AMERICAN CENTURY TARGET MATURITIES TRUST
485BPOS, 1998-01-30
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                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                    FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933                X
                                                                     -----

         File No. 2-94608:

         Pre-Effective Amendment No.____

         Post-Effective Amendment No._28_                              X
                                                                     -----
                                     and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940        X
                                                                     -----

         File No. 811-4165:

         Amendment No._30_


         AMERICAN CENTURY TARGET MATURITIES TRUST
         (Exact Name of Registrant as Specified in Charter)

         4500 Main Street, Kansas City, MO  64141-6200
         (Address of Principal Executive Offices)

         Registrant's Telephone Number, including Area Code:  650-965-8300

         Douglas A. Paul
         Secretary, Vice President and General Counsel
         1665 Charleston Road, Mountain View, CA  94043
         (Name and Address of Agent for Service)

Approximate Date of Proposed Public Offering:  Immediately, upon effectiveness
(first offered 3/25/85)

It is proposed that this filing become effective:

   _____  immediately upon filing pursuant to paragraph (b) of Rule 485
   __X__  on February 1, 1998, pursuant to paragraph (b) of Rule 485
   _____  60 days after filing pursuant to paragraph (a) of Rule 485
   _____  on (date) pursuant to paragraph (a)(1) of Rule 485 
   _____  75 days after filing pursuant to paragraph (a) (2) of Rule 485
   _____  on (date) pursuant to paragraph (a)(2) of Rule 485

- --------------------------------------------------------------------------------
Registrant has elected to register an indefinite  number of shares of beneficial
interest  under the  Securities  Act of 1933  pursuant  to Rule 24f-2  under the
Investment  Company Act of 1940. On November 14, 1997,  the  Registrant  filed a
Rule 24f-2 Notice on Form 24f-2 with respect to its fiscal year ended  September
30, 1997.
<PAGE>
                    AMERICAN CENTURY TARGET MATURITIES TRUST
                    1933 Act Post-Effective Amendment No. 28
                            1940 Act Amendment No. 30

                                    FORM N-1A
                              CROSS-REFERENCE SHEET

PART A:  PROSPECTUS

ITEM      PROSPECTUS CAPTION

1         Cover Page

2         Transaction and Operating Expense Table

3         Financial Highlights, Performance Advertising

4         Further Information About American Century, Investment Policies
          of the Funds, Investment Objectives of the Funds, 
          Other Investment Practices, Their Characteristics and Risks

5         Investment Management, Transfer and Administrative Services,
          Financial Highlights

5A        Not Applicable

6         Further Information About American Century, How to Redeem Shares, 
          Cover Page, Distributions, Taxes

7         How to Open an Account, Distribution of Fund Shares, Cover Page, Share
          Price, Transfer and Administrative Services, How to Exchange From One
          Account to Another

8         How to Redeem Shares, Transfer and Administrative Services

9         Not Applicable



PART B:  STATEMENT OF ADDITIONAL INFORMATION

ITEM      STATEMENT OF ADDITIONAL INFORMATION CAPTION

10        Cover Page

11        Table of Contents

12        About the Trust

13        Investment Policies and Techniques, Investment Restrictions, Portfolio
          Transactions

14        Trustee and Officers

15        Additional Purchase and Redemption Information, Trustees and Officers

16        Management, Transfer and Administrative and Services, About the Trust

17        Portfolio Transactions

18        About the Trust

19        Additional Purchase and Redemption Information, Valuation of Portfolio
          Securities

20        Taxation of Debt Instruments

21        Distribution of Fund Shares, Additional Purchase and 
          Redemption Information

22        Performance

23        Cover Page
<PAGE>
                                   PROSPECTUS

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

   
                                FEBRUARY 1, 1998
    

                                     BENHAM
                                  GROUP(reg.tm)

                                   Target 2000
                                   Target 2005
                                   Target 2010
                                   Target 2015
                                   Target 2020
                                   Target 2025

INVESTOR CLASS


                         AMERICAN CENTURY INVESTMENTS
                                FAMILY OF FUNDS

    American  Century  Investments  offers you nearly 70 fund  choices  covering
stocks, bonds, money markets,  specialty investments and blended portfolios.  To
help you find the funds that may meet your investment  needs,  American  Century
funds  have  been  divided  into  three  groups  based on  investment  style and
objectives. These groups, which appear below, are designed to help simplify your
fund decisions.

                          AMERICAN CENTURY INVESTMENTS
- -------------------------------------------------------------------------------
         Benham                American Century          Twentieth Century
         Group                      Group                      Group
- -------------------------------------------------------------------------------
   MONEY MARKET FUNDS         ASSET ALLOCATION &           GROWTH FUNDS
 GOVERNMENT BOND FUNDS          BALANCED FUNDS          INTERNATIONAL FUNDS
 DIVERSIFIED BOND FUNDS   CONSERVATIVE EQUITY FUNDS
  MUNICIPAL BOND FUNDS         SPECIALTY FUNDS
- -------------------------------------------------------------------------------
     Target 2000 
     Target 2005 
     Target 2010 
     Target 2015 
     Target 2020 
     Target 2025


   
                                  PROSPECTUS
                               FEBRUARY 1, 1998
    

                    Target 2000 * Target 2005 * Target 2010
                    Target 2015 * Target 2020 * Target 2025

                                INVESTOR CLASS

                   AMERICAN CENTURY TARGET MATURITIES TRUST

    American  Century  Target  Maturities  Trust is a part of  American  Century
Investments,  a family of funds that  includes  nearly 70 no-load  mutual  funds
covering a variety of investment opportunities. Six of the funds from our Benham
Group that  invest  primarily  in  zero-coupon  U.S.  Treasury  securities,  are
described in this Prospectus.  Their investment  objectives are listed on page 2
of this Prospectus. The other funds are described in separate prospectuses.

    Through its Investor Class of shares,  American  Century offers  investors a
full  line  of  no-load  funds,  investments  that  have  no  sales  charges  or
commissions.

   
    This Prospectus  gives you information  about the funds that you should know
before investing. Please read this Prospectus carefully and retain it for future
reference.  Additional  information  is included in the  Statement of Additional
Information  dated  February 1, 1998, and filed with the Securities and Exchange
Commission  (SEC).  It is  incorporated  into this  Prospectus by reference.  To
obtain a copy without charge, call or write:
    

                          AMERICAN CENTURY INVESTMENTS
                       4500 Main Street * P.O. Box 419200
                Kansas City, Missouri 64141-6200 * 1-800-345-2021
                        International calls: 816-531-5575
                     Telecommunications Device for the Deaf:
                   1-800-634-4113 * In Missouri: 816-444-3485
                        Internet: www.americancentury.com

    Additional  information,  including  this  Prospectus  and the  Statement of
Additional Information,  may be obtained by accessing the Web site maintained by
the SEC (www.sec.gov).

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.


PROSPECTUS                                                                1


                       INVESTMENT OBJECTIVES OF THE FUNDS

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2000

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2005

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2010

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2015

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2020

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2025

    Each  fund  seeks  to  provide  the  highest  attainable  investment  return
consistent  with  the  creditworthiness  of  U.S.  Treasury  securities  and the
professional management of reinvestment and market risks.

    Each fund invests primarily in zero-coupon U.S. Treasury securities and will
be liquidated shortly after the conclusion of its target maturity year. For more
information   about  this  unique   feature,   please  see   "DISTRIBUTIONS-FUND
LIQUIDATION," on page 22.

    An investment in the funds is neither insured nor guaranteed by the U.S.
government.


                There is no assurance that the funds will achieve
                     their respective investment objectives.

NO  PERSON  IS  AUTHORIZED  BY THE  FUNDS  TO GIVE ANY  INFORMATION  OR MAKE ANY
REPRESENTATION OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS OR IN OTHER PRINTED
OR WRITTEN MATERIAL ISSUED BY OR ON BEHALF OF THE FUNDS, AND YOU SHOULD NOT RELY
ON ANY OTHER INFORMATION OR REPRESENTATION.


2      INVESTMENT OBJECTIVES                  AMERICAN CENTURY INVESTMENTS


                               TABLE OF CONTENTS

Investment Objectives of the Funds .........................................   2
Transaction and Operating Expense Table ....................................   4
Financial Highlights .......................................................   5

INFORMATION REGARDING THE FUNDS

   
Investment Policies of the Funds ...........................................  11
    Investment Policies ....................................................  11
    Zero Coupon Securities .................................................  12
    Other Investments ......................................................  12
Other Investment Practices, Their Characteristics
 and Risks .................................................................  12
    Coupon-Bearing U.S. Treasury Securities ................................  13
    Cash Management ........................................................  13
    Securities Lending .....................................................  13
    Portfolio Turnover .....................................................  13
Performance Advertising ....................................................  13
    

HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

American Century Investments ...............................................  15
Investing in American Century ..............................................  15
How to Open an Account .....................................................  15
            By Mail ........................................................  15
            By Wire ........................................................  15
            By Exchange ....................................................  16
            In Person ......................................................  16
       Subsequent Investments ..............................................  16
            By Mail ........................................................  16
            By Telephone ...................................................  16
            By Online Access ...............................................  16
            By Wire ........................................................  16
            In Person ......................................................  16
       Automatic Investment Plan ...........................................  16
How to Exchange from One Account to Another ................................  16
            By Mail ........................................................  17
            By Telephone ...................................................  17
            By Online Access ...............................................  17
How to Redeem Shares .......................................................  17
            By Mail ........................................................  17
            By Telephone ...................................................  17
            By Check-A-Month ...............................................  17
            Other Automatic Redemptions ....................................  17
       Redemption Proceeds .................................................  17
            By Check .......................................................  17
            By Wire and ACH ................................................  17
       Redemption of Shares
            in Low-Balance Accounts ........................................  18
Signature Guarantee ........................................................  18
Special Shareholder Services ...............................................  18
            Automated Information Line .....................................  18
            Online Account Access ..........................................  18
            Open Order Service .............................................  18
            Tax-Qualified Retirement Plans .................................  19
Important Policies Regarding Your Investments ..............................  19
Reports to Shareholders ....................................................  20
Employer-Sponsored Retirement Plans and
    Institutional Accounts .................................................  20

ADDITIONAL INFORMATION YOU SHOULD KNOW

Share Price ................................................................  21
    When Share Price Is Determined .........................................  21
    How Share Price Is Determined ..........................................  21
    Where to Find Information About Share Price ............................  22
Distributions ..............................................................  22
    Buying a Dividend ......................................................  22
    Reverse Share Splits ...................................................  22
    Fund Liquidation .......................................................  22
Taxes ......................................................................  22
    Tax-Deferred Accounts ..................................................  23
    Taxable Accounts .......................................................  23
Management .................................................................  24
    Investment Management ..................................................  24
    Code of Ethics .........................................................  25
    Transfer and Administrative Services ...................................  25
Distribution of Fund Shares ................................................  25
Further Information About American Century .................................  25


PROSPECTUS                                        TABLE OF CONTENTS      3


                    TRANSACTION AND OPERATING EXPENSE TABLE

                                                        Target 2000, Target 2005
                                                        Target 2010, Target 2015
                                                        Target 2020, Target 2025

SHAREHOLDER TRANSACTION EXPENSES:

Maximum Sales Load Imposed on Purchases .............................    none
Maximum Sales Load Imposed on Reinvested Dividends ..................    none
Deferred Sales Load .................................................    none
Redemption Fee(1) ...................................................    none
Exchange Fee ........................................................    none

ANNUAL FUND  OPERATING EXPENSES:
(as a percentage of net assets)

Management Fees(2) ..................................................   0.59%
12b-1 Fees ..........................................................    none
Other Expenses ......................................................   0.01%
Total Fund Operating Expenses .......................................   0.60%

EXAMPLE:

You would pay the following expenses                           1 year    $  6
on a $1,000 investment, assuming a 5%                         3 years      19
annual return and redemption at the end                       5 years      34
of each time period:                                         10 years      75

(1)  REDEMPTION PROCEEDS SENT BY WIRE ARE SUBJECT TO A $10 PROCESSING FEE.

(2)  A PORTION OF THE MANAGEMENT FEE MAY BE PAID BY AMERICAN CENTURY  INVESTMENT
     MANAGEMENT,  INC. TO UNAFFILIATED  THIRD PARTIES WHO PROVIDE  RECORDKEEPING
     AND  ADMINISTRATIVE  SERVICES  THAT  WOULD  OTHERWISE  BE  PERFORMED  BY AN
     AFFILIATE OF THE MANAGER.  SEE  "MANAGEMENT -- TRANSFER AND  ADMINISTRATIVE
     SERVICES," PAGE 25.

   
  The  purpose of this table is to help you  understand  the  various  costs and
expenses  that you,  as a  shareholder,  will bear  directly  or  indirectly  in
connection with an investment in the class of shares offered by this Prospectus.
The  example  set  forth  above  assumes   reinvestment  of  all  dividends  and
distributions  and  uses  a  5%  annual  rate  of  return  as  required  by  SEC
regulations.
    

  NEITHER  THE 5%  RATE OF  RETURN  NOR  THE  EXPENSES  SHOWN  ABOVE  SHOULD  BE
CONSIDERED  INDICATIONS OF PAST OR FUTURE  RETURNS AND EXPENSES.  ACTUAL RETURNS
AND EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN.

   
  The shares  offered by this  Prospectus  are Investor Class shares and have no
up-front or deferred sales charges,  commissions, or 12b-1 fees. The funds offer
one other class of shares,  primarily  to  institutional  investors,  that has a
different  fee  structure  than the Investor  Class.  The  difference in the fee
structures  among the classes is the result of their separate  arrangements  for
shareholder  and  distribution  services and not the result of any difference in
amounts  charged  by  the  manager  for  core  investment   advisory   services.
Accordingly,  the core  investment  advisory  expenses  do not vary by class.  A
difference in fees will result in different performance for the other class. For
additional information about the various classes, see "FURTHER INFORMATION ABOUT
AMERICAN CENTURY," page 25.
    


4    TRANSACTION AND OPERATING EXPENSE TABLE        AMERICAN CENTURY INVESTMENTS
<TABLE>
<CAPTION>
                             FINANCIAL HIGHLIGHTS
                                  TARGET 2000

  The Financial  Highlights for each of the periods  presented have been audited
by KPMG Peat Marwick LLP, independent auditors,  whose report thereon appears in
the fund's annual report,  which is incorporated by reference into the Statement
of Additional  Information.  The annual report contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is for a share  outstanding  throughout  the years ended
September 30, except as noted.

                                   1997      1996      1995      1994      1993      1992      1991     1990     1989(1)    1988

   
PER-SHARE DATA


Net Asset Value,
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>      <C>       <C>      <C>   
Beginning of Period ............. $79.95    $76.86    $66.93    $72.40    $62.16    $52.67    $43.11   $42.79    $37.16   $33.33
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Income From
Investment Operations

  Net Investment Income(2) ......  5.10      4.75      4.37      3.99      3.94      3.90      3.69     3.40      2.36      2.94

  Net Realized and
  Unrealized Gain (Loss)
  on Investment Transactions ....  1.00     (1.66)     5.56     (9.46)     6.30      5.59      5.87    (3.08)     3.27      0.89
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total From
  Investment Operations .........  6.10      3.09      9.93     (5.47)     10.24     9.49      9.56     0.32      5.63      3.83
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Distributions(3)

  From Net Investment Income .... (5.20)    (3.94)    (3.42)    (3.25)    (2.34)    (2.22)    (2.09)   (2.35)      --     (2.23)

  From Net Realized
  Capital Gains .................   --        --        --      (2.95)    (1.83)    (0.16)      --     (0.10)      --        --

  In Excess of Net
  Realized Gains ................   --        --        --      (1.20)      --        --        --       --        --        --
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total Distributions ........... (5.20)    (3.94)    (3.42)    (7.40)    (4.17)    (2.38)    (2.09)   (2.45)      --     (2.23)
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Reverse Share Split .............  5.20      3.94      3.42      7.40      4.17      2.38      2.09     2.45       --       2.23
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Net Asset Value, End of Period .. $86.05    $79.95    $76.86    $66.93    $72.40    $62.16    $52.67   $43.11    $42.79   $37.16
 .                                 ======    ======    ======    ======    ======    ======    ======   ======    ======   ======
Total Return(4) .................  7.64%     4.01%    14.84%    (7.54)%   16.46%    18.02%    22.18%    0.75%    15.15%   11.49%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses
  to Average Net Assets .........  0.56%     0.53%     0.63%     0.59%     0.60%     0.66%     0.66%    0.70%   0.70%(5)   0.70%

  Ratio of Net Investment
  Income to Average Net Assets ..   6.14%    5.99%     6.13%     5.74%     5.94%     6.90%     7.67%    7.84%   7.81%(5)   8.33%

  Portfolio Turnover Rate .......   10%       29%       53%       89%       77%       93%       67%      79%       49%      163%

  Net Assets, End of Period
  (in thousands) ................$248,377  $267,757  $294,736  $243,895  $291,418  $190,063  $89,655  $53,216   $34,820  $14,073

(1)  IN 1989, THE FISCAL YEAR-END FOR AMERICAN  CENTURY TARGET  MATURITIES TRUST
     WAS CHANGED FROM DECEMBER 31 TO SEPTEMBER 30.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

PROSPECTUS                                     FINANCIAL HIGHLIGHTS       5

<TABLE>
<CAPTION>
                             FINANCIAL HIGHLIGHTS
                                  TARGET 2005

  The Financial  Highlights for each of the periods  presented have been audited
by KPMG Peat Marwick LLP, independent auditors,  whose report thereon appears in
the fund's annual report,  which is incorporated by reference into the Statement
of Additional  Information.  The annual report contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is for a share  outstanding  throughout  the years ended
September 30, except as noted.

                                   1997      1996      1995      1994      1993      1992      1991     1990     1989(1)    1988

PER-SHARE DATA
   

Net Asset Value,
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>      <C>       <C>      <C>   
Beginning of Period ............. $57.83    $56.61    $45.22    $51.84    $41.18    $35.13    $27.74   $28.61    $24.36   $21.28
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Income From
Investment Operations

  Net Investment Income(2) ......  3.74      3.50      3.33      3.11      2.90      2.69      2.47     2.27      1.54      1.90

  Net Realized and
  Unrealized Gain (Loss) on
  Investment Transactions .......  2.97     (2.28)     8.06     (9.73)     7.76      3.36      4.92    (3.14)     2.71      1.18
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total From
  Investment Operations .........  6.71      1.22      11.39    (6.62)     10.66     6.05      7.39    (0.87)     4.25      3.08
                                  ------    ------    ------    ------    ------   ------    ------    ------    ------   ------
Distributions(3)

  From Net Investment Income .... (3.61)    (2.06)    (2.41)    (2.70)    (2.51)    (1.75)    (0.86)   (1.60)      --     (1.53)

  From Net Realized
  Capital Gains ................. (0.44)    (0.58)    (0.67)    (8.47)    (1.01)    (0.37)      --     (0.07)      --        --
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total Distributions ........... (4.05)    (2.64)    (3.08)    (11.17)   (3.52)    (2.12)    (0.86)   (1.67)      --     (1.53)
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Reverse Share Split .............  4.05      2.64      3.08      11.17     3.52      2.12      0.86     1.67       --       1.53
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Net Asset Value, End of Period .. $64.54    $57.83    $56.61    $45.22    $51.84    $41.18    $35.13   $27.74    $28.61   $24.36
                                  ======    ======    ======    ======    ======    ======    ======   ======    ======   ======
Total Return(4) ................. 11.60%     2.15%    25.16%   (12.75)%   25.89%    17.22%    26.64%   (3.04)%   17.45%   14.48%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses
  to Average Net Assets .........  0.57%     0.58%     0.71%     0.64%     0.62%     0.63%     0.70%    0.70%   0.70%(5)   0.70%

  Ratio of Net Investment
  Income to Average Net Assets ..   6.15%    6.05%     6.58%     6.37%     6.44%     7.27%     7.80%    7.93%   7.66%(5)   8.44%

  Portfolio Turnover Rate .......   15%       31%       34%       68%       50%       64%       85%     186%       72%       27%

  Net Assets, End of Period
  (in thousands) ................ $281,677  $238,864  $183,452  $96,207  $149,890   $168,697  $161,388  $46,303  $24,955  $8,948

(1)  IN 1989, THE FISCAL YEAR-END FOR AMERICAN  CENTURY TARGET  MATURITIES TRUST
     WAS CHANGED FROM DECEMBER 31 TO SEPTEMBER 30.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

6      FINANCIAL HIGHLIGHTS                   AMERICAN CENTURY INVESTMENTS

<TABLE>
<CAPTION>
                             FINANCIAL HIGHLIGHTS
                                  TARGET 2010

  The Financial  Highlights for each of the periods  presented have been audited
by KPMG Peat Marwick LLP, independent auditors,  whose report thereon appears in
the fund's annual report,  which is incorporated by reference into the Statement
of Additional  Information.  The annual report contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is for a share  outstanding  throughout  the years ended
September 30, except as noted.

                                   1997      1996      1995      1994      1993      1992      1991     1990     1989(1)    1988

   
PER-SHARE DATA


Net Asset Value,
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>      <C>       <C>      <C>   
Beginning of Period ............. $42.47    $42.14    $31.67    $38.13    $28.53    $25.08    $19.18   $20.59    $17.31   $14.96
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Income From
Investment Operations

  Net Investment Income(2) ......  2.79      2.58      2.41      2.24      2.05      1.88      1.72     1.61      1.08      1.29

  Net Realized and
  Unrealized Gain (Loss) on
  Investment Transactions .......  3.90     (2.25)     8.06     (8.70)     7.55      1.57      4.18    (3.02)     2.20      1.06
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total From
  Investment Operations .........  6.69      0.33      10.47    (6.46)     9.60      3.45      5.90    (1.41)     3.28      2.35
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Distributions(3)

  From Net Investment Income .... (2.82)    (1.57)    (1.48)    (1.46)    (1.58)    (1.14)    (1.05)   (1.50)      --     (0.42)

  From Net Realized
  Capital Gains ................. (1.17)      --      (0.48)    (4.31)    (1.14)      --        --     (0.09)      --        --
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total Distributions ........... (3.99)    (1.57)    (1.96)    (5.77)    (2.72)    (1.14)    (1.05)   (1.59)      --     (0.42)
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Reverse Share Split .............  3.99      1.57      1.96      5.77      2.72      1.14      1.05     1.59       --       0.42
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Net Asset Value, End of Period .. $49.16    $42.47    $42.14    $31.67    $38.13    $28.53    $25.08   $19.18    $20.59   $17.31
 .                                 ======    ======    ======    ======    ======    ======    ======   ======    ======   ======
Total Return(4) ................. 15.75%     0.78%    33.06%   (16.92)%   33.61%    13.76%    30.76%   (6.85)%   18.95%   15.71%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses
  to Average Net Assets .........  0.62%     0.67%     0.71%     0.68%     0.66%     0.70%     0.70%    0.70%   0.70%(5)   0.70%

  Ratio of Net Investment
  Income to Average Net Assets ..   6.15%    5.98%     6.56%     6.35%     6.32%     7.20%     7.73%    7.82%   7.34%(5)   8.11%

  Portfolio Turnover Rate .......   26%       24%       26%       35%      132%       95%      131%     191%       88%      259%

  Net Assets, End of Period
  (in thousands) ................ $124,812  $111,117  $95,057   $46,312   $70,551   $55,565   $47,661  $37,222   $42,439  $9,617


(1)  IN 1989, THE FISCAL YEAR-END FOR AMERICAN  CENTURY TARGET  MATURITIES TRUST
     WAS CHANGED FROM DECEMBER 31 TO SEPTEMBER 30.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

PROSPECTUS                                     FINANCIAL HIGHLIGHTS       7

<TABLE>
<CAPTION>
                             FINANCIAL HIGHLIGHTS
                                  TARGET 2015

  The Financial  Highlights for each of the periods  presented have been audited
by KPMG Peat Marwick LLP, independent auditors,  whose report thereon appears in
the fund's annual report,  which is incorporated by reference into the Statement
of Additional  Information.  The annual report contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is for a share  outstanding  throughout  the years ended
September 30, except as noted.

                                   1997      1996      1995      1994      1993      1992      1991     1990     1989(1)    1988

   
PER-SHARE DATA


Net Asset Value,
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>      <C>       <C>      <C>   
Beginning of Period ............. $31.96    $32.20    $22.79    $29.04    $20.39    $18.44    $13.75   $15.62    $12.63   $11.37
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Income From
Investment Operations

  Net Investment Income(2) ......  2.00      1.85      1.71      1.57      1.46      1.33      1.26     1.18      0.79      0.94

  Net Realized and
  Unrealized Gain (Loss) on
  Investment Transactions .......  4.38     (2.09)     7.70     (7.82)     7.19      0.62      3.43    (3.05)     2.20      0.32
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total From
  Investment Operations .........  6.38     (0.24)     9.41     (6.25)     8.65      1.95      4.69    (1.87)     2.99      1.26
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Distributions(3)

  From Net Investment Income .... (2.05)    (1.28)    (0.87)    (1.19)    (1.45)    (1.23)    (0.97)   (0.50)      --     (0.55)

  From Net Realized
  Capital Gains ................. (0.34)    (1.61)      --      (7.08)     (0.34)     --        --     (0.01)      --        --

  In Excess of Net
  Realized Gains ................   --        --        --      (0.37)      --        --        --       --        --        --
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total Distributions ........... (2.39)    (2.89)    (0.87)    (8.64)    (1.79)    (1.23)    (0.97)   (0.51)      --     (0.55)
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Reverse Share Split .............  2.39      2.89      0.87      8.64      1.79      1.23      0.97     0.51       --      0.55
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Net Asset Value, End of Period .. $38.34    $31.96    $32.20    $22.79    $29.04    $20.39    $18.44   $13.75    $15.62   $12.63
                                  ======    ======    ======    ======    ======    ======    ======   ======    ======   ======
Total Return(4) ................. 19.96%    (0.74)%   41.29%   (21.52)%   42.42%    10.57%    34.11%   (11.97)%  23.67%   11.08%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses
  to Average Net Assets .........  0.61%     0.65%     0.71%     0.68%     0.63%     0.62%     0.61%    0.70%   0.70%(5)   0.70%

  Ratio of Net Investment
  Income to Average Net Assets ..   5.79%     5.63%     6.40%     5.97%     6.28%     7.04%     7.79%    7.74%   7.02%(5)   7.97%

  Portfolio Turnover Rate .......   21%       17%       70%       65%      138%      103%       40%      81%       48%      188%

  Net Assets, End of Period
  (in thousands) ................ $114,900  $115,654  $114,647  $66,073  $89,023  $131,106  $222,118  $295,577  $233,792 $11,790


(1)  IN 1989, THE FISCAL YEAR-END FOR AMERICAN  CENTURY TARGET  MATURITIES TRUST
     WAS CHANGED FROM DECEMBER 31 TO SEPTEMBER 30.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

8      FINANCIAL HIGHLIGHTS                   AMERICAN CENTURY INVESTMENTS

<TABLE>
<CAPTION>
                             FINANCIAL HIGHLIGHTS
                                  TARGET 2020

  The Financial  Highlights for each of the periods  presented have been audited
by KPMG Peat Marwick LLP, independent auditors,  whose report thereon appears in
the fund's annual report,  which is incorporated by reference into the Statement
of Additional  Information.  The annual report contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is for a share  outstanding  throughout  the years ended
September 30, except as noted.

                                                     1997      1996      1995      1994      1993     1992      1991     1990(1)


   
PER-SHARE DATA

Net Asset Value,
<S>                                                 <C>       <C>       <C>       <C>       <C>      <C>        <C>      <C>   
Beginning of Period ............................... $22.00    $22.47    $15.28    $20.72    $13.63   $12.54     $9.63    $12.00
                                                    ------    ------    ------    ------    ------   ------    ------    ------
Income From Investment Operations

  Net Investment Income(2) ........................  1.51      1.41      1.19      1.13      1.00     0.92      0.85      0.60

  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions ...............  3.66     (1.88)     6.00     (6.57)     6.09     0.17      2.06     (2.97)
                                                    ------    ------    ------    ------    ------   ------    ------    ------
  Total From
  Investment Operations ...........................  5.17     (0.47)     7.19     (5.44)     7.09     1.09      2.91     (2.37)
                                                    ------    ------    ------    ------    ------   ------    ------    ------
Distributions(3)

  From Net Investment Income ...................... (1.45)    (0.40)    (0.21)    (0.28)    (0.53)   (0.63)    (0.21)      --

  From Net Realized Capital Gains .................   --      (0.04)      --      (1.31)    (0.72)   (0.08)      --        --

  In Excess of Net Realized Gains .................   --        --        --      (1.18)      --       --        --        --
                                                    ------    ------    ------    ------    ------   ------    ------    ------
  Total Distributions ............................. (1.45)    (0.44)    (0.21)    (2.77)    (1.25)   (0.71)    (0.21)      --
                                                    ------    ------    ------    ------    ------   ------    ------    ------
Reverse Share Split ...............................  1.45      0.44      0.21      2.77      1.25     0.71      0.21       --
                                                    ------    ------    ------    ------    ------   ------    ------    ------
Net Asset Value, End of Period .................... $27.17    $22.00    $22.47    $15.28    $20.72   $13.63    $12.54     $9.63
                                                    ======    ======    ======    ======    ======   ======    ======    ======
Total Return(4) ................................... 23.50%    (2.09)%   47.05%   (26.25)%   52.02%    8.69%    30.22%   (19.75)%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses to
  Average Net Assets ..............................  0.53%     0.61%     0.72%     0.70%     0.70%    0.66%     0.67%   0.70%(5)

  Ratio of Net Investment Income
  to Average Net Assets ...........................  6.29%     6.25%     6.24%     6.28%     6.10%    7.19%     7.50%   7.79%(5)

  Portfolio Turnover Rate .........................   14%       47%       78%      116%      179%     144%      151%      189%

  Net Assets, End of Period
  (in thousands) .................................. $553,551  $926,319  $574,702  $58,535   $56,125  $41,793   $88,332   $53,198


(1)  FROM DECEMBER 29, 1989 INCEPTION THROUGH SEPTEMBER 30, 1990.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

PROSPECTUS                                     FINANCIAL HIGHLIGHTS       9

<TABLE>
<CAPTION>
                             FINANCIAL HIGHLIGHTS
                                  TARGET 2025

  The Financial  Highlights for each of the periods  presented have been audited
by KPMG Peat Marwick LLP, independent auditors,  whose report thereon appears in
the fund's annual report,  which is incorporated by reference into the Statement
of Additional  Information.  The annual report contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is  for  a  share  outstanding   throughout  the  period
indicated.

                                                                1997              1996(1)

   
PER-SHARE DATA

<S>                                                             <C>                <C>   
Net Asset Value, Beginning of Period .........................  $17.91             $19.85
                                                                ------             ------
Income From Investment Operations
  Net Investment Income(2) ...................................   1.21               0.72

  Net Realized and Unrealized Gain (Loss)
  on Investment Transactions .................................   3.15              (2.66)
                                                                ------             ------
  Total From Investment Operations ...........................   4.36              (1.94)
                                                                ------             ------
Distributions
  From Net Investment Income .................................  (0.72)               --
                                                                ------             ------
Reverse Share Split ..........................................   0.72                --
                                                                ------             ------
Net Asset Value, End of Period ...............................  $22.27             $17.91
                                                                ======             ======
Total Return(3) ..............................................  24.34%             (9.77)%

RATIOS/SUPPLEMENTAL DATA

Ratio of Operating Expenses to Average Net Assets ............   0.62%            0.67%(4)

Ratio of Net Investment Income to Average Net Assets .........   6.14%            6.57%(4)

Portfolio Turnover Rate ......................................    58%               61%

Net Assets, End of Period (in thousands) .....................  $73,821            $35,661

(1)  FEBRUARY 15, 1996 (INCEPTION) THROUGH SEPTEMBER 30, 1996.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE YEAR.

(3)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(4)  ANNUALIZED.
</TABLE>
    

10      FINANCIAL HIGHLIGHTS                   AMERICAN CENTURY INVESTMENTS


                        INFORMATION REGARDING THE FUNDS

INVESTMENT POLICIES OF THE FUNDS

   
    The funds have adopted certain investment restrictions that are set forth in
the  Statement of Additional  Information.  Those  restrictions,  as well as the
investment  objectives of the funds identified on page 2 of the Prospectus,  and
any other investment  policies designated as "fundamental" in this Prospectus or
in  the  Statement  of  Additional   Information,   cannot  be  changed  without
shareholder approval.  The funds have implemented additional investment policies
and  practices  to guide their  activities  in the  pursuit of their  respective
investment  objectives.  These  policies  and  practices,  which  are  described
throughout this Prospectus,  are not designated as fundamental  policies and may
be changed without shareholder approval.

INVESTMENT POLICIES
    

    Each fund invests  primarily in  zero-coupon  U.S.  Treasury  securities and
their  equivalents  (a zero).  Unlike  U.S.  Treasury  securities  with  coupons
attached, which pay interest periodically, zeros pay no interest. Instead, these
securities are issued at a substantial  discount from their maturity value,  and
this  discount is amortized  over the life of the  security.  Investment  return
comes  from the  difference  between  the  price at which a zero is  issued  (or
purchased) and the price at which it matures (or is sold).

   
    To approximate  the experience an investor would have if he or she purchased
zeros  directly,  the manager  manages each fund to track as closely as possible
the price  behavior  of a zero with the same term to  maturity.  To correct  for
factors such as shareholder  purchases and redemptions (and related  transaction
costs)  that  differentiate  investing  in a portfolio  of zeros from  investing
directly in a zero, the manager  executes  portfolio  transactions  necessary to
accommodate  shareholder activity each business day. To limit reinvestment risk,
the manager adjusts each fund's weighted  average  maturity (WAM) to fall within
the  fund's  target  maturity  year  so  that,  normally,  at  least  90% of the
securities held mature within one year of the fund's target maturity year.
    

    By  adhering  to these  investment  parameters,  the  manager  expects  that
shareholders  who hold their shares  until a fund's  WAM*,  and who reinvest all
dividends and capital gain distributions,  will realize an investment return and
a maturity value that does not differ  substantially from the anticipated growth
rate (AGR) and  anticipated  value at maturity  (AVM)  calculated on the day the
shares were purchased.

    The  manager  calculates  each fund's AGR and AVM each day the Trust is open
for business.  AGR and AVM daily calculations assume, among other factors,  that
the fund's expense ratio and portfolio  composition remain constant for the life
of the fund.

   
    Transaction  costs,  interest  rate changes,  and the  manager's  efforts to
improve total return by taking advantage of market  opportunities also cause the
funds'  AGRs  and  AVMs  to  vary  from  day to  day.  Despite  these  so-called
"destabilizing"  factors,  however,  each  fund's AGR and AVM tend to  fluctuate
within narrow  ranges.  The table on the following page shows each fund's AVM as
of September 30 for each of the past five years.  (AGRs are  illustrated  in the
Statement of Additional Information.)
    

    The funds' share prices and growth  rates are not  guaranteed  by the Trust,
the manager,  or any of their affiliates.  There is no guarantee that the funds'
AVMs will fluctuate as little in the future as they have in the past.

   
    *A FUND'S WEIGHTED  AVERAGE  MATURITY DATE CAN BE CALCULATED AT ANY POINT IN
TIME BY ADDING ITS WAM TO THE CURRENT DATE. FOR EXAMPLE,  IF TODAY WERE NOVEMBER
17,  1998,  AND THE  FUND'S  WAM WERE SIX YEARS,  THE  FUND'S  WEIGHTED  AVERAGE
MATURITY  DATE WOULD BE NOVEMBER  17, 2004.  PLEASE NOTE THAT A FUND'S  WEIGHTED
AVERAGE  MATURITY  DATE  TYPICALLY  PRECEDES  THE DATE ON WHICH THE FUND WILL BE
LIQUIDATED. FOR DETAILS ON FUND LIQUIDATION, SEE PAGE 22.
    


PROSPECTUS                          INFORMATION REGARDING THE FUNDS       11


   
Anticipated Value At Maturity

                 9/30/93     9/30/94     9/30/95    9/30/96     9/30/97
- --------------------------------------------------------------------------

Target 2000      $100.69     $100.86     $100.99    $101.10     $101.13

Target 2005       100.21      100.58      100.32     100.71      100.85

Target 2010       100.94      101.38      101.02     102.53      103.40

Target 2015       106.84      107.95      109.62     110.11      110.52

Target 2020       100.76      102.11      102.31     103.60      104.84

Target 2025         N/A         N/A         N/A      109.24      110.88
- --------------------------------------------------------------------------
    
ZERO COUPON SECURITIES

    Zero-coupon U.S. Treasury  securities (or zeros) are the unmatured  interest
coupons and underlying  principal  portions of U.S. Treasury bonds.  Originally,
these  securities were created by  broker-dealers  who bought Treasury bonds and
deposited these securities with a custodian bank. The  broker-dealers  then sold
receipts  representing  ownership interests in the coupons or principal portions
of the bonds.  Some examples of zero-coupon  securities  sold through  custodial
receipt  programs  are CATS  (Certificates  of Accrual on Treasury  Securities),
TIGRs  (Treasury   Investment  Growth  Receipts),   and  generic  TRs  (Treasury
Receipts).

    The U.S. Treasury subsequently  introduced a program called Separate Trading
of Registered  Interest and Principal of Securities  (STRIPS),  through which it
exchanges  eligible  securities  for their  component  parts and then allows the
component parts to trade in book-entry form.  (Book-entry trading eliminates the
bank credit risks  associated  with  broker-dealer-sponsored  custodial  receipt
programs.)  STRIPS are direct  obligations  of the U.S.  government and have the
same credit risks as other U.S. Treasury securities.

   
    The Resolution  Funding  Corporation  (REFCORP)  issues bonds whose interest
payments are  guaranteed by the U.S.  Treasury and whose  principal  amounts are
secured by zero-coupon  U.S.  Treasury  securities held in a separate  custodial
account  at the  Federal  Reserve  Bank of New York.  The  principal  amount and
maturity  date of REFCORP bonds are the same as the par amount and maturity date
of the  corresponding  zeros;  upon maturity,  REFCORP bonds are repaid from the
proceeds of the zeros.  REFCORP  zeros are the  unmatured  coupons and principal
portions of Resolution Funding  Corporation  bonds. The U.S.  government and its
agencies may issue securities in zero-coupon form. These securities are referred
to as "original issue zero-coupon securities."
    

OTHER INVESTMENTS

    As  a  fund's  target  maturity  year   approaches,   the  manager  may  buy
coupon-bearing  securities whose duration and price  characteristics are similar
to those of aging  zero-coupon  securities.  Towards the end of a fund's  target
maturity  year and  until  the fund is  liquidated,  the  proceeds  of  maturing
zero-coupon securities are invested in U.S. Treasury bills.

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS
AND RISKS

    The funds are designed for investors  with  long-term  financial  goals that
correspond to one or more of the target  maturities  offered.  Investors who use
zeros or the funds for short-term  speculative  purposes should understand that,
although most of the reinvestment risk associated with coupon-bearing  bonds has
been eliminated, the prices of zeros can fluctuate dramatically between issuance
and maturity.  When interest  rates rise, the price of a zero falls more sharply
than  the   price  of  a   coupon-bearing   security   of  the  same   maturity.
Correspondingly,  when  interest  rates  fall,  the price of a zero  rises  more
sharply than the price of a coupon-bearing security.

    Each fund's share price will  fluctuate  daily in response to fund  activity
and changes in the market value of its investments.  Due to the price volatility
of zeros,  redemptions made prior to a fund's target maturity year may result in
unanticipated  capital  gains or losses for the funds.  These  capital gains and
losses will be  distributed  to  shareholders  regardless  of whether  they have
redeemed shares.  Although  shareholders have the option to redeem shares on any
business day, those seeking to minimize their exposure to share price volatility
should plan to hold their shares until the end of their fund's  target  maturity
year.

    Investing in a portfolio of zeros is different from investing  directly in a
zero.  Although the manager  adheres to investment  policies  designed to assure
close  correspondence  between  the price  behavior of a fund and that of a zero
with the same maturity characteristics,  precise forecasts of maturity value and
yield to maturity are not possible.


12      INFORMATION REGARDING THE FUNDS        AMERICAN CENTURY INVESTMENTS


   
    For additional information, see "Additional Investment Restrictions" in the
Statement of Additional Information.
    

COUPON-BEARING U.S. TREASURY SECURITIES

    U.S.  Treasury bills,  notes,  and bonds are direct  obligations of the U.S.
Treasury.  Historically, they have involved no risk of loss of principal if held
to  maturity.  Between  issuance  and  maturity,  however,  the  prices of these
securities   change  in   response   to  changes  in  market   interest   rates.
Coupon-bearing  securities  generate  current interest  payments,  and part of a
fund's return may come from reinvesting interest earned on these securities.

CASH MANAGEMENT

    Each fund may invest in any money market fund,  including  those  advised by
the  manager,  provided  that the  investment  is  consistent  with  the  fund's
investment policies and restrictions.

    UP TO 5% OF EACH FUND'S TOTAL ASSETS MAY BE INVESTED IN THIS MANNER.

SECURITIES LENDING

    The funds may lend portfolio securities to broker-dealers to earn additional
income. This practice could result in a loss or a delay in recovering the fund's
securities.  Securities loans are subject to guidelines  prescribed by the Board
of Trustees, which are set forth in the Statement of Additional Information.

    A FUND'S LOANS MAY NOT EXCEED 33 1/3% OF ITS TOTAL ASSETS.

PORTFOLIO TURNOVER

   
    The  portfolio  turnover  rates of the  funds  are  shown  in the  FINANCIAL
HIGHLIGHTS tables of this Prospectus.

    Investment  decisions  to  purchase  and sell  securities  are  based on the
anticipated contribution of the security in question to a fund's objectives. The
manager  believes  that the rate of  portfolio  turnover is  irrelevant  when it
determines a change is in order to achieve those  objectives  and,  accordingly,
the annual portfolio turnover rate cannot be accurately predicted.

    The  portfolio  turnover of each fund may be higher than other  mutual funds
with similar investment  objectives.  The funds' annual portfolio turnover rates
are not  expected  to  exceed  150% and may vary  from  year to year.  An annual
portfolio  turnover rate of 100% or more is  considered  high.  Higher  turnover
would generate  correspondingly higher transaction costs that are borne directly
by a fund. Portfolio turnover may also affect the character of capital gains, if
any,  realized and  distributed  by a fund since  short-term  capital  gains are
taxable as ordinary income.
    

PERFORMANCE ADVERTISING

   
    From  time  to  time,  the  funds  may  advertise   performance  data.  Fund
performance  may be shown by presenting  one or more  performance  measurements,
including  cumulative  total  return or  average  annual  total  return,  yield,
effective yield and tax-equivalent yield(for tax-exempt funds). Performance data
may be quoted separately for the Investor Class and for the other class.
    

    Cumulative  total  return data is computed by  considering  all  elements of
return,  including  reinvestment  of dividends and capital gains  distributions,
over a stated  period of time.  Average  annual  total return is  determined  by
computing  the annual  compound  return over a stated  period of time that would
have  produced  the fund's  cumulative  total return over the same period if the
fund's performance had remained constant throughout.

    A quotation of yield reflects a fund's income over a stated period expressed
as a percentage of the fund's share price.  The effective yield is calculated in
a similar  manner but, when  annualized,  the income earned by the investment is
assumed to be reinvested.  The effective  yield will be slightly higher than the
yield because of the compounding effect on the assumed reinvestment.

    Yield is  calculated  by adding  over a 30-day  (or  one-month)  period  all
interest and dividend  income (net of fund  expenses)  calculated  on each day's
market  values,  dividing  this  sum  by  the  average  number  of  fund  shares
outstanding  during the period, and expressing the result as a percentage of the
fund's  share  price on the last day of the 30-day (or one  month)  period.  The
percentage is then annualized.  Capital gains and losses are not included in the
calculation.

    Yields are calculated  according to accounting methods that are standardized
in accordance with SEC rules. Because yield accounting methods differ from


PROSPECTUS                              INFORMATION REGARDING THE FUNDS     13


the methods used for other accounting purposes, a fund's yield may not equal the
income  paid on its  shares  or the  income  reported  in the  fund's  financial
statements.

    A tax-equivalent  yield  demonstrates the taxable yield necessary to produce
after-tax  yield  equivalent  to that of a mutual  fund that  invests  in exempt
obligations.  As a  prospective  investor  in the funds,  you  should  determine
whether your state tax-equivalent yield is likely to be higher with a taxable or
with a tax-exempt  fund.  To determine  this,  you may use the formula  depicted
below.

    The  tax-equivalent  yield is based on each fund's  current  state  tax-free
yield, and your state income tax rate. The formula is:

          Fund's State Tax-Free Yield                    Your State
    ----------------------------------------     =     Tax-Equivalent
           100% - State Tax Rate                           Yield

    The funds may also include in advertisements data comparing performance with
the performance of non-related  investment media,  published  editorial comments
and performance  rankings compiled by independent  organizations (such as Lipper
Analytical  Services) and  publications  that monitor the  performance of mutual
funds.  Performance information may be quoted numerically or may be presented in
a table,  graph or other  illustration.  In addition,  fund  performance  may be
compared to well-known indices of market performance.  Fund performance may also
be  compared,  on a relative  basis,  to other  funds in our fund  family.  This
relative  comparison,  which  may be based  upon  historical  or  expected  fund
performance,  volatility  or  other  fund  characteristics,   may  be  presented
numerically,  graphically or in text.  Fund  performance may also be combined or
blended  with  other  funds in our fund  family,  and that  combined  or blended
performance may be compared to the same indices to which individual funds may be
compared.

    All performance  information advertised by the funds is historical in nature
and is not intended to represent or guarantee future results.  The value of fund
shares when redeemed may be more or less than their original cost.


14      INFORMATION REGARDING THE FUNDS        AMERICAN CENTURY INVESTMENTS


               HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

AMERICAN CENTURY INVESTMENTS

    The funds  offered by this  Prospectus  are a part of the  American  Century
Investments  family  of  mutual  funds.  Our  family  provides  a full  range of
investment  opportunities,  from  the  aggressive  equity  growth  funds  in our
Twentieth  Century Group,  to the fixed income funds in our Benham Group, to the
moderate risk and specialty  funds in our American  Century  Group.  Please call
1-800-345-2021  for a  brochure  or  prospectuses  for the  other  funds  in the
American Century Investments family.

   
    To reduce  expenses and  demonstrate  respect for our  environment,  we have
initiated a project  through which we will  eliminate  duplicate  copies of most
financial  reports and  prospectuses  to most  households  and  deliver  account
statements to most households in a single envelope,  even if they have more than
one account.  If  additional  copies of financial  reports and  prospectuses  or
separate mailing of account statements is desired, please call us.
    

INVESTING IN AMERICAN CENTURY

    The  following  section  explains how to invest in American  Century  funds,
including purchases, redemptions,  exchanges and special services. You will find
more detail about doing  business with us by referring to the Investor  Services
Guide that you will receive when you open an account.

    If  you  own  or  are   considering   purchasing   fund  shares  through  an
employer-sponsored  retirement  plan or through a bank,  broker-dealer  or other
financial  intermediary,  the  following  sections,  as well as the  information
contained  in our Investor  Services  Guide,  may not apply to you.  Please read
"EMPLOYER-SPONSORED RETIREMENT PLANS AND INSTITUTIONAL ACCOUNTS," page 20.

HOW TO OPEN AN ACCOUNT

    To open an account,  you must complete and sign an  application,  furnishing
your  taxpayer  identification  number.  (You must also certify  whether you are
subject to  withholding  for failing to report  income to the IRS.)  Investments
received without a certified taxpayer identification number will be returned.

    The minimum  investment is $2,500 ($1,000 for IRA accounts).  These minimums
will be waived if you  establish  an automatic  investment  plan to your account
that is the  equivalent  of at least $50 per month.  See  "AUTOMATIC  INVESTMENT
PLAN," page 16.

    The  minimum  investment  requirements  may be  different  for some types of
retirement  accounts.  Call one of our  Investor  Services  Representatives  for
information  on  our  retirement  plans,  which  are  available  for  individual
investors or for those investing through their employers.

    PLEASE NOTE:  IF YOU REGISTER  YOUR ACCOUNT AS BELONGING TO MULTIPLE  OWNERS
(E.G., AS JOINT  TENANTS),  YOU MUST PROVIDE US WITH SPECIFIC  AUTHORIZATION  ON
YOUR  APPLICATION  IN ORDER FOR US TO ACCEPT  WRITTEN OR TELEPHONE  INSTRUCTIONS
FROM  A  SINGLE  OWNER.  OTHERWISE,  ALL  OWNERS  WILL  HAVE  TO  AGREE  TO  ANY
TRANSACTIONS  THAT INVOLVE THE ACCOUNT  (WHETHER THE  TRANSACTION  REQUEST IS IN
WRITING OR OVER THE TELEPHONE).

    You may invest in the following ways:

BY MAIL

    Send a completed application and check or money order payable in U.S.
dollars to American Century Investments.

BY WIRE

    You may make your initial  investment by wiring funds.  To do so, call us or
mail  a  completed   application  and  provide  your  bank  with  the  following
information:

*  RECEIVING BANK AND ROUTING NUMBER:
   Commerce Bank, N.A. (101000019)

*  BENEFICIARY (BNF):
   American Century Services Corporation
   4500 Main St., Kansas City, Missouri 64111

*  BENEFICIARY ACCOUNT NUMBER (BNF ACCT):
   2804918

*  REFERENCE FOR BENEFICIARY (RFB):
   American  Century  account number into which you are investing.  If more than
   one, leave blank and see Bank to Bank Information below.


PROSPECTUS          HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS     15


*  ORIGINATOR TO BENEFICIARY (OBI):
   Name and address of owner of account into which you are investing.

*  BANK TO BANK INFORMATION
   (BBI OR FREE FORM TEXT):

    *    Taxpayer identification or Social Security
         number

    *    If more than one account,  account numbers and amount to be invested in
         each account.

    *    Current tax year, previous tax year or rollover  designation if an IRA.
         Specify  whether IRA,  SEP-IRA,  SARSEP-IRA,  SIMPLE Employer or SIMPLE
         Employee.

BY EXCHANGE

    Call 1-800-345-2021 from 7 a.m. to 7 p.m. Central time to get information on
opening an account by exchanging from another American Century account. See this
page for more information on exchanges.

IN PERSON

    If you prefer to work with a representative  in person,  please visit one of
our Investor Centers, located at:

   
    4500 Main Street
    Kansas City, Missouri

    4917 Town Center Drive
    Leawood, Kansas

    1665 Charleston Road
    Mountain View, California

    2000 S. Colorado Blvd.
    Denver, Colorado
    

SUBSEQUENT INVESTMENTS

    Subsequent  investments  may  be  made  by an  automatic  bank,  payroll  or
government direct deposit (see "AUTOMATIC INVESTMENT PLAN," this page) or by any
of  the  methods  below.  The  minimum  investment  requirement  for  subsequent
investments:  $250 for checks submitted without the investment slip portion of a
previous  statement  or  confirmation,  $50 for all  other  types of  subsequent
investments.

BY MAIL

   
    When making subsequent  investments,  enclose your check with the investment
slip portion of the confirmation from a previous  investment.  If the investment
slip is not  available,  indicate your name,  address and account number on your
check or a separate piece of paper. (PLEASE BE AWARE THAT THE INVESTMENT MINIMUM
FOR SUBSEQUENT INVESTMENTS IS HIGHER WITHOUT AN INVESTMENT SLIP.)
    

BY TELEPHONE

    Once your account is open, you may make investments by telephone if you have
authorized us (by choosing "Full Services" on your  application) to draw on your
bank  account.  You may  call an  Investor  Services  Representative  or use our
Automated Information Line.

BY ONLINE ACCESS

    Once  your  account  is open,  you may make  investments  online if you have
authorized us (by choosing "Full Services" on your  application) to draw on your
bank account.

BY WIRE

    You may make  subsequent  investments  by  wire.  Follow  the wire  transfer
instructions on page 15 and indicate your account number.

IN PERSON

   
    You  may  make  subsequent  investments  in  person  at one of our  Investor
Centers. The locations of our Investor Centers are listed on this page.
    

AUTOMATIC INVESTMENT PLAN

   
    You may  elect on your  application  to make  investments  automatically  by
authorizing us to draw on your bank account regularly.  Such investments must be
at least the  equivalent  of $50 per  month.  You also may  choose an  automatic
payroll or government  direct  deposit.  If you are  establishing a new account,
check the appropriate box under  "Automatic  Investments" on your application to
receive  more  information.  If you  would  like to add a direct  deposit  to an
existing account, please call an Investor Services Representative.
    

HOW TO EXCHANGE FROM ONE ACCOUNT TO ANOTHER

   
    As long as you meet any minimum  investment  requirements,  you may exchange
your fund  shares to our other  funds up to six times per year per  account.  An
exchange  request will be processed as of the same day it is received,  if it is
received  before the funds' net asset values are  calculated,  which is one hour
prior to
    


16 HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS  AMERICAN CENTURY INVESTMENTS


the  close  of the New York  Stock  Exchange  for the  funds  described  in this
Prospectus,  and at the close of the Exchange  for all of our other  funds.  See
"WHEN SHARE PRICE IS DETERMINED," page 21.

    For any single exchange,  the shares of each fund being acquired must have a
value of at least $100.  However, we will allow investors to set up an Automatic
Exchange Plan between any two funds in the amount of at least $50 per month. See
our Investor Services Guide for further information about exchanges.

BY MAIL

    You may direct us in writing  to  exchange  your  shares  from one  American
Century account to another. For additional information,  please see our Investor
Services Guide.

BY TELEPHONE

    You can make exchanges over the telephone  (either with an Investor Services
Representative or using our Automated Information Line--see page 18) if you have
authorized  us to  accept  telephone  instructions.  You can  authorize  this by
selecting "Full Services" on your application or by calling us at 1-800-345-2021
to get the appropriate form.

BY ONLINE ACCESS

    You  can  make  exchanges  online  if  you  have  authorized  us  to  accept
instructions  over the  Internet.  You can  authorize  this by  selecting  "Full
Services"  on your  application  or by calling us at  1-800-345-2021  to get the
appropriate form.

HOW TO REDEEM SHARES

    We will  redeem or "buy back" your shares at any time.  Redemptions  will be
made at the next net asset value determined after a complete  redemption request
is received.

    Please note that a request to redeem shares in an IRA or 403(b) plan must be
accompanied  by an  executed  IRS  Form  W4-P  and a reason  for  withdrawal  as
specified by the IRS.

BY MAIL

    Your  written  instructions  to  redeem  shares  may  be  made  either  by a
redemption  form,  which we will  send you upon  request,  or by a letter to us.
Certain  redemptions  may require a signature  guarantee.  Please see "SIGNATURE
GUARANTEE," page 18.

BY TELEPHONE

    If you have authorized us to accept telephone  instructions,  you may redeem
your shares by calling an Investor Services Representative.

BY CHECK-A-MONTH

    If you have at least a  $10,000  balance  in your  account,  you may  redeem
shares by  Check-A-Month.  A  Check-A-Month  plan  automatically  redeems enough
shares each month to provide  you with a check in an amount you choose  (minimum
$50). To set up a Check-A-Month  plan, please call and request our Check-A-Month
brochure.

OTHER AUTOMATIC REDEMPTIONS

    If you have at least a $10,000  balance  in your  account,  you may elect to
make redemptions automatically by authorizing us to send funds to you or to your
account  at  a  bank  or  other  financial  institution.  To  set  up  automatic
redemptions, call an Investor Services Representative.

REDEMPTION PROCEEDS

    Please  note that  shortly  after a  purchase  of shares is made by check or
electronic  draft (also known as an ACH draft) from your bank, we may wait up to
15 days or longer to send  redemption  proceeds (to allow your purchase funds to
clear).  No interest is paid on the redemption  proceeds after the redemption is
processed but before your redemption proceeds are sent.

    Redemption proceeds may be sent to you in one of the following ways:

BY CHECK

    Ordinarily,  all  redemption  checks will be made payable to the  registered
owner of the shares and will be mailed only to the  address of record.  For more
information, please refer to our Investor Services Guide.

BY WIRE AND ACH

    You may authorize us to transmit  redemption  proceeds by wire or ACH. These
services will be effective 15 days after we receive the authorization.

    Your bank will usually receive wired funds within 48 hours of  transmission.
Funds transferred by ACH may be received up to seven days after transmission.


PROSPECTUS             HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS      17


Wired  funds  are  subject  to a $10 fee to cover  bank wire  charges,  which is
deducted from redemption proceeds.  Once the funds are transmitted,  the time of
receipt and the funds' availability are not under our control.

REDEMPTION OF SHARES IN  LOW-BALANCE ACCOUNTS

    Whenever  the  shares  held in an  account  have a value  of less  than  the
required  minimum,  a letter will be sent advising you to either bring the value
of the shares held in the account up to the minimum or to establish an automatic
investment  that is the  equivalent of at least $50 per month.  If action is not
taken within 90 days of the letter's  date,  the shares held in the account will
be redeemed and the proceeds from the  redemption  will be sent by check to your
address of record. We reserve the right to increase the investment minimums.

SIGNATURE GUARANTEE

    To protect  your  accounts  from fraud,  some  transactions  will  require a
signature guarantee.  Which transactions will require a signature guarantee will
depend on which  service  options  you elect  when you open  your  account.  For
example,  if you choose "In  Writing  Only," a signature  guarantee  is required
when:

    *    redeeming more than $25,000; or

    *    establishing or increasing a Check-A-Month or automatic transfer on an
         existing account.

    You can obtain a signature  guarantee from a bank or trust  company,  credit
union,  broker-dealer,  securities  exchange or association,  clearing agency or
savings association, as defined by federal law.

    For a more in-depth explanation of our signature guarantee policy, or if you
live outside the United  States and would like to know how to obtain a signature
guarantee, please consult our Investor Services Guide.

    We reserve the right to require a signature guarantee on any transaction, or
to change this policy at any time.

SPECIAL SHAREHOLDER SERVICES

    We offer  several  service  options to make your  account  easier to manage.
These are listed on the account  application.  Please make note of these options
and  elect  the ones  that are  appropriate  for you.  Be aware  that the  "Full
Services" option offers you the most flexibility. You will find more information
about each of these service options in our Investor Services Guide.

    Our special shareholder services include:

AUTOMATED INFORMATION LINE

    We offer an Automated  Information  Line, 24 hours a day, seven days a week,
at 1-800-345-8765.  By calling the Automated Information Line, you may listen to
fund prices,  yields and total return  figures.  You may also use the  Automated
Information  Line to make  investments  into your accounts (if we have your bank
information  on file) and  obtain  your  share  balance,  value and most  recent
transactions.  If you have authorized us to accept telephone  instructions,  you
also may exchange shares from one fund to another via the Automated  Information
Line.  Redemption  instructions  cannot be given via the  Automated  Information
Line.

ONLINE ACCOUNT ACCESS

    You   may   contact   us  24   hours   a  day,   seven   days   a  week   at
www.americancentury.com to access your fund's daily share price, receive updates
on major market  indices and view  historical  performance  of your fund. If you
select "Full  Services" on your  application,  you can use your personal  access
code and  Social  Security  number  to view your  account  balance  and  account
activity,  make subsequent investments from your bank account or exchange shares
from one fund to another.

OPEN ORDER SERVICE

    Through our open order  service,  you may  designate a price at which to buy
shares of a variable-priced fund by exchange from one of our money market funds,
or a price at which to sell shares of a variable-priced  fund by exchange to one
of our money market funds.  The  designated  purchase  price must be equal to or
lower, or the designated sale price equal to or higher, than the variable-priced
fund's net asset value at the time the order is placed.  If the designated price
is  met  within  90  calendar   days,  we  will  execute  your  exchange   order
automatically at that price (or better). Open orders not executed within 90 days
will be canceled.

    If the fund you have selected  deducts a distribution  from its share price,
your order price will be adjusted accordingly so the distribution does not


18 HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS  AMERICAN CENTURY INVESTMENTS


inadvertently  trigger an open order transaction on your behalf. If you close or
re-register  the  account  from which the shares are to be  redeemed,  your open
order will be canceled.

    Because of their time-sensitive nature, open order transactions are accepted
only by  telephone  or in person.  These  transactions  are  subject to exchange
limitations  described  in  each  fund's  prospectus,  except  that  orders  and
cancellations  received  before 2 p.m.  Central time are effective the same day,
and orders or cancellations received after 2 p.m. Central time are effective the
next business day.

TAX-QUALIFIED RETIREMENT PLANS

    Each fund is available for your tax-deferred  retirement plan. Call or write
us and request the appropriate forms for:

    *    Individual Retirement Accounts (IRAs);

    *    403(b) plans for employees of public school
         systems and non-profit organizations; or

    *    Profit sharing plans and pension plans for
         corporations and other employers.

    If your IRA and  403(b)  accounts  do not total  $10,000,  each  account  is
subject to an annual $10 fee, up to a total of $30 per year.

    You can also transfer your  tax-deferred  plan to us from another company or
custodian. Call or write us for a Request to Transfer form.

IMPORTANT POLICIES REGARDING
YOUR INVESTMENTS

    Every  account is subject to policies  that could  affect  your  investment.
Please refer to the Investor  Services Guide for further  information  about the
policies discussed below, as well as further detail about the services we offer

  (1)    We reserve the right for any reason to suspend  the  offering of shares
         for a  period  of  time,  or to  reject  any  specific  purchase  order
         (including  purchases  by  exchange).  Additionally,  purchases  may be
         refused  if, in the  opinion  of the  manager,  they are of a size that
         would disrupt the management of the fund.

  (2)    We  reserve  the  right  to  make  changes  to  any  stated  investment
         requirements,  including those that relate to purchases,  transfers and
         redemptions.  In addition,  we may also alter,  add to or terminate any
         investor   services  and   privileges.   Any  changes  may  affect  all
         shareholders or only certain series or classes of shareholders.

  (3)    Shares  being  acquired  must be  qualified  for sale in your  state of
         residence.

  (4)    Transactions  requesting  a  specific  price and date,  other than open
         orders, will be refused.  Once you have mailed or otherwise transmitted
         your  transaction  instructions  to us,  they  may not be  modified  or
         canceled.

  (5)    If a transaction request is made by a corporation,  partnership, trust,
         fiduciary,  agent  or  unincorporated   association,  we  will  require
         evidence  satisfactory to us of the authority of the individual  making
         the request.

  (6)    We have established  procedures  designed to assure the authenticity of
         instructions received by telephone. These procedures include requesting
         personal  identification  from callers,  recording telephone calls, and
         providing  written  confirmations  of  telephone  transactions.   These
         procedures are designed to protect  shareholders  from  unauthorized or
         fraudulent  instructions.  If we do not employ reasonable procedures to
         confirm  the  genuineness  of  instructions,  then we may be liable for
         losses due to unauthorized or fraudulent instructions. The company, its
         transfer agent and investment  advisor will not be responsible  for any
         loss due to instructions they reasonably believe are genuine.

  (7)    All   signatures   should  be  exactly  as  the  name  appears  in  the
         registration.  If the owner's name appears in the  registration as Mary
         Elizabeth Jones, she should sign that way and not as Mary E. Jones.

  (8)    Unusual  stock  market  conditions  have  in the  past  resulted  in an
         increase  in  the  number  of  shareholder   telephone  calls.  If  you
         experience  difficulty in reaching us during such periods, you may send
         your transaction instructions by mail, express mail or courier service,
         or you may  visit  one of our  Investor  Centers.  You may also use our
         Automated Information Line if you have requested and received an access
         code and are not attempting to redeem shares.


PROSPECTUS          HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS       19


  (9)    If  you  fail  to  provide  us  with  the  correct  certified  taxpayer
         identification  number, we may reduce any redemption proceeds by $50 to
         cover the  penalty the IRS will impose on us for failure to report your
         correct taxpayer identification number on information reports.

  (10)   We will perform special inquiries on shareholder  accounts.  A research
         fee of $15 per hour may be applied.

REPORTS TO SHAREHOLDERS

    At the  end of  each  calendar  quarter,  we will  send  you a  consolidated
statement that summarizes all of your American Century  holdings,  as well as an
individual  statement  for  each  fund you own that  reflects  all  year-to-date
activity in your account.  You may request a statement of your account  activity
at any time.

    With the  exception of most  automatic  transactions,  each time you invest,
redeem,  transfer or exchange  shares,  we will send you a  confirmation  of the
transaction. See the Investor Services Guide for more detail.

    CAREFULLY  REVIEW  ALL THE  INFORMATION  RELATING  TO  TRANSACTIONS  ON YOUR
STATEMENTS  AND  CONFIRMATIONS  TO ENSURE THAT YOUR  INSTRUCTIONS  WERE ACTED ON
PROPERLY.  PLEASE NOTIFY US IMMEDIATELY IN WRITING IF THERE IS AN ERROR.  IF YOU
FAIL TO PROVIDE  NOTIFICATION  OF AN ERROR  WITH  REASONABLE  PROMPTNESS,  I.E.,
WITHIN 30 DAYS OF  NON-AUTOMATIC  TRANSACTIONS  OR WITHIN 30 DAYS OF THE DATE OF
YOUR CONSOLIDATED QUARTERLY STATEMENT, IN THE CASE OF AUTOMATIC TRANSACTIONS, WE
WILL DEEM YOU TO HAVE RATIFIED THE TRANSACTION.

    No later than January 31 of each year, we will send you reports that you may
use in completing your U.S. income tax return.  See the Investor  Services Guide
for more information.

    Each year,  we will send you an annual and a semiannual  report  relating to
your fund, each of which is incorporated herein by reference.  The annual report
includes audited financial  statements and a list of portfolio  securities as of
the  fiscal  year  end.  The  semiannual  report  includes  unaudited  financial
statements  for the first six  months of the fiscal  year,  as well as a list of
portfolio  securities at the end of the period. You also will receive an updated
prospectus at least once each year.  Please read these materials  carefully,  as
they will help you understand your fund.

EMPLOYER-SPONSORED RETIREMENT PLANS AND
INSTITUTIONAL ACCOUNTS

    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,  your  ability to  purchase  shares of the
funds, exchange them for shares of other American Century funds, and redeem them
will depend on the terms of your plan.

    If you  own or are  considering  purchasing  fund  shares  through  a  bank,
broker-dealer,  insurance company or other financial intermediary,  your ability
to purchase,  exchange and redeem shares will depend on your agreement with, and
the policies of, such financial intermediary.

    You may reach one of our Institutional  Service  Representatives  by calling
1-800-345-3533 to request information about our funds and services,  to obtain a
current  prospectus or to get answers to any questions  about our funds that you
are unable to obtain through your plan administrator or financial intermediary.


20 HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS  AMERICAN CENTURY INVESTMENTS


                    ADDITIONAL INFORMATION YOU SHOULD KNOW

SHARE PRICE

WHEN SHARE PRICE IS DETERMINED

    The price of your shares is also  referred to as their net asset value.  Net
asset value is determined  by  calculating  the total value of a fund's  assets,
deducting  total  liabilities  and  dividing  the result by the number of shares
outstanding.  Net asset  value  for the  Funds  offered  by this  Prospectus  is
determined one hour before the close of regular trading on each day that the New
York Stock  Exchange is open,  usually 2 p.m.  Central time. Net asset value for
all other American  Century funds is determined at the close of regular  trading
on the Exchange.

   
    Investments and requests to redeem or exchange shares will receive the share
price next  determined  after  receipt by us of the  investment,  redemption  or
exchange  request.  For example,  investments and requests to redeem or exchange
shares  received by us or one of our agents  before the time as of which the net
asset  value is  determined,  are  effective  on,  and will  receive  the  price
determined  that day.  Investment,  redemption  and exchange  requests  received
thereafter  are effective  on, and receive the price  determined as of, one hour
prior to the close of the Exchange on the next day the Exchange is open.

    Investments  are  considered  received  only when payment is received by us.
Wired funds are  considered  received on the day they are  deposited in our bank
account if they are deposited before the time as of which the net asset value of
the fund is determined.
    

    Investments by telephone pursuant to your prior  authorization to us to draw
on your bank account are considered received at the time of your telephone call.

   
    Investment and transaction  instructions  received by us on any business day
by mail  prior  to the  time as of  which  the net  asset  value  of the fund is
determined, will receive that day's price. Investments and instructions received
after that time will receive the price determined on the next business day.
    

    If you invest in fund shares through an  employer-sponsored  retirement plan
or  other  financial  intermediary,  it  is  the  responsibility  of  your  plan
recordkeeper or financial  intermediary to transmit your purchase,  exchange and
redemption requests to the fund's transfer agent prior to the applicable cut-off
time for receiving  orders and to make payment for any purchase  transactions in
accordance with the fund's  procedures or any contractual  arrangement  with the
fund or the fund's distributor in order for you to receive that day's price.

   
    We have contractual  relationships with certain financial  intermediaries in
which such intermediairies represent that they have systems to track the time at
which  investment  orders are  received  and to  segregate  orders  received  at
different times. Based on these  representations,  each fund has authorized such
intermediaries  and their designees to accept purchase and redemption  orders on
the fund's behalf up to the applicable  cut-off time. The fund will be deemed to
have received such orders upon acceptance by the duly  authorized  intermediary,
and such  orders  will be priced at the fund's net asset  value next  determined
after acceptance on the fund's behalf by such intermediary.
    

HOW SHARE PRICE IS DETERMINED

    The valuation of assets for determining net asset value may be summarized as
follows:

    The portfolio  securities of each fund, except as otherwise noted, listed or
traded on a domestic  securities  exchange  are valued at the last sale price on
that  exchange.  Portfolio  securities  primarily  traded on foreign  securities
exchanges  are  generally  valued  at  the  preceding  closing  values  of  such
securities on the exchange where primarily traded. If no sale is reported, or if
local convention or regulation so provides, the mean of the latest bid and asked
prices is used.  Depending on local convention or regulation,  securities traded
over-the-counter  are priced at the mean of the latest bid and asked prices,  or
at the last sale  price.  When  market  quotations  are not  readily  available,
securities and other assets are valued at fair value as determined in accordance
with procedures adopted by the Board of Trustees.


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       21


    Debt  securities  not traded on a principal  securities  exchange are valued
through  valuations  obtained from a commercial  pricing  service or at the most
recent  mean of the bid and asked  prices  provided  by  investment  dealers  in
accordance with procedures established by the Board of Trustees.

WHERE TO FIND INFORMATION ABOUT SHARE PRICE

    The net asset  values of the  Investor  Class of the Funds are  published in
leading  newspapers daily. The net asset values, as well as yield information on
all of the funds and other funds in the American Century family of funds, may be
obtained by calling us or by accessing our Web site at www.americancentury.com.

DISTRIBUTIONS

    Each  fund  declares  an  ordinary  income  dividend  (and  a  capital  gain
distribution, if necessary) in December.

   
    Distributions  from net realized  securities  gains,  if any,  generally are
declared and paid once a year,  but the funds may make  distributions  on a more
frequent  basis to comply with the  distribution  requirements  of the  Internal
Revenue Code, in all events in a manner  consistent  with the  provisions of the
Investment Company Act of 1940 (the "Investment Company Act").
    

    Participants in employer-sponsored retirement or savings plans must reinvest
all  distributions.   For  shareholders   investing  through  taxable  accounts,
distributions  will be  reinvested  unless  you elect to  receive  them in cash.
Distributions of less than $10 generally will be reinvested.  Distributions made
shortly  after a  purchase  by check  or ACH may be held up to 15 days.  You may
elect to have distributions on shares held in Individual Retirement Accounts and
403(b)  plans  paid in cash  only if you are at  least  59(1)/(2)  years  old or
permanently and totally disabled. Distribution checks normally are mailed within
seven days after the record date. Please consult our Investor Services Guide for
further information regarding your distribution options.

BUYING A DIVIDEND

    The timing of your investment  could have undesirable tax  consequences.  If
you open a new account or buy more shares for your  current  account just before
the day a dividend or distribution is reflected in your fund's share price,  you
will  receive  a  portion  of your  investment  back as a  taxable  dividend  or
distribution.

REVERSE SHARE SPLITS

    At the  same  time  that the  funds'  annual  dividends  (and  capital  gain
distributions,  if any) are  declared,  the Board of  Trustees  also  declares a
reverse share split for each fund that exactly  offsets the per-share  amount of
the fund's dividends (and capital gain distributions).

    Following a reverse  share split,  shareholders  who have chosen to reinvest
dividends and capital gain  distributions  own exactly the same number of shares
they owned prior to the distribution  and reverse share split.  Shareholders who
have  elected to take  distributions  in cash own fewer  shares.  Reverse  share
splits  cause the  funds'  share  prices to behave  similarly  to the  prices of
directly held zero-coupon  securities with comparable maturity  characteristics.
Although  the  Trustees  intend to  declare a reverse  share  split  each time a
dividend or capital gain distribution is declared, they reserve the right not to
do so.

FUND LIQUIDATION

   
    During a fund's target  maturity  year,  shareholders  will be asked if they
wish to receive payment of the liquidation proceeds in cash or to exchange their
shares for those of another American Century fund or another Target fund. If the
Trust has not received instructions by December 31 of the fund's target maturity
year,  shares will be exchanged  for shares of American  Century-Benham  Capital
Preservation Fund (CPF) when the fund is liquidated in the January following the
fund's  target  maturity  year.  If CPF is not  available,  fund  shares will be
exchanged for shares of another money market fund in the American Century family
of funds.
    

TAXES

    Each fund has elected to be taxed under Subchapter M of the Internal Revenue
Code,  which means that to the extent its income is distributed to shareholders,
it pays no income tax.


22     ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


TAX-DEFERRED ACCOUNTS

    If fund  shares  are  purchased  through  tax-deferred  accounts,  such as a
qualified  employer-sponsored  retirement  or savings  plan,  income and capital
gains  distributions  paid by the fund will  generally not be subject to current
taxation,  but will  accumulate in your account under the plan on a tax-deferred
basis.

    Employer-sponsored  retirement and savings plans are governed by complex tax
rules.  If you elect to participate in your employer's  plan,  consult your plan
administrator,  your plan's  summary plan  description,  or a  professional  tax
advisor   regarding  the  tax   consequences  of   participation  in  the  plan,
contributions to, and withdrawals or distributions from the plan.

TAXABLE ACCOUNTS

    Zero-coupon  securities  purchased  by the funds accrue  interest  (commonly
referred to as "imputed  income") for federal  income tax  purposes  even though
zeros do not pay current interest. The funds must distribute this imputed income
to shareholders as ordinary income dividends, which are subject to federal taxes
but exempt from state taxes.

   
    Distributions of net investment income and net short-term  capital gains are
taxable to you as ordinary income, except as described below. The dividends from
net income of the funds do not qualify for the 70% dividends-received  deduction
for corporations since they are derived from interest income. Distributions from
gains on assets  held  greater  than 12 months but not more than 18 months  (28%
rate gain) and/or assets held greater than 18 months (20% rate gain) are taxable
as long-term  gains  regardless  of the length of time you have held the shares.
However,  you should note that any loss  realized upon the sale or redemption of
shares held for six months or less will be treated as a long-term  capital  loss
to the extent of any  distribution  of  long-term  capital gain (28% or 20% rate
gain) to you with respect to such shares.

    Distributions  are taxable to you  regardless  of whether  they are taken in
cash or reinvested,  even if the value of your shares is below your cost. If you
purchase shares shortly before a distribution,  you must pay income taxes on the
distribution,  even though the value of your investment (plus cash received,  if
any) will not have  increased.  In  addition,  the  share  price at the time you
purchase  shares may  include  unrealized  gains in the  securities  held in the
investment portfolio of the fund. If these portfolio securities are subsequently
sold and the gains are realized,  they will, to the extent not offset by capital
losses, be paid to you as a distribution of capital gains and will be taxable to
you as short-term or long-term capital gains.
    

    In January of the year  following the  distribution,  if you own shares in a
taxable account, you will receive a Form 1099-DIV notifying you of the status of
your distributions for federal income tax purposes.

    Distributions may also be subject to state and local taxes, even if all or a
substantial  part  of such  distributions  are  derived  from  interest  on U.S.
government  obligations  which,  if you received them directly,  would be exempt
from state income tax. However, most but not all states allow this tax exemption
to pass  through  to fund  shareholders  when a fund pays  distributions  to its
shareholders.  You should  consult your tax advisor about the tax status of such
distributions in your own state.

   
    If you have not complied  with certain  provisions  of the Internal  Revenue
Code and  regulations,  we are  required by federal law to withhold and remit to
the IRS 31% of reportable  payments (which may include dividends,  capital gains
distributions  and redemptions).  Those regulations  require you to certify that
the Social Security number or tax  identification  number you provide is correct
and that you are not subject to 31% withholding for previous  under-reporting to
the  IRS.  You  will be asked  to make  the  appropriate  certification  on your
application.  Payments  reported by us that omit your Social  Security number or
tax  identification  number will  subject us to a penalty of $50,  which will be
charged  against  your account if you fail to provide the  certification  by the
time the report is filed, and is not refundable.

    Redemption of shares of a fund  (including  redemptions  made in an exchange
transaction)  will be a taxable  transaction for federal income tax purposes and
shareholders  will generally  recognize a gain or loss in an amount equal to the
difference  between  the basis of the shares and the amount  received.  Assuming
that  shareholders hold such shares as a capital asset, the gain or loss will be
a capital gain or loss and will generally be considered long-term subject to tax
at a maximum rate of 28% (28% rate gain/loss) if shareholders
    


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       23


   
have held such  shares  for a period of more than 12 months but not more than 18
months and  long-term  subject to tax at a maximum  rate of 20%,  minimum of 10%
(20% rate gain/loss) if shareholders  have held such shares for a period of more
than 18 months.  If a loss is realized on the  redemption  of fund  shares,  the
reinvestment  in  additional  fund  shares  within  30 days  before or after the
redemption may be subject to the "wash sale" rules of the Internal Revenue Code,
resulting in a postponement  of the  recognition of such loss for federal income
tax purposes.
    

MANAGEMENT

INVESTMENT MANAGEMENT

   
    The Funds are  diversified,  open-end series of the American  Century Target
Maturities Trust. Under the laws of the Commonwealth of Massachusetts, the Board
of Trustees is  responsible  for managing the business and affairs of the Trust.
Acting  pursuant to an  investment  management  agreement  entered into with the
funds,  American Century  Investment  Management,  Inc. serves as the investment
manager of the funds. Its principal place of business is American Century Tower,
4500 Main Street,  Kansas City,  Missouri 64111.  The manager has been providing
investment advisory services to investment  companies and institutional  clients
since it was founded in 1958.

    The manager supervises and manages the investment portfolio of each fund and
directs the purchase and sale of its investment securities. It utilizes teams of
portfolio managers, assistant portfolio managers and analysts acting together to
manage the assets of the funds.  The teams meet  regularly  to review  portfolio
holdings and to discuss purchase and sale activity. The teams adjust holdings in
the  funds'  portfolios  as they  deem  appropriate  in  pursuit  of the  funds'
investment  objectives.  Individual  portfolio  manager members of the teams may
also  adjust  portfolio  holdings  of the  funds or of  sectors  of the funds as
necessary between team meetings.
    

    The portfolio  manager  members of the teams managing the funds described in
this  Prospectus  and  their  work  experience  for the last  five  years are as
follows:

   
    CASEY COLTON,  Senior  Portfolio  Manager,  joined the Manager in 1990, as a
Municipal  Analyst  and has been a member of the team that  manages  the  Target
funds since January, 1996. Mr. Colton is a Chartered Financial Analyst.
    

    DAVID  SCHROEDER,  Vice President,  joined the Manager in 1990, and has been
primarily  responsible for the day-to-day operations of each of the Target funds
since July, 1990.

   
    JEREMY FLETCHER, Associate Portfolio Manager, joined the manager in 1991 and
has been a member of the team that manages the Target funds since August, 1997.
    

    The  activities  of the manager are subject only to directions of the fund's
Board of  Trustees.  The  manager  pays all the  expenses  of the  funds  except
brokerage,  taxes,  portfolio  insurance,  interest,  fees and  expenses  of the
non-interested  person  directors  (including  counsel  fees) and  extraordinary
expenses.

    For the services  provided to the funds,  the manager receives a monthly fee
based on a percentage of the average net assets of the fund.  The annual rate at
which this fee is assessed is determined monthly in a two-step process: First, a
fee rate  schedule is applied to the assets of all of the bond funds  managed by
the manager (the Investment  Category Fee). Second, a separate fee rate schedule
is applied to the assets of all of the mutual funds  managed by the manager (the
Complex Fee). The Investment  Category Fee and the Complex Fee are then added to
determine  the  unified  management  fee  payable  by the  fund to the  manager.
Currently,  the Investment  Category Fee for each of the funds is an annual rate
of 0.29% of the average net assets of each Fund. The Complex Fee is currently an
annual rate of 0.30% of the average net assets of each fund. Further information
about the calculation of the annual management fee is contained in the Statement
of Additional Information.

   
    On the first  business  day of each  month,  each  series  of  shares  pay a
management fee to the manager for the previous month at the specified  rate. The
fee for the previous month is calculated by  multiplying  the applicable fee for
such series by the  aggregate  average  daily  closing  value of the series' net
assets during the previous month,  and further by multiplying  that product by a
fraction, the numerator of which is the number of days in the previous month and
the denominator of which is 365 (366 in leap years).
    


24     ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


CODE OF ETHICS

    The funds and the  manager  have  adopted  a Code of Ethics  that  restricts
personal  investing  practices by  employees of the manager and its  affiliates.
Among other  provisions,  the Code of Ethics requires that employees with access
to information about the purchase or sale of securities in the funds' portfolios
obtain  preclearance before executing personal trades. With respect to Portfolio
Managers  and  other  investment   personnel,   the  Code  of  Ethics  prohibits
acquisition  of securities  in an initial  public  offering,  as well as profits
derived from the purchase and sale of the same security within 60 calendar days.
These  provisions  are  designed  to  ensure  that  the  interests  of the  Fund
shareholders come before the interests of the people who manage those funds.

TRANSFER AND ADMINISTRATIVE SERVICES

   
    American  Century  Services  Corporation,  4500 Main  Street,  Kansas  City,
Missouri, 64111, acts as transfer agent and dividend-paying agent for the funds.
It provides  facilities,  equipment  and  personnel to the funds and is paid for
such services by the manager.

    Pursuant  to  a  Sub-Administration   Agreement  with  the  manager,   Funds
Distributor,  Inc. (FDI) serves as the  Co-Administrator  for the funds.  FDI is
responsible for (i) providing  certain  officers of the funds and (ii) reviewing
and filing  marketing and sales  literature on behalf of the funds. The fees and
expenses of FDI are paid by the manager.

    Although  there is no sales  charge  levied by the  funds,  transactions  in
shares of the funds may be executed by brokers or investment advisors who charge
a transaction-based  fee or other fee for their services.  Such charges may vary
among  broker-dealers and financial advisors,  but in all cases will be retained
by the  broker-dealer or financial  advisor and not remitted to the funds or the
manager.  You  should be aware of the fact that these  transactions  may be made
directly with American Century without incurring such fees.
    

    From time to time,  special  services  may be  offered to  shareholders  who
maintain  higher  share  balances  in our family of funds.  These  services  may
include the waiver of minimum investment requirements, expedited confirmation of
shareholder  transactions,  newsletters and a team of personal  representatives.
Any expenses  associated with these special services will be paid by the manager
or its affiliates.

    The manager and the transfer agent are both wholly-owned by American Century
Companies,  Inc. (ACC). James E. Stowers Jr., Chairman of the Board of Directors
of ACC,  controls  ACC by virtue of his  ownership  of a majority  of its common
stock.

DISTRIBUTION OF FUND SHARES

   
    The funds' shares are  distributed by FDI, a registered  broker-dealer  (the
distributor).  FDI is a wholly-owned indirect subsidiary of Boston Institutional
Group,  Inc. FDI's principal  business  address is 60 State Street,  Suite 1300,
Boston, Massachusetts 02109.
    

    The manager pays all expenses for  promoting and  distributing  the Investor
Class of fund shares  offered by this  Prospectus.  The Investor Class of shares
does not pay any  commissions  or other fees to the  distributor or to any other
broker-dealers  or financial  intermediaries in connection with the distribution
of Fund shares.

   
    Investors  may  open  accounts  with  American   Century  only  through  the
distributor.  All purchase  transactions in the funds offered by this Prospectus
are  processed  by the  transfer  agent,  which  is  authorized  to  accept  any
instructions relating to fund accounts.  All purchase orders must be accepted by
the distributor.
    

FURTHER INFORMATION ABOUT AMERICAN CENTURY

   
    American  Century Target  Maturities  Trust was organized as a Massachusetts
business  trust  on  November  8,  1984.  The  Trust is an  open-end  management
investment  company.  Its business and affairs are managed by its officers under
the  direction of its Board of Trustees.  The  principal  office of the funds is
American  Century  Tower,  4500 Main  Street,  P. O. Box  419200,  Kansas  City,
Missouri  64141-6200.  All inquiries may be made by mail to that address,  or by
telephone to 1-800-345-2021 (international calls: 816-531-5575).
    

    The funds are individual series of the Trust which issues shares with no par
value.  The assets belonging to each series of shares are held separately by the
custodian and in effect each series is a separate  fund.  The funds do not issue
share certificates.


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       25


   
    American  Century Target  Maturities Trust offers two classes of each of the
funds offered by this  Prospectus:  an Investor Class and an Advisor Class.  The
shares offered by this Prospectus are Investor Class shares and have no up-front
charges, commissions or 12b-1 fees.

    The Advisor class is primarily offered to institutional investors or through
institutional  distributions  channels,  such as  employer-sponsored  retirement
plans or through banks,  broker-dealers,  insurance companies or other financial
intermediaries.  This other class has different fees,  expenses,  and/or minimum
investment  requirements  than the Investor  Class.  The  difference  in the fee
structures  among the classes is the result of their separate  arrangements  for
shareholder  and  distribution  services and not the result of any difference in
amounts  charged  by  the  manager  for  core  investment   advisory   services.
Accordingly,  the  core  investment  advisory  expenses  do not  vary by  class.
Different fees and expenses will affect performance.  For additional information
concerning the other class of shares not offered by this Prospectus, call one of
our Investor Services Representatives at 1-800-345-2021.
    

    Except as described  below,  all classes of shares of a fund have  identical
voting,  dividend,   liquidation  and  other  rights,  preferences,   terms  and
conditions.  The only  differences  among the various classes are (a) each class
may be subject to different  expenses specific to that class, (b) each class has
a different identifying designation or name, (c) each class has exclusive voting
rights with respect to matters solely  affecting such class,  and (d) each class
may have different exchange privileges.

    Each  share,  irrespective  of series or class,  is entitled to one vote for
each dollar of net asset value applicable to such share on all questions, except
for those  matters  which must be voted on  separately by the series or class of
shares affected.  Matters affecting only one series or class are voted upon only
by that series or class.

    Shares have  non-cumulative  voting rights,  which means that the holders of
more than 50% of the votes cast in an election of Trustees  can elect all of the
Trustees if they choose to do so, and in such event the holders of the remaining
votes will not be able to elect any person or persons to the Board of Trustees.

   
    Unless required by the Investment  Company Act, it will not be necessary for
the Trust to hold annual meetings of shareholders. As a result, shareholders may
not vote each year on the election of Trustees or the  appointment  of auditors.
However,  pursuant to the Trust's by-laws, the holders of shares representing at
least 10% of the votes  entitled  to be cast may  request  that the Trust hold a
special meeting of shareholders.  We will assist in the communication with other
shareholders.
    

    WE RESERVE THE RIGHT TO CHANGE ANY OF OUR POLICIES, PRACTICES AND PROCEDURES
DESCRIBED IN THIS PROSPECTUS, INCLUDING THE STATEMENT OF ADDITIONAL INFORMATION,
WITHOUT  SHAREHOLDER  APPROVAL  EXCEPT  IN  THOSE  INSTANCES  WHERE  SHAREHOLDER
APPROVAL IS EXPRESSLY REQUIRED.

    THIS  PROSPECTUS  CONSTITUTES AN OFFER TO SELL  SECURITIES OF A FUND ONLY IN
THOSE STATES WHERE THE FUND'S SHARES HAVE BEEN REGISTERED OR OTHERWISE QUALIFIED
FOR SALE. A FUND WILL NOT ACCEPT  APPLICATIONS  FROM PERSONS  RESIDING IN STATES
WHERE THE FUND'S SHARES ARE NOT REGISTERED.


   
26     ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS
    


                                     NOTES


NOTES                                                                       27


                                     NOTES


28                                                                       NOTES


                                     NOTES


NOTES                                                                       29


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

INVESTOR SERVICES:
1-800-345-2021 OR 816-531-5575

AUTOMATED INFORMATION LINE:
1-800-345-8765

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

FAX: 816-340-7962

INTERNET: WWW.AMERICANCENTURY.COM


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

9802           [recycled logo]
SH-BKT-10354      Recycled
<PAGE>
                                   PROSPECTUS

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

   
                                FEBRUARY 1, 1998
    

                                     BENHAM
                                  GROUP(reg.tm)

                                   Target 2000
                                   Target 2005
                                   Target 2010
                                   Target 2015
                                   Target 2020
                                   Target 2025

ADVISOR CLASS


                         AMERICAN CENTURY INVESTMENTS
                                FAMILY OF FUNDS

    American  Century  Investments  offers you nearly 70 fund  choices  covering
stocks, bonds, money markets,  specialty investments and blended portfolios.  To
help you find the funds that may meet your investment  needs,  American  Century
funds  have  been  divided  into  three  groups  based on  investment  style and
objectives. These groups, which appear below, are designed to help simplify your
fund decisions.

                        AMERICAN CENTURY INVESTMENTS
- -------------------------------------------------------------------------------
         Benham                American Century          Twentieth Century
         Group                      Group                      Group
- -------------------------------------------------------------------------------
   MONEY MARKET FUNDS         ASSET ALLOCATION &           GROWTH FUNDS
 GOVERNMENT BOND FUNDS          BALANCED FUNDS          INTERNATIONAL FUNDS
 DIVERSIFIED BOND FUNDS   CONSERVATIVE EQUITY FUNDS
  MUNICIPAL BOND FUNDS         SPECIALTY FUNDS
- -------------------------------------------------------------------------------
     Target 2000 
     Target 2005 
     Target 2010 
     Target 2015 
     Target 2020 
     Target 2025


   
                                  PROSPECTUS
                               FEBRUARY 1, 1998
    

                     Target 2000 * Target 2005 * Target 2010
                     Target 2015 * Target 2020 * Target 2025

                                 ADVISOR CLASS

                   AMERICAN CENTURY TARGET MATURITIES TRUST

    American  Century  Target  Maturities  Trust is a part of  American  Century
Investments,  a family of funds that  includes  nearly 70 no-load  and  low-load
mutual funds  covering a variety of investment  opportunities.  Six of the funds
from our  Benham  Group that  invest  primarily  in  zero-coupon  U.S.  Treasury
securities,  are described in this Prospectus.  Their investment  objectives are
listed on page 2 of this  Prospectus.  The other funds are described in separate
prospectuses.

    Each fund's shares offered in this Prospectus (the Advisor Class shares) are
sold at their net asset value with no sales charges or commissions.  The Advisor
Class  shares  are  subject  to  a  Rule  12b-1  shareholder  services  fee  and
distribution fee as described in this Prospectus.

    The Advisor  Class  shares are  intended  for  purchase by  participants  in
employer-sponsored retirement or savings plans and for persons purchasing shares
through   broker-dealers,   banks,   insurance  companies  and  other  financial
intermediaries that provide various administrative and distribution services.

   
    This Prospectus  gives you information  about the funds that you should know
before investing. Please read this Prospectus carefully and retain it for future
reference.  Additional  information  is included in the  Statement of Additional
Information  dated  February 1, 1998, and filed with the Securities and Exchange
Commission  (SEC).  It is  incorporated  into this  Prospectus by reference.  To
obtain a copy without charge, call or write:
    

                          AMERICAN CENTURY INVESTMENTS
                       4500 Main Street * P.O. Box 419385
                Kansas City, Missouri 64141-6385 * 1-800-345-3533
                        International calls: 816-531-5575
                     Telecommunications Device for the Deaf:
                   1-800-345-1833 * In Missouri: 816-444-3038
                       Internet: www.americancentury.com

    Additional  information,  including  this  Prospectus  and the  Statement of
Additional Information,  may be obtained by accessing the Web site maintained by
the SEC (www.sec.gov).

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.


PROSPECTUS                                                                1


                      INVESTMENT OBJECTIVES OF THE FUNDS

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2000

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2005

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2010

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2015

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2020

AMERICAN CENTURY - BENHAM TARGET MATURITIES
TRUST: 2025

    Each  fund  seeks  to  provide  the  highest  attainable  investment  return
consistent  with  the  creditworthiness  of  U.S.  Treasury  securities  and the
professional management of reinvestment and market risks.

    Each fund invests primarily in zero-coupon U.S. Treasury securities and will
be liquidated shortly after the conclusion of its target maturity year. For more
information   about  this  unique   feature,   please  see   "DISTRIBUTIONS-FUND
LIQUIDATION," on page 17.

    An investment in the funds is neither insured nor guaranteed by the U.S.
government.

                There is no assurance that the funds will achieve
                     their respective investment objectives.

NO  PERSON  IS  AUTHORIZED  BY THE  FUNDS  TO GIVE ANY  INFORMATION  OR MAKE ANY
REPRESENTATION OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS OR IN OTHER PRINTED
OR WRITTEN MATERIAL ISSUED BY OR ON BEHALF OF THE FUNDS, AND YOU SHOULD NOT RELY
ON ANY OTHER INFORMATION OR REPRESENTATION.


2      INVESTMENT OBJECTIVES                  AMERICAN CENTURY INVESTMENTS


                               TABLE OF CONTENTS

Investment Objectives of the Funds .........................................   2
Transaction and Operating Expense Table ....................................   4
Performance Information of Other Class .....................................   5

INFORMATION REGARDING THE FUNDS

   
Investment Policies of the Funds ...........................................  11
    Investment Policies ....................................................  11
    Zero Coupon Securities .................................................  12
    Other Investments ......................................................  12
Other Investment Practices, Their Characteristics
  and Risks ................................................................  12
    Coupon-Bearing U.S. Treasury Securities ................................  13
    Cash Management ........................................................  13
    Securities Lending .....................................................  13
    Portfolio Turnover .....................................................  13
 Performance Advertising ...................................................  13
    

HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

How to Purchase and Sell American
    Century Funds ..........................................................  15
How to Exchange from One American
    Century Fund to Another ................................................  15
How to Redeem Shares .......................................................  15
Telephone Services .........................................................  15
    Investors Line .........................................................  15

ADDITIONAL INFORMATION YOU SHOULD KNOW

Share Price ................................................................  16
    When Share Price Is Determined .........................................  16
    How Share Price Is Determined ..........................................  16
    Where to Find Information About Share Price ............................  17
Distributions ..............................................................  17
    Buying a Dividend ......................................................  17
    Reverse Share Splits ...................................................  17
    Fund Liquidation .......................................................  17
Taxes ......................................................................  17
    Tax-Deferred Accounts ..................................................  17
    Taxable Accounts .......................................................  18
Management .................................................................  19
    Investment Management ..................................................  19
    Code of Ethics .........................................................  20
    Transfer and Administrative Services ...................................  20
Distribution of Fund Shares ................................................  20
    Service and Distribution Fees ..........................................  20
Further Information About American Century .................................  21


PROSPECTUS                                        TABLE OF CONTENTS       3


                    TRANSACTION AND OPERATING EXPENSE TABLE

                                                        Target 2000, Target 2005
                                                        Target 2010, Target 2015
                                                        Target 2020, Target 2025

SHAREHOLDER TRANSACTION EXPENSES:

Maximum Sales Load Imposed on Purchases .............................    none
Maximum Sales Load Imposed on Reinvested Dividends ..................    none
Deferred Sales Load .................................................    none
Redemption Fee ......................................................    none
Exchange Fee ........................................................    none

ANNUAL FUND  OPERATING EXPENSES:
(as a percentage of net assets)

Management Fees(1) ..................................................   0.34%
12b-1 Fees(2) .......................................................   0.50%
Other Expenses ......................................................   0.01%
Total Fund Operating Expenses .......................................   0.85%

EXAMPLE:

You would pay the following expenses                           1 year    $  9
on a $1,000 investment, assuming a 5%                         3 years      27
annual return and redemption at the end                       5 years      47
of each time period:                                         10 years     105

   
(1)  A PORTION OF THE MANAGEMENT FEE MAY BE PAID BY AMERICAN CENTURY  INVESTMENT
     MANAGEMENT,  INC. TO UNAFFILIATED  THIRD PARTIES WHO PROVIDE  RECORDKEEPING
     AND  ADMINISTRATIVE  SERVICES  THAT  WOULD  OTHERWISE  BE  PERFORMED  BY AN
     AFFILIATE OF THE MANAGER.  SEE  "MANAGEMENT -- TRANSFER AND  ADMINISTRATIVE
     SERVICES," PAGE 20.
    

(2)  THE 12B-1 FEE IS DESIGNED TO PERMIT  INVESTORS  TO PURCHASE  ADVISOR  CLASS
     SHARES  THROUGH  BROKER-DEALERS,   BANKS,  INSURANCE  COMPANIES  AND  OTHER
     FINANCIAL  INTERMEDIARIES.  A PORTION OF THE FEE IS USED TO COMPENSATE THEM
     FOR ONGOING RECORDKEEPING AND ADMINISTRATIVE  SERVICES THAT WOULD OTHERWISE
     BE  PERFORMED  BY AN  AFFILIATE  OF THE  MANAGER,  AND A PORTION IS USED TO
     COMPENSATE  THEM FOR  DISTRIBUTION  AND  OTHER  SHAREHOLDER  SERVICES.  SEE
     "SERVICE AND DISTRIBUTION FEES," PAGE 20.


   
  The  purpose of this table is to help you  understand  the  various  costs and
expenses  that you,  as a  shareholder,  will bear  directly  or  indirectly  in
connection with an investment in the class of shares offered by this Prospectus.
The  example  set  forth  above  assumes   reinvestment  of  all  dividends  and
distributions  and  uses  a  5%  annual  rate  of  return  as  required  by  SEC
regulations.
    

  NEITHER  THE 5%  RATE OF  RETURN  NOR  THE  EXPENSES  SHOWN  ABOVE  SHOULD  BE
CONSIDERED  INDICATIONS OF PAST OR FUTURE  RETURNS AND EXPENSES.  ACTUAL RETURNS
AND EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN.

  The shares  offered by this  Prospectus  are Advisor Class  shares.  The funds
offer one other class of shares  which is  primarily  made  available  to retail
investors. The other class has a different fee structure than the Advisor Class.
The  difference in the fee  structures  among the classes is the result of their
separate  arrangements  for  shareholder and  distribution  services and not the
result of any difference in amounts  charged by the manager for core  investment
advisory  services.  Accordingly,  the core investment  advisory expenses do not
vary by class. A difference in fees will result in different performance for the
other class. For additional  information about the various classes, see "FURTHER
INFORMATION ABOUT AMERICAN CENTURY," page 21.


4    TRANSACTION AND OPERATING EXPENSE TABLE   AMERICAN CENTURY INVESTMENTS

<TABLE>
<CAPTION>
                    PERFORMANCE INFORMATION OF OTHER CLASS
                                  TARGET 2000

  The Advisor Class of the Funds was established September 2, 1997; therefore no
shares had been issued prior to the Fund's prior fiscal year end. The  financial
information  in this  table  regarding  selected  per  share  data  for the Fund
reflects the  performance of the Fund's  Investor  Class of shares,  which has a
total expense ratio that is 0.25% lower than the Advisor Class.  Had the Advisor
Class been in existence for the Fund for the time periods presented,  the Fund's
performance information would be lower as a result of the higher expenses.

  The  performance  information  for each of the  periods  presented  have  been
audited by KPMG Peat Marwick LLP,  independent  auditors,  whose report  thereon
appears in the Fund's annual report, which is incorporated by reference into the
Statement of  Additional  Information.  The annual  report  contains  additional
performance  information  and will be made  available  upon  request and without
charge.  The  information  presented is for a share  outstanding  throughout the
years ended September 30, except as noted.

                                   1997      1996      1995      1994      1993      1992      1991     1990     1989(1)    1988

PER-SHARE DATA
   

Net Asset Value,
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>      <C>       <C>      <C>   
Beginning of Period ............  $79.95    $76.86    $66.93    $72.40    $62.16    $52.67    $43.11   $42.79    $37.16   $33.33
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Income From
Investment Operations

  Net Investment Income(2) .....   5.10      4.75      4.37      3.99      3.94      3.90      3.69     3.40      2.36      2.94

  Net Realized and
  Unrealized Gain (Loss) on
  Investment Transactions ......   1.00     (1.66)     5.56     (9.46)     6.30      5.59      5.87    (3.08)     3.27      0.89
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total From
  Investment Operations ........   6.10      3.09      9.93     (5.47)     10.24     9.49      9.56     0.32      5.63      3.83
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Distributions(3)

  From Net
  Investment Income ............  (5.20)    (3.94)    (3.42)    (3.25)    (2.34)    (2.22)    (2.09)   (2.35)      --     (2.23)

  From Net Realized
  Capital Gains ................    --        --        --      (2.95)    (1.83)    (0.16)      --     (0.10)      --        --

  In Excess of Net
  Realized Gains ...............    --        --        --      (1.20)      --        --        --       --        --        --
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total Distributions ..........  (5.20)    (3.94)    (3.42)    (7.40)    (4.17)    (2.38)    (2.09)   (2.45)      --     (2.23)
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Reverse Share Split ............   5.20      3.94      3.42      7.40      4.17      2.38      2.09     2.45       --       2.23
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Net Asset Value,
End of Period ..................  $86.05    $79.95    $76.86    $66.93    $72.40    $62.16    $52.67   $43.11    $42.79   $37.16
                                  ======    ======    ======    ======    ======    ======    ======   ======    ======   ======
Total Return(4) ................  7.64%      4.01%    14.84%    (7.54)%   16.46%    18.02%    22.18%    0.75%    15.15%   11.49%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses
  to Average Net Assets ........   0.56%     0.53%     0.63%     0.59%     0.60%     0.66%     0.66%    0.70%   0.70%(5)   0.70%

  Ratio of Net Investment
  Income to Average Net Assets .    6.14%    5.99%     6.13%     5.74%     5.94%     6.90%     7.67%    7.84%   7.81%(5)   8.33%

  Portfolio Turnover Rate ......    10%       29%       53%       89%       77%       93%       67%      79%       49%      163%

  Net Assets, End of Period
  (in thousands) ............... $248,377  $267,757  $294,736  $243,895  $291,418  $190,063  $89,655  $53,216   $34,820  $14,073

(1)  IN 1989, THE FISCAL YEAR-END FOR AMERICAN  CENTURY TARGET  MATURITIES TRUST
     WAS CHANGED FROM DECEMBER 31 TO SEPTEMBER 30.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

PROSPECTUS                   PERFORMANCE INFORMATION OF OTHER CLASS       5

<TABLE>
<CAPTION>
                    PERFORMANCE INFORMATION OF OTHER CLASS
                                  TARGET 2005

  The Advisor Class of the Funds was established September 2, 1997; therefore no
shares had been issued prior to the Fund's prior fiscal year end. The  financial
information  in this  table  regarding  selected  per  share  data  for the Fund
reflects the  performance of the Fund's  Investor  Class of shares,  which has a
total expense ratio that is 0.25% lower than the Advisor Class.  Had the Advisor
Class been in existence for the Fund for the time periods presented,  the Fund's
performance information would be lower as a result of the higher expenses.

  The  performance  information  for each of the  periods  presented  have  been
audited by KPMG Peat Marwick LLP,  independent  auditors,  whose report  thereon
appears in the Fund's annual report, which is incorporated by reference into the
Statement of  Additional  Information.  The annual  report  contains  additional
performance  information  and will be made  available  upon  request and without
charge.  The  information  presented is for a share  outstanding  throughout the
years ended September 30, except as noted.

                                   1997      1996      1995      1994      1993      1992      1991     1990     1989(1)    1988

PER-SHARE DATA
   

Net Asset Value,
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>      <C>       <C>      <C>   
Beginning of Period ............. $57.83    $56.61    $45.22    $51.84    $41.18    $35.13    $27.74   $28.61    $24.36   $21.28
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Income From
Investment Operations

  Net Investment Income(2) ......  3.74      3.50      3.33      3.11      2.90      2.69      2.47     2.27      1.54      1.90

  Net Realized and
  Unrealized Gain (Loss) on
  Investment Transactions .......  2.97     (2.28)     8.06     (9.73)     7.76      3.36      4.92    (3.14)     2.71      1.18
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total From
  Investment Operations .........  6.71      1.22      11.39    (6.62)     10.66     6.05      7.39    (0.87)     4.25      3.08
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Distributions(3)

  From Net
  Investment Income ............. (3.61)    (2.06)    (2.41)    (2.70)    (2.51)    (1.75)    (0.86)   (1.60)      --     (1.53)

  From Net Realized
  Capital Gains ................. (0.44)    (0.58)    (0.67)    (8.47)    (1.01)    (0.37)      --     (0.07)      --        --
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total Distributions ........... (4.05)    (2.64)    (3.08)    (11.17)   (3.52)    (2.12)    (0.86)   (1.67)      --     (1.53)
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Reverse Share Split .............  4.05      2.64      3.08      11.17     3.52      2.12      0.86     1.67       --       1.53
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Net Asset Value,
End of Period ................... $64.54    $57.83    $56.61    $45.22    $51.84    $41.18    $35.13   $27.74    $28.61   $24.36
                                  ======    ======    ======    ======    ======    ======    ======   ======    ======   ======
Total Return(4) ................. 11.60%     2.15%    25.16%   (12.75)%   25.89%    17.22%    26.64%   (3.04)%   17.45%   14.48%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses
  to Average Net Assets .........  0.57%     0.58%     0.71%     0.64%     0.62%     0.63%     0.70%    0.70%   0.70%(5)   0.70%

  Ratio of Net Investment
  Income to Average Net Assets ..   6.15%    6.05%     6.58%     6.37%     6.44%     7.27%     7.80%    7.93%   7.66%(5)   8.44%

  Portfolio Turnover Rate .......   15%       31%       34%       68%       50%       64%       85%     186%       72%       27%

  Net Assets, End of Period
  (in thousands) ................ $281,677  $238,864  $183,452  $96,207  $149,890   $168,697  $161,388  $46,303  $24,955  $8,948

(1)  IN 1989, THE FISCAL YEAR-END FOR AMERICAN  CENTURY TARGET  MATURITIES TRUST
     WAS CHANGED FROM DECEMBER 31 TO SEPTEMBER 30.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

6     PERFORMANCE INFORMATION OF OTHER CLASS      AMERICAN CENTURY INVESTMENTS


<TABLE>
<CAPTION>
                    PERFORMANCE INFORMATION OF OTHER CLASS
                                  TARGET 2010

  The Advisor Class of the Funds was established September 2, 1997; therefore no
shares had been issued prior to the Fund's prior fiscal year end. The  financial
information  in this  table  regarding  selected  per  share  data  for the Fund
reflects the  performance of the Fund's  Investor  Class of shares,  which has a
total expense ratio that is 0.25% lower than the Advisor Class.  Had the Advisor
Class been in existence for the Fund for the time periods presented,  the Fund's
performance information would be lower as a result of the higher expenses.

  The  performance  information  for each of the  periods  presented  have  been
audited by KPMG Peat Marwick LLP,  independent  auditors,  whose report  thereon
appears in the Fund's annual report, which is incorporated by reference into the
Statement of  Additional  Information.  The annual  report  contains  additional
performance  information  and will be made  available  upon  request and without
charge.  The  information  presented is for a share  outstanding  throughout the
years ended September 30, except as noted.

                                   1997      1996      1995      1994      1993      1992      1991     1990     1989(1)    1988

PER-SHARE DATA
   

Net Asset Value,
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>      <C>       <C>      <C>   
Beginning of Period ............. $42.47    $42.14    $31.67    $38.13    $28.53    $25.08    $19.18   $20.59    $17.31   $14.96
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------

Income From
Investment Operations

  Net Investment Income(2) ......  2.79      2.58      2.41      2.24      2.05      1.88      1.72     1.61      1.08      1.29

  Net Realized and
  Unrealized Gain (Loss) on
  Investment Transactions .......  3.90     (2.25)     8.06     (8.70)     7.55      1.57      4.18    (3.02)     2.20      1.06
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total From
  Investment Operations .........  6.69      0.33      10.47    (6.46)     9.60      3.45      5.90    (1.41)     3.28      2.35
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Distributions(3)

  From Net
  Investment Income ............. (2.82)    (1.57)    (1.48)    (1.46)    (1.58)    (1.14)    (1.05)   (1.50)      --     (0.42)

  From Net Realized
  Capital Gains ................. (1.17)      --      (0.48)    (4.31)    (1.14)      --        --     (0.09)      --        --
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total Distributions ........... (3.99)    (1.57)    (1.96)    (5.77)    (2.72)    (1.14)    (1.05)   (1.59)      --     (0.42)
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Reverse Share Split .............  3.99      1.57      1.96      5.77      2.72      1.14      1.05     1.59       --       0.42
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Net Asset Value,
End of Period ................... $49.16    $42.47    $42.14    $31.67    $38.13    $28.53    $25.08   $19.18    $20.59   $17.31
                                  ======    ======    ======    ======    ======    ======    ======   ======    ======   ======
Total Return(4) ................. 15.75%     0.78%    33.06%   (16.92)%   33.61%    13.76%    30.76%   (6.85)%   18.95%   15.71%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses
  to Average Net Assets .........  0.62%     0.67%     0.71%     0.68%     0.66%     0.70%     0.70%    0.70%   0.70%(5)   0.70%

  Ratio of Net Investment
  Income to Average Net Assets ..   6.15%    5.98%     6.56%     6.35%     6.32%     7.20%     7.73%    7.82%   7.34%(5)   8.11%

  Portfolio Turnover Rate .......   26%       24%       26%       35%      132%       95%      131%     191%       88%      259%

  Net Assets, End of Period
  (in thousands) ................ $124,812  $111,117  $95,057   $46,312   $70,551   $55,565   $47,661  $37,222   $42,439  $9,617

(1)  IN 1989, THE FISCAL YEAR-END FOR AMERICAN  CENTURY TARGET  MATURITIES TRUST
     WAS CHANGED FROM DECEMBER 31 TO SEPTEMBER 30.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

PROSPECTUS                   PERFORMANCE INFORMATION OF OTHER CLASS       7


<TABLE>
<CAPTION>
                    PERFORMANCE INFORMATION OF OTHER CLASS
                                  TARGET 2015

  The Advisor Class of the Funds was established September 2, 1997; therefore no
shares had been issued prior to the Fund's prior fiscal year end. The  financial
information  in this  table  regarding  selected  per  share  data  for the Fund
reflects the  performance of the Fund's  Investor  Class of shares,  which has a
total expense ratio that is 0.25% lower than the Advisor Class.  Had the Advisor
Class been in existence for the Fund for the time periods presented,  the Fund's
performance information would be lower as a result of the higher expenses.

  The  performance  information  for each of the  periods  presented  have  been
audited by KPMG Peat Marwick LLP,  independent  auditors,  whose report  thereon
appears in the Fund's annual report, which is incorporated by reference into the
Statement of  Additional  Information.  The annual  report  contains  additional
performance  information  and will be made  available  upon  request and without
charge.  The  information  presented is for a share  outstanding  throughout the
years ended September 30, except as noted.

                                   1997      1996      1995      1994      1993      1992      1991     1990     1989(1)    1988

PER-SHARE DATA
   

Net Asset Value,
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>      <C>       <C>      <C>   
Beginning of Period ............. $31.96    $32.20    $22.79    $29.04    $20.39    $18.44    $13.75   $15.62    $12.63   $11.37
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Income From
Investment Operations

  Net Investment Income(2) ......  2.00      1.85      1.71      1.57      1.46      1.33      1.26     1.18      0.79      0.94

  Net Realized and
  Unrealized Gain (Loss) on
  Investment Transactions .......  4.38     (2.09)     7.70     (7.82)     7.19      0.62      3.43    (3.05)     2.20      0.32
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total From
  Investment Operations .........  6.38     (0.24)     9.41     (6.25)     8.65      1.95      4.69    (1.87)     2.99      1.26
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Distributions(3)

  From Net
  Investment Income ............. (2.05)    (1.28)    (0.87)    (1.19)    (1.45)    (1.23)    (0.97)   (0.50)      --     (0.55)

  From Net Realized
  Capital Gains ................. (0.34)    (1.61)      --      (7.08)     (0.34)     --        --      (0.01)     --        --

  In Excess of Net
  Realized Gains ................   --        --        --      (0.37)      --        --        --       --        --        --
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
  Total Distributions ........... (2.39)    (2.89)    (0.87)    (8.64)    (1.79)    (1.23)    (0.97)   (0.51)      --     (0.55)
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Reverse Share Split .............  2.39      2.89      0.87      8.64      1.79      1.23      0.97     0.51       --       0.55
                                  ------    ------    ------    ------    ------    ------    ------   ------    ------   ------
Net Asset Value,
End of Period ................... $38.34    $31.96    $32.20    $22.79    $29.04    $20.39    $18.44   $13.75    $15.62   $12.63
                                  ======    ======    ======    ======    ======    ======    ======   ======    ======   ======
Total Return(4) ................. 19.96%    (0.74)%   41.29%   (21.52)%   42.42%    10.57%    34.11%   (11.97)%  23.67%   11.08%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses
  to Average Net Assets .........  0.61%     0.65%     0.71%     0.68%     0.63%     0.62%     0.61%    0.70%   0.70%(5)   0.70%

  Ratio of Net Investment
  Income to Average Net Assets ..   5.79%    5.63%     6.40%     5.97%     6.28%     7.04%     7.79%    7.74%   7.02%(5)   7.97%

  Portfolio Turnover Rate .......   21%       17%       70%       65%      138%      103%       40%      81%       48%      188%

  Net Assets, End of Period
  (in thousands) ................ $114,900  $115,654  $114,647  $66,073  $89,023  $131,106  $222,118  $295,577  $233,792 $11,790

(1)  IN 1989, THE FISCAL YEAR-END FOR AMERICAN  CENTURY TARGET  MATURITIES TRUST
     WAS CHANGED FROM DECEMBER 31 TO SEPTEMBER 30.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE PERIOD.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL RETURN ASSUMES REINVESTMENT OF DIVIDENDS AND CAPITAL GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5) ANNUALIZED.
</TABLE>
    

8     PERFORMANCE INFORMATION OF OTHER CLASS   AMERICAN CENTURY INVESTMENTS

<TABLE>
<CAPTION>
                    PERFORMANCE INFORMATION OF OTHER CLASS
                                  TARGET 2020

  The Advisor Class of the Funds was established September 2, 1997; therefore no
shares had been issued prior to the Fund's prior fiscal year end. The  financial
information  in this  table  regarding  selected  per  share  data  for the Fund
reflects the  performance of the Fund's  Investor  Class of shares,  which has a
total expense ratio that is 0.25% lower than the Advisor Class.  Had the Advisor
Class been in existence for the Fund for the time periods presented,  the Fund's
performance information would be lower as a result of the higher expenses.

  The  performance  information  for each of the  periods  presented  have  been
audited by KPMG Peat Marwick LLP,  independent  auditors,  whose report  thereon
appears in the Fund's annual report, which is incorporated by reference into the
Statement of  Additional  Information.  The annual  report  contains  additional
performance  information  and will be made  available  upon  request and without
charge.  The  information  presented is for a share  outstanding  throughout the
years ended September 30, except as noted.

                                                    1997      1996      1995      1994      1993     1992      1991    1990(1)

PER-SHARE DATA
   

Net Asset Value,
<S>                                                <C>       <C>       <C>       <C>       <C>      <C>        <C>      <C>   
Beginning of Period ............................   $22.00    $22.47    $15.28    $20.72    $13.63   $12.54     $9.63    $12.00
                                                   ------    ------    ------    ------    ------   ------    ------    ------
Income From Investment Operations

  Net Investment Income(2) .....................    1.51      1.41      1.19      1.13      1.00     0.92      0.85      0.60

  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions ............    3.66     (1.88)     6.00     (6.57)     6.09     0.17      2.06     (2.97)
                                                   ------    ------    ------    ------    ------   ------    ------    ------
  Total From
  Investment Operations ........................    5.17     (0.47)     7.19     (5.44)     7.09     1.09      2.91     (2.37)
                                                   ------    ------    ------    ------    ------   ------    ------    ------
Distributions(3)

  From Net Investment Income ...................   (1.45)    (0.40)    (0.21)    (0.28)    (0.53)   (0.63)    (0.21)      --

  From Net Realized Capital Gains ..............     --      (0.04)      --      (1.31)    (0.72)   (0.08)      --        --

  In Excess of Net Realized Gains ..............     --        --        --      (1.18)      --       --        --        --
                                                   ------    ------    ------    ------    ------   ------    ------    ------
  Total Distributions ..........................   (1.45)    (0.44)    (0.21)    (2.77)    (1.25)   (0.71)    (0.21)      --
                                                   ------    ------    ------    ------    ------   ------    ------    ------
Reverse Share Split ............................    1.45      0.44      0.21      2.77      1.25     0.71      0.21       --
                                                   ------    ------    ------    ------    ------   ------    ------    ------
Net Asset Value, End of Period .................   $27.17    $22.00    $22.47    $15.28    $20.72   $13.63    $12.54     $9.63
                                                   ======    ======    ======    ======    ======   ======    ======    ======
Total Return(4) ................................   23.50%    (2.09)%   47.05%   (26.25)%   52.02%    8.69%    30.22%   (19.75)%

RATIOS/SUPPLEMENTAL DATA

  Ratio of Operating Expenses to
  Average Net Assets ...........................    0.53%     0.61%     0.72%     0.70%     0.70%    0.66%     0.67%   0.70%(5)

  Ratio of Net Investment Income
  to Average Net Assets ........................    6.29%     6.25%     6.24%     6.28%     6.10%    7.19%     7.50%   7.79%(5)

  Portfolio Turnover Rate ......................     14%       47%       78%      116%      179%     144%      151%      189%

  Net Assets, End of Period
  (in thousands) ...............................   $553,551  $926,319  $574,702  $58,535   $56,125  $41,793   $88,332   $53,198

(1) FROM DECEMBER 29, 1989, (INCEPTION) THROUGH SEPTEMBER 30, 1990.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE YEAR.

(3)  FOR PERIODS  PRIOR TO SEPTEMBER  30, 1997,  DISTRIBUTIONS  WERE  CALCULATED
     USING AVERAGE SHARES OUTSTANDING DURING THE PERIOD. DISTRIBUTIONS INDICATED
     FOR THOSE PERIODS WILL BE DIFFERENT THAN THE ACTUAL PER-SHARE DISTRIBUTIONS
     TO SHAREHOLDERS.

(4)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(5)  ANNUALIZED.
</TABLE>
    

PROSPECTUS                   PERFORMANCE INFORMATION OF OTHER CLASS       9

<TABLE>
<CAPTION>
                    PERFORMANCE INFORMATION OF OTHER CLASS
                                  TARGET 2025

  The Advisor Class of the Funds was established September 2, 1997; therefore no
shares had been issued prior to the Fund's prior fiscal year end. The  financial
information  in this  table  regarding  selected  per  share  data  for the Fund
reflects the  performance of the Fund's  Investor  Class of shares,  which has a
total expense ratio that is 0.25% lower than the Advisor Class.  Had the Advisor
Class been in existence for the Fund for the time periods presented,  the Fund's
performance information would be lower as a result of the higher expenses.

  The  performance  information  for each of the  periods  presented  have  been
audited by KPMG Peat Marwick LLP,  independent  auditors,  whose report  thereon
appears in the Fund's annual report, which is incorporated by reference into the
Statement of  Additional  Information.  The annual  report  contains  additional
performance  information  and will be made  available  upon  request and without
charge.  The  information  presented is for a share  outstanding  throughout the
years ended September 30, except as noted.

                                                                            1997        1996(1)


PER-SHARE DATA
   

<S>                                                                        <C>          <C>   
Net Asset Value, Beginning of Period ....................................  $17.91       $19.85
                                                                           ------       ------
Income From Investment Operations

  Net Investment Income(2) ..............................................   1.21         0.72

  Net Realized and Unrealized Gain (Loss) on Investment Transactions ....   3.15        (2.66)
                                                                           ------       ------
  Total From Investment Operations ......................................   4.36        (1.94)
                                                                           ------       ------
Distributions

  From Net Investment Income ............................................  (0.72)         --
                                                                           ------       ------
Reverse Share Split .....................................................   0.72          --
                                                                           ------       ------
Net Asset Value, End of Period ..........................................  $22.27       $17.91
                                                                           ======       ======
Total Return(3) .........................................................  24.34%       (9.77)%

RATIOS/SUPPLEMENTAL DATA

Ratio of Operating Expenses to Average Net Assets .......................   0.62%      0.67%(4)

Ratio of Net Investment Income to Average Net Assets ....................   6.14%      6.57%(4)

Portfolio Turnover Rate .................................................    58%         61%

Net Assets, End of Period (in thousands) ................................  $73,821      $35,661


(1) FEBRUARY 15, 1996 (INCEPTION) THROUGH SEPTEMBER 30, 1996.

(2)  COMPUTED USING AVERAGE SHARES OUTSTANDING THROUGHOUT THE YEAR.

(3)  TOTAL  RETURN   ASSUMES   REINVESTMENT   OF  DIVIDENDS  AND  CAPITAL  GAINS
     DISTRIBUTIONS, IF ANY. TOTAL RETURNS FOR PERIODS LESS THAN ONE YEAR ARE NOT
     ANNUALIZED.

(4)  ANNUALIZED.
</TABLE>
    

10     PERFORMANCE INFORMATION OF OTHER CLASS     AMERICAN CENTURY INVESTMENTS


                        INFORMATION REGARDING THE FUNDS

INVESTMENT POLICIES OF THE FUNDS

   
    The funds have adopted certain investment restrictions that are set forth in
the  Statement of Additional  Information.  Those  restrictions,  as well as the
investment  objectives of the funds identified on page 2 of the Prospectus,  and
any other investment  policies designated as "fundamental" in this Prospectus or
in  the  Statement  of  Additional   Information,   cannot  be  changed  without
shareholder approval.  The funds have implemented additional investment policies
and  practices  to guide their  activities  in the  pursuit of their  respective
investment  objectives.  These  policies  and  practices,  which  are  described
throughout this Prospectus,  are not designated as fundamental  policies and may
be changed without shareholder approval.

INVESTMENT POLICIES
    

    Each fund invests  primarily in  zero-coupon  U.S.  Treasury  securities and
their  equivalents  (a zero).  Unlike  U.S.  Treasury  securities  with  coupons
attached, which pay interest periodically, zeros pay no interest. Instead, these
securities are issued at a substantial  discount from their maturity value,  and
this  discount is amortized  over the life of the  security.  Investment  return
comes  from the  difference  between  the  price at which a zero is  issued  (or
purchased) and the price at which it matures (or is sold).

   
    To approximate  the experience an investor would have if he or she purchased
zeros  directly,  the manager  manages each fund to track as closely as possible
the price  behavior  of a zero with the same term to  maturity.  To correct  for
factors such as shareholder  purchases and redemptions (and related  transaction
costs)  that  differentiate  investing  in a portfolio  of zeros from  investing
directly in a zero, the manager  executes  portfolio  transactions  necessary to
accommodate  shareholder activity each business day. To limit reinvestment risk,
the manager adjusts each fund's weighted  average  maturity (WAM) to fall within
the  fund's  target  maturity  year  so  that,  normally,  at  least  90% of the
securities held mature within one year of the fund's target maturity year.
    

    By  adhering  to these  investment  parameters,  the  manager  expects  that
shareholders  who hold their shares  until a fund's  WAM*,  and who reinvest all
dividends and capital gain distributions,  will realize an investment return and
a maturity value that does not differ  substantially from the anticipated growth
rate (AGR) and  anticipated  value at maturity  (AVM)  calculated on the day the
shares were purchased.

    The  manager  calculates  each fund's AGR and AVM each day the Trust is open
for business.  AGR and AVM daily calculations assume, among other factors,  that
the fund's expense ratio and portfolio  composition remain constant for the life
of the fund.

   
    Transaction  costs,  interest  rate changes,  and the  manager's  efforts to
improve total return by taking advantage of market  opportunities also cause the
funds'  AGRs  and  AVMs  to  vary  from  day to  day.  Despite  these  so-called
"destabilizing"  factors,  however,  each  fund's AGR and AVM tend to  fluctuate
within narrow  ranges.  The table on the following page shows each fund's AVM as
of September 30 for each of the past five years.  (AGRs are  illustrated  in the
Statement of Additional Information.)
    

    The funds' share prices and growth  rates are not  guaranteed  by the Trust,
the manager,  or any of their affiliates.  There is no guarantee that the funds'
AVMs will fluctuate as little in the future as they have in the past.

   
    *A FUND'S WEIGHTED  AVERAGE  MATURITY DATE CAN BE CALCULATED AT ANY POINT IN
TIME BY ADDING ITS WAM TO THE CURRENT DATE. FOR EXAMPLE,  IF TODAY WERE NOVEMBER
17,  1998,  AND THE  FUND'S  WAM WERE SIX YEARS,  THE  FUND'S  WEIGHTED  AVERAGE
MATURITY  DATE WOULD BE NOVEMBER  17, 2004.  PLEASE NOTE THAT A FUND'S  WEIGHTED
AVERAGE  MATURITY  DATE  TYPICALLY  PRECEDES  THE DATE ON WHICH THE FUND WILL BE
LIQUIDATED. FOR DETAILS ON FUND LIQUIDATION, SEE PAGE 17.
    


PROSPECTUS                          INFORMATION REGARDING THE FUNDS       11


Anticipated Value At Maturity
   

                   9/30/93      9/30/94     9/30/95      9/30/96    9/30/97
- -------------------------------------------------------------------------------

Target 2000        $100.69      $100.86     $100.99      $101.10    $101.13

Target 2005         100.21       100.58      100.32       100.71     100.85

Target 2010         100.94       101.38      101.02       102.53     103.40

Target 2015         106.84       107.95      109.62       110.11     110.52

Target 2020         100.76       102.11      102.31       103.60     104.84

Target 2025           N/A          N/A         N/A       109.24      110.88
- -------------------------------------------------------------------------------
    
ZERO COUPON SECURITIES

    Zero-coupon U.S. Treasury  securities (or zeros) are the unmatured  interest
coupons and underlying  principal  portions of U.S. Treasury bonds.  Originally,
these  securities were created by  broker-dealers  who bought Treasury bonds and
deposited these securities with a custodian bank. The  broker-dealers  then sold
receipts  representing  ownership interests in the coupons or principal portions
of the bonds.  Some examples of zero-coupon  securities  sold through  custodial
receipt  programs  are CATS  (Certificates  of Accrual on Treasury  Securities),
TIGRs  (Treasury   Investment  Growth  Receipts),   and  generic  TRs  (Treasury
Receipts).

    The U.S. Treasury subsequently  introduced a program called Separate Trading
of Registered  Interest and Principal of Securities  (STRIPS),  through which it
exchanges  eligible  securities  for their  component  parts and then allows the
component parts to trade in book-entry form.  (Book-entry trading eliminates the
bank credit risks  associated  with  broker-dealer-sponsored  custodial  receipt
programs.)  STRIPS are direct  obligations  of the U.S.  government and have the
same credit risks as other U.S. Treasury securities.

   
    The Resolution  Funding  Corporation  (REFCORP)  issues bonds whose interest
payments are  guaranteed by the U.S.  Treasury and whose  principal  amounts are
secured by zero-coupon  U.S.  Treasury  securities held in a separate  custodial
account  at the  Federal  Reserve  Bank of New York.  The  principal  amount and
maturity  date of REFCORP bonds are the same as the par amount and maturity date
of the  corresponding  zeros;  upon maturity,  REFCORP bonds are repaid from the
proceeds of the zeros.  REFCORP  zeros are the  unmatured  coupons and principal
portions  Resolution  Funding  Corporation  bonds.  The U.S.  government and its
agencies may issue securities in zero-coupon form. These securities are referred
to as "original issue zero-coupon securities."
    

OTHER INVESTMENTS

    As  a  fund's  target  maturity  year   approaches,   the  manager  may  buy
coupon-bearing  securities whose duration and price  characteristics are similar
to those of aging  zero-coupon  securities.  Towards the end of a fund's  target
maturity  year and  until  the Fund is  liquidated,  the  proceeds  of  maturing
zero-coupon securities are invested in U.S. Treasury bills.

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS
AND RISKS

    The funds are designed for investors  with  long-term  financial  goals that
correspond to one or more of the target  maturities  offered.  Investors who use
zeros or the funds for short-term  speculative  purposes should understand that,
although most of the reinvestment risk associated with coupon-bearing  bonds has
been eliminated, the prices of zeros can fluctuate dramatically between issuance
and maturity.  When interest  rates rise, the price of a zero falls more sharply
than  the   price  of  a   coupon-bearing   security   of  the  same   maturity.
Correspondingly,  when  interest  rates  fall,  the price of a zero  rises  more
sharply than the price of a coupon-bearing security.

    Each fund's share price will  fluctuate  daily in response to fund  activity
and changes in the market value of its investments.  Due to the price volatility
of zeros,  redemptions made prior to a fund's target maturity year may result in
unanticipated  capital  gains or losses for the funds.  These  capital gains and
losses will be  distributed  to  shareholders  regardless  of whether  they have
redeemed shares.  Although  shareholders have the option to redeem shares on any
business day, those seeking to minimize their exposure to share price volatility
should plan to hold their shares until the end of their fund's  target  maturity
year.

    Investing in a portfolio of zeros is different from investing  directly in a
zero.  Although the manager  adheres to investment  policies  designed to assure
close  correspondence  between  the price  behavior of a fund and that of a zero
with the same maturity characteristics,  precise forecasts of maturity value and
yield to maturity are not possible.


12      INFORMATION REGARDING THE FUNDS        AMERICAN CENTURY INVESTMENTS


   
    For additional information, see "Additional Investment Restrictions" in the
Statement of Additional Information.
    

COUPON-BEARING U.S. TREASURY SECURITIES

    U.S.  Treasury bills,  notes,  and bonds are direct  obligations of the U.S.
Treasury.  Historically, they have involved no risk of loss of principal if held
to  maturity.  Between  issuance  and  maturity,  however,  the  prices of these
securities   change  in   response   to  changes  in  market   interest   rates.
Coupon-bearing  securities  generate  current interest  payments,  and part of a
fund's return may come from reinvesting interest earned on these securities.

CASH MANAGEMENT

    Each fund may invest in any money market fund,  including  those  advised by
the  manager,  provided  that the  investment  is  consistent  with  the  fund's
investment policies and restrictions.

    UP TO 5% OF EACH FUND'S TOTAL ASSETS MAY BE INVESTED IN THIS MANNER.

SECURITIES LENDING

    The funds may lend portfolio securities to broker-dealers to earn additional
income. This practice could result in a loss or a delay in recovering the fund's
securities.  Securities loans are subject to guidelines  prescribed by the Board
of Trustees, which are set forth in the Statement of Additional Information.

    A FUND'S LOANS MAY NOT EXCEED 33 1/3% OF ITS TOTAL ASSETS.

PORTFOLIO TURNOVER

   
    The  portfolio  turnover  rates of the funds  are  shown in the  PERFORMANCE
INFORMATION OF OTHER CLASS tables of this Prospectus.

    Investment  decisions  to  purchase  and sell  securities  are  based on the
anticipated contribution of the security in question to a fund's objectives. The
manager  believes  that the rate of  portfolio  turnover is  irrelevant  when it
determines a change is in order to achieve those  objectives  and,  accordingly,
the annual portfolio turnover rate cannot be accurately predicted.

    The  portfolio  turnover of each fund may be higher than other  mutual funds
with similar investment  objectives.  The funds' annual portfolio turnover rates
are not  expected  to  exceed  150% and may vary  from  year to year.  An annual
portfolio  turnover rate of 100% or more is  considered  high.  Higher  turnover
would generate  correspondingly higher transaction costs that are borne directly
by a fund. Portfolio turnover may also affect the character of capital gains, if
any,  realized and  distributed  by a fund since  short-term  capital  gains are
taxable as ordinary income.
    

PERFORMANCE ADVERTISING

   
    From  time  to  time,  the  funds  may  advertise   performance  data.  Fund
performance  may be shown by presenting  one or more  performance  measurements,
including  cumulative  total  return or  average  annual  total  return,  yield,
effective yield and tax-equivalent yield(for tax-exempt funds). Performance data
may be quoted separately for the Advisor Class and for the other class.
    

    Cumulative  total  return data is computed by  considering  all  elements of
return,  including  reinvestment  of dividends and capital gains  distributions,
over a stated  period of time.  Average  annual  total return is  determined  by
computing  the annual  compound  return over a stated  period of time that would
have  produced  the fund's  cumulative  total return over the same period if the
fund's performance had remained constant throughout.

    A quotation of yield reflects a fund's income over a stated period expressed
as a percentage of the fund's share price.  The effective yield is calculated in
a similar  manner but, when  annualized,  the income earned by the investment is
assumed to be reinvested.  The effective  yield will be slightly higher than the
yield because of the compounding effect on the assumed reinvestment.

    Yield is  calculated  by adding  over a 30-day  (or  one-month)  period  all
interest and dividend  income (net of fund  expenses)  calculated  on each day's
market  values,  dividing  this  sum  by  the  average  number  of  fund  shares
outstanding  during the period, and expressing the result as a percentage of the
fund's  share  price on the last day of the 30-day (or one  month)  period.  The
percentage is then annualized.  Capital gains and losses are not included in the
calculation.

    Yields are calculated according to accounting methods that are standardized
in accordance with SEC


PROSPECTUS                              INFORMATION REGARDING THE FUNDS     13


rules.  Because yield accounting  methods differ from the methods used for other
accounting  purposes, a fund's yield may not equal the income paid on its shares
or the income reported in the fund's financial statements.

    A tax-equivalent  yield  demonstrates the taxable yield necessary to produce
after-tax  yield  equivalent  to that of a mutual  fund that  invests  in exempt
obligations.  As a  prospective  investor  in the funds,  you  should  determine
whether your state tax-equivalent yield is likely to be higher with a taxable or
with a tax-exempt  fund.  To determine  this,  you may use the formula  depicted
below.

    The  tax-equivalent  yield is based on each fund's  current  state  tax-free
yield and your state income tax rate. The formula is:

          Fund's State Tax-Free Yield                      Your State
    ----------------------------------------      =      Tax-Equivalent
             100% - State Tax Rate                           Yield

    The funds may also include in advertisements data comparing performance with
the performance of non-related  investment media,  published  editorial comments
and performance  rankings compiled by independent  organizations (such as Lipper
Analytical  Services) and  publications  that monitor the  performance of mutual
funds.  Performance information may be quoted numerically or may be presented in
a table,  graph or other  illustration.  In addition,  fund  performance  may be
compared to well-known indices of market performance.  Fund performance may also
be  compared,  on a relative  basis,  to other  funds in our fund  family.  This
relative  comparison,  which  may be based  upon  historical  or  expected  fund
performance,  volatility  or  other  fund  characteristics,   may  be  presented
numerically,  graphically or in text.  Fund  performance may also be combined or
blended  with  other  funds in our fund  family,  and that  combined  or blended
performance may be compared to the same indices to which individual funds may be
compared.

    All performance  information advertised by the funds is historical in nature
and is not intended to represent or guarantee future results.  The value of fund
shares when redeemed may be more or less than their original cost.


14      INFORMATION REGARDING THE FUNDS        AMERICAN CENTURY INVESTMENTS


               HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

    The following section explains how to purchase,  exchange and redeem Advisor
Class shares of the Funds offered by this Prospectus.

HOW TO PURCHASE AND SELL AMERICAN
CENTURY FUNDS

    One or more of the Funds  offered  by this  Prospectus  is  available  as an
investment  option under your  employer-sponsored  retirement or savings plan or
through  or in  connection  with a  program,  product  or  service  offered by a
financial intermediary,  such as a bank,  broker-dealer or an insurance company.
Since all records of your share  ownership are  maintained by your plan sponsor,
plan  recordkeeper,  or other  financial  intermediary,  all orders to purchase,
exchange and redeem shares must be made through your employer or other financial
intermediary, as applicable.

    If  you  are   purchasing   through  a  retirement  or  savings  plan,   the
administrator of your plan or your employee benefits office can provide you with
information  on how to  participate  in your  plan  and how to  select  American
Century funds as an investment option.

    If you are purchasing through a financial  intermediary,  you should contact
your service  representative at the financial intermediary for information about
how to select American Century funds.

    If you have questions about a Fund, see "INVESTMENT  POLICIES OF THE FUNDS,"
page  11,  or  call  one  of  our   Institutional   Service   Representative  at
1-800-345-3533.

    Orders to purchase shares are effective on the day we receive payment. See
"WHEN SHARE PRICE IS DETERMINED," page 16.

    We may  discontinue  offering shares  generally in the Funds  (including any
class  of  shares  of a fund)  or in any  particular  state  without  notice  to
shareholders.

   
    To reduce  expenses and  demonstrate  respect for our  environment,  we have
initiated a project  through which we will  eliminate  duplicate  copies of most
financial  reports and  prospectuses  to most  households  and  deliver  account
statements to most households in a single envelope,  even if they have more than
one account.  If  additional  copies of financial  reports and  prospectuses  or
separate mailing of account statements is desired, please call us.
    

HOW TO EXCHANGE FROM ONE AMERICAN
CENTURY FUND TO ANOTHER

    Your plan or program  may  permit you to  exchange  your  investment  in the
shares  of a Fund for  shares  of  another  fund in our  family.  See your  plan
administrator, employee benefits office or financial intermediary for details on
the rules in your plan governing exchanges.

HOW TO REDEEM SHARES

    Subject to any  restrictions  imposed by your  employer's  plan or financial
intermediary's  program, you can sell ("redeem") your shares through the plan or
financial  intermediary  at their net  asset  value.  Your  plan  administrator,
trustee,  or financial  intermediary or other designated  person must provide us
with redemption instructions. The shares will be redeemed at the net asset value
next computed after receipt of the  instructions in good order.  See "WHEN SHARE
PRICE IS  DETERMINED,"  page 16. If you have any questions  about how to redeem,
contact  your  plan   administrator,   employee   benefits  office,  or  service
representative at your financial intermediary, as applicable.

TELEPHONE SERVICES

INVESTORS LINE

    To  request  information  about our funds and a current  Prospectus,  or get
answers to any  questions  that you may have about the funds and the services we
offer, call one of our Institutional Service Representatives at 1-800-345-3533.


PROSPECTUS          HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS       15


                    ADDITIONAL INFORMATION YOU SHOULD KNOW

SHARE PRICE

WHEN SHARE PRICE IS DETERMINED

    The price of your shares is also  referred to as their net asset value.  Net
asset value is determined  by  calculating  the total value of a fund's  assets,
deducting  total  liabilities  and  dividing  the result by the number of shares
outstanding.  Net asset  value  for the  funds  offered  by this  Prospectus  is
determined one hour before the close of regular trading on each day that the New
York Stock  Exchange is open,  usually 2 p.m.  Central time. Net asset value for
all other American  Century funds is determined at the close of regular  trading
on the Exchange.

   
    Investments and requests to redeem or exchange shares will receive the share
price next  determined  after  receipt by us of the  investment,  redemption  or
exchange  request.  For example,  investments and requests to redeem or exchange
shares  received by us or one of our agents  before the time as of which the net
asset  value  is  determined,  are  effective  on and  will  receive  the  price
determined  that day.  Investment,  redemption  and exchange  requests  received
thereafter  are effective  on, and receive the price  determined as of, one hour
prior to the close of the Exchange on the next day the Exchange is open.

    Investments  are  considered  received  only when payment is received by us.
Wired funds are  considered  received on the day they are  deposited in our bank
account if they are deposited before the time as of which the net asset value is
determined.
    

    Investments by telephone pursuant to your prior  authorization to us to draw
on your bank account are considered received at the time of your telephone call.

   
    Investment and transaction  instructions  received by us on any business day
by mail  prior  to the  time as of  which  the net  asset  value  of the fund is
determined, will receive that day's price. Investments and instructions received
after that time will receive the price determined on the next business day.
    

    If you invest in fund shares through an  employer-sponsored  retirement plan
or  other  financial  intermediary,  it  is  the  responsibility  of  your  plan
recordkeeper or financial  intermediary to transmit your purchase,  exchange and
redemption requests to the fund's transfer agent prior to the applicable cut-off
time for receiving  orders and to make payment for any purchase  transactions in
accordance with the fund's  procedures or any contractual  arrangement  with the
fund or the fund's distributor in order for you to receive that day's price.

   
    We have contractual  relationships with certain financial  intermediaries in
which such intermediaries  represent that they have systems to track the time at
which  investment  orders are  received  and to  segregate  orders  received  at
different times. Based on these  representations,  each fund has authorized such
intermediaries  and their designees to accept purchase and redemption  orders on
the fund's behalf up to the applicable  cut-off time. The fund will be deemed to
have received such orders upon acceptance by the duly  authorized  intermediary,
and such  orders  will be priced at the fund's net asset  value next  determined
after acceptance on the fund's behalf by such intermediary.
    

HOW SHARE PRICE IS DETERMINED

    The valuation of assets for determining net asset value may be summarized as
follows:

    The portfolio  securities of each fund, except as otherwise noted, listed or
traded on a domestic  securities  exchange  are valued at the last sale price on
that  exchange.  Portfolio  securities  primarily  traded on foreign  securities
exchanges  are  generally  valued  at  the  preceding  closing  values  of  such
securities on the exchange where primarily traded. If no sale is reported, or if
local convention or regulation so provides, the mean of the latest bid and asked
prices is used.  Depending on local convention or regulation,  securities traded
over-the-counter  are priced at the mean of the latest bid and asked prices,  or
at the last sale  price.  When  market  quotations  are not  readily  available,
securities and other assets are valued at fair value as determined in accordance
with procedures adopted by the Board of Trustees.


16     ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


    Debt  securities  not traded on a principal  securities  exchange are valued
through  valuations  obtained from a commercial  pricing  service or at the most
recent  mean of the bid and asked  prices  provided  by  investment  dealers  in
accordance with procedures established by the Board of Trustees.

WHERE TO FIND INFORMATION ABOUT SHARE PRICE

    The net asset  values of the  Investor  Class of the Funds are  published in
leading newspapers daily.  Because the total expense ratio for the Advisor Class
shares is 0.25% higher than the Investor  Class,  their net asset values will be
lower than the Investor Class.  The net asset values of the Advisor Class may be
obtained by calling us.

DISTRIBUTIONS

    Each  fund  declares  an  ordinary  income  dividend  (and  a  capital  gain
distribution, if necessary) in December.

    Distributions  from net realized  securities  gains,  if any,  generally are
declared and paid once a year,  but the funds may make  distributions  on a more
frequent  basis to comply with the  distribution  requirements  of the  Internal
Revenue Code, in all events in a manner  consistent  with the  provisions of the
Investment Company Act of 1940 (the "Investment Company Act").

    Participants in employer-sponsored retirement or savings plans must reinvest
all  distributions.   For  shareholders   investing  through  taxable  accounts,
distributions  will be  reinvested  unless  you elect to  receive  them in cash.
Distributions of less than $10 generally will be reinvested.  Distributions made
shortly  after a  purchase  by check  or ACH may be held up to 15 days.  You may
elect to have distributions on shares held in Individual Retirement Accounts and
403(b)  plans  paid  in  cash  only  if you are at  least  59 1/2  years  old or
permanently and totally disabled. Distribution checks normally are mailed within
seven days after the record date. Please consult our Investor Services Guide for
further information regarding your distribution options.

BUYING A DIVIDEND

    The timing of your investment  could have undesirable tax  consequences.  If
you open a new account or buy more shares for your  current  account just before
the day a dividend or distribution is reflected in your fund's share price,  you
will  receive  a  portion  of your  investment  back as a  taxable  dividend  or
distribution.

REVERSE SHARE SPLITS

    At the  same  time  that the  funds'  annual  dividends  (and  capital  gain
distributions,  if any) are  declared,  the Board of  Trustees  also  declares a
reverse share split for each fund that exactly  offsets the per-share  amount of
the fund's dividends (and capital gain distributions).

    Following a reverse  share split,  shareholders  who have chosen to reinvest
dividends and capital gain  distributions  own exactly the same number of shares
they owned prior to the distribution  and reverse share split.  Shareholders who
have  elected to take  distributions  in cash own fewer  shares.  Reverse  share
splits  cause the  funds'  share  prices to behave  similarly  to the  prices of
directly held zero-coupon  securities with comparable maturity  characteristics.
Although  the  Trustees  intend to  declare a reverse  share  split  each time a
dividend or capital gain distribution is declared, they reserve the right not to
do so.

FUND LIQUIDATION

   
    During a fund's target  maturity  year,  shareholders  will be asked if they
wish to receive payment of the liquidation proceeds in cash or to exchange their
shares for those of another American Century fund or another Target fund. If the
Trust has not received instructions by December 31 of the fund's target maturity
year,  shares will be exchanged  for shares of American  Century-Benham  Capital
Preservation Fund (CPF) when the fund is liquidated in the January following the
fund's  target  maturity  year.  If CPF is not  available,  fund  shares will be
exchanged for shares of another money market fund in the American Century family
of funds.
    

TAXES

    Each fund has elected to be taxed under Subchapter M of the Internal Revenue
Code,  which means that to the extent its income is distributed to shareholders,
it pays no income tax.

TAX-DEFERRED ACCOUNTS

    If fund  shares  are  purchased  through  tax-deferred  accounts,  such as a
qualified  employer-sponsored  retirement  or savings  plan,  income and capital
gains


PROSPECTUS                    ADDITIONAL INFORMATION YOU SHOULD KNOW       17


distributions  paid  by the  fund  will  generally  not be  subject  to  current
taxation,  but will  accumulate in your account under the plan on a tax-deferred
basis.

    Employer-sponsored  retirement and savings plans are governed by complex tax
rules.  If you elect to participate in your employer's  plan,  consult your plan
administrator,  your plan's  summary plan  description,  or a  professional  tax
advisor   regarding  the  tax   consequences  of   participation  in  the  plan,
contributions to, and withdrawals or distributions from the plan.

TAXABLE ACCOUNTS

    Zero-coupon  securities  purchased  by the funds accrue  interest  (commonly
referred to as "imputed  income") for federal  income tax  purposes  even though
zeros do not pay current interest. The funds must distribute this imputed income
to shareholders as ordinary income dividends, which are subject to federal taxes
but exempt from state taxes.

   
    Distributions of net investment income and net short-term  capital gains are
taxable to you as ordinary income, except as described below. The dividends from
net income of the funds do not qualify for the 70% dividends-received  deduction
for corporations since they are derived from interest income. Distributions from
gains on assets  held  greater  than 12 months but not more than 18 months  (28%
rate gain) and/or assets held greater than 18 months (20% rate gain) are taxable
as long-term  gains  regardless  of the length of time you have held the shares.
However,  you should note that any loss  realized upon the sale or redemption of
shares held for six months or less will be treated as a long-term  capital  loss
to the extent of any  distribution  of  long-term  capital gain (28% or 20% rate
gain) to you with respect to such shares.

    Distributions  are taxable to you  regardless  of whether  they are taken in
cash or reinvested,  even if the value of your shares is below your cost. If you
purchase shares shortly before a distribution,  you must pay income taxes on the
distribution,  even though the value of your investment (plus cash received,  if
any) will not have  increased.  In  addition,  the  share  price at the time you
purchase  shares may  include  unrealized  gains in the  securities  held in the
investment portfolio of the fund. If these portfolio securities are subsequently
sold and the gains are realized,  they will, to the extent not offset by capital
losses, be paid to you as a distribution of capital gains and will be taxable to
you as short-term or long-term capital gains.
    

    In January of the year  following the  distribution,  if you own shares in a
taxable account, you will receive a Form 1099-DIV notifying you of the status of
your distributions for federal income tax purposes.

    Distributions may also be subject to state and local taxes, even if all or a
substantial  part  of such  distributions  are  derived  from  interest  on U.S.
government  obligations  which,  if you received them directly,  would be exempt
from state income tax. However, most but not all states allow this tax exemption
to pass  through  to fund  shareholders  when a fund pays  distributions  to its
shareholders.  You should  consult your tax advisor about the tax status of such
distributions in your own state.

   
    If you have not complied  with certain  provisions  of the Internal  Revenue
Code and  regulations,  either we or your financial  intermediary is required by
federal law to withhold and remit to the IRS 31% of reportable  payments  (which
may include  dividends,  capital gains  distributions  and  redemptions).  Those
regulations  require  you to  certify  that the  Social  Security  number or tax
identification number you provide is correct and that you are not subject to 31%
withholding for previous  under-reporting  to the IRS. You will be asked to make
the appropriate certification on your application.  Payments reported by us that
omit your Social Security number or tax identification number will subject us to
a penalty  of $50,  which will be charged  against  your  account if you fail to
provide  the  certification  by  the  time  the  report  is  filed,  and  is not
refundable.

    Redemption of shares of a fund  (including  redemptions  made in an exchange
transaction)  will be a taxable  transaction for federal income tax purposes and
shareholders  will generally  recognize a gain or loss in an amount equal to the
difference  between  the basis of the shares and the amount  received.  Assuming
that  shareholders hold such shares as a capital asset, the gain or loss will be
a capital gain or loss and will generally be considered long-term subject tax at
a maximum rate of 28% (28% rate gain/loss) if shareholders have held such shares
for a period of more than 12 months  but not more than 18 months  and  long-term
subject to tax at a maximum rate of 20%,  minimum of 10% (20% rate gain/loss) if
shareholders have held such shares for
    


18    ADDITIONAL INFORMATION YOU SHOULD KNOW      AMERICAN CENTURY INVESTMENTS


   
a period of more than 18 months. If a loss is realized on the redemption of fund
shares,  the  reinvestment  in  additional  fund shares within 30 days before or
after the  redemption  may be subject to the "wash sale"  rules of the  Internal
Revenue Code,  resulting in a postponement  of the  recognition of such loss for
federal income tax purposes.
    

MANAGEMENT

INVESTMENT MANAGEMENT

   
    The Funds are  diversified,  open-end series of the American  Century Target
Maturities Trust. Under the laws of the Commonwealth of Massachusetts, the Board
of Trustees is  responsible  for managing the business and affairs of the Trust.
Acting  pursuant to an  investment  management  agreement  entered into with the
funds,  American Century  Investment  Management,  Inc. serves as the investment
manager of the funds. Its principal place of business is American Century Tower,
4500 Main Street,  Kansas City,  Missouri 64111.  The manager has been providing
investment advisory services to investment  companies and institutional  clients
since it was founded in 1958.

    The manager supervises and manages the investment portfolio of each fund and
directs the purchase and sale of its investment securities. It utilizes teams of
portfolio managers, assistant portfolio managers and analysts acting together to
manage the assets of the funds.  The teams meet  regularly  to review  portfolio
holdings and to discuss purchase and sale activity. The teams adjust holdings in
the  funds'  portfolios  as they  deem  appropriate  in  pursuit  of the  funds'
investment  objectives.  Individual  portfolio  manager members of the teams may
also  adjust  portfolio  holdings  of the  funds or of  sectors  of the funds as
necessary between team meetings.
    

    The portfolio  manager  members of the teams managing the funds described in
this  Prospectus  and  their  work  experience  for the last  five  years are as
follows:

   
    CASEY COLTON,  Senior  Portfolio  Manager,  joined the Manager in 1990, as a
Municipal  Analyst  and has been a member of the team that  manages  the  Target
funds since January, 1996. Mr. Colton is a Chartered Financial Analyst.
    

    DAVID  SCHROEDER,  Vice President,  joined the Manager in 1990, and has been
primarily  responsible for the day-to-day operations of each of the Target funds
since July, 1990.

   
    JEREMY FLETCHER, Associate Portfolio Manager, joined the manager in 1991 and
has been a member of the team that manages the Target funds since August, 1997.
    

    The  activities  of the manager are subject only to directions of the funds'
Board of  Trustees.  The  manager  pays all the  expenses  of the  funds  except
brokerage,  taxes,  portfolio  insurance,  interest,  fees and  expenses  of the
non-interested  person  directors  (including  counsel  fees) and  extraordinary
expenses.

    For the services  provided to the funds,  the manager receives a monthly fee
based on a percentage of the average net assets of each fund. The annual rate at
which this fee is assessed is determined monthly in a two-step process: First, a
fee rate  schedule is applied to the assets of all of the bond funds  managed by
the manager (the Investment  Category Fee). Second, a separate fee rate schedule
is applied to the assets of all of the funds managed by the manager (the Complex
Fee).  The  Investment  Category  Fee and the  Complex  Fee are  then  added  to
determine  the  unified  management  fee  payable  by the  fund to the  manager.
Currently,  the Investment  Category Fee for each of the funds is an annual rate
of 0.29% of the average net assets of each fund. The Complex Fee is currently an
annual rate of 0.05% of the average net assets of each fund. Further information
about the calculation of the annual management fee is contained in the Statement
of Additional Information.

   
    On the first  business  day of each  month,  each  series  of  shares  pay a
management fee to the manager for the previous month at the specified  rate. The
fee for the previous month is calculated by  multiplying  the applicable fee for
such series by the  aggregate  average  daily  closing  value of the series' net
assets during the previous month,  and further by multiplying  that product by a
fraction, the numerator of which is the number of days in the previous month and
the denominator of which is 365 (366 in leap years).
    


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       19


CODE OF ETHICS

    The funds and the  manager  have  adopted  a Code of Ethics  that  restricts
personal  investing  practices by  employees of the manager and its  affiliates.
Among other  provisions,  the Code of Ethics requires that employees with access
to information about the purchase or sale of securities in the funds' portfolios
obtain  preclearance before executing personal trades. With respect to Portfolio
Managers  and  other  investment   personnel,   the  Code  of  Ethics  prohibits
acquisition  of securities  in an initial  public  offering,  as well as profits
derived from the purchase and sale of the same security within 60 calendar days.
These  provisions  are  designed  to  ensure  that  the  interests  of the  Fund
shareholders come before the interests of the people who manage those funds.

TRANSFER AND ADMINISTRATIVE SERVICES

   
    American  Century  Services  Corporation,  4500 Main  Street,  Kansas  City,
Missouri, 64111, acts as transfer agent and dividend-paying agent for the funds.
It provides  facilities,  equipment  and  personnel to the funds and is paid for
such services by the manager.
    

    Pursuant  to  a  Sub-Administration   Agreement  with  the  manager,   Funds
Distributor,  Inc. (FDI) serves as the  Co-Administrator  for the funds.  FDI is
responsible for (i) providing  certain  officers of the funds and (ii) reviewing
and filing  marketing and sales  literature on behalf of the funds. The fees and
expenses of FDI are paid by the manager.

    The manager and the transfer agent are both wholly-owned by American Century
Companies,  Inc. (ACC). James E. Stowers Jr., Chairman of the Board of Directors
of ACC,  controls  ACC by virtue of his  ownership  of a majority  of its common
stock.

DISTRIBUTION OF FUND SHARES

   
    The funds' shares are  distributed by FDI, a registered  broker-dealer  (the
distributor).  FDI is a wholly-owned indirect subsidiary of Boston Institutional
Group,  Inc. FDI's principal  business  address is 60 State Street,  Suite 1300,
Boston,  Massachusetts  02109.  As agent  for the  funds  and the  manager,  the
distributor enters into contracts with various banks, broker-dealers,  insurance
companies  and other  financial  intermediaries  with respect to the sale of the
funds' shares and/or the use of the funds' shares in various financial services.
The manager (or an affiliate) pays all expenses  incurred in promoting sales of,
and distributing the Advisor Class and in securing such services out of the Rule
12b-1 fees described in the section that follows.

    Investors  may  open  accounts  with  American   Century  only  through  the
distributor.  All purchase  transactions in the funds offered by this Prospectus
are  processed  by the  transfer  agent,  which  is  authorized  to  accept  any
instructions relating to fund accounts.  All purchase orders must be accepted by
the distributor.
    

SERVICE AND DISTRIBUTION FEES

    Rule  12b-1  adopted by the SEC under the  Investment  Company  Act  permits
investment  companies  that  adopt  a  written  plan  to  pay  certain  expenses
associated  with the  distribution  of their shares.  Pursuant to that rule, the
funds' Board of Trustees and the initial shareholder of the funds' Advisor Class
shares have approved and adopted a Master Distribution and Shareholder  Services
Plan (the Plan).  Pursuant to the Plan, each fund pays the manager a shareholder
services fee and a distribution  fee, each equal to 0.25% (for a total of 0.50%)
per annum of the  average  daily net assets of the shares of the fund's  Advisor
Class. The shareholder  services fee is paid for the purpose of paying the costs
of  securing  certain   shareholder  and   administrative   services,   and  the
distribution  fee is paid for the  purpose  of  paying  the  costs of  providing
various  distribution  services.  All or a portion  of such fees are paid by the
manager to the banks,  broker-dealers,  insurance  companies or other  financial
intermediaries through which such shares are made available.

    The Plan has been adopted and will be  administered  in accordance  with the
requirements  of Rule 12b-1 under the  Investment  Company Act.  For  additional
information  about  the  Plan  and  its  terms,  see  "Master  Distribution  and
Shareholder Services Plan" in the Statement of Additional Information. Fees paid
pursuant to the Plan may be paid for shareholder services and the maintenance of
accounts and therefore may constitute  "service fees" for purposes of applicable
rules of the National Association of Securities Dealers.


20    ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


FURTHER INFORMATION ABOUT AMERICAN CENTURY

    American  Century Target  Maturities  Trust was organized as a Massachusetts
business  trust  on  November  8,  1984.  The  Trust is an  open-end  management
investment  company.  Its business and affairs are managed by its officers under
the  direction of its Board of Trustees.  The  principal  office of the funds is
American  Century  Tower,  4500 Main  Street,  P. O. Box  419385,  Kansas  City,
Missouri  64141-6385.  All inquiries may be made by mail to that address,  or by
telephone to 1-800-345-3533 (international calls: 816-531-5575).

    The funds are individual series of the Trust which issues shares with no par
value.  The assets belonging to each series of shares are held separately by the
custodian and in effect each series is a separate  fund.  The funds do not issue
share certificates.

   
    American  Century Target  Maturities Trust offers two classes of each of the
funds offered by this  Prospectus:  an Investor Class and an Advisor Class.  The
shares offered by this Prospectus are Advisor Class shares.
    

    The Investor  Class is primarily made  available to retail  investors.  This
other class has different fees, expenses, and/or minimum investment requirements
than the Advisor Class.  The difference in the fee structures  among the classes
is the result of their separate  arrangements  for shareholder and  distribution
services and not the result of any difference in amounts  charged by the manager
for core investment advisory services. Accordingly, the core investment advisory
expenses  do not  vary  by  class.  Different  fees  and  expenses  will  affect
performance. For additional information concerning the Investor Class of shares,
call one of our Investor Services Representatives at 1-800-345-2021.

    Except as described  below,  all classes of shares of a fund have  identical
voting,  dividend,   liquidation  and  other  rights,  preferences,   terms  and
conditions.  The only  differences  among the various classes are (a) each class
may be subject to different  expenses specific to that class, (b) each class has
a different identifying designation or name, (c) each class has exclusive voting
rights with respect to matters solely  affecting such class,  and (d) each class
may have different exchange privileges.

    Each  share,  irrespective  of series or class,  is entitled to one vote for
each dollar of net asset value applicable to such share on all questions, except
for those  matters  which must be voted on  separately by the series or class of
shares affected.  Matters affecting only one series or class are voted upon only
by that series or class.

    Shares have  non-cumulative  voting rights,  which means that the holders of
more than 50% of the votes cast in an election of Trustees  can elect all of the
Trustees if they choose to do so, and in such event the holders of the remaining
votes will not be able to elect any person or persons to the Board of Trustees.

    Unless required by the Investment  Company Act, it will not be necessary for
the Trust to hold annual meetings of shareholders. As a result, shareholders may
not vote each year on the election of Trustees or the  appointment  of auditors.
However,  pursuant to the Trust's by-laws, the holders of shares representing at
least 10% of the votes  entitled  to be cast may  request  that the Trust hold a
special meeting of shareholders.  We will assist in the communication with other
shareholders.

    WE RESERVE THE RIGHT TO CHANGE ANY OF OUR POLICIES, PRACTICES AND PROCEDURES
DESCRIBED IN THIS PROSPECTUS, INCLUDING THE STATEMENT OF ADDITIONAL INFORMATION,
WITHOUT  SHAREHOLDER  APPROVAL  EXCEPT  IN  THOSE  INSTANCES  WHERE  SHAREHOLDER
APPROVAL IS EXPRESSLY REQUIRED.

    THIS  PROSPECTUS  CONSTITUTES AN OFFER TO SELL  SECURITIES OF A FUND ONLY IN
THOSE STATES WHERE THE FUND'S SHARES HAVE BEEN REGISTERED OR OTHERWISE QUALIFIED
FOR SALE. A FUND WILL NOT ACCEPT  APPLICATIONS  FROM PERSONS  RESIDING IN STATES
WHERE THE FUND'S SHARES ARE NOT REGISTERED.


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       21


P.O. BOX 419385
KANSAS CITY, MISSOURI
64141-6385

INVESTOR SERVICES:
1-800-345-3533 OR 816-531-5575

TELECOMMUNICATIONS DEVICE FOR THE DEAF:
1-800-345-1833 OR 816-444-3038

FAX: 816-340-4655

INTERNET: WWW.AMERICANCENTURY.COM


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


9802           [recycled logo]
SH-BKT-10355      Recycled
<PAGE>
                       STATEMENT OF ADDITIONAL INFORMATION

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

   
                                FEBRUARY 1, 1998
    

                                     BENHAM
                                  GROUP(reg.tm)

                                   Target 2000
                                   Target 2005
                                   Target 2010
                                   Target 2015
                                   Target 2020
                                   Target 2025


                      STATEMENT OF ADDITIONAL INFORMATION

   
                               FEBRUARY 1, 1998
    

                   AMERICAN CENTURY TARGET MATURITIES TRUST

   
This Statement is not a prospectus  but should be read in  conjunction  with the
Funds' current Prospectus,  dated February 1, 1998. The Funds' annual report for
the fiscal year ended September 30, 1997, is  incorporated by reference.  Please
retain  this  document  for future  reference.  To obtain the  Prospectus,  call
American Century Investments toll free at 1-800-345-2021  (international  calls:
816-531-5575) or write P.O. Box 419200, Kansas City, Missouri 64141-6200.
    

                               TABLE OF CONTENTS

   
Investment Policies and Techniques .........................................   2
Investment Restrictions ....................................................   2
Portfolio Transactions .....................................................   3
Valuation of Portfolio Securities ..........................................   3
Predictability of Return ...................................................   4
Performance ................................................................   6
Taxation of Debt Instruments ...............................................   7
About the Trust ............................................................   8
Multiple Class Structure ...................................................   9
Trustees and Officers ......................................................  10
Management .................................................................  12
Transfer and Administrative Services .......................................  15
Distribution of Fund Shares ................................................  15
Additional Purchase and Redemption Information .............................  15
Other Information ..........................................................  17
    


     STATEMENT OF ADDITIONAL INFORMATION                                       1


INVESTMENT POLICIES AND TECHNIQUES

    The  following  paragraphs  provide  a  more  detailed  description  of  the
securities  and  investment  practices  identified  in  the  Prospectus.  Unless
otherwise  noted,  the  policies  described  in  this  Statement  of  Additional
Information are not fundamental and may be changed by the Board of Trustees.

LOANS OF PORTFOLIO SECURITIES

    Each Fund may lend its portfolio  securities to earn additional income. If a
borrower defaults on a securities loan, the lending Fund could experience delays
in recovering  the securities it loaned;  if the value of the loaned  securities
increased  over the value of the  collateral,  the Fund could suffer a loss.  To
minimize the risk of default on securities  loans,  American Century  Investment
Management,  Inc. (the "Manager") adheres to the following guidelines prescribed
by the Board of  Trustees  governing  lending of  securities.  These  guidelines
strictly  govern (1) the type and amount of collateral  that must be received by
the Fund; (2) the circumstances under which additions to that collateral must be
made by borrowers; (3) the return received by the Fund on the loaned securities;
(4) the limitations on the percentage of Fund assets on loan; and (5) the credit
standards applied in evaluating potential borrowers of portfolio securities.  In
addition,  the guidelines require that the Fund have the option to terminate any
loan of a portfolio  security at any time and set  requirements  for recovery of
securities from borrowers.

INVESTMENT RESTRICTIONS

    The Funds'  investment  restrictions  are set forth below.  These investment
restrictions  are  fundamental  and may not be changed  without  approval  of "a
majority of the outstanding  vote of  shareholders"  of a Fund, as determined in
accordance  with the  Investment  Company Act of 1940 (the  "Investment  Company
Act").

    AS A FUNDAMENTAL POLICY, EACH FUND SHALL NOT:

1)    issue senior securities, except as permitted under the Investment
      Company Act of 1940.

2)    borrow  money,  except  that the Fund may borrow  money for  temporary  or
      emergency  purposes (not for  leveraging or  investment)  in an amount not
      exceeding  331/3%  of  the  Fund's  total  assets  (including  the  amount
      borrowed) less liabilities (other than borrowings).

3)    lend any security or make any other loan if, as a result, more than 331/3%
      of the Fund's  total assets would be lent to other  parties,  except,  (i)
      through the purchase of debt  securities in accordance with its investment
      objective,  policies and  limitations,  or (ii) by engaging in  repurchase
      agreements with respect to portfolio securities.

4)    purchase or sell real estate  unless  acquired as a result of ownership of
      securities  or other  instruments.  This policy shall not prevent the Fund
      from investment in securities or other  instruments  backed by real estate
      or securities of companies  that deal in real estate or are engaged in the
      real estate business.

5)    concentrate  its  investments  in  securities  of issuers in a  particular
      industry  (other  than  securities   issued  or  guaranteed  by  the  U.S.
      government or any of its agencies or instrumentalities).

6)    act as an underwriter of securities issued by others, except to the extent
      that the Fund may be considered an  underwriter  within the meaning of the
      Securities Act of 1933 in the disposition of restricted securities.

7)    purchase  or sell  physical  commodities  unless  acquired  as a result of
      ownership  of  securities  or  other   instruments;   provided  that  this
      limitation  shall not prohibit the Fund from purchasing or selling options
      and futures contracts or from investing in securities or other instruments
      backed by physical commodities.

8)    invest for purposes of exercising control over management.

    In addition,  the Funds are subject to the following  additional  investment
restrictions  which  are not  fundamental  and may be  changed  by the  Board of
Trustees.

    AS AN OPERATING POLICY, EACH FUND:

a)    shall not purchase  additional  investment  securities  at any time during
      which outstanding borrowings exceed 5% of the total assets of the Fund.

b)    shall not purchase any security or enter into a repurchase  agreement  if,
      as a  result,  more  than  15% of its net  assets  would  be  invested  in
      repurchase agreements not entitling the holder to


2                                                AMERICAN CENTURY INVESTMENTS


      payment of principal and interest within seven days and in securities that
      are illiquid by virtue of legal or contractual  restrictions  on resale or
      the absence of a readily available market.

c)    shall not sell securities short, unless it owns or has the right to obtain
      securities equivalent in kind and amount to the securities sold short, and
      provided that transaction in futures  contracts and options are not deemed
      to constitute selling securities short.

d)    shall not purchase  securities on margin,  except that the Fund may obtain
      such   short-term   credits  as  are   necessary   for  the  clearance  of
      transactions, and provided that margin payments in connection with futures
      contracts and options on futures contracts shall not constitute purchasing
      securities on margin.

    For purposes of the investment restriction (5), relating to concentration, a
Fund shall not  purchase  any  securities  which  would cause 25% or more of the
value of the Fund's  total  assets at the time of purchase to be invested in the
securities of one or more issuers conducting their principal business activities
in the same industry,  provided that (a) there is no limitation  with respect to
obligations issued or guaranteed by the U.S. government, any state, territory or
possession  of the United  States,  the  District  of  Columbia  or any of their
authorities,   agencies,   instrumentalities   or  political   subdivisions  and
repurchase  agreements  secured by such  instruments;  (b) wholly-owned  finance
companies  will be considered to be in the  industries of their parents if their
activities are primarily related to financing the activities of the parents; (c)
utilities will be divided  according to their  services,  for example,  gas, gas
transmission, electric and gas, electric and telephone will each be considered a
separate  industry;  and (d) personal credit and business credit businesses will
be considered separate industries.

    Unless  otherwise   indicated,   percentage   limitations  included  in  the
restrictions  apply at the time the transactions are entered into.  Accordingly,
any later increase or decrease beyond the specified  limitation resulting from a
change in the Fund's net assets will not be considered in determining whether it
has complied with these investment restrictions.

 PORTFOLIO TRANSACTIONS

    Each Fund's assets are invested by the Manager in a manner  consistent  with
the Fund's  investment  objectives,  policies,  and  restrictions,  and with any
instructions  the Board of  Trustees  may issue from time to time.  Within  this
framework,  the Manager is responsible for making all  determinations  as to the
purchase and sale of portfolio  securities and for taking all steps necessary to
implement securities transactions on behalf of the Funds.

    In placing  orders for the purchase and sale of  portfolio  securities,  the
Manager  will  use its best  efforts  to  obtain  the best  possible  price  and
execution and will otherwise place orders with broker-dealers  subject to and in
accordance  with any  instructions  the Board of Trustees may issue from time to
time. The Manager will select  broker-dealers to execute portfolio  transactions
on behalf of the Funds solely on the basis of best price and execution.

    U.S.  government  securities  generally  are traded in the  over-the-counter
market through broker-dealers. A broker-dealer is a securities firm or bank that
makes a market  for  securities  by  offering  to buy at one price and sell at a
slightly higher price. The difference between these prices is known as a spread.

   
    The Manager  expects to execute  most  transactions  on a net basis  through
broker-dealers  unless it is determined  that a better price or execution can be
obtained on a commission basis through a broker.  Portfolio  securities may also
be purchased directly from the issuer.  The Funds paid no brokerage  commissions
during the fiscal years ended September 30, 1997, 1996, and 1995.
    

    Each Fund may hold portfolio securities until they mature, or it may sell or
otherwise  dispose of these  securities,  replacing  them with other  securities
consistent  with its investment  objectives and policies.  The Funds'  portfolio
turnover rates appear in the Financial Highlights section of the Prospectus.

VALUATION OF PORTFOLIO SECURITIES

    Each Fund's net asset value per share  ("NAV") is  calculated as of one hour
before the close of business of the New York Stock  Exchange  (the  "Exchange"),
usually 3 p.m. Central time each day the Exchange


STATEMENT OF ADDITIONAL INFORMATION                                            3


   
is open for business. The Exchange has designated the following holiday closings
for 1998:  New Year's Day  (observed),  Martin Luther King Jr. Day,  Presidents'
Day, Good Friday,  Memorial Day,  Independence Day, Labor Day, Thanksgiving Day,
and  Christmas  Day  (observed).  Although  the Funds  expect  the same  holiday
schedule  to be  observed in the  future,  the  Exchange  may modify its holiday
schedule at any time.
    

    Each Fund's share price is  calculated  by adding the value of all portfolio
securities and other assets,  deducting liabilities,  and dividing the result by
the number of shares outstanding.  Expenses and interest on portfolio securities
are accrued daily.

    Most  securities  held by the Funds are priced at market  value using prices
obtained from an  independent  pricing  service.  Because of the large number of
zero-coupon  Treasury  obligations  available,  many do not trade  each day.  In
valuing  these  securities,  the pricing  service  generally  takes into account
institutional  trading,  trading  in  similar  groups  of  securities,  and  any
developments related to specific securities.

    The methods used by the pricing  service and the  valuations so  established
are  reviewed  by the  Manager  under the  general  supervision  of the Board of
Trustees.  There are a number of pricing services available, and the Manager, on
the  basis of  ongoing  evaluation  of these  services,  may use  other  pricing
services or discontinue the use of any pricing service in whole or in part.

    Securities  maturing  within 60 days of the valuation  date may be valued at
amortized cost,  which is cost plus or minus any amortized  discount or premium,
unless the Trustees  determine that this would not result in fair valuation of a
given security. Other assets and securities for which quotations are not readily
available are valued in good faith at their fair value using methods approved by
the Board of Trustees.

PREDICTABILITY OF RETURN

    ANTICIPATED VALUE AT MATURITY.  The maturity values of zero-coupon bonds are
specified at the time the bonds are issued, and this feature,  combined with the
ability to  calculate  yield to  maturity,  has made these  instruments  popular
investment vehicles for investors seeking reliable investments to meet long-term
financial goals.

    To provide a comparable investment  opportunity while allowing investors the
flexibility  to  purchase  or  redeem  shares  each  day the  Trust  is open for
business,  each Fund  consists  primarily of  zero-coupon  bonds but is actively
managed to accommodate  shareholder  activity and to take advantage of perceived
market  opportunities.  Because of this active management approach,  the Manager
does not guarantee that a certain price per share will be attained by the time a
Fund is liquidated. Instead, the Manager attempts to track the price behavior of
a directly held zero-coupon bond by:

(1)   Maintaining a weighted  average maturity within the Fund's target maturity
      year;

(2)   Investing at least 90% of assets in securities that mature within one year
      of the Fund's target maturity year;

(3)   Investing a  substantial  portion of assets in  Treasury  STRIPS (the most
      liquid Treasury zero);

(4)   Under normal conditions, maintaining a cash balance of less than 1%;

(5)   Executing portfolio  transactions necessary to accommodate net shareholder
      purchases or redemptions on a daily basis; and

(6)   Whenever feasible,  contacting several U.S. government  securities dealers
      for each  intended  transaction  in an effort to obtain  the best price on
      each transaction.

    These  measures  enable the advisor to  calculate  an  anticipated  value at
maturity (AVM) for each Fund that approximates the price per share the Fund will
achieve  by its  weighted  average  maturity  date.  The AVM  calculation  is as
follows:


                             AVM = P(1+AGR/2)(2T)


where P = the Fund's  current price per share, T = the Fund's  weighted  average
term to maturity in years, and AGR = the anticipated growth rate.

    This calculation assumes that the shareholder will reinvest all dividend and
capital gain  distributions  (if any).  It also  assumes an expense  ratio and a
portfolio


4                                                American Century Investments


composition that remain constant for the life of the Fund. Because Fund expenses
and composition do not remain constant,  however, the Manager calculates AVM for
each Fund each day the Trust is open for business.

    In addition to the measures  described above, which the Manager believes are
adequate to assure close correspondence  between the price behavior of each Fund
and the price  behavior  of  directly  held  zero-coupon  bonds with  comparable
maturities, the Trust has made an undertaking to the staff of the Securities and
Exchange  Commission  (SEC)  that each Fund will  invest at least 90% of its net
assets in zero-coupon bonds until it is within four years of its target maturity
year and at least 80% of its net assets in zero-coupon securities while the Fund
is within two to four years of its target maturity year. This undertaking may be
revoked if the market supply of zero-coupon securities diminishes  unexpectedly,
although it will not be revoked without prior  consultation  with the SEC staff.
In addition,  the Manager has undertaken that any coupon-bearing  bond purchased
on behalf of a Fund will have a  duration  that falls  within the Fund's  target
maturity year.

    ANTICIPATED  GROWTH RATE. The Manager also calculates an anticipated  growth
rate  (AGR)  for each Fund  each day the  Trust is open for  business.  AGR is a
calculation of the annualized  rate of growth an investor may expect from his or
her  purchase  date to the  Fund's  target  maturity  date.  As is the case with
calculations of AVM, the AGR calculation assumes that the investor will reinvest
all  dividends  and  capital  gain  distributions  (if any) and that the  Fund's
expense ratio and portfolio  composition will remain  constant.  Each Fund's AGR
changes from day to day primarily because of changes in interest rates and, to a
lesser extent, to changes in portfolio composition and other factors that affect
the value of the Fund's investments.

    The Manager expects that  shareholders  who hold their shares until a Fund's
weighted  average  maturity date and who reinvest all dividends and capital gain
distributions  (if any),  will realize an investment  return and maturity  value
that do not differ  substantially from the AGR and AVM calculated on the day his
or her shares were purchased.

    The following  table  illustrates  investor  experience  with Target 1990, a
series  of the Trust  that was first  offered  on March 25,  1985,  and that was
liquidated on AMERICAN CENTURY INVESTMENTS

   January 25, 1991.  This table is not indicative of the future  performance of
the existing Funds.

                    Share                       Weighted
                   Price (P)                     Average           AVM
Date                (in $)          AGR       Maturity (T)       (in $)
- -------------------------------------------------------------------------
April 1985           56.03         10.58          5.64           100.25
June                 60.62         9.68           5.42           101.17
September            62.72         9.44           5.08           100.23
December             67.75         8.26           4.95           101.15
March 1986           73.60         6.86           4.69           100.98
June                 74.80         6.83           4.38           100.38
September            76.82         6.59           4.16           100.63
December             79.01         6.27           3.86           100.26
March 1987           79.88         6.34           3.59            99.93
June                 79.01         7.21           3.27            99.63
September            77.28         8.57           3.14           100.62
December             81.02         7.52            2.7            99.33
March 1988           83.61         6.98           2.51            99.33
June                 83.97         6.55           2.62            99.42
September            84.96         6.97           2.09            98.04
December             85.70         8.39           1.68            98.38
March 1989           86.76         9.18           1.50            99.25
June                 90.47         7.57           1.23            99.16
September            91.91         7.81           0.98            99.08
December             94.00         7.38           0.74            99.17
March 1990           95.62         7.68           0.52            99.44
June                 97.48         7.44           0.32            99.82
September            99.32         6.73           0.15           100.31
December            101.13         4.33           0.07           101.43
- -------------------------------------------------------------------------

   
   Calculations  in the table above may not reconcile  precisely due to rounding
of share price, AGR, and weighted average maturity to two decimal points.
    

   Note that the Target  1990's share price on December  31,  1990,  was not the
same as its AVM on that date  because the Fund had not yet been  liquidated  and
still held short-term Treasury  securities with a 25-day maturity.  The Fund was
liquidated on January 25, 1991, at a final share price of $101.46.

   As a further  demonstration  of how the Funds have  behaved  over  time,  the
following tables show each Fund's AGR and AVM as of September 30 for each of the
past five years.


     STATEMENT OF ADDITIONAL INFORMATION                                      5


   
                  9/30/93        9/30/94       9/30/95      9/30/96      9/30/97
                    AGR            AGR           AGR          AGR           AGR
- --------------------------------------------------------------------------------
Target 2000        4.66%          6.76%         5.37%        5.75%         5.24%
Target 2005        5.53           7.33          5.75         6.17          5.57
Target 2010        5.92           7.54          6.04         6.44          5.80
Target 2015        6.04           7.56          6.21         6.58          5.93
Target 2020        6.02           7.52          6.20         6.59          5.98
Target 2025         N/A            N/A           N/A         6.43          5.86
- --------------------------------------------------------------------------------

                9/30/93         9/30/94       9/30/95        9/30/96     9/30/97
                  AVM             AVM           AVM            AVM          AVM
- --------------------------------------------------------------------------------
Target 2000     $100.21       $100.86        $100.99       $101.10       $101.13
Target 2005      100.21        100.58         100.32        100.71        100.85
Target 2010      100.94        101.38         101.02        102.53        103.40
Target 2015      106.84        107.95         109.62        110.11        110.52
Target 2020      100.76        102.11         102.31        103.60        104.84
Target 2025       N/A            N/A           N/A          109.24        110.88
- --------------------------------------------------------------------------------
    


    The Funds' share prices and growth rates are not  guaranteed by the Trust or
any of its affiliates. There is no guarantee that the Funds' AVMs will fluctuate
as little in the future as they have in the past.

PERFORMANCE

    The Funds' yields and total returns may be quoted in  advertising  and sales
literature.  These figures,  as well as the Funds' share prices will vary.  Past
performance should not be considered as indicative of future results.

    Yield quotations are based on the investment  income per share earned during
a  particular  30-day  period,  less  expenses  accrued  during the period  (net
investment income),  and are computed by dividing a Fund's net investment income
by its share price on the last day of the  period,  according  to the  following
formula:

                        YIELD = 2 [(a - b + 1)(6) - 1]
                                       -------
                                         cd

where a = dividends and interest earned during the period,  b = expenses accrued
for the period (net of  reimbursements),  c = the average daily number of shares
outstanding during the period that were entitled to receive  dividends,  and d =
the maximum offering price per share on the last day of the period.

   
    Each Fund's yield for the 30-day period ended September 30, 1997, calculated
using the SEC yield formula described above, is indicated below.

Fund                        30-Day Yield
- ----------------------------------------
Target 2000                    5.51%
Target 2005                    5.82%
Target 2010                    6.02%
Target 2015                    6.12%
Target 2020                    6.19%
Target 2025                    6.00%
- ----------------------------------------
    

    Total returns quoted in advertising and sales literature reflect all aspects
of a Fund's return,  including the effect of  reinvesting  dividends and capital
gain distributions and any change in the Fund's NAV during the period.

    Average  annual total returns are  calculated by  determining  the growth or
decline in value of a  hypothetical  historical  investment  in a Fund  during a
stated period and then calculating the annually compounded  percentage rate that
would have  produced  the same  result if the rate of growth or decline in value
had been constant  throughout the period. For example, a cumulative total return
of 100% over ten years would produce an average annual return of 7.18%, which is
the steady annual rate that would equal 100% growth on a compounded  basis in 10
years.  While average  annual total returns are a convenient  means of comparing
investment  alternatives,  investors should realize that a Funds' performance is
not constant over time, but changes from  year-to-year,  and that average annual
total  returns  represent  averaged  figures as  opposed to actual  year-to-year
performance.

   
    The  Funds'  average  annual  total  returns  for the  one-year,  five-year,
ten-year,  and  life-of-fund  periods ended September 30, 1997, are indicated in
the following table.
    


6                                                AMERICAN CENTURY INVESTMENTS


   
                   Average Annual Total Returns
                       One-        Five-        Ten-     Life-of-
Fund                   Year        Year         Year      Fund
- -----------------------------------------------------------------
Target 2000(1)         7.64%       6.72%       11.43%     12.59%
Target 2005(1)        11.60%       9.40%       13.66%     14.48%
Target 2010(1)        15.75%      11.50%       15.10%     15.79%
Target 2015(2)        19.96%      13.46%       15.56%     10.59%
Target 2020(3)        23.50%      14.79%         N/A      11.12%
Target 2025(4)        24.34%        N/A          N/A       7.35%
- -----------------------------------------------------------------
(1) Commenced operations on March 25, 1985.
(2) Commenced operations on September 1, 1986.
(3) Commenced operations on December 29, 1989.
(4) Commenced operations on February 16, 1996.
    

    In addition to average annual total returns,  each Fund may quote unaveraged
or  cumulative  total  returns  reflecting  the  simple  change  in  value of an
investment over a stated period. Average annual and cumulative total returns may
be quoted as percentages or as dollar amounts and may be calculated for a single
investment,  a series of investments,  or a series of redemptions  over any time
period.  Total  returns may be broken down into their  components  of income and
capital  (including  capital gains and changes in share price) to illustrate the
relationship of these factors and their contributions to total return.

    The Funds'  performance may be compared with the performance of other mutual
funds  tracked by mutual  fund rating  services or with other  indexes of market
performance.  This may include  comparisons with funds that, unlike the American
Century funds, are sold with a sales charge or deferred sales charge. Sources of
economic  data that may be used for such  comparisons  may include,  but are not
limited to, U.S. Treasury bill, note, and bond yields, money market fund yields,
U.S.  government debt and percentage held by foreigners,  the U.S. money supply,
net  free  reserves,  and  yields  on  current-coupon  GNMAs  (source:  Board of
Governors of the Federal Reserve  System);  the federal funds and discount rates
(source:  Federal  Reserve  Bank of New York);  yield  curves for U.S.  Treasury
securities and AA/AAA-rated  corporate  securities (source:  Bloomberg Financial
Markets);  yield curves for AAA-rated  tax-free  municipal  securities  (source:
Telerate);  yield curves for foreign government  securities (sources:  Bloomberg
Financial  Markets and Data  Resources,  Inc.);  total  returns on foreign bonds
(source:  J.P.  Morgan  Securities  Inc.);  various U.S. and foreign  government
reports;  the junk bond market (source:  Data Resources,  Inc.); the CRB Futures
Index  (source:  Commodity  Index Report);  the price of gold  (sources:  London
a.m./p.m.  fixing and New York Comex Spot Price); rankings of any mutual fund or
mutual fund category tracked by Lipper Analytical Services, Inc. or Morningstar,
Inc.;  mutual  fund  rankings   published  in  major,   nationally   distributed
periodicals;  data  provided  by  the  Investment  Company  Institute;  Ibbotson
Associates,  Stocks, Bonds, Bills, and Inflation;  major indexes of stock market
performance;  and  indexes and  historical  data  supplied  by major  securities
brokerage or investment advisory firms. The Funds may also utilize reprints from
newspapers  and magazines  furnished by third  parties to illustrate  historical
performances.

   
MULTIPLE CLASS PERFORMANCE ADVERTISING

    Pursuant to the Multiple Class Plan, the funds may issue additional  classes
of existing  funds or introduce  new funds with multiple  classes  available for
purchase.  To the extent a new class is added to an existing  fund,  the manager
may, in compliance with SEC and NASD rules,  regulations and guidelines,  market
the new class of shares  using the  historical  performance  information  of the
original class of shares. When quoting performance information for the new class
of shares for  periods  prior to the first full  quarter  after  inception,  the
original class'  performance will be restated to reflect the expenses of the new
class.  For  periods  after the  first  full  quarter  after  inception,  actual
performance of the new class will be used.

TAXATION OF DEBT INSTRUMENTS

    For Federal income tax purposes,  debt securities purchased by the funds may
be treated as having  original  issue  discount.  Original  issue  discount  can
generally be defined as the excess of the stated redemption price at maturity of
a debt  obligation  over the issue price.  Original issue discount is treated as
interest earned by the fund for Federal income tax purposes,  whether or not any
income is  actually  received,  and  therefore  is subject  to the  distribution
requirements  of the Code.  However,  original  issue  discount  with respect to
tax-exempt obligations gen-
    


STATEMENT OF ADDITIONAL INFORMATION                                            7


   
erally will be excluded from a fund's  taxable  income.  Original issue discount
with respect to  tax-exempt  securities is accrued and added to the adjusted tax
basis of such  securities for purposes of determining  gain or loss upon sale or
at maturity.  Generally, the amount of original issue discount for any period is
determined on the basis of a constant yield to maturity which takes into account
the  compounding  of  accrued  interest.  Under  section  1286 of the  Code,  an
investment in a stripped bond or stripped  coupon will result in original  issue
discount.

    A fund may purchase debt securities at a discount which exceeds the original
issue price plus  previously  accrued  original issue discount  remaining on the
securities,  at the time of purchase. This additional discount represents market
discount for income tax  purposes.  Generally,  market  discount is accrued on a
daily basis.

    A fund may purchase debt securities at a premium,  i.e., at a purchase price
in excess of face amount.  With respect to  tax-exempt  securities,  the premium
must be  amortized  to the  maturity  date but no  deduction  is allowed for the
premium amortization. Instead, the amortized bond premium will reduce the fund's
adjusted tax basis in the securities. For taxable securities, the premium may be
amortized if the fund so elects.  The amortized premium on taxable securities is
allowed as a deduction, and, generally for securities issued after September 27,
1985, must be amortized under a constant yield method.
    

ABOUT THE TRUST

    American Century Target  Maturities  Trust (the "Trust"),  formerly known as
Benham Target Maturities Trust, is a registered open-end  management  investment
company that was  organized  as a  Massachusetts  business  trust on November 8,
1984.  The  Declaration  of Trust  permits  the  Board of  Trustees  to issue an
unlimited  number of full and fractional  shares of beneficial  interest without
par value,  which may be issued in series (or  Funds).  Shares  issued are fully
paid and nonassessable and have no preemptive, conversion, or similar rights.

    Currently,  there are six series of the Trust,  as  follows:  Target  2000 ,
Target 2005,  Target 2010,  Target 2015 , Target 2020 and Target 2025. The table
below  lists each  Fund's  current and former  name.  The Board of Trustees  may
create additional  series from time to time. In addition,  the Board of Trustees
may liquidate a series at the conclusion of its target maturity year.

    Shares of each Fund have  equal  voting  rights,  although  each Fund  votes
separately on matters affecting it exclusively. Voting rights are not cumulative
so that investors holding more than 50% of the Trust's outstanding shares may be
able to elect a Board of Trustees. The Trust has instituted dollar-based voting,
meaning  that the number of votes you are  entitled  to is based upon the dollar
amount of your  investment.  The election of Trustees is determined by the votes
received  from all Trust  shareholders  without  regard to whether a majority of
shares of any one series voted in favor of a particular  nominee or all nominees
as a group.

    Each shareholder has rights to dividends and distributions declared by their
series and to the net assets of such series upon its  liquidation or dissolution
proportionate to his or her share ownership interest in the series.

    Shareholders  of  a  Massachusetts   business  trust  could,  under  certain
circumstances,  be held  personally  liable for its  obligations.  However,  the
Declaration of

<TABLE>
        FUND NAME AS OF JANUARY, 1997                                         FORMER FUND NAME
- -----------------------------------------------------------------------------------------------------------
<S>                                                         <C>           
American Century--Benham Target Maturities Trust: 2000       Benham Target Maturities Trust 2000 Portfolio
American Century--Benham Target Maturities Trust: 2005       Benham Target Maturities Trust 2005 Portfolio
American Century--Benham Target Maturities Trust: 2010       Benham Target Maturities Trust 2010 Portfolio
American Century--Benham Target Maturities Trust: 2015       Benham Target Maturities Trust 2015 Portfolio
American Century--Benham Target Maturities Trust: 2020       Benham Target Maturities Trust 2020 Portfolio
American Century--Benham Target Maturities Trust: 2025       Benham Target Maturities Trust 2025 Portfolio
- -----------------------------------------------------------------------------------------------------------
</TABLE>


8                                             AMERICAN CENTURY INVESTMENTS


Trust  contains  an express  disclaimer  of  shareholder  liability  for acts or
obligations  of  the  Trust.   The   Declaration  of  Trust  also  provides  for
indemnification and reimbursement of expenses of any shareholder held personally
liable for obligations of the Trust.  The Declaration of Trust provides that the
Trust  will,  upon  request,  assume the  defense of any claim made  against any
shareholder  for any act or  obligation  of the Trust and satisfy  any  judgment
thereon.  The Declaration of Trust further  provides that the Trust may maintain
appropriate insurance (for example, fidelity,  bonding, and errors and omissions
insurance)  for  the  protection  of  the  Trust,  its  shareholders,  Trustees,
officers,  employees,  and agents to cover possible tort and other  liabilities.
Thus,  the  risk  of a  shareholder  incurring  financial  loss as a  result  of
shareholder  liability  is limited  to  circumstances  in which both  inadequate
insurance exists and the Trust is unable to meet its obligations.

    CUSTODIAN BANKS:  Chase Manhattan Bank, 4 Chase Metrotech Center,  Brooklyn,
New York 11245 and  Commerce  Bank,  N.A.,  1000 Walnut,  Kansas City,  Missouri
64106,  serve as  custodians  of the Funds'  assets.  Services  provided  by the
custodians  include (i) settling  portfolio  purchases and sales, (ii) reporting
failed trades,  (iii)  identifying  and collecting  portfolio  income,  and (iv)
providing safekeeping of securities.  The custodians take no part in determining
the Funds'  investment  policies or in determining  which securities are sold or
purchased by the Funds.

   
    INDEPENDENT AUDITORS: KPMG Peat Marwick LLP, 1000 Walnut, Suite 1600, Kansas
City, Missouri 64106,  served as the Trust's  independent  auditors and provided
services including the audit of the annual financial statements.

    For the fiscal year,  which started on October 1, 1997,  the Trustees of the
Funds have selected  Coopers & Lybrand LLP to serve as  independent  auditors of
the Funds. The address of Coopers & Lybrand LLP is City Center Square, 1100 Main
Street, Suite 900, Kansas City, Missouri 64105-2140.
    

MULTIPLE CLASS STRUCTURE

    The  funds'  Board of  Trustees  has  adopted  a  multiple  class  plan (the
"Multiclass  Plan") pursuant to Rule 18f-3 adopted by the SEC.  Pursuant to such
plan, the funds may issue up to three classes of funds:  an Investor  Class,  an
Institutional Class and an Advisor Class. Not all funds offer all three classes

    The Investor Class is made available to investors directly by the investment
manager  through  its  affiliated  broker-dealer,  American  Century  Investment
Services,  Inc.,  for a  single  unified  management  fee,  without  any load or
commission.  The  Institutional  and  Advisor  Classes  are  made  available  to
institutional  shareholders  or  through  financial  intermediaries  that do not
require  the same level of  shareholder  and  administrative  services  from the
Manager as  Investor  Class  shareholders.  As a result,  the Manager is able to
charge  these  classes  a lower  unified  management  fee.  In  addition  to the
management  fee,  however,  the  Advisor  Class  shares are  subject to a Master
Distribution  and  Shareholder  Services  Plan. The plan has been adopted by the
funds' Board of Trustees and initial  shareholder in accordance  with Rule 12b-1
adopted by the SEC under the Investment Company Act.

RULE 12B-1

    Rule 12b-1 permits an investment company to pay expenses associated with the
distribution  of its shares in accordance  with a plan adopted by the investment
company's Board of Trustees and approved by its  shareholders.  Pursuant to such
rule, the Board of Trustees and initial  shareholder of the funds' Advisor Class
have approved and entered into a Master  Distribution  and Shareholder  Services
Plan,  with respect to the Advisor Class (the "Plan").  The Master  Distribution
and Shareholder Services Plan is described below.

    In adopting  the Plan,  the Board of Trustees  [including a majority who are
not  "interested  persons"  of the funds (as defined in the  Investment  Company
Act), hereafter referred to as the "independent trustees"] determined that there
was a  reasonable  likelihood  that the Plan  would  benefit  the  funds and the
shareholders of the affected  class.  Pursuant to Rule 12b-1,  information  with
respect to revenues  and  expenses  under the Plan is  presented to the Board of
Trustees quarterly for its consideration in connection with its deliberations as
to the continuance of the Plan.  Continuance of the Plan must be approved by the
Board of Trustees (including a majority of the


STATEMENT OF ADDITIONAL INFORMATION                                            9


independent  trustees) annually.  The Plan may be amended by a vote of the Board
of Trustees (including a majority of the independent trustees),  except that the
Plan may not be  amended  to  materially  increase  the  amount  to be spent for
distribution  without  majority  approval of the  shareholders  of the  affected
class.  The Plan terminates  automatically in the event of an assignment and may
be terminated upon a vote of a majority of the  independent  trustees or by vote
of a majority of the outstanding voting securities of the affected class.

    All fees paid under the Plan will be made in  accordance  with Section 26 of
the Rules of Fair Practice of the National  Association  of  Securities  Dealers
(NASD).

MASTER DISTRIBUTION AND SHAREHOLDER SERVICES PLAN

    As described in the  Prospectuses,  the funds'  Advisor  Class of shares are
made available to participants in employer-sponsored retirement or savings plans
and to  persons  purchasing  through  financial  intermediaries,  such as banks,
broker-dealers  and insurance  companies.  The Distributor enters into contracts
with various  banks,  broker-dealers,  insurance  companies and other  financial
intermediaries  with respect to the sale of the funds'  shares and/or the use of
the funds' shares in various  investment  products or in connection with various
financial services.

    Certain  recordkeeping and administrative  services that are provided by the
funds' transfer agent for the Investor Class  shareholders may be performed by a
plan sponsor (or its agents) or by a financial  intermediary for shareholders in
the Advisor Class.  In addition to such services,  the financial  intermediaries
provide various distribution services.

    To enable  the funds'  shares to be made  available  through  such plans and
financial  intermediaries,  and to compensate them for such services, the funds'
investment  manager  has  reduced  its  management  fee by 0.25% per annum  with
respect to the Advisor Class shares and the funds' Board of Trustees has adopted
a Master Distribution and Shareholder  Services Plan (the "Distribution  Plan").
Pursuant to such Plan,  the Advisor  Class shares pay the  Distributor  a fee of
0.50% annually of the aggregate average daily assets of the funds' Advisor Class
shares, 0.25% of which is paid for Shareholder Services (as described above) and
0.25% of which is paid for distribution services.

    Distribution  services  include any activity  undertaken or expense incurred
that is primarily intended to result in the sale of Advisor Class shares,  which
services  may  include  but  are  not  limited  to,  (a) the  payment  of  sales
commission,   ongoing  commissions  and  other  payments  to  brokers,  dealers,
financial  institutions  or others who sell  Advisor  Class  shares  pursuant to
Selling  Agreements;  (b)  compensation to registered  representatives  or other
employees of  Distributor  who engage in or support  distribution  of the funds'
Advisor Class shares; (c) compensation to, and expenses  (including overhead and
telephone  expenses)  of the  Distributor;  (d) the  printing  of  prospectuses,
statements  of  additional  information  and  reports  for other  than  existing
shareholders; (e) the preparation, printing and distribution of sales literature
and advertising  materials  provided to the funds'  shareholders and prospective
shareholders;  (f)  receiving  and  answering  correspondence  from  prospective
shareholders,  including  distributing  prospectuses,  statements  of additional
information,  and shareholder reports; (g) the providing of facilities to answer
questions  from  prospective  investors  about fund shares;  (h) complying  with
federal and state  securities  laws  pertaining to the sale of fund shares;  (i)
assisting  investors in completing  application forms and selecting dividend and
other  account  options;  (j) the  providing of other  reasonable  assistance in
connection  with  the  distribution  of  fund  shares;  (k) the  organizing  and
conducting  of  sales  seminars  and  payments  in  the  form  of  transactional
compensation  or promotional  incentives;  (l) profit on the foregoing;  (m) the
payment of "service fees" for the provision of personal,  continuing services to
investors,  as  contemplated  by the Rules of Fair  Practice of the NASD and (n)
such other distribution and services activities as the Manager determines may be
paid for by the funds  pursuant to the terms of this Agreement and in accordance
with Rule 12b-1 of the Investment Company Act.

TRUSTEES AND OFFICERS

    The Trust's  activities  are overseen by a Board of Trustees,  including six
independent Trustees. The individuals listed, beginning in the next column,


10                                               AMERICAN CENTURY INVESTMENTS


   
whose names are marked by an asterisk (*) are "interested  persons" of the Trust
(as  defined  in  the  Investment   Company  Act)  by  virtue  of,  among  other
considerations,  their affiliation with either the Trust; the Trust's investment
advisor,  American Century  Investment  Management,  Inc.; the Trust's agent for
transfer and  administrative  services,  American Century  Services  Corporation
(ACS); the Trust's distribution agent and  co-administrator,  Funds Distributor,
Inc. (FDI); their parent corporation,  American Century Companies, Inc. (ACC) or
ACC's subsidiaries;  or other funds advised by the Manager.  Each Trustee listed
below serves as a Trustee or Director of other funds advised by the Manager.
    

    Unless otherwise noted, dates in parentheses  indicate the dates the Trustee
or officer began his or her service in a particular capacity.  The Trustees' and
officers'  address with the exception of Mr.  Stowers III and Ms. Roepke is 1665
Charleston Road, Mountain View, California 94043. The address of Mr. Stowers III
and Ms.  Roepke is  American  Century  Tower,  4500 Main  Street,  Kansas  City,
Missouri 64111.

   
TRUSTEES
    

    ALBERT A. EISENSTAT,  independent Trustee (1995). Mr. Eisenstat is currently
the general partner of Discovery  Ventures (1996), a venture capital firm. He is
also an independent  Director of each of Commercial  Metals Co. (1982),  Sungard
Data Systems (1991) and Business  Objects S/A (1994).  Previously,  he served as
Executive Vice  President of Corporate  Development  and Corporate  Secretary of
Apple Computer and served on its Board of Directors (1985 to 1993).

   
    RONALD J.  GILSON,  independent  Trustee  (1995).  Mr.  Gilson is Charles J.
Meyers  Professor of Law and Business at Stanford Law School (1979) and the Mark
and Eva Stern Professor of Law and Business at Columbia University School of Law
(1992). Previously, he was counsel to Marron, Reid & Sheehy (a San Francisco law
firm, 1984).

    *WILLIAM M. LYONS,  Trustee (1998). Mr. Lyons is President,  Chief Operating
Officer and General Counsel of ACC; Executive Vice President and General Counsel
of ACS and ACIS; Assistant Secretary of ACC; and Secretary of ACS and ACIS.
    

    MYRON S. SCHOLES,  independent Trustee (1985). Mr. Scholes is a principal of
Long-Term  Capital  Management  (1993).  He is also Frank E. Buck  Professor  of
Finance at the  Stanford  Graduate  School of Business  (1983) and a Director of
Dimensional  Fund Advisors  (1982) and the Smith Breeden Family of Funds (1992).
From August 1991 to June 1993,  Mr.  Scholes was a Managing  Director of Salomon
Brothers Inc. (securities brokerage).

    KENNETH E. SCOTT,  independent Trustee (1985). Mr. Scott is Ralph M. Parsons
Professor of Law and  Business at Stanford  Law School  (1972) and a Director of
RCM Capital Funds, Inc. (1994).

    ISAAC STEIN, independent Trustee (1992). Mr. Stein is former Chairman of the
Board  (1990 to 1992) and Chief  Executive  Officer  (1991 to 1992) of Esprit de
Corp.  (clothing  manufacturer).  He  is  a  member  of  the  Board  of  Raychem
Corporation (electrical equipment, 1993), President of Waverley Associates, Inc.
(private   investment   firm,   1983),   and  a  Director  of  ALZA  Corporation
(pharmaceuticals,  1987). He is also a Trustee of Stanford University (1994) and
Chairman of Stanford Health Services (hospital, 1994).

   
    *JAMES E. STOWERS  III,  Chairman of the Board of Trustees  (1998);  Trustee
(1995).  Mr. Stowers III is Chief  Executive  Officer and Director of ACC; Chief
Executive Officer and Director of ACS and ACIS.
    

    JEANNE D. WOHLERS,  independent  Trustee  (1985).  Ms.  Wohlers is a private
investor and an independent Director and partner of Windy Hill Productions,  LP.
Previously,  she served as Vice President and Chief Financial Officer of Sybase,
Inc. (software company, 1988 to 1992).

OFFICERS

   
    RICHARD W. INGRAM;  President (1998);  Executive Vice President and Director
of Client Services and Treasury  Administration of FDI. Mr. Ingram joined FDI in
1995.  Prior to joining FDI, Mr.  Ingram  served as Vice  President and Division
Manager of First Data Investor Services Group, Inc. (from March 1994 to November
1995), and before that as Vice President, Assistant Treasurer and Tax Director -
Mutual Funds of The Boston Company, Inc. (from 1989 to 1994).
    


STATEMENT OF ADDITIONAL INFORMATION                                       11


   
    *DOUGLAS A. PAUL,  Secretary  (1988),  Vice  President  (1990),  and General
Counsel (1990); Vice President and Associate General Counsel, ACS.

    *MARYANNE ROEPKE,  CPA, Chief Financial  Officer and Treasurer (1995);  Vice
President (1998); Vice President and Assistant Treasurer of ACS.

    CHRISTOPHER J. KELLEY,  Vice President (1998);  Vice President and Associate
General Counsel of FDI. Mr. Kelley joined FDI in 1996. Prior to joining FDI, Mr.
Kelley served as Assistant  Counsel at Forum Financial Group (from April 1994 to
July 1996), and before that as a compliance officer for Putnam Investments (from
1992 to 1994).

    MARY A.  NELSON;  Vice  President  (1998);  Vice  President  and  Manager of
Treasury  Services and  Administration  of FDI. Ms.  Nelson  joined FDI in 1995.
Prior to joining FDI, Ms. Nelson served as Assistant  Vice  President and Client
Manager for The Boston Company, Inc. (from 1989 to 1994).

    *PATRICK A. LOOBY,  Vice  President and  Assistant  Secretary  (1998);  Vice
President of ACS.

    *JON ZINDEL,  Tax Officer (1997);  Director of Taxation (1996); Tax Manager,
Price Waterhouse LLP (1989).

    As of January 5, 1998, the Funds' Trustees and officers,  as a group,  owned
less than 1% of each Fund's total shares outstanding.

    *C. JEAN WADE, Controller (1996).

    The table on the next page  summarizes  the  compensation  that the Trustees
received for the Funds'  fiscal year ended  September  30, 1997,  as well as the
compensation received for serving as a Director or Trustee of the other funds.
    
MANAGEMENT

    Each Fund has an  investment  management  agreement  with the Manager  dated
August 1, 1997.  This agreement was approved by the  shareholders of each of the
Funds on July 30, 1997.

    For the services  provided to the Funds,  the Manager receives a monthly fee
based on a percentage of the average net assets of each Fund. The annual rate at
which this fee is assessed is determined monthly in a two-step process: First, a
fee rate  schedule  is  applied  to the  assets  of all of the funds in a fund's
investment  category  (Bond  Funds)  which  are  managed  by  the  Manager  (the
"Investment  Category Fee").  Second, a separate fee rate schedule is applied to
the  assets of all of the mutual  funds  managed by the  Manager  (the  "Complex
Fee").  The  Investment  Category  Fee and the  Complex  Fee are  then  added to
determine the unified management fee payable by the Fund to the Manager.

    The  schedule  by which the  Investment  Category  Fee is  determined  is as
follows:

   
Category Assets                                                    Fee Rate
- ---------------------------------------------------------------------------
First $1 billion                                                   0.3600%
Next $1 billion                                                    0.3080%
Next $3 billion                                                    0.2780%
Next $5 billion                                                    0.2580%
Next $15 billion                                                   0.2450%
Next $25 billion                                                   0.2430%
Thereafter                                                         0.2425%
- ---------------------------------------------------------------------------
    

    The Complex Fee Schedule (Investor Class) is as follows:

Complex Assets                                                     Fee Rate
- ---------------------------------------------------------------------------
First $2.5 billion                                                 0.3100%
Next $7.5 billion                                                  0.3000%
Next $15.0 billion                                                 0.2985%
Next $25.0 billion                                                 0.2970%
Next $50.0 billion                                                 0.2960%
Next $100.0 billion                                                0.2950%
Next $100.0 billion                                                0.2940%
Next $200.0 billion                                                0.2930%
Next $250.0 billion                                                0.2920%
Next $500.0 billion                                                0.2910%
Thereafter                                                         0.2900%
- ---------------------------------------------------------------------------


    The Complex Fee schedule for the Institutional  Class is lower by 0.2000% at
each graduated  step. For example,  if the Investor Class Complex Fee is 0.3000%
for the  first $2  billion,  the  Institutional  Class  Complex  Fee is  0.1000%
(0.3000% minus  0.2000%) for the first $2 billion.  The Complex Fee schedule for
the Advisor Class is lower by 0.2500% at each graduated step.

    On the first  business day of each month,  the Funds pay a management fee to
the  Manager  for the  previous  month at the  specified  rate.  The fee for the
previous month is calculated by  multiplying  the applicable fee for the Fund by
the  aggregate  average  daily  closing  value of a Fund's net assets during the
previous  month by a fraction,  the  numerator of which is the number of days in
the previous month and the denominator of which is 365 (366 in leap years).


12                                                AMERICAN CENTURY INVESTMENTS

<TABLE>
<CAPTION>
TRUSTEE COMPENSATION FOR THE FISCAL YEAR ENDED SEPTEMBER 30, 1997

                                Aggregate        Pension or Retirement             Estimated             Total Compensation
   Name of                    Compensation      Benefits Accrued As Part        Annual Benefits      From the American Century
  Trustee*                   From The Fund          of Fund Expenses            Upon Retirement           Family of Funds**
- --------------------------------------------------------------------------------------------------------------------------------
<S>                     <C>                     <C>                             <C>                      <C>                       
   
Albert A. Eisenstat     $1,310  (Target 2000)        Not Applicable             Not Applicable               $59,500
                         1,281  (Target 2005)
                         1,127  (Target 2010)
                         1,134  (Target 2015)
                         2,045  (Target 2020)
                         1,053  (Target 2025)
- --------------------------------------------------------------------------------------------------------------------------------
Ronald J. Gilson        $1,343  (Target 2000)        Not Applicable             Not Applicable               $61,250
                         1,312  (Target 2005)
                         1,139  (Target 2010)
                         1,146  (Target 2015)
                         2,146  (Target 2020)
                         1,066  (Target 2025)
- --------------------------------------------------------------------------------------------------------------------------------
Myron S. Scholes        $1,219  (Target 2000)        Not Applicable             Not Applicable               $55,250
                         1,200  (Target 2005)
                         1,089  (Target 2010)
                         1,094  (Target 2015)
                         1,731  (Target 2020)
                         1,043  (Target 2025)
- --------------------------------------------------------------------------------------------------------------------------------
Kenneth E. Scott        $1,509  (Target 2000)        Not Applicable             Not Applicable               $68,750
                         1,463  (Target 2005)
                         1,209  (Target 2010)
                         1,220  (Target 2015)
                         2,717  (Target 2020)
                         1,089  (Target 2025)
- --------------------------------------------------------------------------------------------------------------------------------
Ezra Solomon***          $319   (Target 2000)        Not Applicable              Not Applicable               $5,000
                          313   (Target 2005)
                          279   (Target 2010)
                          281   (Target 2015)
                          485   (Target 2020)
                          261   (Target 2025)
- --------------------------------------------------------------------------------------------------------------------------------
Isaac Stein             $1,334  (Target 2000)        Not Applicable             Not Applicable               $60,750
                         1,304  (Target 2005)
                         1,136  (Target 2010)
                         1,143  (Target 2015)
                         2,118  (Target 2020)
                         1,063  (Target 2025)
- --------------------------------------------------------------------------------------------------------------------------------
Jeanne D. Wohlers       $1,411  (Target 2000)        Not Applicable             Not Applicable               $64,250
                         1,373  (Target 2005)
                         1,170  (Target 2010)
                         1,178  (Target 2015)
                         2,388  (Target 2020)
                         1,069  (Target 2025)
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>
    

*     Interested Trustees receive no compensation for their services as such.

**    Includes  compensation  paid by the 15 investment  company  members of the
      American Century family of funds.

***   Retired December, 1996.


        STATEMENT OF ADDITIONAL INFORMATION                                  13


    The management  agreement  shall continue in effect until the earlier of the
expiration  of two  years  from the date of its  execution  or until  the  first
meeting of  shareholders  following such execution and for as long thereafter as
its  continuance  is  specifically  approved at least annually by (1) the Funds'
Board of Trustees, or by the vote of a majority of outstanding votes (as defined
in the Investment Company Act) and (2) by the vote of a majority of the Trustees
of the Funds who are not parties to the agreement or  interested  persons of the
Manager,  cast in person at a meeting  called for the  purpose of voting on such
approval.

    The  management  agreement  provides  that it may be  terminated at any time
without payment of any penalty by the Funds' Board of Trustees,  or by a vote of
a  majority  of the  Funds'  shareholders,  on 60 days'  written  notice  to the
Manager, and that it shall be automatically terminated if it is assigned.

    The  management  agreement  provides that the Manager shall not be liable to
the Funds or its shareholders for anything other than willful  misfeasance,  bad
faith, gross negligence or reckless disregard of its obligations and duties.

    The  management  agreement  also provides that the Manager and its officers,
trustees and employees may engage in other  business,  devote time and attention
to any other  business  whether of a similar or  dissimilar  nature,  and render
services to others.

    Certain  investments  may be  appropriate  for the  Funds and also for other
clients  advised by the Manager.  Investment  decisions  for the Funds and other
clients are made with a view to achieving their respective investment objectives
after  consideration of such factors as their current holdings,  availability of
cash for investment,  and the size of their investment  generally.  A particular
security  may be bought or sold for only one client or series,  or in  different
amounts  and at  different  times for more than one but less than all clients or
series. In addition, purchases or sales of the same security may be made for two
or more clients or series on the same date. Such  transactions will be allocated
among  clients in a manner  believed by the Manager to be equitable to each.  In
some cases this procedure could have an adverse effect on the price or amount of
the securities purchased or sold by a Fund.

    The  Manager  may  aggregate  purchase  and sale  orders of the  Funds  with
purchase  and sale orders of its other  clients when the Manager  believes  that
such aggregation  provides the best execution for the Funds. The Funds' Board of
Trustees has approved the policy of the Manager with respect to the  aggregation
of portfolio  transactions.  Where portfolio  transactions have been aggregated,
the Funds  participate at the average share price for all  transactions  in that
security on a given day and share  transaction  costs on a pro rata  basis.  The
Manager  will not  aggregate  portfolio  transactions  of the  Funds  unless  it
believes such  aggregation is consistent with its duty to seek best execution on
behalf  of the  Funds and the terms of the  management  agreement.  The  Manager
receives  no  additional  compensation  or  remuneration  as a  result  of  such
aggregation.

    In addition to managing the Funds,  the Manager  also acts as an  investment
advisor to 12 institutional  accounts and to the following registered investment
companies:  American Century Mutual Funds,  Inc.,  American Century World Mutual
Funds, Inc., American Century Premium Reserves,  Inc., American Century Variable
Portfolios,  Inc., American Century Capital  Portfolios,  Inc., American Century
Strategic Asset Allocations,  Inc.,  American Century Municipal Trust,  American
Century  Government Income Trust,  American Century  Investment Trust,  American
Century California Tax-Free and Municipal Funds,  American Century  Quantitative
Equity Funds and American Century International Bond Funds.

    Prior to  August  1,  1997,  Benham  Management  Corporation  served  as the
investment  advisor to the Funds.  Benham  Management  Corporation  is, like the
Manager, wholly-owned by ACC.

   
    Investment  advisory  fees  paid by each  Fund for the  fiscal  years  ended
September 30, 1997,  1996, and 1995, are indicated in the following  table.  Fee
amounts are net of amounts reimbursed or recouped.
    


14                                                AMERICAN CENTURY INVESTMENTS


   
                   Investment Advisory Fees*
- ----------------------------------------------------------------
                     Fiscal             Fiscal          Fiscal
Fund                  1997               1996            1995
- ----------------------------------------------------------------
Target 2000         $902,194          $815,109         $984,031
Target 2005          875,825           672,052          420,328
Target 2010          380,066           368,802          175,368
Target 2015          386,638           410,846          336,887
Target 2020        2,691,970         2,525,244          422,436
Target 2025          181,630            13,420               --
- ----------------------------------------------------------------
    

*Net of reimbursements

TRANSFER AND ADMINISTRATIVE SERVICES

    American  Century  Services  Corporation,  4500 Main  Street,  Kansas  City,
Missouri, 64111, acts as transfer agent and dividend paying agent for the Funds.
It provides physical  facilities,  including  computer hardware and software and
personnel,  for the day-to-day  administration  of the Funds and of the Manager.
The Manager pays American Century Services Corporation for such services.

    Prior  to  August  1,  1997,  the  Funds  paid  American   Century  Services
Corporation  directly  for its  services  as transfer  agent and  administrative
services agent.

   
    Administrative  service  and  transfer  agent fees paid by each Fund for the
fiscal years ended  September  30, 1997,  1996,  and 1995,  are indicated in the
following tables. Fee amounts are net of reimbursements.

                     Administrative Fees
- ----------------------------------------------------------------
                      Fiscal       Fiscal             Fiscal
Fund                   1997         1996               1995
- ----------------------------------------------------------------
Target 2000         $207,663      $274,837          $274,835
Target 2005          193,216       217,047           121,534
Target 2010           85,820       106,951            64,928
Target 2015           89,672       117,664           108,475
Target 2020          685,160       744,692           185,592
Target 2025           42,716        14,090                --
- ----------------------------------------------------------------

                       Transfer Agent Fees
- ----------------------------------------------------------------
                    Fiscal     Fiscal             Fiscal
Fund                 1997       1996               1995
- ----------------------------------------------------------------
Target 2000       $196,492     $267,353          $285,145
Target 2005        213,613      266,687           183,211
Target 2010        131,294      178,493           130,450
Target 2015        132,040      178,562           202,013
Target 2020        618,798      858,442           350,332
Target 2025         57,380       32,597                --
- ----------------------------------------------------------------
    

DISTRIBUTION OF FUND SHARES

   
    The Funds' shares are  distributed by Funds  Distributor,  Inc.  (FDI).  The
Manager pays all expenses for promoting and distributing the Fund shares offered
by this  Prospectus.  The Funds do not pay any  commissions or other fees to the
distributor  or to any  other  broker-dealers  or  financial  intermediaries  in
connection with the distribution of Fund shares.
    

ADDITIONAL PURCHASE AND REDEMPTION INFORMATION

    The Funds'  shares are  continuously  offered at net asset  value.  American
Century  may reject or limit the  amount of an  investment  to  prevent  any one
shareholder or affiliated group from controlling the Trust or one of its series;
to avoid  jeopardizing  a series'  tax status;  or  whenever,  in the  Manager's
opinion,  such  rejection  or  limitation  is in the  Trust's  or  series'  best
interest. As of January 5, 1998, to the Funds' knowledge, no shareholder was the
record  holder or beneficial  owner of 5% or more of a Fund's total  outstanding
shares except for those listed below.


STATEMENT OF ADDITIONAL INFORMATION                                          15


   
FUND                                   TARGET 2000
- ---------------------------------------------------------------------------
Shareholder Name and                   Charles Schwab & Co.
Address                                101 Montgomery Street
                                       San Francisco, CA 94101-4122
- ---------------------------------------------------------------------------
# of Shares Held                       422,409
- ---------------------------------------------------------------------------
% of Total Shares
Outstanding                            15.3%
- ---------------------------------------------------------------------------


FUND                                   TARGET 2005
- ---------------------------------------------------------------------------
Shareholder Name and                   Charles Schwab & Co.
Address                                101 Montgomery Street
                                       San Francisco, CA 94101
- ---------------------------------------------------------------------------
# of Shares Held                       763,404
- ---------------------------------------------------------------------------
% of Total Shares
Outstanding                            17.1%
- ---------------------------------------------------------------------------


FUND                                   TARGET 2010
- ---------------------------------------------------------------------------
Shareholder Name and                   Charles Schwab & Co.
Address                                101 Montgomery Street
                                       San Francisco, CA 94101-4122
- ---------------------------------------------------------------------------
# of Shares Held                       593,960
- ---------------------------------------------------------------------------
% of Total Shares
Outstanding                            19.7%
- ---------------------------------------------------------------------------


FUND                                   TARGET 2015
- ---------------------------------------------------------------------------
Shareholder Name and                   Charles Schwab & Co.
Address                                101 Montgomery Street
                                       San Francisco, CA 94101
- ---------------------------------------------------------------------------
# of Shares Held                       824,592
- ---------------------------------------------------------------------------
% of Total Shares
Outstanding                            26.1%
- ---------------------------------------------------------------------------


FUND                                   TARGET 2020
- ---------------------------------------------------------------------------
Shareholder Name and                   Charles Schwab & Co.
Address                                101 Montgomery Street
                                       San Francisco, CA 94101-4122
- ---------------------------------------------------------------------------
# of Shares Held                       6,357,487
- ---------------------------------------------------------------------------
% of Total Shares
Outstanding                            32.7%
- ---------------------------------------------------------------------------


FUND                                   TARGET 2025
- ---------------------------------------------------------------------------
Shareholder Name and                   Raymond James & Associates
Address                                P.O. Box 14547
                                       800 Carillon Pkwy
                                       St. Petersburg, FL 33716
- ---------------------------------------------------------------------------
# of Shares Held                       475,877
- ---------------------------------------------------------------------------
% of Total Shares
Outstanding                            6.2%
- ---------------------------------------------------------------------------
Shareholder Name and                   Charles Schwab & Co.
Address                                101 Montgomery Street
                                       San Francisco, CA 94101-4122
- ---------------------------------------------------------------------------
# of Shares Held                       2,504,870
- ---------------------------------------------------------------------------
% of Total Shares
Outstanding                            32.4%
- ---------------------------------------------------------------------------
    


    ACS charges  neither fees nor  commissions  on the purchase and sale of fund
shares.  However,  ACS may  charge  fees for  special  services  requested  by a
shareholder or necessitated by acts or omissions of a shareholder.  For example,
ACS may charge a fee for processing dishonored investment checks or stop-payment
requests. See the Investor Services Guide for more information.

    Share purchases and redemptions are governed by California law.


16                                        AMERICAN CENTURY INVESTMENTS


    FUND LIQUIDATIONS.  On or before January 31st of the year following a Fund's
target  maturity year, its  investments  will be sold or allowed to mature;  its
liabilities will be discharged, or a provision will be made for their discharge,
and its accounts will be closed.  A shareholder  may choose to redeem his or her
shares in one of the following  ways:  (i) by receiving  redemption  proceeds or
(ii) by exchanging  shares for shares of another  American  Century fund. If the
Fund  receives no  instructions  from a  shareholder,  his or her shares will be
exchanged for shares of American  Century-Benham Capital Preservation Fund (or a
similar  fund if Capital  Preservation  Fund is not  available).  The  estimated
expenses of terminating  and liquidating a Fund will be accrued ratably over its
target maturity year.  These  expenses,  which are charged to income (as are all
expenses), are not expected to exceed significantly the ordinary annual expenses
incurred  by a Fund  and,  therefore,  should  have  little  or no effect on the
maturity value of the Fund.

OTHER INFORMATION

    For  further  information,  please  refer  to  registration  statements  and
exhibits on file with the SEC in Washington,  DC. These  documents are available
upon payment of a  reproduction  fee.  Statements in the  Prospectus and in this
Statement  of  Additional  Information  concerning  the contents of contracts or
other  documents,  copies  of which are filed as  exhibits  to the  registration
statement, are qualified by reference to such contracts or documents.

    To reduce  expenses and  demonstrate  respect for our  environment,  we have
initiated a project  through which we will  eliminate  duplicate  copies of most
financial  reports and  prospectuses  to most  households  and  deliver  account
statements to most households in a single envelope,  even if they have more than
one account.  If  additional  copies of financial  reports and  prospectuses  or
separate mailing of account statements is desired, please call us.


STATEMENT OF ADDITIONAL INFORMATION                                      17


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

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

Automated Information Line:  
1-800-345-8765

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

Fax: 816-340-7962

Internet: www.americancentury.com

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

9802           [recycled logo]
SH-BKT-10356      Recycled
<PAGE>

AMERICAN CENTURY TARGET MATURITIES TRUST

1933 Act Post-Effective Amendment No. 28
1940 Act Amendment No. 30
- --------------------------------------------------------------------------------

PART C   OTHER INFORMATION

Item 24.  Financial Statements and Exhibits

(a)      FINANCIAL  STATEMENTS.  Audited financial statements for each series of
         the  Trust  for  the  fiscal  year  ended   September  30,  1997,   are
         incorporated  herein by reference  to the  Registrant's  Annual  Report
         dated  September  30, 1997 filed on  November  21,  1997  (Accession  #
         757928-97-000008).

(b)      EXHIBITS.

          (1)  (a)  Agreement  and  Declaration  of Trust dated May 31, 1995, is
               incorporated   herein   by   reference   to   Exhibit   1(b)   of
               Post-Effective  Amendment  No.  24 filed  on  November  29,  1995
               (Accession # 757928-95-000005).

               (b) Amendment to the Declaration of Trust dated October 21, 1996,
               is   incorporated   herein   by   reference   to   Exhibit  1  of
               Post-Effective   Amendment  No.  27  filed  on  August  28,  1997
               (Accession # 757928-97-000004).

               (c) Amendment to the  Declaration  of Trust dated August 1, 1997,
               is   incorporated   herein   by   reference   to   Exhibit  1  of
               Post-Effective   Amendment  No.  27  filed  on  August  28,  1997
               (Accession # 757928-97-000004).

          (2)  Amended and Restated Bylaws, dated May 17, 1995, are incorporated
               herein by reference to Exhibit 2 of Post-Effective  Amendment No.
               24 filed on November 29, 1995 (Accession # 757928-95-000005).

          (3)  Not applicable.

          (4)  Not applicable.

          (5)  (a)  Investor  Class  Investment   Management  Agreement  between
               American  Century Target  Maturities  Trust and American  Century
               Investment   Management,   Inc.,   dated   August  1,  1997,   is
               incorporated  herein by reference to Exhibit 5 of  Post-Effective
               Amendment #33 to the  Registration  Statement of American Century
               Government   Income  Trust,   filed  July  31,  1997   (Accession
               #773674-97-000014).

               (b)  Advisor  Class  Investment   Management   Agreement  between
               American  Century  Target  Maturities  Trust,   American  Century
               Government  Income Trust,  American  Century  International  Bond
               Funds,  and American  Century  Quantitative  Equity Funds,  dated
               August 1, 1997, is incorporated  herein by reference to Exhibit 5
               of  Post-Effective  Amendment  No.  27 filed on August  28,  1997
               (Accession # 757928-97-000004).

          (6)  Distribution Agreement between American Century Target Maturities
               Trust and Funds  Distributor,  Inc.,  dated  January  15, 1998 is
               included herein.

          (7)  Not applicable.

          (8)  Custodian   Agreement   between  American   Century   Investments
               (including   American  Century  Target  Maturities   Trust),  and
               The Chase Manhattan Bank,  dated August 9, 1996,  is incorporated
               herein by reference to Exhibit 8 of Post-Effective  Amendment #31
               to the  Registration  Statement for American  Century  Government
               Income    Trust,    filed    February    7,    1997    (Accession
               #773674-97-000002).

          (9)  Transfer  Agency   Agreement   between  American  Century  Target
               Maturities Trust and American Century Services Corporation, dated
               August 1, 1997, is incorporated  herein by reference to Exhibit 9
               of Post-Effective Amendment #33 to the Registration Statement for
               American Century  Government Income Trust, filed on July 31, 1997
               (Accession #773674-97-000014).

          (10) Opinion  and  consent  of  counsel  as to  the  legality  of  the
               securities   being   registered,   dated  November  14,  1997  is
               incorporated  herein by  reference to the Rule 24f-2 Notice filed
               on November 14, 1997 (Accession # 757928-96-000006).

          (11) Consent  of KPMG Peat  Marwick,  LLP,  independent  auditors,  is
               included herein.

          (12) Not applicable.

          (13) Not applicable.

          (14) (a)American Century Individual Retirement Account Plan, including
               all  instructions  and other relevant  documents,  dated February
               1992,   is   incorporated   by  reference  to  Exhibit  14(a)  to
               Post-Effective Amendment No. 20 filed on September 17, 1992.

               (b) American Century  Pension/Profit  Sharing plan, including all
               instructions and other relevant  documents,  dated February 1992,
               is incorporated  by reference to Exhibit 14(b) to  Post-Effective
               Amendment No. 20 filed on September 17, 1992.

          (15) Master  Distribution  and  Shareholder  Services Plan of American
               Century Government Income Trust,  American Century  International
               Bond Fund,  American Century Target Maturities Trust and American
               Century Quantitative Equity Funds (Advisor Class) dated August 1,
               1997  is  incorporated  herein  by  reference  to  Exhibit  15 of
               Post-Effective   Amendment  No.  27  filed  on  August  28,  1997
               (Accession # 757928-97-000004).

          (16) Schedule for computation of each performance  quotation  provided
               in response to Item 22 is included herein.

          (17) Power of Attorney dated January 15, 1998 is included herein.

          (18) Multiple Class Plan of American Century  California  Tax-Free and
               Municipal  Funds,   American  Century  Government  Income  Trust,
               American  Century  International  Bond  Funds,  American  Century
               Investment  Trust,  American Century  Municipal  Trust,  American
               Century Target Maturities Trust and American Century Quantitative
               Equity  Funds  dated  August  1, 1997 is  incorporated  herein by
               reference to Exhibit 18 of Post-Effective  Amendment No. 27 filed
               on August 28, 1997 (Accession # 757928-97-000004).

Item 25. Persons Controlled by or Under Common Control with Registrant.

Not applicable.

Item 26. Number of Holders of Securities.

As of December 31, 1997,  each Portfolio of American  Century Target  Maturities
Trust had the following number of shareholders of record:

                    Target 2000 ........................ 9,956
                    Target 2005 ........................11,797
                    Target 2010 ........................ 6,915
                    Target 2015 ........................ 6,149
                    Target 2020 ........................15,973
                    Target 2025 ........................ 3,147


Item 27. Indemnification.

As stated in Article VII,  Section 3 of the  Declaration of Trust,  incorporated
herein by reference to Exhibit 1 to the  Registration  Statement,  "The Trustees
shall be entitled  and  empowered  to the  fullest  extent  permitted  by law to
purchase  insurance  for and to  provide  by  resolution  or in the  Bylaws  for
indemnification  out  of  Trust  assets  for  liability  and  for  all  expenses
reasonably  incurred  or paid or  expected to be paid by a Trustee or officer in
connection  with any  claim,  action,  suit,  or  proceeding  in which he or she
becomes  involved by virtue of his or her capacity or former  capacity  with the
Trust.  The  provisions,  including any  exceptions and  limitations  concerning
indemnification,  may be set forth in detail  in the  Bylaws or in a  resolution
adopted by the Board of Trustees."

Registrant hereby  incorporates by reference,  as though set forth fully herein,
Article VI of the  Registrant's  Bylaws,  amended on May 17, 1995,  appearing as
Exhibit  2(b) of  Post-Effective  Amendment  No. 24 filed on  November  29, 1995
(Accession # 757928-95-000005).


Item 28. Business and Other Connections of Investment Advisor.

American Century Investment Management,  Inc., the investment manager to each of
the Registrant's  Funds, is engaged in the business of managing  investments for
deferred compensation plans and other institutional investors.


Item 29. Principal Underwriters.

The registrant's  distribution  agent, Funds Distributor,  Inc., is distribution
agent to American Century  California  California  Tax-Free and Municipal Funds,
American Century  Government  Income Trust,  American  Century  Municipal Trust,
American Century Target Maturities Trust,  American Century  Quantitative Equity
Funds,  American Century  International Bond Funds,  American Century Investment
Trust,  American Century  Variable  Portfolios,  Inc.,  American Century Capital
Portfolios,  Inc., American Century Mutual Funds, Inc., American Century Premium
Reserves, Inc., American Century Strategic Asset Allocations, Inc., and American
Century World Mutual  Funds,  Inc. The  information  required by this Item 29(b)
with respect to each director, officer and partner of FDI is incorporated herein
by  reference  to  Schedule  A of Form BD filed by FDI with the  Securities  and
Exchange  Commission  pursuant  to the  Securities  Act of 1934  (SEC  File  No.
8-20518).


Item 30. Location of Accounts and Records.

American Century Investment  Management,  Inc., the Registrant and its agent for
transfer and  administrative  services,  American Century Services  Corporation,
maintain  their  principal  office  at 4500  Main St.,  Kansas  City,  MO 64111.
American  Century Services  Corporation  maintains  physical  possession of each
account,  book,  or other  document,  and  shareholder  records as  required  by
ss.31(a) of the 1940 Act and rules  thereunder.  The  computer and data base for
shareholder  records are located at Central Computer  Facility,  401 North Broad
Street, Sixth Floor, Philadelphia, PA 19108.


Item 31. Management Services.

Not applicable.

Item 32. Undertakings.

Registrant  undertakes  to furnish each person to whom a Prospectus is delivered
with a copy of the  Registrant's  latest  annual  report to  shareholders,  upon
request and without charge.
<PAGE>
                                   SIGNATURES

Pursuant to the  requirements  of the  Securities Act of 1933 and the Investment
Company  Act of  1940,  the  Registrant  has  duly  caused  this  Post-Effective
Amendment No. 28/Amendment No. 30 to be signed on its behalf by the undersigned,
thereunto  duly  authorized,  in  the  City  of  Mountain  View,  and  State  of
California,  on the 27th  day of  January,  1998.  I hereby  certify  that  this
Amendment meets the  requirements for immediate  effectiveness  pursuant to Rule
485(b).

                              AMERICAN CENTURY TARGET MATURITIES TRUST


                              By: /s/ Douglas A. Paul
                                  Douglas A. Paul
                                  Secretary, Vice President and General Counsel

Pursuant to the requirements of the Securities Act of 1933, this  Post-Effective
Amendment No. 28/Amendment No. 30 has been signed below by the following persons
in the capacities and on the dates indicated.
<TABLE>
                                                                            Date
<S>                                  <C>                                    <C>
*                                    Trustee                                January 27, 1998
- ---------------------------------
Albert A. Eisenstat

*                                    Trustee                                January 27, 1998
- ---------------------------------
Ronald J. Gilson

*                                    Trustee                                January 27, 1998
- ---------------------------------
William M. Lyons

*                                    Trustee                                January 27, 1998
- ---------------------------------
Myron S. Scholes

*                                    Trustee                                January 27, 1998
- ---------------------------------
Kenneth E. Scott

*                                    Trustee                                January 27, 1998
- ---------------------------------
Isaac Stein

*                                    Chairman of the Board, Trustee         January 27, 1998
- ---------------------------------
James E. Stowers III

*                                    Trustee                                January 27, 1998
- ---------------------------------
Jeanne D. Wohlers

*                                    Treasurer                              January 27, 1998
- ---------------------------------
Maryanne Roepke
</TABLE>

/s/ Douglas A. Paul
*by Douglas A. Paul, Attorney in Fact (pursuant to a Power of Attorney dated 
January 15, 1998).


EXHIBIT     DESCRIPTION

EX-99.B1a   Agreement  and   Declaration   of  Trust  dated  May  31,  1995,  is
            incorporated  herein by reference to Exhibit 1(b) of  Post-Effective
            Amendment   No.  24  filed  on  November   29,  1995   (Accession  #
            757928-95-000005).

EX-99.B1b   Amendment to the  Declaration  of Trust dated  October 21, 1996,  is
            incorporated  herein by  reference  to  Exhibit 1 of  Post-Effective
            Amendment   No.  27  filed  on  August   28,   1997   (Accession   #
            757928-97-000004).

EX-99.B1c   Amendment  to the  Declaration  of Trust  dated  August 1, 1997,  is
            incorporated  herein by  reference  to  Exhibit 1 of  Post-Effective
            Amendment   No.  27  filed  on  August   28,   1997   (Accession   #
            757928-97-000004).

EX-99.B2    Amended and Restated  Bylaws,  dated May 17, 1995, are  incorporated
            herein by reference to Exhibit 2 of Post-Effective  Amendment No. 24
            filed on November 29, 1995 (Accession # 757928-95-000005).

EX-99.B5a   Investor Class  Investment  Management  Agreement  between  American
            Century  Target  Maturities  Trust and American  Century  Investment
            Management,  Inc.,  dated August 1, 1997, is incorporated  herein by
            reference  to  Exhibit  5 of  Post-Effective  Amendment  #33  to the
            Registration  Statement of American Century Government Income Trust,
            filed July 31, 1997 (Accession #773674-97-000014).

EX-99.B5b   Advisor  Class  Investment  Management  Agreement  between  American
            Century Target Maturities Trust,  American Century Government Income
            Trust,  American  Century  International  Bond Funds,  and  American
            Century   Quantitative  Equity  Funds,  dated  August  1,  1997,  is
            incorporated  herein by  reference  to  Exhibit 5 of  Post-Effective
            Amendment   No.  27  filed  on  August   28,   1997   (Accession   #
            757928-97-000004).

EX-99.B6    Distribution  Agreement  between American Century Target  Maturities
            Trust  and  Funds  Distributor,  Inc.,  dated  January  15,  1998 is
            included herein.

EX-99.B8    Custodian Agreement between American Century Investments  (including
            American Century Target Maturities  Trust),  and The Chase Manhattan
            Bank,  dated August 9, 1996, is incorporated  herein by reference to
            Exhibit  8 of  Post-Effective  Amendment  #31  to  the  Registration
            Statement  for  American  Century  Government  Income  Trust,  filed
            February 7, 1997 (Accession #773674-97-000002).

EX-99.B9    Transfer Agency Agreement between American Century Target Maturities
            Trust and American  Century  Services  Corporation,  dated August 1,
            1997,  is   incorporated   herein  by  reference  to  Exhibit  9  of
            Post-Effective  Amendment  #33 to  the  Registration  Statement  for
            American  Century  Government  Income Trust,  filed on July 31, 1997
            (Accession #773674-97-000014).

EX-99.B10   Opinion and consent of counsel as to the legality of the  securities
            being registered,  dated November 14, 1997 is incorporated herein by
            reference  to the Rule  24f-2  Notice  filed on  November  14,  1997
            (Accession # 757928-97-000006).

EX-99.B11   Consent of KPMG Peat Marwick, LLP, independent auditors, is included
            herein.

EX-99.B14a  American Century Individual  Retirement Account Plan,  including all
            instructions and other relevant  documents,  dated February 1992, is
            incorporated  by  reference  to  Exhibit  14(a)  to   Post-Effective
            Amendment No. 20 filed on September 17, 1992.

EX-99.B14b  American  Century   Pension/Profit   Sharing  plan,   including  all
            instructions and other relevant  documents,  dated February 1992, is
            incorporated  by  reference  to  Exhibit  14(b)  to   Post-Effective
            Amendment No. 20 filed on September 17, 1992.

EX-99.B15   Master  Distribution  and  Shareholder  Services  Plan  of  American
            Century Government Income Trust, American Century International Bond
            Fund,  American Century Target Maturities Trust and American Century
            Quantitative  Equity Funds  (Advisor  Class) dated August 1, 1997 is
            incorporated  herein by  reference  to Exhibit 15 of  Post-Effective
            Amendment   No.  27  filed  on  August   28,   1997   (Accession   #
            757928-97-000004).

EX-99.B16   Schedule for computation of each performance  quotation  provided in
            response to Item 22 is included herein.

EX-99.B17   Power of Attorney dated January 15, 1998 is included herein.

EX-99.B18   Multiple  Class Plan of American  Century  California  Tax-Free  and
            Municipal Funds,  American Century Government Income Trust, American
            Century International Bond Funds, American Century Investment Trust,
            American Century Municipal Trust, American Century Target Maturities
            Trust and American Century Quantitative Equity Funds dated August 1,
            1997  is   incorporated   herein  by  reference  to  Exhibit  18  of
            Post-Effective  Amendment No. 27 filed on August 28, 1997 (Accession
            # 757928-97-000004).

EX-27.5.1   FDS - Target 2000 

EX-27.5.2   FDS - Target 2005 

EX-27.5.3   FDS - Target 2010 

EX-27.5.4   FDS - Target 2015 

EX-27.5.5   FDS - Target 2020 

EX-27.5.6   FDS - Target 2025 

                             DISTRIBUTION AGREEMENT


         THIS  DISTRIBUTION  AGREEMENT is made and entered into this 15th day of
January,  1998,  by and  between  each  of the  open-end  management  investment
companies listed on SCHEDULE A, attached  hereto,  as of the dates noted on such
SCHEDULE A, together  with all other open end  management  investment  companies
subsequently  established  and made subject to this Agreement in accordance with
Section  11 (the  "Issuers")  and FUNDS  DISTRIBUTOR,  INC.  ("Distributor"),  a
Massachusetts corporation.

         WHEREAS,  the common stock of each of the Issuers is currently  divided
into a number of separate series of shares,  or funds,  each  corresponding to a
distinct  portfolio  of  securities,  and many of which  are also  divided  into
multiple classes of shares; and

         WHEREAS,  Distributor  is a  registered  as a  broker-dealer  with  the
Securities and Exchange  Commission ("SEC") under the Securities Exchange Act of
1934 and is a member of the National  Association of Securities  Dealers,  Inc.;
and

         WHEREAS,  American Century Investment Management,  Inc. (the "Manager")
is the registered investment adviser to the Issuers; and

         WHEREAS,  the Boards of  Directors/Trustees  of the Funds (the "Board")
wish to engage the Distributor to act as the distributor of the Funds;

         NOW,  THEREFORE,  in  consideration  of the mutual  promises  set forth
herein, the parties agree as follows:


Section 1.        General Responsibilities

Each Issuer hereby engages  Distributor  to act as exclusive  distributor of the
shares of each class of its separate series, and any other series and classes as
may be designated  from time to time hereafter (the "Funds").  The Funds subject
to this Distribution  Agreement are identified on SCHEDULE A, as the same may be
amended  from  time to  time.  Sales of a Fund's  shares  shall be made  only to
investors  residing  in those  states in which  such Fund is  registered.  After
effectiveness  of each  Fund's  registration  statement,  Distributor  will hold
itself available to receive,  as agent for the Funds, and will receive, by mail,
telex,  telephone,  and/or  such  other  method  as may be agreed  upon  between
Distributor and Issuers, orders for the purchase of Fund shares, and will accept
or reject such orders on behalf of the Funds in accordance  with the  provisions
of the applicable Fund's  prospectus.  Distributor will be available to transmit
such  orders as are so  accepted  to the Fund's  transfer  agent as  promptly as
possible  for  processing  at the  shares' net asset  value next  determined  in
accordance  with the  prospectuses.  Distributor  shall promptly  forward to the
Funds' custodian funds received in respect of purchases of shares.

a.   Offering Price.  All shares sold by Distributor  under this Agreement shall
     be sold at the net asset value per share ("Net Asset Value")  determined in
     the manner described in each Fund's  prospectus,  as it may be amended from
     time to time,  next computed  after the order is accepted by Distributor or
     its agents or affiliates. Each Fund shall determine and promptly furnish to
     Distributor  a  statement  of the Net Asset  Value of shares of said Fund's
     series at least once on each day on which the Fund is open for business, as
     described in its current prospectus.

b.   Promotion  Support.  Each Fund  shall  furnish  to  Distributor  for use in
     connection  with the  sale of its  shares  such  written  information  with
     respect  to said Fund as  Distributor  may  reasonably  request.  Each Fund
     represents and warrants that such  information,  when  authenticated by the
     signature  of one of its  officers,  shall be true and  correct.  Each Fund
     shall also furnish to Distributor copies of its reports to its shareholders
     and such additional  information  regarding said Fund's financial condition
     as  Distributor  may  reasonably  request.  Any  and  all  representations,
     statements   and   solicitations   respecting  a  Fund's   shares  made  in
     advertisements,  sales literature and in any other manner  whatsoever shall
     be  limited to and  conform in all  respects  to the  information  provided
     hereunder.

c.   Regulatory Compliance. Each Fund shall furnish to Distributor copies of its
     current  form of  prospectus,  as filed with the SEC,  in such  quantity as
     Distributor  may  reasonably  request  from  time to time,  and  authorizes
     Distributor  to use the  prospectus  in  connection  with  the sale of such
     Fund's shares. All such sales shall be initiated by offer of, and conducted
     in  accordance  with,  such  prospectus  and all of the  provisions  of the
     Securities  Act of 1933 ("1933 Act"),  the  Investment  Company Act of 1940
     ("1940  Act")  and all the rules and  regulations  thereunder.  Distributor
     shall furnish applicable federal and state regulatory  authorities with any
     information or reports  related to its services under this Agreement  which
     such  authorities  may lawfully  request in order to ascertain  whether the
     Funds'  operations  are being  conducted  in a manner  consistent  with any
     applicable law or regulations.

d.   Availability  of Shares.  Each Fund  agrees to sell  shares of that Fund so
     long as it has shares  available for sale and to cause each Fund's transfer
     agent to record on its books the ownership of (or deliver certificates,  if
     any,  for)  such  Shares  registered  in  such  names  and  amounts  as the
     Distributor  has requested in writing or other means of data  transmission,
     as  promptly  as  practicable  after  receipt by each Fund of the net asset
     value thereof and written request of the Distributor therefor.

e.   Federal  Registration of Shares.  Each Fund shall,  from time to time, take
     such steps as may be  necessary  to register its shares under the 1933 Act,
     including  payment of the related filing fee, to the end that there will be
     available for sale such number of shares as the Distributor may be expected
     to sell.  Each Fund  agrees to file,  from time to time,  such  amendments,
     reports and other  documents as may be necessary in order that there may be
     no untrue  statement  of a material  fact in a  registration  statement  or
     prospectus  pertaining  to the  Fund,  or no  omission  to state  therein a
     material fact required to be stated therein, which misstatement or omission
     would make the statements therein misleading.

f.   State Registration of Shares. Each Fund shall, from time to time, take such
     steps as may be necessary to qualify and maintain the  qualification  of an
     appropriate number of the shares of each Fund for sale under the securities
     laws of such states as the Distributor  and each Fund may approve,  and, if
     necessary or appropriate in connection  therewith,  to qualify and maintain
     the  qualification  of each  Fund as a broker  or  dealer  in such  states;
     provided  that each Fund shall not be  required  to amend its  Articles  of
     Incorporation,  Declaration  of Trust or By-laws to comply with the laws of
     any state,  to maintain an office in any state,  to change the terms of the
     offering  of the  shares  in any  state  from the  terms  set  forth in its
     registration statement and prospectus,  to qualify as a foreign corporation
     in any state or to consent  to  service of process in any state  other than
     with respect to claims arising out of the offering of the shares. If a Fund
     determines not to sell shares in a particular  state or  jurisdiction,  the
     Fund or its  Administrator  shall notify  Distributor and Distributor shall
     not sell  shares  in such  state or  jurisdiction.  The  Distributor  shall
     furnish such  information  and other  material  relating to its affairs and
     activities as may be required by such Fund (or Administrator) in connection
     with such qualifications.

g.   Sales  Through   Intermediaries.   Distributor   will  enter  into  selling
     agreements  with  various   financial   intermediaries   for  the  sale  or
     distribution of Fund shares. Any payment obligations arising thereunder for
     distribution services shall be made by Distributor or the Administrator, as
     paying agent for the Fund,  out of any 12b-1 fee payable by the  applicable
     Funds or, where  appropriate,  out of the profits the  Administrator  earns
     from fees earned under its Management Agreement with the Fund.

h.   Acceptance.  All orders  for the  purchase  of its  shares  are  subject to
     acceptance by each Fund.


Section 2.        Compensation

a.   Investor Class, Institutional Class and Single Class Shares. Except for the
     promises of the Funds  contained in this  Agreement  and their  performance
     thereof, Distributor shall not be entitled to compensation for its services
     hereunder with respect to the Investor Class or the Institutional  Class of
     shares or funds that offer a single class of shares.

b.   Advisor  Class and Service  Class  Shares.  For the  services  provided and
     expenses incurred by Distributor as described in Section 2 and Section 3 of
     the Master Distribution and Shareholder  Services Plan adopted by the Board
     with  respect to the  Advisor  Class of such  Funds,  and for the  services
     provided and expenses  incurred by Distributor as described in Section 2 of
     the  Shareholder  Services  Plan  adopted by the Board with  respect to the
     Service  Class  of such  Funds,  Distributor  shall be  compensated  by the
     Manager, not by the Funds.


Section 3.    Expenses

a.   Distributor  Expenses.  In  connection  with the sale and  distribution  of
     shares pursuant to this Agreement, the Distributor shall pay all of its own
     expenses  and such other  expenses as are not  specifically  assumed by the
     Funds or its Administrator as hereinafter provided.

b.   Payments to Third  Parties.  The  Administrator  shall be  responsible  for
     paying all administrative services fees payable to financial intermediaries
     pursuant to contractual  arrangements  entered into by Administrator and/or
     Distributor for the provision of shareholder and administrative services to
     beneficial owners of Fund shares. The Funds, through the Distributor or the
     Administrator,  as paying agent,  shall be responsible for paying all 12b-1
     fees  payable  to   financial   intermediaries   pursuant  to   contractual
     arrangements  entered into by Distributor for the  distribution and sale of
     Advisor Class shares.

c.   Fund Expenses.  The parties  acknowledge that the Distributor  shall not be
     liable for any fees or expenses  incurred in (a) the preparation of audited
     financial  statements  for the Fund;  (b) the  preparation  and printing of
     post-effective  amendments,  supplements and revisions of its  registration
     statements and prospectuses; (c) the preparation, printing and distributing
     to its shareholders copies of any prospectus; (d) the preparation, printing
     and  distributing  to its  shareholders  of  shareholder  reports and other
     shareholder communications; (e) the registration of the Fund and its shares
     with the Securities and Exchange  Commission;  and (f) the qualification of
     the Fund and its shares in each state in which its shares will be qualified
     for sale.  Nothing contained herein shall be deemed to require the Funds to
     pay any of the costs of advertising the sale of Fund shares.


Section 4.        Independent Contractor

Distributor shall be an independent  contractor.  Neither Distributor nor any of
its officers,  trustees, employees or representatives is or shall be an employee
of a Fund in connection with the performance of Distributor's  duties hereunder.
Distributor  shall  be  responsible  for its  own  conduct  and the  employment,
control,  compensation  and  conduct of its agents  and  employees,  and for any
injury  to such  agents  or  employees  or to  others  through  its  agents  and
employees.  Any obligations of Distributor  hereunder may be performed by one or
more affiliates of Distributor.


Section 5.        Affiliation with the Funds

Subject to and in accordance with each Fund's formative documents, Section 10 of
the 1940 Act, it is understood: that the directors,  trustees,  officers, agents
and  shareholders  of the  Funds  are or may be  interested  in  Distributor  as
directors,  officers, or shareholders of Distributor; that directors,  officers,
agents or  shareholders  of Distributor are or may be interested in the Funds as
directors,   trustees,  officers,   shareholders  (directly  or  indirectly)  or
otherwise;  and that the affect of any such  interest  shall be  governed by the
1940 Act and Section 4.


Section 6.        Books and Records

It is expressly  understood  and agreed that all  documents,  reports,  records,
books, files and other materials ("Fund Records") relating to this Agreement and
the services to be performed  hereunder  shall be the sole property of the Funds
and that such  property,  to the extent  held by  Distributor,  shall be held by
Distributor  as agent  during the  effective  term of this  Agreement.  All Fund
Records shall be delivered to the applicable  Fund upon the  termination of this
Agreement, free from any claim or retention of rights by Distributor.


Section 7.    Indemnification

a.   The  parties  acknowledge  that the  obligations  of the  Funds to take any
     action or perform any duties under this  Agreement  have been  delegated to
     the Administrator  pursuant to the terms of a Management Agreement and that
     the liability  for breach or  nonperformance  under this  Agreement and all
     indemnification  obligations for damages shall be governed under the Master
     Consulting Agreement between Distributor and Administrator.

b.   The  Distributor  agrees  to  indemnify,  defend  and hold each  Fund,  its
     directors,  trustees and officers and any person who controls Each Fund, if
     any,  within the meaning of Section 15 of the 1933 Act,  free and  harmless
     from and against  any and all claims,  demands,  liabilities  and  expenses
     (including  the cost of  investigating  or  defending  against such claims,
     demands  or  liabilities  and  any  counsel  fees  incurred  in  connection
     therewith) which each Fund, its directors, trustees or officers of any such
     controlling  person  may incur  under the 1933 Act or under  common  law or
     otherwise,  but only to the extent that such liability or expense  incurred
     by each Fund,  its  directors,  trustees or  officers  or such  controlling
     person resulting from such claims or demands shall arise out of or be based
     upon  any  alleged  untrue  statement  of  a  material  fact  contained  in
     information furnished in writing by the Distributor to each Fund for use in
     the preparation of the registration  statement or prospectus or shall arise
     out of or be based upon any alleged  omission  to state a material  fact in
     such  information  or  a  fact  necessary  to  make  such  information  not
     misleading,  it  being  understood  that  each  Fund  will  rely  upon  the
     information  provided by the  Distributor for use in the preparation of the
     registration  statement  and  prospectus.  The  Distributor's  agreement to
     indemnify  each Fund, its  directors,  trustees and officers,  and any such
     controlling   person  as  aforesaid  is  expressly   conditioned  upon  the
     Distributor's  being promptly  notified of any action brought  against each
     Fund, its directors,  trustees or officers or any such controlling  person,
     such notification to be given to the Distributor in accordance with Section
     11.


Section 8.    Limitation of Liability

The  Distributor  shall not be liable for any error of  judgment or for any loss
suffered by each Fund in  connection  with the  matters to which this  Agreement
relates,  except a loss resulting from willful  misfeasance,  bad faith or gross
negligence  on  its  part  in the  performance  of its  duties  or for  reckless
disregard by it of its obligations and duties under this Agreement.


Section 9.    Compliance with Securities Laws

Each Fund represents that it is registered as an open-end management  investment
company  under the 1940 Act, and agrees that it will comply with the  provisions
of the 1940 Act and of the rules and regulations  thereunder.  Each Fund and the
Distributor each agree to comply with the applicable terms and provisions of the
1940  Act,  the  1933  Act and,  subject  to the  provisions  of  Section  1(f),
applicable  state  securities  laws. The  Distributor  agrees to comply with the
applicable terms and provisions of the Securities Exchange Act of 1934.


Section 10.   Confidentiality

The  Distributor  agrees  on  behalf  of  itself  and  its  employees  to  treat
confidentially and as proprietary information of each Fund all records and other
information  not  otherwise  publicly  available  relative  to each Fund and its
prior,  present  or  potential  shareholders  and not to use  such  records  and
information for any purpose other than performance of its  responsibilities  and
duties hereunder,  except after prior notification to and approval in writing by
each Fund or the Fund's Administrator,  which approval shall not be unreasonably
withheld and may not be withheld where the Distributor  reasonably believes that
the  disclosure  is  necessary to avoid  exposure to civil or criminal  contempt
proceedings for failure to comply, when requested to divulge such information by
duly constituted authorities, or when so requested by each Fund.


Section 11.   Notices

Any notice  required to be given pursuant to this Agreement shall be deemed duly
given if delivered or mailed by registered  mail,  postage  prepaid:  (1) to the
Distributor at Funds  Distributor,  Inc., 60 State Street,  13th Floor,  Boston,
Massachusetts 02109, Attention: President with a copy to General Counsel; or (2)
to the Fund at its address as set forth in its Prospectuses,  Attention: General
Counsel,  or at such other address as either party may from time to time specify
to the other party pursuant to this Section 11.


Section 12.       Services Not Exclusive

The  services  of  Distributor  to the  Funds  hereunder  are  not to be  deemed
exclusive, and Distributor shall be free to render similar services to others.


Section 13.       Renewal and Termination

a.   Term and Annual Renewal.  The term of this Agreement shall be from the date
     of its approval by the vote of a majority of the Board of each Issuer,  and
     it shall  continue in effect from year to year  thereafter  only so long as
     such continuance is specifically  approved at least annually by the vote of
     a   majority   of  its  Board,   and  the  vote  of  a  majority   of  said
     directors/trustees  who are neither parties to the Agreement nor interested
     persons of any such  party,  cast at a meeting  called  for the  purpose of
     voting on such approval.  "Approved at least  annually" shall mean approval
     occurring,  with respect to the first continuance of the Agreement,  during
     the 90 days  prior  to and  including  the date of its  termination  in the
     absence of such approval,  and with respect to any subsequent  continuance,
     during the 90 days prior to and including the first anniversary of the date
     upon which the most recent  previous  annual  continuance  of the Agreement
     became effective.  The effective date of the Agreement with respect to each
     Fund is identified in the Schedules attached to this Agreement.

b.   Termination.  This Agreement may be terminated at any time, without payment
     of any  penalty,  by a  Fund's  Board,  upon 60  days'  written  notice  to
     Distributor,  and by Distributor  upon 60 days' written notice to the Fund.
     This  Agreement  shall  terminate   automatically   in  the  event  of  its
     assignment. The term "assignment" shall have the meaning set forth for such
     term in Section 2(a)(4) of the 1940 Act.


Section 14.       Severability

If any  provision  of this  Agreement  shall be held or made  invalid by a court
decision,  statute,  rule or similar authority,  the remainder of this Agreement
shall not be affected thereby.


Section 15.       Applicable Law

This  Agreement  shall be construed in accordance  with the laws of the State of
Missouri.


Section 16.       Amendment

This  Agreement  and the  Schedules  forming a part hereof may be amended at any
time by a writing  signed by each of the parties  hereto.  In the event that the
Board or trustees of any additional funds indicate by resolution that such funds
are to be made parties to this  Agreement,  whether such funds were in existence
at the time of the  effective  date of this  Agreement or  subsequently  formed,
SCHEDULE A hereto shall be amended to reflect the addition of such new funds and
such new funds shall  thereafter  become parties hereto.  In the event that such
new  funds  issue  multiple  classes  of  shares,  SCHEDULES  B, C, D, and E, as
appropriate,  shall be  amended  to  reflect  the  addition  of such new  funds'
classes.  In the event that any of the Funds listed on SCHEDULE A terminates its
registration as a management investment company, or otherwise ceases operations,
SCHEDULE A (and, as  appropriate,  SCHEDULES B, C, D, and E) shall be amended to
reflect the deletion of such Fund and its various classes.

                     FUNDS DISTRIBUTOR, INC.


                     By:/s/ Marie E. Connolly
                           Marie E. Connolly
                           President

                     AMERICAN CENTURY CALIFORNIA TAX-FREE AND MUNICIPAL FUNDS
                     AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
                     AMERICAN CENTURY GOVERNMENT INCOME TRUST
                     AMERICAN CENTURY INTERNATIONAL BOND FUNDS
                     AMERICAN CENTURY INVESTMENT TRUST
                     AMERICAN CENTURY MUNICIPAL TRUST
                     AMERICAN CENTURY MUTUAL FUNDS, INC.
                     AMERICAN CENTURY PREMIUM RESERVES, INC.
                     AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
                     AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
                     AMERICAN CENTURY TARGET MATURITIES TRUST
                     AMERICAN CENTURY VARIABLE PORTFOLIOS, INC.
                     AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.


                     By:/s/ William M. Lyons
                           William M. Lyons
                           Executive Vice President of each of the Issuers
<PAGE>
                                   SCHEDULE A

           Companies and Funds Covered by this Distribution Agreement

FUND                                                          DATE OF AGREEMENT
- --------------------------------------------------------------------------------

AMERICAN CENTURY CALIFORNIA TAX-FREE AND MUNICIPAL FUNDS
      Benham California Municipal Money Market Fund           January 15, 1998
      Benham California High-Yield Municipal Fund             January 15, 1998
      Benham California Tax-Free Money Market Fund            January 15, 1998
      Benham California Limited Term Tax-Free Fund            January 15, 1998
      Benham California Intermediate-Term Tax-Free Fund       January 15, 1998
      Benham California Long-Term Tax-Free Fund               January 15, 1998
      Benham California Insured Tax-Free Fund                 January 15, 1998

AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
      American Century Equity Income Fund                     January 15, 1998
      American Century Real Estate Fund                       January 15, 1998
      American Century Value Fund                             January 15, 1998

AMERICAN CENTURY GOVERNMENT INCOME TRUST
      Benham Short-Term Treasury Fund                         January 15, 1998
      Benham Intermediate-Term Treasury Fund                  January 15, 1998
      Benham Long-Term Treasury Fund                          January 15, 1998
      Benham Government Agency Money Market Fund              January 15, 1998
      Benham Short-Term Government Fund                       January 15, 1998
      Benham GNMA Fund                                        January 15, 1998
      Benham Inflation-Adjusted Treasury Fund                 January 15, 1998
      Benham Capital Preservation Fund                        January 15, 1998

AMERICAN CENTURY INTERNATIONAL BOND FUNDS
      Benham International Bond Fund                          January 15, 1998

AMERICAN CENTURY INVESTMENT TRUST
      Benham Prime Money Market Fund                          January 15, 1998

AMERICAN CENTURY MUNICIPAL TRUST
      Benham Arizona Intermediate-Term Municipal Fund         January 15, 1998 
      Benham Florida Municipal Money Market Fund              January 15, 1998 
      Benham Florida Intermediate-Term Municipal Fund         January 15, 1998 
      Benham Tax-Free Money Market Fund                       January 15, 1998 
      Benham Intermediate-Term Tax-Free Fund                  January 15, 1998 
      Benham Long-Term Tax-Free Fund                          January 15, 1998 
      Benham Limited-Term Tax-Free Fund                       January 15, 1998

AMERICAN CENTURY MUTUAL FUNDS, INC.
      American Century Balanced Fund                          January 15, 1998
      Benham Cash Reserve Fund                                January 15, 1998
      Twentieth Century Growth Fund                           January 15, 1998
      Twentieth Century Heritage Fund                         January 15, 1998
      Benham Intermediate-Term Bond Fund                      January 15, 1998
      Benham Limited-Term Bond Fund                           January 15, 1998
      Benham Bond Fund                                        January 15, 1998
      Twentieth Century Select Fund                           January 15, 1998
      Benham Intermediate-Term Government Fund                January 15, 1998
      Benham Short-Term Government Fund                       January 15, 1998
      Twentieth Century Ultra Fund                            January 15, 1998
      Twentieth Century Vista Fund                            January 15, 1998
      Twentieth Century Giftrust                              January 15, 1998
      Twentieth Century New Opportunities Fund                January 15, 1998

AMERICAN CENTURY PREMIUM RESERVES, INC.
      Benham Premium Government Reserve Fund                  January 15, 1998
      Benham Premium Capital Reserve Fund                     January 15, 1998
      Benham Premium Managed Bond Fund                        January 15, 1998

AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
      American Century Equity Growth Fund                     January 15, 1998
      American Century Income & Growth Fund                   January 15, 1998
      American Century Global Gold Fund                       January 15, 1998
      American Century Global Natural Resources Fund          January 15, 1998
      American Century Utilities Fund                         January 15, 1998

AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
      American Century Strategic Allocation: Aggressive       January 15, 1998
      American Century Strategic Allocation: Conservative     January 15, 1998
      American Century Strategic Allocation: Moderate         January 15, 1998

AMERICAN CENTURY TARGET MATURITIES TRUST
      Benham Target Maturities Trust:  2000                   January 15, 1998
      Benham Target Maturities Trust:  2005                   January 15, 1998
      Benham Target Maturities Trust:  2010                   January 15, 1998
      Benham Target Maturities Trust:  2015                   January 15, 1998
      Benham Target Maturities Trust:  2020                   January 15, 1998
      Benham Target Maturities Trust:  2025                   January 15, 1998

AMERICAN CENTURY VARIABLE PORTFOLIOS, INC.
      American Century VP Advantage                           January 15, 1998
      American Century VP Balanced                            January 15, 1998
      American Century VP Capital Appreciation                January 15, 1998
      American Century VP International                       January 15, 1998
      American Century VP Income & Growth                     January 15, 1998
      American Century VP Value                               January 15, 1998

AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
      Twentieth Century Emerging Markets Fund                 January 15, 1998
      Twentieth Century International Growth Fund             January 15, 1998
      Twentieth Century International Discovery Fund          January 15, 1998
<PAGE>






                                   SCHEDULE B

                      Investor Class and Single Class Funds

FUND                                                          DATE OF AGREEMENT
- --------------------------------------------------------------------------------

AMERICAN CENTURY CALIFORNIA TAX-FREE AND MUNICIPAL FUNDS
      Benham California Municipal Money Market Fund           January 15, 1998
      Benham California High-Yield Municipal Fund             January 15, 1998
      Benham California Tax-Free Money Market Fund            January 15, 1998
      Benham California Limited Term Tax-Free Fund            January 15, 1998
      Benham California Intermediate-Term Tax-Free Fund       January 15, 1998
      Benham California Long-Term Tax-Free Fund               January 15, 1998
      Benham California Insured Tax-Free Fund                 January 15, 1998

AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
      American Century Equity Income Fund(1)                  January 15, 1998
      American Century Real Estate Fund                       January 15, 1998
      American Century Value Fund(2)                          January 15, 1998

AMERICAN CENTURY GOVERNMENT INCOME TRUST
      Benham Short-Term Treasury Fund                         January 15, 1998
      Benham Intermediate-Term Treasury Fund                  January 15, 1998
      Benham Long-Term Treasury Fund                          January 15, 1998
      Benham Government Agency Money Market Fund              January 15, 1998
      Benham Short-Term Government Fund                       January 15, 1998
      Benham GNMA Fund                                        January 15, 1998
      Benham Inflation-Adjusted Treasury Fund                 January 15, 1998
      Benham Capital Preservation Fund                        January 15, 1998

AMERICAN CENTURY INTERNATIONAL BOND FUNDS
      Benham International Bond Fund                          January 15, 1998

AMERICAN CENTURY INVESTMENT TRUST
      Benham Prime Money Market Fund                          January 15, 1998

AMERICAN CENTURY MUNICIPAL TRUST
      Benham Arizona Intermediate-Term Municipal Fund         January 15, 1998 
      Benham Florida Municipal Money Market Fund              January 15, 1998 
      Benham Florida Intermediate-Term Municipal Fund         January 15, 1998 
      Benham Tax-Free Money Market Fund                       January 15, 1998  
      Benham Intermediate-Term Tax-Free Fund                  January 15, 1998 
      Benham Long-Term Tax-Free Fund                          January 15, 1998 
      Benham Limited-Term Tax-Free Fund                       January 15, 1998

AMERICAN CENTURY MUTUAL FUNDS, INC.
      American Century Balanced Fund(2)                       January 15, 1998
      Benham Cash Reserve Fund(2)                             January 15, 1998
      Twentieth Century Growth Fund(2)                        January 15, 1998
      Twentieth Century Heritage Fund(2)                      January 15, 1998
      Benham Intermediate-Term Bond Fund(2)                   January 15, 1998
      Benham Limited-Term Bond Fund(2)                        January 15, 1998
      Benham Bond Fund(2)                                     January 15, 1998
      Twentieth Century Select Fund(2)                        January 15, 1998
      Benham Intermediate-Term Government Fund(2)             January 15, 1998
      Benham Short-Term Government Fund(2)                    January 15, 1998
      Twentieth Century Ultra Fund(2)                         January 15, 1998
      Twentieth Century Vista Fund(2)                         January 15, 1998
      Twentieth Century Giftrust(1)                           January 15, 1998
      Twentieth Century New Opportunities Fund(1)             January 15, 1998

AMERICAN CENTURY PREMIUM RESERVES, INC.
      Benham Premium Government Reserve Fund(1)               January 15, 1998
      Benham Premium Capital Reserve Fund(1)                  January 15, 1998
      Benham Premium Bond Fund(1)                             January 15, 1998

AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
      American Century Equity Growth Fund                     January 15, 1998
      American Century Income & Growth Fund                   January 15, 1998
      American Century Global Gold Fund                       January 15, 1998
      American Century Global Natural Resources Fund          January 15, 1998
      American Century Utilities Fund                         January 15, 1998

AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
      American Century Strategic Allocation: Aggressive(2)    January 15, 1998
      American Century Strategic Allocation: Conservative(2)  January 15, 1998
      American Century Strategic Allocation: Moderate(2)      January 15, 1998

AMERICAN CENTURY TARGET MATURITIES TRUST
      Benham Target Maturities Trust:  2000                   January 15, 1998
      Benham Target Maturities Trust:  2005                   January 15, 1998
      Benham Target Maturities Trust:  2010                   January 15, 1998
      Benham Target Maturities Trust:  2015                   January 15, 1998
      Benham Target Maturities Trust:  2020                   January 15, 1998
      Benham Target Maturities Trust:  2025                   January 15, 1998

AMERICAN CENTURY VARIABLE PORTFOLIOS, INC.
      American Century VP Advantage(2)                        January 15, 1998
      American Century VP Balanced(1)                         January 15, 1998
      American Century VP Capital Appreciation(1)             January 15, 1998
      American Century VP International(1)                    January 15, 1998
      American Century VP Income & Growth                     January 15, 1998
      American Century VP Value(1)                            January 15, 1998

AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
      Twentieth Century Emerging Markets Fund(2)              January 15, 1998
      Twentieth Century International Growth Fund(2)          January 15, 1998
      Twentieth Century International Discovery Fund(2)       January 15, 1998

- --------
1  Multiple Classes of Shares
2  Single Class of Shares
<PAGE>
                                   SCHEDULE C

                            Institutional Class Funds

FUND                                                          DATE OF AGREEMENT
- --------------------------------------------------------------------------------

AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
      American Century Equity Income Fund                     January 15, 1998
      American Century Real Estate Fund                       January 15, 1998
      American Century Value Fund                             January 15, 1998

AMERICAN CENTURY MUTUAL FUNDS, INC.
      American Century Balanced Fund                          January 15, 1998
      Twentieth Century Growth Fund                           January 15, 1998
      Twentieth Century Heritage Fund                         January 15, 1998
      Twentieth Century Select Fund                           January 15, 1998
      Twentieth Century Ultra Fund                            January 15, 1998
      Twentieth Century Vista Fund                            January 15, 1998

AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
      American Century Equity Growth Fund                     January 15, 1998
      American Century Income & Growth Fund                   January 15, 1998

AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
      Twentieth Century Emerging Markets Fund                 January 15, 1998
      Twentieth Century International Growth Fund             January 15, 1998
      Twentieth Century International Discovery Fund          January 15, 1998
<PAGE>
                                   SCHEDULE D

                               Service Class Funds

FUND                                                          DATE OF AGREEMENT
- --------------------------------------------------------------------------------

AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
      American Century Equity Income Fund                     January 15, 1998
      American Century Real Estate Fund                       January 15, 1998
      American Century Value Fund                             January 15, 1998

AMERICAN CENTURY MUTUAL FUNDS, INC.
      American Century Balanced Fund                          January 15, 1998
      Benham Cash Reserve Fund                                January 15, 1998
      Twentieth Century Growth Fund                           January 15, 1998
      Twentieth Century Heritage Fund                         January 15, 1998
      Benham Intermediate-Term Bond Fund                      January 15, 1998
      Benham Limited-Term Bond Fund                           January 15, 1998
      Benham Bond Fund                                        January 15, 1998
      Twentieth Century Select Fund                           January 15, 1998
      Benham Intermediate-Term Government Fund                January 15, 1998
      Benham Short-Term Government Fund                       January 15, 1998
      Twentieth Century Ultra Fund                            January 15, 1998
      Twentieth Century Vista Fund                            January 15, 1998

AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
      American Century Strategic Allocation: Aggressive       January 15, 1998
      American Century Strategic Allocation: Conservative     January 15, 1998
      American Century Strategic Allocation: Moderate         January 15, 1998

AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
      Twentieth Century Emerging Markets Fund                 January 15, 1998
      Twentieth Century International Growth Fund             January 15, 1998
      Twentieth Century International Discovery Fund          January 15, 1998
<PAGE>
                                   SCHEDULE E

                               Advisor Class Funds

FUND                                                          DATE OF AGREEMENT
- --------------------------------------------------------------------------------

AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
      American Century Equity Income Fund                     January 15, 1998
      American Century Value Fund                             January 15, 1998

AMERICAN CENTURY GOVERNMENT INCOME TRUST
      Benham Short-Term Treasury Fund                         January 15, 1998
      Benham Intermediate-Term Treasury Fund                  January 15, 1998
      Benham Long-Term Treasury Fund                          January 15, 1998
      Benham Government Agency Money Market Fund              January 15, 1998
      Benham Short-Term Government Fund                       January 15, 1998
      Benham GNMA Fund                                        January 15, 1998
      Benham Inflation-Adjusted Treasury Fund                 January 15, 1998

AMERICAN CENTURY INTERNATIONAL BOND FUNDS
      Benham International Bond Fund                          January 15, 1998

AMERICAN CENTURY MUTUAL FUNDS, INC.
      American Century Balanced Fund                          January 15, 1998
      Benham Cash Reserve Fund                                January 15, 1998
      Twentieth Century Growth Fund                           January 15, 1998
      Twentieth Century Heritage Fund                         January 15, 1998
      Benham Intermediate-Term Bond Fund                      January 15, 1998
      Benham Limited-Term Bond Fund                           January 15, 1998
      Benham Bond Fund                                        January 15, 1998
      Twentieth Century Select Fund                           January 15, 1998
      Benham Intermediate-Term Government Fund                January 15, 1998
      Benham Short-Term Government Fund                       January 15, 1998
      Twentieth Century Ultra Fund                            January 15, 1998
      Twentieth Century Vista Fund                            January 15, 1998

AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
      American Century Equity Growth Fund                     January 15, 1998
      American Century Income & Growth Fund                   January 15, 1998
      American Century Global Gold Fund                       January 15, 1998
      American Century Global Natural Resources Fund          January 15, 1998
      American Century Utilities Fund                         January 15, 1998

AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
      American Century Strategic Allocation: Aggressive       January 15, 1998
      American CenturyStrategic Allocation: Conservative      January 15, 1998
      American Century Strategic Allocation: Moderate         January 15, 1998

AMERICAN CENTURY TARGET MATURITIES TRUST
      Benham Target Maturities Trust:  2000                   January 15, 1998
      Benham Target Maturities Trust:  2005                   January 15, 1998
      Benham Target Maturities Trust:  2010                   January 15, 1998
      Benham Target Maturities Trust:  2015                   January 15, 1998
      Benham Target Maturities Trust:  2020                   January 15, 1998
      Benham Target Maturities Trust:  2025                   January 15, 1998

AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
      Twentieth Century Emerging Markets Fund                 January 15, 1998
      Twentieth Century International Growth Fund             January 15, 1998
      Twentieth Century International Discovery Fund          January 15, 1998

                         CONSENT OF INDEPENDENT AUDITORS


The Board of Trustees and Shareholders
American Century Target Maturities Trust:

We consent to the  inclusion  in  American  Century  Target  Maturities  Trust's
Post-Effective  Amendment No. 28 to the  Registration  Statement No.  2-94608 on
Form  N-1A  under  the  Securities  Act of  1933  and  Amendment  No.  30 to the
Registration  Statement  No.  811-4165  filed on Form N-1A under the  Investment
Company  Act of 1940 of our  reports  dated  November  3, 1997 on the  financial
statements  and  financial  highlights  of the  American  Century-Benham  Target
Maturities Trust: 2000, American  Century-Benham  Target Maturities Trust: 2005,
American  Century-Benham Target Maturities Trust: 2010, American  Century-Benham
Target Maturities Trust: 2015, American  Century-Benham Target Maturities Trust:
2020 and American  Century-Benham  Target Maturities Trust: 2025 for the periods
indicated  therein,  which reports have been  incorporated by reference into the
Statement of Additional Information of American Century Target Maturities Trust.
We also  consent  to the  reference  to our firm  under the  heading  "Financial
Highlights"  in the  Prospectus  and under the heading  "About the Trust" in the
Statement of Additional  Information which is incorporated by reference into the
Prospectus.


/s/KPMG Peat Marwick LLP

Kansas City, Missouri
January 27, 1998

                    AMERICAN CENTURY-BENHAM TARGET 2000 FUND
                                YIELD CALCULATION
                                    9/30/97

                       Formula: YIELD = 2[(A-B/C*D+1)^6-1]

              A     = Investment income earned during the period
              B     = Expenses accrued for the period (net of reimbursements)
              C     = The average daily number of shares outstanding during the 
                      period that were entitled to receive dividends
              D     = The per share price on the last day of the period



              A     =             $1,280,762.06
              B     =               $124,033.18
              C     =              2,963,313.402
              D     =                    $86.06

        Yield       =                      5.51%
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2000 FUND
                           AVERAGE ANNUAL TOTAL RETURN
                                     9/30/97

                            Formula: T=(ERV/P)^1/N -1

                 P     =   A hypothetical initial payment of $1,000
                 ERV   =   Ending redeemable value of a hypothetical 
                           $1,000 payment made at the beginning of the period
                 N     =   Number of years
                 T     =   Average annual total return

                         P                 ERV          N                T
                 -----------------------------------------------------------

One Year             $1,000.00         $1,076.40         1.000000      7.64%

Five Year            $1,000.00         $1,384.50         5.000000      6.72%

Ten Year             $1,000.00         $2,952.30        10.000000     11.43%

Inception *          $1,000.00         $4,411.10        12.518482     12.59%

TR = Total return for period           TR=(ERV/P)-1       341.11%

*Date of Inception:                        3/25/85
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2005 FUND
                                YIELD CALCULATION
                                    9/30/97

                       Formula: YIELD = 2[(A-B/C*D+1)^6-1]

              A     = Investment income earned during the period
              B     = Expenses accrued for the period (net of reimbursements)
              C     = The average daily number of shares outstanding during the 
                      period that were entitled to receive dividends
              D     = The per share price on the last day of the period



              A     =             $1,479,049.20
              B     =               $135,376.81
              C     =              4,346,164.323
              D     =                    $64.54

        Yield       =                      5.82%
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2005 FUND
                           AVERAGE ANNUAL TOTAL RETURN
                                     9/30/97

                            Formula: T=(ERV/P)^1/N -1

                 P     =   A hypothetical initial payment of $1,000
                 ERV   =   Ending redeemable value of a hypothetical $1,000 
                           payment made at the beginning of the period
                 N     =   Number of years
                 T     =   Average annual total return

                         P                 ERV            N                T
                 ------------------------------------------------------------

One Year             $1,000.00         $1,116.00           1.000000     11.60%

Five Year            $1,000.00         $1,567.30           5.000000      9.40%

Ten Year             $1,000.00         $3,599.60          10.000000     13.66%

Inception *          $1,000.00         $5,432.70          12.518482     14.48%

TR = Total return for period           TR=(ERV/P)-1         443.27%

*Date of Inception:                        3/25/85
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2010 FUND
                                YIELD CALCULATION
                                    9/30/97

                       Formula: YIELD = 2[(A-B/C*D+1)^6-1]

              A     = Investment income earned during the period
              B     = Expenses accrued for the period (net of reimbursements)
              C     = The average daily number of shares outstanding during the 
                      period that were entitled to receive dividends
              D     = The per share price on the last day of the period



              A     =               $677,863.50
              B     =                $59,935.55
              C     =              2,536,444.478
              D     =                    $49.16

        Yield       =                      6.02%
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2010 FUND
                           AVERAGE ANNUAL TOTAL RETURN
                                     9/30/97

                            Formula: T=(ERV/P)^1/N -1

                 P     =   A hypothetical initial payment of $1,000
                 ERV   =   Ending redeemable value of a hypothetical $1,000 
                           payment made at the beginning of the period
                 N     =   Number of years
                 T     =   Average annual total return

                         P                 ERV          N                T
                 ----------------------------------------------------------

One Year             $1,000.00         $1,157.50         1.000000     15.75%

Five Year            $1,000.00         $1,723.10         5.000000     11.50%

Ten Year             $1,000.00         $4,079.70        10.000000     15.10%

Inception *          $1,000.00         $6,270.40        12.518482     15.79%

TR = Total return for period          TR=(ERV/P)-1        527.04%

*Date of Inception:                        3/25/85
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2015 FUND
                                YIELD CALCULATION
                                    9/30/97

                       Formula: YIELD = 2[(A-B/C*D+1)^6-1]

              A     = Investment income earned during the period
              B     = Expenses accrued for the period (net of reimbursements)
              C     = The average daily number of shares outstanding during the 
                      period that were entitled to receive dividends
              D     = The per share price on the last day of the period



              A     =               $629,459.32
              B     =                $54,609.12
              C     =              2,979,342.554
              D     =                    $38.34

        Yield       =                      6.12%
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2015 FUND
                           AVERAGE ANNUAL TOTAL RETURN
                                     9/30/97

                            Formula: T=(ERV/P)^1/N -1

                 P     =   A hypothetical initial payment of $1,000
                 ERV   =   Ending redeemable value of a hypothetical $1,000 
                           payment made at the beginning of the period
                 N     =   Number of years
                 T     =   Average annual total return

                     P                 ERV             N           T
                 ------------------------------------------------------

One Year         $1,000.00         $1,199.60        1.000000     19.96%

Five Year        $1,000.00         $1,880.30        5.000000     13.46%

Ten Year         $1,000.00         $4,245.80       10.000000     15.56%

Inception *      $1,000.00         $3,047.70       11.066393     10.59%

TR = Total return for period      TR=(ERV/P)-1       204.77%

*Date of Inception:                        9/1/86
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2020 FUND
                                YIELD CALCULATION
                                    9/30/97

                       Formula: YIELD = 2[(A-B/C*D+1)^6-1]

              A     = Investment income earned during the period
              B     = Expenses accrued for the period (net of reimbursements)
              C     = The average daily number of shares outstanding during the 
                      period that were entitled to receive dividends
              D     = The per share price on the last day of the period



              A     =             $3,165,199.86
              B     =               $270,874.64
              C     =             20,922,218.317
              D     =                    $27.17

        Yield       =                      6.19%
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2020 FUND
                           AVERAGE ANNUAL TOTAL RETURN
                                     9/30/97

                            Formula: T=(ERV/P)^1/N -1

                 P     =   A hypothetical initial payment of $1,000
                 ERV   =   Ending redeemable value of a hypothetical $1,000 
                           payment made at the beginning of the period
                 N     =   Number of years
                 T     =   Average annual total return

                          P                 ERV                N         T
                  -----------------------------------------------------------

One Year              $1,000.00         $1,235.00         1.000000     23.50%

Five Year             $1,000.00         $1,993.40         5.000000     14.79%

Ten Year

Inception *           $1,000.00         $2,264.20         7.753593     11.12%

TR = Total return for period           TR=(ERV/P)-1        126.42%

*Date of Inception:                       12/29/89
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2025 FUND
                                YIELD CALCULATION
                                    9/30/97

                       Formula: YIELD = 2[(A-B/C*D+1)^6-1]

              A     = Investment income earned during the period
              B     = Expenses accrued for the period (net of reimbursements)
              C     = The average daily number of shares outstanding during the 
                      period that were entitled to receive dividends
              D     = The per share price on the last day of the period



              A     =               $382,931.19
              B     =                $33,786.29
              C     =              3,176,031.201
              D     =                    $22.27

        Yield       =                      6.00%
<PAGE>
                    AMERICAN CENTURY-BENHAM TARGET 2025 FUND
                           AVERAGE ANNUAL TOTAL RETURN
                                     9/30/97

                            Formula: T=(ERV/P)^1/N -1

                 P     =   A hypothetical initial payment of $1,000
                 ERV   =   Ending redeemable value of a hypothetical $1,000 
                           payment made at the beginning of the period
                 N     =   Number of years
                 T     =   Average annual total return

                        P                 ERV             N           T
                 ---------------------------------------------------------

One Year             $1,000.00         $1,243.40       1.000000     24.34%

Five Year

Ten Year

Inception *          $1,000.00         $1,121.90       1.622435      7.35%

TR = Total return for period          TR=(ERV/P)-1       12.19%

*Date of Inception:                        2/15/96

                               POWER OF ATTORNEY


KNOW ALL MEN BY THESE PRESENTS,  that the  undersigned,  AMERICAN CENTURY TARGET
MATURITIES  TRUST,  hereinafter  called the  "Trust" and  certain  trustees  and
officers of the Trust, do hereby  constitute and appoint James E. Stowers,  III,
William M.  Lyons,  Douglas  A. Paul,  and  Patrick A.  Looby,  and each of them
individually,  their  true and lawful  attorneys  and agents to take any and all
action and execute any and all  instruments  which said attorneys and agents may
deem  necessary or  advisable to enable the Trust to comply with the  Securities
Act of 1933 and/or the Investment Company Act of 1940, as amended, and any rules
regulations,  orders, or other  requirements of the United States Securities and
Exchange  Commission  thereunder,  in connection with the registration under the
Securities  Act of 1933 and/or the  Investment  Company Act of 1940, as amended,
including  specifically,  but without  limitation  of the  foregoing,  power and
authority to sign the name of the Trust in its behalf and to affix its seal, and
to sign the names of each of such  trustees and officers in their  capacities as
indicated,  to any amendment or supplement to the  Registration  Statement filed
with the  Securities  and Exchange  Commission  under the Securities Act of 1933
and/or the Investment Company Act of 1940, as amended, and to any instruments or
documents  filed  or to be  filed  as a  part  of or  in  connection  with  such
Registration  Statement;  the  Registration  Statement  on  Form  N-14  and  any
amendments or  supplements  thereto to be filed with the Securities and Exchange
Commission under the Securities Act of 1933 and/or the Investment Company Act of
1940, as amended,  and to any  instruments or documents  filed or to be filed as
part of or in  connection  with  such  Registration  Statement;  and each of the
undersigned  hereby  ratifies and confirms  all that said  attorneys  and agents
shall do or cause to be done by virtue hereof.

IN WITNESS  WHEREOF,  the Trust has caused this Power to be executed by its duly
authorized officers on this the 15th day of January, 1998.


                                AMERICAN CENTURY TARGET MATURITIES TRUST
                                (A Massachusetts Business Trust)

                                 By:/*/Richard W. Ingram
                                    Richard W. Ingram, President


                              SIGNATURE AND TITLE

/*/James E. Stowers, III                          /*/Isaac Stein
James E. Stowers, III                             Isaac Stein
Chairman                                          Director

/*/Albert A. Eisenstat                            /*/Jeanne D. Wohlers
Albert A. Eisenstat                               Jeanne D. Wohlers
Director                                          Director

/*/Ronald J. Gilson                               /*/William M. Lyons
Ronald J. Gilson                                  William M. Lyons
Director                                          Director

/*/Myron S. Scholes                               /*/Maryanne Roepke
Myron S. Scholes                                  Maryanne Roepke
Director                                          Treasurer      

/*/Kenneth E. Scott
Kenneth E. Scott
Director                                        Attest:

                                                By:/*/Douglas A. Paul, Secretary
                                                Douglas A. Paul, Secretary

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF AMERICAN  CENTURY MUTUAL FUNDS,  INC. AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH  REPORT.  INFORMATION  PRESENTED IS A TOTAL OF ALL CLASSES,
EXCEPT WHERE SUCH PRESENTATION IS NOT POSSIBLE(SUCH AS PER SHARE DATE). IN THOSE
CASES, ONLY THE INVESTOR CLASS INFORMATION IS PRESENTED.
</LEGEND>
<CIK> 0000757928
<NAME> BENHAM TARGET MATURITIES TRUST
<SERIES>
   <NUMBER> 1
   <NAME> BENHAM TARGET MATURITIES TRUST: 2000
       
<S>                                           <C>
<PERIOD-TYPE>                                YEAR
<FISCAL-YEAR-END>                            NOV-30-1997
<PERIOD-END>                                 NOV-30-1997       <F1>
<INVESTMENTS-AT-COST>                             241,245,778
<INVESTMENTS-AT-VALUE>                            248,790,140
<RECEIVABLES>                                               0
<ASSETS-OTHER>                                         73,630
<OTHER-ITEMS-ASSETS>                                        0
<TOTAL-ASSETS>                                    248,863,770
<PAYABLE-FOR-SECURITIES>                                    0
<SENIOR-LONG-TERM-DEBT>                                     0
<OTHER-ITEMS-LIABILITIES>                             486,636
<TOTAL-LIABILITIES>                                   486,636
<SENIOR-EQUITY>                                     2,886,261
<PAID-IN-CAPITAL-COMMON>                          229,292,928
<SHARES-COMMON-STOCK>                               2,886,261
<SHARES-COMMON-PRIOR>                               3,349,052
<ACCUMULATED-NII-CURRENT>                          12,055,714
<OVERDISTRIBUTION-NII>                                      0
<ACCUMULATED-NET-GAINS>                            (3,402,131)
<OVERDISTRIBUTION-GAINS>                                    0
<ACCUM-APPREC-OR-DEPREC>                            7,544,362
<NET-ASSETS>                                      248,377,134
<DIVIDEND-INCOME>                                           0
<INTEREST-INCOME>                                  17,633,883
<OTHER-INCOME>                                              0
<EXPENSES-NET>                                      1,464,338
<NET-INVESTMENT-INCOME>                            16,169,545
<REALIZED-GAINS-CURRENT>                            1,190,560
<APPREC-INCREASE-CURRENT>                           2,108,565
<NET-CHANGE-FROM-OPS>                              19,468,670
<EQUALIZATION>                                              0
<DISTRIBUTIONS-OF-INCOME>                          17,081,069
<DISTRIBUTIONS-OF-GAINS>                                    0  <F2>
<DISTRIBUTIONS-OTHER>                                       0
<NUMBER-OF-SHARES-SOLD>                               833,120
<NUMBER-OF-SHARES-REDEEMED>                         1,291,432
<SHARES-REINVESTED>                                   217,238 <F2>
<NET-CHANGE-IN-ASSETS>                            (19,379,454)
<ACCUMULATED-NII-PRIOR>                            12,967,238
<ACCUMULATED-GAINS-PRIOR>                          (4,592,691)
<OVERDISTRIB-NII-PRIOR>                                     0
<OVERDIST-NET-GAINS-PRIOR>                                  0
<GROSS-ADVISORY-FEES>                                 902,194
<INTEREST-EXPENSE>                                          0
<GROSS-EXPENSE>                                     1,464,338
<AVERAGE-NET-ASSETS>                              263,549,743
<PER-SHARE-NAV-BEGIN>                                   79.95 <F2>
<PER-SHARE-NII>                                          5.10
<PER-SHARE-GAIN-APPREC>                                  1.00
<PER-SHARE-DIVIDEND>                                     5.20
<PER-SHARE-DISTRIBUTIONS>                                0.00 <F2>
<RETURNS-OF-CAPITAL>                                     0.00
<PER-SHARE-NAV-END>                                     86.05 <F2>
<EXPENSE-RATIO>                                          0.56 <F2>
<AVG-DEBT-OUTSTANDING>                                      0
<AVG-DEBT-PER-SHARE>                                     0.00
<FN>
<F1>SCHEDULE RELFECTS THE TOTAL FOR ALL CLASSES, EXCEPT WHERE INDICATED.
<F2>INVESTOR CLASS INFORMATION ONLY.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF AMERICAN  CENTURY MUTUAL FUNDS,  INC. AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH  REPORT.  INFORMATION  PRESENTED IS A TOTAL OF ALL CLASSES,
EXCEPT WHERE SUCH PRESENTATION IS NOT POSSIBLE(SUCH AS PER SHARE DATE). IN THOSE
CASES, ONLY THE INVESTOR CLASS INFORMATION IS PRESENTED.
</LEGEND>
<CIK> 0000757928
<NAME> BENHAM TARGET MATURITIES TRUST
<SERIES>
   <NUMBER> 2
   <NAME> BENHAM TARGET MATURITIES TRUST:2005
       
<S>                                           <C>
<PERIOD-TYPE>                                YEAR
<FISCAL-YEAR-END>                            NOV-30-1997
<PERIOD-END>                                 NOV-30-1997       <F1>
<INVESTMENTS-AT-COST>                             257,998,629
<INVESTMENTS-AT-VALUE>                            276,763,314
<RECEIVABLES>                                       4,609,305
<ASSETS-OTHER>                                        686,977
<OTHER-ITEMS-ASSETS>                                        0
<TOTAL-ASSETS>                                    282,059,596
<PAYABLE-FOR-SECURITIES>                                    0
<SENIOR-LONG-TERM-DEBT>                                     0
<OTHER-ITEMS-LIABILITIES>                             382,455
<TOTAL-LIABILITIES>                                   382,455
<SENIOR-EQUITY>                                     4,364,423
<PAID-IN-CAPITAL-COMMON>                          245,940,240
<SHARES-COMMON-STOCK>                               4,364,423
<SHARES-COMMON-PRIOR>                               4,130,406
<ACCUMULATED-NII-CURRENT>                          11,708,093
<OVERDISTRIBUTION-NII>                                      0
<ACCUMULATED-NET-GAINS>                               899,700
<OVERDISTRIBUTION-GAINS>                                    0
<ACCUM-APPREC-OR-DEPREC>                           18,764,685
<NET-ASSETS>                                      281,677,141
<DIVIDEND-INCOME>                                           0
<INTEREST-INCOME>                                  16,881,275
<OTHER-INCOME>                                              0
<EXPENSES-NET>                                      1,430,252
<NET-INVESTMENT-INCOME>                            15,451,023
<REALIZED-GAINS-CURRENT>                            1,348,958
<APPREC-INCREASE-CURRENT>                          11,653,361
<NET-CHANGE-FROM-OPS>                              28,453,342
<EQUALIZATION>                                              0
<DISTRIBUTIONS-OF-INCOME>                          14,549,884
<DISTRIBUTIONS-OF-GAINS>                            1,764,760  <F2>
<DISTRIBUTIONS-OTHER>                                       0
<NUMBER-OF-SHARES-SOLD>                             1,988,109
<NUMBER-OF-SHARES-REDEEMED>                         1,748,806
<SHARES-REINVESTED>                                   282,750 <F2>
<NET-CHANGE-IN-ASSETS>                             42,813,213
<ACCUMULATED-NII-PRIOR>                            10,806,954
<ACCUMULATED-GAINS-PRIOR>                           1,315,502
<OVERDISTRIB-NII-PRIOR>                                     0
<OVERDIST-NET-GAINS-PRIOR>                                  0
<GROSS-ADVISORY-FEES>                                 875,825
<INTEREST-EXPENSE>                                          0
<GROSS-EXPENSE>                                     1,430,252
<AVERAGE-NET-ASSETS>                              251,335,237
<PER-SHARE-NAV-BEGIN>                                   57.83 <F2>
<PER-SHARE-NII>                                          3.74
<PER-SHARE-GAIN-APPREC>                                  2.97
<PER-SHARE-DIVIDEND>                                     3.61
<PER-SHARE-DISTRIBUTIONS>                                0.44 <F2>
<RETURNS-OF-CAPITAL>                                     0.00
<PER-SHARE-NAV-END>                                     64.54 <F2>
<EXPENSE-RATIO>                                          0.57 <F2>
<AVG-DEBT-OUTSTANDING>                                      0
<AVG-DEBT-PER-SHARE>                                     0.00
<FN>
<F1>SCHEDULE RELFECTS THE TOTAL FOR ALL CLASSES, EXCEPT WHERE INDICATED.
<F2>INVESTOR CLASS INFORMATION ONLY.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF AMERICAN  CENTURY MUTUAL FUNDS,  INC. AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH  REPORT.  INFORMATION  PRESENTED IS A TOTAL OF ALL CLASSES,
EXCEPT WHERE SUCH PRESENTATION IS NOT POSSIBLE(SUCH AS PER SHARE DATE). IN THOSE
CASES, ONLY THE INVESTOR CLASS INFORMATION IS PRESENTED.
</LEGEND>
<CIK> 0000757928
<NAME> BENHAM TARGET MATURITIES TRUST
<SERIES>
   <NUMBER> 3
   <NAME> BENHAM TARGET MATURITIES TRUST:2010
       
<S>                                           <C>
<PERIOD-TYPE>                                YEAR
<FISCAL-YEAR-END>                            NOV-30-1997
<PERIOD-END>                                 NOV-30-1997       <F1>
<INVESTMENTS-AT-COST>                             112,470,517
<INVESTMENTS-AT-VALUE>                            123,786,073
<RECEIVABLES>                                               0
<ASSETS-OTHER>                                      1,201,213
<OTHER-ITEMS-ASSETS>                                        0
<TOTAL-ASSETS>                                    124,987,286
<PAYABLE-FOR-SECURITIES>                                    0
<SENIOR-LONG-TERM-DEBT>                                     0
<OTHER-ITEMS-LIABILITIES>                             175,457
<TOTAL-LIABILITIES>                                   175,457
<SENIOR-EQUITY>                                     2,539,122
<PAID-IN-CAPITAL-COMMON>                          105,093,546
<SHARES-COMMON-STOCK>                               2,539,122
<SHARES-COMMON-PRIOR>                               2,616,128
<ACCUMULATED-NII-CURRENT>                           5,099,718
<OVERDISTRIBUTION-NII>                                      0
<ACCUMULATED-NET-GAINS>                               763,887
<OVERDISTRIBUTION-GAINS>                                    0
<ACCUM-APPREC-OR-DEPREC>                           11,315,556
<NET-ASSETS>                                      124,811,829
<DIVIDEND-INCOME>                                           0
<INTEREST-INCOME>                                   7,530,792
<OTHER-INCOME>                                              0
<EXPENSES-NET>                                        685,086
<NET-INVESTMENT-INCOME>                             6,845,706
<REALIZED-GAINS-CURRENT>                            1,066,854
<APPREC-INCREASE-CURRENT>                           9,112,041
<NET-CHANGE-FROM-OPS>                              17,024,601
<EQUALIZATION>                                              0
<DISTRIBUTIONS-OF-INCOME>                           6,941,406
<DISTRIBUTIONS-OF-GAINS>                            2,886,953  <F2>
<DISTRIBUTIONS-OTHER>                                       0
<NUMBER-OF-SHARES-SOLD>                             1,383,983
<NUMBER-OF-SHARES-REDEEMED>                         1,456,337
<SHARES-REINVESTED>                                   233,038 <F2>
<NET-CHANGE-IN-ASSETS>                             13,694,638
<ACCUMULATED-NII-PRIOR>                             5,195,418
<ACCUMULATED-GAINS-PRIOR>                           2,583,986
<OVERDISTRIB-NII-PRIOR>                                     0
<OVERDIST-NET-GAINS-PRIOR>                                  0
<GROSS-ADVISORY-FEES>                                 386,859
<INTEREST-EXPENSE>                                          0
<GROSS-EXPENSE>                                       691,879
<AVERAGE-NET-ASSETS>                              111,298,120
<PER-SHARE-NAV-BEGIN>                                   42.47 <F2>
<PER-SHARE-NII>                                          2.79
<PER-SHARE-GAIN-APPREC>                                  3.90
<PER-SHARE-DIVIDEND>                                     2.82
<PER-SHARE-DISTRIBUTIONS>                                1.17 <F2>
<RETURNS-OF-CAPITAL>                                     0.00
<PER-SHARE-NAV-END>                                     49.16 <F2>
<EXPENSE-RATIO>                                          0.62 <F2>
<AVG-DEBT-OUTSTANDING>                                      0
<AVG-DEBT-PER-SHARE>                                     0.00
<FN>
<F1>SCHEDULE RELFECTS THE TOTAL FOR ALL CLASSES, EXCEPT WHERE INDICATED.
<F2>INVESTOR CLASS INFORMATION ONLY.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF AMERICAN  CENTURY MUTUAL FUNDS,  INC. AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH  REPORT.  INFORMATION  PRESENTED IS A TOTAL OF ALL CLASSES,
EXCEPT WHERE SUCH PRESENTATION IS NOT POSSIBLE(SUCH AS PER SHARE DATE). IN THOSE
CASES, ONLY THE INVESTOR CLASS INFORMATION IS PRESENTED.
</LEGEND>
<CIK> 0000757928
<NAME> BENHAM TARGET MATURITIES TRUST
<SERIES>
   <NUMBER> 4
   <NAME> BENHAM TARGET MATURITIES TRUST:2015
       
<S>                                           <C>
<PERIOD-TYPE>                                YEAR
<FISCAL-YEAR-END>                            NOV-30-1997
<PERIOD-END>                                 NOV-30-1997       <F1>
<INVESTMENTS-AT-COST>                              84,422,308
<INVESTMENTS-AT-VALUE>                            114,680,001
<RECEIVABLES>                                               0
<ASSETS-OTHER>                                        401,633
<OTHER-ITEMS-ASSETS>                                        0
<TOTAL-ASSETS>                                    115,081,634
<PAYABLE-FOR-SECURITIES>                                    0
<SENIOR-LONG-TERM-DEBT>                                     0
<OTHER-ITEMS-LIABILITIES>                             182,065
<TOTAL-LIABILITIES>                                   182,065
<SENIOR-EQUITY>                                     2,996,659
<PAID-IN-CAPITAL-COMMON>                           72,477,114
<SHARES-COMMON-STOCK>                               2,996,659
<SHARES-COMMON-PRIOR>                               3,618,424
<ACCUMULATED-NII-CURRENT>                           4,945,063
<OVERDISTRIBUTION-NII>                                      0
<ACCUMULATED-NET-GAINS>                             4,223,040
<OVERDISTRIBUTION-GAINS>                                    0
<ACCUM-APPREC-OR-DEPREC>                           30,257,693
<NET-ASSETS>                                      114,899,569
<DIVIDEND-INCOME>                                           0
<INTEREST-INCOME>                                   7,293,811
<OTHER-INCOME>                                              0
<EXPENSES-NET>                                        699,022
<NET-INVESTMENT-INCOME>                             6,594,789
<REALIZED-GAINS-CURRENT>                            4,715,347
<APPREC-INCREASE-CURRENT>                          10,243,018
<NET-CHANGE-FROM-OPS>                              21,553,154
<EQUALIZATION>                                              0
<DISTRIBUTIONS-OF-INCOME>                           6,897,189
<DISTRIBUTIONS-OF-GAINS>                            1,134,946  <F2>
<DISTRIBUTIONS-OTHER>                                       0
<NUMBER-OF-SHARES-SOLD>                             1,812,323
<NUMBER-OF-SHARES-REDEEMED>                         2,427,375
<SHARES-REINVESTED>                                   241,373 <F2>
<NET-CHANGE-IN-ASSETS>                               (754,256)
<ACCUMULATED-NII-PRIOR>                             5,247,463
<ACCUMULATED-GAINS-PRIOR>                             642,639
<OVERDISTRIB-NII-PRIOR>                                     0
<OVERDIST-NET-GAINS-PRIOR>                                  0
<GROSS-ADVISORY-FEES>                                 389,958
<INTEREST-EXPENSE>                                          0
<GROSS-EXPENSE>                                       702,342
<AVERAGE-NET-ASSETS>                              113,855,918
<PER-SHARE-NAV-BEGIN>                                   31.96 <F2>
<PER-SHARE-NII>                                          2.00
<PER-SHARE-GAIN-APPREC>                                  4.38
<PER-SHARE-DIVIDEND>                                     2.05
<PER-SHARE-DISTRIBUTIONS>                                0.34 <F2>
<RETURNS-OF-CAPITAL>                                     0.00
<PER-SHARE-NAV-END>                                     38.34 <F2>
<EXPENSE-RATIO>                                          0.61 <F2>
<AVG-DEBT-OUTSTANDING>                                      0
<AVG-DEBT-PER-SHARE>                                     0.00
<FN>
<F1>SCHEDULE RELFECTS THE TOTAL FOR ALL CLASSES, EXCEPT WHERE INDICATED.
<F2>INVESTOR CLASS INFORMATION ONLY.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF AMERICAN  CENTURY MUTUAL FUNDS,  INC. AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH  REPORT.  INFORMATION  PRESENTED IS A TOTAL OF ALL CLASSES,
EXCEPT WHERE SUCH PRESENTATION IS NOT POSSIBLE(SUCH AS PER SHARE DATE). IN THOSE
CASES, ONLY THE INVESTOR CLASS INFORMATION IS PRESENTED.
</LEGEND>
<CIK> 0000757928
<NAME> BENHAM TARGET MATURITIES TRUST
<SERIES>
   <NUMBER> 5
   <NAME> BENHAM TARGET MATURITIES TRUST:2020
       
<S>                                           <C>
<PERIOD-TYPE>                                YEAR
<FISCAL-YEAR-END>                            NOV-30-1997
<PERIOD-END>                                 NOV-30-1997       <F1>
<INVESTMENTS-AT-COST>                             456,481,868
<INVESTMENTS-AT-VALUE>                            555,921,745
<RECEIVABLES>                                          13,003
<ASSETS-OTHER>                                     39,602,713
<OTHER-ITEMS-ASSETS>                                        0
<TOTAL-ASSETS>                                    595,537,461
<PAYABLE-FOR-SECURITIES>                           39,425,000
<SENIOR-LONG-TERM-DEBT>                                     0
<OTHER-ITEMS-LIABILITIES>                           2,561,434
<TOTAL-LIABILITIES>                                41,986,434
<SENIOR-EQUITY>                                    20,376,558
<PAID-IN-CAPITAL-COMMON>                          357,694,842
<SHARES-COMMON-STOCK>                              20,376,558
<SHARES-COMMON-PRIOR>                              42,102,669
<ACCUMULATED-NII-CURRENT>                          37,235,493
<OVERDISTRIBUTION-NII>                                      0
<ACCUMULATED-NET-GAINS>                            38,804,257
<OVERDISTRIBUTION-GAINS>                                    0
<ACCUM-APPREC-OR-DEPREC>                           99,439,877
<NET-ASSETS>                                      553,551,027
<DIVIDEND-INCOME>                                           0
<INTEREST-INCOME>                                  55,723,567
<OTHER-INCOME>                                        442,641
<EXPENSES-NET>                                      4,397,567
<NET-INVESTMENT-INCOME>                            51,768,641
<REALIZED-GAINS-CURRENT>                           45,078,260
<APPREC-INCREASE-CURRENT>                          85,510,156
<NET-CHANGE-FROM-OPS>                             182,357,057
<EQUALIZATION>                                              0
<DISTRIBUTIONS-OF-INCOME>                          54,220,221
<DISTRIBUTIONS-OF-GAINS>                                  831  <F2>
<DISTRIBUTIONS-OTHER>                                       0
<NUMBER-OF-SHARES-SOLD>                            21,885,096
<NUMBER-OF-SHARES-REDEEMED>                        43,514,345
<SHARES-REINVESTED>                                 2,286,212 <F2>
<NET-CHANGE-IN-ASSETS>                           (372,768,183)
<ACCUMULATED-NII-PRIOR>                            39,687,073
<ACCUMULATED-GAINS-PRIOR>                          (6,273,172)
<OVERDISTRIB-NII-PRIOR>                                     0
<OVERDIST-NET-GAINS-PRIOR>                                  0
<GROSS-ADVISORY-FEES>                               2,691,970
<INTEREST-EXPENSE>                                          0
<GROSS-EXPENSE>                                     4,397,567
<AVERAGE-NET-ASSETS>                              823,522,277
<PER-SHARE-NAV-BEGIN>                                   22.00 <F2>
<PER-SHARE-NII>                                          1.51
<PER-SHARE-GAIN-APPREC>                                  3.66
<PER-SHARE-DIVIDEND>                                     1.45
<PER-SHARE-DISTRIBUTIONS>                                0.00 <F2>
<RETURNS-OF-CAPITAL>                                     0.00
<PER-SHARE-NAV-END>                                     27.17 <F2>
<EXPENSE-RATIO>                                          0.53 <F2>
<AVG-DEBT-OUTSTANDING>                                      0
<AVG-DEBT-PER-SHARE>                                     0.00
<FN>
<F1>SCHEDULE RELFECTS THE TOTAL FOR ALL CLASSES, EXCEPT WHERE INDICATED.
<F2>INVESTOR CLASS INFORMATION ONLY.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF AMERICAN  CENTURY MUTUAL FUNDS,  INC. AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH  REPORT.  INFORMATION  PRESENTED IS A TOTAL OF ALL CLASSES,
EXCEPT WHERE SUCH PRESENTATION IS NOT POSSIBLE(SUCH AS PER SHARE DATE). IN THOSE
CASES, ONLY THE INVESTOR CLASS INFORMATION IS PRESENTED.
</LEGEND>
<CIK> 0000757928
<NAME> BENHAM TARGET MATURITIES TRUST
<SERIES>
   <NUMBER> 6
   <NAME> BENHAM TARGET MATURITIES TRUST:2025
       
<S>                                           <C>
<PERIOD-TYPE>                                YEAR
<FISCAL-YEAR-END>                            NOV-30-1997
<PERIOD-END>                                 NOV-30-1997       <F1>
<INVESTMENTS-AT-COST>                              64,514,424
<INVESTMENTS-AT-VALUE>                             73,664,221
<RECEIVABLES>                                               0
<ASSETS-OTHER>                                        331,422
<OTHER-ITEMS-ASSETS>                                        0
<TOTAL-ASSETS>                                     73,995,643
<PAYABLE-FOR-SECURITIES>                                    0
<SENIOR-LONG-TERM-DEBT>                                     0
<OTHER-ITEMS-LIABILITIES>                             174,328
<TOTAL-LIABILITIES>                                   174,328
<SENIOR-EQUITY>                                     3,314,198
<PAID-IN-CAPITAL-COMMON>                           58,683,844
<SHARES-COMMON-STOCK>                               3,314,198
<SHARES-COMMON-PRIOR>                               1,991,656
<ACCUMULATED-NII-CURRENT>                           2,872,123
<OVERDISTRIBUTION-NII>                                      0
<ACCUMULATED-NET-GAINS>                              (198,647)
<OVERDISTRIBUTION-GAINS>                                    0
<ACCUM-APPREC-OR-DEPREC>                            9,149,797
<NET-ASSETS>                                       73,821,315
<DIVIDEND-INCOME>                                           0
<INTEREST-INCOME>                                   3,792,500
<OTHER-INCOME>                                         34,749
<EXPENSES-NET>                                        349,230
<NET-INVESTMENT-INCOME>                             3,478,019
<REALIZED-GAINS-CURRENT>                              302,702
<APPREC-INCREASE-CURRENT>                           9,831,539
<NET-CHANGE-FROM-OPS>                              13,612,260
<EQUALIZATION>                                              0
<DISTRIBUTIONS-OF-INCOME>                           1,603,280
<DISTRIBUTIONS-OF-GAINS>                                    0  <F2>
<DISTRIBUTIONS-OTHER>                                       0
<NUMBER-OF-SHARES-SOLD>                             7,508,353
<NUMBER-OF-SHARES-REDEEMED>                         6,180,587
<SHARES-REINVESTED>                                    79,036 <F2>
<NET-CHANGE-IN-ASSETS>                             38,160,713
<ACCUMULATED-NII-PRIOR>                               997,384
<ACCUMULATED-GAINS-PRIOR>                            (501,349)
<OVERDISTRIB-NII-PRIOR>                                     0
<OVERDIST-NET-GAINS-PRIOR>                                  0
<GROSS-ADVISORY-FEES>                                 199,410
<INTEREST-EXPENSE>                                          0
<GROSS-EXPENSE>                                       367,010
<AVERAGE-NET-ASSETS>                               56,608,812
<PER-SHARE-NAV-BEGIN>                                   17.91 <F2>
<PER-SHARE-NII>                                          1.21
<PER-SHARE-GAIN-APPREC>                                  3.15
<PER-SHARE-DIVIDEND>                                     0.72
<PER-SHARE-DISTRIBUTIONS>                                0.00 <F2>
<RETURNS-OF-CAPITAL>                                     0.00
<PER-SHARE-NAV-END>                                     22.27 <F2>
<EXPENSE-RATIO>                                          0.62 <F2>
<AVG-DEBT-OUTSTANDING>                                      0
<AVG-DEBT-PER-SHARE>                                     0.00
<FN>
<F1>SCHEDULE RELFECTS THE TOTAL FOR ALL CLASSES, EXCEPT WHERE INDICATED.
<F2>INVESTOR CLASS INFORMATION ONLY.
</FN>
        

</TABLE>


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