-kind. As a result, an investment in the fund may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind. The use of cash creations and redemptions may also cause the fund's shares to trade in the market at greater bid-ask spreads or greater premiums or discounts to the fund's NAV. Furthermore, cash creation and redemption transactions may result in certain brokerage, tax, foreign exchange, execution, price movement and other costs and expenses related to the execution of trades resulting from such transactions. To the extent that the maximum additional charge for creation or redemption transactions is insufficient to cover these costs and expenses, the fund's performance could be negatively impacted.
High Portfolio Turnover. A fund may engage in active and frequent trading of its portfolio securities. High portfolio turnover (more than 100%) may result in increased transaction costs to a fund, including brokerage commissions, dealer mark-ups, and other transaction costs on the sale of securities or reinvestment in other securities. The sale of a fund's securities may result in the realization and/or distribution to shareholders of higher capital gains or losses as compared to a fund with less active trading policies. These effects of higher than normal portfolio turnover may adversely affect a fund's performance.
In response to market, economic, political, or other conditions, a fund may temporarily use a different investment strategy for defensive purposes. If the fund does so, different factors could affect its performance and the fund may not achieve its investment objective.
Other Investment Strategies
In addition to the principal investment strategies discussed above, the Adviser may invest Fidelity® Limited Term Bond ETF, Fidelity® Investment Grade Bond ETF, Fidelity® Investment Grade Securitized ETF, and Fidelity® Total Bond ETF in collateralized loan obligations.
 
Fundamental Investment Policies
The following is fundamental, that is, subject to change only by shareholder approval:
Fidelity® Corporate Bond ETF seeks a high level of current income.
 
 
 
Fidelity® Limited Term Bond ETF seeks to provide a high rate of income.
 
Fidelity® Total Bond ETF seeks a high level of current income.
 
 
 
Non-Fundamental Investment Policies
Each of Fidelity® Investment Grade Bond ETF's and Fidelity® Investment Grade Securitized ETF's investment objective is non-fundamental and may be changed without shareholder approval.
 
Shareholder Notice
The following is subject to change only upon 60 days' prior notice to shareholders:
Fidelity® Corporate Bond ETF normally invests at least 80% of its assets in corporate bonds and other corporate debt securities and repurchase agreements for those securities.
Fidelity® Investment Grade Bond ETF normally invests at least 80% of its assets in investment-grade debt securities (those of medium and high quality) of all types and repurchase agreements for those securities.
Fidelity® Investment Grade Securitized ETF normally invests at least 80% of its assets in investment-grade securitized debt securities (those of medium and high quality) and repurchase agreements for those securities.
Fidelity® Limited Term Bond ETF normally invests at least 80% of its assets in investment-grade debt securities of all types and repurchase agreements for those securities.
Fidelity® Total Bond ETF normally invests at least 80% of its assets in debt securities of all types and repurchase agreements for those securities.
Valuing Shares
 
Each fund is open for business each day that either the listing exchange or the New York Stock Exchange (NYSE) is open.
The NAV is the value of a single share. Fidelity normally calculates NAV as of the close of regular trading hours on the listing exchange or the NYSE, normally 4:00 p.m. Eastern time. Each fund's assets normally are valued as of this time for the purpose of computing NAV. The prices at which creations and redemptions occur are based on the next calculation of NAV after a creation or redemption order is received in an acceptable form under the authorized participant agreement.
NAV is not calculated and a fund will not process purchase and redemption requests submitted on days when the fund is not open for business. The time at which shares are priced and until which purchase and redemption orders are accepted may be changed as permitted by the Securities and Exchange Commission (SEC).
Shares of each fund may be purchased through a broker in the secondary market by individual investors at market prices which may vary throughout the day and may differ from NAV.
To the extent that a fund's assets are traded in other markets on days when the fund is not open for business, the value of the fund's assets may be affected on those days. In addition, trading in some of a fund's assets may not occur on days when the fund is open for business.
Shares of open-end funds in which each fund may invest (referred to as underlying funds) are valued at their respective NAVs. NAV is calculated using the values of any underlying funds in which it invests. Other assets are valued primarily on the basis of market quotations, official closing prices, or information furnished by a pricing service. Certain short-term securities are valued on the basis of amortized cost. If market quotations, official closing prices, or information furnished by a pricing service are not readily available or, in the Adviser's opinion, are deemed unreliable for a security, then that security will be fair valued in good faith by the Adviser in accordance with applicable fair value pricing policies. For example, if, in the Adviser's opinion, a security's value has been materially affected by events occurring before a fund's pricing time but after the close of the exchange or market on which the security is principally traded, then that security will be fair valued in good faith by the Adviser in accordance with applicable fair value pricing policies. Fair value pricing will be used for high yield debt securities when available pricing information is determined to be stale or for other reasons not to accurately reflect fair value.
Fair value pricing is based on subjective judgments and it is possible that the fair value of a security may differ materially from the value that would be realized if the security were sold.
 
Shareholder Information
Additional Information about the Purchase and Sale of Shares
 
As used in this prospectus, the term "shares" generally refers to the shares offered through this prospectus.
General Information
Information on Fidelity
Fidelity Investments was established in 1946 to manage one of America's first mutual funds. Today, Fidelity is one of the world's largest providers of financial services.
In addition to its fund business, the company operates one of America's leading brokerage firms, Fidelity Brokerage Services LLC. Fidelity is also a leader in providing tax-advantaged retirement plans for individuals investing on their own or through their employer. 
The Depository Trust Company (DTC) is a limited trust company and securities depository that facilitates the clearance and settlement of trades for its participating banks and broker-dealers. DTC has executed an agreement with FDC, each fund's distributor.
Buying and Selling Shares in the Secondary Market
Shares of each fund are listed and traded on an exchange, and individual fund shares may only be bought and sold in the secondary market through a broker. Each fund does not impose any minimum investment for shares of a fund purchased on an exchange. These transactions are made at market prices that may vary throughout the day and may be greater than a fund's NAV (premium) or less than a fund's NAV (discount). As a result, you may pay more than NAV when you purchase shares, and receive less than NAV when you sell shares, in the secondary market. If you buy or sell shares in the secondary market, you will generally incur customary brokerage commissions and charges. Due to such commissions and charges, frequent trading may detract significantly from investment returns.
Each fund is designed to offer investors an investment that can be bought and sold frequently in the secondary market without impact on a fund, and such trading activity is critical to ensuring that the market price of fund shares remains at or close to NAV. Accordingly, the Board of Trustees has not adopted policies and procedures designed to discourage excessive or short-term trading by these investors.
Shares can be purchased and redeemed directly from each fund at NAV only by Authorized Participants in large increments called "Creation Units." Each fund accommodates frequent purchases and redemptions of Creation Units by Authorized Participants and does not place a limit on purchases or redemptions of Creation Units by these investors. Each fund reserves the right, but does not have the obligation, to reject any purchase transaction at any time. In addition, each fund reserves the right to impose restrictions on disruptive, excessive, or short-term trading.
Precautionary Notes
  • Note to Investment Companies. For purposes of the Investment Company Act of 1940 (1940 Act), shares are issued by a fund, and the acquisition of shares by investment companies is subject to the restrictions of Section 12(d)(1) of the 1940 Act. Registered investment companies are permitted to invest in a fund beyond the limits set forth in Section 12(d)(1), subject to certain terms and conditions, including that such investment companies enter into an agreement with the fund.
  • Note to Authorized Participants Regarding Continuous Offering. Certain legal risks may exist that are unique to Authorized Participants purchasing Creation Units directly from a fund. Because new Creation Units may be issued on an ongoing basis, at any point a "distribution," as such term is used in the Securities Act of 1933 (the Securities Act), could be occurring. As a broker-dealer, certain activities that you perform may, depending on the circumstances, result in your being deemed a participant in a distribution, in a manner which could render you a statutory underwriter and subject you to the prospectus delivery and liability provisions of the Securities Act.
For example, you may be deemed a statutory underwriter if you purchase Creation Units from a fund, break them down into individual fund shares, and sell such shares directly to customers, or if you choose to couple the creation of a supply of new fund shares with an active selling effort involving solicitation of secondary market demand for fund shares. A determination of whether a person is an underwriter for purposes of the Securities Act depends upon all of the facts and circumstances pertaining to that person's activities, and the examples mentioned here should not be considered a complete description of all the activities that could lead to a categorization as an underwriter.
Dealers who are not "underwriters" but are participating in a distribution (as opposed to engaging in ordinary secondary market transactions), and thus dealing with shares as part of an "unsold allotment" within the meaning of Section 4(a)(3)(C) of the Securities Act, will be unable to take advantage of the prospectus delivery exemption provided by Section 4(a)(3) of the Securities Act.
This is because the prospectus delivery exemption in Section 4(a)(3) of the Securities Act is not available in respect of such transactions as a result of Section 24(d) of the 1940 Act. As a result, you should note that dealers who are not underwriters but are participating in a distribution (as opposed to engaging in ordinary secondary market transactions) and thus dealing with the shares that are part of an overallotment within the meaning of Section 4(a)(3)(A) of the Securities Act would be unable to take advantage of the prospectus delivery exemption provided by Section 4(a)(3) of the Securities Act. Firms that incur a prospectus-delivery obligation with respect to shares of a fund are reminded that, under Rule 153 under the Securities Act, a prospectus delivery obligation under Section 5(b)(2) of the Securities Act owed to an exchange member in connection with a sale on an exchange is satisfied by the fact that the prospectus is available at the exchange upon request. The prospectus delivery mechanism provided in Rule 153 is only available with respect to transactions on an exchange. Certain affiliates of each fund may purchase and resell fund shares pursuant to this prospectus.
  • Note to Secondary Market Investors. DTC, or its nominee, is the registered owner of all outstanding shares of a fund. The Adviser will not have any record of your ownership. Your ownership of shares will be shown on the records of DTC and the DTC participant broker through which you hold the shares. Your broker will provide you with account statements, confirmations of your purchases and sales, and tax information. Your broker will also be responsible for distributing income and capital gain distributions and for sending you shareholder reports and other information as may be required.
Costs Associated with Creations and Redemptions 
The funds may impose a creation transaction fee and a redemption transaction fee to offset transfer and other transaction costs associated with the issuance and redemption of Creation Units of shares. Information about the procedures regarding creation and redemption of Creation Units and the applicable transaction fees is included in the Statement of Additional Information (SAI).
Dividends and Capital Gain Distributions
 
Each fund earns interest, dividends, and other income from its investments, and distributes this income (less expenses) to shareholders as dividends. Each fund also realizes capital gains from its investments, and distributes these gains (less any losses) as capital gain distributions. If you purchased your shares in the secondary market, your broker is responsible for distributing the income and capital gain distributions to you.
Each fund normally declares dividends and pays capital gain distributions per the tables below:
Fund Name
 
Dividends Paid
Fidelity® Corporate Bond ETF
 
January, February, March, April, May, June, July, August, September, October, November, December
Fidelity® Investment Grade Bond ETF
 
January, February, March, April, May, June, July, August, September, October, November, December
Fidelity® Investment Grade Securitized ETF
 
January, February, March, April, May, June, July, August, September, October, November, December
Fidelity® Limited Term Bond ETF
 
January, February, March, April, May, June, July, August, September, October, November, December
Fidelity® Total Bond ETF
 
January, February, March, April, May, June, July, August, September, October, November, December
Fund Name
 
Capital Gains Paid
Fidelity® Corporate Bond ETF
 
December
Fidelity® Investment Grade Bond ETF
 
December
Fidelity® Investment Grade Securitized ETF
 
December
Fidelity® Limited Term Bond ETF
 
December
Fidelity® Total Bond ETF
 
December
Tax Consequences
 
As with any investment, your investment in a fund could have tax consequences for you (for non-retirement accounts).
Taxes on Distributions
Distributions investors receive are subject to federal income tax, and may also be subject to state or local taxes.
For federal tax purposes, certain distributions, including dividends and distributions of short-term capital gains, are taxable to investors as ordinary income, while certain distributions, including distributions of long-term capital gains, are taxable to investors generally as capital gains. A percentage of certain distributions of dividends may qualify for taxation at long-term capital gains rates (provided certain holding period requirements are met). Because each fund's income is primarily derived from interest, dividends from each fund generally will not qualify for the long-term capital gains tax rates available to individuals.
Each fund may effect creations and redemptions using cash rather than in-kind securities and may recognize more capital gains and be less tax-efficient than if in-kind securities were used. When  a fund effects its redemptions with cash rather than with in-kind securities, the fund may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds, which involves transaction costs and may cause the fund to recognize gains that might not have been otherwise recognized or to recognize such gains sooner than otherwise. Losses from sales of immediately reacquired securities are subject to deferral, potentially indefinitely. Each fund generally intends to distribute net annual gains, if any, to shareholders to comply with applicable tax rules, causing shareholders to be subject to tax on gains they would not otherwise be subject to or at an earlier date then if the fund effected redemptions in-kind.
If investors buy shares when a fund has realized but not yet distributed income or capital gains, they will be "buying a dividend" by paying the full price for the shares and then receiving a portion of the price back in the form of a taxable distribution.
Any taxable distributions you receive from a fund will normally be taxable to you when you receive them; however, you will receive certain December distributions in January, but those distributions will be taxable as if you received them on December 31.
Taxes on Transactions
Purchases and sales of shares, as well as purchases and redemptions of Creation Units, may result in a capital gain or loss for federal tax purposes.
Fund Services
Fund Management
 
Adviser
FMR. The Adviser is each fund's manager. The address of the Adviser is 245 Summer Street, Boston, Massachusetts 02210.
As of December 31, 2022, the Adviser had approximately $3.1 trillion in discretionary assets under management, and approximately $3.9 trillion when combined with all of its affiliates' assets under management.
As the manager, the Adviser has overall responsibility for directing each fund's investments and handling its business affairs.
Sub-Adviser(s)
FMR Investment Management (UK) Limited (FMR UK), at 1 St. Martin's Le Grand, London, EC1A 4AS, United Kingdom, serves as a sub-adviser for each fund. As of December 31, 2022, FMR UK had approximately $14.7 billion in discretionary assets under management. FMR UK is an affiliate of the Adviser.
Currently, FMR UK has day-to-day responsibility for choosing certain types of investments for Fidelity® Total Bond ETF.
FMR UK may provide investment research and advice on issuers based outside the United States and may also provide investment advisory services for Fidelity® Corporate Bond ETF, Fidelity® Investment Grade Bond ETF, Fidelity® Investment Grade Securitized ETF, and Fidelity® Limited Term Bond ETF.
Fidelity Management & Research (Hong Kong) Limited (FMR H.K.), at Floor 19, 41 Connaught Road Central, Hong Kong, serves as a sub-adviser for each fund. As of December 31, 2022, FMR H.K. had approximately $21.4 billion in discretionary assets under management. FMR H.K. is an affiliate of the Adviser.
FMR H.K. may provide investment research and advice on issuers based outside the United States and may also provide investment advisory services for Fidelity® Corporate Bond ETF, Fidelity® Investment Grade Bond ETF, Fidelity® Investment Grade Securitized ETF, Fidelity® Limited Term Bond ETF, and Fidelity® Total Bond ETF.
Fidelity Management & Research (Japan) Limited (FMR Japan), at Kamiyacho Prime Place, 1-17, Toranomon-4-Chome, Minato-ku, Tokyo, Japan, serves as a sub-adviser for each fund. As of March 31, 2023, FMR Japan had approximately $2.9 billion in discretionary assets under management. FMR Japan is an affiliate of the Adviser.
FMR Japan may provide investment research and advice on issuers based outside the United States and may also provide investment advisory services for Fidelity® Corporate Bond ETF, Fidelity® Investment Grade Bond ETF, Fidelity® Investment Grade Securitized ETF, Fidelity® Limited Term Bond ETF, and Fidelity® Total Bond ETF.
Portfolio Manager(s)
Matthew Bartlett is Co-Portfolio Manager of Fidelity® Corporate Bond ETF, which he has managed since 2016. He also manages other funds. Since joining Fidelity Investments in 2005, Mr. Bartlett has worked as a managing director of research, research analyst, and portfolio manager.
Jay Small is Co-Portfolio Manager of Fidelity® Corporate Bond ETF, which he has managed since 2020. He also manages other funds. Since joining Fidelity Investments in 2010, Mr. Small has worked as a corporate bond trader and portfolio manager.
Dr. Ben Tarlow is Co-Portfolio Manager of Fidelity® Corporate Bond ETF, which he has managed since 2019. He also manages other funds. Since joining Fidelity Investments in 2010, Dr. Tarlow has worked as a quantitative analyst and portfolio manager.
Jeff Moore is Co-Portfolio Manager of Fidelity® Investment Grade Bond ETF, which he has managed since 2021. He also manages other funds. Since joining Fidelity Investments in 1995, Mr. Moore has worked as a research analyst and portfolio manager.
Michael Plage is Co-Portfolio Manager of Fidelity® Investment Grade Bond ETF, which he has managed since 2021, and Co-Portfolio Manager of Fidelity® Total Bond ETF, which he has managed since 2015. He also manages other funds. Since joining Fidelity Investments in 2005, Mr. Plage has worked as a trader and portfolio manager.
Franco Castagliuolo is Co-Portfolio Manager of Fidelity® Investment Grade Securitized ETF, which he has managed since 2021, and Co-Portfolio Manager of Fidelity® Total Bond ETF, which he has managed since 2022. He also manages other funds. Since joining Fidelity Investments in 1996, Mr. Castagliuolo has worked as a research associate and portfolio manager.
Sean Corcoran is Co-Portfolio Manager of Fidelity® Investment Grade Securitized ETF, which he has managed since 2021. He also manages other funds. Since joining Fidelity Investments in 2001, Mr. Corcoran has worked as a research analyst and portfolio manager.
David DeBiase is Co-Portfolio Manager of Fidelity® Limited Term Bond ETF, which he has managed since 2018. He also manages other funds. Since joining Fidelity Investments in 2006, Mr. DeBiase has worked as a trader and portfolio manager.
Rob Galusza is Co-Portfolio Manager of Fidelity® Limited Term Bond ETF, which he has managed since 2014. He also manages other funds. Since joining Fidelity Investments in 1987, Mr. Galusza has worked as a research analyst and portfolio manager.
Julian Potenza is Co-Portfolio Manager of Fidelity® Limited Term Bond ETF, which he has managed since 2020. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.
Michael Foggin is Co-Portfolio Manager of Fidelity® Total Bond ETF, which he has managed since 2014. He also manages other funds. Since joining Fidelity Investments in 2012, Mr. Foggin has worked as a portfolio manager.
Benjamin Harrison is Co-Portfolio Manager of Fidelity® Total Bond ETF, which he has managed since 2023. He also manages other funds. Since joining Fidelity Investments in 2009, Mr. Harrison has worked as a managing director of research and business development and portfolio manager.
Celso Munoz is Co-Portfolio Manager of Fidelity® Total Bond ETF, which he has managed since 2016. He also manages other funds. Since joining Fidelity Investments in 2005, Mr. Munoz has worked as a research analyst and portfolio manager.
Ford O'Neil is Co-Portfolio Manager of Fidelity® Total Bond ETF, which he has managed since 2014. He also manages other funds. Since joining Fidelity Investments in 1989, Mr. O'Neil has worked as a research analyst and portfolio manager.
The SAI provides additional information about the compensation of, any other accounts managed by, and any fund shares held by the portfolio manager(s). 
From time to time a manager, analyst, or other Fidelity employee may express views regarding a particular company, security, industry, or market sector. The views expressed by any such person are the views of only that individual as of the time expressed and do not necessarily represent the views of Fidelity or any other person in the Fidelity organization. Any such views are subject to change at any time based upon market or other conditions and Fidelity disclaims any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any fund. 
Advisory Fee(s)
Each fund pays a management fee to the Adviser.
The management fee is calculated and paid to the Adviser every month.
The Adviser pays all of the other expenses of Fidelity® Corporate Bond ETF, Fidelity® Investment Grade Bond ETF, Fidelity® Investment Grade Securitized ETF, Fidelity® Limited Term Bond ETF, and Fidelity® Total Bond ETF with limited exceptions.
For Fidelity® Limited Term Bond ETF, the total management fee for the fiscal year ended August 31, 2023, was 0.32% of the fund's average net assets. On April 1, 2023, Fidelity® Limited Term Bond ETF's annual management fee rate has been reduced to 0.25% of its average net assets.  
 
The annual management fee rate for Fidelity® Corporate Bond ETF, Fidelity® Investment Grade Bond ETF, Fidelity® Investment Grade Securitized ETF, and Fidelity® Total Bond ETF, as a percentage of each fund's average net assets, is shown in the following table:
Fund
Management Fee Rate
Fidelity® Corporate Bond ETF
0.36%
Fidelity® Investment Grade Bond ETF
0.36%
Fidelity® Investment Grade Securitized ETF
0.36%
Fidelity® Total Bond ETF
0.36%
The Adviser pays FMR Investment Management (UK) Limited, Fidelity Management & Research (Hong Kong) Limited, and Fidelity Management & Research (Japan) Limited for providing sub-advisory services.
The basis for the Board of Trustees approving the management contract and sub-advisory agreements for each fund is available in each fund's semi-annual report for the fiscal period ended February 28, 2023 and Fidelity® Limited Term Bond ETF's annual report for the fiscal period ended August 31, 2023.
From time to time, the Adviser or its affiliates may agree to reimburse or waive certain fund expenses while retaining the ability to be repaid if expenses fall below the specified limit prior to the end of the fiscal year.
Reimbursement or waiver arrangements can decrease expenses and boost performance.
FMR has contractually agreed to reimburse Fidelity® Investment Grade Bond ETF to the extent proxy and shareholder meeting expenses exceed 0.003% of the fund's average net assets. This arrangement will remain in effect through December 31, 2024. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees and may extend it in its discretion after that date.
Fund Distribution
 
FDC distributes each fund's shares.
Intermediaries may receive from the Adviser, FDC, and/or their affiliates compensation for providing recordkeeping and administrative services, as well as other retirement plan expenses, and compensation for services intended to result in the sale of fund shares.
These payments are described in more detail in this section and in the SAI.
Distribution and Service Plan(s)
While each fund will not make direct payments for distribution or shareholder support services, each fund has adopted a Distribution and Service Plan pursuant to Rule 12b-1 under the 1940 Act with respect to its shares. Each Plan recognizes that the Adviser may use its management fee revenues, as well as its past profits or its resources from any other source, to pay FDC for expenses incurred in connection with providing services intended to result in the sale of shares of each fund and/or shareholder support services. The Adviser, directly or through FDC, may pay significant amounts to intermediaries that provide those services. Currently, the Board of Trustees of each fund has authorized such payments for shares of each fund.     
If payments made by the Adviser to FDC or to intermediaries under a Distribution and Service Plan were considered to be paid out of a fund's assets on an ongoing basis, they might increase the cost of your investment and might cost you more than paying other types of sales charges.
No dealer, sales representative, or any other person has been authorized to give any information or to make any representations, other than those contained in this prospectus and in the related SAI, in connection with the offer contained in this prospectus. If given or made, such other information or representations must not be relied upon as having been authorized by the funds or FDC. This prospectus and the related SAI do not constitute an offer by the funds or by FDC to sell shares of the funds to, or to buy shares of the funds from, any person to whom it is unlawful to make such offer.
Other Service Providers
 
State Street Bank and Trust Company serves as each fund's transfer agent and custodian, and is located at One Heritage Drive, Floor 1, North Quincy, Massachusetts, 02171 and 1 Lincoln Street, Boston, Massachusetts, 02111, respectively. 
 
Appendix
Financial Highlights
 
 
Financial Highlights are intended to help you understand the financial history of fund shares for the past 5 years (or, if shorter, the period of operations). Certain information reflects financial results for a single share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in shares (assuming reinvestment of all dividends and distributions). The annual information has been audited by PricewaterhouseCoopers LLP, independent registered public accounting firm, whose report, along with fund financial statements, is included in the annual report. Annual reports are available for free upon request. 
 
 
Fidelity® Corporate Bond ETF
 
Years ended August 31,
 
2023  
 
2022 
 
2021  
 
2020 
 
2019 
  Selected Per-Share Data 
 
 
 
 
 
 
 
 
 
 
  Net asset value, beginning of period
$
46.23
$
56.09
$
55.93
$
53.26
$
48.64
  Income from Investment Operations
 
 
 
 
 
 
 
 
 
 
     Net investment income (loss) A,B
 
1.663
 
1.339
 
1.321
 
1.546
 
1.732
     Net realized and unrealized gain (loss)
 
(1.142)
 
(9.824)
 
.387
 
2.655
 
4.610
  Total from investment operations
 
.521  
 
(8.485)  
 
1.708  
 
4.201  
 
6.342
  Distributions from net investment income
 
(1.661)
 
(1.375)
 
(1.308)
 
(1.531)
 
(1.722)
  Distributions from net realized gain
 
-
 
-
 
(.244)
 
-
 
-
     Total distributions
 
(1.661)
 
(1.375)
 
(1.552)
 
(1.531)
 
(1.722)
  Net asset value, end of period
$
45.09
$
46.23
$
56.09
$
55.93
$
53.26
 Total Return C,D
 
1.19%
 
(15.30)%
 
3.11%
 
8.06%
 
13.39%
 Ratios to Average Net Assets B,E,F
 
 
 
 
 
 
 
 
 
 
    Expenses before reductions
 
.36%
 
.36%
 
.36%
 
.36%
 
.36%
    Expenses net of fee waivers, if any
 
.36%
 
.36%
 
.36%
 
.36%
 
.36%
    Expenses net of all reductions
 
.36%
 
.36%
 
.36%
 
.36%
 
.36%
    Net investment income (loss)
 
3.68%
 
2.60%
 
2.38%
 
2.88%
 
3.45%
 Supplemental Data
 
 
 
 
 
 
 
 
 
 
    Net assets, end of period (000 omitted)
$
171,347
$
159,490
$
294,461
$
206,932
$
127,822
    Portfolio turnover rate G
 
28% H
 
32% H
 
26% H
 
31% H
 
40%
 
ACalculated based on average shares outstanding during the period.
 
BNet investment income (loss) is affected by the timing of the declaration of dividends by any underlying mutual funds or exchange-traded funds (ETFs). Net investment income (loss) of any mutual funds or ETFs is not included in the Fund's net investment income (loss) ratio.
 
CTotal returns would have been lower if certain expenses had not been reduced during the applicable periods shown.
 
DBased on net asset value.
 
EFees and expenses of any underlying mutual funds or exchange-traded funds (ETFs) are not included in the Fund's expense ratio. The Fund indirectly bears its proportionate share of these expenses.
 
FExpense ratios reflect operating expenses of the class. Expenses before reductions do not reflect amounts reimbursed, waived, or reduced through arrangements with the investment adviser, brokerage services, or other offset arrangements, if applicable, and do not represent the amount paid by the class during periods when reimbursements, waivers or reductions occur.
 
GAmount does not include the portfolio activity of any underlying mutual funds or exchange-traded funds (ETFs).
 
HPortfolio turnover rate excludes securities received or delivered in-kind.
 
 
Fidelity® Investment Grade Bond ETF
 
Years ended August 31,
 
2023  
 
2022 
 
2021 A
  Selected Per-Share Data 
 
 
 
 
 
 
  Net asset value, beginning of period
$
44.05
$
50.76
$
50.00
  Income from Investment Operations
 
 
 
 
 
 
     Net investment income (loss) B,C
 
1.615
 
.788
 
.287
     Net realized and unrealized gain (loss)
 
(1.987)
 
(6.657)
 
.790
  Total from investment operations
 
(.372)  
 
(5.869)  
 
1.077  
  Distributions from net investment income
 
(1.488)
 
(.841)
 
(.317)
     Total distributions
 
(1.488)
 
(.841)
 
(.317)
  Net asset value, end of period
$
42.19
$
44.05
$
50.76
 Total Return D,E,F
 
(.83)%
 
(11.65)%
 
2.16%
 Ratios to Average Net Assets C,G,H
 
 
 
 
 
 
    Expenses before reductions
 
.36%
 
.36%
 
.36% I
    Expenses net of fee waivers, if any
 
.36%
 
.36%
 
.36% I
    Expenses net of all reductions
 
.36%
 
.36%
 
.36% I
    Net investment income (loss)
 
3.80%
 
1.65%
 
1.14% I
 Supplemental Data
 
 
 
 
 
 
    Net assets, end of period (000 omitted)
$
29,531
$
6,607
$
10,151
    Portfolio turnover rate J
 
190%
 
37% K
 
19% L
 
AFor the period March 2, 2021 (commencement of operations) through August 31, 2021.
 
BCalculated based on average shares outstanding during the period.
 
CNet investment income (loss) is affected by the timing of the declaration of dividends by any underlying mutual funds or exchange-traded funds (ETFs). Net investment income (loss) of any mutual funds or ETFs is not included in the Fund's net investment income (loss) ratio.
 
DBased on net asset value.
 
ETotal returns for periods of less than one year are not annualized.
 
FTotal returns would have been lower if certain expenses had not been reduced during the applicable periods shown.
 
GFees and expenses of any underlying mutual funds or exchange-traded funds (ETFs) are not included in the Fund's expense ratio. The Fund indirectly bears its proportionate share of these expenses.
 
HExpense ratios reflect operating expenses of the class. Expenses before reductions do not reflect amounts reimbursed, waived, or reduced through arrangements with the investment adviser, brokerage services, or other offset arrangements, if applicable, and do not represent the amount paid by the class during periods when reimbursements, waivers or reductions occur.
 
IAnnualized.
 
JAmount does not include the portfolio activity of any underlying mutual funds or exchange-traded funds (ETFs).
 
KPortfolio turnover rate excludes securities received or delivered in-kind.
 
LAmount not annualized.
 
 
Fidelity® Investment Grade Securitized ETF
 
Years ended August 31,
 
2023  
 
2022 
 
2021 A
  Selected Per-Share Data 
 
 
 
 
 
 
  Net asset value, beginning of period
$
43.99
$
49.93
$
50.00
  Income from Investment Operations
 
 
 
 
 
 
     Net investment income (loss) B,C
 
1.365
 
.301
 
.023
     Net realized and unrealized gain (loss)
 
(2.294)
 
(5.501)
 
.160
  Total from investment operations
 
(.929)  
 
(5.200)  
 
.183  
  Distributions from net investment income
 
(1.381)
 
(.300)
 
(.078) D
  Distributions from net realized gain
 
-
 
-
 
(.027) D
  Tax return of capital
 
-
 
(.440)
 
(.145)
     Total distributions
 
(1.381)
 
(.740)
 
(.250)
  Net asset value, end of period
$
41.68
$
43.99
$
49.93
 Total Return E,F,G
 
(2.10)%
 
(10.49)%
 
.36%
 Ratios to Average Net Assets C,H,I
 
 
 
 
 
 
    Expenses before reductions
 
.37%
 
.36%
 
.36% J
    Expenses net of fee waivers, if any
 
.36%
 
.36%
 
.36% J
    Expenses net of all reductions
 
.36%
 
.36%
 
.36% J
    Net investment income (loss)
 
3.22%
 
.63%
 
.09% J
 Supplemental Data
 
 
 
 
 
 
    Net assets, end of period (000 omitted)
$
3,126
$
3,299
$
9,986
    Portfolio turnover rate K
 
865%
 
141%
 
65% L
 
AFor the period March 2, 2021 (commencement of operations) through August 31, 2021.
 
BCalculated based on average shares outstanding during the period.
 
CNet investment income (loss) is affected by the timing of the declaration of dividends by any underlying mutual funds or exchange-traded funds (ETFs). Net investment income (loss) of any mutual funds or ETFs is not included in the Fund's net investment income (loss) ratio.
 
DThe amount shown reflects reclassifications related to book to tax differences that were made in the year shown.
 
EBased on net asset value.
 
FTotal returns for periods of less than one year are not annualized.
 
GTotal returns would have been lower if certain expenses had not been reduced during the applicable periods shown.
 
HFees and expenses of any underlying mutual funds or exchange-traded funds (ETFs) are not included in the Fund's expense ratio. The Fund indirectly bears its proportionate share of these expenses. For additional expense information related to investments in Fidelity Central Funds, please refer to the "Investments in Fidelity Central Funds" note found in the Notes to Financial Statements section of the most recent Annual or Semi-Annual report.
 
IExpense ratios reflect operating expenses of the class. Expenses before reductions do not reflect amounts reimbursed, waived, or reduced through arrangements with the investment adviser, brokerage services, or other offset arrangements, if applicable, and do not represent the amount paid by the class during periods when reimbursements, waivers or reductions occur.
 
JAnnualized.
 
KAmount does not include the portfolio activity of any underlying mutual funds or exchange-traded funds (ETFs).
 
LAmount not annualized.
 
 
Fidelity® Limited Term Bond ETF
 
Years ended August 31,
 
2023  
 
2022 
 
2021  
 
2020 
 
2019 
  Selected Per-Share Data 
 
 
 
 
 
 
 
 
 
 
  Net asset value, beginning of period
$
48.55
$
52.44
$
52.52
$
51.07
$
49.42
  Income from Investment Operations
 
 
 
 
 
 
 
 
 
 
     Net investment income (loss) A,B
 
1.315
 
.539
 
.470
 
1.039
 
1.344
     Net realized and unrealized gain (loss)
 
(.351)
 
(3.868)
 
(.044)
 
1.495
 
1.687
  Total from investment operations
 
.964  
 
(3.329)  
 
.426  
 
2.534  
 
3.031
  Distributions from net investment income
 
(1.364)
 
(.561)
 
(.486) C
 
(1.084)
 
(1.381)
  Distributions from net realized gain
 
-
 
-
 
(.020) C
 
-
 
-
     Total distributions
 
(1.364)
 
(.561)
 
(.506)
 
(1.084)
 
(1.381)
  Net asset value, end of period
$
48.15
$
48.55
$
52.44
$
52.52
$
51.07
 Total Return D,E
 
2.02%
 
(6.38)%
 
.83%
 
5.04%
 
6.22%
 Ratios to Average Net Assets B,F,G
 
 
 
 
 
 
 
 
 
 
    Expenses before reductions
 
.32%
 
.36%
 
.36%
 
.36%
 
.36%
    Expenses net of fee waivers, if any
 
.32%
 
.36%
 
.36%
 
.36%
 
.36%
    Expenses net of all reductions
 
.32%
 
.36%
 
.36%
 
.36%
 
.36%
    Net investment income (loss)
 
2.73%
 
1.07%
 
.90%
 
2.02%
 
2.69%
 Supplemental Data
 
 
 
 
 
 
 
 
 
 
    Net assets, end of period (000 omitted)
$
175,732
$
240,324
$
283,197
$
181,184
$
127,663
    Portfolio turnover rate H,I
 
59%
 
38%
 
75%
 
102%
 
32%
 
ACalculated based on average shares outstanding during the period.
 
BNet investment income (loss) is affected by the timing of the declaration of dividends by any underlying mutual funds or exchange-traded funds (ETFs). Net investment income (loss) of any mutual funds or ETFs is not included in the Fund's net investment income (loss) ratio.
 
CThe amount shown reflects reclassifications related to book to tax differences that were made in the year shown.
 
DTotal returns would have been lower if certain expenses had not been reduced during the applicable periods shown.
 
EBased on net asset value.
 
FFees and expenses of any underlying mutual funds or exchange-traded funds (ETFs) are not included in the Fund's expense ratio. The Fund indirectly bears its proportionate share of these expenses. For additional expense information related to investments in Fidelity Central Funds, please refer to the "Investments in Fidelity Central Funds" note found in the Notes to Financial Statements section of the most recent Annual or Semi-Annual report.
 
GExpense ratios reflect operating expenses of the class. Expenses before reductions do not reflect amounts reimbursed, waived, or reduced through arrangements with the investment adviser, brokerage services, or other offset arrangements, if applicable, and do not represent the amount paid by the class during periods when reimbursements, waivers or reductions occur.
 
HAmount does not include the portfolio activity of any underlying mutual funds or exchange-traded funds (ETFs).
 
IPortfolio turnover rate excludes securities received or delivered in-kind.
 
 
Fidelity® Total Bond ETF
 
Years ended August 31,
 
2023  
 
2022 
 
2021  
 
2020 
 
2019 
  Selected Per-Share Data 
 
 
 
 
 
 
 
 
 
 
  Net asset value, beginning of period
$
46.49
$
53.63
$
54.71
$
51.95
$
48.80
  Income from Investment Operations
 
 
 
 
 
 
 
 
 
 
     Net investment income (loss) A,B
 
1.935
 
1.120
 
.988
 
1.323
 
1.502
     Net realized and unrealized gain (loss)
 
(1.858)
 
(7.137)
 
.023
 
2.812
 
3.147
  Total from investment operations
 
.077  
 
(6.017)  
 
1.011  
 
4.135  
 
4.649
  Distributions from net investment income
 
(1.847)
 
(1.123)
 
(.951) C
 
(1.375)
 
(1.499)
  Distributions from net realized gain
 
-
 
-
 
(1.143) C
 
-
 
-
     Total distributions
 
(1.847)
 
(1.123)
 
(2.094)
 
(1.375)
 
(1.499)
  Net asset value, end of period
$
44.72
$
46.49
$
53.63
$
54.71
$
51.95
 Total Return D,E
 
.20%
 
(11.32)%
 
1.90%
 
8.10%
 
9.73%
 Ratios to Average Net Assets B,F,G
 
 
 
 
 
 
 
 
 
 
    Expenses before reductions
 
.36%
 
.36%
 
.36%
 
.36%
 
.36%
    Expenses net of fee waivers, if any
 
.36%
 
.36%
 
.36%
 
.36%
 
.36%
    Expenses net of all reductions
 
.36%
 
.36%
 
.36%
 
.36%
 
.36%
    Net investment income (loss)
 
4.29%
 
2.24%
 
1.84%
 
2.51%
 
3.01%
 Supplemental Data
 
 
 
 
 
 
 
 
 
 
    Net assets, end of period (000 omitted)
$
4,731,167
$
2,289,659
$
2,048,646
$
1,365,222
$
761,195
    Portfolio turnover rate H,I
 
233%
 
48%
 
117%
 
112%
 
150%
 
ACalculated based on average shares outstanding during the period.
 
BNet investment income (loss) is affected by the timing of the declaration of dividends by any underlying mutual funds or exchange-traded funds (ETFs). Net investment income (loss) of any mutual funds or ETFs is not included in the Fund's net investment income (loss) ratio.
 
CThe amount shown reflects reclassifications related to book to tax differences that were made in the year shown.
 
DBased on net asset value.
 
ETotal returns would have been lower if certain expenses had not been reduced during the applicable periods shown.
 
FFees and expenses of any underlying mutual funds or exchange-traded funds (ETFs) are not included in the Fund's expense ratio. The Fund indirectly bears its proportionate share of these expenses.
 
GExpense ratios reflect operating expenses of the class. Expenses before reductions do not reflect amounts reimbursed, waived, or reduced through arrangements with the investment adviser, brokerage services, or other offset arrangements, if applicable, and do not represent the amount paid by the class during periods when reimbursements, waivers or reductions occur.
 
HPortfolio turnover rate excludes securities received or delivered in-kind.
 
IAmount does not include the portfolio activity of any underlying mutual funds or exchange-traded funds (ETFs).
 
 
Additional Index Information
 
Bloomberg U.S. 1-5 Year Government/Credit Bond Index is a market value-weighted index of fixed-rate investment-grade debt securities with maturities from one to five years from the U.S. Treasury, U.S. Government-Related, and U.S. Corporate Indexes.
Bloomberg U.S. Aggregate Bond Index is a broad-based, flagship benchmark that measures the investment grade, US dollar-denominated, fixed-rate taxable bond market. The index includes Treasuries, government-related and corporate securities, mortgage-back securities (agency fixed-rate pass-throughs), asset-backed securities and collateralised mortgage-backed securities (agency and non-agency).
Bloomberg U.S. Credit Bond Index is a market value-weighted index of investment-grade corporate fixed-rate debt issues with maturities of one year or more.
Bloomberg U.S. Securitized Index is a market value-weighted index of agency mortgage-backed pass-through securities with a weighted average maturity of at least one year.
Bloomberg U.S. Universal Bond Index represents the union of the Bloomberg U.S. Aggregate Bond Index, the Bloomberg U.S. Corporate High Yield Bond Index, the Bloomberg 144A Bond Index, the Bloomberg Eurodollar Bond Index, the Bloomberg Emerging Markets Aggregate USD Bond Index, and the non-ERISA portion of the Bloomberg U.S. CMBS Index. Municipal debt, private placements, and non-dollar-denominated issues are excluded from the index. The only constituent of the index that includes floating-rate debt is the Bloomberg Emerging Markets Aggregate USD Bond Index.
Fidelity Limited Term Composite IndexSM is a customized blend of unmanaged indexes, weighted as follows: Bloomberg U.S. 1-5 Year Credit Bond Index - 80%; and Bloomberg U.S. 1-5 Year Government Bond Index - 20%.
 
You can obtain additional information about the funds. A description of each fund's policies and procedures for disclosing its holdings is available in its Statement of Additional Information (SAI) and on Fidelity's web sites. Each fund's SAI also includes more detailed information about the fund and its investments. The  SAIs  are incorporated herein by reference (legally form a part of the prospectus). Each fund's annual and semi-annual reports also include additional information. Each fund's annual report includes a discussion of the fund's holdings and recent market conditions and the fund's investment strategies that affected performance.
For a free copy of any of these documents or to request other information or ask questions about a fund, call Fidelity at 1-800-FIDELITY. In addition, you may visit Fidelity's web site at www.fidelity.com for a free copy of a prospectus, SAI, or annual or semi-annual report or to request other information.
The SAIs, the funds' annual and semi-annual reports and other related materials are available from the Electronic Data Gathering, Analysis, and Retrieval (EDGAR) Database on the SEC's web site (http://www.sec.gov). You can obtain copies of this information, after paying a duplicating fee, by sending a request by e-mail to [email protected] or by writing the Public Reference Section of the SEC, Washington, D.C. 20549-1520. You can also review and copy information about the funds, including the funds' SAIs, at the SEC's Public Reference Room in Washington, D.C. Call 1-202-551-8090 for information on the operation of the SEC's Public Reference Room.
Investment Company Act of 1940, File Number(s), 811-22796  
Fidelity Distributors Company LLC (FDC) is a member of the Securities Investor Protection Corporation (SIPC). You may obtain information about SIPC, including the SIPC brochure, by visiting www.sipc.org or calling SIPC at 202-371-8300.
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