AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
497K2, 1998-08-13
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                                  FUND PROFILE


                                  Equity Growth

                                 INVESTOR CLASS

                                 August 10, 1998


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

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


                             AMERICAN CENTURY GROUP



                          AMERICAN CENTURY INVESTMENTS
                                  EQUITY GROWTH

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Equity Growth seeks capital appreciation by investing  in common stocks.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The  fund's  investment   strategy  utilizes   quantitative   management
     techniques in a two-step process that draws heavily on computer technology.
     In the first step,  the fund  managers  rank  stocks,  primarily  the 1,500
     largest  publicly  traded  companies in the United States  (measured by the
     value of their stock),  from most attractive to least  attractive.  This is
     determined by using a computer  model that  combines  measures of a stock's
     value, as well as measures of its growth  potential.  To measure value, the
     managers use ratios of stock  price-to-book  value and stock  price-to-cash
     flow, among others. To measure growth,  the managers use, among others, the
     rate  of  growth  of a  company's  earnings  and  changes  in the  earnings
     estimates for a company.

        In the second  step,  the  managers  use a  technique  called  portfolio
     optimization.  In  portfolio  optimization,  the managers use a computer to
     build a portfolio  of stocks  that they  believe  will  provide the optimal
     balance between risk and expected  return of the portfolio,  as measured in
     the stock ranking completed in the first step. The goal is to create a fund
     that  provides  better  returns  than  the S&P 500 but  without  taking  on
     significant additional risk.

        The fund may invest in securities other than stocks, such as convertible
     securities,  foreign securities,  short-term  instruments and non-leveraged
     stock index futures contracts.  "Non-leveraged" means that the fund may not
     invest in futures  contracts  where it would be  possible to lose more than
     the fund invested.

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

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

    *The value of Equity  Growth's shares depends on the value of the stocks and
     other  securities it owns.  The value of the individual  securities  Equity
     Growth  owns  will  go up and  down  depending  on the  performance  of the
     companies  that issued them,  general market and economic  conditions,  and
     investor confidence.

    *Market  performance  tends  to be  cyclical,  and  in the  various  cycles,
     certain  investment  styles may fall in and out of favor.  If the market is
     not  favoring the fund's  style,  the fund's gains may not be as big as, or
     its  losses  may  be  bigger  than,  other  equity  funds  using  different
     investment styles.

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

    *Although  the fund  managers  invest the fund's  assets  primarily  in U.S.
     stocks,  Equity  Growth can  invest in  securities  of  foreign  companies.
     Foreign securities can have certain unique risks, including fluctuations in
     currency  exchange  rates,  political  and economic  developments,  reduced
     availability  of public  information  and the fact that foreign issuers are
     not  required  to abide  by the  same  financial  reporting  or  regulatory
     practices as U.S. issuers.

     FUND PERFORMANCE

        The  bar  chart  at the  top of the  following  page  shows  the  actual
     performance of Equity Growth's Investor Class shares for each calendar year
     since its  inception on May 9, 1991.  It indicates  the  volatility  of the
     fund's historical  returns from year to year.  Neither it nor the quarterly
     information  below the bar chart is intended to indicate  how the fund will
     perform in the future.


Equity Growth                                       American Century Investments

[bar chart]
CALENDAR YEAR-BY-YEAR RETURNS
     1992      1993       1994      1995       1996      1997
     4.13      11.42     -0.23      34.56      27.34      36.06

     As of June 30, 1998, the end of the most recent  calendar  quarter,  Equity
     Growth's year-to-date return was 18.34%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar quarter since the fund's inception on May 9, 1991, are provided in
     the chart below to indicate  the fund's  potential  short-term  volatility.
     Shareholders should be aware,  however,  that Equity Growth is intended for
     investors  with a  long-term  investment  horizon  and is not  managed  for
     short-term results.

[bar chart]
HIGHEST AND LOWEST QUARTERLY RETURNS
       Quarter Ended 3/31/98        15.86%
       Quarter Ended 3/31/92       - 5.27%

        The table below shows the average  annual return of the fund's  Investor
     Class  shares for the periods  indicated.  The S&P 500 Index,  an unmanaged
     index that  reflects no  operating  costs,  is included as a benchmark  for
     long-term  performance  comparisons because it is viewed as a proxy for the
     entire U.S. stock market.

                                  1 YR.         5 YRS.     LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
                  Equity Growth   37.74%        23.61%        20.34%
                  S&P 500 Index   30.03%        23.03%        19.38%

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

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

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.70%(1)
           Distribution and Service (12b-1) Fees          None
           Other Expenses(2)                              0.01%
           Total Annual Fund Operating Expenses           0.71%

        (1)Based upon assets at December 31, 1997. The fund's management fee
        decreases as fund assets increase.

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

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

              1 year      3 years      5 years      10 years
              ------------------------------------------------
               $72         $227         $394         $880

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

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

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



Fund Profile                                                      Equity Growth


        JEFFREY R. TYLER,  Senior Vice President and Portfolio  Manager,  joined
     the team  managing  Equity  Growth in June 1997.  He has been with American
     Century as a portfolio manager since 1988.

        WILLIAM MARTIN,  Vice President and Portfolio  Manager,  joined the team
     managing Equity Growth in May 1997. He has been with American  Century as a
     portfolio manager since 1989.

6. HOW DO I BUY FUND SHARES?

     *    Complete and return the enclosed application

     *    Call us and exchange shares from another American Century fund

     *    Call us and send your investment by bank wire transfer

        Your initial  investment  must be $2,500 ($1,000 for  traditional  IRAs,
     Roth IRAs and  UGMA/UTMA  accounts),  unless  you  establish  an  automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls below the 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 Equity  Growth
     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?

        Equity  Growth pays  distributions  of  substantially  all of its income
     quarterly. Distributions from realized capital gains are paid twice a year,
     usually in March and  December.  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 may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

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

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


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

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


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

WWW.AMERICANCENTURY.COM

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

AUTOMATED INFORMATION LINE
1-800-345-8765


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

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

FAX
816-340-7962

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

SH-BRO-12621   9808
<PAGE>
                                  FUND PROFILE


                                 Income & Growth

                                 INVESTOR CLASS

                                 August 10, 1998


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


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


                             AMERICAN CENTURY GROUP




                          AMERICAN CENTURY INVESTMENTS
                                 INCOME & GROWTH

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Income & Growth  seeks  dividend  growth,  current  income  and  capital
     appreciation by investing in common stocks.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The  fund's  investment   strategy  utilizes   quantitative   management
     techniques in a two-step process that draws heavily on computer technology.
     In the first step,  the fund  managers  rank  stocks,  primarily  the 1,500
     largest  publicly  traded  companies in the United States  (measured by the
     value of their stock),  from most attractive to least  attractive.  This is
     determined by using a computer  model that  combines  measures of a stock's
     value, as well as measures of its growth  potential.  To measure value, the
     managers use ratios of stock  price-to- book value and stock  price-to-cash
     flow, among others. To measure growth,  the managers use, among others, the
     rate  of  growth  of a  company's  earnings  and  changes  in the  earnings
     estimates for a company.

        In the second  step,  the  managers  use a  technique  called  portfolio
     optimization.  In  portfolio  optimization,  the managers use a computer to
     build a portfolio  of stocks  that they  believe  will  provide the optimal
     balance  between risk and expected  return of the  portfolio as measured in
     the stock ranking completed in the first step. The goal is to create a fund
     that  provides  better  returns  than  the S&P 500 but  without  taking  on
     significant  additional  risk.  When  building  the fund's  portfolio,  the
     managers also attempt to create for the fund a dividend  yield that will be
     greater than that of the S&P 500.

        The fund may invest in securities other than stocks, such as convertible
     securities,  foreign securities,  short-term  instruments and non-leveraged
     stock index futures contracts.  "Non-leveraged" means that the fund may not
     invest in futures  contracts  where it would be  possible to lose more than
     the fund invested.

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

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

    *The value of Income &  Growth's  shares  depends on the value of the stocks
     and other securities it owns. The value of the individual securities Income
     & Growth  owns  will go up and down  depending  on the  performance  of the
     companies  that issued them,  general market and economic  conditions,  and
     investor confidence.

    *Market  performance  tends  to be  cyclical,  and  in the  various  cycles,
     certain  investment  styles may fall in and out of favor.  If the market is
     not  favoring the fund's  style,  the fund's gains may not be as big as, or
     its  losses  may  be  bigger  than,  other  equity  funds  using  different
     investment styles.

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

    *Although  the fund  managers  invest the fund's  assets  primarily  in U.S.
     stocks,  Income & Growth can  invest in  securities  of foreign  companies.
     Foreign securities can have certain unique risks, including fluctuations in
     currency  exchange  rates,  political  and economic  developments,  reduced
     availability  of public  information  and the fact that foreign issuers are
     not  required  to abide  by the  same  financial  reporting  or  regulatory
     practices as U.S. issuers.

     Fund Performance

        The  bar  chart  at the  top of the  following  page  shows  the  actual
     performance  of Income & Growth's  Investor  Class shares for each calendar
     year since its inception on December 17, 1990. It indicates the  volatility
     of the  fund's  historical  returns  from year to year.  Neither it nor the
     quarterly  information  below the bar chart is intended to indicate how the
     fund will perform in the future.


Income & Growth                                     American Century Investments

[bar chart]
CALENDAR YEAR-BY-YEAR RETURNS
     1991      1992     1993      1994     1995     1996     1997
     39.08     7.86     11.31    -0.55     36.88    24.15    34.45

     As of June 30, 1998, the end of the most recent calendar quarter,  Income &
     Growth's year-to-date return was 17.79%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter  since the fund's  inception on December  17,  1990,  are
     provided  in the chart below to indicate  the fund's  potential  short-term
     volatility.  Shareholders should be aware, however, that Income & Growth is
     intended  for  investors  with a  long-term  investment  horizon and is not
     managed for short-term results.

[bar chart]
     HIGHEST AND LOWEST QUARTERLY RETURNS
        Quarter Ended 3/31/91       17.72%
        Quarter Ended 3/31/94      - 4.50%

        The table below shows the average  annual  return of the fund'  Investor
     Class  shares for the periods  indicated.  The S&P 500 Index,  an unmanaged
     index that  reflects no  operating  costs,  is included as a benchmark  for
     long-term  performance  comparisons because it is viewed as a proxy for the
     entire U.S. stock market.

                                    1 YR.      5 YRS.    LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
             Income & Growth        34.49%     22.66%       22.19%
             S&P 500 Index          30.03%     23.03%       21.12%

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

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

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.70%(1)
           Distribution and Service (12b-1) Fees          None
           Other Expenses(2)                              0.01%
           Total Annual Fund Operating Expenses           0.71%

        (1)Based upon assets at December 31, 1997. The fund's management fee
        decreases as fund assets increase.

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

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

          1 year       3 years      5 years      10 years
          -------------------------------------------------
           $72          $227         $394         $880

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

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

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


Fund Profile                                                    Income & Growth


        JOUN SCHNIEDWIND,  Senior Vice President and Group  Leader--Quantitative
     Equity,  has been a member of the team that  manages  Income & Growth since
     its inception.  Mr.  Schniedwind  joined American  Century in 1982 and also
     supervises other portfolio management teams.

        KURT  BORGWARDT,  Vice  President,  Portfolio  Manager  and  Director of
     Quantitative  Equity  Research,  joined  American  Century  in 1990 and has
     managed the quantitative equity research effort since then.

6. HOW DO I BUY FUND SHARES?

     *    Complete and return the enclosed application

     *    Call us and exchange shares from another American Century fund

     *    Call us and send your investment by bank wire transfer

        Your initial  investment  must be $2,500 ($1,000 for  traditional  IRAs,
     Roth IRAs and  UGMA/UTMA  accounts),  unless  you  establish  an  automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls below the 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 Income & Growth
     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?

        Income & Growth pays  distributions of  substantially  all of its income
     quarterly. Distributions from realized capital gains are paid twice a year,
     usually in March and  December.  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 may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

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

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

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

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


American Century Investments
P.O. Box 419200
Kansas City, Missouri 64141-6200

www.americancentury.com

Investor Services
1-800-345-2021 or 816-531-5575

Automated Information Line
1-800-345-8765


Institutional, Corporate, Keogh, SEP/SARSEP,
SIMPLE and 403(b) Services
1-800-345-3533

Telecommunications Device for the Deaf
1-800-634-4113 or 816-444-3485

Fax
816-340-7962

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

SH-BRO-12620   9808
<PAGE>
                                  FUND PROFILE


                                    Small Cap
                                  Quantitative

                                 INVESTOR CLASS

                                 August 10, 1998


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

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


                             AMERICAN CENTURY GROUP



                          AMERICAN CENTURY INVESTMENTS
                             SMALL CAP QUANTITATIVE

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Small Cap Quantitative seeks capital appreciation by investing in common
     stocks.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The  fund's  investment   strategy  utilizes   quantitative   management
     techniques in a two-step process that draws heavily on computer technology.
     In the  first  step,  the fund  managers  rank  stocks,  primarily  smaller
     companies  (measured by the value of their stock),  from most attractive to
     least  attractive.  This is  determined  by  using a  computer  model  that
     combines  measures  of a stock's  value,  as well as measures of its growth
     potential. To measure value, the managers use ratios of stock price-to-book
     value and stock  price-to-cash  flow, among others. To measure growth,  the
     managers use, among others,  the rate of growth of a company's earnings and
     changes in the earnings estimates for a company.

        In the second  step,  the  managers  use a  technique  called  portfolio
     optimization.  In  portfolio  optimization,  the managers use a computer to
     build a portfolio  of stocks  that they  believe  will  provide the optimal
     balance between risk and expected  return of the portfolio,  as measured in
     the stock ranking completed in the first step. The goal is to create a fund
     that provides  better returns than the S&P Small-Cap 600 but without taking
     on significant additional risk.

        The fund invests  primarily in common stocks of companies  which, at the
     time of investment, have market capitalization not greater than that of the
     largest company in the S&P Small-Cap 600 Index. The S&P Small-Cap 600 Index
     is  an  unmanaged  stock  index  that  tracks  the  performance  of  equity
     securities of smaller companies.  As of March 31, 1998, the largest company
     in the index had a market  capitalization  of  approximately  $3.7 billion,
     while  the  median  company  in the index  had a market  capitalization  of
     approximately $554 million.

        The fund may invest in securities other than stocks, such as convertible
     securities,  foreign securities,  short-term  instruments and non-leveraged
     stock index futures contracts.  "Non-leveraged" means that the fund may not
     invest in futures  contracts  where it would be  possible to lose more than
     the fund invested.

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

    *The value of the  fund's  shares  depends  on the value of the  stocks  and
     other securities it owns. The value of the individual  securities Small Cap
     Quantitative  owns will go up and down depending on the  performance of the
     companies  that issued them,  general market and economic  conditions,  and
     investor confidence.

    *Market  performance  tends  to be  cyclical,  and  in the  various  cycles,
     certain  investment  styles may fall in and out of favor.  If the market is
     not  favoring the fund's  style,  the fund's gains may not be as big as, or
     its  losses  may  be  bigger  than,  other  equity  funds  using  different
     investment styles.

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

    *Although  the fund  managers  invest the fund's  assets  primarily  in U.S.
     stocks,  Small  Cap  Quantitative  can  invest  in  securities  of  foreign
     companies.  Foreign  securities  can have certain  unique risks,  including
     fluctuations   in  currency   exchange   rates,   political   and  economic
     developments,  reduced availability of public information and the fact that
     foreign  issuers are not required to abide by the same financial  reporting
     or regulatory practices as U.S. issuers.


Small Cap Quantitative                              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 shares of other  American
     Century funds, or to redeem your shares.  The following table describes the
     fees and expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                 0.90%(1)
           Distribution and Service (12b-1) Fees          None
           Other Expenses(2)                              0.01%
           Total Annual Fund Operating Expenses           0.91%

        (1)Based upon no assets in the fund. The fund's management fee decreases
        as fund assets  increase.

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

           EXAMPLE OF HYPOTHETICAL FUND COSTS
               Assuming you...
              *   invest $10,000 in the fund
              *   redeem your shares at the end of the periods shown below 

              *   earn a 5% return each year 
              *   incur the same fund operating expenses shown above
                  ...your cost of investing in the fund would be:

                   1 year         3 years       5 years        10 years
                   -----------------------------------------------------
                    $93            $289          $502          $1,115

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

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

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

        JOHN SCHNIEDWIND,  Senior Vice President and Group  Leader--Quantitative
     Equity, supervises the team that manages the fund.

        KURT  BORGWARDT,  Vice  President,  Portfolio  Manager  and  Director of
     Quantitative  Equity  Research,  joined  American  Century in 1990, and has
     managed the quantitative equity research effort since then.

        WILLIAM MARTIN,  Vice President and Portfolio  Manager,  joined American
     Century in 1989.

6. HOW DO I BUY FUND SHARES?

     *    Complete and return the enclosed application

     *    Call us and exchange shares from another American Century fund

     *    Call us and send your investment by bank wire transfer

        Your initial  investment  must be $2,500 ($1,000 for  traditional  IRAs,
     Roth IRAs and  UGMA/UTMA  accounts),  unless  you  establish  an  automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls below the 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 Small Cap
     Quantitative 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?

        Small Cap Quantitative  pays  distributions of substantially  all of its
     income quarterly.  Distributions from realized capital gains are paid twice
     a year,  usually  in March and  December.  Distributions  may be taxable as
     ordinary income,  capital gains, or a combination of the two. Capital gains
     are taxed at different  rates depending on the length of time the fund held
     the securities that were sold.  Distributions are reinvested  automatically
     in additional shares unless you choose another option.


Fund Profile                                              Small Cap Quantitative


9. WHAT SERVICES ARE AVAILABLE?

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

     *    telephone transactions

     *    wire and electronic funds transfers

     *    24-hour Automated Information Line transactions

     *    24-hour online Internet account access and transactions

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

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

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

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

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            American
        Century(reg.tm)


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

WWW.AMERICANCENTURY.COM

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

AUTOMATED INFORMATION LINE
1-800-345-8765


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

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

FAX
816-340-7962

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

SH-BRO-12625   9808


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