ebs-20211230.htm

Fund/Ticker

Fidelity Low Duration Bond Factor ETF/FLDR

Principal U.S. Listing Exchange: Cboe BZX Exchange, Inc.

Prospectus

December 30, 2021





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.

Fidelity Investments

245 Summer Street, Boston, MA 02210





Contents

Fund Summary

 
 

Fidelity® Low Duration Bond Factor 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® Low Duration Bond Factor ETF

Investment Objective

The fund seeks to provide investment returns that correspond, before fees and expenses, generally to the performance of the Fidelity Low Duration Investment Grade Factor Index℠.

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   0.15%
Distribution and/or Service (12b-1) fees   None
Other expenses   0.00%
Total annual operating expenses   0.15%


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 your shareholder 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 $15
3 years $48
5 years $85
10 years $192


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 40% of the average value of its portfolio.

Principal Investment Strategies

  • Normally investing at least 80% of assets in securities included in the Fidelity Low Duration Investment Grade Factor Index℠. The index is designed to optimize the balance of interest rate risk and credit risk such that both returns and risk measures may be improved relative to traditional U.S. investment grade floating rate note indices. The index is comprised solely of U.S. investment grade floating rate notes and U.S. Treasury notes.
  • Normally maintaining a duration of 1 year or less.
  • Using statistical sampling techniques based on duration, maturity, interest rate sensitivity, security structure, and credit quality to attempt to replicate the returns of the Fidelity Low Duration Investment Grade Factor Index℠ using a smaller number of securities.
  • Lending securities to earn income for the fund.

Principal Investment Risks

  • Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.
  • Floating Rate Notes. Securities with floating interest rates can be less sensitive to interest rate changes than securities with fixed interest rates, but may decline in value if their interest rates do not rise as much, or as quickly, as interest rates in general. Floating rate notes typically carry lower yields than fixed rate notes of the same maturity.
  • Financial Services Concentration. Changes in government regulation and interest rates and economic downturns can have a significant negative effect on issuers in the financial services sector, including the price of their securities or their ability to meet their payment obligations.
  • 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.
  • 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. 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.
  • Correlation to Index. The performance of the fund and its underlying index may vary somewhat due to factors such as fees and expenses of the fund, transaction costs, sample selection, regulatory restrictions, and timing differences associated with additions to and deletions from the index. Errors in the construction or calculation of the index may occur from time to time and may not be identified and corrected for some period of time, which may have an adverse impact on the fund and its shareholders.
  • Passive Management Risk. The fund is managed with a passive investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the fund's index or of the actual securities included in the index. This differs from an actively managed fund, which typically seeks to outperform a benchmark index. As a result, the fund's performance could be lower than actively managed funds that may shift their portfolio assets to take advantage of market opportunities or lessen the impact of a market decline or a decline in the value of one or more issuers. The fund will be concentrated to approximately the same extent that the fund's index concentrates in the securities of issuers in a particular industry.
  • Factor-Based Strategy Risk. Although the fund’s underlying index uses a rules-based proprietary index methodology that seeks to optimize the balance of certain risks, there is no guarantee that this methodology will be successful.
  • 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.
  • 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. Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in the fund will fluctuate. You could lose money by investing in the fund.

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

Image

During the periods shown in the chart: Returns Quarter ended
Highest Quarter Return 3.56% June 30, 2020
Lowest Quarter Return (2.20)% March 31, 2020
Year-to-Date Return 0.05% September 30, 2021


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, 2020 Past 1 year Life of fund(a)
Fidelity® Low Duration Bond Factor ETF
Return Before Taxes 1.98% 2.88%
Return After Taxes on Distributions 1.47% 2.01%
Return After Taxes on Distributions and Sale of Fund Shares 1.17% 1.83%
Fidelity Low Duration Investment Grade Factor Index℠
(reflects no deduction for fees, expenses, or taxes)
2.33% 3.14%
Bloomberg US Treasury Bill: 6-9 Months Index
(reflects no deduction for fees, expenses, or taxes)
1.20% 1.96%


(a)From June 12, 2018

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)

Brandon Bettencourt (co-manager) has managed the fund since June 2018.

Richard Munclinger (co-manager) has managed the fund since October 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 Basics

Investment Details

Investment Objective

Fidelity® Low Duration Bond Factor ETF seeks to provide investment returns that correspond, before fees and expenses, generally to the performance of the Fidelity Low Duration Investment Grade Factor Index℠.

Principal Investment Strategies

The Adviser normally invests at least 80% of the fund’s assets in securities included in the Fidelity Low Duration Investment Grade Factor Index℠. The index is designed to optimize the balance of interest rate risk and credit risk, such that both returns and risk measures may be improved relative to traditional U.S. investment grade floating rate note indices.

The universe of securities is intended to reflect a blend of two components: U.S. corporate floating rate notes with less than 5 years maturity and U.S. Treasury Notes with 7 to 10 years maturity.

The fund may not always hold all of the same securities as the Fidelity Low Duration Investment Grade Factor Index℠. The Adviser may use statistical sampling techniques to attempt to replicate the returns of the index using a smaller number of securities. Statistical sampling techniques attempt to match the investment characteristics of the index and the fund by taking into account such factors as duration, maturity, interest rate sensitivity, security structure, and credit quality.

The fund may not track the Fidelity Low Duration Investment Grade Factor Index℠ because differences between the index and the fund's portfolio can cause differences in performance. In addition, expenses and transaction costs, the size and frequency of cash flows into and out of the fund, and differences between how and when the fund and the index are valued can cause differences in performance.

The fund may lend securities to broker-dealers or other institutions to earn income.

The fund normally maintains a duration of 1 year or less. Duration is a measure of a bond's price sensitivity to a change in interest rates. For example, if a bond has a 1-year duration and interest rates rise 1%, the bond's value is likely to fall about 1%. Similarly, if a bond fund has a 1-year duration and interest rates rise 1%, the fund's value is likely to fall about 1%.

The fund will invest more than 25% of its total assets in securities of issuers in a particular industry to approximately the same extent that the fund's index concentrates in the securities of issuers in a particular industry.

If the Adviser's strategies do not work as intended, the fund may not achieve its objective.

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. Floating rate notes are debt securities with interest rates that reset or adjust periodically by reference to a benchmark interest rate. Debt securities include corporate bonds, government securities (including Treasury securities), repurchase agreements, money market securities, mortgage and other asset-backed securities, 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. U.S. Government securities include mortgage and other asset-backed securities.

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).

Principal Investment Risks

Many factors affect the 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. The 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. The 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 the 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 the fund.

The following factors can significantly affect the 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 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. The discontinuation and replacement of London Interbank Offered Rate (LIBOR) (an indicative measure of the average interest rate at which major global banks could borrow from one another) and other benchmark rates may have a significant impact on the financial markets and may adversely impact a fund’s performance.

Floating Rate Notes. Securities with floating interest rates can be less sensitive to interest rate changes than securities with fixed interest rates, but may decline in value if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, floating rate securities typically will not increase in value if interest rates decline. A decline in interest rates may result in a reduction in income received from floating rate notes held by the fund and may adversely affect the fund’s NAV. Securities with longer durations tend to be more sensitive to interest rate changes and thus are usually more volatile than securities with shorter durations.

Financial Services Concentration. Financial services companies are highly dependent on the supply of short-term financing and can be sensitive to changes in government regulation and interest rates and to economic downturns in the United States and abroad. These events can significantly affect the price of issuers’ securities as well as their ability to make payments of principal or interest or otherwise meet obligations on securities or instruments for which they serve as guarantors or counterparties.

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 (e.g., broker-dealer or other borrower in a securities lending transaction), 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. 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.

Fluctuation of Net Asset Value and Share Price. The NAV of the fund's shares will generally fluctuate with changes in the market value of the fund's holdings. The 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 the 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 the 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. 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.

Correlation to Index. The performance of the fund and its index may vary somewhat due to factors such as fees and expenses of the fund, transaction costs, imperfect correlation between the fund's securities and those in the index, timing differences associated with additions to and deletions from the index, and changes in the shares outstanding of the component securities. The fund may not be fully invested at times as a result of cash flows into the fund. The use of sampling techniques or futures or other derivative positions may affect the fund's ability to achieve close correlation with the index. In addition, the fund may not be able to invest in certain securities included in the index or invest in them in the exact proportions in which they are represented in the index due to regulatory restrictions. Errors in the construction or calculation of the index may occur from time to time and may not be identified and corrected for some period of time, which may have an adverse impact on the fund and its shareholders.

Passive Management Risk. An index fund is managed with a passive investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the fund's index or of the actual securities included in the index. This differs from an actively managed fund, which typically seeks to outperform a benchmark index. As a result, an index fund's performance could be lower than actively managed funds that may shift their portfolio assets to take advantage of market opportunities or lessen the impact of a market decline or a decline in the value of one or more issuers. The structure and composition of an index fund's index will affect the performance, volatility, and risk of the index and, consequently, the performance, volatility, and risk of the fund. The fund will be concentrated to approximately the same extent that the fund's index concentrates in the securities of issuers in a particular industry.

Factor-Based Strategy Risk. Although the index uses a rules-based proprietary index methodology that seeks to optimize the balance of certain risks, there is no guarantee that this methodology will be successful. In addition, there may be periods when a particular factor is out of favor and therefore, during such periods, the investment performance of the fund may suffer.

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 the fund. The fund has a limited number of intermediaries that act as Authorized Participants. There are no obligations of market makers to make a market in the 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 the 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 the fund. FDC, the distributor of the fund's shares, does not maintain a secondary market in the shares.

If the 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 the 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. Assets segregated to cover these transactions may decline in value and are not available to meet redemptions. 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, the 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.

Other Investment Strategies

In addition to the principal investment strategies discussed above, the Adviser may also use various techniques, such as buying and selling futures contracts, swaps, and exchange traded funds, 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.

The Fidelity Low Duration Investment Grade Factor Index℠ is constructed using Fidelity's rules-based proprietary index methodology. The weight of each component in the blend is set to target a duration, which seeks to optimize the balance of credit risk and interest rate risk. The final weights of securities within the corporate floating rate notes component are determined by their market capitalization, subject to an issuer cap of 3.5%.

The Fidelity Low Duration Investment Grade Factor Index℠ is rebalanced monthly.

Shareholder Notice

The following is subject to change only upon 60 days' prior notice to shareholders:

Fidelity® Low Duration Bond Factor ETF normally invests at least 80% of its assets in securities included in the Fidelity Low Duration Investment Grade Factor Index℠.

Valuing Shares

The 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. The 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 the 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 the 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 the 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 the fund's assets may not occur on days when the fund is open for business.

Shares of open-end funds in which the 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, the fund's distributor.

Buying and Selling Shares in the Secondary Market

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. The fund does not impose any minimum investment for shares of the fund purchased on an exchange. These transactions are made at market prices that may vary throughout the day and may be greater than the fund's NAV (premium) or less than the 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.

The fund is designed to offer investors an investment that can be bought and sold frequently in the secondary market without impact on the 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 the fund at NAV only by Authorized Participants in large increments called "Creation Units." The 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. The fund reserves the right, but does not have the obligation, to reject any purchase or redemption transaction at any time. In addition, the fund reserves the right to impose restrictions on disruptive, excessive, or short-term trading.

Precautionary Notes

For example, you may be deemed a statutory underwriter if you purchase Creation Units from the 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 the 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 the fund may purchase and resell fund shares pursuant to this prospectus.

Costs Associated with Creations and Redemptions

The fund 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

The fund earns interest, dividends, and other income from its investments, and distributes this income (less expenses) to shareholders as dividends. The 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.

The fund normally pays dividends monthly and capital gain distributions in December.

Tax Consequences

As with any investment, your investment in the fund could have tax consequences for you. If you are not investing through a tax-advantaged retirement account, you should consider these tax consequences.

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 the fund's income is primarily derived from interest, dividends from the fund generally will not qualify for the long-term capital gains tax rates available to individuals.

The 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 the 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. The 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 investors receive will normally be taxable to them when they receive them.

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 the fund's manager. The address of the Adviser is 245 Summer Street, Boston, Massachusetts 02210.

As of December 31, 2020, the Adviser had approximately $3.0 trillion in discretionary assets under management, and approximately $3.8 trillion when combined with all of its affiliates' assets under management.

As the manager, the Adviser has overall responsibility for directing the 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 the fund. As of December 31, 2020, FMR UK had approximately $25.4 billion in discretionary assets under management. FMR UK may provide investment research and advice on issuers based outside the United States and may also provide investment advisory services for the fund. FMR UK is an affiliate of the Adviser.

Fidelity Management & Research (Hong Kong) Limited (FMR H.K.), at Floor 19, 41 Connaught Road Central, Hong Kong, serves as a sub-adviser for the fund. As of December 31, 2020, FMR H.K. had approximately $22.3 billion in discretionary assets under management. FMR H.K. may provide investment research and advice on issuers based outside the United States and may also provide investment advisory services for the fund. FMR H.K. is an affiliate of the Adviser.

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 the fund. As of March 31, 2021, FMR Japan had approximately $7.8 billion in discretionary assets under management. FMR Japan may provide investment research and advice on issuers based outside the United States and may also provide investment advisory services for the fund. FMR Japan is an affiliate of the Adviser.

Portfolio Manager(s)

Brandon Bettencourt is co-manager of the fund, which he has managed since June 2018. He also manages other funds. Since joining Fidelity Investments in 2008, Mr. Bettencourt has worked as a research associate, portfolio analyst, and portfolio manager.

Richard Munclinger is co-manager of the fund, which he has managed since October 2020. He also manages other funds. Since joining Fidelity Investments in 2016, Mr. Munclinger has worked as a quantitative 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 Fidelity® fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any Fidelity® fund.

Advisory Fee(s)

The 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 the fund with limited exceptions.

The fund's annual management fee rate is 0.15% of its average net assets.

The Adviser pays FMR UK, FMR H.K., and FMR Japan for providing sub-advisory services.

The basis for the Board of Trustees approving the management contract and sub-advisory agreements for the fund is available in the fund's semi-annual report for the fiscal period ended February 28, 2021.

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.

Fund Distribution

FDC distributes the 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 the fund will not make direct payments for distribution or shareholder support services, the fund has adopted a Distribution and Service Plan pursuant to Rule 12b-1 under the 1940 Act with respect to its shares. The 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 the 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 the fund has authorized such payments for shares of the fund.

If payments made by the Adviser to FDC or to intermediaries under the Distribution and Service Plan were considered to be paid out of the 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 fund or FDC. This prospectus and the related SAI do not constitute an offer by the fund or by FDC to sell shares of the fund to or to buy shares of the fund from any person to whom it is unlawful to make such offer.

Other Service Providers

State Street Bank and Trust Company serves as the 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.

Financial Highlights — Fidelity Low Duration Bond Factor ETF

  Year ended
August 31, 2021
Year ended
August 31, 2020
Year ended
August 31, 2019
Year ended
August 31, 2018A
Selected Per-Share Data        
Net asset value, beginning of period $ 50.99 $ 50.71 $ 50.10 $ 50.00
Income from Investment Operations        
Net investment income (loss)B 0.275 0.913 1.479 0.279
Net realized and unrealized gain (loss) (0.085) 0.325 0.469 0.096
Total from investment operations 0.190 1.238 1.948 0.375
Distributions from net investment income (0.270) (0.958) (1.338) (0.275)
Total distributions (0.270) (0.958) (1.338) (0.275)
Net asset value, end of period $ 50.91 $ 50.99 $ 50.71 $ 50.10
Total ReturnC,D,E 0.36% 2.48% 3.95% 0.75%
Ratios to Average Net AssetsF,G        
Expenses before reductions .15% .15% .15% .15%H
Expenses net of fee waivers, if any .15% .15% .15% .15%H
Expenses net of all reductions .15% .15% .15% .15%H
Net investment income (loss) .54% 1.81% 2.90% 2.51%H
Supplemental Data        
Net assets, end of period (000 omitted) $235,442 $191,216 $109,024 $10,020
Portfolio turnover rateI 40% 43%J 14% 2%K


AFor the period June 12, 2018 (commencement of operations) to August 31, 2018.

BCalculated based on average shares outstanding during the period.

CBased on net asset value.

DTotal returns for periods of less than one year are not annualized.

ETotal returns would have been lower if certain expenses had not been reduced during the applicable periods shown.

FExpense ratios reflect operating expenses of the class. Expenses before reductions do not reflect amounts reimbursed, waived, or reduced through arrangements with the investment advisor, 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.

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. 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.

HAnnualized.

IAmount does not include the portfolio activity of any underlying mutual funds or exchange-traded funds (ETFs).

JPortfolio turnover rate excludes securities received or delivered in-kind.

KAmount not annualized.

Additional Index Information

The Fidelity Low Duration Investment Grade Factor Index℠ is designed to optimize the balance of interest rate risk and credit risk such that both returns and risk measures may be improved relative to traditional U.S. investment grade floating rate note indices.

Bloomberg US Treasury Bill: 6-9 Months Index is a market value-weighted index of investment-grade fixed-rate public obligations of the U.S. Treasury with maturities between six and nine months.

The Fidelity index listed above was created by Fidelity Product Services LLC (FPS) using a rules-based proprietary index methodology described for the fund under the heading "Other Investment Strategies" in the "Fund Basics - Investment Details" section of this prospectus.

The fund is entitled to use its index pursuant to a licensing arrangement with FPS.

The fund and the Adviser have each adopted policies and procedures designed to minimize potential conflicts of interest in connection with the management of the fund.

Additional information regarding the index is available on www.fidelity.com.

BLOOMBERG is a trademark and service mark of Bloomberg Finance L.P. or its affiliates. Bloomberg Finance L.P. and its affiliates (collectively, “Bloomberg”) are not affiliated with FPS (“Client”). Bloomberg’s association with Client is to act as the calculation agent of The Fidelity Low Duration Investment Grade Factor Index℠, which is the property of Client. Bloomberg does not guarantee the timeliness, accuracy, or completeness of any data or information relating to the Index. Bloomberg makes no warranty, express or implied, as to the Index, any data or values relating thereto or any financial product or instrument linked to, using as a component thereof or based on the Index (“Products”) or results to be obtained therefrom, and expressly disclaims all warranties of merchantability and fitness for a particular purpose with respect thereto. To the maximum extent allowed by law, Bloomberg, its licensors, and its and their respective employees, contractors, agents, suppliers, and vendors shall have no liability or responsibility whatsoever for any injury or damages—whether direct, indirect, consequential, incidental, punitive, or otherwise—arising in connection with the Index, any data or values relating thereto or any Products—whether arising from their negligence or otherwise.

FPS is the index provider. FPS is an affiliated person of the fund's investment adviser and as such is an affiliated index provider. FPS makes no representation or warranty, express or implied, to the owners of shares of the fund or any member of the public regarding the advisability of investing in securities generally or in the fund particularly or the ability of the fund to track the index or of the ability of the index to operate as designed. FPS has no obligation to take the needs of the funds or the owners of shares of the funds into consideration in determining, composing, or calculating the index. FPS does not make any express or implied warranties, and expressly disclaims all warranties of merchantability or fitness for a particular purpose or use with respect to the index or any data included therein. FPS does not guarantee the accuracy, completeness, or performance of the index or the data included therein and shall have no liability in connection with the index or index calculation, errors, omissions or interruptions of any Fidelity index or any data included therein. FPS has contracted with an independent calculation agent to calculate the index. Without limiting any of the foregoing, in no event shall FPS have any liability for any special, punitive, direct, indirect or consequential damages (including lost profits) arising out of matters relating to the use of the index, even if notified of the possibility of such damages.




You can obtain additional information about the fund. A description of the fund's policies and procedures for disclosing its holdings is available in its SAI and on Fidelity's web sites. The SAI also includes more detailed information about the fund and its investments. The SAI is incorporated herein by reference (legally forms a part of the prospectus). The fund's annual and semi-annual reports also include additional information. The 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 the 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 SAI, the fund's 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 publicinfo@sec.gov or by writing the Public Reference Section of the SEC, Washington, D.C. 20549-1520. You can also review and copy information about the fund, including the fund's SAI, 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

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.

Fidelity Investments & Pyramid Design and Fidelity are registered service marks of FMR LLC. © 2021 FMR LLC. All rights reserved.

Fidelity Low Duration Investment Grade Factor Index is a service mark of FMR LLC.

Any third-party marks that may appear above are the marks of their respective owners.


1.9887640.105 LDE-PRO-1221