AMERICAN CENTURY GOVERNMENT INCOME TRUST
497K1, 1998-09-23
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                                  FUND PROFILE

                               Short-Term Treasury

                                 INVESTOR CLASS

                                November 6, 1998

                        [american century logo(reg.sm)]
                                    American
                                    Century

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
        accessing our Web site, or visiting one of our Investor Centers.
        See the back cover for additional phone numbers and our address.

                                  BENHAM GROUP


                          AMERICAN CENTURY INVESTMENTS
                               SHORT-TERM TREASURY

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Short-Term  Treasury  seeks the highest  level of current  income exempt
     from state income tax while maintaining safety of capital.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund buys  short-term  U.S.  Treasury  securities  guaranteed by the
     direct full faith and credit pledge of the U.S. government.

        The  fund  also  may  buy  short-term  securities  issued  by  the  U.S.
     government,  its  agencies  and  instrumentalities.   The  U.S.  government
     provides  varying  levels  of  financial  support  to  these  agencies  and
     instrumentalities.  The fund may  invest up to 35% of its  total  assets in
     these securities.

        The fund may purchase  securities in a number of different  ways to seek
     higher  rates of return.  For  example,  by using  when-issued  and forward
     commitment  transactions,  the fund may purchase  securities  in advance to
     generate additional income.

        The weighted  average  maturity of the fund is expected to be between 13
     months and three years.

        Additional   information  about  Short-Term  Treasury's  investments  is
     available in its annual and semiannual  reports.  In these reports you will
     find a discussion of the market  conditions and investment  strategies that
     significantly  affected  the  fund's  performance  during  the most  recent
     six-month period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *   Interest  rate changes  affect the amount of income the fund  generates.
        Generally,  when  interest  rates  rise,  the  fund's  share  value will
        decline. The opposite is true when interest rates decline. This interest
        rate risk is higher  for  Short-Term  Treasury  than for funds that have
        shorter weighted average maturities, such as money market funds.

    *   As with all  funds,  at any  given  time,  the  value of your  shares of
        Short-Term  Treasury  may be worth more or less than the price you paid.
        If you sell your  shares when the value is less than the price you paid,
        you will lose money.  Additionally,  an  investment in the fund is not a
        bank deposit,  nor is it insured or  guaranteed  by the Federal  Deposit
        Insurance Corporation or any other government agency.

     FUND PERFORMANCE

         The  bar  chart  below  shows  the  actual  performance  of  Short-Term
     Treasury's Investor Class shares for each calendar year since its inception
     on September 8, 1992. It indicates the volatility of the fund's  historical
     returns from year to year. Neither it nor the performance information below
     the bar chart is  intended  to  indicate  how the fund will  perform in the
     future.

     [bar chart to be filed]

     As of September  30,  1998,  the end of the most recent  calendar  quarter,
     Short-Term Treasury's year-to-date return was _____%.

         The highest and lowest returns of the fund's  Investor Class shares for
     a calendar  quarter since its inception on September 8, 1992,  are provided
     in the chart below to indicate the fund's however, that Short-Term Treasury
     is intended for investors  with a long-term  investment  horizon and is not
     managed for historical short-term volatility. Shareholders should be aware,
     short-term results.

     [bar chart to be filed]

SHORT-TERM TREASURY                                AMERICAN CENTURY INVESTMENTS


          The table below shows the average annual return of the fund's Investor
     Class   shares  for  the   periods   indicated.   The   Salomon   1-3  Year
     Treasury/Agency Index, an unmanaged index that reflects no operating costs,
     is included for long-term performance comparisons.

                                    1 YR.    5 YRS.    10 YRS.  LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
        Short-Term Treasury         5.5%     5.5%       5.5%      5.5%
        Salomon 1-3 Yr.
           Treasury/Agency Index    6.0%     6.0%       6.0%      6.0%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.51%(1)
           Distribution and Service (12b-1) Fees           None
           Other Expenses(2)                              0.02%
           Total Annual Fund Operating Expenses           0.53%

        (1)Based on assets as of March 31, 1998. The fund's management fee
        decreases as fund assets increase.

        (2)Other   expenses   include  the  fees  and  expenses  of  the  fund's
        independent  trustees,  their legal counsel,  interest and extraordinary
        expenses.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                 . . . your cost of investing in the fund would be:

           1 year       3 years      5 years       10 years
          ----------------------------------------------------
           $54           $170          $296          $665

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGER?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together  to  manage  our  mutual  funds.  The  portfolio  manager  on  the
     Short-Term Treasury team is:

        NEWLIN  RANKIN,  Senior  Portfolio  Manager,  has been a  member  of the
     Short-Term  Treasury  team since March 1996.  Mr.  Rankin  joined  American
     Century in 1994. Prior to that, he was an Assistant Vice President at Wells
     Fargo Bank.

6. HOW DO I BUY FUND SHARES?

    *   Complete and return the enclosed application

    *   Call us and exchange shares from another American Century fund

    *   Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts). If the value of your account falls
     below this account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or calling  us. You also may  exchange  your  shares in  Short-Term
     Treasury  for shares in nearly 70 other  mutual  funds  offered by American
     Century.  Depending  on the options you select when you open your  account,
     some restrictions may apply. For your protection,  some redemption requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Short-Term  Treasury  pays  distributions  of  substantially  all of its
     income monthly.  Distributions  may be taxable as ordinary income,  capital
     gains,  or a combination  of the two.  Capital gains are taxed at different
     rates  depending  on the length of time the fund held the  securities  that
     were sold.  Distributions are reinvested automatically in additional shares
     unless you choose another option.

        The fund's income is exempt from most state income  taxes.  Consult with
     your tax advisor to see if the fund's income is exempt in your state.


FUND PROFILE                                              SHORT-TERM TREASURY


 9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

    *   telephone transactions

    *   wire and electronic funds transfers

    *   24-hour Automated Information Line transactions

    *   24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------

[american century logo(reg.sm)]
American
Century

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.
                                  (c) 1998 American Century Services Corporation
SH-BRO-13777   9810
<PAGE>
                                  FUND PROFILE

                              Short-Term Government

                                 INVESTOR CLASS

                                November 6, 1998

                        [american century logo(reg.sm)]
                                    American
                                    Century

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
        accessing our Web site, or visiting one of our Investor Centers.
        See the back cover for additional phone numbers and our address.

                                  BENHAM GROUP


                          AMERICAN CENTURY INVESTMENTS
                              SHORT-TERM GOVERNMENT

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Short-Term Government seeks high current income while maintaining safety
     of principal.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund buys short-term  securities issued by the U.S. government,  its
     agencies and instrumentalities,  including mortgage-backed  securities. The
     U.S.  government  provides  varying  levels of  financial  support to these
     agencies  and  instrumentalities.  The fund  also may buy  short-term  U.S.
     Treasury  securities  guaranteed by the direct full faith and credit pledge
     of the U.S. government.

        The fund may purchase  securities in a number of different  ways to seek
     higher  rates of return.  For  example,  by using  when-issued  and forward
     commitment  transactions,  the fund may purchase  securities  in advance to
     generate additional income.

        The weighted  average maturity of the fund is expected to be three years
     or less.

        Additional  information  about  Short-Term  Government's  investments is
     available in its annual and semiannual  reports.  In these reports you will
     find a discussion of the market  conditions and investment  strategies that
     significantly  affected  the  fund's  performance  during  the most  recent
     six-month period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *   Interest  rate changes  affect the amount of income the fund  generates.
        Generally,  when  interest  rates  rise,  the  fund's  share  value will
        decline. The opposite is true when interest rates decline. This interest
        rate risk is higher for Short-Term  Government  than for funds that have
        shorter weighted average maturities, such as money market funds.

    *   Short-Term  Government  invests  in  mortgage-backed   securities.  When
        homeowners  refinance  their  mortgages  to take  advantage of declining
        interest  rates,  their existing  mortgages are prepaid.  The mortgages,
        which back the  securities  purchased by Short-Term  Government,  may be
        prepaid in this fashion. Because of this "prepayment risk," the fund may
        benefit less from declining interest rates than other short-term funds.

    *   As with all  funds,  at any  given  time,  the  value of your  shares of
        Short-Term Government may be worth more or less than the price you paid.
        If you sell your  shares when the value is less than the price you paid,
        you will lose money.  Additionally,  an  investment in the fund is not a
        bank deposit,  nor is it insured or  guaranteed  by the Federal  Deposit
        Insurance Corporation or any other government agency.

     FUND PERFORMANCE

        The  bar  chart  below  shows  the  actual   performance  of  Short-Term
     Government's  Investor Class shares for each of the last 10 calendar years.
     It indicates the volatility of the fund's  historical  returns from year to
     year.  Neither it nor the  performance  information  below the bar chart is
     intended to indicate how the fund will perform in the future.

     [bar chart to be filed]

     As of September  30,  1998,  the end of the most recent  calendar  quarter,
     Short-Term Government's year-to-date performance was ____%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's historical short-term  volatility.  Shareholders should
     be aware,  however,  that  Short-Term  Government is intended for investors
     with a long-term  investment  horizon  and is not  managed  for  short-term
     results.

     [bar chart to be filed]

SHORT-TERM GOVERNMENT                              AMERICAN CENTURY INVESTMENTS


        The table below shows the average  annual return of the fund's  Investor
     Class   shares  for  the   periods   indicated.   The   Salomon   1-3  Year
     Treasury/Agency Index, an unmanaged index that reflects no operating costs,
     is included for long-term performance comparisons.

                                      1 YR.   5 YRS.   10 YRS.  LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
        Short-Term Government         5.5%    5.5%      5.5%        5.5%
        Salomon 1-3 Yr. Treasury/
          Agency Index                6.0%    6.0%      6.0%        6.0%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.59%(1)
           Distribution and Service (12b-1) Fees           None
           Other Expenses(2)                              0.00%
           Total Annual Fund Operating Expenses           0.59%

        (1)Based on assets as of March 31, 1998. The fund's management fee
        decreases as fund assets increase.

        (2)Other  expenses,  which  include the fees and  expenses of the fund's
        independent  trustees,  their legal counsel,  interest and extraordinary
        expenses, were less than 0.005% for the most recent fiscal year.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

            1 year      3 years      5 years      10 years
          --------------------------------------------------
             $60         $189         $329          $738

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGER?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together  to  manage  our  mutual  funds.  The  portfolio  manager  on  the
     Short-Term Government team is:

        NEWLIN  RANKIN,  Senior  Portfolio  Manager,  has been a  member  of the
     Short-Term  Government  team since March 1996.  Mr. Rankin joined  American
     Century in 1994. Prior to that, he was an Assistant Vice President at Wells
     Fargo Bank.

6. HOW DO I BUY FUND SHARES?

    *   Complete and return the enclosed application

    *   Call us and exchange shares from another American Century fund

    *   Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts). If the value of your account falls
     below this account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or calling  us. You also may  exchange  your  shares in  Short-Term
     Government  for shares in nearly 70 other mutual funds  offered by American
     Century.  Depending  on the options you select when you open your  account,
     some restrictions may apply. For your protection,  some redemption requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Short-Term  Government pays  distributions of  substantially  all of its
     income monthly.  Distributions  may be taxable as ordinary income,  capital
     gains,  or a combination  of the two.  Capital gains are taxed at different
     rates  depending  on the length of time the fund held the  securities  that
     were sold.  Distributions are reinvested automatically in additional shares
     unless you choose another option.


FUND PROFILE                                             SHORT-TERM GOVERNMENT


9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

    *   telephone transactions

    *   wire and electronic funds transfers

    *   24-hour Automated Information Line transactions

    *   24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------
[american century logo(reg.sm)]
American
Century

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                        Funds Distributor, Inc.
                                 (c) 1998 American Century Services Corporation

SH-BRO-13781   9810
<PAGE>
                                  FUND PROFILE

                           Inflation-Adjusted Treasury

                                 INVESTOR CLASS

                                November 6, 1998

                        [american century logo(reg.sm)]
                                    American
                                    Century

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
         accessing our Web site or visiting one of our Investor Centers.
        See the back cover for additional phone numbers and our address.

                                  BENHAM GROUP


                          AMERICAN CENTURY INVESTMENTS
                           INFLATION-ADJUSTED TREASURY

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Inflation-Adjusted   Treasury  seeks  a  total  return  consistent  with
     investment in U.S. Treasury inflation-adjusted securities.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund buys  inflation-adjusted U.S. Treasury securities guaranteed by
     the  direct  full  faith and credit  pledge of the U.S.  government.  These
     inflation-adjusted securities are designed to protect the future purchasing
     power of the money invested in them.

        The  fund  also  may  buy  U.S.   Treasury   securities   that  are  not
     inflation-adjusted.  The fund may  invest up to 35% of its total  assets in
     these securities.

        The fund may purchase  securities in a number of different  ways to seek
     higher  rates of return.  For  example,  by using  when-issued  and forward
     commitment  transactions,  the fund may purchase  securities  in advance to
     generate additional income.

        Additional information about  Inflation-Adjusted  Treasury's investments
     is available in its annual and  semiannual  reports.  In these  reports you
     will find a discussion of the market  conditions and investment  strategies
     that  significantly  affected the fund's performance during the most recent
     six-month period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *   Inflation-adjusted  securities  are sold based upon an assumption  about
        "real"  interest  rates.  Real  interest  rates are the  market  rate of
        interest  minus  the  anticipated  rate of  inflation.  Changes  in real
        interest  rates  affect  the  amount  of  income  the  fund   generates.
        Generally,  when real interest  rates rise,  the fund's share value will
        decline.  The opposite is true when interest  rates  decline.  This real
        interest  rate risk is higher for  Inflation-Adjusted  Treasury than for
        funds that do not invest in inflation-adjusted securities.

    *   As with all  funds,  at any  given  time,  the  value of your  shares of
        Inflation-Adjusted Treasury may be worth more or less than the price you
        paid.  If you sell your shares when the value is less than the price you
        paid,  you will lose money.  Additionally,  an investment in the fund is
        not a bank  deposit,  nor is it insured  or  guaranteed  by the  Federal
        Deposit Insurance Corporation or any other government agency.

     FUND PERFORMANCE

        The bar chart below shows the actual  performance of  Inflation-Adjusted
     Treasury's Investor Class shares for each calendar year since its inception
     on February 10, 1997. It indicates the volatility of the fund's  historical
     returns from year to year. Neither it nor the performance information below
     the bar chart is  intended  to  indicate  how the fund will  perform in the
     future.

     [bar chart to be filed]

     As of September  30,  1998,  the end of the most recent  calendar  quarter,
     Inflation-Adjusted Treasury's year-to-date return was ________%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since its inception on February 10, 1997, are provided in
     the chart below to indicate the fund's  historical  short-term  volatility.
     Shareholders should be aware, however, that Inflation-Adjusted  Treasury is
     intended for managed for short-term results.

     [bar chart to be filed]

INFLATION-ADJUSTED TREASURY                        AMERICAN CENTURY INVESTMENTS


        The table below shows the average  annual return of the fund's  Investor
     Class shares for the periods indicated.  The Salomon U.S.  Inflation-Linked
     Securities  Index, an unmanaged index that reflects no operating  costs, is
     included for long-term performance comparisons.

                                          1 YR.  5 YRS.   10 YRS.   LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
          Inflation-Adjusted Treasury      5.5%   5.5%      5.5%        5.5%
          Salomon U.S. Inflation-Linked
             Securities Index              6.0%   6.0%      6.0%        6.0%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.51%(1)
           Distribution and Service (12b-1) Fees          None
           Other Expenses(2)                              0.13%
           Total Annual Fund Operating Expenses           0.64%

        (1)Based on assets as of March 31, 1998. The fund's management fee
        decreases as fund assets increase.

        (2)Other   expenses   include  the  fees  and  expenses  of  the  fund's
        independent  trustees,  their legal counsel,  interest and extraordinary
        expenses.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

           1 year         3 years         5 years        10 years
           -------------------------------------------------------
            $65             $205            $357           $798

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGER?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together  to  manage  our  mutual  funds.  The  portfolio  manager  on  the
     Inflation-Adjusted Treasury team is:

        DAVID SCHROEDER, Vice President and Senior Portfolio Manager, has been a
     member of the  Inflation-Adjusted  Treasury  team  since its  inception  on
     February 10, 1997. Mr.  Schroeder joined American Century in July 1990 as a
     portfolio manager.

6. HOW DO I BUY FUND SHARES?

    *   Complete and return the enclosed application

    *   Call us and exchange shares from another American Century fund

    *   Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts). If the value of your account falls
     below this account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing   or   calling   us.  You  also  may   exchange   your   shares  in
     Inflation-Adjusted  Treasury  for  shares in nearly 70 other  mutual  funds
     offered by American  Century.  Depending on the options you select when you
     open your account,  some restrictions may apply. For your protection,  some
     redemption requests require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Inflation-Adjusted  Treasury pays  distributions of substantially all of
     its income, including "imputed income," monthly.

        Distributions  may be taxable as ordinary  income,  capital gains,  or a
     combination  of the  two.  Capital  gains  are  taxed  at  different  rates
     depending  on the  length  of time the fund held the  securities  that were
     sold.  Distributions  are  reinvested  automatically  in additional  shares
     unless you choose another option.

        The fund's income is exempt from most state income  taxes.  Consult with
     your tax advisor to see if the fund's income is exempt in your state.


FUND PROFILE                                       INFLATION-ADJUSTED TREASURY


9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

    *   telephone transactions

    *   wire and electronic funds transfers

    *   24-hour Automated Information Line transactions

    *   24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------

[american century logo(reg.sm)]
American
Century

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.
                                  (c) 1998 American Century Services Corporation

SH-BRO-13782   9810
<PAGE>
                                  FUND PROFILE

                              Capital Preservation

                                 INVESTOR CLASS

                                November 6, 1998

                         [american century logo(reg.sm)]
                                    American
                                     Century

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
        accessing our Web site, or visiting one of our Investor Centers.
        See the back cover for additional phone numbers and our address.

                                  BENHAM GROUP


                          AMERICAN CENTURY INVESTMENTS
                              CAPITAL PRESERVATION

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Capital  Preservation  is a money market fund that seeks maximum  safety
     and  liquidity,  and  to  pay  shareholders  the  highest  rate  of  return
     consistent with this objective.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The  fund  buys  very  short-term  U.S.  Treasury  securities  that  are
     guaranteed  by the  direct  full  faith  and  credit  pledge  of  the  U.S.
     government.

        The fund may purchase  securities in a number of different  ways to seek
     higher  rates of return.  For  example,  by using  when-issued  and forward
     commitment  transactions,  the fund may purchase  securities  in advance to
     generate additional income.

        The weighted  average  maturity of the fund is expected to be 90 days or
     less.

        Additional  information  about  Capital  Preservation's  investments  is
     available in its annual and semiannual  reports.  In these reports you will
     find a discussion of the market  conditions and investment  strategies that
     significantly  affected  the  fund's  performance  during  the most  recent
     six-month period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

      * An investment  in the fund is not a bank  deposit,  nor is it insured or
      guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any other
      government agency.

      * Although  the fund seeks to  preserve  the value of your  investment  at
      $1.00 per share, it is possible to lose money by investing in the fund.

      * Because  very  short-term  securities  are among the  safest  securities
      available,  the  interest  they pay is among the lowest for  income-paying
      securities.  Accordingly, the yield on this fund will likely be lower than
      funds that invest in longer-term or lower-quality securities.

     FUND PERFORMANCE

        The  bar  chart   below   shows  the  actual   performance   of  Capital
     Preservation's  Investor  Class  shares  for each of the  last 10  calendar
     years.  It indicates the volatility of the fund's  historical  returns from
     year to year.  Neither  it nor the  performance  information  below the bar
     chart is intended to indicate how the fund will perform in the future.

     [bar chart to be filed]

     As of September  30,  1998,  the end of the most recent  calendar  quarter,
     Capital Preservation's year-to-date return was ____%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's historical short-term volatility.

     [bar chart to be filed]

        The table at the top of the  following  page  shows the  average  annual
     return of the fund's Investor Class shares for the periods  indicated.  The
     Lipper U.S.  Treasury  Money  Market Fund Index,  an  unmanaged  index that
     reflects  no  operating  costs,  is  included  for  long-term   performance
     comparisons.


CAPITAL PRESERVATION                              AMERICAN CENTURY INVESTMENTS


                                      1 YR.    5 YRS.  10 YRS.  LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
           Capital Preservation        5.5%     5.5%     5.5%      5.5%
           Lipper U.S. Treasury Money
             Market Fund Index         6.0%     6.0%     6.0%      6.0%
           For current performance information, including yields, please call
           us or access our Web site.

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.48%(1)
           Distribution and Service (12b-1) Fees           None
           Other Expenses(2)                              0.00%
           Total Annual Fund Operating Expenses           0.48%

        (1)Based on assets as of March 31, 1998. The fund's management fee
        decreases as fund assets increase.

        (2)Other  expenses,  which  include the fees and  expenses of the fund's
        independent  trustees,  their legal counsel,  interest and extraordinary
        expenses, were less than 0.005% for the most recent fiscal year.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

            1 year      3 years       5 years       10 years
           --------------------------------------------------
             $49         $154          $269          $604

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGER?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage our mutual funds.  The portfolio  manager on the Capital
     Preservation team is:

        AMY  O'DONNELL,  Portfolio  Manager,  has been a member  of the  Capital
     Preservation  team since April 1997. Ms.  O'Donnell joined American Century
     in 1987 as a research analyst and has been a portfolio manager since 1992.

6. HOW DO I BUY FUND SHARES?

      * Complete and return the enclosed application

      * Call us and exchange shares from another American Century fund

      * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRA and Roth IRA  accounts).  If the value of your account falls below this
     account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing  or  calling  us.  You also may  exchange  your  shares in  Capital
     Preservation for shares in nearly 70 other mutual funds offered by American
     Century.  Depending  on the options you select when you open your  account,
     some restrictions may apply. For your protection,  some redemption requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Dividends  are declared and  available  for  redemption  daily.  Because
     Capital  Preservation is a money market fund, its  distributions  generally
     will be taxed as ordinary  income.  If the fund's share price were to go up
     or down,  its annual  distributions  also could  include  capital  gains or
     losses.  Distributions  are reinvested  automatically in additional  shares
     unless you choose another option.


FUND PROFILE                                               CAPITAL PRESERVATION


        The fund's income is exempt from most state income  taxes.  Consult with
     your tax advisor to see if the fund's income is exempt in your state.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

      * telephone transactions

      * wire and electronic funds transfers

      * 24-hour Automated Information Line transactions

      * 24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------

[american century logo(reg.sm)]
American
Century

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.
                                  (c) 1998 American Century Services Corporation

SH-BRO-13779   9810
<PAGE>
                                  FUND PROFILE

                         Government Agency Money Market

                                 INVESTOR CLASS

                                November 6, 1998

                         [american century logo(reg.sm)]
                                    American
                                     Century

- --------------------------------------------------------------------------------
    This profile summarizes key information about the fund that is included
     in the fund's Prospectus. The fund's Prospectus includes additional
    information  about the fund,  including a more detailed  description  of the
     risks associated with investing in the fund, that you may want
   to consider before you invest. You may obtain the Prospectus and other
   information about the fund at no cost by calling us at 1-800-345-2021,
      accessing our Web site, or visiting one of our Investor Centers.
      See the back cover for additional phone numbers and our address.

                                  BENHAM GROUP


                          AMERICAN CENTURY INVESTMENTS
                         GOVERNMENT AGENCY MONEY MARKET

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Government  Agency  Money Market seeks to pay the highest rate of return
     while  maintaining  liquidity  and safety of  principal.  The fund  invests
     exclusively  in  short-term  obligations  of the  U.S.  government  and its
     agencies  and  instrumentalities.  The fund  seeks to  purchase  only those
     securities with income that will be exempt from state income tax.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund buys very short-term  securities issued by the U.S. government,
     its agencies and  instrumentalities.  The U.S.  government provides varying
     levels of financial support to these agencies and instrumentalities.

        The fund also may buy very short-term U.S. Treasury  securities that are
     guaranteed  by the  direct  full  faith  and  credit  pledge  of  the  U.S.
     government.

        The fund may purchase  securities in a number of different  ways to seek
     higher  rates of return.  For  example,  by using  when-issued  and forward
     commitment  transactions,  the fund may purchase  securities  in advance to
     generate additional income.

        The weighted  average  maturity of the fund is expected to be 90 days or
     less.

        Additional   information   about   Government   Agency  Money   Market's
     investments  is available in its annual and  semiannual  reports.  In these
     reports you will find a discussion of the market  conditions and investment
     strategies that  significantly  affected the fund's  performance during the
     most  recent  six-month  period.  You may get these  reports  at no cost by
     calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *An  investment  in the fund is not a bank  deposit,  nor is it  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government agency.

    *Although the fund seeks to preserve the value of your  investment  at $1.00
     per share, it is possible to lose money by investing in the fund.

    *Because  very  short-term   securities  are  among  the  safest  securities
     available,  the  interest  they pay is among the lowest  for  income-paying
     securities.  Accordingly,  the yield on this fund will likely be lower than
     funds that invest in longer-term or lower-quality securities.

     FUND PERFORMANCE

        The bar chart below shows the actual  performance  of Government  Agency
     Money  Market's  Investor Class shares for each year since its inception on
     December 5, 1989.  It indicates  the  volatility  of the fund's  historical
     returns from year to year. Neither it nor the performance information below
     the bar chart is  intended  to  indicate  how the fund will  perform in the
     future.

     [bar chart to be filed]

     As of September  30,  1998,  the end of the most recent  calendar  quarter,
     Government Agency Money Market's year-to-date return was ____%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since its inception on December 5, 1989,  are provided in
     the chart below to indicate the fund's historical short-term volatility.

     [bar chart to be filed]

        The table at the top of the  following  page  shows the  average  annual
     return of the fund's Investor Class shares for the periods  indicated.  The
     Lipper U.S.  Government  Money Market Fund Index,  an unmanaged  index that
     reflects  no  operating  costs,  is  included  for  long-term   performance
     comparisons.


Government Agency Money Market                   American Century Investments


                                      1 YR.     5 YRS.  10 YRS.  LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
         Government Agency
           Money Market                5.5%     5.5%     5.5%      5.5%
         Lipper U.S. Government
           Money Market Fund Index     6.0%     6.0%     6.0%      6.0%

           For current performance information, including yields, please call us
        or access our Web site.

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.48%(1)
           Distribution and Service (12b-1) Fees           None
           Other Expenses(2)                              0.00%
           Total Annual Fund Operating Expenses           0.48%

        (1)Based on assets as of March 31, 1998. The fund's management fee
        decreases as fund assets increase.

        (2)Other  expenses,  which  include the fees and  expenses of the fund's
        independent  trustees,  their legal counsel,  interest and extraordinary
        expenses, were less than 0.005% for the most recent fiscal year.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

            1 year      3 years      5 years      10 years
           ------------------------------------------------
             $49         $154         $269         $604

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGER?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together  to  manage  our  mutual  funds.  The  portfolio  manager  on  the
     Government Agency Money Market team is:

        AMY O'DONNELL,  Portfolio  Manager,  has been a member of the Government
     Agency Money Market team since April 1997. Ms.  O'Donnell  joined  American
     Century  in 1987 as a research  analyst  and has been a  portfolio  manager
     since 1992.

6. HOW DO I BUY FUND SHARES?

      * Complete and return the enclosed application

      * Call us and exchange shares from another American Century fund

      * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRA and Roth IRA  accounts).  If the value of your account falls below this
     account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or calling  us. You also may  exchange  your  shares in  Government
     Agency Money  Market for shares in nearly 70 other mutual funds  offered by
     American  Century.  Depending  on the options you select when you open your
     account, some restrictions may apply. For your protection,  some redemption
     requests require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Dividends are declared and available for redemption daily. You may elect
     to have  distributions  automatically  deposited back into your  Government
     Agency Money Market account,  sent directly to your bank account or sent to
     you by check.  Because  Government  Agency  Money  Market is a money market
     fund, its distributions  generally will be taxed as ordinary income. If the
     fund's  share price were to go up or down,  its annual  distributions  also
     could include capital gains or losses.


Fund Profile                                     Government Agency Money Market


        The fund's income is exempt from most state income  taxes.  Consult with
     your tax advisor to see if the fund's income is exempt in your state.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

      * telephone transactions

      * wire and electronic funds transfers

      * 24-hour Automated Information Line transactions

      * 24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------

[american century logo(reg.sm)]
American
Century

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.
                                  (c) 1998 American Century Services Corporation

SH-BRO-13780   9810
<PAGE>
                                  FUND PROFILE

                           Intermediate-Term Treasury

                                 INVESTOR CLASS

                                November 6, 1998

                         [american century logo(reg.sm)]
                                    American
                                     Century

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
        accessing our Web site, or visiting one of our Investor Centers.
        See the back cover for additional phone numbers and our address.

                                  BENHAM GROUP


                          AMERICAN CENTURY INVESTMENTS
                           INTERMEDIATE-TERM TREASURY

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Intermediate-Term  Treasury  seeks the highest  level of current  income
     exempt from state income tax while maintaining safety of capital.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund buys  intermediate-term  U.S. Treasury securities guaranteed by
     the direct full faith and credit pledge of the U.S. government.

        The fund also may buy  intermediate-term  securities  issued by the U.S.
     government,  its  agencies  and  instrumentalities.   The  U.S.  government
     provides  varying  levels  of  financial  support  to  these  agencies  and
     instrumentalities.  The fund may  invest up to 35% of its  total  assets in
     these securities.

        The fund may purchase  securities in a number of different  ways to seek
     higher  rates of return.  For  example,  by using  when-issued  and forward
     commitment  transactions,  the fund may purchase  securities  in advance to
     generate additional income.

        The  weighted  average  maturity  of the fund is  expected to be between
     three and 10 years.

        Additional information about Intermediate-Term Treasury's investments is
     available in its annual and semiannual  reports.  In these reports you will
     find a discussion of the market  conditions and investment  strategies that
     significantly  affected  the  fund's  performance  during  the most  recent
     six-month period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *Interest  rate  changes  affect the  amount of income  the fund  generates.
     Generally,  when interest  rates rise, the fund's share value will decline.
     The opposite is true when interest rates  decline.  This interest rate risk
     is higher for  Intermediate-Term  Treasury than for funds that have shorter
     weighted average maturities, such as short-term funds.

    *As with  all  funds,  at any  given  time,  the  value  of your  shares  of
     Intermediate-Term  Treasury  may be worth  more or less  than the price you
     paid.  If you sell  your  shares  when the value is less than the price you
     paid, you will lose money. Additionally, an investment in the fund is not a
     bank  deposit,  nor is it  insured or  guaranteed  by the  Federal  Deposit
     Insurance Corporation or any other government agency.

    FUND PERFORMANCE

        The bar chart below shows the actual  performance  of  Intermediate-Term
     Treasury's Investor Class shares for each of the last 10 calendar years. It
     indicates  the  volatility  of the fund's  historical  returns from year to
     year.  Neither it nor the  performance  information  below the bar chart is
     intended to indicate how the fund will perform in the future.

     [bar chart to be filed]

     As of September  30,  1998,  the end of the most recent  calendar  quarter,
     Intermediate-Term Treasury's year-to-date return was _____%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's historical short-term  volatility.  Shareholders should
     be  aware,  however,  that  Intermediate-Term   Treasury  is  intended  for
     investors  with a  long-term  investment  horizon  and is not  managed  for
     short-term results.

     [bar chart to be filed]

        The table at the top of the  following  page  shows the  average  annual
     return of the fund's Investor Class shares for the periods  indicated.  The
     Salomon  3-10 year  Treasury  Index,  an unmanaged  index that  reflects no
     operating costs, is included for long-term performance comparisons.


INTERMEDIATE-TERM TREASURY                         AMERICAN CENTURY INVESTMENTS


                                        1 YR.  5 YRS.  10 YRS.  LIFE OF FUND
      AVERAGE  ANNUAL  TOTAL   RETURNS   (PERIOD   ENDED   SEPTEMBER  30,  1998)
          Intermediate-Term Treasury    5.5%    5.5%     5.5%      5.5% 
          Salomon 3-10 Year
             Treasury Index             6.0%    6.0%     6.0%      6.0%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.51%(1)
           Distribution and Service (12b-1) Fees           None
           Other Expenses(2)                              0.00%
           Total Annual Fund Operating Expenses           0.51%

        (1)Based on assets as of March 31, 1998. The fund's management fee
        decreases as fund assets increase.

        (2)Other  expenses,  which  include the fees and  expenses of the fund's
        independent  trustees,  their legal counsel,  interest and extraordinary
        expenses, were less than 0.005% for the most recent fiscal year.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

            1 year     3 years     5 years     10 years
           ---------------------------------------------
             $52        $164        $285        $640

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGER?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together  to  manage  our  mutual  funds.  The  portfolio  manager  on  the
     Intermediate-Term Treasury team is:

        ROBERT GAHAGAN,  Vice President and Portfolio Manager, has been a member
     of the  Intermediate-Term  Treasury team since January  1998.  Mr.  Gahagan
     joined  American  Century  in 1983 and has been a  portfolio  manager  with
     American Century since 1991.

6. HOW DO I BUY FUND SHARES?

      * Complete and return the enclosed application

      * Call us and exchange shares from another American Century fund

      * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts). If the value of your account falls
     below this account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing   or   calling   us.  You  also  may   exchange   your   shares  in
     Intermediate-Term  Treasury  for  shares in nearly  70 other  mutual  funds
     offered by American  Century.  Depending on the options you select when you
     open your account,  some restrictions may apply. For your protection,  some
     redemption requests require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Intermediate-Term  Treasury pays  distributions of substantially  all of
     its  income  monthly.  Distributions  may be taxable  as  ordinary  income,
     capital gains, or a combination of the


FUND PROFILE                                         INTERMEDIATE-TERM TREASURY


     two.  Capital gains are taxed at different rates depending on the length of
     time the  fund  held the  securities  that  were  sold.  Distributions  are
     reinvested  automatically  in additional  shares unless you choose  another
     option.

        The fund's income is exempt from most state income  taxes.  Consult with
     your tax advisor to see if the fund's income is exempt in your state.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

      * telephone transactions

      * wire and electronic funds transfers

      * 24-hour Automated Information Line transactions

      * 24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------

[american century logo(reg.sm)]
American
Century

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200 KANSAS CITY,
MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                        Funds Distributor, Inc.
                                 (c) 1998 American Century Services Corporation

SH-BRO-13775   9810
<PAGE>
                                  FUND PROFILE

                               Long-Term Treasury

                                 INVESTOR CLASS

                                November 6, 1998

                         [american century logo(reg.sm)]
                                    American
                                     Century

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
        accessing our Web site, or visiting one of our Investor Centers.
        See the back cover for additional phone numbers and our address.

                                  BENHAM GROUP


                          AMERICAN CENTURY INVESTMENTS
                               LONG-TERM TREASURY

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Long-Term Treasury seeks the highest level of current income exempt from
     state income tax while maintaining safety of capital.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund buys  long-term  U.S.  Treasury  securities  guaranteed  by the
     direct full faith and credit pledge of the U.S. government.

        The fund also may buy  intermediate-term  securities  issued by the U.S.
     government,  its  agencies  and  instrumentalities.   The  U.S.  government
     provides  varying  levels  of  financial  support  to  these  agencies  and
     instrumentalities.  The fund may  invest up to 35% of its  total  assets in
     these securities.

        The fund may purchase  securities in a number of different  ways to seek
     higher  rates of return.  For  example,  by using  when-issued  and forward
     commitment  transactions,  the fund may purchase  securities  in advance to
     generate additional income.

        The weighted  average  maturity of the fund is expected to be between 20
     and 30 years.

        Additional   information  about  Long-Term  Treasury's   investments  is
     available in its annual and semiannual  reports.  In these reports you will
     find a discussion of the market  conditions and investment  strategies that
     significantly  affected  the  fund's  performance  during  the most  recent
     six-month period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *Interest  rate  changes  affect the  amount of income  the fund  generates.
     Generally,  when interest  rates rise, the fund's share value will decline.
     The opposite is true when interest rates  decline.  This interest rate risk
     is higher for Long-Term  Treasury than for funds that have shorter weighted
     average maturities, such as short-term and intermediate-term funds.

    *As with  all  funds,  at any  given  time,  the  value  of your  shares  of
     Long-Term  Treasury  may be worth more or less than the price you paid.  If
     you sell your  shares  when the value is less than the price you paid,  you
     will lose  money.  Additionally,  an  investment  in the fund is not a bank
     deposit,  nor is it insured or guaranteed by the Federal Deposit  Insurance
     Corporation or any other government agency.

     FUND PERFORMANCE

        The bar chart below shows the actual performance of Long-Term Treasury's
     Investor  Class  shares  for each  calendar  year  since its  inception  on
     September 8, 1992.  It indicates the  volatility  of the fund's  historical
     returns from year to year. Neither it nor the performance information below
     the bar chart is  intended  to  indicate  how the fund will  perform in the
     future.

     [bar chart to be filed]

     As of September  30,  1998,  the end of the most recent  calendar  quarter,
     Long-Term Treasury's year-to-date return was _____%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since its inception on September 8, 1992, are provided in
     the chart below to indicate the fund's  historical  short-term  volatility.
     Shareholders should be aware,  however, that Long-Term Treasury is intended
     for investors  with a long-term  investment  horizon and is not managed for
     short-term results.

     [bar chart to be filed]

LONG-TERM TREASURY                                 AMERICAN CENTURY INVESTMENTS


        The table below shows the average  annual return of the fund's  Investor
     Class   shares  for  the   periods   indicated.   The   Salomon  10+  Years
     Treasury/Agency Index, an unmanaged index that reflects no operating costs,
     is included for long-term performance comparisons.

                                     1 YR.     5 YRS.  10 YRS.  LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
          Long-Term Treasury         5.5%      5.5%     5.5%      5.5%
          Salomon 10+ Yrs.
            Treasury/Agency Index    6.0%      6.0%     6.0%      6.0%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.51%(1)
           Distribution and Service (12b-1) Fees           None
           Other Expenses(2)                              0.01%
           Total Annual Fund Operating Expenses           0.52%

        (1)Based on assets as of March 31, 1998. The fund's management fee
        decreases as fund assets increase.

        (2)Other   expenses   include  the  fees  and  expenses  of  the  fund's
        independent  trustees,  their legal counsel,  interest and extraordinary
        expenses.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

            1 year      3 years      5 years      10 years
           -------------------------------------------------
             $53         $167         $291         $653

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGER?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage our mutual funds. The portfolio manager on the Long-Term
     Treasury team is:

        DAVID SCHROEDER, Vice President and Senior Portfolio Manager, has been a
     member of the Long-Term  Treasury team since September 1992. Mr.  Schroeder
     joined American Century in July 1990 as a portfolio manager.

6. HOW DO I BUY FUND SHARES?

      * Complete and return the enclosed application

      * Call us and exchange shares from another American Century fund

      * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts). If the value of your account falls
     below this account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing  or calling  us. You also may  exchange  your  shares in  Long-Term
     Treasury  for shares in nearly 70 other  mutual  funds  offered by American
     Century.  Depending  on the options you select when you open your  account,
     some restrictions may apply. For your protection,  some redemption requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Long-Term Treasury pays distributions of substantially all of its income
     monthly. Distributions may be taxable as ordinary income, capital gains, or
     a  combination  of the two.  Capital  gains  are taxed at  different  rates
     depending  on the  length  of time the fund held the  securities  that were
     sold.  Distributions  are  reinvested  automatically  in additional  shares
     unless you choose another option.

        The fund's income is exempt from most state income  taxes.  Consult with
     your tax advisor to see if the fund's income is exempt in your state.


FUND PROFILE                                                 LONG-TERM TREASURY


9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

      * telephone transactions

      * wire and electronic funds transfers

      * 24-hour Automated Information Line transactions

      * 24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------

[american century logo(reg.sm)]
American
Century

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200 KANSAS CITY,
MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                        Funds Distributor, Inc.
                                 (c) 1998 American Century Services Corporation

SH-BRO-13776   9810
<PAGE>
                                  FUND PROFILE

                                    GNMA Fund

                                 INVESTOR CLASS

                                November 6, 1998

                         [american century logo(reg.sm)]
                                    American
                                     Century

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
        accessing our Web site, or visiting one of our Investor Centers.
        See the back cover for additional phone numbers and our address.

                                  BENHAM GROUP


                          AMERICAN CENTURY INVESTMENTS
                                    GNMA FUND

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        GNMA Fund seeks high current  income  while  maintaining  liquidity  and
     safety of principal by investing primarily in GNMA certificates.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund buys  certificates  issued by the Government  National Mortgage
     Association  (GNMA).  Unlike  many other  mortgage-backed  securities,  the
     timely payment of principal and interest on GNMA  certificates is backed by
     the full faith and credit of the U.S. government.  This means that the fund
     receives its share of payments regardless of whether the ultimate borrowers
     make their payments.

        The  fund  also  may  buy  short-term  securities  issued  by  the  U.S.
     government,  its agencies and instrumentalities,  including mortgage-backed
     securities.  The U.S.  government  provides  varying  levels  of  financial
     support to these agencies and instrumentalities.

        The fund may purchase  securities in a number of different  ways to seek
     higher  rates of return.  For  example,  by using  when-issued  and forward
     commitment  transactions,  the fund may purchase  securities  in advance to
     generate additional income.

        The weighted  average maturity of the fund is expected to be three years
     or less.

        Additional information about GNMA Fund's investments is available in its
     annual and semiannual  reports. In these reports you will find a discussion
     of the market  conditions  and  investment  strategies  that  significantly
     affected the fund's  performance  during the most recent six-month  period.
     You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *Interest  rate  changes  affect the  amount of income  the fund  generates.
     Generally,  when interest  rates rise, the fund's share value will decline.
     The opposite is true when interest rates  decline.  This interest rate risk
     is higher for GNMA Fund than for funds that have shorter  weighted  average
     maturities, such as money market funds.

    *GNMA Fund invests in mortgage-backed  securities. When homeowners refinance
     their  mortgages  to take  advantage  of declining  interest  rates,  their
     existing  mortgages are prepaid.  The mortgages,  which back the securities
     purchased  by GNMA Fund,  may be prepaid in this  fashion.  Because of this
     "prepayment  risk," the fund may benefit less from declining interest rates
     than other short-term funds.

    *As with all  funds,  at any given  time,  the value of your  shares of GNMA
     Fund may be worth  more or less than the  price you paid.  If you sell your
     shares when the value is less than the price you paid, you will lose money.
     Additionally,  an investment  in the fund is not a bank deposit,  nor is it
     insured or guaranteed by the Federal Deposit  Insurance  Corporation or any
     other government agency.

     FUND PERFORMANCE

        The bar chart below shows the actual performance of GNMA Fund's Investor
     Class  shares for each of the last 10  calendar  years.  It  indicates  the
     volatility of the fund's historical  returns from year to year.  Neither it
     nor the performance information below the bar chart is intended to indicate
     how the fund will perform in the future.

     [bar chart to be filed]

     As of September 30, 1998, the end of the most recent calendar quarter, GNMA
     Fund's year-to-date return was ___%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's historical short-term  volatility.  Shareholders should
     be  aware,  however,  that  GNMA  Fund is  intended  for  investors  with a
     long-term investment horizon and is not managed for short-term results.

     [bar chart to be filed]

GNMA FUND                                         AMERICAN CENTURY INVESTMENTS


        The table below shows the average  annual return of the fund's  Investor
     Class shares for the periods indicated.  The Salomon 30-year GNMA Index, an
     unmanaged index that reflects no operating costs, is included for long-term
     performance comparisons.

                                       1 YR.   5 YRS.  10 YRS.  LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
          GNMA Fund                    5.5%    5.5%     5.5%      5.5%
          Salomon 30-year GNMA Index   6.0%    6.0%     6.0%      6.0%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.59%(1)
           Distribution and Service (12b-1) Fees           None
           Other Expenses(2)                              0.00%
           Total Annual Fund Operating Expenses           0.59%

        (1)Based on assets as of March 31, 1998. The fund's management fee
        decreases as fund assets increase.

        (2)Other  expenses,  which  include the fees and  expenses of the fund's
        independent  trustees,  their legal counsel,  interest and extraordinary
        expenses, were less than 0.005% for the most recent fiscal year.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

            1 year      3 years      5 years      10 years
           -------------------------------------------------
             $60         $189         $329         $738

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage our mutual  funds.  The  portfolio  managers on the GNMA
     Fund team are:

        DAVID SCHROEDER, Vice President and Senior Portfolio Manager, has been a
     member of the GNMA Fund team since January 1996.  Mr.  Schroeder  joined in
     July 1990 as a portfolio manager.

        CASEY COLTON,  Vice President and Senior Portfolio  Manager,  has been a
     member of the GNMA Fund team since January 1994. Mr. Colton joined American
     Century in 1990 and has been a portfolio manager since 1994.

6. HOW DO I BUY FUND SHARES?

      * Complete and return the enclosed application

      * Call us and exchange shares from another American Century fund

      * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts). If the value of your account falls
     below this account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or calling us. You also may  exchange  your shares in GNMA Fund for
     shares  in  nearly 70 other  mutual  funds  offered  by  American  Century.
     Depending  on the  options  you  select  when you open your  account,  some
     restrictions  may apply.  For your  protection,  some  redemption  requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        GNMA Fund pays distributions of substantially all of its income monthly.
     Distributions  may be taxable  as  ordinary  income,  capital  gains,  or a
     combination  of the  two.  Capital  gains  are  taxed  at  different  rates
     depending  on the  length  of time the fund held the  securities  that were
     sold.  Distributions  are  reinvested  automatically  in additional  shares
     unless you choose another option.


FUND PROFILE                                                         GNMA FUND


9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

      * telephone transactions

      * wire and electronic funds transfers

      * 24-hour Automated Information Line transactions

      * 4-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

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[american century logo(reg.sm)]
American
Century

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                        Funds Distributor, Inc.
                                 (c) 1998 American Century Services Corporation

SH-BRO-13778   9810


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