AMERICAN CENTURY GOVERNMENT INCOME TRUST
497K3B, 1999-07-22
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[front cover]

AMERICAN CENTURY

Fund Profile

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

Short-Term Treasury Fund

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.

  [photos of woman and girls blowing bubbles, men talking, woman at computer]

                                                                   July 26, 1999

                                                                  INVESTOR CLASS

 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 telephone numbers and our
                                                                        address.


SHORT-TERM TREASURY FUND

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 managers buy short-term U.S. Treasury securities guaranteed by the
    direct full faith and credit pledge of the U.S. government.

    The fund  managers  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  managers  may invest up to 35% of the fund's total assets in these
    securities.

    The fund managers 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  managers  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 fiscal
    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 fund's share  value.  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.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In  summary,  Short-Term  Treasury is intended  for  investors  who seek the
    highest  level  of  current  income  exempt  from  state  income  tax  while
    maintaining  safety of  capital  and who are  willing  to  accept  the risks
    associated with the fund's investment strategy.

    FUND PERFORMANCE

    The  following  bar  chart  shows  the  actual   performance  of  Short-Term
    Treasury's  Investor  Class shares for each  calendar  year since the fund's
    inception on September 8, 1992.  The bar chart  indicates the  volatility of
    the  fund's  historical  returns  from  year to year.  The bar chart and the
    performance information below are not intended to indicate how the fund will
    perform in the future.

[data shown in bar chart]
   Calendar Year-By-Year Returns (1)
       1998     6.44%
       1997     6.11%
       1996     4.12%
       1995     9.93%
       1994     0.15%
       1993     5.32%

        (1) As of June 30, 1999,  the end of the most recent  calendar  quarter,
        Short-Term Treasury's year-to-date return was 0.57%.

    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                              Highest                 Lowest
                              -------                 ------
    Short-Term Treasury       3.14% (1Q 1995)         -0.54% (1Q 1994)


Short-Term Treasury                               American Century Investments


    The following  table shows the average annual return of the fund's  Investor
    Class  shares  for  the  periods   indicated.   The  Salomon  1-  to  3-Year
    Treasury/Agency  Index, an unmanaged index that reflects no operating costs,
    is included as a benchmark for performance comparisons. The fund's benchmark
    was  changed  from the  Lehman  1- to  3-Year  Government  Securities  Index
    beginning  January 1, 1999. The fund's advisor believes the new index better
    represents  the broad market for U.S.  Treasury and Agency  Securities.  For
    current performance information,  including yields, please call us or access
    our Web site.

                                        1 YEAR     5 YEARS      LIFE OF FUND(1)
                                        ------     -------      ---------------

     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1999)
     ---------------------------------------------------------
      Short-Term Treasury               4.15%       5.54%            4.78%

      Lehman 1- to 3-Year
         Government Securities Index    5.04%       6.30%         5.40%(2)

      Salomon 1- to 3-Year
         Treasury/Agency Index          5.09%       6.29%         5.40%(2)

        (1) The inception date for Short-Term Treasury is September 8, 1992.

        (2) Benchmark from September 30, 1992.

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 fund

    * to redeem your shares

    The following table describes the fees and expenses that you will 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 expenses  incurred  during the fund's  most  recent  fiscal
        year.  The fund has a stepped  fee  schedule.  As a result,  the  fund's
        management fee rate generally decreases as fund assets increase.

        (2)  Other  expenses  include  the  fees  and  expenses  of  the  fund's
        independent trustees,  their legal counsel and interest, are expected to
        be less than 0.005% for the current fiscal year.



           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above

             . . . your cost of investing in the fund would be:

                         1 year         3 years         5 years        10 years

                          $52            $163            $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 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  its mutual  funds.  Identified  below is the  portfolio
    manager who leads the team that manages Short-Term Treasury:

    NEWLIN RANKIN,  Senior Portfolio Manager, has been a member of the team that
    manages Short-Term  Treasury since March 1996. He joined American Century in
    1994.  He  has a  bachelor's  degree  in  decision  science  and  an  MBA in
    international finance from the University of San Francisco.

6. HOW DO I BUY FUND SHARES?

    American Century offers several ways to purchase shares

    * Complete  and return the  enclosed  application  along with an  investment
    check payable to American Century Investments

    * If you already have an American Century account, call us or access our Web
    site to 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 your redemption activity causes the value of your
    account to fall below this  account  minimum,  your  shares may be  redeemed
    involuntarily.


Short-Term Treasury                                            Fund Profile


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.

    Distributions will generally be exempt from most state income taxes. Consult
    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 will find more information about these choices in Your Guide to American
    Century  Services,  which you may request by calling us,  accessing  our Web
    site or visiting one of our Investor Centers.

    Information  contained in the services  guide pertains to  shareholders  who
    invest   directly   with   American   Century   rather   than   through   an
    employer-sponsored retirement plan or 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
    a 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

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

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

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at   WWW.AMERICANCENTURY.COM

SH-PRF-16965   9907                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

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

Intermediate-Term Treasury Fund

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.

  [photos of woman and girls blowing bubbles, men talking, woman at computer]

                                                                   July 26, 1999

                                                                  INVESTOR CLASS

 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 telephone numbers and our
                                                                        address.


INTERMEDIATE-TERM TREASURY FUND

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

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

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

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

    The fund managers 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  managers  may  invest up to 35% of the  fund's
    total assets in these securities.

    The fund managers 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  managers  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 fiscal
    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 fund's share  value.  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 money market and short-term bond 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.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In summary,  Intermediate-Term  Treasury is intended for  investors who seek
    the  highest  level of current  income  exempt  from state  income tax while
    maintaining  safety of  capital  and who are  willing  to  accept  the risks
    associated with the fund's investment strategy.

    Fund Performance

    The following bar chart shows the actual  performance  of  Intermediate-Term
    Treasury's Investor Class shares for each of the last 10 calendar years. The
    bar chart  indicates the  volatility of the fund's  historical  returns from
    year to year. The bar chart and the  performance  information  below are not
    intended to indicate how the fund will perform in the future.

[data shown in bar chart]
   Calendar Year-By-Year Returns (1)
       1998     8.94%
       1997     8.38%
       1996     4.08%
       1995     13.70%
       1994     -2.34%
       1993     7.91%
       1992     6.55%
       1991     13.75%
       1990     9.20%
       1989     11.93%

     (1)As  of June  30,  1999,  the end of the most  recent  calendar  quarter,
     Intermediate-Term Treasury's year-to-date return was -2.43%.


Intermediate-Term Treasury                    American Century Investments


    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                             Highest                 Lowest
                             -------                 ------
      Intermediate-Term
      Treasury               6.67% (2Q 1989)         -2.04% (1Q 1994)

    The following  table shows the average annual return of the fund's  Investor
    Class shares for the periods  indicated.  The Salomon 3- to 10-Year Treasury
    Index, an unmanaged index that reflects no operating costs, is included as a
    benchmark for performance comparisons.  For current performance information,
    including yields, please call us or access our Web site.

                                1 YEAR     5 YEARS    10 YEARS   LIFE OF FUND(1)
                                ------     -------    --------   ---------------

     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1999)
     ---------------------------------------------------------
     Intermediate-Term
        Treasury                2.71%       6.49%      7.06%         8.48%

     Salomon 3- to 10-Year
        Treasury Index          3.90%       7.18%      7.62%       9.49%(2)

        (1) The inception date for Intermediate-Term Treasury is May 16, 1980.

        (2) Benchmark from May 31, 1980.

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 fund

    * to redeem your shares

    The following table describes the fees and expenses that you will 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 expenses  incurred  during the fund's  most  recent  fiscal
        year. The fund has a stepped fee schedule.  As a result,  the management
        fee rate generally decreases as fund assets increase.

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

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as 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 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  its mutual  funds.  Identified  below is the  portfolio
    manager who leads the team that manages Intermediate-Term Treasury:

    Robert Gahagan,  Vice President and Portfolio Manager,  has been a member of
    the team that manages  Intermediate-Term  Treasury  since  January  1998. He
    joined American Century in 1983. He has a bachelor's degree in economics and
    an MBA from the University of Missouri-Kansas City.

6. HOW DO I BUY FUND SHARES?

    American Century offers several ways to purchase shares

    * Complete  and return the  enclosed  application  along with an  investment
    check payable to American Century Investments

    * If you already have an American Century account, call us or access our Web
    site to 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
    and Roth IRAs). If your redemption activity causes the value of your account
    to  fall  below  this   account   minimum,   your  shares  may  be  redeemed
    involuntarily.


Intermediate-Term Treasury                                     Fund Profile


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 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.

    Distributions will generally be exempt from most state income taxes. Consult
    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 will find more information about these choices in Your Guide to American
    Century  Services,  which you may request by calling us,  accessing  our Web
    site or visiting one of our Investor Centers.

    Information  contained in the services  guide pertains to  shareholders  who
    invest   directly   with   American   Century   rather   than   through   an
    employer-sponsored retirement plan or 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
    a 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

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

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

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at   WWW.AMERICANCENTURY.COM

SH-PRF-16978   9907                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

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

Long-Term Treasury Fund

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.

  [photos of woman and girls blowing bubbles, men talking, woman at computer]

                                                                   July 26, 1999

                                                                  INVESTOR CLASS

 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 telephone numbers and our
                                                                        address.



LONG-TERM TREASURY FUND

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 managers buy long-term U.S. Treasury securities  guaranteed by the
    direct full faith and credit pledge of the  U.S. government.

    The fund managers 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  managers  may  invest up to 35% of the  fund's
    total assets in agency securities.

    The fund managers 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  managers  may  purchase  securities  in
    advance to generate additional income.

    The weighted  average  maturity of the fund is expected to be between 10 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 fiscal
    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 fund's share  value.  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 money market,  short-term  and  intermediate-term  bond
    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.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In  summary,  Long-Term  Treasury  is intended  for  investors  who seek the
    highest  level of current  income  exempt from state  income tax and who are
    willing to accept the risks associated with the fund's investment strategy.

    FUND PERFORMANCE

    The following bar chart shows the actual performance of Long-Term Treasury's
    Investor  Class shares for each calendar year since the fund's  inception on
    September 8, 1992.  The bar chart  indicates  the  volatility  of the fund's
    historical  returns  from year to year.  The bar  chart and the  performance
    information  below are not intended to indicate how the fund will perform in
    the future.

[data shown in bar chart]
   Calendar Year-By-Year Returns (1)
       1998     12.76%
       1997     14.76%
       1996     -1.36%
       1995     29.25%
       1994     -9.25%
       1993     17.64%

       (1) As of June 30,  1999,  the end of the most recent  calendar  quarter,
       Long-Term Treasury's year-to-date return was -6.46%.


Long-Term Treasury                            American Century Investments


    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                              Highest                 Lowest
                              -------                 ------
    Long-Term Treasury        10.48% (2Q 1995)        -7.00% (1Q 1996)

    The following  table shows the average annual return of the fund's  Investor
    Class   shares   for  the   periods   indicated.   The   Salomon   Long-Term
    Treasury/Agency  Index, an unmanaged index that reflects no operating costs,
    is  included  as  a  benchmark  for  performance  comparisons.  For  current
    performance information,  including yields, please call us or access our Web
    site.

                                      1 YEAR      5 YEARS     LIFE OF FUND(1)
                                      ------      -------     ---------------

     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1999)
     ---------------------------------------------------------
        Long-Term Treasury           -0.48%       9.27%            7.61%

        Salomon Long-Term
           Treasury/Agency Index     -0.58%       9.80%         8.47%(2)

        (1) The inception date for Long-Term Treasury is September 8, 1992.

        (2) Benchmark from September 30, 1992.

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 fund

    * to redeem your shares

    The following table describes the fees and expenses that you will 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 expenses  incurred  during the fund's  most  recent  fiscal
        year.  The fund has a stepped  fee  schedule.  As a result,  the  fund's
        management fee rate generally decreases as fund assets increase.

        (2) Other  expenses,  which  include the fees and expenses of the fund's
        independent trustees,  their legal counsel and interest, are expected to
        be less than 0.005% for the current fiscal year.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above

             . . . your cost of investing in the fund would be:

                   1 year       3 years        5 years       10 years

                    $52          $163           $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 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  its mutual  funds.  Identified  below is the  portfolio
    manager who leads the team that manages Long-Term Treasury:

    DAVID  SCHROEDER,  Vice President and Senior Portfolio  Manager,  has been a
    member of the team that manages Long-Term  Treasury since September 1992. He
    joined  American  Century  in 1990.  He has a bachelor  of arts from  Pomona
    College.

6. HOW DO I BUY FUND SHARES?

    American Century offers several ways to purchase shares

    * Complete  and return the  enclosed  application  along with an  investment
    check payable to American Century Investments

    * If you already have an American Century account, call us or access our Web
    site to 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
    and Roth IRAs). If your redemption activity causes the value of your account
    to  fall  below  this   account   minimum,   your  shares  may  be  redeemed
    involuntarily.


Long-Term Treasury                                             Fund Profile


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.

    Distributions will generally be exempt from most state income taxes. Consult
    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 will find more information about these choices in Your Guide to American
    Century  Services,  which you may request by calling us,  accessing  our Web
    site or visiting one of our Investor Centers.

    Information  contained in the services  guide pertains to  shareholders  who
    invest   directly   with   American   Century   rather   than   through   an
    employer-sponsored retirement plan or 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
    a 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

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

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

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at   WWW.AMERICANCENTURY.COM

SH-PRF-16979   9907                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

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

Government Agency Money Market Fund

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.

  [photos of woman and girls blowing bubbles, men talking, woman at computer]

                                                                   July 26, 1999

                                                                  INVESTOR CLASS

 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 telephone numbers and our
                                                                        address.


GOVERNMENT AGENCY MONEY MARKET FUND

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,   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  managers  buy  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 managers 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 managers 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 manager may purchase securities in advance
    to generate additional income.

    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 fiscal
    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,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) 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 following bar chart shows the actual  performance  of Government  Agency
    Money  Market's  Investor  Class  shares  for each  year  since  the  fund's
    inception on December 5, 1989. The bar chart indicates the volatility of the
    fund's  historical  returns  from  year  to  year.  The  bar  chart  and the
    performance information below are not intended to indicate how the fund will
    perform in the future.

[data shown in bar chart]
   Calendar Year-By-Year Returns (1)
       1998     5.07%
       1997     5.07%
       1996     4.93%
       1995     5.50%
       1994     3.75%
       1993     2.68%
       1992     3.39%
       1991     6.01%
       1990     8.34%

        (1) As of June 30, 1999,  the end of the most recent  calendar  quarter,
        Government Agency Money Market's year-to-date return was 2.21%.

    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                              Highest                 Lowest
                              -------                 ------
    Government Agency
    Money Market              2.06% (1Q 1990)         0.65% (2Q 1993)

    The following  table shows the average annual return of the fund's  Investor
    Class shares for the periods  indicated.  The 90-Day Treasury Bill Index, an
    unmanaged index that reflects no operating costs, is included as a benchmark
    for performance comparisons. For current performance information,  including
    yields, please call us or access our Web site.


Government Agency Money Market                American Century Investments


                                         1 YEAR    5 YEARS    LIFE OF FUND(1)
                                         ------    -------    ---------------

     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1999)
     ---------------------------------------------------------
         Government Agency
            Money Market                 4.74%      5.00%         4.96%

         90-Day Treasury Bill Index      4.58%      5.11%      4.95%(2)

        (1) The inception date for Government Agency Money Market is December 5,
        1989.

        (2) Benchmark from December 31, 1989.

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 fund

    * to redeem your shares

    The following table describes the fees and expenses that you will pay if you
    buy and hold shares of the fund.


     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
     ---------------------------------------------

               Management Fee                                        0.47%(1)

               Distribution and Service (12b-1) Fees                 None

               Other Expenses(2)                                     0.00%

               Total Annual Fund Operating Expenses                  0.47%


        (1) Based on expenses  incurred  during the fund's  most  recent  fiscal
        year.  The fund has a stepped  fee  schedule.  As a result,  the  fund's
        management fee rate generally decreases as fund assets increase.

        (2) Other  expenses,  which  include the fees and expenses of the fund's
        independent trustees,  their legal counsel and interest, are expected to
        be less than 0.005% for the current fiscal year.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above

             . . . your cost of investing in the fund would be:

                           1 year        3 years       5 years        10 years

                            $48           $151          $263            $591

            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 its mutual  funds.  Identified  below are the  portfolio
    managers that manage Government Agency Money Market:

    BETH BUNNELL HUNTER,  Portfolio Manager,  has been a member of the team that
    manages  Government  Agency Money Market since joining  American  Century in
    July 1999.  Before joining  American  Century,  she worked for Calvert Asset
    Management Company as a Portfolio Trading Analyst from 1994 to 1996 and as a
    Portfolio  Manager  from 1996 to June 1999.  She has a bachelor of arts from
    the University of Washington-Seattle.

    DENISE  TABACCO,  Portfolio  Manager,  has  been a member  of the team  that
    manages  Government  Agency Money Market since May 1996. She joined American
    Century in 1988, becoming a member of its portfolio  department in 1991. She
    was promoted to Portfolio  Manager in 1995.  She has a bachelor's  degree in
    accounting from San Diego  University and an MBA in finance from Golden Gate
    University.

6. HOW DO I BUY FUND SHARES?

    American Century offers several ways to purchase shares

    * Complete  and return the  enclosed  application  along with an  investment
    check payable to American Century Investments

    * If you already have an American Century account, call us or access our Web
    site to 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 your redemption activity causes the value of your
    account to fall 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.


Government Agency Money Market                                 Fund Profile


8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

    Dividends  are  declared  and  available  for  redemption   daily.   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.  Distributions are reinvested  automatically in additional shares
    unless you choose another option.

    Distributions will generally be exempt from most state income taxes. Consult
    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 will find more information about these choices in Your Guide to American
    Century  Services,  which you may request by calling us,  accessing  our Web
    site or visiting one of our Investor Centers.

    Information  contained in the services  guide pertains to  shareholders  who
    invest   directly   with   American   Century   rather   than   through   an
    employer-sponsored retirement plan or 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
    a 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

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

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

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at   WWW.AMERICANCENTURY.COM

SH-PRF-16964   9907                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

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

Short-Term Government Fund

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.

  [photos of woman and girls blowing bubbles, men talking, woman at computer]

                                                                   July 26, 1999

                                                                  INVESTOR CLASS

 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 telephone numbers and our
                                                                        address.


SHORT-TERM GOVERNMENT FUND

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 managers 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 managers 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 managers 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  managers  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 fiscal
    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 fund's share  value.  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.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In summary,  Short-Term  Government  is intended for investors who seek high
    current income that is consistent  with  investment in securities  issued by
    the U.S. government and its agencies and who are willing to accept the risks
    associated with the fund's investment strategy.

    FUND PERFORMANCE

    The  following  bar  chart  shows  the  actual   performance  of  Short-Term
    Government's  Investor Class shares for each of the last 10 calendar  years.
    The bar chart indicates the volatility of the fund's historical returns from
    year to year. The bar chart and the  performance  information  below are not
    intended to indicate how the fund will perform in the future.

[data shown in bar chart]
   Calendar Year-By-Year Returns (1)
       1998      6.04%
       1997      6.02%
       1996      4.11%
       1995     10.51%
       1994     -0.49%
       1993      4.17%
       1992      4.39%
       1991     11.64%
       1990      7.53%
       1989      9.99%

       (1) As of June 30,  1999,  the end of the most recent  calendar  quarter,
       Short-Term Government's year-to-date return was -0.04%.


Short-Term Government                         American Century Investments


    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                                Highest                 Lowest
                                -------                 ------
    Short-Term Government       5.13% (2Q 1989)         -1.03% (1Q 1994)

    The following  table shows the average annual return of the fund's  Investor
    Class  shares  for  the  periods   indicated.   The  Salomon  1-  to  3-Year
    Treasury/Agency  Index, an unmanaged index that reflects no operating costs,
    is  included  as  a  benchmark  for  performance  comparisons.  For  current
    performance information,  including yields, please call us or access our Web
    site.

                                1 YEAR    5 YEARS   10 YEARS  LIFE OF FUND(1)
                                ------    -------   --------  ---------------

     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1999)
     ---------------------------------------------------------
        Short-Term
           Government           3.13%      5.44%     5.69%         6.93%

        Salomon 1- to 3-Year
           Treasury/Agency
           Index                5.09%      6.29%     6.82%      8.07%(2)

        (1) The inception date for Short-Term Government is December 15, 1982.

        (2) Benchmark from December 31, 1982.

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 fund

    * to redeem your shares

    The following table describes the fees and expenses that you will 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 expenses  incurred  during the fund's  most  recent  fiscal
        year.  The fund has a stepped  fee  schedule.  As a result,  the  fund's
        management fee rate generally decreases as fund assets increase.

        (2) Other  expenses,  which  include the fees and expenses of the fund's
        independent directors, their legal counsel and interest, are expected to
        be less than 0.005% for the current fiscal year.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above

             . . . your cost of investing in the fund would be:

                   1 year          3 years        5 years        10 years

                    $60             $189           $329            $736

             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  its mutual  funds.  Identified  below is the  portfolio
    manager who leads the team that manages Short-Term Government:

    NEWLIN RANKIN,  Senior Portfolio Manager, has been a member of the team that
    manages Short-Term Government since January 1995. He joined American Century
    in 1994.  He has a  bachelor's  degree  in  decision  science  and an MBA in
    international finance from the University of San Francisco.

6. HOW DO I BUY FUND SHARES?

    American Century offers several ways to purchase shares

    * Complete  and return the  enclosed  application  along with an  investment
    check payable to American Century Investments

    * If you already have an American Century account, call us or access our Web
    site to 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
    and Roth IRAs). If your redemption activity causes the value of your account
    to  fall  below  this   account   minimum,   your  shares  may  be  redeemed
    involuntarily.


Short-Term Government                                          Fund Profile


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.

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

    Information  contained in the services  guide pertains to  shareholders  who
    invest   directly   with   American   Century   rather   than   through   an
    employer-sponsored retirement plan or 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
    a 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

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

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

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at   WWW.AMERICANCENTURY.COM

SH-PRF-16980   9907                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

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

GNMA Fund

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.

  [photos of woman and girls blowing bubbles, men talking, woman at computer]

                                                                   July 26, 1999

                                                                  INVESTOR CLASS

 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 telephone numbers and our
                                                                        address.



GNMA FUND

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

    GNMA 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  managers  primarily  buy  certificates  issued  by the  Government
    National  Mortgage  Association  (GNMA).  Unlike many other  mortgage-backed
    securities,   the  timely   payment  of  principal  and  interest  on  these
    certificates  is guaranteed by GNMA.  GNMA's  payment  guarantee is stronger
    than most other government  agencies' because it is backed by the full faith
    and credit of the U.S. government. This means that the fund managers receive
    the fund's share of payments  regardless  of whether the ultimate  borrowers
    make their payments.

    The fund managers may also buy short-term U.S.  government securities. The
    U.S. government, its agencies  and instrumentalities issue these securities.
    These securities include mortgage-backed securities. The U.S. government's
    financial support of these agencies and instrumentalities varies.

    The fund managers 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  managers  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'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 fiscal period. You may get these
    reports at no cost by calling us.

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

    * When  interest  rates  change,  the fund's  share value will be  affected.
    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  than  for  funds  that  have  shorter   weighted  average
    maturities, such as money market funds.

    * GNMA 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,  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 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.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In summary, GNMA is intended for investors who seek high current income that
    is consistent  with investment in GNMA  certificates  and who are willing to
    accept the risks associated with the fund's investment strategy.

    FUND PERFORMANCE

    The  following  bar chart shows the actual  performance  of GNMA's  Investor
    Class shares for each of the last 10 calendar years. The bar chart indicates
    the volatility of the fund's  historical  returns from year to year. The bar
    chart and the performance information below are not intended to indicate how
    the fund will perform in the future.

[data shown in bar chart]
   Calendar Year-By-Year Returns (1)
       1998     6.33%
       1997     8.79%
       1996     5.21%
       1995     15.86%
       1994     -1.67%
       1993     6.59%
       1992     7.67%
       1991     15.56%
       1990     10.15%
       1989     13.90%

        (1) As of June 30, 1999,  the end of the most recent  calendar  quarter,
        GNMA's year-to-date return was -0.02%.


GNMA                                                American Century Investments


    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                              Highest                 Lowest
                              -------                 ------
    GNMA                      7.68% (2Q 1989)         -2.39% (1Q 1994)

    The following  table shows the average annual return of the fund's  Investor
    Class shares for the periods  indicated.  The Salomon  Brothers 30-year GNMA
    Index, an unmanaged index that reflects no operating costs, is included as a
    benchmark for performance comparisons.  For current performance information,
    including yields, please call us or access our Web site.

                                  1 YEAR    5 YEARS   10 YEARS  LIFE OF FUND(1)
                                  ------    -------   --------  ---------------

     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1999)
     ---------------------------------------------------------
        GNMA                      3.12%     7.36%      7.81%         8.37%

        Salomon Brothers
           30-Year GNMA Index     4.14%     8.04%      8.37%      9.27%(2)

        (1) The inception date for GNMA is September 23, 1985.

        (2) Benchmark from September 30, 1985.

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 fund

    * to redeem your shares

    The following table describes the fees and expenses that you will 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 expenses  incurred  during the fund's  most  recent  fiscal
        year.  The fund has a stepped  fee  schedule.  As a result,  the  fund's
        management fee rate generally decreases as fund assets increase.

        (2) Other  expenses,  which  include the fees and expenses of the fund's
        independent trustees,  their legal counsel and interest, are expected to
        be less than 0.005% for the current fiscal year.


           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above

             . . . your cost of investing in the fund would be:

                       1 year        3 years       5 years        10 years

                        $60           $189          $329            $736

             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  its mutual  funds.  Identified  below is the  portfolio
    manager who leads the team that manages GNMA:

    CASEY COLTON, Vice President and Senior Portfolio Manager, has been a member
    of the team that manages GNMA since January 1994. He joined American Century
    in 1990. He has a bachelor's degree in business administration from San Jose
    State University and an MBA from the University of Southern  California.  He
    is a Chartered Financial Analyst and a Certified Public Accountant.

6. HOW DO I BUY FUND SHARES?

    American Century offers several ways to purchase shares

    * Complete  and return the  enclosed  application  along with an  investment
    check payable to American Century Investments

    * If you already have an American Century account, call us or access our Web
    site to 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 your redemption activity causes the value of your
    account to fall below this  account  minimum,  your  shares may be  redeemed
    involuntarily.


GNMA                                                           Fund Profile


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 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  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.

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

    Information  contained in the services  guide pertains to  shareholders  who
    invest   directly   with   American   Century   rather   than   through   an
    employer-sponsored retirement plan or 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
    a 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

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

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

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at WWW.AMERICANCENTURY.COM


SH-PRF-16973   9907                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

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

Inflation-Adjusted Treasury Fund

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.

  [photos of woman and girls blowing bubbles, men talking, woman at computer]

                                                                   July 26, 1999

                                                                  INVESTOR CLASS

 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 telephone numbers and our
                                                                        address.


INFLATION-ADJUSTED TREASURY FUND

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

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

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

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

    The fund managers also may buy traditional U.S. Treasury securities that are
    not  inflation-indexed.  The fund  managers  also may buy  inflation-indexed
    securities  issued  by U.S.  government  agencies  and  government-sponsored
    organizations.

    The fund managers 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  managers  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 fiscal
    period. You may get these reports at no cost by calling us.

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

    *  Inflation-indexed  securities  are  designed to offer a return  linked to
    inflation, which protects future purchasing power from effects of inflation.
    Inflation-indexed   securities   may  not   trade  at  their   face   value.
    Inflation-indexed  securities  trade at prevailing real, or after inflation,
    interest  rates.  Changes in real  interest  rates  affect the fund's  share
    value.

    * 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.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In summary,  Inflation-Adjusted  Treasury is intended for investors who seek
    total  return  that  is  consistent   with   investment  in  U.S.   Treasury
    inflation-indexed  securities  and who  are  willing  to  accept  the  risks
    associated with the fund's investment strategy.

    FUND PERFORMANCE

    The following bar chart shows the actual  performance of  Inflation-Adjusted
    Treasury's  Investor  Class shares for each  calendar  year since the fund's
    inception on February 10, 1997.  The bar chart  indicates the  volatility of
    the  fund's  historical  returns  from  year to year.  The bar chart and the
    performance information below are not intended to indicate how the fund will
    perform in the future.

[data shown in bar chart]
   Calendar Year-By-Year Returns (1)
       1998     3.45%

       (1) As of June 30,  1999,  the end of the most recent  calendar  quarter,
       Inflation-Adjusted Treasury's year-to-date return was 1.52%.

    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                                  Highest               Lowest
                                  -------               ------
    Inflation-Adjusted Treasury   2.27% (3Q 1998)       -0.37 (4Q 1998)

    The following  table shows the average annual return of the fund's  Investor
    Class shares for the periods indicated. The Salomon 10+ Years Treasury Index
    and the Salomon  U.S.  Inflation-Linked  Index are  unmanaged  indices  that
    reflect no operating  costs and are included as a benchmark for  performance
    comparisons.  For current performance information,  including yields, please
    call us or access our Web site.


Inflation-Adjusted Treasury                   American Century Investments


                                                   1 YEAR      LIFE OF FUND(1)
                                                   ------      ---------------

     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1999)
     ---------------------------------------------------------
        Inflation-Adjusted Treasury                 3.45%          2.51%

        Salomon U.S. Inflation-Linked Index         4.15%       3.40%(2)

        Salomon 10+ Years Treasury Index           -0.28%       9.22%(2)

        (1) The inception date for  Inflation-Adjusted  Treasury is February 10,
        1997.

        (2) Benchmark from February 28, 1997.

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 fund

    * to redeem your shares

    The following table describes the fees and expenses that you will 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 expenses  incurred  during the fund's  most  recent  fiscal
        year.  The fund has a stepped  fee  schedule.  As a result,  the  fund's
        management fee rate generally decreases as fund assets increase.

        (2) Other  expenses,  which  include the fees and expenses of the fund's
        independent trustees,  their legal counsel and interest, are expected to
        be less than 0.005% for the current fiscal year.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above

             . . . your cost of investing in the fund would be:

                   1 year         3 years         5 years         10 years

                    $52            $163            $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 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  its mutual  funds.  Identified  below is the  portfolio
    manager who leads the team that manages Inflation-Adjusted Treasury:

    DAVID  SCHROEDER,  Vice President and Senior Portfolio  Manager,  has been a
    member  of the team  that  manages  Inflation-Adjusted  Treasury  since  its
    inception in February  1997.  He joined  American  Century in 1990. He has a
    bachelor of arts from Pomona College.

6. HOW DO I BUY FUND SHARES?

    American Century offers several ways to purchase shares

    * Complete  and return the  enclosed  application  along with an  investment
    check payable to American Century Investments

    * If you already have an American Century account, call us or access our Web
    site to 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
    and Roth IRAs). If your redemption activity causes the value of your account
    to  fall  below  this   account   minimum,   your  shares  may  be  redeemed
    involuntarily.


Inflation-Adjusted Treasury                                    Fund Profile


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.

    Distributions will generally be exempt from most state income taxes. Consult
    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 will find more information about these choices in Your Guide to American
    Century  Services,  which you may request by calling us,  accessing  our Web
    site or visiting one of our Investor Centers.

    Information  contained in the services  guide pertains to  shareholders  who
    invest   directly   with   American   Century   rather   than   through   an
    employer-sponsored retirement plan or 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
    a 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

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

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

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at   WWW.AMERICANCENTURY.COM

SH-PRF-16981   9907                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

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

Capital Preservation Fund

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.

  [photos of woman and girls blowing bubbles, men talking, woman at computer]

                                                                   July 26, 1999

                                                                  INVESTOR CLASS

 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 telephone numbers and our
                                                                        address.


CAPITAL PRESERVATION FUND

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 managers 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 managers 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  managers  may  purchase  securities  in
    advance to generate additional income.

    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 fiscal
    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,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) 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   following   bar  chart  shows  the  actual   performance   of  Capital
    Preservation's Investor Class shares for each of the last 10 calendar years.
    The bar chart indicates the volatility of the fund's historical returns from
    year to year. The bar chart and the  performance  information  below are not
    intended to indicate how the fund will perform in the future.

[data shown in bar chart]
   Calendar Year-By-Year Returns (1)
       1998     4.92%
       1997     4.97%
       1996     4.85%
       1995     5.32%
       1994     3.63%
       1993     2.65%
       1992     3.31%
       1991     5.62%
       1990     7.64%
       1989     8.28%

        (1) As of June 30, 1999,  the end of the most recent  calendar  quarter,
        Capital Preservation's year-to-date return was 2.08%.

    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                              Highest                 Lowest
                              -------                 ------
    Capital Preservation      2.12% (2Q 1989)         0.63% (2Q 1993)

    The following  table shows the average annual return of the fund's  Investor
    Class shares for the periods  indicated.  The 90-Day Treasury Bill Index, an
    unmanaged index that reflects no operating costs, is included as a benchmark
    for performance comparisons. For current performance information,  including
    yields, please call us or access our Web site.

                                  1 YEAR    5 YEARS    10 YEARS  LIFE OF FUND(1)
                                  ------    -------    --------  ---------------

     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1999)
     ---------------------------------------------------------
        Capital Preservation      4.52%      4.86%      4.89%        5.29%

        90-Day Treasury
           Bill Index             4.58%      5.11%      5.11%     7.02%(2)

        (1) The inception date for Capital Preservation is October 13, 1972.

        (2) Benchmark from October 31, 1972.


Capital Preservation                          American Century Investments


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 fund

    * to redeem your shares

    The following table describes the fees and expenses that you will pay if you
    buy and hold shares of the fund.


     ANNUAL FUND OPERATING EXPENSES

     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)

               Management Fee                                0.47%(1)

               Distribution and Service (12b-1) Fees             None

               Other Expenses(2)                                0.00%

               Total Annual Fund Operating Expenses             0.47%


        (1) Based on expenses  incurred  during the fund's  most  recent  fiscal
        year.  The fund has a stepped  fee  schedule.  As a result,  the  fund's
        management fee rate generally decreases as fund assets increase.

        (2) Other  expenses,  which  include the fees and expenses of the fund's
        independent trustees,  their legal counsel and interest, are expected to
        be less than 0.005% for the current fiscal year.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above

             . . . your cost of investing in the fund would be:

                         1 year      3 years      5 years     10 years

                          $48         $151         $263         $591

            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 its mutual  funds.  Identified  below are the  portfolio
    managers that manage Capital Preservation:

    BETH BUNNELL HUNTER,  Portfolio Manager,  has been a member of the team that
    manages the Capital Preservation Fund since joining American Century in July
    1999.  Before  joining  American  Century,  she  worked  for  Calvert  Asset
    Management company as a Portfolio Trading Analyst from 1994 to 1996 and as a
    Portfolio  Manager  from 1996 to June 1999.  She has a bachelor of arts from
    the University of Washington-Seattle.

    DENISE  TABACCO,  Portfolio  Manager,  has  been a member  of the team  that
    manages Capital  Preservation since May 1996. She joined American Century in
    1988,  becoming  a member  of its  portfolio  department  in  1991.  She was
    promoted  to  Portfolio  Manager  in 1995.  She has a  bachelor's  degree in
    accounting from San Diego  University and an MBA in finance from Golden Gate
    University.

6. HOW DO I BUY FUND SHARES?

    American Century offers several ways to purchase shares

    * Complete  and return the  enclosed  application  along with an  investment
    check payable to American Century Investments

    * If you already have an American Century account, call us or access our Web
    site to 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 your redemption activity causes the value of your
    account to fall below this  account  minimum,  your  shares may be  redeemed
    involuntarily.


Capital Preservation                                              Fund Profile


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.

    Distributions will generally be exempt from most state income taxes. Consult
    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 will find more information about these choices in Your Guide to American
    Century  Services,  which you may request by calling us,  accessing  our Web
    site or visiting one of our Investor Centers.

    Information  contained in the services  guide pertains to  shareholders  who
    invest   directly   with   American   Century   rather   than   through   an
    employer-sponsored retirement plan or 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
    a 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

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

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

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at   WWW.AMERICANCENTURY.COM


SH-PRF-16963   9907                                   Funds Distributor, Inc.


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