AMERICAN CENTURY TARGET MATURITIES TRUST
N-30D, 1997-05-30
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                               SEMIANNUAL REPORT

                            [american century logo]
                                    American
                                  Century(sm)

                                 March 31, 1997

                                     BENHAM
                                     GROUP

                         Target Maturities Trust: 2000
                         Target Maturities Trust: 2005
                         Target Maturities Trust: 2010
                         Target Maturities Trust: 2015
                         Target Maturities Trust: 2020
                         Target Maturities Trust: 2025

[front cover]

                               TABLE OF CONTENTS

Our Message to You............................................   1
Report Highlights.............................................   2
Period Overview...............................................   4
Target Maturities Trust: 2000
   Performance & Portfolio Information........................   5
   Management Q & A...........................................   6
   Schedule of Investments....................................   8
   Financial Highlights.......................................  37
Target Maturities Trust: 2005
   Performance & Portfolio Information........................   9
   Management Q & A...........................................  10
   Schedule of Investments....................................  12
   Financial Highlights.......................................  38
Target Maturities Trust: 2010
   Performance & Portfolio Information........................  13
   Management Q & A...........................................  14
   Schedule of Investments....................................  16
   Financial Highlights.......................................  39
Target Maturities Trust: 2015
   Performance & Portfolio Information........................  17
   Management Q & A...........................................  18
   Schedule of Investments....................................  20
   Financial Highlights.......................................  40
Target Maturities Trust: 2020
   Performance & Portfolio Information........................  21
   Management Q & A...........................................  22
   Schedule of Investments....................................  24
   Financial Highlights.......................................  41
Target Maturities Trust: 2025
   Performance & Portfolio Information........................  25
   Management Q & A...........................................  26
   Schedule of Investments....................................  28
   Financial Highlights.......................................  42
Statements of Assets and Liabilities..........................  29
Statements of Operations......................................  30
Statements of Changes in Net Assets...........................  31
Notes to Financial Statements.................................  33
IRA/403(b) Information........................................  43
Background Information........................................  44
Glossary......................................................  45

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 needs, we have divided  American Century funds
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 -- Family of Funds


     BENHAM GROUP           AMERICAN CENTURY GROUP       TWENTIETH CENTURY GROUP

  MONEY MARKET FUNDS          ASSET ALLOCATION &
 GOVERNMENT BOND FUNDS          BALANCED FUNDS              U.S. GROWTH FUNDS
DIVERSIFIED BOND FUNDS     CONSERVATIVE EQUITY FUNDS       INTERNATIONAL FUNDS
 MUNICIPAL BOND FUNDS           SPECIALTY FUNDS

   Target Maturities
         Trust

We welcome your comments or questions about this report. 
See the back cover for ways to contact us by mail, phone or e-mail.

Twentieth  Century and the Benham Group are registered marks of American Century
Services Corporation and Benham Management Corporation,  respectively.  American
Century is a service mark of American Century Services Corporation.


                                                    American Century Investments


                               OUR MESSAGE TO YOU

[photo of James E. Stower, III and James M. Benham]

March 31,  1997,  marked the end of an  eventful  period for our company and the
zero-coupon  bond  market.  Over the past six  months,  the  zero-coupon  market
experienced both a significant  rally and a significant  sell-off in response to
changing  interest rate  expectations.  In the following  pages,  our investment
management team provides  further details about the market and how your fund was
managed during the year.

In January,  nearly two years of integration  between  Twentieth Century and The
Benham  Group   culminated  when  we  began  serving  you  as  American  Century
Investments.  Under this new name,  we have  combined our offerings of nearly 70
funds.

The new name also introduces three new groupings for the funds--the Benham Group
(money market and bond funds),  the American  Century  Group (asset  allocation,
balanced,  conservative  equity and specialty  funds) and the Twentieth  Century
Group (growth and international equity funds). The Target Maturities  portfolios
will  remain in the  Benham  Group  because  their  investment  goals  match key
attributes of that group.

In  reviewing  this report,  you may notice some  changes.  Based on  investors'
feedback,  our  shareholder  reports have been  redesigned  with added features,
including a two-page report  summary,  a glossary,  more charts and graphs,  and
expanded  management Q & A and  background  information  sections.  By June, all
American Century shareholder reports will have been converted to this format.

Another new  resource is the  American  Century Web site.  If you use a personal
computer  and have  Internet  access,  we've made it easier for you to  download
information  about American Century funds and access your fund accounts.  With a
personal  access code,  you can view account  balances,  exchange  money between
existing  accounts  and make  additional  investments.  The Web site address is:
www.americancentury.com.  We are one of the first fund companies to offer direct
on-line transactions via the Internet.

In June,  you will receive a proxy  statement and ballot that  proposes  several
changes  to your fund.  The proxy  statement  contains  more  details  about the
proposed changes;  we strongly  encourage you to read it carefully and take part
in the proxy vote.

We appreciate your confidence in American Century and look forward to continuing
to serve you.

Sincerely,

/s/James E. Stowers III                     /s/James M. Benham 
James E. Stowers III                        James M. Benham
President and Chief Executive Officer       Vice Chairman
American Century Companies                  American Century Companies


Semiannual Report                                        Our Message to You    1


                               REPORT HIGHLIGHTS

Period Overview

o    The U.S.  economy  expanded at a healthy 3.8% annual rate during the fourth
     quarter of 1996 and at an even more  impressive  5.6% rate during the first
     quarter of 1997--the largest quarterly increase in a decade.

o    While the economy  continued  its  impressive  growth,  inflation  remained
     relatively   subdued.   Overall   consumer   prices--as   measured  by  the
     government's  consumer price  index--rose at a mere 1.8% annual rate during
     the first quarter of 1997.

o    In the zero-coupon bond market,  shifting expectations over the possibility
     of an interest rate increase by the Federal Reserve kept investors guessing
     about the possible direction of bond prices during the six-month period.

o    Looking ahead to the next six months in the U.S. Treasury zero market,  our
     most  important  consideration  may  be  increased  demand  from  investors
     purchasing zeros to add duration to their portfolios.

Target Maturities Trust: 2000

o    The fund posted a 2.04% total return for the six-month period.

o    We kept the fund's weighted  average maturity date close to the benchmark's
     November 15, 2000 maturity date to ensure that the fund closely tracked its
     benchmark's performance.

o    Looking forward,  we will likely keep the fund's maturity date close to the
     November  15,  2000  maturity of its  benchmark  to help the fund reach its
     anticipated value at maturity.

Target Maturities Trust: 2005

o    The fund posted a 1.25% total return for the six-month  period,  reflecting
     the unfavorable U.S. bond market conditions that prevailed in early 1997.

o    We kept the fund's weighted  average maturity date close to its benchmark's
     November 15, 2005  maturity  date to ensure the fund's close  tracking with
     its benchmark.

o    Looking forward,  we will likely keep the fund's maturity date close to the
     November  15,  2005  maturity of its  benchmark  to help the fund reach its
     anticipated value at maturity.

Target Maturities Trust: 2010

o    The fund posted a 1.37% total return for the six-month  period,  reflecting
     the unfavorable U.S. bond market conditions that prevailed in early 1997.

o    By  selling  some of the  fund's  STRIPS  maturing  in  November  2009  and
     purchasing  STRIPS  maturing  in  November  2010,  we  extended  the fund's
     weighted average maturity date to September 21, 2010.

o    Looking  forward,   we  will  likely  maintain  the  fund's  current  asset
     allocation,  keeping  the  majority  of the  fund's  assets in  STRIPS  and
     REFCORPs.

                                  Target: 2000

                         Total Returns:      AS OF 3/31/97
                          6 Months                  2.04%*
                          1 Year                     3.63%
                         Net Assets:        $258.4 million
                         (AS of 3/31/97)
                         Inception Date:           3/25/85
                         Ticker Symbol:              BTMTX


                                  Target: 2005

                         Total Returns:      AS OF 3/31/97
                          6 Months                  1.25%*
                          1 Year                     2.29%
                         Net Assets:        $234.0 million
                         (AS of 3/31/97)
                         Inception Date:           3/25/85
                         Ticker Symbol:              BTFIX


                                  Target: 2010

                         Total Returns:      AS OF 3/31/97
                          6 Months                  1.37%*
                          1 Year                     2.04%
                         Net Assets:        $100.7 million
                         (AS of 3/31/97)
                         Inception Date:           3/25/85
                         Ticker Symbol:              BTTNX
                         * Not annualized.


2    Report Highlights                              American Century Investments


                               REPORT HIGHLIGHTS

Target Maturities Trust: 2015

o    Reflecting the  unfavorable  U.S. bond market  conditions that prevailed in
     early 1997, the fund posted a 0.97% total return for the six-month period.

o    We kept the fund's weighted average maturity date close to the November 15,
     2015 maturity date of its benchmark.

o    Looking  forward,  we will likely keep the fund's current asset  allocation
     for the time being, with roughly 50% of its assets invested in REFCORPs and
     the other 50% in STRIPS.

Target Maturities Trust: 2020

o    The fund posted a 0.50% total return for the six-month  period,  reflecting
     the unfavorable U.S. bond market conditions that prevailed in early 1997.

o    We extended the fund's weighted average maturity (WAM) date from August 21,
     2020,  to September  12, 2020,  bringing it closer to the November 15, 2020
     maturity date of its benchmark.

o    Looking  forward,  we will  likely  continue  shifting  the fund's WAM date
     closer to the November 15, 2020 maturity date of its benchmark.

Target Maturities Trust: 2025

o    As a result of rising yields on long-term  zeros,  the fund posted a -1.56%
     total return for the six-month period.

o    We used  incoming  assets to purchase  REFCORPs  because  they offered more
     yield and higher potential returns than STRIPS in this maturity sector.

o    Looking  forward,  we will likely continue our efforts to extend the fund's
     weighted  average maturity date so that it can better track the performance
     of its benchmark.

                                  Target: 2015

                         Total Returns:      AS OF 3/31/97
                           6 Months                 0.97%*
                           1 Year                    1.70%
                         Net Assets:        $104.9 million
                           (AS of 3/31/97)
                         Inception Date:            9/1/86
                         Ticker Symbol:              BTFTX

                                  Target: 2020

                         Total Returns:      AS OF 3/31/97
                           6 Months                 0.50%*
                           1 Year                    1.01%
                         Net Assets:        $831.4 million
                           (AS of 3/31/97)
                         Inception Date:          12/29/89
                         Ticker Symbol:              BTTTX

                                  Target: 2025

                         Total Returns:      AS OF 3/31/97
                           6 Months                -1.56%*
                           1 Year                   -2.65%
                         Net Assets:         $55.3 million
                           (AS of 3/31/97)
                         Inception Date:           2/15/96
                         Ticker Symbol:              BTTRX
                         * Not annualized.

                 Many of the investment terms in this report are
                       defined in the Glossary on page 45.


Semiannual Report                                         Report Highlights    3


                                PERIOD OVERVIEW

U.S. Economy

The U.S.  economy grew vigorously  during the six months ended March 31, 1997. A
low unemployment rate, job growth, strong consumer spending and a robust housing
market were  responsible  for much of the economy's  surprising  strength.  As a
result,  the economy  expanded  at a healthy  3.8% annual rate during the fourth
quarter  of 1996 and at an even  more  impressive  5.6%  rate  during  the first
quarter of 1997--the largest quarterly increase in a decade.

While the economy continued its impressive growth, inflation remained relatively
subdued. Overall consumer prices--as measured by the government's consumer price
index--rose  at a mere 1.8% annual rate during the first  quarter of 1997.  This
unusual  combination of high growth and low inflation sent mixed signals to U.S.
bond investors.

Zero-Coupon Bond Market

In the zero-coupon bond market, shifting expectations over the possibility of an
interest rate increase by the Federal Reserve (the Fed) kept investors  guessing
about the direction of bond prices.

The effects of these shifting  expectations are demonstrated by the accompanying
graph, depicting the Treasury zero yield curve. Derived from the Treasury curve,
the zero yield curve exaggerates  fluctuations in Treasury yields. When Treasury
rates fall,  zero rates  typically fall faster;  similarly,  when Treasury rates
rise, zero rates tend to increase faster than Treasury rates.

At  the  beginning  of  the  six-month  period,  zero  yields  reflected  strong
expectations  that  the  Fed  would  raise  short-term  interest  rates  to keep
inflation at bay. However,  those expectations  changed in October as signs of a
moderating  U.S.  economy  convinced  many that a rate hike was  unlikely.  As a
result, zero-coupon bonds rallied throughout the fourth quarter of 1996. By late
December, long-term zero-coupon bond yields bottomed at 6.70%, half a percentage
point lower than the 7.20% level seen in early October.

However,  strong consumer  spending  activity fueled increased hiring and rising
wages in the first quarter of 1997 and the slowdown in economic  activity  never
materialized.  With  renewed  expectations  of a  Fed  interest  rate  increase,
investors  pushed  bond  yields  higher.  Helping to fuel these  concerns  was a
semiannual  report on the state of the U.S.  economy  delivered  in  February by
Federal Reserve  Chairman Alan Greenspan.  Within his testimony,  Mr.  Greenspan
expressed the Fed's concerns about the growing strains of robust economic growth
and put forward the notion of a pre-emptive strike against inflation.

Matching words to actions, the Fed raised short-term interest rates in March for
the first time since  February  1995. In response,  concerned  investors  pushed
long-term  Treasury  zero bond yields to 7.40% amid  speculation  that the Fed's
latest action was only the first in an upward trend.

Going forward,  the most important  consideration  may be increased  demand from
investors  purchasing zeros to add duration to their portfolios.  Recently,  net
stripping activity has surged,  with about $1.8 billion in bonds with maturities
longer than ten years net stripped in March. This activity indicates an increase
in demand for longer-maturity  zeros. As zero coupon bond yields approach 7.50%,
longer-maturity  zeros become an increasingly  attractive  vehicle for extending
duration and a viable investment alternative to stocks.


[line graph - data below]

                         Shifting Yield Curve for Zeros

Years to Maturity       10/1/96          12/2/96           3/31/97
1                        5.78             5.41              6.07
2                        6.07             5.60              6.42
3                        6.23             5.70              6.57
4                        6.31             5.77              6.65
5                        6.36             5.82              6.70
6                        6.44             5.89              6.77
7                        6.52             5.96              6.83
8                        6.62             6.06              6.93
9                        6.67             6.10              6.95
10                       6.73             6.17              7.00
11                       6.77             6.21              7.03
12                       6.81             6.25              7.06
13                       6.84             6.29              7.09
14                       6.88             6.33              7.12
15                       6.92             6.37              7.15
16                       6.94             6.39              7.16
17                       6.95             6.41              7.17
18                       6.97             6.42              7.19
19                       6.98             6.44              7.20
20                       7.00             6.46              7.21
21                       7.00             6.47              7.21
22                       7.00             6.48              7.21
23                       7.01             6.48              7.21
24                       7.01             6.49              7.21
25                       7.01             6.50              7.21
26                       6.99             6.48              7.20
27                       6.97             6.46              7.18
28                       6.94             6.45              7.17
29                       6.92             6.43              7.15
30                       6.90             6.41              7.14

Source: Bloomberg Financial Markets


4    Period Overview                                American Century Investments

<TABLE>
<CAPTION>

                         TARGET MATURITIES TRUST: 2000

                                                                        AVERAGE ANNUAL RETURNS
                                                           --------------------------------------------------
                                            6 MONTHS       1 YEAR        3 YEARS       5 YEARS       10 YEARS
TOTAL RETURNS AS OF MARCH 31, 1997
<S>                                           <C>           <C>           <C>           <C>           <C>  
Target Maturities Trust: 2000 ..............  2.04%         3.63%         6.26%         8.46%         8.53%
11/15/00 Maturity
STRIPS Issue ...............................  2.33%         4.03%         6.75%         8.89%          9.01%
Merrill Lynch Long-Term
Treasury Index .............................  1.48%         2.83%         7.20%         8.78%          8.83%

See pages 44-45 for more information  about returns,  the comparative  index and
the fund's benchmark.
</TABLE>

[mountain graph - data below]

GROWTH OF $10,000 OVER TEN YEARS

Value on 3/31/97

$10,000 investment made 3/31/87

            Target: 2000  11/15/00 STRIPS Issue Merrill   Lynch Long-Term Index
Mar-87        $10,000            $10,000                   $10,000
Apr-87         $9,288             $9,312                    $9,581
May-87         $9,169             $9,067                    $9,496
Jun-87         $9,205             $9,185                    $9,606
Jul-87         $8,883             $8,885                    $9,424
Aug-87         $8,580             $8,600                    $9,270
Sep-87         $8,102             $8,142                    $8,857
Oct-87         $8,908             $8,978                    $9,508
Nov-87         $8,930             $8,926                    $9,512
Dec-87         $9,263             $9,199                    $9,702
Jan-88         $9,880             $9,973                   $10,288
Feb-88        $10,092            $10,181                   $10,415
Mar-88         $9,661             $9,700                   $10,092
Apr-88         $9,464             $9,470                    $9,929
May-88         $9,230             $9,355                    $9,755
Jun-88         $9,764             $9,884                   $10,166
Jul-88         $9,539             $9,588                    $9,974
Aug-88         $9,569             $9,668                   $10,012
Sep-88        $10,067            $10,146                   $10,390
Oct-88        $10,450            $10,546                   $10,696
Nov-88        $10,189            $10,287                   $10,462
Dec-88        $10,328            $10,328                   $10,595
Jan-89        $10,592            $10,743                   $10,809
Feb-89        $10,233            $10,365                   $10,592
Mar-89        $10,375            $10,480                   $10,705
Apr-89        $10,717            $10,800                   $10,956
May-89        $11,140            $11,276                   $11,392
Jun-89        $11,895            $12,045                   $12,038
Jul-89        $12,201            $12,313                   $12,312
Aug-89        $11,843            $11,964                   $11,985
Sep-89        $11,893            $12,003                   $12,030
Oct-89        $12,351            $12,534                   $12,513
Nov-89        $12,454            $12,643                   $12,615
Dec-89        $12,374            $12,630                   $12,597
Jan-90        $11,829            $12,079                   $12,168
Feb-90        $11,820            $12,033                   $12,115
Mar-90        $11,834            $12,020                   $12,084
Apr-90        $11,454            $11,652                   $11,774
May-90        $11,996            $12,246                   $12,324
Jun-90        $12,287            $12,540                   $12,605
Jul-90        $12,415            $12,695                   $12,734
Aug-90        $11,857            $12,116                   $12,183
Sep-90        $11,982            $12,223                   $12,339
Oct-90        $12,318            $12,645                   $12,614
Nov-90        $12,863            $13,181                   $13,137
Dec-90        $13,155            $13,489                   $13,411
Jan-91        $13,255            $13,634                   $13,563
Feb-91        $13,305            $13,578                   $13,616
Mar-91        $13,366            $13,679                   $13,660
Apr-91        $13,558            $13,943                   $13,841
May-91        $13,538            $13,861                   $13,840
Jun-91        $13,446            $13,773                   $13,731
Jul-91        $13,646            $14,001                   $13,932
Aug-91        $14,194            $14,514                   $14,418
Sep-91        $14,639            $15,028                   $14,868
Oct-91        $14,767            $15,073                   $14,916
Nov-91        $14,944            $15,362                   $14,988
Dec-91        $15,873            $16,320                   $15,883
Jan-92        $15,222            $15,641                   $15,367
Feb-92        $15,320            $15,730                   $15,476
Mar-92        $15,108            $15,482                   $15,306
Apr-92        $15,103            $15,580                   $15,311
May-92        $15,517            $15,920                   $15,714
Jun-92        $15,926            $16,339                   $15,939
Jul-92        $16,637            $17,070                   $16,590
Aug-92        $16,840            $17,320                   $16,731
Sep-92        $17,276            $17,775                   $16,987
Oct-92        $16,848            $17,309                   $16,649
Nov-92        $16,759            $17,224                   $16,700
Dec-92        $17,218            $17,686                   $17,144
Jan-93        $17,754            $18,256                   $17,652
Feb-93        $18,396            $18,917                   $18,237
Mar-93        $18,480            $19,034                   $18,286
Apr-93        $18,663            $19,227                   $18,420
May-93        $18,605            $19,161                   $18,488
Jun-93        $19,322            $19,897                   $19,265
Jul-93        $19,391            $19,974                   $19,562
Aug-93        $19,972            $20,571                   $20,347
Sep-93        $20,120            $20,747                   $20,437
Oct-93        $20,131            $20,726                   $20,563
Nov-93        $19,772            $20,368                   $20,039
Dec-93        $19,880            $20,479                   $20,099
Jan-94        $20,275            $20,898                   $20,587
Feb-94        $19,572            $20,185                   $19,727
Mar-94        $18,899            $19,482                   $18,922
Apr-94        $18,652            $19,215                   $18,632
May-94        $18,666            $19,246                   $18,542
Jun-94        $18,558            $19,148                   $18,375
Jul-94        $18,936            $19,551                   $18,956
Aug-94        $18,997            $19,613                   $18,838
Sep-94        $18,602            $19,206                   $18,267
Oct-94        $18,494            $19,113                   $18,186
Nov-94        $18,369            $18,989                   $18,283
Dec-94        $18,510            $19,132                   $18,604
Jan-95        $18,913            $19,586                   $19,079
Feb-95        $19,511            $20,236                   $19,615
Mar-95        $19,589            $20,311                   $19,757
Apr-95        $19,914            $20,640                   $20,106
May-95        $20,931            $21,711                   $21,661
Jun-95        $21,117            $21,891                   $21,922
Jul-95        $20,987            $21,787                   $21,580
Aug-95        $21,192            $22,006                   $22,045
Sep-95        $21,362            $22,132                   $22,443
Oct-95        $21,693            $22,539                   $23,104
Nov-95        $22,071            $22,942                   $23,670
Dec-95        $22,349            $23,217                   $24,310
Jan-96        $22,565            $23,487                   $24,297
Feb-96        $22,148            $23,043                   $23,112
Mar-96        $21,879            $22,780                   $22,672
Apr-96        $21,676            $22,554                   $22,293
May-96        $21,579            $22,470                   $22,186
Jun-96        $21,848            $22,756                   $22,636
Jul-96        $21,898            $22,821                   $22,636
Aug-96        $21,876            $22,792                   $22,360
Sep-96        $22,222            $23,159                   $22,972
Oct-96        $22,673            $23,670                   $23,868
Nov-96        $23,022            $24,011                   $24,653
Dec-96        $22,794            $23,788                   $24,069
Jan-97        $22,867            $23,875                   $23,913
Feb-97        $22,869            $23,875                   $23,880
Mar-97        $22,674            $23,699                   $23,312

Past  performance  does not  guarantee  future  results.  Investment  return and
principal  value will fluctuate,  and redemption  value may be more or less than
original cost. The line representing the fund's total return includes  operating
expenses (such as transaction  costs and management  fees) that reduce  returns,
while the total return line of the index does not.


PORTFOLIO AT A GLANCE
                                     3/31/97           9/30/96
Number of Securities                   47                33
Anticipated Growth Rate               6.00%             5.75%
Weighted Average Maturity Date      11/12/00          11/23/00
Anticipated Value at Maturity        $101.00           $101.10
Expense Ratio                        0.54%*             0.53%

* Annualized.

           You will receive a proxy statement in June. Please read it
                   carefully and take part in the proxy vote.


Semiannual Report                             Target Maturities Trust: 2000    5


                         TARGET MATURITIES TRUST: 2000

Management Q & A

An interview with Dave Schroeder,  a vice president and senior portfolio manager
on the Target Maturities Trust management team.

HOW DID THE FUND PERFORM DURING THE SIX-MONTH PERIOD ENDED MARCH 31, 1997?

The fund posted a 2.04% total return for the  six-month  period.  Because of its
shorter  weighted  average maturity (WAM), the fund's returns suffered less than
other Target funds as interest rates rose early in 1997. The fund's benchmark, a
coupon  STRIPS  issue  maturing on November  15,  2000,  returned  2.33% for the
six-month  period.  (See the Total  Returns table on the previous page for other
fund performance comparisons.)

WHY DID THE FUND UNDERPERFORM ITS BENCHMARK?

The fund is managed to mimic the performance of its benchmark, but is subject to
operating  expenses (such as transaction costs and management  fees),  while the
benchmark  is not. We try to add value to the fund where we can,  but mostly try
to stay true to the benchmark. As a result, the fund frequently underperforms by
a few basis points.

HOW DID YOU POSITION THE FUND DURING THE LAST SIX MONTHS?

We kept the fund's WAM date close to the benchmark's  November 15, 2000 maturity
date to ensure that the fund closely  tracked its  benchmark's  performance.  To
minimize the fund's  transaction  costs and turnover  rate, we used cash inflows
and outflows as  

[line graph - data below]
           TARGET 2000: SHARE PRICE VS. ANTICIPATED VALUE AT MATURITY

             Actual Share Price            Anticipated Value at Maturity
                 (Historical)                  (Estimated Share Price)

1987                33.33                               98.69
1988                37.16                               97.43
1989                44.52                               96.21
1990                47.33                               97.59
1991                57.11                               98.91
1992               61.947                              101.16
1993               71.526                              100.708
1994               66.598                              100.829
1995               80.408                              100.992
1996               79.947                              101.102
1997
1998
1999
2000                                                   100.00


The top line in the graph  represents the fund's  Anticipated  Value at Maturity
(AVM),  which has a target of $100 but  fluctuates  from day to day based on the
fund's expected  maturity date. The bottom line represents the fund's historical
share price, which is managed to grow over time to reach the fund's AVM.

While this graph  demonstrates  the fund's  expected  long-term  growth pattern,
please  keep in mind  that  the  fund  may  experience  significant  share-price
volatility over the short term.

Past performance is no guarantee of future results. Even if fund shares are held
to maturity,  there is no  guarantee  that the fund's share price will reach its
AVM. For more information, please consult the prospectus.


6    Target Maturities Trust: 2000                  American Century Investments


                         TARGET MATURITIES TRUST: 2000

opportunities to buy or sell securities.  We also made slight adjustments to the
fund's average maturity when these opportunities presented themselves.

To meet the cash outflows that the fund experienced  during the period,  we sold
some STRIPS.  These securities were sold instead of REFCORPs or other non-STRIPS
holdings because STRIPS  generally have lower yields and higher prices.  We also
continued to avoid coupon STRIPS  because their yields are typically  lower than
principal STRIPS.

LOOKING  AHEAD,  WHAT IS YOUR OUTLOOK FOR THE TREASURY  MARKET OVER THE NEXT SIX
MONTHS?

Bond yields rose dramatically in the first quarter of 1997,  largely because the
U.S.  economy has shown  faster-than-normal  growth and wages have been  rising.
These factors also led the Federal Reserve to raise short-term interest rates in
March.  The Fed appears to be in a  rate-raising  mode; our only question is how
high rates will go.

Historically,  the  average  Fed  "tightening  cycle"--a  series of  consecutive
short-term interest rate increases designed to restrain economic growth and head
off  inflation--consisted  of four  rate  hikes  totaling  200  basis  points (2
percentage  points).  That  magnitude of  tightening  seems  unlikely  this time
around,  especially  because rising wage pressures have not  materialized in the
consumer inflation figures.  In addition,  the rise in bond yields over the past
few months may already be enough to slow economic activity and keep inflation at
bay. Overall, we believe that this will be a mild Fed tightening cycle.

Nevertheless,  the bond market has already  priced in another Fed rate increase,
even though inflation remained tame in the first quarter of 1997.

WHAT IS YOUR STRATEGY GOING FORWARD?

To help the fund reach its  anticipated  value at maturity (AVM), we will likely
continue to keep its maturity  date close to the  November 15, 2000  maturity of
its benchmark.  Although there can be no assurances that the fund will reach its
AVM, we manage the fund to reach or exceed this value at maturity.

We will also continue looking for  opportunities to improve the fund's liquidity
by  replacing  receipt  zeros with STRIPS when we can do so without  sacrificing
yield.

[pie charts]

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 3/31/97)
STRIPS 66%
TRs 26%
Other 8%

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 9/30/96)
STRIPS 68%
TRs 24%
Other 8%


Semiannual Report                             Target Maturities Trust: 2000    7


                            SCHEDULE OF INVESTMENTS
                         TARGET MATURITIES TRUST: 2000

MARCH 31, 1997 (UNAUDITED)

Principal Amount                                                      Value
- -------------------------------------------------------------------------------

ZERO-COUPON U.S. TREASURY SECURITIES(1)
$    71,250   CUBES, 6.57%, 8/15/99                        $         61,107
     75,000   ETR, 6.70%, 11/15/99                                   63,100
    153,000   STRIPS -- COUPON, 6.56%,
                11/15/99                                            129,183
  2,836,700   TBR, 6.71%, 11/15/99                                2,386,005
    424,800   TR, 6.63%, 11/15/99                                   358,034
    133,000   CATS, 6.665%, 2/15/00                                 110,147
     88,125   CUBES, 6.675%, 2/15/00                                 72,962
 13,069,000   STRIPS-- PRINCIPAL, 6.615%,
                2/15/00                                          10,838,383
    306,945   TBR, 6.745%, 2/15/00                                  253,638
 30,036,209   TR, 6.665%, 2/15/00                                24,875,087
    149,000   CATS, 6.70%, 5/15/00                                  121,295
  5,850,000   CUBES, 6.80%, 5/15/00                               4,747,919
  1,494,525   TBR, 6.78%, 5/15/00                                 1,213,704
 47,967,000   STRIPS -- PRINCIPAL, 6.685%,
                8/15/00                                          38,418,689
    894,045   TBR, 6.80%, 8/15/00                                   713,385
  3,932,000   COUGAR, 6.78%, 11/15/00                             3,088,468
    410,625   CUBES, 6.75%, 11/15/00                                322,874
 78,191,000   STRIPS -- PRINCIPAL, 6.705%,
                11/15/00                                         61,578,540
  3,754,000   TIGR, 6.75%, 11/15/00                               2,951,770
  2,252,886   TR, 6.74%, 11/15/00                                 1,772,053
     75,000   CATS, 6.755%, 2/15/01                                  57,975
 58,184,000   STRIPS-- PRINCIPAL, 6.725%,
                2/15/01                                          45,026,852
  4,657,000   TIGR, 6.765%, 2/15/01                               3,598,510
 20,422,328   TR, 6.755%, 2/15/01                                15,786,460
  1,400,000   COUGAR, 6.81%, 5/15/01                              1,062,334
  1,496,250   CUBES, 6.87%, 5/15/01                               1,132,661
     44,000   TIGR, 6.78%, 5/15/01                                   33,428
 24,350,000   TR, 6.77%, 5/15/01                                 18,506,487
 18,450,000   STRIPS -- PRINCIPAL, 6.78%,
                8/15/01                                          13,781,228
  7,060,020   TR, 6.79%, 8/15/01                                  5,271,293
                                                                 ----------
TOTAL INVESTMENT SECURITIES--100.0%                            $258,333,571
   (Cost $256,034,676)                                         ============

Notes to Schedule of Investments
CATS = Certificates of Accrual of Treasury Securities
COUGAR = Coupons on Underlying Government Securities
CUBES = Coupons Under Book Entry Safekeeping
ETR = Easy Growth Treasury Receipts
STRIPS = Separate Trading of Registered Interest and Principal of Securities 
TBR = Treasury Bond Receipts  
TIGR = Treasury Investment Growth Receipts  
TR = Treasury  Receipts  
(1)  The  effective  yield to  maturity at March 31,  1997 is  indicated.  These
     securities  are  purchased at a  substantial  discount  from their value at
     maturity.

See Notes to Financial Statements


8    Target Maturities Trust: 2000                  American Century Investments

<TABLE>
<CAPTION>
                         TARGET MATURITIES TRUST: 2005

                                                                        AVERAGE ANNUAL RETURNS
                                                           --------------------------------------------------
                                            6 MONTHS       1 YEAR        3 YEARS       5 YEARS       10 YEARS
TOTAL RETURNS AS OF MARCH 31, 1997
<S>                                           <C>           <C>           <C>          <C>            <C>  
Target Maturities Trust: 2005 .............   1.25%         2.29%         7.69%        10.30%         9.53%
11/15/05 Maturity
STRIPS Issue ..............................   1.61%         2.62%         8.16%        10.55%          9.90%
Merrill Lynch Long-Term
Treasury Index ............................   1.48%         2.83%         7.20%         8.78%          8.83%

See pages 44-45 for more information  about returns,  the comparative  index and
the fund's benchmark.
</TABLE>

[mountain graph - data below]

GROWTH OF $10,000 OVER TEN YEARS

Value on 3/31/97

$10,000 investment made 3/31/87

            Target: 2005   11/15/05 STRIPS Issue   Merrill Lynch Long-Term Index

Mar-87        $10,000            $10,000                   $10,000
Apr-87         $9,219             $9,196                    $9,581
May-87         $9,003             $8,986                    $9,496
Jun-87         $9,020             $9,168                    $9,606
Jul-87         $8,608             $8,720                    $9,424
Aug-87         $8,226             $8,312                    $9,270
Sep-87         $7,610             $7,684                    $8,857
Oct-87         $8,659             $8,769                    $9,508
Nov-87         $8,654             $8,673                    $9,512
Dec-87         $9,032             $9,061                    $9,702
Jan-88         $9,898            $10,109                   $10,288
Feb-88        $10,072            $10,200                   $10,415
Mar-88         $9,359             $9,507                   $10,092
Apr-88         $9,126             $9,137                    $9,929
May-88         $8,816             $8,969                    $9,755
Jun-88         $9,648             $9,772                   $10,166
Jul-88         $9,202             $9,289                    $9,974
Aug-88         $9,257             $9,368                   $10,012
Sep-88         $9,830             $9,980                   $10,390
Oct-88        $10,386            $10,543                   $10,696
Nov-88        $10,030            $10,197                   $10,462
Dec-88        $10,340            $10,456                   $10,595
Jan-89        $10,649            $10,864                   $10,809
Feb-89        $10,272            $10,508                   $10,592
Mar-89        $10,433            $10,690                   $10,705
Apr-89        $10,772            $11,004                   $10,956
May-89        $11,312            $11,628                   $11,392
Jun-89        $12,339            $12,587                   $12,038
Jul-89        $12,521            $12,732                   $12,312
Aug-89        $12,110            $12,253                   $11,985
Sep-89        $12,143            $12,295                   $12,030
Oct-89        $12,831            $13,071                   $12,513
Nov-89        $12,971            $13,217                   $12,615
Dec-89        $12,810            $13,099                   $12,597
Jan-90        $11,957            $12,213                   $12,168
Feb-90        $11,851            $12,127                   $12,115
Mar-90        $11,829            $12,049                   $12,084
Apr-90        $11,320            $11,454                   $11,774
May-90        $12,101            $12,373                   $12,324
Jun-90        $12,475            $12,793                   $12,605
Jul-90        $12,517            $12,831                   $12,734
Aug-90        $11,626            $11,825                   $12,183
Sep-90        $11,774            $11,976                   $12,339
Oct-90        $12,101            $12,373                   $12,614
Nov-90        $12,950            $13,274                   $13,137
Dec-90        $13,268            $13,619                   $13,411
Jan-91        $13,357            $13,773                   $13,563
Feb-91        $13,425            $13,667                   $13,616
Mar-91        $13,447            $13,738                   $13,660
Apr-91        $13,663            $13,936                   $13,841
May-91        $13,570            $13,822                   $13,840
Jun-91        $13,396            $13,683                   $13,731
Jul-91        $13,633            $13,998                   $13,932
Aug-91        $14,308            $14,584                   $14,418
Sep-91        $14,911            $15,275                   $14,868
Oct-91        $14,890            $15,192                   $14,916
Nov-91        $14,970            $15,310                   $14,988
Dec-91        $16,116            $16,547                   $15,883
Jan-92        $15,420            $15,833                   $15,367
Feb-92        $15,501            $15,908                   $15,476
Mar-92        $15,225            $15,563                   $15,306
Apr-92        $15,102            $15,423                   $15,311
May-92        $15,666            $15,992                   $15,714
Jun-92        $15,942            $16,250                   $15,939
Jul-92        $16,880            $17,196                   $16,590
Aug-92        $17,037            $17,372                   $16,731
Sep-92        $17,479            $17,859                   $16,987
Oct-92        $16,940            $17,280                   $16,649
Nov-92        $16,995            $17,349                   $16,700
Dec-92        $17,657            $18,056                   $17,144
Jan-93        $18,234            $18,685                   $17,652
Feb-93        $19,189            $19,637                   $18,237
Mar-93        $19,151            $19,661                   $18,286
Apr-93        $19,414            $19,917                   $18,420
May-93        $19,431            $19,996                   $18,488
Jun-93        $20,632            $21,234                   $19,265
Jul-93        $20,913            $21,523                   $19,562
Aug-93        $21,783            $22,425                   $20,347
Sep-93        $22,003            $22,749                   $20,437
Oct-93        $22,110            $22,816                   $20,563
Nov-93        $21,295            $21,946                   $20,039
Dec-93        $21,464            $22,127                   $20,099
Jan-94        $22,207            $22,851                   $20,587
Feb-94        $20,951            $21,593                   $19,727
Mar-94        $19,898            $20,310                   $18,922
Apr-94        $19,699            $19,998                   $18,632
May-94        $19,588            $19,905                   $18,542
Jun-94        $19,393            $19,712                   $18,375
Jul-94        $20,000            $20,366                   $18,956
Aug-94        $19,953            $20,347                   $18,838
Sep-94        $19,198            $19,560                   $18,267
Oct-94        $19,049            $19,452                   $18,186
Nov-94        $19,194            $19,578                   $18,283
Dec-94        $19,554            $19,966                   $18,604
Jan-95        $20,047            $20,503                   $19,079
Feb-95        $20,781            $21,261                   $19,615
Mar-95        $20,955            $21,448                   $19,757
Apr-95        $21,396            $21,912                   $20,106
May-95        $23,268            $23,852                   $21,661
Jun-95        $23,565            $24,159                   $21,922
Jul-95        $23,124            $23,739                   $21,580
Aug-95        $23,608            $24,240                   $22,045
Sep-95        $24,028            $24,677                   $22,443
Oct-95        $24,622            $25,313                   $23,104
Nov-95        $25,327            $26,050                   $23,670
Dec-95        $25,938            $26,691                   $24,310
Jan-96        $25,972            $26,751                   $24,297
Feb-96        $24,754            $25,490                   $23,112
Mar-96        $24,295            $25,044                   $22,672
Apr-96        $23,803            $24,503                   $22,293
May-96        $23,625            $24,330                   $22,186
Jun-96        $24,083            $24,839                   $22,636
Jul-96        $24,117            $24,856                   $22,636
Aug-96        $23,892            $24,619                   $22,360
Sep-96        $24,547            $25,294                   $22,972
Oct-96        $25,431            $26,299                   $23,868
Nov-96        $26,254            $27,082                   $24,653
Dec-96        $25,616            $26,419                   $24,069
Jan-97        $25,527            $26,383                   $23,913
Feb-97        $25,501            $26,336                   $23,880
Mar-97        $24,851            $25,700                   $23,312


Past  performance  does not  guarantee  future  results.  Investment  return and
principal  value will fluctuate,  and redemption  value may be more or less than
original cost. The line representing the fund's total return includes  operating
expenses (such as transaction  costs and management  fees) that reduce  returns,
while the total return line of the index does not.


PORTFOLIO AT A GLANCE
                                     3/31/97           9/30/96
Number of Securities                   35                36
Anticipated Growth Rate               6.40%             6.17%
Weighted Average Maturity Date      11/16/05          11/18/05
Anticipated Value at Maturity        $100.84           $100.71
Expense Ratio                        0.56%*             0.58%

* Annualized.

           You will receive a proxy statement in June. Please read it
                   carefully and take part in the proxy vote.


Semiannual Report                             Target Maturities Trust: 2005    9


                         TARGET MATURITIES TRUST: 2005

Management Q & A

An interview with Dave Schroeder,  a vice president and senior portfolio manager
on the Target Maturities Trust management team.

HOW DID THE FUND PERFORM DURING THE SIX-MONTH PERIOD ENDED MARCH 31, 1997?

The fund posted a 1.25% total return for the six-month  period,  reflecting  the
unfavorable U.S. bond market conditions that prevailed in early 1997. The fund's
benchmark,  a coupon STRIPS issue maturing on November 15, 2005,  returned 1.61%
for the six-month period.  (See the Total Returns table on the previous page for
other fund performance comparisons.)

WHY DID THE FUND UNDERPERFORM ITS BENCHMARK?

The fund is managed to mimic the performance of its benchmark, but is subject to
operating  expenses  (such as transaction  costs and  management  fees) that the
benchmark  does not  have.  We try to add  value to the fund  where we can,  but
mostly  try to stay  true to the  benchmark.  As a result,  the fund  frequently
underperforms by a few basis points.

HOW DID YOU POSITION THE FUND DURING THE LAST SIX MONTHS?

We kept the fund's weighted average maturity (WAM) date close to its benchmark's
November 15, 2005  maturity  date to ensure the fund's close  tracking  with its
benchmark. We added to the fund's

[line graph - data below]

           TARGET 2005: SHARE PRICE VS. ANTICIPATED VALUE AT MATURITY

             Actual Share Price            Anticipated Value at Maturity
                 (Historical)                  (Estimated Share Price)

1987                21.28                               94.59
1988                24.36                               93.66
1989                30.18                               93.14
1990                31.26                               97.25
1991                37.97                               99.29
1992               41.597                              99.625
1993               50.575                              100.087
1994               46.066                              100.516
1995               61.108                              100.34
1996               57.829                              100.707
1997
1998
1999
2000
2001
2002
2003
2004
2005                                                   100.00

The top line in the graph  represents the fund's  Anticipated  Value at Maturity
(AVM),  which has a target of $100 but  fluctuates  from day to day based on the
fund's expected  maturity date. The bottom line represents the fund's historical
share price, which is managed to grow over time to reach the fund's AVM.

While this graph  demonstrates  the fund's  expected  long-term  growth pattern,
please  keep in mind  that  the  fund  may  experience  significant  share-price
volatility over the short term.

Past performance is no guarantee of future results. Even if fund shares are held
to maturity,  there is no  guarantee  that the fund's share price will reach its
AVM. For more information, please consult the prospectus.


10   Target Maturities Trust: 2005                  American Century Investments


                         TARGET MATURITIES TRUST: 2005



position  in  REFCORPs  by selling  STRIPS and using the  proceeds  to  purchase
REFCORP zeros maturing in October 2005. These transactions  resulted in a higher
anticipated growth rate (AGR) and anticipated value at maturity (AVM), improving
the fund's returns.

We  continue  working to keep the  fund's  transaction  costs  down by  limiting
turnover.  To  accomplish  this we use the  inflows  and  outflows  of cash that
typically occur as opportunities to buy or sell securities, adjusting the fund's
average maturity at the same time.

LOOKING  AHEAD,  WHAT IS YOUR OUTLOOK FOR THE TREASURY  MARKET OVER THE NEXT SIX
MONTHS?

Bond yields rose dramatically in the first quarter of 1997,  largely because the
U.S.  economy has shown  faster-than-normal  growth and wages have been  rising.
These factors also led the Federal Reserve to raise short-term interest rates in
March.  The Fed appears to be in a  rate-raising  mode; our only question is how
high rates will go.

Historically,  the  average  Fed  "tightening  cycle"--a  series of  consecutive
short-term interest rate increases designed to restrain economic growth and head
off  inflation--consisted  of four  rate  hikes  totaling  200  basis  points (2
percentage  points).  That  magnitude of  tightening  seems  unlikely  this time
around,  especially  because rising wage pressures have not  materialized in the
consumer inflation figures.  In addition,  the rise in bond yields over the past
few months may already be enough to slow economic activity and keep inflation at
bay. Overall, we believe that this will be a mild Fed tightening cycle.

Nevertheless,  the bond market has already  priced in another Fed rate increase,
even though inflation remained tame in the first quarter of 1997.

WHAT IS YOUR STRATEGY GOING FORWARD?

To help the fund reach its AVM,  we will likely  continue  to keep its  maturity
date close to the November 15, 2005 maturity of its benchmark.  In addition,  we
will continue looking for  opportunities to improve the fund's liquidity and add
yield by swapping some of our receipt zeros (such as the fund's  callable  CATS,
which can be combined with STRIPS to  reconstitute  Treasurys) for REFCORPs.  We
will likely continue using STRIPS to meet the fund's cash flow needs.

[pie charts]

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 3/31/97)  
REFCORPs 43% 
STRIPS 36%
CATS 9% 
TRs 6% 
Other 6%

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 9/30/96)
STRIPS 47%
REFCORPs 33%
CATS 8%
TRs 6%
Other 6%


Semiannual Report                             Target Maturities Trust: 2005   11


                            SCHEDULE OF INVESTMENTS
                         TARGET MATURITIES TRUST: 2005

MARCH 31, 1997 (UNAUDITED)

Principal Amount                                                      Value
- --------------------------------------------------------------------------------

ZERO-COUPON U.S. TREASURY SECURITIES(1)
$    87,000   ETR, 7.13%, 11/15/04                           $       51,006
    693,750   PHYSICAL-- COUPON, 7.16%,
                11/15/04                                            405,837
     27,000   TIGR, 7.06%, 11/15/04                                  15,911
 11,500,000   REFCORP STRIPS -- COUPON,
                7.11%, 1/15/05                                    6,673,105
 15,000,000   STRIPS-- COUPON, 6.99%,
                2/15/05                                           8,731,500
  3,200,000   U.S. Treasury Corpus, 7.24%,
                2/15/10, Call Date 2/15/05                        1,827,648
  4,615,672   CUBES, 7.09%, 5/15/05                               2,621,148
  1,000,000   ETR, 7.16%, 5/15/05                                   564,770
 17,144,000   STRIPS -- COUPON, 7.01%,
                5/15/05                                           9,796,939
 28,559,000   STRIPS-- PRINCIPAL, 7.045%,
                5/15/05                                          16,275,489
    428,750   TBR, 7.17%, 5/15/05                                   241,957
  6,450,000   TR, 7.17%, 5/15/10, Call Date
                5/15/05                                           3,639,929
 12,500,000   REFCORP STRIPS-- COUPON,
                7.14%, 7/15/05                                    6,987,625
 56,500,000   STRIPS-- PRINCIPAL, 7.02%,
                8/15/05                                          31,701,020
 40,000,000   REFCORP STRIPS-- COUPON,
                7.14%, 10/15/05                                  21,974,000
    170,000   CATS, 7.105%, 11/15/05                                 93,118
    491,519   CUBES, 7.115%, 11/15/05                               269,008
  2,247,000   TBR, 7.195%, 11/15/05                               1,221,604
 10,900,000   U.S. Treasury Corpus, 7.285%,
                11/15/10, Call Date 11/15/05                      5,881,749
 46,429,000   REFCORP STRIPS-- COUPON,
                7.19%, 1/15/06                                   24,953,730
 24,556,000   STRIPS-- COUPON, 7.05%,
                2/15/06                                          13,276,447
 19,415,340   TR, 7.13%, 2/15/06                                 10,425,455
 56,800,000   REFCORP STRIPS -- COUPON,
                7.20%, 4/15/06                                   29,970,520
    107,000   CATS, 7.13%, 5/15/06                                   56,475
 38,699,000   CATS, 7.22%, 5/15/11, Call Date
                5/15/06                                          20,263,957
    566,500   CUBES, 7.14%, 5/15/06                                 298,733
  4,718,000   STRIPS -- COUPON, 7.06%,
                5/15/06                                           2,505,541

Principal Amount                                                      Value
- --------------------------------------------------------------------------------

$   410,000   TBR, 7.22%, 5/15/06                           $       214,688
    146,346   TR, 7.14%, 5/15/06                                     77,173
  1,000,000   TR, 7.22%,  5/15/11, Call Date
                5/15/06                                             523,630
 11,428,000   REFCORP STRIPS-- COUPON,
                7.21%, 7/15/06                                    5,918,218
  2,000,000   STRIPS-- COUPON, 7.065%,
                8/15/06                                           1,043,080
  1,299,780   TR, 7.145%, 8/15/06                                   673,000
  8,100,000   REFCORP STRIPS -- COUPON,
              7.24%, 10/15/06                                     4,110,264
                                                                 ----------
TOTAL INVESTMENT SECURITIES--100.0%                            $233,284,274
   (Cost $231,667,160)                                         ============

Notes to Schedule of Investments
CATS = Certificates of Accrual of Treasury Securities
CUBES = Coupons Under Book Entry Safekeeping
ETR = Easy Growth Treasury Receipts
REFCORP = Resolution Funding Corporation
PHYSICAL = U.S. Treasury Bearer Bond Coupons and Corpus
STRIPS = Separate Trading of Registered Interest and Principal of Securities 
TBR = Treasury Bond Receipts  
TIGR = Treasury Investment Growth Receipts  
TR = Treasury Receipts  
(1)  The  effective  yield to  maturity at March 31,  1997 is  indicated.  These
     securities  are  purchased at a  substantial  discount  from their value at
     maturity.

See Notes to Financial Statements


12   Target Maturities Trust: 2005                  American Century Investments

<TABLE>
<CAPTION>
                         TARGET MATURITIES TRUST: 2010

                                                                        AVERAGE ANNUAL RETURNS
                                                           -------------------------------------------------
                                            6 MONTHS       1 YEAR       3 YEARS      5 YEARS        10 YEARS
TOTAL RETURNS AS OF MARCH 31, 1997
<S>                                           <C>           <C>           <C>          <C>             <C>  
Target Maturities Trust: 2010 .............   1.37%         2.04%         8.28%        11.15%          9.48%

11/15/10 Maturity
STRIPS Issue ..............................   1.37%         2.37%         8.96%        11.65%         10.12%
Merrill Lynch Long-Term
Treasury Index ............................   1.48%         2.83%         7.20%         8.78%          8.83%

 See pages 44-45 for more information about returns, the comparative index and
                             the fund's benchmark.
</TABLE>

[mountain graph - data below]

GROWTH OF $10,000 OVER TEN YEARS

Value on 3/31/97

$10,000 investment made 3/31/87

            Target: 2010  11/15/10 STRIPS Issue   Merrill Lynch Long-Term Index

Mar-87        $10,000           $10,000                   $10,000
Apr-87         $9,029            $9,074                    $9,581
May-87         $8,708            $8,794                    $9,496
Jun-87         $8,713            $8,862                    $9,606
Jul-87         $8,231            $8,296                    $9,424
Aug-87         $7,863            $7,909                    $9,270
Sep-87         $6,921            $7,029                    $8,857
Oct-87         $8,156            $8,228                    $9,508
Nov-87         $8,214            $8,239                    $9,512
Dec-87         $8,593            $8,637                    $9,702
Jan-88         $9,563            $9,851                   $10,288
Feb-88         $9,839           $10,010                   $10,415
Mar-88         $8,874            $9,146                   $10,092
Apr-88         $8,570            $8,672                    $9,929
May-88         $8,173            $8,375                    $9,755
Jun-88         $9,018            $9,292                   $10,166
Jul-88         $8,524            $8,686                    $9,974
Aug-88         $8,547            $8,741                   $10,012
Sep-88         $9,225            $9,444                   $10,390
Oct-88         $9,805           $10,117                   $10,696
Nov-88         $9,420            $9,729                   $10,462
Dec-88         $9,943           $10,029                   $10,595
Jan-89        $10,230           $10,581                   $10,809
Feb-89         $9,673           $10,008                   $10,592
Mar-89         $9,902           $10,230                   $10,705
Apr-89        $10,247           $10,624                   $10,956
May-89        $11,034           $11,436                   $11,392
Jun-89        $12,240           $12,759                   $12,038
Jul-89        $12,384           $12,845                   $12,312
Aug-89        $11,809           $12,189                   $11,985
Sep-89        $11,827           $12,294                   $12,030
Oct-89        $12,642           $13,183                   $12,513
Nov-89        $12,820           $13,322                   $12,615
Dec-89        $12,728           $13,271                   $12,597
Jan-90        $11,603           $12,025                   $12,168
Feb-90        $11,436           $11,912                   $12,115
Mar-90        $11,344           $11,830                   $12,084
Apr-90        $10,758           $11,102                   $11,774
May-90        $11,677           $12,338                   $12,324
Jun-90        $12,137           $12,865                   $12,605
Jul-90        $12,062           $12,858                   $12,734
Aug-90        $10,856           $11,286                   $12,183
Sep-90        $11,017           $11,540                   $12,339
Oct-90        $11,384           $11,881                   $12,614
Nov-90        $12,430           $12,968                   $13,137
Dec-90        $12,763           $13,312                   $13,411
Jan-91        $12,964           $13,406                   $13,563
Feb-91        $12,952           $13,264                   $13,616
Mar-91        $12,970           $13,352                   $13,660
Apr-91        $13,142           $13,603                   $13,841
May-91        $13,079           $13,446                   $13,840
Jun-91        $12,780           $13,185                   $13,731
Jul-91        $12,998           $13,460                   $13,932
Aug-91        $13,779           $14,246                   $14,418
Sep-91        $14,406           $14,965                   $14,868
Oct-91        $14,291           $14,848                   $14,916
Nov-91        $14,176           $14,674                   $14,988
Dec-91        $15,451           $16,036                   $15,883
Jan-92        $14,756           $15,318                   $15,367
Feb-92        $14,859           $15,412                   $15,476
Mar-92        $14,578           $15,110                   $15,306
Apr-92        $14,354           $14,864                   $15,311
May-92        $14,997           $15,529                   $15,714
Jun-92        $15,078           $15,584                   $15,939
Jul-92        $16,014           $16,542                   $16,590
Aug-92        $16,083           $16,594                   $16,731
Sep-92        $16,387           $16,906                   $16,987
Oct-92        $15,991           $16,491                   $16,649
Nov-92        $16,198           $16,746                   $16,700
Dec-92        $16,962           $17,539                   $17,144
Jan-93        $17,490           $18,074                   $17,652
Feb-93        $18,484           $19,134                   $18,237
Mar-93        $18,409           $19,097                   $18,286
Apr-93        $18,587           $19,212                   $18,420
May-93        $18,731           $19,385                   $18,488
Jun-93        $20,132           $20,867                   $19,265
Jul-93        $20,850           $21,626                   $19,562
Aug-93        $21,890           $22,716                   $20,347
Sep-93        $21,895           $22,761                   $20,437
Oct-93        $22,177           $23,106                   $20,563
Nov-93        $21,321           $22,193                   $20,039
Dec-93        $21,419           $22,302                   $20,099
Jan-94        $22,303           $23,226                   $20,587
Feb-94        $20,752           $21,600                   $19,727
Mar-94        $19,477           $20,263                   $18,922
Apr-94        $19,150           $19,837                   $18,632
May-94        $18,811           $19,515                   $18,542
Jun-94        $18,524           $19,225                   $18,375
Jul-94        $19,420           $20,182                   $18,956
Aug-94        $19,121           $19,896                   $18,838
Sep-94        $18,191           $18,848                   $18,267
Oct-94        $18,041           $18,744                   $18,186
Nov-94        $18,369           $19,103                   $18,283
Dec-94        $18,943           $19,720                   $18,604
Jan-95        $19,512           $20,361                   $19,079
Feb-95        $20,149           $21,031                   $19,615
Mar-95        $20,345           $21,262                   $19,757
Apr-95        $20,821           $21,790                   $20,106
May-95        $23,153           $24,297                   $21,661
Jun-95        $23,573           $24,762                   $21,922
Jul-95        $22,964           $24,123                   $21,580
Aug-95        $23,619           $24,842                   $22,045
Sep-95        $24,204           $25,492                   $22,443
Oct-95        $25,135           $26,552                   $23,104
Nov-95        $26,008           $27,456                   $23,670
Dec-95        $26,916           $28,460                   $24,310
Jan-96        $26,766           $28,267                   $24,297
Feb-96        $24,865           $26,261                   $23,112
Mar-96        $24,233           $25,608                   $22,672
Apr-96        $23,515           $24,802                   $22,293
May-96        $23,331           $24,673                   $22,186
Jun-96        $24,015           $25,436                   $22,636
Jul-96        $24,026           $25,420                   $22,636
Aug-96        $23,555           $24,909                   $22,360
Sep-96        $24,394           $25,860                   $22,972
Oct-96        $25,653           $27,241                   $23,868
Nov-96        $26,825           $28,441                   $24,653
Dec-96        $25,964           $27,508                   $24,069
Jan-97        $25,660           $27,188                   $23,913
Feb-97        $25,632           $27,149                   $23,880
Mar-97        $24,727           $26,215                   $23,312

Past  performance  does not  guarantee  future  results.  Investment  return and
principal  value will fluctuate,  and redemption  value may be more or less than
original cost. The line representing the fund's total return includes  operating
expenses (such as transaction  costs and management  fees) that reduce  returns,
while the total return line of the index does not.


PORTFOLIO AT A GLANCE
                                     3/31/97           9/30/96
Number of Securities                   16                16
Anticipated Growth Rate               6.60%             6.44%
Weighted Average Maturity Date       9/21/10           8/29/10
Anticipated Value at Maturity        $103.20           $102.53
Expense Ratio                        0.62%*             0.67%

* Annualized.

           You will receive a proxy statement in June. Please read it
                   carefully and take part in the proxy vote.


Semiannual Report                             Target Maturities Trust: 2010   13


                         TARGET MATURITIES TRUST: 2010

Management Q & A

An interview with Dave Schroeder,  a vice president and senior portfolio manager
on the Target Maturities Trust management team.

HOW DID THE FUND PERFORM DURING THE SIX-MONTH PERIOD ENDED MARCH 31, 1997?

The fund posted a 1.37% total return for the six-month  period,  reflecting  the
unfavorable  U.S. bond market  conditions that prevailed in early 1997. (See the
Total  Returns   table  on  the  previous   page  for  other  fund   performance
comparisons.)

HOW DID THE FUND PERFORM COMPARED WITH ITS BENCHMARK?

The fund's 1.37% total return  matched that of its  benchmark,  a STRIPS  coupon
issue  maturing  on  November  15,  2010.  The  fund is  managed  to  track  the
performance of the benchmark, but it has operating expenses (such as transaction
costs and  management  fees) that the  benchmark  does not have.  But during the
six-month period,  the fund's shorter maturity helped limit the negative effects
of rising interest rates. As a result, the fund kept pace with the benchmark.

HOW DID YOU POSITION THE FUND DURING THE LAST SIX MONTHS?

By  selling  some of the fund's  Novenber  2009-maturity  STRIPS and  purchasing
STRIPS  maturing  in November  2010,  we extended  the fund's  weighted  average
maturity  (WAM) date to September 21, 2010. The fund's WAM date is now closer to
the November 15, 2010 maturity date of its  benchmark.  We also used some of the
proceeds to purchase REFCORPs

[line graph - data below]

           TARGET 2010: SHARE PRICE VS. ANTICIPATED VALUE AT MATURITY

             Actual Share Price            Anticipated Value at Maturity
                 (Historical)                  (Estimated Share Price)

1987                14.96                               95.27
1988                17.31                               97.13
1989                22.16                               96.66
1990                22.22                               97.52
1991                26.9                                98.97
1992               29.534                              100.179
1993               37.292                              100.874
1994               32.981                              101.78
1995               46.864                              101.788
1996               42.474                              102.529
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010                                                   100.00

The top line in the graph  represents the fund's  Anticipated  Value at Maturity
(AVM),  which has a target of $100 but  fluctuates  from day to day based on the
fund's expected  maturity date. The bottom line represents the fund's historical
share price, which is managed to grow over time to reach the fund's AVM.

While this graph  demonstrates  the fund's  expected  long-term  growth pattern,
please  keep in mind  that  the  fund  may  experience  significant  share-price
volatility over the short term.

Past performance is no guarantee of future results. Even if fund shares are held
to maturity,  there is no  guarantee  that the fund's share price will reach its
AVM. For more information, please consult the prospectus.


14   Target Maturities Trust: 2010                  American Century Investments


                         TARGET MATURITIES TRUST: 2010

maturing in October 2010,  which helped increase the fund's  anticipated  growth
rate (AGR) and anticipated value at maturity (AVM).

Over the past six months,  we  continued  to bring the fund's WAM date closer to
the maturity date of its benchmark  while keeping the fund's  transaction  costs
down.  By using  the  inflows  and  outflows  of cash  that  typically  occur as
opportunities to buy or sell  securities,  we reduced fund turnover and adjusted
the fund's WAM in the process.

LOOKING  AHEAD,  WHAT IS YOUR OUTLOOK FOR THE TREASURY  MARKET OVER THE NEXT SIX
MONTHS?

Bond yields rose dramatically in the first quarter of 1997,  largely because the
U.S.  economy has shown  faster-than-normal  growth and wages have been  rising.
These factors also led the Federal Reserve to raise short-term interest rates in
March.  The Fed appears to be in a  rate-raising  mode; our only question is how
high rates will go.

Historically,  the  average  Fed  "tightening  cycle"--a  series of  consecutive
short-term interest rate increases designed to restrain economic growth and head
off  inflation--consisted  of four  rate  hikes  totaling  200  basis  points (2
percentage  points).  That  magnitude of  tightening  seems  unlikely  this time
around,  especially  because rising wage pressures have not  materialized in the
consumer inflation figures.  In addition,  the rise in bond yields over the past
few months may already be enough to slow economic activity and keep inflation at
bay. Overall, we believe that this will be a mild Fed tightening cycle.

Nevertheless,  the bond market has already  priced in another Fed rate increase,
even though inflation remained tame in the first quarter of 1997.

WHAT IS YOUR STRATEGY GOING FORWARD?

We will  likely  maintain  the fund's  current  asset  allocation,  keeping  the
majority of the fund's assets in STRIPS and REFCORPs.  However,  we will look to
add  higher-yielding  REFCORPs when they become available at attractive  prices,
while  maintaining at least 25% of the fund's assets in STRIPS to meet liquidity
needs.  We will also continue to move the fund's WAM date closer to the maturity
date of its benchmark.

We expect to continue holding the fund's principal ETRs, which were purchased in
1993  when  their  yield  was 30 basis  points  higher  than  coupon  STRIPS  of
comparable maturity.  These securities have appreciated in price, but they still
offer a yield that is 23 basis points more than like-maturity STRIPS. Should the
custody  bank for ETRs  change  their  custody  agreement  and allow  ETRs to be
reconstituted  with STRIPS,  we would expect our principal ETRs to appreciate in
value relative to STRIPS.

[pie charts]

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 3/31/97)  
REFCORPs 44% 
STRIPS 44%
ETRs 12%

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 9/30/96)
STRIPS 57%
REFCORPs 33%
ETRs 10%


Semiannual Report                             Target Maturities Trust: 2010   15


                            SCHEDULE OF INVESTMENTS
                         TARGET MATURITIES TRUST: 2010

MARCH 31, 1997 (UNAUDITED)

Principal Amount                                                      Value
- --------------------------------------------------------------------------------

ZERO-COUPON U.S. TREASURY SECURITIES(1)
$28,520,000   ETR, 7.395%, 5/15/14, Call Date
                5/15/09                                       $  11,826,959
  2,000,000   REFCORP STRIPS-- COUPON,
                7.34%, 10/15/09                                     810,020
 11,500,000   STRIPS-- PRINCIPAL, 7.305%,
                11/15/14, Call Date 11/15/09                      4,649,565
  5,772,000   REFCORP STRIPS-- COUPON,
                7.35%, 1/15/10                                    2,292,869
 30,728,000   REFCORP STRIPS-- COUPON,
                7.36%, 4/15/10                                   11,974,394
    587,000   STRIPS-- COUPON, 7.22%,
                5/15/10                                             231,448
 15,000,000   REFCORP STRIPS-- COUPON,
                7.37%, 7/15/10                                    5,732,700
  3,277,000   STRIPS-- COUPON, 7.235%,
                8/15/10                                           1,266,528
 25,000,000   REFCORP STRIPS-- COUPON,
                7.37%, 10/15/10                                   9,384,250
 28,200,000   STRIPS-- COUPON, 7.245%,
                11/15/10                                         10,696,260
 20,500,000   REFCORP STRIPS-- COUPON,
                7.37%, 1/15/11                                    7,556,300
 29,860,000   STRIPS-- COUPON, 7.255%,
                2/15/11                                          11,107,920
 18,850,000   REFCORP STRIPS-- COUPON,
                7.37%, 4/15/11                                    6,824,266
 10,000,000   STRIPS-- COUPON, 7.26%,
                5/15/11                                           3,652,900
  8,715,000   STRIPS-- COUPON, 7.275%,
                8/15/11                                           3,119,884
 26,000,000   STRIPS-- COUPON, 7.285%,
                11/15/11                                          9,132,760
                                                                 ----------
TOTAL INVESTMENT SECURITIES--100.0%                            $100,259,023
  (Cost $100,341,650)                                          ============

Notes to Schedule of Investments
ETR = Easy Growth Treasury Receipts
REFCORP = Resolution Funding Corporation
STRIPS = Separate Trading of Registered Interest and Principal of Securities 
(1)  The  effective  yield to  maturity at March 31,  1997 is  indicated.  These
     securities  are  purchased at a  substantial  discount  from their value at
     maturity.

See Notes to Financial Statements


16 Target Maturities Trust: 2010                    American Century Investments

<TABLE>
<CAPTION>
                         TARGET MATURITIES TRUST: 2015

                                                                        AVERAGE ANNUAL RETURNS
                                                           --------------------------------------------------
                                            6 MONTHS       1 YEAR        3 YEARS       5 YEARS       10 YEARS
TOTAL RETURNS AS OF MARCH 31, 1997
<S>                                           <C>           <C>           <C>          <C>             <C>  
Target Maturities Trust: 2015 .............   0.97%         1.70%         8.43%        11.54%          8.66%
11/15/15 Maturity
STRIPS Issue ..............................   0.85%         1.93%         8.98%        12.11%          9.13%
Merrill Lynch Long-Term
Treasury Index ............................   1.48%         2.83%         7.20%         8.78%          8.83%

 See pages 44-45 for more information about returns, the comparative index and
                             the fund's benchmark.
</TABLE>

[mountain graph - data below]

GROWTH OF $10,000 OVER TEN YEARS

Value on 3/31/97

$10,000 investment made 3/31/87

            Target: 2015   11/15/15 STRIPS Issue   Merrill Lynch Long-Term Index

Mar-87        $10,000            $10,000                   $10,000
Apr-87         $9,111             $8,969                    $9,581
May-87         $8,521             $8,524                    $9,496
Jun-87         $8,329             $8,657                    $9,606
Jul-87         $7,895             $7,972                    $9,424
Aug-87         $7,411             $7,427                    $9,270
Sep-87         $6,422             $6,683                    $8,857
Oct-87         $7,568             $7,496                    $9,508
Nov-87         $7,674             $7,553                    $9,512
Dec-87         $8,087             $8,049                    $9,702
Jan-88         $9,282             $9,113                   $10,288
Feb-88         $9,545             $9,577                   $10,415
Mar-88         $8,471             $8,537                   $10,092
Apr-88         $7,959             $8,111                    $9,929
May-88         $7,568             $7,555                    $9,755
Jun-88         $8,286             $8,386                   $10,166
Jul-88         $7,703             $7,667                    $9,974
Aug-88         $7,603             $7,651                   $10,012
Sep-88         $8,336             $8,441                   $10,390
Oct-88         $9,011             $9,144                   $10,696
Nov-88         $8,421             $8,544                   $10,462
Dec-88         $8,983             $8,945                   $10,595
Jan-89         $9,282             $9,512                   $10,809
Feb-89         $8,855             $8,981                   $10,592
Mar-89         $9,104             $9,211                   $10,705
Apr-89         $9,289             $9,463                   $10,956
May-89        $10,135            $10,264                   $11,392
Jun-89        $11,600            $11,820                   $12,038
Jul-89        $11,778            $12,019                   $12,312
Aug-89        $11,145            $11,332                   $11,985
Sep-89        $11,110            $11,347                   $12,030
Oct-89        $11,899            $12,349                   $12,513
Nov-89        $12,176            $12,459                   $12,615
Dec-89        $11,991            $12,257                   $12,597
Jan-90        $10,818            $11,124                   $12,168
Feb-90        $10,669            $10,841                   $12,115
Mar-90        $10,427            $10,624                   $12,084
Apr-90         $9,587             $9,775                   $11,774
May-90        $10,718            $10,884                   $12,324
Jun-90        $11,138            $11,392                   $12,605
Jul-90        $11,145            $11,391                   $12,734
Aug-90         $9,666             $9,829                   $12,183
Sep-90         $9,780             $9,967                   $12,339
Oct-90        $10,171            $10,465                   $12,614
Nov-90        $11,238            $11,488                   $13,137
Dec-90        $11,586            $11,793                   $13,411
Jan-91        $11,821            $12,075                   $13,563
Feb-91        $11,721            $12,037                   $13,616
Mar-91        $11,735            $12,030                   $13,660
Apr-91        $11,935            $12,319                   $13,841
May-91        $11,764            $11,976                   $13,840
Jun-91        $11,408            $11,665                   $13,731
Jul-91        $11,664            $12,004                   $13,932
Aug-91        $12,518            $12,750                   $14,418
Sep-91        $13,115            $13,417                   $14,868
Oct-91        $12,909            $13,200                   $14,916
Nov-91        $12,639            $12,864                   $14,988
Dec-91        $14,189            $14,465                   $15,883
Jan-92        $13,385            $13,627                   $15,367
Feb-92        $13,549            $13,805                   $15,476
Mar-92        $13,293            $13,529                   $15,306
Apr-92        $13,023            $13,285                   $15,311
May-92        $13,663            $13,957                   $15,714
Jun-92        $13,570            $13,837                   $15,939
Jul-92        $14,680            $15,001                   $16,590
Aug-92        $14,523            $14,833                   $16,731
Sep-92        $14,502            $14,830                   $16,987
Oct-92        $14,104            $14,407                   $16,649
Nov-92        $14,680            $14,994                   $16,700
Dec-92        $15,292            $15,636                   $17,144
Jan-93        $15,818            $16,188                   $17,652
Feb-93        $16,714            $17,123                   $18,237
Mar-93        $16,565            $16,977                   $18,286
Apr-93        $16,707            $17,119                   $18,420
May-93        $17,063            $17,481                   $18,488
Jun-93        $18,272            $18,734                   $19,265
Jul-93        $19,211            $19,716                   $19,562
Aug-93        $20,832            $21,430                   $20,347
Sep-93        $20,654            $21,248                   $20,437
Oct-93        $21,024            $21,636                   $20,563
Nov-93        $20,085            $20,636                   $20,039
Dec-93        $19,957            $20,559                   $20,099
Jan-94        $20,768            $21,411                   $20,587
Feb-94        $19,232            $19,831                   $19,727
Mar-94        $18,001            $18,507                   $18,922
Apr-94        $17,553            $18,065                   $18,632
May-94        $17,034            $17,540                   $18,542
Jun-94        $16,700            $17,186                   $18,375
Jul-94        $17,859            $18,409                   $18,956
Aug-94        $17,255            $17,776                   $18,838
Sep-94        $16,209            $16,663                   $18,267
Oct-94        $16,152            $16,609                   $18,186
Nov-94        $16,572            $17,044                   $18,283
Dec-94        $17,148            $17,663                   $18,604
Jan-95        $17,802            $18,383                   $19,079
Feb-95        $18,286            $18,846                   $19,615
Mar-95        $18,606            $19,196                   $19,757
Apr-95        $18,954            $19,617                   $20,106
May-95        $21,714            $22,521                   $21,661
Jun-95        $22,006            $22,805                   $21,922
Jul-95        $21,252            $22,035                   $21,580
Aug-95        $22,233            $23,073                   $22,045
Sep-95        $22,902            $23,770                   $22,443
Oct-95        $24,125            $25,098                   $23,104
Nov-95        $25,036            $26,000                   $23,670
Dec-95        $26,188            $27,211                   $24,310
Jan-96        $25,882            $26,894                   $24,297
Feb-96        $23,478            $24,451                   $23,112
Mar-96        $22,568            $23,504                   $22,672
Apr-96        $21,871            $22,758                   $22,293
May-96        $21,821            $22,725                   $22,186
Jun-96        $22,504            $23,501                   $22,636
Jul-96        $22,511            $23,433                   $22,636
Aug-96        $21,757            $22,670                   $22,360
Sep-96        $22,731            $23,756                   $22,972
Oct-96        $24,245            $25,395                   $23,868
Nov-96        $25,717            $26,779                   $24,653
Dec-96        $24,609            $25,685                   $24,069
Jan-97        $24,082            $25,185                   $23,913
Feb-97        $24,082            $25,136                   $23,880
Mar-97        $22,952            $23,958                   $23,312

Past  performance  does not  guarantee  future  results.  Investment  return and
principal  value will fluctuate,  and redemption  value may be more or less than
original cost. The line representing the fund's total return includes  operating
expenses (such as transaction  costs and management  fees) that reduce  returns,
while the total return line of the index does not.

PORTFOLIO AT A GLANCE
                                     3/31/97           9/30/96
Number of Securities                   12                12
Anticipated Growth Rate               6.71%             6.58%
Weighted Average Maturity Date      11/13/15          11/12/15
Anticipated Value at Maturity        $110.34           $110.11
Expense Ratio                        0.62%*             0.65%

* Annualized.

           You will receive a proxy statement in June. Please read it
                   carefully and take part in the proxy vote.


Semiannual Report                             Target Maturities Trust: 2015   17


                         TARGET MATURITIES TRUST: 2015

Management Q & A

An interview with Dave Schroeder,  a vice president and senior portfolio manager
on the Target Maturities Trust management team.

HOW DID THE FUND PERFORM DURING THE SIX-MONTH PERIOD ENDED MARCH 31, 1997?

Reflecting the unfavorable  U.S. bond market  conditions that prevailed in early
1997,  the  fund  posted  a  0.97%  total  return  for  the  six-month   period.
Nevertheless,  the fund's return was 12 basis points higher than the 0.85% total
return of its  benchmark,  a coupon STRIPS issue  maturing on November 15, 2015.
(See the Total  Returns  table on the previous  page for other fund  performance
comparisons.)

HOW DID YOU POSITION THE FUND DURING THE LAST SIX MONTHS?

We kept the fund's  weighted  average  maturity (WAM) date close to the November
15, 2015  maturity  date of its  benchmark.  Because of the  volatility  in bond
prices caused by shifting interest rate expectations (see the Period Overview on
page 4), we sold STRIPS maturing in November 2015 to meet cash outflow needs.

The fund now holds  fewer  STRIPS,  which  increased  its  anticipated  value at
maturity (AVM) and anticipated growth rate (AGR) and improved the fund's return.
We sold STRIPS instead of REFCORPs  mainly because  REFCORPs  offered more yield
and higher potential returns than STRIPS in this maturity

[line graph - data below]

           TARGET 2015: SHARE PRICE VS. ANTICIPATED VALUE AT MATURITY

             Actual Share Price            Anticipated Value at Maturity
                 (Historical)                  (Estimated Share Price)

1987                11.37                              102.86
1988                12.63                              102.75
1989                16.86                              101.77
1990                16.29                              102.24
1991                19.95                              106.05
1992               21.502                              107.792
1993               28.064                              106.952
1994                24.11                              108.832
1995               36.819                              109.462
1996               31.962                              110.109
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015                                                   100.00

The top line in the graph  represents the fund's  Anticipated  Value at Maturity
(AVM),  which has a target of $100 but  fluctuates  from day to day based on the
fund's expected  maturity date. The bottom line represents the fund's historical
share price, which is managed to grow over time to reach the fund's AVM.

While this graph  demonstrates  the fund's  expected  long-term  growth pattern,
please  keep in mind  that  the  fund  may  experience  significant  share-price
volatility over the short term.

Past performance is no guarantee of future results. Even if fund shares are held
to maturity,  there is no  guarantee  that the fund's share price will reach its
AVM. For more information, please consult the prospectus.


18   Target Maturities Trust: 2015                  American Century Investments


                         TARGET MATURITIES TRUST: 2015

sector.  As  mentioned in our  previous  report,  the fund holds only STRIPS and
REFCORPs--the only types of zeros available in this maturity sector.

LOOKING  AHEAD,  WHAT IS YOUR OUTLOOK FOR THE TREASURY  MARKET OVER THE NEXT SIX
MONTHS?

Bond yields rose dramatically in the first quarter of 1997,  largely because the
U.S.  economy has shown  faster-than-normal  growth and wages have been  rising.
These factors also led the Federal Reserve to raise short-term interest rates in
March.  The Fed appears to be in a  rate-raising  mode; our only question is how
high rates will go.

Historically,  the  average  Fed  "tightening  cycle"--a  series of  consecutive
short-term interest rate increases designed to restrain economic growth and head
off  inflation--consisted  of four  rate  hikes  totaling  200  basis  points (2
percentage  points).  That  magnitude of  tightening  seems  unlikely  this time
around,  especially  because rising wage pressures have not  materialized in the
consumer inflation figures.  In addition,  the rise in bond yields over the past
few months may already be enough to slow economic activity and keep inflation at
bay. Overall, we believe that this will be a mild Fed tightening cycle.

Nevertheless,  the bond market has already  priced in another Fed rate increase,
even though inflation remained tame in the first quarter of 1997.

WHAT IS YOUR STRATEGY FOR THE FUND GOING FORWARD?

To better track the performance of the fund's benchmark, we will likely continue
moving the fund's WAM date  closer to  November  15,  2015.  We will also likely
maintain the fund's current asset  allocation  for the time being,  with roughly
50% of its assets  invested in REFCORPs and the other 50% in STRIPS.  As always,
we will  continue to monitor the relative  values of coupon STRIPS and principal
STRIPS, shifting the fund's assets toward the more attractively priced sector.

Currently,  all of the fund's zeros are coupon zeros. With coupon zeros yielding
more than  principal  zeros in this maturity  sector,  we prefer  holding coupon
zeros.  The relative values of coupon and principal zeros in the fund's maturity
sector are based on several  factors,  including  (1) the level of  stripping or
reconstitution  activity in the Treasury market; (2) the value of the underlying
Treasury bonds maturing in 2014-2016 compared to other maturity sectors; and (3)
dealer and investor  activity in the fund's maturity sector. We focus on each of
these factors when tracking the relative values of coupon and principal zeros.

[pie charts]

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 3/31/97)
STRIPS 50%
REFCORPs 50%

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 9/30/96)
STRIPS 56%
REFCORPs 44%


Semiannual Report                             Target Maturities Trust: 2015   19


                            SCHEDULE OF INVESTMENTS
                         TARGET MATURITIES TRUST: 2015

MARCH 31, 1997 (UNAUDITED)

Principal Amount                                                      Value
- -------------------------------------------------------------------------------

ZERO-COUPON U.S. TREASURY SECURITIES(1)
$ 4,350,000   STRIPS -- COUPON, 7.36%,
                2/15/15                                      $    1,195,032
 35,440,000   REFCORP STRIPS-- COUPON,
                7.50%, 4/15/15                                    9,390,537
 39,408,000   STRIPS-- COUPON, 7.36%,
                5/15/15                                          10,635,431
 29,644,000   REFCORP STRIPS-- COUPON,
                7.51%, 7/15/15                                    7,697,065
 48,550,000   STRIPS-- COUPON, 7.37%,
                8/15/15                                          12,841,475
 48,421,000   REFCORP STRIPS-- COUPON,
                7.50%, 10/15/15                                  12,366,239
 49,308,000   STRIPS-- COUPON, 7.37%,
                11/15/15                                         12,811,698
 36,300,000   STRIPS-- COUPON, 7.37%,
                2/15/16                                           9,259,767
 44,788,000   REFCORP STRIPS-- COUPON,
                7.52%, 4/15/16                                   10,984,705
 17,700,000   STRIPS-- COUPON, 7.37%,
                5/15/16                                           4,435,620
 25,000,000   REFCORP STRIPS-- COUPON,
                7.52%, 7/15/16                                    6,018,750
 23,000,000   REFCORP STRIPS-- COUPON,
                7.53%, 10/15/16                                   5,426,390
                                                                -----------
TOTAL INVESTMENT SECURITIES--100.0%                            $103,062,709
   (Cost $84,601,170)                                          ============

Notes to Schedule of Investments
REFCORP = Resolution Funding Corporation
STRIPS = Separate Trading of Registered Interest and Principal of Securities 
(1)  The  effective  yield to  maturity at March 31,  1997 is  indicated.  These
     securities  are  purchased at a  substantial  discount  from their value at
     maturity.

See Notes to Financial Statements


20   Target Maturities Trust: 2015                  American Century Investments
<TABLE>
<CAPTION>
                         TARGET MATURITIES TRUST: 2020
                                                                        AVERAGE ANNUAL RETURNS
                                           6 MONTHS        1 YEAR        3 YEARS       5 YEARS    LIFE OF FUND
TOTAL RETURNS AS OF MARCH 31, 1997
<S>                                          <C>            <C>           <C>          <C>           <C>  
Target Maturities Trust: 2020 .............  0.50%          1.01%         8.29%        11.71%        8.79%
Fund
Benchmark(1) ..............................  0.35%          1.39%         8.82%        12.06%        8.13%(2)
Merrill Lynch Long-Term
Treasury Index ............................  1.48%          2.83%         7.20%         8.78%        8.86%(2)

(1)  From December 1989 through April 1990,  the fund's  benchmark was a 8/15/19
     STRIPS issue;  from May 1990 through October 1991, it was a 11/15/19 STRIPS
     issue; and from November 1991 to the present, it has been a 11/15/20 STRIPS
     issue.

(2)  Returns since December 31, 1989, the date nearest the fund's  inception for
     which data are available. Inception date was December 29, 1989.
</TABLE>

See pages 44-45 for more information  about returns,  the comparative  index and
the fund's benchmark.

[mountain graph - data below]

GROWTH OF $10,000 OVER THE LIFE OF THE FUND

Value on 3/31/97

$10,000 investment made 12/31/89

            Target: 2020       Fund Benchmark     Merrill Lynch Long-Term Index

Dec-89        $10,000             $10,000                   $10,000
Jan-90         $9,083              $9,063                    $9,659
Feb-90         $8,767              $8,518                    $9,617
Mar-90         $8,658              $8,407                    $9,593
Apr-90         $7,967              $7,781                    $9,346
May-90         $8,917              $8,351                    $9,783
Jun-90         $9,258              $8,818                   $10,006
Jul-90         $9,308              $9,237                   $10,108
Aug-90         $7,950              $7,837                    $9,671
Sep-90         $8,025              $7,976                    $9,795
Oct-90         $8,458              $8,356                   $10,013
Nov-90         $9,275              $8,845                   $10,429
Dec-90         $9,550              $9,080                   $10,646
Jan-91         $9,800              $9,373                   $10,766
Feb-91         $9,850              $9,275                   $10,809
Mar-91         $9,717              $9,257                   $10,844
Apr-91         $9,808              $9,399                   $10,987
May-91         $9,633              $9,133                   $10,986
Jun-91         $9,208              $8,774                   $10,900
Jul-91         $9,458              $9,058                   $11,059
Aug-91        $10,117              $9,601                   $11,446
Sep-91        $10,450             $10,012                   $11,803
Oct-91        $10,117              $9,551                   $11,841
Nov-91         $9,792              $9,257                   $11,898
Dec-91        $11,208             $10,623                   $12,608
Jan-92        $10,558             $10,005                   $12,199
Feb-92        $10,742             $10,094                   $12,285
Mar-92        $10,592              $9,970                   $12,150
Apr-92        $10,408              $9,818                   $12,154
May-92        $10,942             $10,295                   $12,474
Jun-92        $10,842             $10,226                   $12,653
Jul-92        $11,708             $11,110                   $13,170
Aug-92        $11,533             $10,884                   $13,281
Sep-92        $11,358             $10,690                   $13,485
Oct-92        $10,925             $10,305                   $13,217
Nov-92        $11,508             $10,861                   $13,257
Dec-92        $12,142             $11,474                   $13,609
Jan-93        $12,675             $11,985                   $14,013
Feb-93        $13,383             $12,716                   $14,477
Mar-93        $13,358             $12,631                   $14,516
Apr-93        $13,300             $12,608                   $14,622
May-93        $13,708             $12,951                   $14,676
Jun-93        $14,692             $13,854                   $15,293
Jul-93        $15,775             $14,963                   $15,529
Aug-93        $17,542             $16,680                   $16,152
Sep-93        $17,267             $16,421                   $16,223
Oct-93        $17,583             $16,769                   $16,324
Nov-93        $16,625             $15,862                   $15,907
Dec-93        $16,467             $15,625                   $15,955
Jan-94        $17,100             $16,254                   $16,342
Feb-94        $15,800             $14,984                   $15,660
Mar-94        $14,508             $13,672                   $15,021
Apr-94        $14,142             $13,354                   $14,790
May-94        $13,750             $12,955                   $14,719
Jun-94        $13,375             $12,613                   $14,587
Jul-94        $14,417             $13,623                   $15,048
Aug-94        $13,767             $12,992                   $14,954
Sep-94        $12,733             $11,974                   $14,501
Oct-94        $12,608             $11,832                   $14,437
Nov-94        $12,992             $12,212                   $14,513
Dec-94        $13,558             $12,775                   $14,768
Jan-95        $14,175             $13,401                   $15,146
Feb-95        $14,533             $13,750                   $15,571
Mar-95        $14,767             $13,925                   $15,684
Apr-95        $15,075             $14,250                   $15,961
May-95        $17,642             $16,707                   $17,195
Jun-95        $17,933             $17,009                   $17,402
Jul-95        $17,117             $16,274                   $17,131
Aug-95        $18,008             $17,105                   $17,500
Sep-95        $18,725             $17,816                   $17,816
Oct-95        $19,917             $18,972                   $18,340
Nov-95        $20,667             $19,659                   $18,790
Dec-95        $21,875             $20,861                   $19,298
Jan-96        $21,492             $20,480                   $19,288
Feb-96        $19,067             $18,155                   $18,347
Mar-96        $18,242             $17,378                   $17,997
Apr-96        $17,583             $16,761                   $17,697
May-96        $17,608             $16,824                   $17,612
Jun-96        $18,133             $17,361                   $17,969
Jul-96        $18,150             $17,391                   $17,969
Aug-96        $17,450             $16,655                   $17,750
Sep-96        $18,333             $17,558                   $18,236
Oct-96        $19,741             $19,071                   $18,947
Nov-96        $21,107             $20,130                   $19,570
Dec-96        $20,033             $19,111                   $19,107
Jan-97        $19,408             $18,529                   $18,983
Feb-97        $19,415             $18,543                   $18,957
Mar-97        $18,425             $17,620                   $18,506

Past  performance  does not  guarantee  future  results.  Investment  return and
principal  value will fluctuate,  and redemption  value may be more or less than
original  cost.  This chart begins on 12/31/89  because that is the date nearest
the fund's  inception for which data are available.  The line  representing  the
fund's total return includes  operating  expenses (such as transaction costs and
management  fees) that reduce returns,  while the total return line of the index
does not.

PORTFOLIO AT A GLANCE
                                     3/31/97           9/30/96
Number of Securities                   19                19
Anticipated Growth Rate               6.73%             6.59%
Weighted Average Maturity Date       9/12/20           8/21/20
Anticipated Value at Maturity        $104.41           $103.60
Expense Ratio                        0.52%*             0.61%

* Annualized.

           You will receive a proxy statement in June. Please read it
                   carefully and take part in the proxy vote.


Semiannual Report                             Target Maturities Trust: 2020   21


                         TARGET MATURITIES TRUST: 2020

Management Q & A

An interview with Dave Schroeder,  a vice president and senior portfolio manager
on the Target Maturities Trust management team.

HOW DID THE FUND PERFORM DURING THE SIX-MONTH PERIOD ENDED MARCH 31, 1997?

The fund posted a 0.50% total return for the six-month  period,  reflecting  the
unfavorable  U.S. bond market  conditions that prevailed in early 1997. The fund
outperformed  the 0.35% total  return of its  benchmark,  a coupon  STRIPS issue
maturing on November 15, 2020. (See the Total Returns table on the previous page
for other fund performance  comparisons.) One of the primary reasons behind this
outperformance   was  the  fund's  shorter  average  maturity  relative  to  its
benchmark,  which insulated the fund from some of the negative effects of rising
interest rates.

HOW DID YOU POSITION THE FUND DURING THE LAST SIX MONTHS?

We extended  the fund's  weighted  average  maturity  (WAM) date from August 21,
2020,  to  September  12,  2020,  bringing  it closer to the  November  15, 2020
maturity date of its benchmark.  This shift improved the fund's ability to track
the performance of the benchmark.  The longer maturity also increased the fund's
anticipated value at maturity (AVM) and anticipated growth rate (AGR).

We also  increased  the fund's  holdings of REFCORPs (see the graphs on page 23)
because of the higher  yields that  REFCORPs  offer over  STRIPS.  REFCORPs  and
STRIPS are the only  securities held 

[line graph - data below]

           TARGET 2020: SHARE PRICE VS. ANTICIPATED VALUE AT MATURITY

             Actual Share Price            Anticipated Value at Maturity
                 (Historical)                  (Estimated Share Price)

1987
1988
1989
1990                11.46                               92.6
1991                13.45                               97.77
1992               14.575                              102.184
1993               19.765                              101.274
1994               16.273                              102.175
1995               26.245                              102.54
1996                 22                                103.598
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020                                                   100.00

The top line in the graph  represents the fund's  Anticipated  Value at Maturity
(AVM),  which has a target of $100 but  fluctuates  from day to day based on the
fund's expected  maturity date. The bottom line represents the fund's historical
share price, which is managed to grow over time to reach the fund's AVM.

While this graph  demonstrates  the fund's  expected  long-term  growth pattern,
please  keep in mind  that  the  fund  may  experience  significant  share-price
volatility over the short term.

Past performance is no guarantee of future results. Even if fund shares are held
to maturity,  there is no  guarantee  that the fund's share price will reach its
AVM. For more information, please consult the prospectus.


22   Target Maturities Trust: 2020                  American Century Investments


                         TARGET MATURITIES TRUST: 2020

in the fund because  they are the only types of  government  zeros  available in
this maturity sector.

We have also been  working to keep the fund's  transaction  costs down.  We have
reduced fund  turnover by using the inflows and outflows of cash that  typically
occur as opportunities  to buy or sell  securities,  adjusting the fund's WAM at
the same time.

WERE THERE ANY OTHER WAYS THAT YOU ATTEMPTED TO ENHANCE THE FUND'S PERFORMANCE?

Yes. We continued to make securities  loans during the last six months.  Because
of its size, the fund owns a significant percentage of the outstanding supply of
coupon  STRIPS  maturing  in 2020,  sometimes  holding as much as 30%-40% of the
available securities in the marketplace. This has made the outstanding supply of
2020 coupon STRIPS more scarce and consequently more expensive. As a result, the
fund is an attractive  source for dealers who need to borrow securities to cover
sales. Fees from securities loans have been a successful way to boost the fund's
returns.

LOOKING  AHEAD,  WHAT IS YOUR OUTLOOK FOR THE TREASURY  MARKET OVER THE NEXT SIX
MONTHS?

Bond yields rose dramatically in the first quarter of 1997,  largely because the
U.S.  economy has shown  faster-than-normal  growth and wages have been  rising.
These factors also led the Federal Reserve to raise short-term interest rates in
March.  The Fed appears to be in a  rate-raising  mode; our only question is how
high rates will go.

Historically,  the  average  Fed  "tightening  cycle"--a  series of  consecutive
short-term interest rate increases designed to restrain economic growth and head
off  inflation--consisted  of four  rate  hikes  totaling  200  basis  points (2
percentage  points).  That  magnitude of  tightening  seems  unlikely  this time
around,  especially  because rising wage pressures have not  materialized in the
consumer inflation figures.  In addition,  the rise in bond yields over the past
few months may already be enough to slow economic activity and keep inflation at
bay. Overall, we believe that this will be a mild Fed tightening cycle.

Nevertheless,  the bond market has already  priced in another Fed rate increase,
even though inflation remained tame in the first quarter of 1997.

WHAT IS YOUR STRATEGY FOR THE FUND GOING FORWARD?

We will likely continue  shifting the fund's WAM date closer to the November 15,
2020, maturity date of its benchmark.  We will also likely keep the fund's asset
mix close to its current allocation of 51% REFCORPS and 49% STRIPS. In an effort
to  enhance  returns,  we will  continue  to lend  the  fund's  securities  when
opportunities arise.

[pie charts]

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 3/31/97)
REFCORPs 51%
STRIPS 49%

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 9/30/96)
STRIPS 61%
REFCORPs 39%


Semiannual Report                             Target Maturities Trust: 2020   23


                            SCHEDULE OF INVESTMENTS
                         TARGET MATURITIES TRUST: 2020

MARCH 31, 1997 (UNAUDITED)

Principal Amount                                                      Value
- -------------------------------------------------------------------------------

ZERO-COUPON U.S. TREASURY SECURITIES(1)
$62,000,000   REFCORP STRIPS -- PRINCIPAL,
                7.52%, 10/15/19                              $   11,744,040
 77,823,000   REFCORP STRIPS-- COUPON,
                7.53%, 1/15/20                                   14,437,723
451,000,000   STRIPS-- COUPON, 7.38%,
                2/15/20                                          85,938,050
 43,344,000   REFCORP STRIPS-- COUPON,
                7.53%, 4/15/20                                    7,895,110
410,500,000   STRIPS-- COUPON, 7.385%,
                5/15/20                                          76,755,290
 95,000,000   STRIPS-- PRINCIPAL, 7.38%,
                5/15/20                                          17,783,050
112,400,000   REFCORP STRIPS-- COUPON,
                7.53%, 7/15/20                                   20,095,996
645,000,000   REFCORP STRIPS-- PRINCIPAL,
                7.53%, 7/15/20                                  115,319,550
217,135,000   STRIPS-- COUPON, 7.385%,
                8/15/20                                          39,857,301
181,000,000   STRIPS-- PRINCIPAL, 7.38%,
                8/15/20                                          33,262,370
139,165,000   REFCORP STRIPS-- COUPON,
                7.53%, 10/15/20                                  24,429,024
600,000,000   REFCORP STRIPS-- PRINCIPAL,
                7.53%, 10/15/20                                 105,324,000
251,707,000   STRIPS-- COUPON, 7.39%,
                11/15/20(2)                                      45,337,465
 42,505,000   REFCORP STRIPS-- COUPON,
                7.53%, 1/15/21                                    7,323,612
672,945,000   REFCORP STRIPS-- PRINCIPAL,
                7.53%, 1/15/21                                  115,948,423
204,250,000   STRIPS-- COUPON, 7.385%,
                2/15/21                                          36,158,378
374,500,000   STRIPS-- COUPON, 7.38%,
                5/15/21                                          65,200,450
 50,000,000   STRIPS-- COUPON, 7.38%,
                8/15/21                                           8,546,500
 14,500,000   STRIPS-- COUPON, 7.37%,
   11/15/21                                                       2,440,495
                                                                -----------
TOTAL INVESTMENT SECURITIES--100.0%                            $833,796,827
   (Cost $841,708,925)                                         ============

Notes to Schedule of Investments
REFCORP = Resolution Funding Corporation
STRIPS = Separate Trading of Registered Interest and Principal of Securities 
(1)  The  effective  yield to  maturity at March 31,  1997 is  indicated.  These
     securities  are  purchased at a  substantial  discount  from their value at
     maturity.
(2)  Security position, or a portion thereof, has been loaned.

See Notes to Financial Statements


24   Target Maturities Trust: 2020                  American Century Investments

<TABLE>
<CAPTION>
                         TARGET MATURITIES TRUST: 2025

                                                                     AVERAGE ANNUAL RETURNS
                                                 6 MONTHS           1 YEAR        LIFE OF FUND
TOTAL RETURNS AS OF MARCH 31, 1997
<S>                                                <C>               <C>             <C>   
Target Maturities Trust: 2025                      -1.56%            -2.65%          -10.04%
8/15/25 Maturity
STRIPS Issue                                       -2.85%            -5.76%           -8.54%(1)
Merrill Lynch Long-Term
Treasury Index                                      1.48%             2.83%            0.80%(1)

(1) Returns since February 29, 1996,  the date nearest the fund's  inception for
which data are available. Inception date was February 15, 1996.
</TABLE>

See pages 44-45 for more information  about returns,  the comparative  index and
the fund's benchmark.

[mountain graph - data below]

GROWTH OF $10,000 OVER THE LIFE OF THE FUND

Value on 3/31/97

$10,000 investment made 2/29/96

            Target: 2025   8/15/25 STRIPS Issue   Merrill Lynch Long-Term Index

Feb-96        $10,000            $10,000                   $10,000
Mar-96         $9,562             $9,632                    $9,810
Apr-96         $9,176             $8,975                    $9,646
May-96         $9,166             $9,028                    $9,600
Jun-96         $9,414             $9,361                    $9,794
Jul-96         $9,398             $9,288                    $9,794
Aug-96         $8,939             $8,808                    $9,675
Sep-96         $9,456             $9,343                    $9,940
Oct-96        $10,270            $10,159                   $10,327
Nov-96        $11,046            $10,856                   $10,667
Dec-96        $10,364            $10,158                   $10,414
Jan-97         $9,948             $9,721                   $10,347
Feb-97         $9,879             $9,612                   $10,333
Mar-97         $9,308             $9,077                   $10,087

Past  performance  does not  guarantee  future  results.  Investment  return and
principal  value will fluctuate,  and redemption  value may be more or less than
original cost. This chart begins on 2/29/96 because that is the date nearest the
fund's inception for which data are available.  The line representing the fund's
total  return  includes  operating  expenses  (such  as  transaction  costs  and
management  fees) that reduce returns,  while the total return line of the index
does not.

PORTFOLIO AT A GLANCE
                                     3/31/97           9/30/96
Number of Securities                   13                12
Anticipated Growth Rate               6.62%             6.43%
Weighted Average Maturity Date       4/9/25            4/9/25
Anticipated Value at Maturity        $109.32           $109.24
Expense Ratio                        0.62%*            0.67%*

* Annualized.

           You will receive a proxy statement in June. Please read it
                   carefully and take part in the proxy vote.


Semiannual Report                             Target Maturities Trust: 2025   25


                         TARGET MATURITIES TRUST: 2025

Management Q & A

An interview with Dave Schroeder,  a vice president and senior portfolio manager
on the Target Maturities Trust management team.

HOW DID THE FUND PERFORM DURING THE SIX-MONTH PERIOD ENDED MARCH 31, 1997?

The extreme  sensitivity of long-term  zero-coupon  bonds to changes in interest
rates is  clearly  demonstrated  by the  fund's  returns.  As a result of rising
yields  on  long-term  zeros,  the fund  posted a -1.56%  total  return  for the
six-month  period.  (See the Total  Returns table on the previous page for other
fund performance comparisons.)

HOW DID THE FUND PERFORM COMPARED WITH ITS BENCHMARK?

Despite the fund's  negative  returns,  it still  outperformed  the -2.85% total
return of its benchmark,  a coupon STRIPS issue maturing on August 15, 2025. The
fund's shorter average maturity  relative to its benchmark,  which insulated the
fund from some of the negative  effects of rising interest rates, was one reason
behind its  outperformance.  In addition,  the fund performed  better because we
carefully invested the additional cash inflows we received during the period.

Given that the fund's assets nearly doubled over the six-month  period,  we were
constantly  on the  lookout  for  attractively  valued  zeros that we felt would
enhance the fund's returns.  Because they are the only types of government zeros
available in this maturity sector,  REFCORPs and STRIPS were the only securities
held in the fund.

WERE THERE OTHER SIGNIFICANT FACTORS THAT HELPED IMPROVE THE FUND'S RETURNS?

Another factor buoying returns was the fund's holdings of REFCORPs. The slope of
the Treasury  zero-coupon  bond curve  resulted in lower returns for STRIPS that
mature in 2024 through 2026 than for similar-maturity REFCORPs.

We used incoming assets to purchase REFCORPs because they offered more yield and
higher potential returns than STRIPS in this maturity sector.  While we continue
to look for REFCORPs in this maturity,  we will continue to monitor the relative
values of  REFCORPs  and  STRIPS,  shifting  the fund's  assets  toward the more
attractively priced sector.

WHY IS THE FUND'S  BENCHMARK A COUPON STRIPS ISSUE  MATURING ON AUGUST 15, 2025,
WHEN THE  BENCHMARKS  FOR THE OTHER  TARGET  FUNDS  MATURE ON NOVEMBER 15 OF THE
TARGET YEAR?

Until  recently,  a coupon STRIPS issue  maturing on November 15, 2025,  was not
available.  Since these securities are now available,  we will likely change the
fund's  benchmark in the near future.  This latter  maturity  better matches the
fund's targeted maturity date of December 31, 2025.

LOOKING  AHEAD,  WHAT IS YOUR OUTLOOK FOR THE TREASURY  MARKET OVER THE NEXT SIX
MONTHS?

Bond yields rose dramatically in the first quarter of 1997,  largely because the
U.S.  economy has shown  faster-than-normal  growth and wages have been  rising.
These factors also led the Federal Reserve to raise short-term interest rates in
March.  The Fed appears to be in a  rate-raising  mode; our only question is how
high rates will go.


26   Target Maturities Trust: 2025                  American Century Investments


                         TARGET MATURITIES TRUST: 2025

Historically,  the  average  Fed  "tightening  cycle"--a  series of  consecutive
short-term interest rate increases designed to restrain economic growth and head
off  inflation--consisted  of four  rate  hikes  totaling  200  basis  points (2
percentage  points).  That  magnitude of  tightening  seems  unlikely  this time
around,  especially  because rising wage pressures have not  materialized in the
consumer inflation figures.  In addition,  the rise in bond yields over the past
few months may already be enough to slow economic activity and keep inflation at
bay. Overall, we believe that this will be a mild Fed tightening cycle.

Nevertheless,  the bond market has already  priced in another Fed rate increase,
even though inflation remained tame in the first quarter of 1997.

WHAT IS YOUR STRATEGY FOR THE FUND GOING FORWARD?

We will  likely  continue  our  efforts to extend the  fund's  weighted  average
maturity  (WAM)  date  so  that  it can  better  track  the  performance  of its
benchmark. In addition, we will work to keep turnover and transaction costs to a
minimum by using cash  inflows  and  outflows  as  opportunities  to buy or sell
securities.

Despite  the  fact  that  supply  at the long  end of the  zero-coupon  curve is
inconsistent,  we  expect  to keep the fund  fully  invested  in  zeros.  In the
process,  we will  continue  to  concentrate  the bulk of the  fund's  assets in
REFCORPs, investing the remainder in STRIPS.

[pie charts]

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 3/31/97)
REFCORPs 58%
STRIPS 42%

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 9/30/96)
STRIPS 64%
REFCORPs 36%


Semiannual Report                             Target Maturities Trust: 2025   27


                            SCHEDULE OF INVESTMENTS
                         TARGET MATURITIES TRUST: 2025

MARCH 31, 1997 (UNAUDITED)

Principal Amount                                                      Value
- -------------------------------------------------------------------------------

ZERO-COUPON U.S. TREASURY SECURITIES(1)
$ 3,926,000   REFCORP STRIPS -- COUPON,
                7.43%, 7/15/24                               $     536,174
 74,083,000   REFCORP STRIPS-- COUPON,
                7.42%, 10/15/24                                  9,962,682
 13,000,000   STRIPS-- COUPON, 7.28%,
                11/15/24(2)                                      1,803,750
 17,500,000   STRIPS-- PRINCIPAL, 7.27%,
                11/15/24                                         2,434,600
 30,500,000   REFCORP STRIPS-- COUPON,
                7.41%, 1/15/25                                   4,037,895
 95,900,000   STRIPS-- COUPON, 7.285%,
                2/15/25(2)                                      13,048,154
 40,300,000   STRIPS-- PRINCIPAL, 7.255%,
                2/15/25                                          5,527,951
 19,759,000   REFCORP STRIPS-- COUPON,
                7.40%, 4/15/25                                   2,575,982
  8,500,000   REFCORP STRIPS-- COUPON,
                7.39%, 7/15/25                                   1,091,060
 71,425,000   REFCORP STRIPS-- COUPON,
                7.38%, 10/15/25                                  9,028,834
  6,000,000   REFCORP STRIPS-- COUPON,
                7.37%, 1/15/26                                     746,820
  6,000,000   REFCORP STRIPS-- COUPON,
                7.36%, 4/15/26                                     735,600
 27,000,000   REFCORP STRIPS-- COUPON,
                7.35%, 7/15/26                                   3,259,710
                                                                 ---------
TOTAL INVESTMENT SECURITIES--100.0%                            $54,789,212
     (Cost $58,998,378)                                        ===========

Notes to Schedule of Investments
REFCORP = Resolution Funding Corporation
STRIPS = Separate Trading of Registered Interest and Principal of Securities 
(1)  The  effective  yield to  maturity at March 31,  1997 is  indicated.  These
     securities  are  purchased at a  substantial  discount  from their value at
     maturity.
(2)  Security position, or a portion thereof, has been loaned.

See Notes to Financial Statements


28   Target Maturities Trust: 2025                  American Century Investments

<TABLE>
<CAPTION>
                      STATEMENTS OF ASSETS AND LIABILITIES


MARCH 31, 1997 (UNAUDITED)

                                          2000         2005          2010         2015         2020         2025
                                          ----         ----          ----         ----         ----         ----
<S>                                       <C>       <C>            <C>        <C>          <C>         <C>      
ASSETS
Investment securities, at value 
  (identified cost of 
  $256,034,676, $231,667,160,
  $100,341,650, $84,601,170,
  $841,708,925 and
  $58,998,378,
  respectively) (Note 3) ............$258,333,571 $233,284,274 $100,259,023 $103,062,709 $833,796,827 $54,789,212
Cash ................................     548,286   1,351,268      881,757    2,295,859    1,402,658    1,159,903
Collateral for securities
  loaned (Note 4) ...................          --          --           --           --   34,287,879    4,745,386
Receivable for capital shares sold ..       2,340      22,886           --        1,120        8,039          379
Securities lending fee receivable ...          --          --           --           --       59,298        7,083
Prepaid expenses and other assets ...       6,490       5,862        4,369        4,434       13,519       20,998
                                     ------------ -----------  -----------  -----------  -----------   ----------
                                      258,890,687 234,664,290  101,145,149  105,364,122  869,568,220   60,722,961
                                     ------------ -----------  -----------  -----------  -----------   ----------
LIABILITIES
Disbursements in excess
  of demand deposit cash ............     319,676     268,466      298,199      304,157      899,770        3,342
Payable for capital shares redeemed .      56,497     280,102       72,113       75,796    2,557,424      605,301
Payable for securities loaned
  (Note 4) ..........................          --          --           --           --   34,287,879    4,745,386
Payable to affiliates (Note 2) ......     114,166     105,912       52,512       53,026      356,936       27,363
Accrued expenses and other
  liabilities .......................      10,133       9,359        6,014        8,002       50,403        3,335
                                     ------------ -----------  -----------  -----------  -----------   ----------
                                          500,472     663,839      428,838      440,981   38,152,412    5,384,727
                                     ------------ -----------  -----------  -----------  -----------   ----------
Net Assets Applicable to
Outstanding Shares ..................$258,390,215 $234,000,451 $100,716,311 $104,923,141 $831,415,808 $55,338,234
                                     ============ ============ ============ ============ ============ ===========

CAPITAL SHARES
Outstanding (Unlimited number
  of shares authorized) .............   3,167,164   3,996,476    2,339,359    3,251,275   37,598,656    3,139,679
                                     ============ ============ ============ ============ ============ ===========
Net Asset Value Per Share ...........      $81.58      $58.55       $43.05       $32.27       $22.11       $17.63
                                     ============ ============ ============ ============ ============ ===========

NET ASSETS CONSIST OF:
Capital paid in .....................$256,110,115 $227,818,201 $98,493,902 $ 85,168,860 $824,246,552  $59,632,704
Undistributed net investment income .   4,054,387   3,703,596    1,627,246    1,688,342   13,920,333      822,666
Accumulated net realized gain (loss)
  on investment transactions ........  (4,073,182)    861,540      677,790     (395,600)   1,161,021     (907,970)
Net unrealized appreciation 
  (depreciation)
  on investments (Note 3) ...........   2,298,895   1,617,114      (82,627)  18,461,539   (7,912,098)  (4,209,166)
                                     ------------ ------------ ------------ ------------ ------------  -----------
                                     $258,390,215 $234,000,451 $100,716,311 $104,923,141 $831,415,808  $55,338,234
                                     ============ ============ ============ ============ ============  ===========
See Notes to Financial Statements
</TABLE>


Semiannual Report                      Statements of Assets and Liabilities   29

<TABLE>
<CAPTION>
                            STATEMENTS OF OPERATIONS

FOR THE SIX MONTHS ENDED
MARCH 31, 1997 (UNAUDITED)

                                          2000         2005          2010         2015         2020         2025
                                          ----         ----          ----         ----         ----         ----

INVESTMENT INCOME
Income:
<S>                                    <C>         <C>          <C>          <C>         <C>          <C>       
Interest ............................. $8,886,031  $8,120,635   $3,712,025   $3,693,767  $30,684,353  $1,558,032
Income from securities lending .......         --          --           --           --      106,901      12,773
                                        ---------   ---------    ---------    ---------   ----------   ---------
                                        8,886,031   8,120,635    3,712,025    3,693,767   30,791,254   1,570,805
                                        ---------   ---------    ---------    ---------   ----------   ---------
Expenses (Note 2):
Investment advisory fees .............    391,222     355,430      160,940      169,436    1,324,006      67,347
Administrative fees ..................    125,102     113,558       51,397       54,108      422,791      21,469
Transfer agency fees .................    119,685     126,185       79,175       79,660      363,914      30,485
Printing and postage .................     32,131      29,969       15,231       15,649       97,672       5,823
Custodian fees .......................      9,682       9,377        6,412        8,401       52,525       4,427
Auditing and legal fees ..............     10,349       9,485        5,283        5,453       30,942       3,379
Telephone expenses ...................      4,253       3,488        1,902        2,747       14,510       2,743
Registration and filing fees .........     15,748      17,323       12,335       14,226       13,243      15,178
Directors' fees and expenses .........      5,243       5,054        4,023        4,068       10,235       3,504
Other operating expenses .............      4,398       3,798        2,093        1,676        7,935       3,132
                                        ---------   ---------    ---------    ---------   ----------   ---------
  Total expenses .....................    717,813     673,667      338,791      355,424    2,337,773     157,487
Amount waived ........................         --          --           --           --           --     (15,244)
                                        ---------   ---------    ---------    ---------   ----------   ---------
  Net expenses .......................    717,813     673,667      338,791      355,424    2,337,773     142,243
                                        ---------   ---------    ---------    ---------   ----------   ---------
Net investment income ................  8,168,218   7,446,968    3,373,234    3,338,343   28,453,481   1,428,562
                                        ---------   ---------    ---------    ---------   ----------   ---------
REALIZED AND UNREALIZED
GAIN (LOSS) ON INVESTMENTS (NOTE 3)
Net realized gain (loss) on
  investments ........................    519,509   1,310,852      980,759       96,753    7,435,024    (406,621)
Change in net unrealized appreciation
  (depreciation) on investments ...... (3,136,902) (5,494,210)  (2,286,142)  (1,553,136) (21,841,819) (3,527,424)
                                        ---------   ---------    ---------    ---------   ----------   ---------
Net realized and unrealized (loss)
on investments ....................... (2,617,393) (4,183,358)  (1,305,383)  (1,456,383) (14,406,795) (3,934,045)
                                        ---------   ---------    ---------    ---------   ----------   ---------
Net Increase (Decrease) in Net Assets
Resulting from Operations ............ $5,550,825  $3,263,610   $2,067,851   $1,881,960  $14,046,686 ($2,505,483)
                                       ==========  ==========   ==========   ==========  =========== =========== 

See Notes to Financial Statements
</TABLE>


30   Statements of Operations                       American Century Investments

<TABLE>
<CAPTION>
                      STATEMENTS OF CHANGES IN NET ASSETS

FOR THE SIX MONTHS ENDED MARCH 31, 1997 (UNAUDITED) AND YEAR ENDED
SEPTEMBER 30, 1996

                                                 2000                      2005                    2010
                                        ---------------------   ----------------------   -----------------------
                                        March 31,   Sept. 30,    March 31,    Sept. 30,   March 31,    Sept. 30,
Increase (Decrease) in Net Assets         1997        1996         1997         1996        1997         1996
OPERATIONS
<S>                                   <C>          <C>          <C>         <C>           <C>          <C>        
Net investment income ............... $ 8,168,218  $ 7,234,905  $ 7,446,968 $ 13,769,131  $ 3,373,234  $  ,720,988
Net realized gain
  on investments ....................     519,509    1,066,551    1,310,852    1,459,753      980,759    3,276,781
Change in net unrealized
  appreciation (depreciation)
  on investments ....................  (3,136,902)  (6,811,361)  (5,494,210) (12,781,340)  (2,286,142) (10,369,618)
                                       ----------   ----------   ----------  -----------   ----------  ----------- 
Net increase (decrease)
  in net assets resulting
  from operations ...................   5,550,825   11,490,095    3,263,610    2,447,544    2,067,851     (371,849)
                                        ---------   ----------    ---------    ---------    ---------     -------- 

DISTRIBUTIONS TO SHAREHOLDERS
From net investment income .......... (17,081,069) (14,295,441) (14,550,326)  (8,101,012)  (6,941,406)  (4,075,907)
From net realized gains on
  investment transactions ...........          --           --   (1,764,814)  (2,276,770)  (2,886,955)          --
                                        ---------   ----------    ---------    ---------    ---------     -------- 
Decrease in nets assets from
  distributions to shareholders ..... (17,081,069) (14,295,441) (16,315,140) (10,377,782)  (9,828,361)  (4,075,907)
                                      -----------  -----------  -----------  -----------   ----------   ---------- 

CAPITAL SHARE TRANSACTIONS
Proceeds from shares sold ...........  40,805,240  119,660,626   57,196,500  148,911,501   27,753,974   70,823,974
Proceeds from reinvestment
  of distributions ..................  16,712,104   13,909,269   15,993,070   10,138,688    9,617,856    3,967,590
Payments for shares redeemed ........ (55,353,473)(157,743,941) (65,001,517) (95,708,098) (40,012,200) (54,283,235)
                                      ----------- ------------  -----------  -----------  -----------  ----------- 
Net increase (decrease) in net assets
  from capital share transactions ...   2,163,871  (24,174,046)   8,188,053   63,342,091   (2,640,370)  20,508,329
                                        ---------  -----------    ---------   ----------   ----------   ----------

Net increase (decrease)
  in net assets .....................  (9,366,373) (26,979,392)  (4,863,477)  55,411,853  (10,400,880)  16,060,573

NET ASSETS
Beginning of period ................. 267,756,588  294,735,980  238,863,928  183,452,075  111,117,191   95,056,618
                                      -----------  -----------  -----------  -----------  -----------   ----------
End of period .......................$258,390,215 $267,756,588 $234,000,451 $238,863,928 $100,716,311 $111,117,191
                                     ============ ============ ============ ============ ============ ============

TRANSACTIONS IN SHARES OF THE FUNDS
Sold ................................     496,402   1,519,287      945,664    2,554,065      611,992   1,630,076
Issued in reinvestment
  of distributions ..................     217,238     183,642      282,758      177,478      233,037      89,942
Redeemed ............................    (673,811) (1,999,924)  (1,074,308)  (1,660,147)    (884,108) (1,267,142)
Reverse share split .................    (221,717)   (188,515)    (288,044)    (181,450)    (237,690)    (92,308)
                                         --------    --------     --------     --------     --------     ------- 
Net increase (decrease) .............    (181,888)   (485,510)    (133,930)     889,946     (276,769)    360,568
                                         ========    ========     ========      =======     ========     =======

See Notes to Financial Statements
</TABLE>


Semiannual Report                       Statements of Changes in Net Assets   31

<TABLE>
<CAPTION>
                      STATEMENTS OF CHANGES IN NET ASSETS

FOR THE SIX MONTHS ENDED MARCH 31, 1997 (UNAUDITED) AND YEAR ENDED
SEPTEMBER 30, 1996

                                                 2000                      2005                    2010

                                        March 31,   Sept. 30,    March 31,    Sept. 30,    March 31,   Sept. 30,
Increase (Decrease) in Net Assets         1997        1996         1997         1996         1997       1996(1)
OPERATIONS
<S>                                   <C>          <C>         <C>            <C>         <C>            <C>       
Net investment income ................$ 3,338,343  $ 6,946,156 $ 28,453,481   $ 9,119,311 $  1,428,562   $  997,384
Net realized gain
  (loss) on investments ..............     96,753      718,224    7,435,024    (5,541,503)    (406,621)    (501,349)
Change in net unrealized
  appreciation (depreciation)
  on investments ..................... (1,553,136)  (9,126,013) (21,841,819)  (53,272,683)  (3,527,424)    (681,742)
                                       ----------   ----------  -----------   -----------   ----------     -------- 
Net increase (decrease)
  in net assets resulting
  from operations ....................  1,881,960   (1,461,633)  14,046,686    (9,694,875)  (2,505,483)    (185,707)
                                        ---------   ----------   ----------    ----------   ----------     -------- 

DISTRIBUTIONS TO SHAREHOLDERS
From net investment income ........... (6,897,464)  (4,803,254) (54,220,221)  (13,777,349)  (1,603,280)          --
From net realized gains on
  investment transactions ............ (1,134,992)  (6,017,851)        (831)   (1,324,633)          --           --
                                       ----------  -----------  -----------   -----------   ----------   ----------
Decrease in nets assets from
  distributions to shareholders ...... (8,032,456) (10,821,105) (54,221,052)  (15,101,982)  (1,603,280)          --
                                       ----------  -----------  -----------   -----------   ----------   ----------

CAPITAL SHARE TRANSACTIONS
Proceeds from shares sold ............ 35,324,355   77,986,100  377,861,552 1,028,945,392   77,198,993   67,610,593
Proceeds from reinvestment
  of distributions ...................  7,800,160   10,455,098   51,887,592    14,532,555    1,500,130           --
Payments for shares redeemed .........(47,704,703) (75,152,046)(484,478,180) (667,063,399) (54,912,728) (31,764,284)
                                      -----------  ----------- ------------  ------------  -----------  ----------- 
Net increase (decrease) in net assets
  from capital share transactions .... (4,580,188)  13,289,152  (54,729,036)  376,414,548   23,786,395   35,846,309
                                       ----------   ----------  -----------   -----------   ----------   ----------

Net increase (decrease)
  in net assets ......................(10,730,684)   1,006,414  (94,903,402)  351,617,691   19,677,632   35,660,602

NET ASSETS
Beginning of period ..................115,653,825  114,647,411  926,319,210   574,701,519   35,660,602           --
                                     ------------  -----------  -----------   -----------   ----------  -----------
End of period .......................$104,923,141 $115,653,825 $831,415,808  $926,319,210  $55,338,234  $35,660,602
                                     ============ ============ ============  ============  ===========  ===========

TRANSACTIONS IN SHARES OF THE FUNDS
Sold .................................  1,031,865   2,345,915   15,728,707   45,297,616    4,013,674   3,762,927
Issued in reinvestment of
  distributions ......................    241,403     318,306    2,286,213      585,620       79,037          --
Redeemed ............................. (1,392,320) (2,277,097) (20,135,859) (28,747,471)  (2,860,427) (1,771,271)
Reverse share split ..................   (248,097)   (328,626)  (2,383,074)    (608,060)     (84,261)          -
                                         --------    --------   ----------     --------      -------   ---------
Net increase (decrease) ..............   (367,149)     58,498   (4,504,013)  16,527,705    1,148,023   1,991,656
                                         ========      ======   ==========   ==========    =========   =========


(1)  February 15, 1996 (inception) through September 30, 1996.

See Notes to Financial Statements
</TABLE>


32   Statements of Changes in Net Assets            American Century Investments


                         NOTES TO FINANCIAL STATEMENTS

MARCH 31, 1997 (UNAUDITED)

1. Organization and Summary of Significant Accounting Policies

Organization--American Century Target Maturities Trust (the Trust) is registered
under the Investment Company Act of 1940 as an open-end  diversified  management
investment  company.  The Trust is composed of the  following  series:  American
Century - Benham Target Maturities Trust: 2000 (2000), American Century - Benham
Target  Maturities  Trust:  2005  (2005),   American  Century  -  Benham  Target
Maturities  Trust:  2010 (2010),  American  Century - Benham  Target  Maturities
Trust:  2015 (2015),  American Century - Benham Target  Maturities  Trust:  2020
(2020),  and American Century - Benham Target Maturities Trust: 2025 (2025) (the
Funds).  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.  The following  significant
accounting  policies,  related to the Funds,  are in accordance  with accounting
policies generally accepted in the investment company industry.

Security Valuations--  Securities are valued through valuations obtained through
a  commercial  pricing  service or at the mean of the most  recent bid and asked
prices. When valuations are not readily available, securities are valued at fair
value as  determined  in  accordance  with  procedures  adopted  by the Board of
Trustees.

Security  Transactions--  Security  transactions  are  accounted for on the date
purchased  or  sold.  Net  realized  gains  and  losses  are  determined  on the
identified cost basis, which is also used for federal income tax purposes.

Investment  Income--  Interest  income  is  recorded  on the  accrual  basis and
includes  amortization  of discounts  and  premiums.  Premiums and discounts are
amortized using the effective interest rate method.

Income Tax Status-- It is the Funds'  policy to  distribute  all net  investment
income and net realized capital gains to shareholders  and to otherwise  qualify
as a regulated  investment  company under the provisions of the Internal Revenue
Code. Accordingly, no provision has been made for federal or state taxes.

Distributions  to  Shareholders--Distributions  from net  investment  income are
declared and paid annually in December.  Distributions  from net realized  gains
are declared and paid annually.

The character of distributions  made during the year from net investment  income
or net  realized  gains may differ  from  their  ultimate  characterization  for
federal  income tax purposes.  These  differences  are due to differences in the
recognition  of  income  and  expense  items  for  financial  statement  and tax
purposes.

Reverse  Share   Splits--The   trustees  may  authorize   reverse  share  splits
immediately after and of a size that exactly offsets the per share amount of the
annual  dividend  and capital  gain  distribution  (if any).  After  taking into
account the reverse share split, a shareholder reinvesting dividends and capital
gain  distributions  will hold  exactly the same number of shares owned prior to
the  distributions  and reverse share split.  A shareholder  electing to receive
dividends in cash will own fewer shares.

Supplementary  Information--Certain  officers and trustees of the Trust are also
officers and/or directors, and, as a group, controlling stockholders of American
Century  Companies,  Inc. (ACC), the parent of the Trust's  investment  advisor,
Benham Management  Corporation (BMC), the Trust's distributor,  American Century
Investment  Services,  Inc.  (ACIS),  and the Trust's  transfer agent,  American
Century Services Corporation (ACSC).

Use of  Estimates--The  preparation of financial  statements in conformity  with
generally accepted  accounting  principles requires management to make estimates
and assumptions  that affect the reported  amounts of assets and liabilities and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the reported  amounts of increases  and  decreases in net assets
from  operations  during the  period.  Actual  results  could  differ from these
estimates.


Semiannual Report                             Notes to Financial Statements   33


                         NOTES TO FINANCIAL STATEMENTS

MARCH 31, 1997 (UNAUDITED)
- --------------------------------------------------------------------------------
2. Transactions with Related Parties

The  Trust has  entered  into an  Investment  Advisory  Agreement  with BMC that
provides  the  Trust  with  investment  advisory  services  in  exchange  for an
investment  advisory  fee.  ACSC pays all  compensation  of Trust  officers  and
trustees who are officers or  directors  of ACC or any of its  subsidiaries.  In
addition,  promotion and  distribution  expenses are paid by BMC. The investment
advisory  fee is paid  monthly  by each Fund  based on its pro rata share of the
dollar amount derived from applying the Trust's average daily closing net assets
to the following annualized investment advisory fee schedule:

     0.35% of the first $750 million 
     0.25% of the next $750 million 
     0.24% of the next $1 billion  
     0.23% of the next $1 billion  
     0.22% of the next $1 billion
     0.21% of the next $1 billion 
     0.20% of the next $1 billion
     0.19% of the average daily net assets over $6.5 billion

The Trust has an  Administrative  Services and Transfer  Agency  Agreement  with
ACSC. Under the Agreement,  ACSC provides  substantially all  administrative and
transfer agency services necessary to operate the Funds. Fees for these services
are based on  transaction  volume,  number of accounts and average daily closing
net assets for funds  advised by BMC. The  Agreement  was  formerly  with Benham
Financial Services, Inc.

The Trust has an additional agreement with BMC pursuant to which BMC established
a contractual  expense guarantee that limits Fund expenses (excluding items such
as brokerage  commissions,  taxes,  interest,  custodian  earnings credits,  and
extraordinary  expenses) to 0.62% (0.70% prior to June 1, 1996) of average daily
closing  net  assets.  The  agreement  provides  that  BMC may  recover  amounts
(representing  expenses in excess of the Fund's expense guarantee rate) absorbed
during the preceding 11 months, if, and to the extent that, for any given month,
the Fund's  expenses are less than the expense  guarantee rate in effect at that
time.  On April 25, 1997,  the Board of Trustees  approved a plan to implement a
unified management fee, which would replace the existing  contracts,  previously
mentioned,  between  the Funds and  related  parties.  Such plan is  subject  to
shareholder approval and will be voted on in July, 1997.

The payables to affiliates as of March 31, 1997,  based on the above  agreements
were as follows:

                                    2000           2005              2010
                                    ----           ----              ----

Investment Advisor ............ $  65,599       $  59,398          $ 29,001
Administrative Services
and Transfer Agent ............    48,567          46,514            23,511
                                ---------        --------          --------
                                 $114,166        $105,912          $ 52,512
                                =========        ========          ========


                                  2015             2020              2025
                                  ----             ----              ----

Investment Advisor ...........  $  28,955        $214,728          $ 14,551
Administrative Services
and Transfer Agent ...........     24,071         142,208            12,812
                                ---------        --------          --------
                                $  53,026        $356,936          $ 27,363
                                =========        ========          ========

The Trust has a Distribution Agreement with ACIS, which is responsible for
promoting sales of and distributing the Trust's shares. This Agreement was
formerly with Benham Distributors, Inc.


34   Notes to Financial Statements                  American Century Investments


                         NOTES TO FINANCIAL STATEMENTS

MARCH 31, 1997 (UNAUDITED)
- --------------------------------------------------------------------------------
3. Investment Transactions

Investment  transactions  in  U.S.  Treasury  securities  (excluding  short-term
investments) for the six months ended March 31, 1997, were as follows:
<TABLE>

                                          2000        2005         2010         2015        2020         2025
                                          ----        ----         ----         ----        ----         ----

<S>                                  <C>          <C>          <C>         <C>          <C>          <C>        
Purchases ........................... $ 1,985,725 $24,600,109  $16,417,092 $  3,159,650 $109,099,840 $36,377,014

Proceeds From Sales ................. $17,789,782 $33,801,433  $29,592,540  $17,618,110 $216,008,210 $12,964,105


On March 31, 1997, the composition of unrealized appreciation and (depreciation)
of investment  securities  based on the  aggregate  cost of  investments  was as
follows:

                                          2000        2005         2010         2015        2020         2025
                                          ----        ----         ----         ----        ----         ----

Appreciation ....................... $  3,475,796 $ 6,934,551  $ 3,767,522  $18,461,539  $21,928,576   $   7,039
(Depreciation) .....................   (1,176,901) (5,317,437)  (3,850,149)           -  (29,840,674) (4,216,205)
Net ................................    2,298,895   1,617,114      (82,627)  18,461,539   (7,912,098) (4,209,166)

The aggregate cost of  investments  for federal income tax purposes was the same
as the cost for financial reporting purposes.
</TABLE>

- --------------------------------------------------------------------------------
4. Securities Lending

At March 31, 1997, securities valued at $33,322,200 (2020) and $4,524,950 (2025)
were on loan to brokers.  Securities received as collateral,  at this date, were
valued  at  $34,287,879  (2020)  and  $4,745,386  (2025).  The  Funds'  risks in
securities lending are that the borrower may not provide  additional  collateral
when required or return the securities when due.


Semiannual Report                             Notes to Financial Statements   35


                         NOTES TO FINANCIAL STATEMENTS

MARCH 31, 1997 (UNAUDITED)
- --------------------------------------------------------------------------------
5. Corporate Events

The following name changes became effective January 1, 1997:
<TABLE>

                    NEW NAMES                                                   FORMER NAMES
                    ---------                                                   ------------
<S>               <C>                                                       <C>
Funds' Issuer:      American Century Target Maturities Trust                    Benham Target Maturities Trust
Funds:              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
Parent Company:     American Century Companies, Inc.                            Twentieth Century Companies, Inc.
Distributor:        American Century Investment Services, Inc.                  Twentieth Century Securities, Inc.
Transfer Agent:     American Century Services Corporation                       Twentieth Century Services, Inc.
</TABLE>


36   Notes to Financial Statements                  American Century Investments

<TABLE>
<CAPTION>
                              FINANCIAL HIGHLIGHTS
                         TARGET MATURITIES TRUST: 2000

      For a Share Outstanding Throughout the Years Ended September 30 (except as noted)

                                      1997(1)       1996         1995         1994         1993          1992
                                      -------       ----         ----         ----         ----          ----

PER-SHARE DATA(2)
Net Asset Value,
<S>                                  <C>          <C>          <C>           <C>          <C>          <C>   
Beginning of Period ................ $79.95       $76.86       $66.93        $72.40       $62.16       $52.67
                                     ------       ------       ------        ------       ------       ------
Income From Investment Operations
  Net Investment Income ............   2.61         4.75         4.37          3.99         3.94         3.90
  Net Realized and Unrealized Gain
  (Loss) on Investment
  Transactions .....................  (0.98)       (1.66)        5.56         (9.46)        6.30         5.59
                                     ------       ------       ------        ------       ------       ------
  Total From
  Investment Operations ............   1.63         3.09         9.93         (5.47)       10.24         9.49
                                     ------       ------       ------        ------       ------       ------
Distributions
  From Net Investment Income .......  (5.20)       (3.94)       (3.42)        (3.25)       (2.34)       (2.22)
  From Net Realized
  Capital Gains ....................   --           --           --           (2.95)       (1.83)       (0.16)
  In Excess of Net
  Realized Gains ...................   --           --           --           (1.20)        --           --
                                     ------       ------       ------        ------       ------       ------
  Total Distributions ..............  (5.20)       (3.94)       (3.42)        (7.40)       (4.17)       (2.38)
                                     ------       ------       ------        ------       ------       ------
Reverse Share Split ................   5.20         3.94         3.42          7.40         4.17         2.38
                                     ------       ------       ------        ------       ------       ------
Net Asset Value, End of Period ..... $81.58       $79.95       $76.86        $66.93       $72.40       $62.16
                                     ======       ======       ======        ======       ======       ======
  Total Return(3) ..................   2.04%        4.01%       14.84%        (7.54)%      16.46%       18.02%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ..............0.54%(4)        0.53%        0.63%         0.59%        0.60%        0.66%
Ratio of Net Investment Income
to Average Net Assets ..............6.16%(4)        5.99%        6.13%         5.74%        5.94%        6.90%
Portfolio Turnover Rate ............      1%          29%          53%           89%          77%          93%
Net Assets, End
of Period (in thousands) ...........$258,390     $267,757     $294,736      $243,895     $291,418     $190,063


(1)  Six months ended March 31,1997 (unaudited).

(2)  For periods prior to March 31, 1997,  per-share data was  calculated  using
     average shares outstanding during the period. Distributions shown for those
     periods  will be  different  than the  actual  per-share  distributions  to
     shareholders.

(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>

See Notes to Financial Statements


Semiannual Report                                      Financial Highlights   37
<TABLE>
<CAPTION>
                              FINANCIAL HIGHLIGHTS
                         TARGET MATURITIES TRUST: 2005

      For a Share Outstanding Throughout the Years Ended September 30 (except as noted)

                                      1997(1)       1996         1995         1994         1993          1992
                                      -------       ----         ----         ----         ----          ----

PER-SHARE DATA(2)
Net Asset Value,
<S>                                  <C>          <C>          <C>           <C>          <C>          <C>   
Beginning of Period .................$57.83       $56.61       $45.22        $51.84       $41.18       $35.13
                                     ------       ------       ------        ------       ------       ------
Income From Investment Operations
  Net Investment Income .............  1.92         3.50         3.33          3.11         2.90         2.69
  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions . (1.20)       (2.28)        8.06         (9.73)        7.76         3.36
                                      -----        -----         ----         -----         ----         ----
  Total From
  Investment Operations .............  0.72         1.22        11.39         (6.62)       10.66         6.05
                                       ----         ----        -----         -----        -----         ----
Distributions
  From Net Investment Income ........ (3.61)       (2.06)       (2.41)        (2.70)       (2.51)       (1.75)
  From Net Realized Capital Gains ... (0.44)       (0.58)       (0.67)        (8.47)       (1.01)       (0.37)
                                      -----        -----        -----         -----        -----        ----- 
  Total Distributions ............... (4.05)       (2.64)       (3.08)       (11.17)       (3.52)       (2.12)
                                      -----        -----        -----        ------        -----        ----- 
Reverse Share Split .................  4.05         2.64         3.08         11.17         3.52         2.12
                                       ----         ----         ----         -----         ----         ----
Net Asset Value, End of Period ......$58.55       $57.83       $56.61        $45.22       $51.84       $41.18
                                     ======       ======       ======        ======       ======       ======
  Total Return(3) ...................  1.25%        2.15%       25.16%       (12.75)%      25.89%       17.22%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ...............  0.56%(4)     0.58%        0.71%         0.64%        0.62%        0.63%
Ratio of Net Investment Income
to Average Net Assets ...............  6.19%(4)     6.05%        6.58%         6.37%        6.44%        7.27%
Portfolio Turnover Rate .............    10%          31%          34%           68%          50%          64%
Net Assets, End
of Period (in thousands) ............$234,000    $238,864     $183,452       $96,207     $149,890     $168,697

(1)  Six months ended March 31,1997 (unaudited).

(2)  For periods prior to March 31, 1997,  per-share data was  calculated  using
     average shares outstanding during the period. Distributions shown for those
     periods  will be  different  than the  actual  per-share  distributions  to
     shareholders.

(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.

See Notes to Financial Statements
</TABLE>


38   Financial Highlights                           American Century Investments

<TABLE>
<CAPTION>
                              FINANCIAL HIGHLIGHTS
                         TARGET MATURITIES TRUST: 2010

      For a Share Outstanding Throughout the Years Ended September 30 (except as
                                                                          noted)

                                      1997(1)       1996         1995         1994         1993          1992

PER-SHARE DATA(2)
Net Asset Value,
<S>                                  <C>          <C>          <C>           <C>          <C>          <C>   
Beginning of Period .................$42.47       $42.14       $31.67        $38.13       $28.53       $25.08
                                     ------       ------       ------        ------       ------       ------
Income From Investment Operations
  Net Investment Income .............  1.53         2.58         2.41          2.24         2.05         1.88
  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions . (0.95)       (2.25)        8.06         (8.70)        7.55         1.57
                                     ------       ------       ------        ------       ------       ------
  Total From
  Investment Operations .............  0.58         0.33        10.47         (6.46)        9.60         3.45
                                     ------       ------       ------        ------       ------       ------
Distributions
  From Net Investment Income ........ (2.82)       (1.57)       (1.48)        (1.46)       (1.58)       (1.14)
  From Net Realized Capital Gains ... (1.17)        --          (0.48)        (4.31)       (1.14)        --
                                     ------       ------       ------        ------       ------       ------
  Total Distributions ............... (3.99)       (1.57)       (1.96)        (5.77)       (2.72)       (1.14)
                                     ------       ------       ------        ------       ------       ------
Reverse Share Split .................  3.99         1.57         1.96          5.77         2.72         1.14
                                     ------       ------       ------        ------       ------       ------
Net Asset Value, End of Period ......$43.05       $42.47       $42.14        $31.67       $38.13       $28.53
                                     ======       ======       ======        ======       ======       ======
  Total Return(3) ...................  1.37%        0.78%       33.06%       (16.92)%      33.61%       13.76%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ..............0.62%(4)        0.67%        0.71%         0.68%        0.66%        0.70%
Ratio of Net Investment Income
to Average Net Assets ..............6.20%(4)        5.98%        6.56%         6.35%        6.32%        7.20%
Portfolio Turnover Rate ............     15%          24%          26%           35%         132%          95%
Net Assets, End
of Period (in thousands) ...........$100,716     $111,117      $95,057       $46,312      $70,551      $55,565

(1)  Six months ended March 31,1997 (unaudited).

(2)  For periods prior to March 31, 1997,  per-share data was  calculated  using
     average shares outstanding during the period. Distributions shown for those
     periods  will be  different  than the  actual  per-share  distributions  to
     shareholders.

(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.

See Notes to Financial Statements
</TABLE>

Semiannual Report                                      Financial Highlights   39

<TABLE>
<CAPTION>
                              FINANCIAL HIGHLIGHTS
                         TARGET MATURITIES TRUST: 2015

      For a Share Outstanding Throughout the Years Ended September 30 (except as
                                                                          noted)

                                      1997(1)       1996         1995         1994         1993          1992

PER-SHARE DATA(2)
Net Asset Value,
<S>                                  <C>          <C>          <C>           <C>          <C>          <C>   
Beginning of Period .................$31.96       $32.20       $22.79        $29.04       $20.39       $18.44
                                     ------       ------       ------        ------       ------       ------
Income From Investment Operations
  Net Investment Income .............  1.12         1.85         1.71          1.57         1.46         1.33
  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions . (0.81)       (2.09)        7.70         (7.82)        7.19         0.62
                                     ------       ------       ------        ------       ------       ------
  Total From
  Investment Operations .............  0.31        (0.24)        9.41         (6.25)        8.65         1.95
                                     ------       ------       ------        ------       ------       ------
Distributions
  From Net Investment Income ........ (2.05)       (1.28)       (0.87)        (1.19)       (1.45)       (1.23)
  From Net Realized Capital Gains ... (0.34)       (1.61)        --           (7.08)       (0.34)        --
  In Excess of Net Realized Gains ...  --           --           --           (0.37)        --           --
                                     ------       ------       ------        ------       ------       ------
  Total Distributions ............... (2.39)       (2.89)       (0.87)        (8.64)       (1.79)       (1.23)
                                     ------       ------       ------        ------       ------       ------
Reverse Share Split .................  2.39         2.89         0.87          8.64         1.79         1.23
                                     ------       ------       ------        ------       ------       ------
Net Asset Value, End of Period ......$32.27       $31.96       $32.20        $22.79       $29.04       $20.39
                                     ======       ======       ======        ======       ======       ======
  Total Return(3) ...................  0.97%       (0.74)%      41.29%       (21.52)%      42.42%       10.57%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ..............0.62%(4)        0.65%        0.71%         0.68%        0.63%        0.62%
Ratio of Net Investment Income
to Average Net Assets ..............5.83%(4)        5.63%        6.40%         5.97%        6.28%        7.04%
Portfolio Turnover Rate ............      3%          17%          70%           65%         138%         103%
Net Assets, End
of Period (in thousands) ...........$104,923     $115,654     $114,647       $66,073      $89,023     $131,106

(1)  Six months ended March 31,1997 (unaudited).

(2)  For periods prior to March 31, 1997,  per-share data was  calculated  using
     average shares outstanding during the period. Distributions shown for those
     periods  will be  different  than the  actual  per-share  distributions  to
     shareholders.

(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.

See Notes to Financial Statements
</TABLE>


40   Financial Highlights                           American Century Investments
<TABLE>
<CAPTION>
                              FINANCIAL HIGHLIGHTS
                         TARGET MATURITIES TRUST: 2020

      For a Share Outstanding Throughout the Years Ended September 30 (except as
                                                                          noted)

                                      1997(1)       1996         1995         1994         1993          1992

PER-SHARE DATA(2)
Net Asset Value,
<S>                                  <C>          <C>          <C>           <C>          <C>          <C>   
Beginning of Period .................$22.00       $22.47       $15.28        $20.72       $13.63       $12.54
                                     ------       ------       ------        ------       ------       ------
Income From Investment Operations
  Net Investment Income .............  0.88         1.41         1.19          1.13         1.00         0.92
  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions . (0.77)       (1.88)        6.00         (6.57)        6.09         0.17
                                     ------       ------       ------        ------       ------       ------
  Total From
  Investment Operations .............  0.11        (0.47)        7.19         (5.44)        7.09         1.09
                                     ------       ------       ------        ------       ------       ------
Distributions
  From Net Investment Income ........ (1.45)       (0.40)       (0.21)        (0.28)       (0.53)       (0.63)
  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)
                                     ------       ------       ------        ------       ------       ------
Reverse Share Split .................  1.45         0.44         0.21          2.77         1.25         0.71
                                     ------       ------       ------        ------       ------       ------
Net Asset Value, End of Period ......$22.11       $22.00       $22.47        $15.28       $20.72       $13.63
                                     ======       ======       ======        ======       ======       ======
  Total Return(3) ...................  0.50%       (2.09)%      47.05%       (26.25)%      52.02%        8.69%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ..............0.52%(4)        0.61%        0.72%         0.70%        0.70%        0.66%
Ratio of Net Investment Income
to Average Net Assets ..............6.33%(4)        6.25%        6.24%         6.28%        6.10%        7.19%
Portfolio Turnover Rate ............     12%          47%          78%          116%         179%         144%
Net Assets, End
of Period (in thousands) ..........$831,416      $926,319     $574,702       $58,535      $56,125      $41,793

(1)  Six months ended March 31,1997 (unaudited).

(2)  For periods prior to March 31, 1997,  per-share data was  calculated  using
     average shares outstanding during the period. Distributions shown for those
     periods  will be  different  than the  actual  per-share  distributions  to
     shareholders.

(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.

See Notes to Financial Statements
</TABLE>


Semiannual Report                                      Financial Highlights   41
<TABLE>
<CAPTION>
                              FINANCIAL HIGHLIGHTS
                         TARGET MATURITIES TRUST: 2025

                        For a Share Outstanding Throughout the Periods Indicated

                                                                             1997(1)          1996(2)

PER-SHARE DATA
Net Asset Value,
<S>                                                                         <C>               <C>   
Beginning of Period ....................................................... $17.91            $19.85
                                                                            ------            ------
Income From Investment Operations
   Net Investment Income ..................................................   0.48              0.72
   Net Realized and Unrealized (Loss) on Investment Transactions ..........  (0.76)            (2.66)
                                                                             -----             ----- 
   Total From Investment Operations .......................................  (0.28)            (1.94)
                                                                             -----             ----- 
Distributions
   From Net Investment Income .............................................  (0.72)               --
                                                                             -----             ----- 
Reverse Share Split .......................................................   0.72                --
                                                                             -----             ----- 
Net Asset Value, End of Period ............................................ $17.63            $17.91
                                                                            ======            ======
   Total Return(3) ........................................................  (1.56)%           (9.77)%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses to Average Net Assets ......................... 0.62%(4)          0.67%(4)
Ratio of Net Investment Income to Average Net Assets ...................... 6.26%(4)          6.57%(4)
Portfolio Turnover Rate ...................................................     29%               61%
Net Assets, End of Period (in thousands) .................................. $55,338           $35,661

(1)  Six months ended March 31,1997 (unaudited).

(2)  February 15, 1996 (inception)  through  September 30, 1996.  Per-share data
     was  calculated  using  average  shares   outstanding  during  the  period.
     Distributions  shown for this  period  will be  different  than the  actual
     per-share distributions to shareholders.

(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.

See Notes to Financial Statements
</TABLE>


42   Financial Highlights                           American Century Investments


                              IMPORTANT NOTICE FOR
                        ALL IRA AND 403(b) SHAREHOLDERS

As required by law, any distributions you receive from an IRA and certain 403(b)
distributions  [not  eligible for  rollover to an IRA or to another  403(b)] are
subject to federal income tax withholding at the rate of 10% of the total amount
withdrawn,  unless you elect not to have withholding apply. If you don't want us
to withhold  on this  amount,  you may send us a written  notice not to have the
federal  income tax withheld.  Your written  notice is valid for six months from
the date of  receipt  at  American  Century.  Even if you plan to roll  over the
amount you withdraw to another tax-deferred  account, the withholding rate still
applies to the withdrawn  amount unless we have received a written notice not to
withhold federal income tax within six months prior to the withdrawal.

When  you plan to  withdraw,  you may  make  your  election  by  completing  our
Exchange/  Redemption form or an IRS Form W-4P. Call American Century for either
form.  Your  written  election  is valid  for only six  months  from the date of
receipt at American Century. You may revoke your election at any time by sending
a written notice to us.

Remember,  even if you elect not to have income tax withheld, you are liable for
paying income tax on the taxable portion of your withdrawal. If you elect not to
have income tax withheld or you don't have enough income tax  withheld,  you may
be responsible  for payment of estimated tax. You may incur  penalties under the
estimated  tax rules if your  withholding  and  estimated  tax  payments are not
sufficient.


Semiannual Report                                          Important Notice   43


                             BACKGROUND INFORMATION

Investment Philosophy and Policies

The American  Century  group offers 42  fixed-income  funds,  ranging from money
market funds to long-term  bond funds and including  both taxable and tax-exempt
funds.

The six Target Maturities Trust funds,  including Target:  2000,  Target:  2005,
Target:  2010, Target:  2015, Target: 2020 and Target: 2025, are variable-priced
bond funds that invest  primarily in zero-coupon  U.S.  Treasury  securities and
will be liquidated shortly after the conclusion of their target maturity year.

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.

Comparative Index

The following index is used in the report for fund performance comparisons.  The
index is not an investment product available for purchase.

The  Merrill  Lynch  Long-Term  Treasury  Index  is an  index  of U.S.  Treasury
securities with maturities greater than 10 years.

Fund Benchmarks

The  benchmarks for the Target  Maturities  Trust funds are coupon STRIPS issues
maturing in the target year of each portfolio.

The  benchmark  for the  Target:  2000  fund  is the  11/15/00  STRIPS  Issue--a
zero-coupon Treasury bond that matures November 15, 2000.

The  benchmark  for the  Target:  2005  fund  is the  11/15/05  STRIPS  Issue--a
zero-coupon Treasury bond that matures November 15, 2005.

The  benchmark  for the  Target:  2010  fund  is the  11/15/10  STRIPS  Issue--a
zero-coupon Treasury bond that matures November 15, 2010.

The  benchmark  for the  Target:  2015  fund  is the  11/15/15  STRIPS  Issue--a
zero-coupon Treasury bond that matures November 15, 2015.

The  benchmark  for the  Target:  2020  fund  is the  11/15/20  STRIPS  Issue--a
zero-coupon Treasury bond that matures November 15, 2020.

The  benchmark  for  the  Target:  2025  fund  is the  8/15/25  STRIPS  Issue--a
zero-coupon Treasury bond that matures August 15, 2025.


                           PORTFOLIO MANAGEMENT TEAM
                           -------------------------
                           Vice President and
                           Senior Portfolio Manager      Dave Schroeder

                           Portfolio Manager             Casey Colton


44   Background Information                         American Century Investments


                                    GLOSSARY

Investment Terms

o    Basis Point--one  one-hundredth of a percentage point (or 0.01%). 100 basis
     points equal one percentage point (or 1%).

o    Coupon--the stated interest rate of a security.

o    Yield Curve--a graphic  representation of the relationship between maturity
     and yield for fixed-income securities.  Yield curve graphs plot lengthening
     maturities  along the horizontal  axis and rising yields along the vertical
     axis.

Returns

o    Total Return figures show the overall  percentage  change in the value of a
     hypothetical  investment  in the fund  and  assume  that all of the  fund's
     distributions are reinvested.

o    Average Annual  Returns  illustrate  the annually  compounded  returns that
     would have  produced  the  fund's  cumulative  total  returns if the fund's
     performance  had been  constant  over the  entire  period.  Average  annual
     returns smooth out variations in a fund's return;  they are not the same as
     fiscal year-by-year results. For fiscal year-by-year returns,  please refer
     to the "Financial Highlights" on pages 37-42.

Statistical Terminology

o    Number of Securities--the  number of different securities held by a fund on
     a given date.

o    Anticipated  Growth  Rate  (AGR)--the  annualized  rate of  return  that an
     investor "locks in" after investing in a portfolio on a specific day.

o    Weighted  Average  Maturity  (WAM)--a  measurement of the  sensitivity of a
     fixed-income  portfolio to interest rate changes. WAM indicates the average
     time until the  securities  in the  portfolio  mature,  weighted  by dollar
     amount.

o    WAM Date (Weighted Average Maturity Date)--an average of the maturity dates
     of a portfolio's  securities,  weighted by dollar  amount.  The WAM date is
     calculated based on the WAM of the portfolio's investments on a given day.

o    Anticipated Value at Maturity (AVM)--the  calculated  redemption value of a
     portfolio  share on the portfolio's WAM date. The portfolios are managed to
     have an AVM of approximately $100.

o    Expense  Ratio--the   operating  expenses  of  the  fund,  expressed  as  a
     percentage  of average  net assets.  Shareholders  pay an annual fee to the
     investment  advisor for investment  advisory and management  services.  The
     expenses and fees are deducted from fund income, not from each shareholder.
     The annual fee has a contractual expense limit guarantee based on the terms
     of the Investment Advisory Agreement. (See Note 2 in the Notes to Financial
     Statements.) 

Types of Securities

o    Zero-Coupon Bonds  (Zeros)--bonds  that make no periodic interest payments.
     Instead,  they are sold at a deep discount and then redeemed for their full
     face value at maturity. When held to maturity, a zero's entire return comes
     from the difference between its purchase price and its value at maturity.

Types of Zeros

o    STRIPS   (Separate   Trading  of  Registered   Interest  and  Principal  of
     Securities)--the    U.S.   Treasury    Department   program   that   allows
     broker-dealers  to "strip" Treasury  securities into their component parts.
     The  securities  created  by this  "stripping"  activity  are also known as
     STRIPS.  STRIPS are direct  obligations of the U.S.  government and are the
     most liquid (easily bought and sold) Treasury zeros.

o    REFCORPs (Resolution Funding Corporation  zeros)--zeros  created from bonds
     issued by the Resolution Funding Corporation, a U.S. government agency. The
     principal  portions of these bonds are secured by Treasury  zeros,  and the
     interest  portions are guaranteed by the U.S.  Treasury.  REFCORPs are also
     relatively liquid.

o    Receipt Zeros--zeros created and issued by broker-dealers before the STRIPS
     program was  implemented  in 1985.  The  effective  maturities  of existing
     receipt zeros do not extend  beyond 2009.  Broker-dealers  created  receipt
     zeros by purchasing  Treasury  bonds,  depositing them in a custodian bank,
     and then selling receipts representing ownership interest in the coupons or
     principal  portions  of the bonds.  The  custodial  accounts  that hold the
     underlying  Treasury  bonds are kept separate from the bank's  assets.  The
     types of receipt zeros include:

     CATS  (Certificates of Accrual of Treasury  Securities)--issued  by Salomon
     Brothers, Inc.

     TRs (Treasury Receipts)--general receipt zeros.

     ETRs (Easy-growth Treasury Receipts)--issued by Dean Witter Reynolds, Inc.


Semiannual Report                                                  Glossary   45


[american century logo]
American
Century(sm)

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

Person-to-Person Assistance:
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 816-7444-3485

Fax: 816-340-7962

Internet: www.americancentury.com


AMERICAN CENTURY TARGET MATURITIES TRUST


Investment Manager
BENHAM MANAGEMENT CORPORATION


This  report  and  the   statements   it
contains are  submitted  for the general
information  of  our  shareholders.  The
report    is    not    authorized    for
distribution  to  prospective  investors
unless  preceded  or  accompanied  by an
effective prospectus.

American Century Investment Services, Inc.


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