Prospectus - Investment Objective
Fund /Ticker
Fidelity® SAI Municipal Money Market Fund /FMQXX
Offered exclusively to certain clients of the Adviser, or its affiliates, including Strategic Advisers LLC (Strategic Advisers) - not available for sale to the general public. Fidelity ® SAI is a product name of Fidelity ® funds dedicated to certain programs affiliated with Strategic Advisers.
Prospectus
May 30, 2023
Like securities of all mutual funds, 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® SAI Municipal Money Market Fund

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

Appendix

Financial Highlights

Fund Summary

Fund:
Fidelity® SAI Municipal Money Market Fund
Investment Objective
Fidelity® SAI Municipal Money Market Fund seeks as high a level of interest income exempt from federal income tax as is consistent with liquidity and stability of principal.
Fee Table
The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.
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
0.14 %   
Distribution and/or Service (12b-1) fees
None   
Other expenses
0.02 %   
Total annual operating expenses
0.16 %   
Fee waiver and/or expense reimbursement
0.02 %   A
Total annual operating expenses after fee waiver and/or expense reimbursement
0.14 %   
A Fidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse the fund to the extent that total operating expenses (excluding interest, certain taxes, fees and expenses of the Independent Trustees, proxy and shareholder meeting expenses, extraordinary expenses, and acquired fund fees and expenses (including fees and expenses associated with a wholly owned subsidiary), if any, as well as non-operating expenses such as brokerage commissions and fees and expenses associated with the fund's securities lending program, if applicable), as a percentage of its average net assets, exceed 0.14% (the Expense Cap). If at any time during the current fiscal year expenses for the fund fall below the Expense Cap, FMR reserves the right to recoup through the end of the fiscal year any expenses that were reimbursed during the current fiscal year up to, but not in excess of, the Expense Cap. This arrangement will remain in effect through July 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
$
14
3 years
$
49
5 years
$
88
10 years
$
202
Principal Investment Strategies
  • Normally investing in municipal money market securities.
  • Normally investing at least 80% of assets in municipal securities whose interest is exempt from federal income tax (but may be subject to the federal alternative minimum tax).
  • Potentially investing up to 20% of assets in securities subject to state and/or federal income tax.
  • Potentially investing more than 25% of total assets in municipal securities that finance similar types of projects.
  • Investing in compliance with industry-standard regulatory requirements for money market funds for the quality, maturity, liquidity, and diversification of investments.
Although the fund is a money market fund, it will price and transact at a "floating" net asset value per share (NAV) that will fluctuate based on changes in the value of the fund's investments.
Principal Investment Risks
  • Municipal Market Volatility.
The municipal market is volatile and can be significantly affected by adverse tax, legislative, or political changes and the financial condition of the issuers of municipal securities.
  • Interest Rate Changes.
Interest rate increases can cause the price of a money market security to decrease.
  • Income Risk.
A low or negative interest rate environment can adversely affect the fund's yield.
  • Floating NAV.
The fund does not maintain a constant NAV per share of $1.00. The value of the fund's shares will be calculated to four decimal places and will vary as a result of changes in the value of the securities in which the fund invests.
  • Foreign Exposure.
Entities providing credit support or a maturity-shortening structure that are located in foreign countries can be affected by adverse political, regulatory, market, or economic developments in those countries .
  • Issuer-Specific Changes.
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 money market security to decrease.
You could lose money by investing in the fund .   Because the share price of the fund will fluctuate, when you sell your shares they may be worth more or less than what you originally paid for them.   T he fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the fund's liquidity falls below required minimums because of market conditions or other factors .     An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency .   Fidelity Investments and its affiliates, the fund's sponsor, have no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time.
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.   Past performance is not an indication of future performance.
Visit www.fidelity.com for more recent performance information.
 
Year-by-Year Returns
 
 
 
 
 
 
 
 
2019
2020
2021
2022
 
1.44 %
 
0.53 %
 
0.02 %
 
1.10 %
 
During the periods shown in the chart:
Returns
Quarter ended
   Highest Quarter Return
0.62 %
December 31, 2022
   Lowest Quarter Return
- 0.02 %
March 31, 2022
   Year-to-Date Return
0.73 %
March 31, 2023
 
Average Annual Returns
 
 
For the periods ended December 31, 2022
Past 1
year
Life of
fund   A
Fidelity® SAI Municipal Money Market Fund
1.10 %
0.89 %
 
 
 
A From January 11, 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.
Purchase and Sale of Shares
The fund is an institutional money market fund, which means that the NAV of the fund's shares will "float," fluctuating with changes in the values of the fund's portfolio securities. The fund may impose a fee upon the sale of fund shares or may temporarily suspend the ability to sell shares if the fund's liquidity falls below required minimums because of market conditions or other factors.
NOT AVAILABLE FOR SALE TO THE GENERAL PUBLIC.
Shares are offered exclusively to certain clients of the Adviser or its affiliates.
The price to buy one share is its NAV. Shares will be bought at the NAV next calculated after an order is received in proper form.
The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form.
The fund is open for business each day the New York Stock Exchange (NYSE) is open.
Even if the NYSE is closed, the fund will be open for business on those days on which the Federal Reserve Bank of New York (New York Fed) is open, the primary trading markets for the fund's portfolio instruments are open, and the fund's management believes there is an adequate market to meet purchase and redemption requests.
Fidelity normally calculates Fidelity® SAI Municipal Money Market Fund's NAV each business day as of 4:00 p.m. Eastern time.
The fund's assets normally are valued as of this time for the purpose of computing NAV.
There is no purchase minimum for fund shares.
Tax Information
The fund seeks to earn income and pay dividends exempt from federal income tax. Income exempt from federal income tax may be subject to state or local tax. A portion of the dividends you receive may be subject to federal and state income taxes and may also be subject to the federal alternative minimum tax. You may also receive taxable distributions attributable to the fund's sale of municipal bonds.
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® SAI Municipal Money Market Fund seeks as high a level of interest income exempt from federal income tax as is consistent with liquidity and stability of principal.
Principal Investment Strategies
The Adviser normally invests the fund's assets in municipal money market securities.
The Adviser normally invests at least 80% of the fund's assets in municipal securities whose interest is exempt from federal income tax. The Adviser may invest all of the fund's assets in municipal securities whose interest is subject to the federal alternative minimum tax.
The supply of and demand for municipal money market securities can vary from time to time. When the Adviser believes that suitable municipal money market securities are not available, or during other unusual market conditions, the Adviser may leave a significant portion of the fund's assets uninvested, or may invest up to 20% of the fund's assets in securities subject to state and/or federal income tax.
The Adviser may invest more than 25% of the fund's total assets in municipal securities that finance similar projects, such as those relating to education, health care, transportation, and utilities.
In buying and selling securities for the fund, the Adviser complies with industry-standard regulatory requirements for money market funds regarding the quality, maturity, liquidity, and diversification of the fund's investments. The Adviser may invest the fund's assets in municipal money market securities by investing in other funds. Although the fund is a money market fund, it will price and transact at a "floating" NAV that will fluctuate based on changes in the value of the fund's investments.
Description of Principal Security Types
Money market securities are high-quality, short-term securities that pay a fixed, variable, or floating interest rate. Securities are often specifically structured so that they are eligible investments for a money market fund. For example, in order to satisfy the maturity restrictions for a money market fund, some money market securities have demand or put features, which have the effect of shortening the security's maturity. Municipal money market securities include variable rate demand notes, commercial paper, and municipal notes.
Municipal securities are issued to raise money for a variety of public and private purposes, including general financing for state and local governments, or financing for a specific project or public facility. Municipal securities may be fully or partially backed by the local government, by the credit of a private issuer, by the current or anticipated revenues from a specific project or specific assets, or by domestic or foreign entities providing credit support such as letters of credit, guarantees, or insurance.
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 yield will change daily based on changes in interest rates and other market conditions. For example, a major increase in interest rates or a decrease in the credit quality of the issuer of one of the fund's investments could cause the fund's share price to decrease.
The following factors can significantly affect the fund's performance:
Municipal Market Volatility.   Municipal securities can be significantly affected by political changes as well as uncertainties in the municipal market related to taxation, legislative changes, or the rights of municipal security holders. Because many municipal securities are issued to finance similar projects, especially those relating to education, health care, transportation, and utilities, conditions in those sectors can affect the overall municipal market. Budgetary constraints of local, state, and federal governments upon which the issuers may be relying for funding may also impact municipal securities. In addition, changes in the financial condition of an individual municipal insurer can affect the overall municipal market, and market conditions may directly impact the liquidity and valuation of municipal securities.
Interest Rate Changes. Money market securities have varying levels of sensitivity to changes in interest rates. In general, the price of a money market security can fall when interest rates rise and can rise when interest rates fall. Certain types of securities, such as securities with longer maturities, can be more sensitive to interest rate changes. Short- term securities tend to react to changes in short- term interest rates. Some countries experience low or negative interest rates from time to time, which may magnify interest rate risk for the market as a whole and for a fund. 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. 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.
Income Risk. The fund's income, or yield, is based on short-term interest rates, which can fluctuate significantly over short periods. A low or negative interest rate environment can adversely affect the fund's yield and, depending on its duration and severity, could prevent the fund from providing a positive yield. In addition, the fund's yield will vary as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates.
Foreign Exposure. Entities providing credit support or a maturity-shortening structure that are located in foreign countries can involve increased risks. Extensive public information about the provider may not be available and unfavorable political, economic, or governmental developments could affect the value of the security.
Global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact providers in a different country or region.
Floating NAV. The fund does not maintain a constant NAV per share of $1. 00. The fund's NAV will be calculated to four decimal places and will vary as a result of changes in the value of the securities in which the fund invests.
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 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. Municipal securities backed by current or anticipated revenues from a specific project or specific assets can be negatively affected by the discontinuance of the taxation supporting the project or assets or the inability to collect revenues for the project or from the assets. If the Internal Revenue Service (IRS) determines an issuer of a municipal security has not complied with applicable tax requirements, interest from the security could become taxable and the security could decline significantly in value.
Generally, the fund purchases municipal securities whose interest, in the opinion of bond counsel, is free from federal income tax. Neither the Adviser nor the fund guarantees that this opinion is correct, and there is no assurance that the IRS will agree with bond counsel's opinion. Issuers or other parties generally enter into covenants requiring continuing compliance with federal tax requirements to preserve the tax- free status of interest payments over the life of the security. If at any time the covenants are not complied with, or if the IRS otherwise determines that the issuer did not comply with relevant tax requirements, interest payments from a security could become federally taxable, possibly retroactively to the date the security was issued. For certain types of structured securities, the tax status of the pass- through of tax- free income may also be based on the federal tax treatment of the structure.
In response to market, economic, political, or other conditions, a fund may temporarily use a different investment strategy (including leaving a significant portion of the fund's assets uninvested) for defensive purposes. Uninvested assets do not earn income for a fund, which may have a significant negative impact on the fund's yield and may prevent the fund from achieving its investment objective. In addition, different factors could affect a fund's performance, and the fund could distribute income subject to federal income tax.
Fundamental Investment Policies
The following is fundamental, that is, subject to change only by shareholder approval:
Fidelity® SAI Municipal Money Market Fund seeks as high a level of interest income exempt from federal income tax as is consistent with liquidity and stability of principal. The fund normally invests at least 80% of its assets in municipal securities whose interest is exempt from federal income tax.
Valuing Shares
 
The fund is open for business each day the NYSE is open.
Even if the NYSE is closed, a money market fund will be open for business on those days on which the New York Fed is open, the primary trading markets for the money market fund's portfolio instruments are open, and the money market fund's management believes there is an adequate market to meet purchase and redemption requests.
The NAV is the value of a single share. Fidelity normally calculates NAV as of the close of business of 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.
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).
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.
NAV is calculated using the values of other open-end funds, if any, in which the fund invests (referred to as underlying funds). Shares of underlying funds are valued at their respective NAVs. 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.
The value of the fund's shares will be calculated to four decimal places using "basis point" rounding (rounding to the nearest 1/100th of one percent).
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
 
The fund is an institutional money market fund, which means that the NAV of the fund's shares will "float," fluctuating with changes in the values of the fund's portfolio securities. The fund may impose a fee upon the sale of fund shares or may temporarily suspend the ability to sell shares if the fund's liquidity falls below required minimums because of market conditions or other factors.
NOT AVAILABLE FOR SALE TO THE GENERAL PUBLIC.
As used in this prospectus, the term "shares" generally refers to the shares offered through this prospectus.
Shares are offered exclusively to certain clients of the Adviser or its affiliates. If you are not currently a client in a discretionary investment program offered by the Adviser or its affiliates, please call 1-800-544-3455 (9:00 a.m. - 6:00 p.m. Eastern time, Monday through Friday) for more information. Additional fees apply for discretionary investment programs. For more information on these fees, please refer to the "Buying and Selling Information" section of the Statement of Additional Information (SAI). 
The fund may reject for any reason, or cancel as permitted or required by law, any purchase orders.
Excessive trading of fund shares can harm shareholders in various ways, including reducing the returns to long-term shareholders by increasing costs to the fund (such as spreads paid to dealers who sell money market instruments to a fund) and disrupting portfolio management strategies. 
The Adviser anticipates that shares of the fund will be purchased and sold frequently because a money market fund is designed to offer a liquid cash option.
Because investments in the fund can only be made by the Adviser or an affiliate on behalf of its clients, the potential for excessive or short-term disruptive purchases and sales is reduced. Accordingly, the Board of Trustees has not adopted policies and procedures designed to discourage excessive trading of fund shares and the fund accommodates frequent trading.  
The fund does not place a limit on purchases or sales of fund shares by the Adviser or its affiliates. The fund reserves the right, but does not have the obligation, to reject any purchase transaction at any time. In addition, the fund reserves the right to impose restrictions on disruptive, excessive, or short-term trading. 
The fund has no exchange privilege with any other fund.
Investors may be required to demonstrate eligibility to buy shares of the fund before an investment is accepted.
There is no minimum balance or purchase minimum for fund shares.
The price to buy one share is its NAV. Shares are sold without a sales charge.
Shares will be bought at the NAV next calculated after an order is received in proper form.
Shares are generally available only to investors residing in the United States.
The fund may stop offering shares completely or may offer shares only on a limited basis, for a period of time or permanently, including, if applicable, periods when redemptions are suspended.
Under applicable anti-money laundering rules and other regulations, purchase orders may be suspended, restricted, or canceled and the monies may be withheld.
The price to sell one share is its NAV.
Shares will be sold at the NAV next calculated after an order is received in proper form.
Normally, redemptions will be processed by the next business day, but it may take up to seven days to pay the redemption proceeds if making immediate payment would adversely affect the fund.
See "Policies Concerning the Redemption of Fund Shares" below for additional redemption information.
Redemptions may be suspended or payment dates postponed when the NYSE is closed (other than weekends or holidays), when trading on the NYSE is restricted, or as permitted by the SEC.
Redemption proceeds may be paid in securities or other property rather than in cash if the Adviser determines it is in the best interests of the fund.
When you terminate your relationship with the Adviser, or one of its affiliates, your shares may be sold at the NAV next calculated, in which case proceeds from such redemption would be sent to you.
Under applicable anti-money laundering rules and other regulations, redemption requests may be suspended, restricted, canceled, or processed and the proceeds may be withheld.
If applicable, orders by funds of funds for which the Adviser or its affiliates serve as investment manager will be treated as received by the fund at the same time that the corresponding orders are received in proper form by the funds of funds.
Special Limitations Affecting Redemptions:
A fund may impose liquidity fees and temporarily suspend redemptions based on the amount of fund assets that are "weekly liquid assets." Weekly liquid assets generally include cash, direct obligations of the U.S. government, certain other U.S. government or agency securities, and securities that will mature or are subject to a demand feature that is exercisable and payable within five business days.
If, at any time, the weekly liquid assets of a fund fall below 30% of total assets and the fund's Board of Trustees determines it is in the fund's best interests, the fund may, as early as the same day, impose a liquidity fee of no more than 2% and/or temporarily suspend redemptions for up to 10 business days in any 90 day period.
If, at the end of any business day, the weekly liquid assets of a fund fall below 10% of total assets, the fund will impose a liquidity fee of 1% on all redemptions beginning on the next business day, unless the fund's Board of Trustees determines that imposing such a fee would not be in the fund's best interests or determines that a lower or higher fee (not to exceed 2%) would be in the fund's best interests. Any such fee would remain in effect until weekly liquid assets return to 30% or the fund's Board of Trustees determines that the fee is no longer in the fund's best interests. The Board of Trustees of the fund may determine that it would not be in the fund's best interests to continue operating if a fund's weekly liquid assets fall below 10% or under other circumstances, at which point, the fund may permanently suspend redemptions and liquidate.
Liquidity fees are designed to transfer the costs of liquidating fund securities from shareholders who remain in a fund to those who leave the fund during periods when liquidity is scarce. The fees are payable to the fund and any fees charged to a shareholder will fully or partially offset the gain or increase the loss realized by that shareholder upon redemption.
If liquidity fees are imposed or redemptions are suspended, a fund will notify shareholders on the fund's website or by press release.
Policies Concerning the Redemption of Fund Shares
Regardless of whether your account is held directly with a fund or through an intermediary , a fund typically expects to pay redemption proceeds on the next business day (or earlier to the extent a fund offers a same day settlement feature) following receipt of a redemption order in proper form. Proceeds from the periodic and automatic sale of shares of a Fidelity ® money market fund that are used to buy shares of another Fidelity ® fund are settled simultaneously. To the extent your account is held through an intermediary, it is the responsibility of your investment professional to transmit your order to sell shares to Fidelity before the close of business on the day you place your order.
As noted elsewhere, payment of redemption proceeds may take longer than the time a fund typically expects and may take up to seven days from the date of receipt of the redemption order as permitted by applicable law.
Redemption Methods Available. Generally a fund expects to pay redemption proceeds in cash. To do so, a fund typically expects to satisfy redemption requests either by using available cash (or cash equivalents) or by selling portfolio securities. On a less regular basis, a fund may also satisfy redemption requests by utilizing one or more of the following sources, if permitted: borrowing from another Fidelity ® fund; drawing on an available line or lines of credit from a bank or banks; or using reverse repurchase agreements (if authorized). These methods may be used during both normal and stressed market conditions.
In addition to paying redemption proceeds in cash, a fund reserves the right to pay part or all of your redemption proceeds in readily marketable securities instead of cash (redemption in-kind). Redemption in-kind proceeds will typically be made by delivering the selected securities to the redeeming shareholder within seven days after the receipt of the redemption order in proper form by a fund.
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 may also realize capital gains from its investments, and distributes these gains (less losses), if any, to shareholders as capital gain distributions.
Distributions from a money market fund consist primarily of dividends. A money market fund normally declares dividends daily and pays them monthly.
Earning Dividends 
The fund processes purchase and redemption requests only on days it is open for business. 
Shares generally begin to earn dividends on the first business day following the day of purchase. 
Shares generally earn dividends until, but not including, the next business day following the day of redemption. 
Distribution Options  
Any dividends and capital gain distributions may be reinvested in additional shares or paid in cash. 
Tax Consequences
 
As with any investment, your investment in the fund could have tax consequences for you.
The fund seeks to earn income and pay dividends exempt from federal income tax.
Income exempt from federal income tax may be subject to state or local tax. A portion of the dividends you receive may be subject to federal and state income taxes and may also be subject to the federal alternative minimum tax. You may also receive taxable distributions attributable to the fund's sale of municipal bonds.
For federal tax purposes, certain distributions, including distributions of short-term capital gains and gains on the sale of bonds characterized as market discount, are taxable to you as ordinary income, while certain distributions of long-term capital gains are taxable to you generally as capital gains.
If the Adviser buys shares on your behalf when a fund has realized but not yet distributed income or capital gains, you 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 the fund will normally be taxable to you when you receive them, regardless of your distribution option.
If you elect to receive distributions in cash, you will receive certain December distributions in January, but those distributions will be taxable as if you received them on December 31.
Redemptions from the fund may result in a capital gain or loss for federal tax purposes. A capital gain or loss on your investment in the fund generally is the difference between the cost of your shares and the price you receive (net of any liquidity fees imposed) when you sell them.
Fund Services
Fund Management
 
The fund is a mutual fund, an investment that pools shareholders' money and invests it toward a specified goal.
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, 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 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, 2022, FMR UK had approximately $14.7 billion in discretionary assets under management. FMR UK is an affiliate of the Adviser.
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.
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, 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 the fund.
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, 2022, FMR Japan had approximately $6.9 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 the fund.
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)
The fund pays a management fee to the Adviser.
The management fee is calculated and paid to the Adviser every month.
The annual management fee rate, as a percentage of the fund's average net assets, is shown in the following table:
Fund
Management Fee Rate
Fidelity® SAI Municipal Money Market Fund
0.14%
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 the fund is available in the fund's semi-annual report for the fiscal period ended September 30, 2022.
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.
Distribution and Service Plan(s)
The fund has adopted a Distribution and Service Plan pursuant to Rule 12b-1 under the Investment Company Act of 1940 (1940 Act) with respect to its shares that 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.
Affiliates of the Adviser may receive service fees or distribution fees or both with respect to underlying funds that participate in Fidelity's FundsNetwork ® .
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.
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(s), along with fund financial statements, is included in the annual report. Annual reports are available for free upon request. 
Fidelity® SAI Municipal Money Market Fund
Years ended March 31,
 
     2023  
 
    2022  
 
    2021  
 
    2020
 
    2019
  Selected Per-Share Data  
 
 
 
 
 
 
 
 
 
 
  Net asset value, beginning of period
$
1.0000
$
1.0004
$
1.0002
$
1.0001
$
.9999
  Income from Investment Operations
 
 
 
 
 
 
 
 
 
 
     Net investment income (loss) A
 
.0180
 
.0003
 
.0013
 
.0142
 
.0146
     Net realized and unrealized gain (loss)
 
.0004
 
(.0003)
 
.0002
 
.0001
 
.0002
  Total from investment operations
 
.0184  
 
-  
 
.0015  
 
.0143  
 
.0148
  Distributions from net investment income
 
(.0180)
 
(.0003)
 
(.0013)
 
(.0142)
 
(.0146)
  Distributions from net realized gain
 
-
 
(.0001)
 
(.0001)
 
-
 
-
     Total distributions
 
(.0180)
 
(.0004)
 
(.0013) B
 
(.0142)
 
(.0146)
  Net asset value, end of period
$
1.0004
$
1.0000
$
1.0004
$
1.0002
$
1.0001
 
 
 
 
 
 
 
 
 
 
 
 Total Return   C
 
1.85%         
 
-%         
 
.15%
 
1.44%
 
1.49%
 
 
 
 
 
 
 
 
 
 
 
 Ratios to Average Net Assets A,D,E
 
 
 
 
 
 
 
 
 
 
    Expenses before reductions
 
.16%
 
.16%
 
.16%
 
.19%
 
.21%
    Expenses net of fee waivers, if any
 
.14%
 
.09%
 
.12%
 
.14%
 
.14%
    Expenses net of all reductions
 
.14%
 
.09%
 
.12%
 
.14%
 
.14%
    Net investment income (loss)
 
1.57%
 
.03%
 
.08%
 
1.41%
 
1.46%
 Supplemental Data
 
 
 
 
 
 
 
 
 
 
    Net assets, end of period (000 omitted)
$
160,484
$
537,411
$
445,828
$
134,798
$
295,510
A Net 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.
 
B Total distributions per share do not sum due to rounding.
 
C Total returns would have been lower if certain expenses had not been reduced during the applicable periods shown.
 
D Fees 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.
 
E Expense 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.
 
 
IMPORTANT INFORMATION ABOUT OPENING A NEW ACCOUNT
To help the government fight the funding of terrorism and money laundering activities, the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (USA PATRIOT ACT), requires all financial institutions to obtain, verify, and record information that identifies each person or entity that opens an account.
For individual investors opening an account: When you open an account, you will be asked for your name, address, date of birth, and other information that will allow Fidelity to identify you. You may also be asked to provide documents that may help to establish your identity, such as your driver's license.
For investors other than individuals:   When you open an account, you will be asked for the name of the entity, its principal place of business and taxpayer identification number (TIN). You will be asked to provide information about the entity's control person and beneficial owners, and person(s) with authority over the account, including name, address, date of birth and social security number. You may also be asked to provide documents, such as drivers' licenses, articles of incorporation, trust instruments or partnership agreements and other information that will help Fidelity identify the entity.
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 Statement of Additional Information (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.
For a free copy of any of these documents or to request other information or ask questions about the fund, call Fidelity at 1-800-544-3455. 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 [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 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), 811-02105  
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.
Fidelity, the Fidelity Investments Logo and all other Fidelity trademarks or service marks used herein are trademarks or service marks of FMR LLC. Any third-party marks that are used herein are trademarks or service marks of their respective owners. © 2023 FMR LLC. All rights reserved.
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