Supplement to the

Fidelity Managed Retirement Income Fund℠, Fidelity Managed Retirement 2010 Fund℠, Fidelity Managed Retirement 2015 Fund℠, Fidelity Managed Retirement 2020 Fund℠, Fidelity Managed Retirement 2025 Fund℠, Fidelity Managed Retirement 2030 Fund℠,and Fidelity Managed Retirement 2035 Fund℠

Class A and Class I

September 28, 2024

Prospectus

The following information replaces similar information found in the "Appendix" section under the "Sales Charge Waiver Policies Applied by Certain Intermediaries" heading.

Ameriprise Financial

Front-end sales charge reductions on Class A shares purchased through Ameriprise Financial

Shareholders purchasing Class A shares of the fund through an Ameriprise Financial platform or account are eligible only for the following sales charge reductions, which may differ from those disclosed elsewhere in this prospectus or the SAI. Such shareholders can reduce their initial sales charge on the purchase of Class A shares as follows:

• Transaction size breakpoints, as described in this prospectus or the SAI.
• Rights of accumulation (ROA), as described in this prospectus or the SAI.
• Letter of intent, as described in this prospectus or the SAI.

Front-end sales charge waivers on Class A shares purchased through Ameriprise Financial

Shareholders purchasing Class A shares of the fund through an Ameriprise Financial platform or account are eligible only for the following sales charge waivers, which may differ from those disclosed elsewhere in this prospectus or the SAI. Such shareholders may purchase Class A shares at NAV without payment of a sales charge as follows:

• shares purchased by employer-sponsored retirement plans (e.g., 401(k) plans, 457 plans, employer- sponsored 403(b) plans, profit sharing and money purchase pension plans and defined benefit plans). For purposes of this provision, employer-sponsored retirement plans do not include SEP IRAs, Simple IRAs or SAR-SEPs.
• shares purchased through reinvestment of capital gains and dividend reinvestment when purchasing shares of the same fund (but not any other fund within the same fund family).
• shares exchanged from Class C shares of the same fund in the month of or following the seven-year anniversary of the purchase date. To the extent that this prospectus elsewhere provides for a waiver with respect to such shares following a shorter holding period, that waiver will apply to exchanges following such shorter period. To the extent that this prospectus elsewhere provides for a waiver with respect to exchanges of Class C shares for load waived shares, that waiver will also apply to such exchanges.
• shares purchased by employees and registered representatives of Ameriprise Financial or its affiliates and their immediate family members.
• shares purchased by or through qualified accounts (including IRAs, Coverdell Education Savings Accounts, 401(k)s, 403(b) TSCAs subject to ERISA and defined benefit plans) that are held by a covered family member, defined as an Ameriprise Financial advisor and/or the advisor's spouse, advisor's lineal ascendant (mother, father, grandmother, grandfather, great grandmother, great grandfather), advisor's lineal descendant (son, step-son, daughter, step-daughter, grandson, granddaughter, great grandson, great granddaughter) or any spouse of a covered family member who is a lineal descendant.
• shares purchased from the proceeds of redemptions within the same fund family, provided (1) the repurchase occurs within 90 days following the redemption, (2) the redemption and purchase occur in the same account, and (3) redeemed shares were subject to a front-end or deferred sales load (i.e. Rights of Reinstatement).

CDSC waivers on Class A and C shares purchased through Ameriprise Financial

Fund shares purchased through an Ameriprise Financial platform or account are eligible only for the following CDSC waivers, which may differ from those disclosed elsewhere in this prospectus or the SAI:

• redemptions due to death or disability of the shareholder
• shares sold as part of a systematic withdrawal plan as described in this prospectus or the SAI
• redemptions made in connection with a return of excess contributions from an IRA account
• shares purchased through a Right of Reinstatement (as defined above)
• redemptions made as part of a required minimum distribution for IRA and retirement accounts pursuant to the Internal Revenue Code

AMRI-PSTK-0225-109 1.9883934.109 February 14, 2025

Supplement to the

Fidelity® Environmental Bond Fund

Class A, Class M, Class C, Class I, and Class Z

October 30, 2024

Prospectus

The following information replaces similar information found in the "Appendix" section under the "Sales Charge Waiver Policies Applied by Certain Intermediaries" heading.

Ameriprise Financial

Front-end sales charge reductions on Class A shares purchased through Ameriprise Financial

Shareholders purchasing Class A shares of the fund through an Ameriprise Financial platform or account are eligible only for the following sales charge reductions, which may differ from those disclosed elsewhere in this prospectus or the SAI. Such shareholders can reduce their initial sales charge on the purchase of Class A shares as follows:

• Transaction size breakpoints, as described in this prospectus or the SAI.
• Rights of accumulation (ROA), as described in this prospectus or the SAI.
• Letter of intent, as described in this prospectus or the SAI.

Front-end sales charge waivers on Class A shares purchased through Ameriprise Financial

Shareholders purchasing Class A shares of the fund through an Ameriprise Financial platform or account are eligible only for the following sales charge waivers, which may differ from those disclosed elsewhere in this prospectus or the SAI. Such shareholders may purchase Class A shares at NAV without payment of a sales charge as follows:

• shares purchased by employer-sponsored retirement plans (e.g., 401(k) plans, 457 plans, employer- sponsored 403(b) plans, profit sharing and money purchase pension plans and defined benefit plans). For purposes of this provision, employer-sponsored retirement plans do not include SEP IRAs, Simple IRAs or SAR-SEPs.
• shares purchased through reinvestment of capital gains and dividend reinvestment when purchasing shares of the same fund (but not any other fund within the same fund family).
• shares exchanged from Class C shares of the same fund in the month of or following the seven-year anniversary of the purchase date. To the extent that this prospectus elsewhere provides for a waiver with respect to such shares following a shorter holding period, that waiver will apply to exchanges following such shorter period. To the extent that this prospectus elsewhere provides for a waiver with respect to exchanges of Class C shares for load waived shares, that waiver will also apply to such exchanges.
• shares purchased by employees and registered representatives of Ameriprise Financial or its affiliates and their immediate family members.
• shares purchased by or through qualified accounts (including IRAs, Coverdell Education Savings Accounts, 401(k)s, 403(b) TSCAs subject to ERISA and defined benefit plans) that are held by a covered family member, defined as an Ameriprise Financial advisor and/or the advisor's spouse, advisor's lineal ascendant (mother, father, grandmother, grandfather, great grandmother, great grandfather), advisor's lineal descendant (son, step-son, daughter, step-daughter, grandson, granddaughter, great grandson, great granddaughter) or any spouse of a covered family member who is a lineal descendant.
• shares purchased from the proceeds of redemptions within the same fund family, provided (1) the repurchase occurs within 90 days following the redemption, (2) the redemption and purchase occur in the same account, and (3) redeemed shares were subject to a front-end or deferred sales load (i.e. Rights of Reinstatement).

CDSC waivers on Class A and C shares purchased through Ameriprise Financial

Fund shares purchased through an Ameriprise Financial platform or account are eligible only for the following CDSC waivers, which may differ from those disclosed elsewhere in this prospectus or the SAI:

• redemptions due to death or disability of the shareholder
• shares sold as part of a systematic withdrawal plan as described in this prospectus or the SAI
• redemptions made in connection with a return of excess contributions from an IRA account
• shares purchased through a Right of Reinstatement (as defined above)
• redemptions made as part of a required minimum distribution for IRA and retirement accounts pursuant to the Internal Revenue Code

AENB-PSTK-0225-102 1.9905040.102 February 14, 2025

Supplement to the

Fidelity® Government Income Fund

Class A, Class M, Class C, Class I, and Class Z

October 30, 2024

Prospectus

The following information replaces similar information found in the "Appendix" section under the "Sales Charge Waiver Policies Applied by Certain Intermediaries" heading.

Ameriprise Financial

Front-end sales charge reductions on Class A shares purchased through Ameriprise Financial

Shareholders purchasing Class A shares of the fund through an Ameriprise Financial platform or account are eligible only for the following sales charge reductions, which may differ from those disclosed elsewhere in this prospectus or the SAI. Such shareholders can reduce their initial sales charge on the purchase of Class A shares as follows:

• Transaction size breakpoints, as described in this prospectus or the SAI.
• Rights of accumulation (ROA), as described in this prospectus or the SAI.
• Letter of intent, as described in this prospectus or the SAI.

Front-end sales charge waivers on Class A shares purchased through Ameriprise Financial

Shareholders purchasing Class A shares of the fund through an Ameriprise Financial platform or account are eligible only for the following sales charge waivers, which may differ from those disclosed elsewhere in this prospectus or the SAI. Such shareholders may purchase Class A shares at NAV without payment of a sales charge as follows:

• shares purchased by employer-sponsored retirement plans (e.g., 401(k) plans, 457 plans, employer- sponsored 403(b) plans, profit sharing and money purchase pension plans and defined benefit plans). For purposes of this provision, employer-sponsored retirement plans do not include SEP IRAs, Simple IRAs or SAR-SEPs.
• shares purchased through reinvestment of capital gains and dividend reinvestment when purchasing shares of the same fund (but not any other fund within the same fund family).
• shares exchanged from Class C shares of the same fund in the month of or following the seven-year anniversary of the purchase date. To the extent that this prospectus elsewhere provides for a waiver with respect to such shares following a shorter holding period, that waiver will apply to exchanges following such shorter period. To the extent that this prospectus elsewhere provides for a waiver with respect to exchanges of Class C shares for load waived shares, that waiver will also apply to such exchanges.
• shares purchased by employees and registered representatives of Ameriprise Financial or its affiliates and their immediate family members.
• shares purchased by or through qualified accounts (including IRAs, Coverdell Education Savings Accounts, 401(k)s, 403(b) TSCAs subject to ERISA and defined benefit plans) that are held by a covered family member, defined as an Ameriprise Financial advisor and/or the advisor's spouse, advisor's lineal ascendant (mother, father, grandmother, grandfather, great grandmother, great grandfather), advisor's lineal descendant (son, step-son, daughter, step-daughter, grandson, granddaughter, great grandson, great granddaughter) or any spouse of a covered family member who is a lineal descendant.
• shares purchased from the proceeds of redemptions within the same fund family, provided (1) the repurchase occurs within 90 days following the redemption, (2) the redemption and purchase occur in the same account, and (3) redeemed shares were subject to a front-end or deferred sales load (i.e. Rights of Reinstatement).

CDSC waivers on Class A and C shares purchased through Ameriprise Financial

Fund shares purchased through an Ameriprise Financial platform or account are eligible only for the following CDSC waivers, which may differ from those disclosed elsewhere in this prospectus or the SAI:

• redemptions due to death or disability of the shareholder
• shares sold as part of a systematic withdrawal plan as described in this prospectus or the SAI
• redemptions made in connection with a return of excess contributions from an IRA account
• shares purchased through a Right of Reinstatement (as defined above)
• redemptions made as part of a required minimum distribution for IRA and retirement accounts pursuant to the Internal Revenue Code

AGVT-PSTK-0225-127 1.842500.127 February 14, 2025

Supplement to the

Fidelity® Total Bond Fund

Class A, Class M, Class C, Class I, and Class Z

October 30, 2024

Prospectus

The following information replaces similar information found in the "Appendix" section under the "Sales Charge Waiver Policies Applied by Certain Intermediaries" heading.

Ameriprise Financial

Front-end sales charge reductions on Class A shares purchased through Ameriprise Financial

Shareholders purchasing Class A shares of the fund through an Ameriprise Financial platform or account are eligible only for the following sales charge reductions, which may differ from those disclosed elsewhere in this prospectus or the SAI. Such shareholders can reduce their initial sales charge on the purchase of Class A shares as follows:

• Transaction size breakpoints, as described in this prospectus or the SAI.
• Rights of accumulation (ROA), as described in this prospectus or the SAI.
• Letter of intent, as described in this prospectus or the SAI.

Front-end sales charge waivers on Class A shares purchased through Ameriprise Financial

Shareholders purchasing Class A shares of the fund through an Ameriprise Financial platform or account are eligible only for the following sales charge waivers, which may differ from those disclosed elsewhere in this prospectus or the SAI. Such shareholders may purchase Class A shares at NAV without payment of a sales charge as follows:

• shares purchased by employer-sponsored retirement plans (e.g., 401(k) plans, 457 plans, employer- sponsored 403(b) plans, profit sharing and money purchase pension plans and defined benefit plans). For purposes of this provision, employer-sponsored retirement plans do not include SEP IRAs, Simple IRAs or SAR-SEPs.
• shares purchased through reinvestment of capital gains and dividend reinvestment when purchasing shares of the same fund (but not any other fund within the same fund family).
• shares exchanged from Class C shares of the same fund in the month of or following the seven-year anniversary of the purchase date. To the extent that this prospectus elsewhere provides for a waiver with respect to such shares following a shorter holding period, that waiver will apply to exchanges following such shorter period. To the extent that this prospectus elsewhere provides for a waiver with respect to exchanges of Class C shares for load waived shares, that waiver will also apply to such exchanges.
• shares purchased by employees and registered representatives of Ameriprise Financial or its affiliates and their immediate family members.
• shares purchased by or through qualified accounts (including IRAs, Coverdell Education Savings Accounts, 401(k)s, 403(b) TSCAs subject to ERISA and defined benefit plans) that are held by a covered family member, defined as an Ameriprise Financial advisor and/or the advisor's spouse, advisor's lineal ascendant (mother, father, grandmother, grandfather, great grandmother, great grandfather), advisor's lineal descendant (son, step-son, daughter, step-daughter, grandson, granddaughter, great grandson, great granddaughter) or any spouse of a covered family member who is a lineal descendant.
• shares purchased from the proceeds of redemptions within the same fund family, provided (1) the repurchase occurs within 90 days following the redemption, (2) the redemption and purchase occur in the same account, and (3) redeemed shares were subject to a front-end or deferred sales load (i.e. Rights of Reinstatement).

CDSC waivers on Class A and C shares purchased through Ameriprise Financial

Fund shares purchased through an Ameriprise Financial platform or account are eligible only for the following CDSC waivers, which may differ from those disclosed elsewhere in this prospectus or the SAI:

• redemptions due to death or disability of the shareholder
• shares sold as part of a systematic withdrawal plan as described in this prospectus or the SAI
• redemptions made in connection with a return of excess contributions from an IRA account
• shares purchased through a Right of Reinstatement (as defined above)
• redemptions made as part of a required minimum distribution for IRA and retirement accounts pursuant to the Internal Revenue Code

The following information replaces similar information found in the "Fund Summary" section under the "Principal Investment Strategies" heading.

• Allocating assets across investment-grade, high yield, and emerging markets debt securities. Emerging markets include countries that have an emerging stock market as defined by MSCI, countries or markets with low- to middle-income economies as classified by the World Bank, and other countries or markets that the Adviser identifies as having similar emerging markets characteristics.
• Investing up to 20% of assets in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).
• Managing the fund to have similar overall interest rate risk to the Bloomberg U.S. Aggregate Bond Index.

The following information replaces similar information found in the "Investment Details" section under the "Principal Investment Strategies" heading.

The Adviser normally invests at least 80% of the fund's assets in debt securities of all types and repurchase agreements for those securities. The Adviser allocates the fund's assets across investment-grade, high yield, and emerging markets debt securities. Emerging markets include countries that have an emerging stock market as defined by MSCI, countries or markets with low- to middle-income economies as classified by the World Bank, and other countries or markets that the Adviser identifies as having similar emerging markets characteristics. Emerging markets tend to have relatively low gross national product per capita compared to the world's major economies and may have the potential for rapid economic growth. The Adviser may invest up to 20% of the fund's assets in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).

The Adviser uses the Bloomberg U.S. Aggregate Bond Index as a guide in structuring the fund and selecting its investments. The Adviser manages the fund to have similar overall interest rate risk to the index.

ATB-PSTK-0225-141 1.808071.141 February 14, 2025