AMERICAN CENTURY GOVERNMENT INCOME TRUST
N-30D, 1999-05-28
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[front cover]
                                                                 MARCH 31, 1999

ANNUAL REPORT
- -----------------
AMERICAN CENTURY

    [graphic of stairs]

- -----------------------
SHORT-TERM TREASURY
INTERMEDIATE-TERM TREASURY
LONG-TERM TREASURY

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


[inside front cover]

AMERICAN CENTURY KEEPS WITH TRADITION
- --------------------------------------------------------------------------------

FOLLOWING BENHAM'S FOOTSTEPS

On March 1, we made it easier for you to do business with us. We simplified  our
organizational  structure by  eliminating  the  venerable  Benham and  Twentieth
Century names, and putting all our funds under American Century. The name change
will not affect your funds' investment  management--the proven Benham investment
philosophy, experienced portfolio management teams, and legacy of innovation and
high-quality performance remain.

CONSISTENT,  SOLID  PERFORMANCE--We'll  continue  to  adhere  to the  investment
practices  that have  helped  our  fixed-income  funds  perform so well over the
years. In 1998,  two-thirds of American Century bond funds beat their peer group
average, according to Lipper, Inc.

CONSISTENT  INVESTMENT  PHILOSOPHY--American  Century  fixed-income  funds  will
continue to offer a "pure play" on their sector of the market, as they did under
Benham.

CONTINUITY  OF THE  MANAGEMENT  TEAM--The  investment  process  is not all  that
remains  the same;  we've  retained  our core team of  experienced  fixed-income
portfolio managers.

    *  Experience--The  more than 35 fixed-income  investment  professionals  at
       American  Century have an average of nine years of investment  management
       experience.

    *  Bigger and better--Since  American Century was formed,  we've doubled the
       size  of the  original  Benham  management  team  in our  Mountain  View,
       California office.

TRADITION OF INNOVATION--Like  Benham before it, American Century is a leader in
fixed-income  fund  innovation.  For example,  we introduced a total of four new
fixed-income  funds  in the  last  three  years,  including  the  first  no-load
inflation-adjusted bond fund.

We continue to run our fixed-income operation from our offices in Mountain View,
California, which is also home to our walk-in Investor Center.

We look forward to continuing to meet your fixed-income  investment needs in the
Benham tradition.

WHAT'S NEW . . .

     We now classify our funds in easy-to-remember categories based on objective
and risk. The four  objective  categories  are:  CAPITAL  PRESERVATION,  INCOME,
GROWTH AND INCOME,  and GROWTH.  The three risk  categories  are:  CONSERVATIVE,
MODERATE,  and AGGRESSIVE.  This new  classification  system makes it easier for
investors to identify which funds are right for them.

     Turn to the  inside  back  cover of this  report to see a list of the funds
classified by objective and risk. For  definitions of the fund  categories,  see
the Glossary.

Past performance is no guarantee of future results.

[left margin]

SHORT-TERM TREASURY
(BSTAX)
- ------------------------------

INTERMEDIATE-TERM TREASURY
(CPTNX)
- ------------------------------

LONG-TERM TREASURY
(BLAGX)
- ------------------------------


Our Message to You
- --------------------------------------------------------------------------------
/photo of James E. Stowers III and James E. Stowers, Jr./
James E. Stowers III, seated, with James E. Stowers, Jr.

     The U.S. Treasury bond market experienced a remarkable  reversal during the
year ended March 31, 1999.  When we last addressed you in the semiannual  report
for Short-,  Intermediate-,  and Long-Term Treasury,  yields had just plunged as
investors  rushed to the relative  safety and liquidity of Treasury  securities.
Investors  were spooked by global  economic and  financial  turmoil,  which also
motivated the Federal Reserve (the U.S. central bank) to cut short-term interest
rates to bolster a seemingly  vulnerable U.S. economy and help stabilize markets
worldwide.

     The Fed's actions  helped turn things  around.  By January  1999,  overseas
economies were  stabilizing,  the U.S.  economy was posting  strong growth,  and
investor confidence had rebounded. As a result, investors moved out of Treasurys
into stocks and  higher-yielding  bonds. Yields rose, though they still remained
significantly lower than they were a year earlier.

     It  was  also  an  exciting  period  at  American  Century.  In  March,  we
consolidated all our funds under the American Century name.  Though we are proud
of the venerable Twentieth Century and Benham names, we believe the change makes
it simpler for you to identify your funds.

     We also reclassified all 71 of our funds based on investment goals and risk
levels,  so you can more  easily  choose  the funds  that are  right for you.  A
complete list of American Century funds,  arranged by their new classifications,
is on the inside back cover of this report.

     In   addition,   we've  made  some   enhancements   to  our  Web  site  (at
www.americancentury.com).  Among the new  features  are daily fund  information,
including  return and price data,  market and national  news, and a Forms Center
with access to the most-requested investor forms and applications.  You can also
sign up to receive fund prospectuses and shareholder reports electronically.

     Finally,  here's our latest Year 2000  Readiness  Disclosure.  Our critical
systems have been renovated,  tested, and returned to production. We continue to
test these  systems,  as well as  participate  in  industry-wide  tests with our
business partners.

     As always, we appreciate your continued confidence in American Century.

Sincerely,

/s/James E. Stowers, Jr.                 /s/James E. Stowers III
James E. Stowers, Jr.                    James E. Stowers III
Chairman of the Board and Founder        Chief Executive Officer

[right margin]

                 Table of Contents
   Report Highlights ......................................................    2
   Market Perspective .....................................................    3
SHORT-TERM TREASURY
   Performance Information ................................................    4
   Management Q&A .........................................................    5
   Portfolio at a Glance ..................................................    5
   Schedule of Investments ................................................    8
INTERMEDIATE-TERM TREASURY
   Performance Information ................................................    9
   Management Q&A .........................................................   10
   Portfolio at a Glance ..................................................   10
   Schedule of Investments ................................................   13
LONG-TERM TREASURY
   Performance Information ................................................   14
   Management Q&A .........................................................   15
   Portfolio at a Glance ..................................................   15
   Schedule of Investments ................................................   18
FINANCIAL STATEMENTS
   Statements of Assets and
      Liabilities .........................................................   19
   Statements of Operations ...............................................   20
   Statements of Changes
      in Net Assets .......................................................   21
   Notes to Financial
      Statements ..........................................................   22
   Financial Highlights ...................................................   26
   Report of Independent
      Accountants .........................................................   32
OTHER INFORMATION
   Share Class and Retirement
      Account Information .................................................   33
   Background Information
      Investment Philosophy
         and Policies .....................................................   34
      Comparative Indices .................................................   34
      Lipper Rankings .....................................................   34
      Investment Team
         Leaders ..........................................................   34
   Glossary ...............................................................   35


                                                  www.americancentury.com      1


Report Highlights
- --------------------------------------------------------------------------------

MARKET PERSPECTIVE

*   U.S.  Treasury and agency bonds posted  positive  returns for the year ended
    March 31, 1999, despite severe market volatility.

*   Treasurys  rallied during the late summer and early fall of 1998 in response
    to global economic and financial turmoil.

*   Global  instability  also  prompted  the Federal  Reserve to cut  short-term
    interest rates for the first time in three years.

*   The Fed's actions helped stabilize world financial markets, restored
    investor confidence, and triggered a rebound by the U.S. stock market.

*   As the  global  economy  strengthened,  investors  began  to  switch  out of
    Treasurys  and  back  into  stocks  and   higher-yielding   bonds.   Agencys
    outperformed Treasurys during the first quarter of 1999.

SHORT-TERM TREASURY

*   The fund's  one-year  return fell just short of the average  total return of
    its Lipper peer group.

*   Short-Term  Treasury's  duration  was  more  conservative  than  that of the
    average short-term Treasury fund.

*   Because the fund had a relatively short duration, it outperformed its Lipper
    peer group when rates rose and underperformed when rates declined.

*   The portfolio's Treasury holdings increased a little and its agency exposure
    declined a bit because  some agency  holdings  were  "called"  away prior to
    maturity.

*   We'll likely keep the fund's duration  position  relatively  short, with the
    bulk of assets remaining in "off-the-run" (older) Treasurys.

INTERMEDIATE-TERM TREASURY

*   The fund's one-year return stayed slightly ahead of the average total return
    of its Lipper peer group.

*   A slightly long duration  helped  Intermediate-Term  Treasury  capture extra
    price appreciation when interest rates declined in the third quarter of last
    year.  But  the  longer  duration  detracted  from  performance  when  rates
    rebounded in the fourth quarter.

*   We  tempered  the  long  duration   stance  at  the  beginning  of  1999  in
    anticipation of higher Treasury yields, which indeed rose dramatically.

*   We sold our agency holdings and invested the proceeds in Treasurys.

*   In anticipation of a flatter  Treasury yield curve, we plan to "barbell" the
    portfolio--overweight the short and long ends and underweight the middle.

*   We're  also  likely to  maintain  a slightly  shorter  duration,  given that
    interest  rates  don't  appear  likely to decline  dramatically.  We'll also
    continue our  emphasis on  Treasurys  until  agencys  offer higher  relative
    yields.

LONG-TERM TREASURY

*   The fund's one-year return was in line with the general performance of
    long-term U.S. Treasury bonds.

*   Long-Term  Treasury  outperformed its Lipper peer group for the year because
    of its relatively long duration and a below-average expense ratio.

*   We shortened the  portfolio's  duration in January 1999 in  anticipation  of
    higher Treasury yields.

*   We plan to keep  duration  around 10 years and  maintain  the  fund's  heavy
    weighting toward Treasury bonds.

[left margin]

             SHORT-TERM TREASURY(1)
                      (BSTAX)
TOTAL RETURNS:                     AS OF 3/31/99
    6 Months                            1.15%(2)
    1 Year                                 5.60%
30-DAY SEC YIELD:                          4.66%
INCEPTION DATE:                           9/8/92
NET ASSETS:                     $64.9 million(3)

          INTERMEDIATE-TERM TREASURY(1)
                      (CPTNX)
TOTAL RETURNS:                     AS OF 3/31/99
    6 Months                           -1.76%(2)
    1 Year                                 6.09%
30-DAY SEC YIELD:                          4.83%
INCEPTION DATE:                          5/16/80
NET ASSETS:                    $441.6 million(3)

              LONG-TERM TREASURY(1)
                      (BLAGX)
TOTAL RETURNS:                     AS OF 3/31/99
    6 Months                           -4.93%(2)
    1 Year                                 6.33%
30-DAY SEC YIELD:                          5.46%
INCEPTION DATE:                           9/8/92
NET ASSETS:                    $140.1 million(3)

(1)  Investor Class.
(2)  Not annualized.
(3)  Includes Investor and Advisor Classes.

See Total  Returns on pages 4, 9, and 14.  Investment  terms are  defined in the
Glossary on pages 35-36.


2      1-800-345-2021


Market Perspective from Randall W. Merk
- --------------------------------------------------------------------------------
/photo of Randall W. Merk/
Randall W. Merk, chief investment officer of fixed income

VOLATILE BUT POSITIVE PERFORMANCE

     U.S. Treasury and agency securities posted positive returns during the year
ended March 31, 1999 (see the accompanying  return table),  despite some jarring
reversals in economic  expectations.  Bond yields fell  initially in response to
global  economic  turmoil.  But yields  rose later when the crises  proved  less
troublesome than originally feared.

INVESTORS SEEK SAFETY

     Until last summer,  the U.S.  bond  outlook  wasn't  especially  promising.
Investors  worried  that  strong  U.S.  economic  growth  in 1998  might  ignite
inflation.  That changed  dramatically  last July when  protracted  economic and
financial  problems  in Asia and  Latin  America  threatened  to  dampen  global
economic  growth.  Defensive-minded  investors  sought  refuge in U.S.  Treasury
bonds,  historically  viewed as some of the safest and most  liquid  investments
during times of crisis.  In addition,  to stem the  expanding  global credit and
financial  crisis  and boost  the U.S.  economy,  the  Federal  Reserve  lowered
short-term interest rates three times last fall. By October,  long-term Treasury
yields  had  fallen  to  their  lowest  levels  in  nearly  30  years  (see  the
accompanying  yield  curves  graph).   Treasurys  were  an  effective  portfolio
diversifier when investor confidence and global equity values plummeted as well.

INVESTOR SENTIMENT SHIFTS AGAIN

     By late 1998,  the Fed's  actions  seemed to have achieved  their  intended
result.  The pace of U.S. economic growth  accelerated,  and troubled  economies
overseas appeared more stable.  Amid a more upbeat world economic view, investor
demand  for the  safety  of U.S.  Treasurys  began to fade.  Instead,  investors
increasingly  favored  investments  with higher  yields and better  total return
potential, causing Treasury prices to fall and Treasury yields to rise. However,
Treasurys didn't give up all of their earlier price gains.

YIELD SPREADS WIDEN, THEN NARROW

     The  performance  of agency  securities  ran  counter to  Treasurys.  While
Treasurys rallied strongly in the fall, government agency securities languished,
causing the yield difference  (spread)  between  Treasurys and agencys to widen.
Agencys  typically have higher yields than Treasurys  (because  they're slightly
less liquid and have a little  more credit  risk),  and these  differences  were
exacerbated by the global financial crisis.

     However,  growing investor  optimism at the end of 1998 helped reverse that
trend.  Rather than safety,  investors  focused on higher yields,  which agencys
offered.  As a result,  agencys outpaced Treasurys during the first three months
of 1999.

[right margin]

"U.S. TREASURY AND AGENCY SECURITIES POSTED POSITIVE RETURNS DURING THE YEAR
ENDED MARCH 31, 1999, DESPITE SOME JARRING REVERSALS IN ECONOMIC EXPECTATIONS."

BOND INDEX RETURNS
FOR THE YEAR ENDED MARCH 31, 1999
   SALOMON BROTHERS 1- TO 3-YEAR
      TREASURY/AGENCY INDEX             6.10%
   SALOMON BROTHERS 3- TO 10-YEAR
      TREASURY INDEX                    7.10%
   SALOMON BROTHERS LONG-TERM
      TREASURY/AGENCY INDEX             6.92%

Source: Russell/Mellon Analytical Services

[line graph - data below]

SHIFTING TREASURY YIELD CURVES

                     3/31/98         10/5/98         3/31/99
YEARS TO MATURITY
1                     5.52%           4.35%           4.91%
2                     5.57%           4.06%           5.04%
3                     5.62%           4.13%           5.12%
4                     5.64%           4.22%           5.21%
5                     5.62%           4.07%           5.13%
6                     5.67%           4.08%           5.27%
7                     5.71%           4.09%           5.40%
8                     5.69%           4.08%           5.33%
9                     5.67%           4.07%           5.27%
10                    5.65%           4.07%           5.21%
11                    5.69%           4.18%           5.31%
12                    5.73%           4.30%           5.41%
13                    5.77%           4.42%           5.51%
14                    5.84%           4.54%           5.62%
15                    5.87%           4.65%           5.72%
16                    5.89%           4.69%           5.76%
17                    5.91%           4.74%           5.80%
18                    5.93%           4.79%           5.84%
19                    5.95%           4.84%           5.88%
20                    5.99%           4.88%           5.91%
21                    5.99%           4.89%           5.90%
22                    5.99%           4.91%           5.89%
23                    6.00%           4.93%           5.89%
24                    6.00%           4.95%           5.88%
25                    6.01%           4.97%           5.87%
26                    6.00%           4.92%           5.84%
27                    5.98%           4.87%           5.80%
28                    5.97%           4.82%           5.76%
29                    5.96%           4.77%           5.72%
30                    5.94%           4.71%           5.68%

Source: Bloomberg Financial Markets


                                                  www.americancentury.com      3


Short-Term Treasury--Performance
- --------------------------------------------------------------------------------

<TABLE>
TOTAL RETURNS AS OF MARCH 31, 1999

                                 INVESTOR CLASS (INCEPTION 9/8/92)                           ADVISOR CLASS (INCEPTION 10/6/97)
                   SHORT-TERM   SALOMON 1- TO 3-YR.      SHORT U.S. TREASURY FUNDS(3)       SHORT-TERM   SALOMON 1- TO 3-YR.
                    TREASURY   TREAS./AGENCY INDEX(2)   AVERAGE RETURN   FUND'S RANKING      TREASURY   TREAS./AGENCY INDEX(2)
<S>                   <C>           <C>                   <C>            <C>                  <C>             <C>
6 MONTHS(1)           1.15%           1.37%                 0.65%              --              1.02%           1.37%
1 YEAR                5.60%           6.10%                 5.65%         12 OUT OF 25         5.34%           6.10%
==========================================================================================================================
AVERAGE ANNUAL RETURNS
==========================================================================================================================
3 YEARS               5.70%           6.30%                 5.80%         10 OUT OF 18          --              --
5 YEARS               5.53%           6.18%                 5.80%          9 OUT OF 15          --              --
LIFE OF FUND          4.96%           5.52%(4)             5.10%(4)       5 OUT OF 8(4)        5.32%          6.02%(5)
</TABLE>

(1)  Returns for periods less than one year are not annualized.

(2)  The fund's  benchmark  was changed from the Lehman 1- to 3-Year  Government
     Index to the Salomon Brothers 1- to 3-Year Treasury/Agency Index. In future
     reports,  only the Salomon Brothers Index will be used for fund performance
     comparisons.

(3)  According to Lipper Inc., an independent mutual fund ranking service.

(4)  Since  9/30/92,  the date nearest the class's  inception for which data are
     available.

(5)  Since 10/31/97,  the date nearest the class's  inception for which data are
     available.

See  pages  33-35  for  more  information  about  share  classes,  returns,  the
comparative index, and Lipper fund rankings.

[mountain graph - data below]

GROWTH OF $10,000 OVER LIFE OF FUND Value on 3/31/99 Salomon 1- to 3-Year
   Treasury/Agency Index      $14,255
Lehman 1- to 3-Year
   Govt. Index                $14,190
Short-Term Treasury           $13,697

               Short-Term        Salomon 1- to 3-Year     Lehman 1- to 3-Year
                Treasury         Treasury/Agency Index        Govt. Index
DATE              VALUE                  VALUE                  VALUE
9/30/92          $10,000                $10,000                $10,000
12/31/92          $9,992                $10,022                $10,021
3/31/93          $10,247                $10,236                $10,238
6/30/93          $10,355                $10,351                $10,352
9/30/93          $10,480                $10,498                $10,494
12/31/93         $10,525                $10,562                $10,561
3/31/94          $10,468                $10,510                $10,509
6/30/94          $10,466                $10,515                $10,509
9/30/94          $10,553                $10,616                $10,614
12/31/94         $10,541                $10,672                $10,615
3/31/95          $10,872                $11,022                $10,968
6/30/95          $11,187                $11,369                $11,315
9/30/95          $11,334                $11,534                $11,484
12/31/95         $11,589                $11,819                $11,766
3/31/96          $11,602                $11,867                $11,811
6/30/96          $11,689                $11,989                $11,935
9/30/96          $11,862                $12,188                $12,135
12/31/96         $12,066                $12,416                $12,364
3/31/97          $12,138                $12,501                $12,443
6/30/97          $12,381                $12,773                $12,720
9/30/97          $12,604                $13,024                $12,970
12/31/97         $12,803                $13,244                $13,187
3/31/98          $12,974                $13,435                $13,375
6/30/98          $13,160                $13,641                $13,581
9/30/98          $13,546                $14,062                $13,997
12/31/98         $13,627                $14,168                $14,104
3/31/99          $13,697                $14,255                $14,190

$10,000 investment made 9/30/92*

The graph at left shows the growth of a $10,000  investment over the life of the
fund,  while the graph  below  shows the fund's  year-by-year  performance.  The
Salomon  1- to  3-Year  Treasury/Agency  Index  and  the  Lehman  1-  to  3-Year
Government  Index are provided for  comparison  in the Growth of $10,000  graph.
Short-Term   Treasury's  total  returns  include  operating  expenses  (such  as
transaction  costs and  management  fees) that reduce  returns,  while the total
returns of the indices do not.  These graphs are based on Investor  Class shares
only;  performance  for  other  classes  will  vary  due to  differences  in fee
structures (see Total Returns table above).  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.

[bar graph - data below]

ONE-YEAR RETURNS OVER LIFE OF FUND (PERIODS ENDED MARCH 31)
                    Short-Term       Salomon 1- to 3-Year
                     Treasury       Treasury/Agency Index
DATE                  RETURN               RETURN
3/31/93*               2.45%                2.37%
3/31/94                2.16%                2.67%
3/31/95                3.85%                4.35%
3/31/96                6.71%                7.66%
3/31/97                4.62%                5.34%
3/31/98                6.89%                7.47%
3/31/99                5.60%                6.10%

* From 9/30/92 (the date nearest the class's  inception for which index data are
  available).


4      1-800-345-2021


Short-Term Treasury--Q&A
- --------------------------------------------------------------------------------
/photo of Newlin Rankin/

     An  interview  with  Newlin  Rankin,  a portfolio  manager on the  American
Century government bonds investment team.

HOW DID SHORT-TERM TREASURY PERFORM DURING THE YEAR ENDED MARCH 31, 1999?

     The fund  provided a total  return of 5.60%.* The fund's  results fell just
short of the  5.65%  average  total  return of 25 "Short  U.S.  Treasury  Funds"
tracked  by  Lipper  Inc.  (See the  previous  page for  additional  performance
comparisons.)

WHY WAS THE FUND'S  BENCHMARK  CHANGED  FROM THE LEHMAN 1- TO 3-YEAR  GOVERNMENT
INDEX TO THE SALOMON BROTHERS 1- TO 3-YEAR TREASURY/AGENCY INDEX?

     The  Salomon  Brothers  index,  unlike the Lehman  index,  provides a daily
breakdown of its individual bond holdings and their prices.  This allows us much
more accurate  tracking of the benchmark and consequently more exact modeling of
Short-Term Treasury's portfolio.

HOW DID YOU POSITION THE PORTFOLIO?

     We kept  Short-Term  Treasury's  duration  under  two years for most of the
period,  which was a more  conservative  position  than the one  employed by the
average short-term  Treasury fund.  (Duration is a measure of a bond portfolio's
interest rate sensitivity; the longer the duration, the more a bond fund's share
price will rise or fall when rates change.)

     A  portfolio  with a  duration  of two  years  will  experience  about a 2%
increase in value when interest rates decline 100 basis points  (1.00%--a  basis
point equals  0.01%).  By contrast,  a portfolio  with a duration of three years
would  have  enjoyed  a 3%  increase  in  value  under  the same  interest  rate
conditions.

     Because the fund had a  relatively  short  duration,  it  outperformed  its
Lipper peer group when rates rose and bond values  fell--as they did during much
of the first quarter of 1999--and  underperformed  when rates  declined and bond
prices rallied--as they did last fall.

WHAT CHANGES DID YOU MAKE TO SHORT-TERM  TREASURY'S ASSET ALLOCATION  DURING THE
PAST SIX MONTHS?

     Our Treasury  holdings  increased a bit and our agency  holdings  declined,
primarily  because  some agency  holdings  were  "called"  away from us prior to
maturity. Calls generally occur in falling interest rate environments when

* All fund returns referenced in this interview are for Investor Class shares.

[right margin]

"BECAUSE THE FUND HAD A RELATIVELY SHORT DURATION, IT OUTPERFORMED ITS LIPPER
PEER GROUP WHEN RATES ROSE. . . AND UNDERPERFORMED WHEN RATES DECLINED."

PORTFOLIO AT A GLANCE
                              3/31/99           3/31/98
NUMBER OF SECURITIES             8                16
WEIGHTED AVERAGE
  MATURITY                    2.2 YRS           1.7 YRS
AVERAGE DURATION              2.1 YRS           1.5 YRS
EXPENSE RATIO (FOR
  INVESTOR CLASS)              0.51%             0.55%

YIELD AS OF MARCH 31, 1999
                             INVESTOR            ADVISOR
                               CLASS              CLASS
30-DAY SEC YIELD               4.66%             4.41%

Investment terms are defined in the Glossary on pages 35-36.


                                                  www.americancentury.com      5



Short-Term Treasury--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

bond issuers can refinance their debt at lower rates. We redeployed the proceeds
from the called  agency  bonds  into  Treasurys.  That's  why the fund's  agency
position fell to 16% as of March 31, 1999,  while its Treasury  exposure grew to
79% (see the chart at left).

     To help immunize the portfolio from  inopportune  calls, we actively looked
for  non-callable  bonds,  which can't be redeemed by the issuer  prior to their
original  maturity  date.  Besides having to reinvest money from called bonds at
lower rates,  investors  tend to dislike  callable  bonds  because  their prices
typically lag during market rallies.

     The first dates when issuers may call bonds are specified in the prospectus
of every security that has a call provision.  The market tends to price callable
bonds  based on that first  available  call date.  In effect,  that means a call
feature can shorten a bond's  duration,  which can prevent it from receiving the
full benefit of a market rally.

WHAT OTHER TYPES OF AGENCY SECURITIES DID YOU FAVOR?

     We  typically  invested  in bonds  issued by large,  well-known  government
issuers  such as the Federal  Farm  Credit Bank and the Federal  Home Loan Bank.
Those securities tend to be more liquid--more easily bought and sold--than those
issued by smaller, less well- known entities.

WHAT CHOICES DID YOU MAKE IN THE TREASURY SECTOR?

     We emphasized older  securities,  known as "off-the-run"  Treasurys.  These
securities   typically  have  slightly   higher   yields--and   more  attractive
prices--than the most recently issued, or "on-the-run," Treasurys.

     Unfortunately,   off-the-run  Treasurys   underperformed  newer  securities
throughout  the  final  months  of 1998.  As global  uncertainty  prompted  more
investors to buy Treasurys,  they flocked to more liquid, on-the-run securities.
The yield  difference--or  spread--between  the on-the-run two-year bond and the
previous issue widened from nothing in July to 20 basis points in October.  As a
result,  we were able to  invest in older  short-term  Treasurys  at  attractive
yields.

     In the first quarter of 1999,  off-the-run securities gained some ground on
more recently  issued  Treasurys as the yield spread  between the two tightened.
Increasing  confidence in the global  economy caused bond investors to gravitate
toward any bonds--including off-the-run Treasurys--that offered more yield.

[left margin]

"OUR TREASURY HOLDINGS INCREASED A BIT AND  OUR AGENCY HOLDINGS DECLINED,
PRIMARILY BECAUSE SOME AGENCY HOLDINGS WERE 'CALLED' AWAY FROM US PRIOR  TO
MATURITY."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF MARCH 31, 1999
Treasury Notes              78%
Agency Notes                16%
Agency Discount Notes        5%
STRIPS                       1%

AS OF SEPTEMBER 30, 1998
Treasury Notes              74%
Agency Notes                22%
Repos                        3%
STRIPS                       1%

Security types are defined on pages 35-36.


6      1-800-345-2021


Short-Term Treasury--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHAT IS YOUR OUTLOOK FOR INTEREST RATES?

     We think interest  rates will remain  roughly where they are now,  although
they are likely to bounce around a bit in response to the latest  economic news.
The U.S. economy remains strong,  and Asian and Latin American economies seem to
be improving.

     In light of brisk domestic  economic growth, we believe there's little need
for the Federal Reserve to lower interest rates. On the other hand, inflation is
nearly  non-existent,  so there  doesn't seem to be much  evidence to support an
interest rate hike either. Furthermore, U.S. rates remain high relative to those
in other parts of the world.

     A Fed rate  increase  would boost the value of the U.S.  dollar and further
destabilize already weak foreign  currencies.  Unless U.S. economic growth slows
substantially  or inflation picks up  significantly,  we believe  interest rates
will remain relatively stable.

WITH THAT OUTLOOK IN MIND, WHAT'S YOUR STRATEGY GOING FORWARD?

     We're likely to keep duration  relatively short,  around two years.  That's
what we typically do when there's little  evidence that rates are poised to move
significantly  higher or lower. But we'll make adjustments if we think there's a
compelling reason for interest rates to make a big move.

     We also plan to maintain the fund's current asset allocation, with the bulk
of  assets  in  off-the-run  Treasurys  and the  remainder  in  higher-yielding,
non-callable   agency   securities.   We'll  continue  to  look  for  attractive
opportunities to selectively add agency  securities as a way to boost the fund's
yield.

[right margin]

"WE TYPICALLY INVESTED IN BONDS ISSUED BY LARGE, WELL-KNOWN GOVERNMENT ISSUERS
SUCH AS THE FEDERAL FARM CREDIT BANK  AND THE FEDERAL HOME LOAN BANK."

[pie charts - data below]

PORTFOLIO COMPOSITION BY AGENCY HOLDINGS

AS OF MARCH 31, 1999
Federal Home Loan Bank          69%
Federal Farm Credit Bank        31%

AS OF SEPTEMBER 30, 1998
Federal Home Loan Bank          49%
Federal Farm Credit Bank        33%
Student Loan Marketing Assoc.   18%


                                                  www.americancentury.com      7


Short-Term Treasury--Schedule of Investments
- --------------------------------------------------------------------------------

MARCH 31, 1999

Principal Amount                                                      Value
- --------------------------------------------------------------------------------
U.S. TREASURY SECURITIES--79.2%
             $    750,000  U.S. Treasury STRIPS, 6.03%,
                              5/15/99(1)                          $   745,803
                8,000,000  U.S. Treasury Notes, 8.75%,
                              8/15/00                               8,397,643
               40,000,000  U.S. Treasury Notes, 7.50%,
                              11/15/01                             42,344,705
                                                                 -------------
TOTAL U.S. TREASURY SECURITIES                                     51,488,151
                                                                 -------------
   (Cost $51,491,352)

U.S. GOVERNMENT AGENCY SECURITIES--15.9%
                1,000,000  FFCB MTN, 6.125%, 10/22/99               1,006,574
                3,000,000  FFCB MTN, 8.90%, 6/6/00                  3,127,232
                2,100,000  FHLB, 6.06%, 7/28/00                     2,124,128
                4,000,000  FHLB, 5.97%, 12/11/00                    4,052,863
                                                                 -------------

TOTAL U.S. GOVERNMENT
AGENCY SECURITIES                                                  10,310,797
                                                                 -------------
   (Cost $10,204,815)

Principal Amount                                                      Value
- --------------------------------------------------------------------------------
U.S. GOVERNMENT AGENCY DISCOUNT NOTES--4.9%
             $  3,190,000  FHLB Discount Notes, 4.80%,
                              4/1/99(2)                           $ 3,190,000
                                                                 -------------
   (Cost $3,190,000)

TOTAL INVESTMENT SECURITIES--100.0%                               $64,988,948
                                                                 =============
   (Cost $64,886,167)

NOTES TO SCHEDULE OF INVESTMENTS

FFCB = Federal Farm Credit Bank

FHLB = Federal Home Loan Bank

MTN = Medium Term Note

STRIPS = Separate Trading of Registered Interest or Principal of Securities

(1)  Zero-coupon   bond.  The  yield  to  maturity  at  purchase  is  indicated.
     Zero-coupon bonds are purchased at a substantial  discount from their value
     at maturity.

(2)  Rate indicated is the yield to maturity at purchase.

- --------------------------------------------------------------------------------
UNDERSTANDING  THE  SCHEDULE  OF  INVESTMENTS--This  schedule  tells  you  which
investments your fund owned on the last day of the reporting period.

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

* the percent and dollar breakdown of each investment category

                                              See Notes to Financial Statements


8      1-800-345-2021


Intermediate-Term Treasury--Performance
- --------------------------------------------------------------------------------

<TABLE>
TOTAL RETURNS AS OF MARCH 31, 1999

                                       INVESTOR CLASS (INCEPTION 5/16/80)                        ADVISOR CLASS (INCEPTION 10/9/97)
                     INTERMEDIATE-    SALOMON 3- TO 10-   INTERMEDIATE U.S. TREASURY FUNDS(2)   INTERMEDIATE-   SALOMON 3- TO 10-
                     TERM TREASURY   YEAR TREASURY INDEX   AVERAGE RETURN   FUND'S RANKING      TERM TREASURY   YEAR TREASURY INDEX
<S>                 <C>              <C>                 <C>                 <C>                  <C>              <C>
6 MONTHS(1)             -1.76%            -1.52%              -1.62%               --               -1.88%           -1.52%
1 YEAR                   6.09%             7.10%               6.05%           8 OUT OF 14           5.83%            7.10%
===============================================================================================================================
AVERAGE ANNUAL RETURNS
===============================================================================================================================
3 YEARS                  7.02%             7.63%               6.82%           5 OUT OF 10            --               --
5 YEARS                  6.59%             7.26%               6.57%           4 OUT OF 8             --               --
10 YEARS                 7.88%             8.41%               7.90%           2 OUT OF 3             --               --
LIFE OF FUND             8.66%            9.67%(3)             8.66%           1 OUT OF 1            6.65%          7.08%(4)
</TABLE>

(1)  Returns for periods less than one year are not annualized.

(2)  According to Lipper Inc., an independent mutual fund ranking service.

(3)  Since  5/31/80,  the date nearest the class's  inception for which data are
     available.

(4)  Since 10/31/97,  the date nearest the class's  inception for which data are
     available.

See  pages  33-35  for  more  information  about  share  classes,  returns,  the
comparative index, and Lipper fund rankings.

[mountain graph - data below]

GROWTH OF $10,000 OVER 10 YEARS
Value on 3/31/99
Salomon 3- to 10-Year
   Treasury Index                $22,420
Intermediate-Term Treasury       $21,359

                   Intermediate-Term    Salomon 3- to 10-Year
                       Treasury            Treasury Index
DATE                    VALUE                  VALUE
3/31/89                $10,000                $10,000
3/31/90                $11,061                $11,127
3/31/91                $12,343                $12,453
3/31/92                $13,567                $13,759
3/31/93                $15,243                $15,431
3/31/94                $15,523                $15,789
3/31/95                $16,073                $16,468
3/31/96                $17,426                $17,981
3/31/97                $18,132                $18,766
3/31/98                $20,134                $20,933
3/31/99                $21,359                $22,420

$10,000 investment made 3/31/89

The graph at left shows the growth of a $10,000  investment  in the fund over 10
years,  while the graph below  shows the fund's  year-by-year  performance.  The
Salomon 3- to 10-Year  Treasury  Index is provided for comparison in each graph.
Intermediate-Term  Treasury's total returns include operating  expenses (such as
transaction  costs and  management  fees) that reduce  returns,  while the total
returns of the index do not.  These  graphs are based on Investor  Class  shares
only;  performance  for  other  classes  will  vary  due to  differences  in fee
structures (see Total Returns table above).  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.

[bar graph - data below]

ONE-YEAR RETURNS OVER 10 YEARS (PERIODS ENDED MARCH 31)
                Intermediate-Term     Salomon 3- 10-Year
                     Treasury           Treasury Index
DATE                  RETURN               RETURN
3/31/90               10.61%               11.27%
3/31/91               11.59%               11.91%
3/31/92                9.92%               10.49%
3/31/93               12.35%               12.15%
3/31/94                1.84%                2.32%
3/31/95                3.54%                4.30%
3/31/96                8.42%                9.18%
3/31/97                4.05%                4.37%
3/31/98               11.04%               11.55%
3/31/99                6.09%                7.10%


                                                  www.americancentury.com      9


Intermediate-Term Treasury--Q&A
- --------------------------------------------------------------------------------
/photo of Bob Gahagan/

     An interview with Bob Gahagan,  a portfolio manager on the American Century
government bonds investment team.

HOW DID INTERMEDIATE-TERM TREASURY PERFORM DURING THE YEAR ENDED MARCH 31, 1999?

     The fund returned  6.09%,* roughly in line with the 6.05% average return of
the 14  "Intermediate  U.S.  Treasury  Funds"  tracked by Lipper  Inc.  (See the
previous page for additional performance comparisons.)

WHAT WERE SOME OF THE KEY FACTORS BEHIND THE FUND'S PERFORMANCE?

     Duration   management  was  the  main   contributor  to   Intermediate-Term
Treasury's   performance.   Duration   measures  a  portfolio's   interest  rate
sensitivity.  Funds with  longer  durations  incur more share  price  changes in
response to interest rate movements. Conversely, shorter-duration funds are less
sensitive to changing rates.

     From April  through  December of last year,  we  maintained a slightly long
duration.  That helped the fund capture extra price  appreciation  when interest
rates and Treasury  yields  declined in the third quarter.  But by  mid-October,
interest  rates  started to climb,  and the  fund's  longer  duration  detracted
somewhat from performance during the fourth quarter.

     The  fund's  holdings  in  government  agency  securities  during the third
quarter also affected performance.  Agency securities  underperformed  Treasurys
during the quarter.

WHAT ADJUSTMENTS HAVE YOU MADE TO INTERMEDIATE-TERM TREASURY'S DURATION SINCE
DECEMBER?

     As we  entered  the new  year,  we  tempered  our long  duration  stance in
anticipation  of higher  Treasury  yields.  That  outlook  stemmed  from several
developments.  First,  the worst of the  global  financial  crisis  seemed to be
behind us. That belief fueled the U.S.  stock market's  recovery,  which boosted
consumer  confidence  and  relieved  fears that U.S.  economic  growth  would be
derailed.

     The introduction of a new unified European currency--the "euro"--also posed
a threat to  Treasury  bond  demand.  We feared that  investors  would pare back
dollar-denominated  Treasurys and buy euro-denominated bonds. Our more defensive
duration  positioning  proved  beneficial  because  interest  rates and Treasury
yields did in fact rise dramatically in February for those reasons and others.

     As of March 31, 1999, the fund's duration was 4.1 years.

* All fund returns referenced in this interview are for Investor Class shares.

[left margin]

"AS WE ENTERED THE NEW YEAR, WE TEMPERED OUR LONG DURATION STANCE IN
ANTICIPATION OF HIGHER TREASURY YIELDS."

PORTFOLIO AT A GLANCE
                              3/31/99           3/31/98
NUMBER OF SECURITIES            18                18
WEIGHTED AVERAGE
   MATURITY                   5.5 YRS           6.1 YRS
AVERAGE DURATION              4.1 YRS           4.4 YRS
EXPENSE RATIO (FOR
   INVESTOR CLASS)             0.51%             0.51%

YIELD AS OF MARCH 31, 1999
                             INVESTOR           ADVISOR
                               CLASS             CLASS
30-DAY SEC YIELD               4.83%             4.57%

Investment terms are defined in the Glossary on pages 35-36.


10      1-800-345-2021


Intermediate-Term Treasury--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHAT MODIFICATIONS DID YOU MAKE TO THE FUND'S ASSET ALLOCATION?

     We sold our agency holdings,  investing the proceeds in Treasury securities
(see the chart at right).  Initially,  we favored agency securities because they
offered  higher yields than  comparable  maturity  Treasurys.  Last spring,  for
example,  a 5-year  agency  security  offered about 15-20 basis points (0.15% to
0.20%--a basis point equals 0.01%) more in yield than a 5-year Treasury.

     By October,  that spread had  doubled in  response to global  economic  and
market  uncertainty.  Faced with growing  concerns about Southeast  Asia,  Latin
America,  Russia,  and hedge fund losses,  investors  worldwide  sought the safe
haven of U.S. Treasurys.

     Agency  securities,  on the other  hand,  were left  behind in this  global
flight to quality. Even though they carry a AAA credit rating and the backing of
the U.S.  government,  agencys are generally less liquid--less easily bought and
sold--and didn't benefit from the same strong demand that favored Treasurys.  In
addition,  the supply of agency  securities  expanded greatly as agencies issued
new debt and refinanced existing debt, which further depressed agency prices and
pushed up yields.

     Given our concern  about how agencys would perform in reaction to continued
global economic turmoil, we used occasional periods of agency market strength to
lighten our agency  holdings in the late third quarter and early fourth  quarter
of 1998. In January 1999, the spread between  Treasurys and agencys continued to
tighten as  investors  started  to favor  higher  yields  over  liquidity.  That
development  also  afforded us  attractive  opportunities  to sell our remaining
holdings. At current spread levels, we favor Treasurys.

WHAT AREAS DID YOU LOOK TO FOR  HIGHER YIELDS?

     Off-the-run,  or older, Treasurys became increasingly attractive last fall.
In July 1998, the yield  difference or "spread"  between an off-the-run  30-year
Treasury bond and a newly issued 30-year  Treasury bond was just 9 basis points.
By the end of October 1998, however,  that spread had widened to nearly 40 basis
points.  Amid the uncertainty  that plagued the world's  financial  markets last
fall,  investors  increasingly  sought  out the most  liquid  bonds  within  the
Treasury  market and often  ignored the  slightly  less liquid,  older  Treasury
securities.

     Given their high  yields--and  anticipating  that the yield spread  between
older and newer  Treasurys  would narrow as fears of a global  crisis  faded--we
added to our holdings in off-the-run  securities in October. From that point on,
yield  spreads  narrowed  and  off-the-run   Treasurys  generally   outperformed
on-the-run securities.

[right margin]

"WE USED OCCASIONAL PERIODS OF MARKET STRENGTH TO LIGHTEN OUR AGENCY HOLDINGS IN
THE LATE THIRD QUARTER AND EARLY FOURTH QUARTER  OF 1998."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF MARCH 31, 1999
Treasury Notes              84%
Treasury Bonds              10%
Repos                        6%

AS OF SEPTEMBER 30, 1998
Treasury Notes              49%
Treasury Bonds              28%
Agency Notes                12%
STRIPS                      11%

Security types are defined on pages 35-36.


                                                 www.americancentury.com      11


Intermediate-Term Treasury--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHY DID YOU ELIMINATE YOUR HOLDINGS IN ZERO-COUPON BONDS (SHOWN AS STRIPS IN THE
BOTTOM CHART ON PAGE 11)?

     Zero-coupon  Treasurys (bonds that don't make regular interest payments and
are very  sensitive  to  changes  in  interest  rates)  outperformed  comparable
interest-paying  Treasurys  last fall after we  established a  zero-coupon  bond
position.

     Interest rates continued to fall, which benefited our position. Zero-coupon
bonds also  perform well when  short-term  yields  decline  more than  long-term
yields (in what's known as a "steepening"  of the Treasury  yield curve),  which
happened last fall.

     However,  we weren't  convinced  that rates would fall  farther or that the
yield  curve  would  continue  to  steepen,  so we  closed  out our  zero-coupon
position.

WHAT'S YOUR OUTLOOK FOR THE U.S. ECONOMY AND INTEREST RATES?

     We expect that U.S.  economic growth will remain  healthy.  There's a small
chance  that the  economy  will slow later this year,  but we believe a slowdown
will be stymied by the turnaround in other parts of the world.  Despite  ongoing
economic  strength,  we think inflation will remain relatively  subdued.  Strong
economic growth with little inflation  should translate into relatively  stable,
but probably higher, interest rates and bond yields.

     We also expect the  Treasury  yield curve to flatten.  By that we mean that
the  difference in yield between  shorter-maturity  securities  and  longer-term
bonds will  decrease  when  longer-term  bond yields  rise less than  short-term
yields.  If the U.S. economy  continues to grow at a moderate,  non-inflationary
pace,  long-term bond yields could indeed rise less than short-term  yields.  In
addition,  the U.S.  economy's recent strong  performance has generated  federal
budget surpluses,  which allow the U.S. Treasury to issue less debt,  especially
long-term debt. The Treasury's  strategy of issuing fewer long-term bonds should
also encourage a flatter curve.

WHAT IS YOUR STRATEGY GOING FORWARD?

     We plan to "barbell" the portfolio. If you think of a barbell, the ends are
heavy and the middle is light. In portfolio terms, that means, for example, that
we'd have heavy  weightings in bonds with maturities of two years or less on the
short end and around 10-20 years on the long end. That  structure  should enable
the fund to perform well if we're correct and the yield curve flattens.

     We're also likely to maintain a slightly shorter  duration,  since we don't
expect interest rates or bond yields to come down dramatically enough to warrant
a more aggressive  stance. We expect to continue our emphasis on Treasurys until
agencys offer much higher yields compared with Treasurys than they do now.

[left margin]

"STRONG ECONOMIC GROWTH WITH LITTLE INFLATION SHOULD TRANSLATE INTO RELATIVELY
STABLE, BUT PROBABLY HIGHER, INTEREST RATES AND BOND YIELDS."


12      1-800-345-2021


Intermediate-Term Treasury--Sch. of Investments
- --------------------------------------------------------------------------------

MARCH 31, 1999

Principal Amount                                                       Value
- --------------------------------------------------------------------------------
U.S. TREASURY SECURITIES--94.4%
             $  4,500,000  U.S. Treasury Notes, 6.25%,
                              10/31/01                            $  4,628,874
                9,400,000  U.S. Treasury Notes, 6.625%,
                              4/30/02                                9,803,336
               11,000,000  U.S. Treasury Notes, 7.50%,
                              5/15/02                               11,738,991
               11,800,000  U.S. Treasury Notes, 6.50%,
                              5/31/02                               12,265,688
               25,500,000  U.S. Treasury Notes, 6.25%,
                              8/31/02                               26,366,312
               26,700,000  U.S. Treasury Notes, 5.75%,
                              10/31/02                              27,216,405
               38,000,000  U.S. Treasury Notes, 5.50%,
                              1/31/03                               38,428,188
               29,000,000  U.S. Treasury Notes, 5.50%,
                              2/28/03                               29,323,452
               24,100,000  U.S. Treasury Notes, 5.50%,
                              3/31/03                               24,375,205
               29,500,000  U.S. Treasury Notes, 5.75%,
                              4/30/03                               30,099,018
               26,900,000  U.S. Treasury Notes, 7.50%,
                              2/15/05                               29,852,205
               33,000,000  U.S. Treasury Notes, 6.50%,
                              5/15/05                               34,991,692
               29,800,000  U.S. Treasury Notes, 6.50%,
                              8/15/05                               31,644,963

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

              $10,000,000  U.S. Treasury Notes, 7.00%,
                              7/15/06                             $ 10,946,305
               34,400,000  U.S. Treasury Notes, 6.50%,
                              10/15/06                              36,673,197
                7,500,000  U.S. Treasury Notes, 6.125%,
                              8/15/07                                7,856,786
               26,800,000  U.S. Treasury Bonds, 9.125%,
                              5/15/09                               31,069,428
               10,000,000  U.S. Treasury Bonds, 8.50%,
                              2/15/20                               13,082,085
                                                                 --------------
TOTAL U.S. TREASURY SECURITIES                                     410,362,130
                                                                 --------------
   (Cost $416,579,526)

TEMPORARY CASH INVESTMENTS--5.6%
   Repurchase Agreement, Morgan Stanley Group,
    Inc., (U.S. Treasury obligations), in a joint
    trading account at 4.90%, dated 3/31/99,
    due 4/1/99 (Delivery value $22,013,996)                         22,011,000
   Repurchase Agreement, State Street Boston
    Corp., (U.S. Treasury obligations), in a joint
    trading account at 4.84%, dated 3/31/99,
    due 4/1/99 (Delivery value $2,436,328)                           2,436,000
                                                                 --------------

TOTAL TEMPORARY CASH INVESTMENTS                                    24,447,000
                                                                 --------------
   (Cost $24,447,000)

TOTAL INVESTMENT SECURITIES--100.0%                               $434,809,130
                                                                 ==============
(Cost $441,026,526)

- --------------------------------------------------------------------------------
UNDERSTANDING  THE  SCHEDULE  OF  INVESTMENTS--This  schedule  tells  you  which
investments your fund owned on the last day of the reporting period.

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

* the percent and dollar breakdown of each investment category

See Notes to Financial Statements


                                                 www.americancentury.com      13


Long-Term Treasury--Performance
- --------------------------------------------------------------------------------

<TABLE>
TOTAL RETURNS AS OF MARCH 31, 1999

                                        INVESTOR CLASS (INCEPTION 9/8/92)                 ADVISOR CLASS (INCEPTION 1/12/98)
                       LONG-TERM   SALOMON LONG-TERM     GENERAL U.S. TREASURY FUNDS(2)    LONG-TERM    SALOMON LONG-TERM
                       TREASURY   TREAS./AGENCY INDEX   AVERAGE RETURN   FUND'S RANKING     TREASURY   TREAS./AGENCY INDEX
<S>                     <C>              <C>            <C>                 <C>             <C>             <C>
6 MONTHS(1)             -4.93%         -5.13%              -3.89%             --             -5.05%          -5.13%
1 YEAR                   6.33%          6.92%               5.06%         8 OUT OF 21         6.07%           6.92%
=======================================================================================================================
AVERAGE ANNUAL RETURNS
=======================================================================================================================
3 YEARS                  9.56%          9.92%               7.55%         2 OUT OF 17          --              --
5 YEARS                  9.03%          9.80%               7.67%         3 OUT OF 14          --              --
LIFE OF FUND             8.30%         9.27%(3)            7.54%(3)       2 OUT OF 10(3)      3.81%          5.54%(4)
</TABLE>

(1)  Returns for periods less than one year are not annualized.

(2)  According to Lipper Inc., an independent mutual fund ranking service.

(3)  Since  9/30/92,  the date nearest the class's  inception for which data are
     available.

(4)  Since  1/31/98,  the date nearest the class's  inception for which data are
     available.

See  pages  33-35  for  more  information  about  share  classes,  returns,  the
comparative index, and Lipper fund rankings.

[mountain graph - data below]

GROWTH OF $10,000 OVER LIFE OF FUND
Value on 3/31/99
Salomon Long-Term
   Treasury/Agency Index          $17,788
Long-Term Treasury                $17,061

                      Long-Term          Salomon Long-Term
                       Treasury        Treasury/Agency Index
DATE                    VALUE                  VALUE
9/30/92                $10,000                $10,000
12/31/92               $10,109                $10,106
3/31/93                $10,766                $10,772
6/30/93                $11,319                $11,364
9/30/93                $12,114                $12,071
12/31/93               $11,892                $11,874
3/31/94                $11,074                $11,145
6/30/94                $10,691                $10,848
9/30/94                $10,617                $10,766
12/31/94               $10,792                $10,959
3/31/95                $11,435                $11,662
6/30/95                $12,633                $12,948
9/30/95                $12,908                $13,244
12/31/95               $13,950                $14,350
3/31/96                $12,974                $13,389
6/30/96                $12,951                $13,369
9/30/96                $13,138                $13,576
12/31/96               $13,759                $14,228
3/31/97                $13,316                $13,787
6/30/97                $14,037                $14,546
9/30/97                $14,855                $15,384
12/31/97               $15,790                $16,375
3/31/98                $16,044                $16,634
6/30/98                $16,735                $17,413
9/30/98                $17,945                $18,749
12/31/98               $17,803                $18,568
3/31/99                $17,061                $17,788

$10,000 investment made 9/30/92*

The graph at left shows the growth of a $10,000  investment over the life of the
fund,  while the graph  below  shows the fund's  year-by-year  performance.  The
Salomon  Long-Term  Treasury/Agency  Index is provided  for  comparison  in each
graph.  Long-Term  Treasury's total returns include operating  expenses (such as
transaction  costs and  management  fees) that reduce  returns,  while the total
returns of the index do not.  These  graphs are based on Investor  Class  shares
only;  performance  for  other  classes  will  vary  due to  differences  in fee
structures (see Total Returns table above).  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.

[bar graph - data below]

ONE-YEAR RETURNS OVER LIFE OF FUND (PERIODS ENDED MARCH 31)
                    Long-Term         Salomon Long-Term
                     Treasury       Treasury/Agency Index
DATE                  RETURN               RETURN
3/31/93*               7.66%                7.72%
3/31/94                2.86%                3.46%
3/31/95                3.25%                4.64%
3/31/96               13.46%               14.81%
3/31/97                2.65%                2.97%
3/31/98               20.48%               20.65%
3/31/99                6.33%                6.92%

* From 9/30/92 (the date nearest the class's  inception for which index data are
  available).


14      1-800-345-2021


Long-Term Treasury--Q&A
- --------------------------------------------------------------------------------
/photo of Dave Schroeder/

     An  interview  with Dave  Schroeder,  a portfolio  manager on the  American
Century government bonds investment team.

HOW DID LONG-TERM TREASURY PERFORM DURING THE YEAR ENDED MARCH 31, 1999?

     Its total  return,  6.33%,*  was in line with the  general  performance  of
long-term U.S. Treasury bonds. The fund outperformed the 5.06% average return of
the 21  "General  U.S.  Treasury  Funds"  tracked  by  Lipper  Inc.  The  fund's
benchmark, the Salomon Brothers Long-Term  Treasury/Agency Index, returned 6.92%
for the year. (See the previous page for additional performance comparisons.)

WHY DID THE FUND OUTPERFORM ITS  PEER GROUP?

     The  primary  reason  for  Long-Term  Treasury's   outperformance  was  its
relatively  long  duration.  A  measure  of a  bond  portfolio's  interest  rate
sensitivity,  duration  can be used to estimate  the  approximate  change in the
share  price of a bond  portfolio  given a 1%  change  in  interest  rates.  For
example,  the share price of a portfolio  with a duration of 10 years would rise
approximately  10% in response to a 1% drop in  interest  rates.  The longer the
duration,  the more the share  price of a bond fund will rise or fall when rates
change.

     We manage the fund to deliver a pure play on the long end of the government
bond market, using the Salomon Brothers Long-Term  Treasury/Agency  Index as our
benchmark.  We keep the fund's  duration  within a year of the  duration  of the
index,  which  currently  is around 10 years.  That's  longer  than the  average
duration of the general Treasury funds in the Lipper category.

     Having a relatively long duration compared with our Lipper peers was a plus
for performance during periods when interest rates declined--such as last autumn
and January of 1999--but detracted from performance when rates rose, as they did
in February.

     Long-Term Treasury's below-average expense ratio was another reason for the
fund's strong  relative  performance.  On March 31, 1999, the fund had an annual
expense ratio of 51 basis points (0.51%--a basis point equals 0.01%). The Lipper
category  average  expense ratio was 92 basis points.  Other things being equal,
lower  expenses  should  translate  into  higher  yields  and  returns  for  our
shareholders.

* All fund returns referenced in this interview are for Investor Class shares.

[right margin]

"THE PRIMARY REASON FOR LONG-TERM TREASURY'S OUTPERFORMANCE  WAS ITS RELATIVELY
LONG DURATION."

PORTFOLIO AT A GLANCE
                             3/31/99          3/31/98
NUMBER OF SECURITIES            9                8
WEIGHTED AVERAGE
   MATURITY                 20.5 YRS          20.3 YRS
AVERAGE DURATION            10.8 YRS          10.5 YRS
EXPENSE RATIO (FOR
   INVESTOR CLASS)            0.51%             0.54%

YIELD AS OF MARCH 31, 1999
                            INVESTOR           ADVISOR
                              CLASS             CLASS
30-DAY SEC YIELD              5.46%             5.19%

Investment terms are defined in the Glossary on pages 35-36.


                                                 www.americancentury.com      15


Long-Term Treasury--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

DID YOU MAKE ANY MODIFICATIONS TO DURATION DURING THE PAST SIX MONTHS?

     Yes, we  shortened  duration  by about half a year in January  based on our
belief that Treasury yields were headed higher.  We felt that the three Treasury
note and bond auctions  scheduled for early  February would expand the supply of
Treasurys and potentially put upward  pressure on yields.  In addition,  we were
worried that investor sentiment was about to shift.

     In January,  Treasury  bond yields still  reflected  expectations  that the
Federal  Reserve might  continue to cut interest  rates,  as it had done in late
1998.  But by  February,  those  expectations  had been wrung out of the market.
First   there   was   news   that   the   economy   had   expanded   at  a  much
faster-than-expected rate in the fourth quarter of 1998.

     Next, investors began to worry about what Fed Chairman Alan Greenspan would
say in his semi-annual  Humphrey-Hawkins  testimony before Congress.  During his
testimony  in  February,  Chairman  Greenspan  hinted that the Fed had adopted a
neutral  stance on  interest  rates  and was not  likely to cut them in the near
term.  Shifting investor  expectations  triggered  dramatically  higher Treasury
yields and sent bond prices lower.

     Because February proved to be one of the Treasury  market's worst months in
years,  the fund's  somewhat  shorter  duration  was a plus.  By late  February,
however,  we felt  that  much of the bad  news had  already  been  reflected  in
Treasury prices. So we lengthened duration back out again to around 10.7 years.

YOU ELIMINATED ALL OF THE PORTFOLIO'S NON-TREASURY BOND HOLDINGS DURING THE PAST
SIX MONTHS (SEE THE CHARTS AT LEFT). WHAT PROMPTED THAT CHANGE IN STRATEGY?

     The  primary  reason was that our agency  holding  began to look  expensive
relative to shorter-term  agency  securities with less risk. At the time we sold
it, its yield was 40 basis points over the yield of a comparable  Treasury bond,
whereas  generic  shorter-term  agency bonds were yielding about 50 basis points
more than  Treasurys.  To hold onto the  agency  bond,  we needed  more yield to
balance the greater risk.

     As for the other sectors,  we generally felt that we could get better value
and less risk in  Treasury  bonds  after  they  underperformed  most  other bond
sectors in the first quarter of 1999.

[left margin]

"WE ALSO PLAN TO MAINTAIN THE FUND'S CURRENT ASSET ALLOCATION BY WEIGHTING IT
HEAVILY TOWARD TREASURY BONDS."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF MARCH 31, 1999
Treasury Bonds             100%

AS OF SEPTEMBER 30, 1998
Treasury Bonds              57%
Agency Bonds                16%
STRIPS                      12%
Repos                        8%
Treasury Inflation-
  Indexed Notes              7%

Security types are defined on pages 35-36.


16      1-800-345-2021


Long-Term Treasury--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHAT IS YOUR OUTLOOK FOR INFLATION AND INTEREST RATES?

     Barring any dramatically  negative  developments on the inflation front, we
believe interest rates will remain relatively stable over the next six months or
so.  We  wouldn't  be  surprised  to see the  consumer  price  index (a  leading
indicator  of  inflation)  increase  at an  annual  rate of  2-3% in 1999  after
increasing  less than 2% in 1998.  The dramatic drop in oil prices helped keep a
lid on inflation last year, but oil prices have rebounded this year. However, we
believe that inflation will remain relatively tame because global overproduction
and  still-soft  demand for many goods and services  has made it  difficult  for
producers to raise prices.

WITH THAT OUTLOOK IN MIND, WHAT'S YOUR STRATEGY GOING FORWARD?

     We plan to keep the  portfolio's  duration around 10 years. We also plan to
maintain the fund's  current  asset  allocation  by weighting it heavily  toward
Treasury  bonds.  At  some  point,  we  may  look  for   opportunities   to  add
inflation-indexed  Treasurys,  which offer protection  against rising prices. If
the  annual  inflation  rate  runs  2% or  higher  for  1999,  inflation-indexed
securities may offer better total return potential than traditional Treasurys.

[right margin]

"WE BELIEVE THAT INFLATION WILL REMAIN RELATIVELY TAME BECAUSE GLOBAL
OVERPRODUCTION AND STILL-SOFT DEMAND FOR MANY GOODS AND SERVICES HAS MADE IT
DIFFICULT FOR PRODUCERS TO RAISE PRICES."


                                                 www.americancentury.com      17


Long-Term Treasury--Schedule of Investments
- --------------------------------------------------------------------------------

MARCH 31, 1999

Principal Amount                                                       Value
- --------------------------------------------------------------------------------
U.S. TREASURY SECURITIES
             $  6,250,000  U.S. Treasury Bonds, 13.25%,
                              5/15/14                             $  9,866,221
               11,800,000  U.S. Treasury Bonds, 11.25%,
                              2/15/15                               18,412,686
               13,300,000  U.S. Treasury Bonds, 7.25%,
                              5/15/16                               15,264,293
               10,500,000  U.S. Treasury Bonds, 8.875%,
                              2/15/19                               14,111,216
                8,000,000  U.S. Treasury Bonds, 8.125%,
                              8/15/19                               10,082,311
               20,000,000  U.S. Treasury Bonds, 8.50%,
                              2/15/20                               26,164,170
               14,000,000  U.S. Treasury Bonds, 8.75%,
                              8/15/20                               18,788,767
               18,500,000  U.S. Treasury Bonds, 6.875%,
                              8/15/25                               20,949,943
                5,000,000  U.S. Treasury Bonds, 6.125%,
                              11/15/27                               5,196,624
                                                                 --------------

TOTAL INVESTMENT SECURITIES--100.0%                               $138,836,231
                                                                 ==============
   (Cost $136,985,955)

- --------------------------------------------------------------------------------
UNDERSTANDING  THE  SCHEDULE  OF  INVESTMENTS--This  schedule  tells  you  which
investments your fund owned on the last day of the reporting period.

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

* the percent and dollar breakdown of each investment category

                                              See Notes to Financial Statements


18      1-800-345-2021


<TABLE>
<CAPTION>
Statements of Assets and Liabilities
- --------------------------------------------------------------------------------

                                           SHORT-TERM  INTERMEDIATE-TERM    LONG-TERM
MARCH 31, 1999                              TREASURY       TREASURY          TREASURY

ASSETS
<S>                                            <C>             <C>              <C>
Investment securities, at value
  (identified cost of $64,886,167,
  $441,026,526, and $136,985,955,
  respectively) (Note 3) ..............   $ 64,988,948   $ 434,809,130    $ 138,836,231
Cash ..................................        998,015         927,368          339,363
Receivable for investments sold .......      8,392,500            --               --
Interest and other receivables ........      1,484,913       6,506,984        1,679,271
                                          ------------   -------------    -------------
                                            75,864,376     442,243,482      140,854,865
                                          ------------   -------------    -------------

LIABILITIES
Payable for investments purchased .....     10,860,402            --               --
Payable for capital shares redeemed ...         51,915         158,363          547,988
Accrued management fees (Note 2) ......         25,726         190,714           61,497
Distribution fees payable (Note 2) ....            630           1,155              473
Service fees payable (Note 2) .........            630           1,155              473
Dividends payable .....................         39,858         278,571          104,669
Payable for trustees' fees and expenses            184           1,870              436
                                          ------------   -------------    -------------
                                            10,979,345         631,828          715,536
                                          ------------   -------------    -------------
Net Assets ............................   $ 64,885,031   $ 441,611,654    $ 140,139,329
                                          ============   =============    =============

NET ASSETS CONSIST OF:
Capital paid in .......................   $ 64,761,277   $ 446,062,648    $ 139,113,017
Accumulated undistributed
  net realized gain (loss)
  on investment transactions ..........         20,973       1,766,402         (823,964)
Net unrealized appreciation
  (depreciation) on investments
  (Note 3) ............................        102,781      (6,217,396)       1,850,276
                                          ------------   -------------    -------------
                                          $ 64,885,031   $ 441,611,654    $ 140,139,329
                                          ============   =============    =============

Investor Class
Net assets ............................   $ 61,783,136   $ 435,494,181    $ 137,551,899
Shares outstanding ....................      6,275,316      41,677,529       13,596,076
Net asset value per share .............   $       9.85   $       10.45    $       10.12

Advisor Class
Net assets ............................   $  3,101,895   $   6,117,473    $   2,587,430
Shares outstanding ....................        315,062         585,453          255,748
Net asset value per share .............   $       9.85   $       10.45    $       10.12
</TABLE>

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF ASSETS AND  LIABILITIES--This  statement details
what the fund owns (assets),  what it owes (liabilities),  and its net assets as
of the last day of the period.  If you subtract  what the fund owes from what it
owns,  you get the fund's net assets.  For each class of shares,  the net assets
divided  by the total  number of  shares  outstanding  gives you the price of an
individual share, or the net asset value per share.

NET ASSETS are also broken down by capital (money invested by shareholders); net
investment  income not yet paid to  shareholders or net investment  losses;  net
gains earned on investments  but not yet paid to  shareholders  or net losses on
investments (known as realized gains or losses); and finally, gains or losses on
securities  still  owned  by the  fund  (known  as  unrealized  appreciation  or
depreciation).  This  breakdown  tells  you the  value  of net  assets  that are
performance-related,  such as investment  gains or losses,  and the value of net
assets that are not related to performance,  such as shareholder investments and
redemptions.

See Notes to Financial Statements


                                                 www.americancentury.com      19


<TABLE>
<CAPTION>
Statements of Operations
- --------------------------------------------------------------------------------

                                         SHORT-TERM   INTERMEDIATE-TERM   LONG-TERM
YEAR ENDED MARCH 31, 1999                 TREASURY        TREASURY         TREASURY

INVESTMENT INCOME
Income:
<S>                                      <C>            <C>             <C>
Interest .............................   $ 2,853,682    $ 23,135,883    $ 7,912,413
                                         -----------    ------------    -----------
Expenses (Note 2):
Management fees ......................       259,763       2,114,983        677,423
Distribution fees -- Advisor Class ...         6,189           4,160          2,868
Service fees -- Advisor Class ........         6,189           4,160          2,868
Trustees' fees and expenses ..........         2,529          17,193          6,485
                                         -----------    ------------    -----------
                                             274,670       2,140,496        689,644
                                         -----------    ------------    -----------
Net investment income ................     2,579,012      20,995,387      7,222,769
                                         -----------    ------------    -----------

REALIZED AND UNREALIZED
GAIN (LOSS) ON INVESTMENTS
(NOTE 3)
Net realized gain on investments .....       211,046       9,269,222      5,981,743
Change in net unrealized
  appreciation (depreciation)
  on investments .....................       (65,450)     (7,602,642)    (7,972,679)
                                         -----------    ------------    -----------
Net realized and unrealized gain
   (loss) on investments .............       145,596       1,666,580     (1,990,936)
                                         -----------    ------------    -----------
Net Increase in Net Assets
  Resulting from Operations ..........   $ 2,724,608    $ 22,661,967    $ 5,231,833
                                         ===========    ============    ===========
</TABLE>

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF OPERATIONS--This  statement breaks down how each
fund's  net  assets  changed  during  the  period  as a  result  of  the  fund's
operations.  It tells you how much money the fund made or lost after taking into
account income,  fees and expenses,  and investment gains or losses. It does not
include shareholder transactions and distributions.

Fund OPERATIONS include:

* income earned from investments

* management fees and other expenses

* gains or losses from selling investments (known as realized gains or losses)

* gains or losses on current fund holdings (known as unrealized appreciation or
  depreciation)

                                              See Notes to Financial Statements


20      1-800-345-2021


<TABLE>
<CAPTION>
Statements of Changes in Net Assets
- --------------------------------------------------------------------------------

YEARS ENDED MARCH 31, 1999 AND MARCH 31, 1998

                                         SHORT-TERM TREASURY           INTERMEDIATE-TERM TREASURY           LONG-TERM TREASURY

Increase (Decrease)
in Net Assets                           1999            1998             1999             1998             1999             1998

OPERATIONS
<S>                                <C>             <C>             <C>              <C>              <C>              <C>
Net investment income ..........   $  2,579,012    $  2,115,925    $  20,995,387    $  19,519,507    $   7,222,769    $   7,448,950
Net realized gain
  on investments ...............        211,046          65,744        9,269,222        9,644,597        5,981,743        4,166,419
Change in net unrealized
  appreciation (depreciation)
  on investments ...............        (65,450)        378,595       (7,602,642)       6,630,430       (7,972,679)      12,123,302
                                   ------------    ------------    -------------    -------------    -------------    -------------
Net increase in net assets
  resulting from operations ....      2,724,608       2,560,264       22,661,967       35,794,534        5,231,833       23,738,671
                                   ------------    ------------    -------------    -------------    -------------    -------------

DISTRIBUTIONS TO
SHAREHOLDERS
From net investment income:
  Investor Class ...............     (2,463,442)     (2,089,108)     (20,921,594)     (19,516,910)      (7,164,769)      (7,447,009)
  Advisor Class ................       (115,570)        (26,817)         (73,793)          (2,597)         (58,000)          (1,941)
From net realized gains on
  investment transactions:
  Investor Class ...............           --              --         (8,543,680)            --         (7,472,735)            --
  Advisor Class ................           --              --            (37,293)            --            (48,402)            --
In excess of net realized
  gains on investment
  transactions:
  Investor Class ...............           --              --               --               --           (788,886)            --
  Advisor Class ................           --              --               --               --            (35,078)            --
                                   ------------    ------------    -------------    -------------    -------------    -------------
Decrease in net assets
  from distributions ...........     (2,579,012)     (2,115,925)     (29,576,360)     (19,519,507)     (15,567,870)      (7,448,950)
                                   ------------    ------------    -------------    -------------    -------------    -------------

CAPITAL SHARE
TRANSACTIONS (NOTE 4)
Net increase (decrease) in
  net assets from capital
  share transactions ...........     22,404,706       6,036,113       73,537,251       29,929,571       46,876,040      (39,260,238)
                                   ------------    ------------    -------------    -------------    -------------    -------------
Net increase (decrease)
  in net assets ................     22,550,302       6,480,452       66,622,858       46,204,598       36,540,003      (22,970,517)

NET ASSETS
Beginning of year ..............     42,334,729      35,854,277      374,988,796      328,784,198      103,599,326      126,569,843
                                   ------------    ------------    -------------    -------------    -------------    -------------
End of year ....................   $ 64,885,031    $ 42,334,729    $ 441,611,654    $ 374,988,796    $ 140,139,329    $ 103,599,326
                                   ============    ============    =============    =============    =============    =============
</TABLE>

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF CHANGES IN NET ASSETS--These statements show how
each fund's net assets changed over the past two reporting  periods.  It details
how much a fund grew or shrank as a result of:

* operations--a summary of the Statement of Operations from the previous page
  for the most recent period

* distributions--income and gains distributed to shareholders

* share transactions--shareholders' purchases, reinvestments, and redemptions

Net  assets  at the  beginning  of  the  period  plus  the  sum  of  operations,
distributions  to  shareholders  and capital  share  transactions  result in net
assets at the end of the period.

See Notes to Financial Statements


                                                 www.americancentury.com      21


Notes to Financial Statements
- --------------------------------------------------------------------------------

MARCH 31, 1999

1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     Organization  -- American  Century  Government  Income Trust (the trust) is
registered under the Investment  Company Act of 1940 as an open-end  diversified
management   investment   company.   Short-Term   Treasury  Fund   (Short-Term),
Intermediate-Term Treasury Fund (Intermediate-Term), and Long-Term Treasury Fund
(Long-Term)  (the  funds)  are three of the  eight  funds  issued by the  trust.
Short-Term  seeks to earn and  distribute  the highest  level of current  income
exempt  from  state  income  taxes as is  consistent  with the  preservation  of
capital.  The fund  intends to pursue its  investment  objectives  by  investing
exclusively  in  securities  issued  or  guaranteed  by  the  U.S.   Government.
Intermediate-Term  seeks to earn and  distribute  the  highest  level of current
income  consistent  with the  conservation  of assets and the safety provided by
U.S. Treasury bills, notes, and bonds. The fund intends to pursue its investment
objectives by investing primarily in U.S. Treasury notes, which carry the direct
full faith and credit pledge of the U.S. government.  Long-Term seeks to provide
a consistent and high level of current income exempt from state taxes.  The fund
intends  to  pursue  its  investment  objectives  by  investing  exclusively  in
securities issued or guaranteed by the U.S.  Treasury.  The funds are authorized
to issue two classes of shares:  the Investor Class and the Advisor  Class.  The
two  classes  of  shares  differ  principally  in their  respective  shareholder
servicing and distribution  expenses and  arrangements.  All shares of the funds
represent  an equal pro rata  interest  in the assets of the class to which such
shares belong, and have identical voting, dividend, liquidation and other rights
and the same  terms and  conditions,  except  for class  specific  expenses  and
exclusive  rights to vote on matters  affecting  only  individual  classes.  The
following  significant  accounting  policies are in  accordance  with  generally
accepted  accounting  principles;  these  principles  may  require  the  use  of
estimates by fund management.

     Security  Valuations -- Securities are valued 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 as of the
trade date. 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 accretion of discounts and amortization of premiums.

     Repurchase  Agreements  -- The funds may enter into  repurchase  agreements
with  institutions  that  the  funds'  investment   manager,   American  Century
Investment Management,  Inc. (ACIM), has determined are creditworthy pursuant to
criteria adopted by the Board of Trustees. Each repurchase agreement is recorded
at cost.  The funds  require that the  collateral,  represented  by  securities,
received in a repurchase transaction be transferred to the custodian in a manner
sufficient  to enable  the funds to obtain  those  securities  in the event of a
default under the repurchase  agreement.  ACIM monitors,  on a daily basis,  the
securities  transferred to ensure the value,  including accrued interest, of the
securities  under each repurchase  agreement is equal to or greater than amounts
owed to the funds under each repurchase agreement.

     Joint  Trading  Account -- Pursuant  to an  Exemptive  Order  issued by the
Securities  and  Exchange  Commission,  the funds,  along with other  registered
investment  companies  having  management  agreements  with ACIM,  may  transfer
uninvested  cash  balances  into a joint  trading  account.  These  balances are
invested in one or more repurchase agreements that are collateralized by U.S.
Treasury or Agency obligations.

     Income  Tax  Status  -- It is the  funds'  policy  to  distribute  all  net
investment  income  and net  realized  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
income taxes.

     Distributions to Shareholders -- Distributions  from net investment  income
are declared  daily and  distributed  monthly.  Distributions  from net realized
gains are declared and paid annually.

     For the five month  period  ended March 31,  1999,  Long-Term  incurred net
capital losses of $623,702.  The fund has elected to treat such losses as having
been incurred in the following fiscal year.

     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  reflect the differing character
of  certain  income  items and net  realized  gains  and  losses  for  financial
statement  and tax purposes  and may result in  reclassification  among  certain
capital accounts.

     Additional Information -- Funds Distributor, Inc. (FDI) is the trust's
distributor. Certain officers of FDI are also officers of the trust.


22      1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
2. TRANSACTIONS WITH RELATED PARTIES

    The trust has entered into a Management  Agreement  with ACIM that  provides
the funds with  investment  advisory and  management  services in exchange for a
single,  unified management fee per class. Expenses excluded from this agreement
are brokerage,  taxes, portfolio insurance,  interest,  fees and expenses of the
Trustees  who  are  not  considered  "interested  persons"  as  defined  in  the
Investment  Company  Act of 1940  (including  counsel  fees)  and  extraordinary
expenses.  The fee is  calculated  daily and paid  monthly.  It  consists  of an
Investment  Category  Fee  based on the  average  net  assets  of the funds in a
specific fund's  investment  category and a Complex Fee based on the average net
assets of all the funds managed by ACIM. The rates for the  Investment  Category
Fee range from  0.1625% to 0.2800% and the rates for the  Complex Fee  (Investor
Class) range from 0.2900% to 0.3100%.  The Advisor Class is 0.2500% less at each
point  within the Complex  Fee range.  For the year ended  March 31,  1999,  the
effective  annual  Investor  Class  management  fee was  0.51%  for  Short-Term,
Intermediate-Term, and Long-Term.

    The Board of Trustees has adopted the Advisor Class Master  Distribution and
Shareholder  Services Plan (the plan),  pursuant to Rule 12b-1 of the Investment
Company Act of 1940.  The plan  provides  that the funds will pay ACIM an annual
distribution  fee equal to 0.25% and  service  fee equal to 0.25%.  The fees are
computed  daily and paid  monthly  based on the Advisor  Class's  average  daily
closing net assets  during the previous  month.  The  distribution  fee provides
compensation for distribution  expenses incurred by financial  intermediaries in
connection  with  distributing  shares of the Advisor Class  including,  but not
limited to, payments to brokers,  dealers, and financial  institutions that have
entered into sales  agreements with respect to shares of the funds.  The service
fee provides  compensation for shareholder and administrative  services rendered
by ACIM,  its  affiliates or independent  third party  providers.  Fees incurred
under the plan for the year ended March 31,  1999,  were  $12,378,  $8,320,  and
$5,736 for Short-Term, Intermediate-Term, and Long-Term, respectively.

    Certain  officers  and  trustees  of the  trust  are  also  officers  and/or
directors,  and,  as a  group,  controlling  stockholders  of  American  Century
Companies,  Inc., the parent of the trust's  investment  manager,  ACIM, and the
trust's transfer agent, American Century Services Corporation.

- --------------------------------------------------------------------------------
3. INVESTMENT TRANSACTIONS

  Investment transactions,  excluding short-term investments, for the year ended
March 31, 1999, were as follows:

                             SHORT-TERM      INTERMEDIATE-TERM     LONG-TERM
PURCHASES
U.S. Treasury &
   Agency Obligations       $90,914,719       $937,857,061      $173,023,264

PROCEEDS FROM SALES
U.S. Treasury &
   Agency Obligations       $70,121,172       $892,366,175      $134,289,368

  On March 31, 1999, the composition of unrealized  appreciation and depreciaton
of investment  securities based on the aggregate cost of investments for federal
income tax purposes was as follows:

                            SHORT-TERM      INTERMEDIATE-TERM     LONG-TERM

Appreciation                 $159,534           $518,278         $4,677,693
Depreciation                 (56,753)          (6,735,674)       (3,028,844)
                           --------------    ---------------   ---------------
Net                          $102,781         $(6,217,396)       $1,648,849
                           ==============    ===============   ===============
Federal Tax Cost            $64,886,167       $441,026,526      $137,187,382
                           ==============    ===============   ===============


                                                 www.americancentury.com      23


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
4. CAPITAL SHARE TRANSACTIONS

    Transactions  in shares of the funds  were as follows  (unlimited  number of
shares authorized):

<TABLE>
<CAPTION>
                                       SHORT-TERM                INTERMEDIATE-TERM                   LONG-TERM
                                        TREASURY                      TREASURY                        TREASURY
                                 SHARES         AMOUNT         SHARES          AMOUNT          SHARES          AMOUNT
INVESTOR
CLASS
Year ended
  March 31, 1999
<S>                           <C>            <C>             <C>            <C>              <C>           <C>
Sold ........................ 4,412,757      $43,591,614     29,173,347     $313,245,076     18,059,945    $197,964,116
Issued in reinvestment
  of distributions ..........  193,505       1,909,855       2,435,272       26,094,427      1,331,429      14,361,980
Redeemed .................... (2,502,210)   (24,728,630)    (25,416,559)    (271,906,811)   (15,570,167)   (167,958,607)
                              -----------   -------------   -------------   -------------   ------------   -------------
Net increase ................ 2,104,052      $20,772,839     6,192,060       $67,432,692     3,821,207      $44,367,489
                              ===========   =============   =============   =============   ============   =============

Year ended
  March 31, 1998
Sold ........................ 2,567,149      $25,097,075     14,443,950     $151,080,905     9,608,865     $ 98,249,389
Proceeds from shares issued
  in connection with
  acquisition (Note 5) ......     --             --          2,112,963       21,794,449           --            --
Issued in reinvestment
  of distributions ..........  164,358       1,606,171       1,613,842       16,808,219       663,519        6,690,790
Redeemed .................... (2,264,205)   (22,130,095)    (15,351,681)    (159,880,431)   (14,077,909)   (144,419,652)
                              -----------   -------------   -------------   -------------   ------------   -------------
Net increase (decrease) .....  467,302       $4,573,151      2,819,074       $29,803,142     (3,805,525)   $(39,479,473)
                              ===========   =============   =============   =============   ============   =============

ADVISOR CLASS
Year ended
  March 31, 1999
Sold ........................  242,695       $2,387,821       591,748        $6,304,918       288,248       $3,097,845
Issued in reinvestment
  of distributions ..........   11,505        113,552          9,556          101,937          11,707         126,039
Redeemed ....................  (88,171)       (869,506)       (27,956)        (302,296)       (64,830)       (715,333)
                              -----------   -------------   -------------   -------------   ------------   -------------
Net increase ................  166,029       $1,631,867       573,348        $6,104,559       235,125       $2,508,551
                              ===========   =============   =============   =============   ============   =============

Period ended
  March 31, 1998(1)
Sold ........................  225,866       $2,214,832        11,866         $123,904         20,452        $217,424
Issued in reinvestment
  of distributions ..........   2,637          25,863           239            2,525            171            1,811
Redeemed ....................  (79,470)       (777,733)          --              --              --              --
                              -----------   -------------   -------------   -------------   ------------   -------------
Net increase ................  149,033       $1,462,962        12,105         $126,429         20,623        $219,235
                              ===========   =============   =============   =============   ============   =============
</TABLE>

(1)  Period  from  October  6,  1997,  October 9, 1997,  and  January  12,  1998
     (commencement   of  sale)   through   March   31,   1998  for   Short-Term,
     Intermediate-Term, and Long-Term, respectively.


24      1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
5. REORGANIZATION PLAN

     On August 29, 1997, Intermediate-Term acquired all of the net assets of the
American Century - Benham  Intermediate-Term  Government Fund (Intermediate-Term
Government),  pursuant  to a plan of  reorganization  approved  by the  acquired
fund's shareholders on July 30, 1997.

     The acquisition was accomplished by a tax-free exchange of 2,112,963 shares
of  Intermediate-Term  for  2,245,781  shares of  Intermediate-Term  Government,
outstanding  on  August  29,  1997.  The net  assets  of  Intermediate-Term  and
Intermediate-Term   Government   immediately   before  the   acquisitions   were
$325,428,315  and  $21,794,449,  respectively.   Intermediate-Term  Government's
unrealized  depreciation of $59,574 was combined with that of Intermediate-Term.
Immediately after the acquisition,  the combined net assets of Intermediate-Term
(the  surviving fund for purposes of  maintaining  the financial  statements and
performance history in the post-reorganization fund) were $347,222,764.

     Intermediate-Term  acquired  capital loss  carryforwards  of  approximately
$119,591.  These acquired capital loss  carryforwards are subject to limitations
on their use under the Internal Revenue Code, as amended.

- --------------------------------------------------------------------------------
6. BANK LOANS

     Effective  December 18,  1998,  the funds,  along with certain  other funds
managed by ACIM,  entered  into an  unsecured  $570,000,000  bank line of credit
agreement  with  Chase  Manhattan  Bank.  Borrowings  under the  agreement  bear
interest at the Federal  Funds rate plus 0.40%.  The funds may borrow  money for
temporary or emergency purposes to fund shareholder  redemptions.  The funds did
not borrow from the line during the period  December 18, 1998 through  March 31,
1999.

- --------------------------------------------------------------------------------
7. FUND EVENTS

   The following name changes became effective March 1, 1999:

              ==================================================================
               NEW NAME                  FORMER NAME
              ==================================================================

   Fund:       Short-Term                American Century - Benham Short-Term
               Treasury Fund             Treasury Fund

   Fund:       Intermediate-Term         American Century - Benham
               Treasury Fund             Intermediate-Term  Treasury Fund

   Fund:       Long-Term                 American Century - Benham Long-Term
               Treasury Fund             Treasury Fund


                                                 www.americancentury.com      25


<TABLE>
<CAPTION>
Short-Term Treasury--Financial Highlights
- --------------------------------------------------------------------------------

FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31

                                                         Investor Class
                                        1999       1998       1997       1996       1995
PER-SHARE DATA
<S>                                    <C>        <C>         <C>        <C>        <C>
Net Asset Value, Beginning of Year ... $9.80      $9.68       $9.84      $9.73      $9.86
                                      --------   --------   --------   --------   --------
Income From Investment Operations
  Net Investment Income ..............  0.49       0.53       0.52       0.53       0.50
  Net Realized and Unrealized
  Gain (Loss) on Investment
  Transactions .......................  0.05       0.12      (0.07)      0.11      (0.13)
                                      --------   --------   --------   --------   --------
  Total From Investment Operations ...  0.54       0.65       0.45       0.64       0.37
                                      --------   --------   --------   --------   --------
Distributions
  From Net Investment Income ......... (0.49)     (0.53)     (0.52)     (0.53)     (0.50)
  From Net Realized Gains
  on Investment Transactions .........   --         --       (0.09)       --         --
                                      --------   --------   --------   --------   --------
  Total Distributions ................ (0.49)     (0.53)     (0.61)     (0.53)     (0.50)
                                      --------   --------   --------   --------   --------
Net Asset Value, End of Year .........  $9.85      $9.80      $9.68      $9.84      $9.73
                                      ========   ========   ========   ========   ========
  Total Return(1) ....................  5.60%      6.89%      4.62%      6.71%      3.85%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ................  0.51%      0.55%      0.61%      0.67%      0.67%
Ratio of Net Investment Income
to Average Net Assets ................  4.92%      5.45%      5.26%      5.39%      5.22%
Portfolio Turnover Rate ..............  138%       140%       234%       224%       141%
Net Assets, End of Year
(in thousands) ....................... $61,783    $40,874    $35,854    $35,648    $56,090
</TABLE>

(1)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions, if any.

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL HIGHLIGHTS--These  statements itemize current period
activity and  statistics  and provide  comparison  data for the last five fiscal
years (or less, if the class is not five years old).

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

* total return--the overall percentage return of the fund, assuming reinvestment
  of all distributions

* expense ratio--operating expenses as a percentage of average net assets

* net income ratio--net investment income as a percentage of average net assets

* portfolio turnover--the percentage of the portfolio that was replaced during
  the period

                                              See Notes to Financial Statements


26      1-800-345-2021


Short-Term Treasury--Financial Highlights
- --------------------------------------------------------------------------------

FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31 (EXCEPT AS NOTED)

                                                    Advisor Class
                                                 1999       1998(1)
PER-SHARE DATA
Net Asset Value, Beginning of Period ..........  $9.80       $9.80
                                               --------    ---------
Income From Investment Operations
  Net Investment Income .......................  0.46        0.25
  Net Realized and Unrealized
  Gain on Investment Transactions .............  0.05         --
                                               --------    ---------
  Total From Investment Operations ............  0.51        0.25
                                               --------    ---------
Distributions
  From Net Investment Income .................. (0.46)      (0.25)
                                               --------    ---------
Net Asset Value, End of Period ................  $9.85       $9.80
                                               ========    =========
  Total Return(2) .............................  5.34%       2.51%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .........................  0.76%     0.78%(3)
Ratio of Net Investment Income
to Average Net Assets .........................  4.67%     5.20%(3)
Portfolio Turnover Rate .......................  138%        140%
Net Assets, End of Period
(in thousands) ................................ $3,102      $1,460

(1)  October 6, 1997 (commencement of sale) through March 31, 1998.
(2)  Total return assumes reinvestment of dividends and capital gains
     distributions, if any. Total returns for periods less than one
     year are not annualized.
(3)  Annualized.

See Notes to Financial Statements


                                                 www.americancentury.com      27


<TABLE>
<CAPTION>
Intermediate-Term Treasury--Financial Highlights
- --------------------------------------------------------------------------------

FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31

                                                          Investor Class
                                         1999       1998       1997       1996       1995
PER-SHARE DATA
<S>                                     <C>        <C>        <C>         <C>      <C>
Net Asset Value, Beginning of Year .... $10.56     $10.06     $10.24      $9.99    $10.18
                                       --------   --------   --------   --------   --------
Income From Investment Operations
  Net Investment Income ...............  0.54       0.59       0.58       0.58       0.53
  Net Realized and Unrealized
  Gain (Loss) on Investment
  Transactions ........................  0.10       0.50      (0.18)      0.25      (0.19)
                                       --------   --------   --------   --------   --------
  Total From Investment Operations ....  0.64       1.09       0.40       0.83       0.34
                                       --------   --------   --------   --------   --------
Distributions
  From Net Investment Income .......... (0.54)     (0.59)     (0.58)     (0.58)     (0.53)
  From Net Realized Gains
  on Investment Transactions .......... (0.21)       --         --         --         --
                                       --------   --------   --------   --------   --------
  Total Distributions ................. (0.75)     (0.59)     (0.58)     (0.58)     (0.53)
                                       --------   --------   --------   --------   --------
Net Asset Value, End of Year .......... $10.45     $10.56     $10.06     $10.24      $9.99
                                       ========   ========   ========   ========   ========
  Total Return(1) .....................  6.09%     11.04%      4.05%      8.42%      3.54%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .................  0.51%      0.51%      0.51%      0.53%      0.53%
Ratio of Net Investment Income
to Average Net Assets .................  5.01%      5.63%      5.72%      5.65%      5.35%
Portfolio Turnover Rate ...............  221%      194%(2)     110%       168%        92%
Net Assets, End of Year
(in thousands) ........................$435,494   $374,861   $328,784   $311,020   $305,353
</TABLE>

(1)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions, if any.
(2)  Purchases, sales and market value amounts for Intermediate-Term  Government
     prior to the merger were excluded from the portfolio turnover calculation.
     See Note 5 in notes to financial statements.

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL HIGHLIGHTS--These  statements itemize current period
activity and  statistics  and provide  comparison  data for the last five fiscal
years (or less, if the class is not five years old).

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

* total return--the overall percentage return of the fund, assuming reinvestment
  of all distributions

* expense ratio--operating expenses as a percentage of average net assets

* net income ratio--net investment income as a percentage of average net assets

* portfolio turnover--the percentage of the portfolio that was replaced during
  the period

                                              See Notes to Financial Statements


28      1-800-345-2021


Intermediate-Term Treasury--Financial Highlights
- --------------------------------------------------------------------------------

FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31 (EXCEPT AS NOTED)

                                                    Advisor Class
                                                 1999       1998(1)
PER-SHARE DATA
Net Asset Value, Beginning of Period .........  $10.56      $10.42
                                               --------    --------
Income From Investment Operations
  Net Investment Income ......................   0.51        0.26
  Net Realized and Unrealized Gain
  on Investment Transactions .................   0.10        0.14
                                               --------    --------
  Total From Investment Operations ...........   0.61        0.40
                                               --------    --------
Distributions
  From Net Investment Income .................  (0.51)      (0.26)
  From Net Realized Gains on
  Investment Transactions ....................  (0.21)        --
                                               --------    --------
  Total Distributions ........................  (0.72)      (0.26)
                                               --------    --------
Net Asset Value, End of Period ...............  $10.45      $10.56
                                               ========    ========
  Total Return(2) ............................   5.83%       3.90%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ........................   0.76%     0.77%(3)
Ratio of Net Investment Income
to Average Net Assets ........................   4.76%     5.28%(3)
Portfolio Turnover Rate ......................   221%       194%(4)
Net Assets, End of Period
(in thousands) ...............................  $6,117       $128

(1)  October 9, 1997 (commencement of sale) through March 31, 1998.
(2)  Total return assumes reinvestment of dividends and capital gains
     distributions, if any. Total returns for periods less than one year are
     not annualized.
(3)  Annualized.
(4)  Purchases, sales and market value amounts for Intermediate-Term  Government
     prior to the merger were excluded from the portfolio turnover calculation.
     See Note 5 in notes to financial statements.

See Notes to Financial Statements


                                                 www.americancentury.com      29


<TABLE>
<CAPTION>
Long-Term Treasury--Financial Highlights
- --------------------------------------------------------------------------------

FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31

                                                          Investor Class
                                         1999       1998       1997       1996       1995
PER-SHARE DATA
<S>                                     <C>        <C>         <C>        <C>        <C>
Net Asset Value, Beginning of Year .... $10.58     $9.32       $9.67      $9.05      $9.38
                                       --------   --------   --------   --------   --------
Income From Investment Operations
  Net Investment Income ...............  0.58       0.61       0.60       0.60       0.60
  Net Realized and Unrealized
  Gain (Loss) on Investment
  Transactions ........................  0.11       1.26      (0.35)      0.62      (0.33)
                                       --------   --------   --------   --------   --------
  Total From Investment Operations ....  0.69       1.87       0.25       1.22       0.27
                                       --------   --------   --------   --------   --------
Distributions
  From Net Investment Income .......... (0.58)     (0.61)     (0.60)     (0.60)     (0.60)
  From Net Realized Gains
  on Investment Transactions .......... (0.52)       --         --         --         --
  In Excess of Net Realized Gains ..... (0.05)       --         --         --         --
                                       --------   --------   --------   --------   --------
  Total Distributions ................. (1.15)     (0.61)     (0.60)     (0.60)     (0.60)
                                       --------   --------   --------   --------   --------
Net Asset Value, End of Year .......... $10.12     $10.58      $9.32      $9.67      $9.05
                                       ========   ========   ========   ========   ========
  Total Return(1) .....................  6.33%     20.48%      2.65%     13.46%      3.25%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .................  0.51%      0.54%      0.60%      0.67%      0.67%
Ratio of Net Investment Income
to Average Net Assets .................  5.37%      6.00%      6.28%      5.93%      6.84%
Portfolio Turnover Rate ...............  105%        57%        40%       112%       147%
Net Assets, End of Year
(in thousands) ........................$137,552   $103,381   $126,570   $110,741    $34,906
</TABLE>

(1)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions, if any.

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL HIGHLIGHTS--These  statements itemize current period
activity and  statistics  and provide  comparison  data for the last five fiscal
years (or less, if the class is not five years old).

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

* total return--the overall percentage return of the fund, assuming reinvestment
  of all distributions

* expense ratio--operating expenses as a percentage of average net assets

* net income ratio--net investment income as a percentage of average net assets

* portfolio turnover--the percentage of the portfolio that was replaced during
  the period

                                              See Notes to Financial Statements


30      1-800-345-2021


Long-Term Treasury--Financial Highlights
- --------------------------------------------------------------------------------

FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31 (EXCEPT AS NOTED)

                                                   Advisor Class
                                                 1999       1998(1)
PER-SHARE DATA
Net Asset Value, Beginning of Period .......... $10.58      $10.85
                                               --------    --------
Income From Investment Operations
  Net Investment Income .......................  0.56        0.12
  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions ...........  0.11       (0.27)
                                               --------    --------
  Total From Investment Operations ............  0.67       (0.15)
                                               --------    --------
Distributions
  From Net Investment Income .................. (0.56)      (0.12)
  From Net Realized Gains on
  Investment Transactions ..................... (0.34)        --
  In Excess of Net Realized Gains ............. (0.23)        --
                                               --------    --------
  Total Distributions ......................... (1.13)      (0.12)
                                               --------    --------
Net Asset Value, End of Period ................ $10.12      $10.58
                                               ========    ========
  Total Return(2) .............................  6.07%      (1.34)%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .........................  0.76%     0.77%(3)
Ratio of Net Investment Income
to Average Net Assets .........................  5.12%     5.42%(3)
Portfolio Turnover Rate .......................  105%         57%
Net Assets, End of Period
(in thousands) ................................ $2,587       $218

(1)  January 12, 1998 (commencement of sale) through March 31, 1998.
(2)  Total return assumes reinvestment of dividends and capital gains
     distributions, if any. Total returns for periods less than one
     year are not annualized.
(3)  Annualized.

See Notes to Financial Statements


                                                 www.americancentury.com      31


Report of Independent Accountants
- --------------------------------------------------------------------------------

To the Trustees of the American Century Government Income Trust
and Shareholders of the Short-Term Treasury Fund, Intermediate-Term Treasury
Fund and Long-Term Treasury Fund:

In our opinion, the accompanying statements of assets and liabilities, including
the schedules of  investments,  and the related  statements of operations and of
changes  in net assets  and the  financial  highlights  present  fairly,  in all
material  respects,  the financial  position of the  Short-Term  Treasury  Fund,
Intermediate-Term  Treasury  Fund and  Long-Term  Treasury  Fund  (formerly  the
American  Century - Benham  Short-Term  Treasury  Fund,  the American  Century -
Benham  Intermediate-Term  Treasury  Fund  and the  American  Century  -  Benham
Long-Term Treasury Fund, respectively) (three of the eight funds in the American
Century  Government Income Trust hereafter  referred to as the "Funds") at March
31, 1999, the results of each of their operations,  the changes in each of their
net assets and the financial  highlights for each of the two years in the period
then ended, in conformity with generally  accepted  accounting  principles.  The
financial  highlights  for each of the three years in the period ended March 31,
1997 were audited by other auditors,  whose report dated May 2, 1997,  expressed
an  unqualified  opinion on those  statements.  These  financial  statements and
financial highlights  (hereafter referred to as "financial  statements") are the
responsibility  of the Funds'  management;  our  responsibility is to express an
opinion on these  financial  statements  based on our audits.  We conducted  our
audits of these  financial  statements in  accordance  with  generally  accepted
auditing  standards  which  require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the  amounts  and  disclosures  in  the  financial  statements,   assessing  the
accounting  principles  used and significant  estimates made by management,  and
evaluating the overall  financial  statement  presentation.  We believe that our
audits,  which  included  confirmation  of  securities  at  March  31,  1999  by
correspondence  with the custodian and brokers,  provide a reasonable  basis for
the opinion expressed above.

                                                      PricewaterhouseCoopers LLP


Kansas City, Missouri
May 7, 1999


32      1-800-345-2021


Share Class and Retirement Account Information
- --------------------------------------------------------------------------------

SHARE CLASSES

     Two classes of shares are authorized for sale by the funds: Investor Class
and Advisor Class.

      Investor Class  shareholders  do not pay any commissions or other fees for
purchase  of fund shares  directly  from  American  Century.  Investors  who buy
Investor  Class  shares  through  a  broker-dealer  may be  required  to pay the
broker-dealer a transaction fee.

      Advisor  Class shares are sold through  banks,  broker-dealers,  insurance
companies  and financial  advisors.  Advisor Class shares are subject to a 0.50%
Rule 12b-1  service and  distribution  fee. Half of that fee is available to pay
for recordkeeping and administrative  services, and half is available to pay for
distribution  services provided by the financial  intermediary through which the
Advisor Class shares are purchased. The total expense ratio of the Advisor Class
is 0.25% higher than the total expense ratio of the Investor Class.

     Both  classes  of shares  represent  a pro rata  interest  in the funds and
generally have the same rights and preferences.

RETIREMENT ACCOUNT INFORMATION

     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 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 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 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.


                                                 www.americancentury.com      33


Background Information
- --------------------------------------------------------------------------------

INVESTMENT PHILOSOPHY AND POLICIES

     American  Century offers 38 fixed-income  funds,  ranging from money market
portfolios  to long-term  bond funds and including  both taxable and  tax-exempt
funds. Each fund is managed to provide a "pure play" on a specific sector of the
fixed-income market. To ensure adherence to this principle,  the basic structure
of each fund's  portfolio  is tied to a specific  market  index.  Fund  managers
attempt  to add  value by making  modest  portfolio  adjustments  based on their
analysis of  prevailing  market  conditions.  Investment  decisions  are made by
management teams, which meet regularly to discuss market analysis and investment
strategies.

     In addition to these principles, each fund has its own investment policies:

     Short-Term   Treasury  seeks  current  income  by  investing  primarily  in
securities  issued by the U.S.  Treasury.  The fund may also invest up to 35% of
its assets in securities issued by U.S. government agencies.  The fund typically
maintains an average maturity of 1-3 years.

     Intermediate-Term  Treasury seeks current income by investing  primarily in
securities  issued by the U.S.  Treasury.  The fund may also invest up to 35% of
its assets in securities issued by U.S. government agencies.  The fund typically
maintains an average maturity of 3-10 years.

     Long-Term   Treasury  seeks  current  income  by  investing   primarily  in
securities  issued by the U.S.  Treasury.  The fund may also invest up to 35% of
its assets in securities issued by U.S. government agencies.  The fund typically
maintains an average maturity of 20-30 years.

     Fund shares are not guaranteed by the U.S. government.

COMPARATIVE INDICES

     The  indices  listed  below  are used in the  report  for fund  performance
comparisons. They are not investment products available for purchase.

     The Salomon Brothers 1- to 3-Year  Treasury/Agency  Index and the Lehman 1-
to  3-Year  Government  Securities  Index  are  indices  of  U.S.  Treasury  and
government agency securities with remaining maturities between 1 and 3 years.

     The  Salomon  Brothers  3- to  10-Year  Treasury  Index is an index of U.S.
Treasury securities with remaining maturities between 3 and 10 years.

     The Salomon Brothers  Long-Term  Treasury/Agency  Index is an index of U.S.
Treasury and agency securities with remaining maturities greater than 10 years.

LIPPER RANKINGS

     Lipper Inc. is an independent mutual fund ranking service that groups funds
according to their  investment  objective.  Rankings are based on average annual
returns for each fund in a given  category for the periods  indicated.  Rankings
are not included for periods less than one year.

     The Lipper categories for the U.S. Treasury funds are:

     Short U.S.  Treasury  Funds  (Short-Term  Treasury)  --funds that invest at
least  65% of assets in U.S.  Treasury  bills,  notes,  and bonds  with  average
maturities of less than three years.

     Intermediate U.S. Treasury Funds  (Intermediate-Term  Treasury)--funds that
invest at least 65% of assets in U.S.  Treasury  bills,  notes,  and bonds  with
average maturities of 5-10 years.

     General U.S.  Treasury  Funds  (Long-Term  Treasury)--funds  that invest at
least 65% of assets in U.S. Treasury bills, notes, and bonds.

[left margin]

INVESTMENT TEAM LEADERS
  PORTFOLIO MANAGERS
     BOB GAHAGAN
     NEWLIN RANKIN
     DAVE SCHROEDER


34      1-800-345-2021


Glossary
- --------------------------------------------------------------------------------

RETURNS

* 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.

* 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 26-31.

YIELDS

* 30-Day SEC Yield  represents net  investment  income earned by the fund over a
30-day period,  expressed as an annual percentage rate based on the fund's share
price at the end of the 30-day  period.  The SEC yield  should be regarded as an
estimate  of the  fund's  rate of  investment  income,  and it may not equal the
fund's  actual  income  distribution  rate,  the income paid to a  shareholder's
account, or the income reported in the fund's financial statements.

PORTFOLIO STATISTICS

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

*  Weighted  Average  Maturity  (WAM)  -- a  measure  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.  The
longer the WAM, the more interest rate  exposure and  sensitivity  the portfolio
has.

* Average  Duration  -- another  measure of the  sensitivity  of a  fixed-income
portfolio to interest rate changes.  Duration is a time-weighted  average of the
interest  and  principal  payments  of the  securities  in a  portfolio.  As the
duration  of a portfolio  increases,  so does the impact of a change in interest
rates on the value of the portfolio.

* Expense Ratio -- the operating expenses of the fund, expressed as a percentage
of average net assets.  Shareholders pay an annual fee to the investment manager
for  investment  advisory  and  management  services.  The expenses and fees are
deducted from fund income, not from each shareholder account. (See Note 2 in the
Notes to Financial Statements.)

INVESTMENT TERMS

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

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

* 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.

SECURITY TYPES

* Repurchase  Agreements  (Repos)  --short-term  debt agreements in which a fund
buys a security  at one price and  simultaneously  agrees to sell it back to the
seller at a slightly  higher  price on a specified  date  (usually  within seven
days). The fund does not actually own the security; instead, the security serves
as collateral for the agreement.

* U.S. Government Agency Securities -- debt securities issued by U.S. government
agencies  (such as the Federal Home Loan Bank and the Federal Farm Credit Bank).
Some  agency  securities  are  backed by the full  faith and  credit of the U.S.
government,  while others are guaranteed only by the issuing agency.  Government
agency securities include discount notes (maturing in one year or


                                                 www.americancentury.com      35


Glossary
- --------------------------------------------------------------------------------

less) and medium-term notes, debentures,  and bonds (maturing in three months to
50 years).

* U.S.  Treasury  Inflation-Indexed  Securities -- debt securities issued by the
U.S.  Treasury  and backed by the direct  "full faith and credit"  pledge of the
U.S. government.  Inflation-indexed  bonds have lower interest rates than normal
Treasury   bonds  with   similar   maturities.   But  unlike   ordinary   bonds,
inflation-indexed  bonds'  principal  value is adjusted  regularly for inflation
based on the consumer price index. As a result,  the amount of interest paid out
changes with the principal adjustments.

* U.S.  Treasury  Securities -- debt securities  issued by the U.S. Treasury and
backed by the direct  "full  faith and  credit"  pledge of the U.S.  government.
Treasury  securities  include  bills  (maturing  in one  year  or  less),  notes
(maturing in two to 10 years), and bonds (maturing in more than 10 years).

* 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.  The funds
typically only invest in zeros issued by the U.S. Treasury (such as STRIPS).

FUND CLASSIFICATIONS

INVESTMENT OBJECTIVE

The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

* Capital  Preservation--Offers  taxable and  tax-free  money  market  funds for
relative stability of principal and liquidity.

* Income--Offers  funds that can provide current income and competitive  yields,
as well as a strong and stable  foundation and generally lower volatility levels
than stock funds.

*  Growth  &  Income--Offers  funds  that  emphasize  both  growth  and  income,
diversification,  varying  capitalization sizes, and different investment styles
and strategies.

*  Growth--Offers  funds  with a focus on  capital  appreciation  and  long-term
growth,  generally providing high return potential with corresponding high price
fluctuation risk.

RISK

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that the fund's category may change over time. Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

* Conservative--these funds generally provide lower return potential with either
low or minimal price fluctuation risk.

* Moderate--  these funds  generally  provide  moderate  return  potential  with
moderate price fluctuation risk.

*  Aggressive--  these  funds  generally  provide  high  return  potential  with
corresponding high price fluctuation risk.


36      1-800-345-2021


[inside back cover]

===============================================================================
INVESTMENT OBJECTIVE - CAPITAL PRESERVATION
===============================================================================

                  RISK LEVEL - CONSERVATIVE

TAXABLE MONEY MARKETS           TAX-FREE MONEY MARKETS

Premium  Capital Reserve        FL Municipal Money Market
Prime Money Market              CA Municipal Money Market
Premium Government Reserve      CA Tax-Free Money Market
Government Agency               Tax-Free Money Market
   Money Market
Capital Preservation

===============================================================================
INVESTMENT OBJECTIVE - INCOME
===============================================================================

                   RISK LEVEL - AGGRESSIVE

TAXABLE BONDS                   TAX-FREE BONDS

Target 2025*                    CA High-Yield Municipal
Target 2020*                    High-Yield Municipal
Target 2015*
Target 2010*
High-Yield
International Bond

                    RISK LEVEL - MODERATE

TAXABLE BONDS                   TAX-FREE BONDS

Long-Term Treasury              CA Long-Term Tax-Free
Target 2005*                    Long-Term Tax-Free
Bond                            CA Insured Tax-Free
Premium Bond

                   RISK LEVEL - CONSERVATIVE

TAXABLE BONDS                   TAX-FREE BONDS

Intermediate-Term Bond          CA Intermediate-Term Tax-Free
Intermediate-Term Treasury      AZ Intermediate-Term Municipal
GNMA                            FL Intermediate-Term Municipal
Inflation-Adjusted Treasury     Intermediate-Term  Tax-Free
Limited-Term Bond               CA Limited-Term  Tax-Free
Target 2000*                    Limited-Term Tax-Free
Short-Term Government
Short-Term Treasury

===============================================================================
INVESTMENT OBJECTIVE - GROWTH AND INCOME
===============================================================================

                     RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY

Small Cap Quantitative
Small Cap Value

                      RISK LEVEL - MODERATE

ASSET ALLOCATION/BALANCED       DOMESTIC EQUITY        SPECIALTY

Strategic Allocation --         Equity Growth          Utilities
   Aggressive                   Equity Index           Real Estate
Balanced                        Tax-Managed Value
Strategic Allocation --         Income & Growth
   Moderate                     Value
Strategic Allocation --         Equity Income
   Conservative

===============================================================================
INVESTMENT OBJECTIVE - GROWTH
===============================================================================

                      RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY                 SPECIALTY              INTERNATIONAL

New Opportunities               Global Gold            Emerging Markets
Giftrust(reg.tm)                                       International Discovery
Vista                                                  International Growth
Heritage                                               Global Growth
Growth
Ultra
Select

                       RISK LEVEL - MODERATE

SPECIALTY

Global Natural Resources


The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that a fund's  category may change over time.  Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

For a definition of fund categories, see the Glossary.

*  While listed within the Income investment objective,  the Target funds do not
   pay current dividend income.  Income dividends are distributed once a year in
   December. The Target funds are listed in all three risk categories due to the
   dramatic  price  volatility  investors may  experience  during certain market
   conditions.  If held  to  their  target  dates,  however,  they  can  offer a
   conservative, dependable way to invest for a specific time horizon.

Please call for a prospectus  or profile on any  American  Century  fund.  These
documents contain important information including charges and expenses,  and you
should read them carefully before you invest or send money.


[back cover]

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

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

WWW.AMERICANCENTURY.COM

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX: 816-340-7962

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

BUSINESS, NOT-FOR-PROFIT, EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-3533

AMERICAN CENTURY GOVERNMENT INCOME TRUST

INVESTMENT MANAGER
AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.
KANSAS CITY, MISSOURI

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 Investments                                      BULK RATE
P.O. Box 419200                                               U.S. POSTAGE PAID
Kansas City, MO 64141-6200                                    AMERICAN CENTURY
www.americancentury.com                                           COMPANIES

9905                                                    Funds Distributor, Inc.
SH-BKT-16269                      (c)1999 American Century Services Corporation
<PAGE>
[front cover]
                                                                 MARCH 31, 1999

ANNUAL REPORT
- -----------------
AMERICAN CENTURY

[graphic of stairs]

AMERICAN CENTURY
- --------------------
CAPITAL PRESERVATION
GOVERNMENT AGENCY

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


[inside front cover]

AMERICAN CENTURY KEEPS WITH TRADITION
- --------------------------------------------------------------------------------

FOLLOWING BENHAM'S FOOTSTEPS

On March 1, we made it easier for you to do business with us. We simplified  our
organizational  structure by  eliminating  the  venerable  Benham and  Twentieth
Century names, and putting all our funds under American Century. The name change
will not affect your funds' investment  management--the proven Benham investment
philosophy, experienced portfolio management teams, and legacy of innovation and
high-quality performance remain.

CONSISTENT,  SOLID  PERFORMANCE--We'll  continue  to  adhere  to the  investment
practices  that have  helped  our  fixed-income  funds  perform so well over the
years. In 1998,  two-thirds of American Century bond funds beat their peer group
average, according to Lipper, Inc.

CONSISTENT  INVESTMENT  PHILOSOPHY--American  Century  fixed-income  funds  will
continue to offer a "pure play" on their sector of the market, as they did under
Benham.

CONTINUITY  OF THE  MANAGEMENT  TEAM--The  investment  process  is not all  that
remains  the same;  we've  retained  our core team of  experienced  fixed-income
portfolio managers.

    *  Experience--The  more than 35 fixed-income  investment  professionals  at
       American  Century have an average of nine years of investment  management
       experience.

    *  Bigger and better--Since  American Century was formed,  we've doubled the
       size  of the  original  Benham  management  team  in our  Mountain  View,
       California office.

TRADITION OF INNOVATION--Like  Benham before it, American Century is a leader in
fixed-income  fund  innovation.  For example,  we introduced a total of four new
fixed-income  funds  in the  last  three  years,  including  the  first  no-load
inflation-adjusted bond fund.

We continue to run our fixed-income operation from our offices in Mountain View,
California, which is also home to our walk-in Investor Center.

We look forward to continuing to meet your fixed-income  investment needs in the
Benham tradition.

WHAT'S NEW . . .

     We now classify our funds in easy-to-remember categories based on objective
and risk. The four  objective  categories  are:  CAPITAL  PRESERVATION,  INCOME,
GROWTH AND INCOME,  and GROWTH.  The three risk  categories  are:  CONSERVATIVE,
MODERATE,  and AGGRESSIVE.  This new  classification  system makes it easier for
investors to identify which funds are right for them.

     Turn to the  inside  back  cover of this  report to see a list of the funds
classified by objective and risk. For  definitions of the fund  categories,  see
the Glossary.

Past performance is no guarantee of future results.

[left margin]

CAPITAL PRESERVATION
(CPFXX)
- --------------------------------------

GOVERNMENT AGENCY
(BGAXX)
- --------------------------------------


Our Message to You
- --------------------------------------------------------------------------------
/photo of James E. Stowers III and James E. Stowers, Jr./
James E. Stowers III, seated, with James E. Stowers, Jr.

     The U.S.  Treasury and government  agency markets  experienced a remarkable
reversal during the year ended March 31, 1999. When we last addressed you in the
semiannual  report for the Capital  Preservation  and  Government  Agency funds,
money market yields had just plunged as investors  rushed to the relative safety
and  liquidity  of  short-term  securities.  Investors  were  spooked  by global
economic and financial  turmoil,  which also motivated the Federal  Reserve (the
U.S.  central  bank) to cut  short-term  interest  rates to bolster a  seemingly
vulnerable U.S. economy and help stabilize markets worldwide.

     The Fed's actions  helped turn things  around.  By January  1999,  overseas
economies were  stabilizing,  the U.S.  economy was posting  strong growth,  and
investor  confidence had rebounded.  As a result,  investors  moved out of money
market  securities in favor of stocks and  higher-yielding  bonds.  Money market
yields bounced back to higher levels,  though they remained  significantly lower
than they were a year earlier.

     There are some exciting changes going on at American Century.  In March, we
consolidated all our funds under the American Century name.  Though we are proud
of the venerable Twentieth Century and Benham names, we believe the change makes
it simpler for you to identify your funds.

     We also  reclassified  all 71 of our funds,  based on investment  goals and
risk levels,  so you can more easily  choose the funds that are right for you. A
complete list of American Century funds,  arranged by their new classifications,
is on the inside back cover of this report.

     In addition,  we've made some  enhancements to our Web site.  Among the new
features are daily fund information, including return and price data, market and
national  news,  and a Forms Center with access to the most  requested  investor
forms and  applications.  You can also sign up to receive fund  prospectuses and
shareholder reports electronically.

     Finally,  our latest Year 2000 Readiness  Disclosure.  Our critical systems
have been  renovated,  tested,  and returned to production.  We continue to test
these systems,  as well as participate in industry-wide  tests with our business
partners.

     As always, we appreciate your continued confidence in American Century.

Sincerely,

/s/James E. Stowers, Jr.                 /s/James E. Stowers III
James E. Stowers, Jr.                    James E. Stowers III
Chairman of the Board and Founder        Chief Executive Officer

[right margin]

                 Table of Contents
   Report Highlights ......................................................    2
   Frequently Asked
     Questions ............................................................    3
CAPITAL PRESERVATION
   Performance Information ................................................    4
   Management Q&A .........................................................    5
   Portfolio Composition by
      Security Type .......................................................    5
   Schedule of Investments ................................................    7
GOVERNMENT AGENCY
   Performance Information ................................................    8
   Management Q&A .........................................................    9
   Portfolio Composition by
      Security Type .......................................................    9
   Portfolio Composition by
      Maturity ............................................................   10
   Schedule of Investments ................................................   11
FINANCIAL STATEMENTS
   Statements of Assets and
      Liabilities .........................................................   13
   Statements of Operations ...............................................   14
   Statements of Changes
      in Net Assets .......................................................   15
   Notes to Financial
      Statements ..........................................................   16
   Financial Highlights ...................................................   18
   Report of Independent
      Accountants .........................................................   20
OTHER INFORMATION
   Retirement Account
      Information .........................................................   21
   Background Information
      Investment Philosophy
        and Policies ......................................................   22
      Comparative Indices .................................................   22
      Lipper Rankings .....................................................   22
      Investment Team
        Leaders ...........................................................   22
   Glossary ...............................................................   23


                                                  www.americancentury.com      1


Report Highlights
- --------------------------------------------------------------------------------

MARKET PERSPECTIVE

*   Money  market  yields  fell  during the year ended  March 31,  1999,  as the
    Federal Reserve cut short-term interest rates.

*   The Fed  lowered  rates three times in late 1998,  adding  stability  to the
    financial markets during a period of global economic turmoil.

*   Money  market  yields rose  modestly  in early 1999 as  economic  conditions
    improved.

*   We expect  short-term  interest rates to be relatively  stable in the coming
    months,  with the  three-month  Treasury  bill yield  remaining  in a narrow
    range.

CAPITAL PRESERVATION

*   The fund's  one-year  return as of March 31 beat the  return of the  average
    Treasury money market fund by a wide margin.

*   With interest  rates falling,  we maintained a longer  average  maturity for
    much of the period to lock in higher rates.

*   We  continued  to invest  nearly a third of the  portfolio  in dollar  rolls
    (short-term  agreements to buy and sell back Treasury securities) because of
    their attractive yields.

*   We plan to maintain the fund's current neutral average maturity, but we will
    seek out  opportunities to extend the maturity when yields are at the top of
    their recent range.

GOVERNMENT AGENCY

*   The fund's  one-year  return as of March 31 beat the  return of the  average
    government money market fund by a wide margin.

*   With interest  rates falling,  we maintained a longer  average  maturity for
    much of the period to lock in higher rates.

*   We continued to focus on agency  securities  issued by the Federal Home Loan
    Bank, which had higher yields because they were in greater supply.

*   We plan to maintain the fund's current neutral average maturity, but we will
    seek out  opportunities to extend the maturity when yields are at the top of
    their recent range.

[left margin]

           CAPITAL PRESERVATION
                  (CPFXX)
TOTAL RETURNS:               AS OF 3/31/99
    6 Months                        2.18%*
    1 Year                           4.72%
7-DAY CURRENT YIELD:                 4.17%
INCEPTION DATE:                   10/13/72
NET ASSETS:                   $3.3 billion

             GOVERNMENT AGENCY
                  (BGAXX)
TOTAL RETURNS:               AS OF 3/31/99
    6 Months                        2.30%*
    1 Year                           4.91%
7-DAY CURRENT YIELD:                 4.37%
INCEPTION DATE:                    12/5/89
NET ASSETS:                 $527.8 million

* Not annualized.

See Total Returns on pages 4 and 8.
Investment terms are defined in the Glossary on pages 23-24.


2      1-800-345-2021


Money Market Funds--Frequently Asked Questions
- --------------------------------------------------------------------------------

CAN I MAKE DIRECT DEPOSITS INTO MY MONEY MARKET FUND ACCOUNT?

     Yes. You can arrange for direct deposit of your paycheck,  Social  Security
check,  Treasury Direct interest payment,  military allotment,  or payments from
other  government  agencies.  Give us a call, and we will send you the necessary
information to set it up.

WHAT IS THE HOLDING PERIOD ON NEW DEPOSITS INTO MY ACCOUNT?

     Generally,  there is an  eight-business-day  holding  period for  deposited
funds  (initial  investments  in a new account  are held for 15 calendar  days).
There is a  one-business-day  holding  period for U.S.  Treasury  checks,  money
orders, and travelers' checks.

IS THERE A LIMIT ON THE NUMBER OF CHECKS I CAN WRITE ON MY MONEY MARKET ACCOUNT?

     No. You can write as many checks as you like at no charge, as long as each
check is for $100 or more.

IS THERE AN EASY WAY TO MOVE  MONEY  FROM MY MONEY  MARKET  FUND INTO A STOCK OR
BOND FUND?

     Yes.  Moving money  between  funds is called an  exchange,  and there is no
limit  on the  number  of  exchanges  you can make  out of a money  market  fund
account.  However,  there is a limit of six  exchanges  per calendar year out of
stock and bond fund accounts.

     Exchanges can be made by:

*    visiting our Web site at www.americancentury.com*

*    using our Automated Information Line (1-800-345-8765)*

*    calling an Investor Relations Representative at 1-800-345-2021*

*    writing us a letter

HOW DO I DECIDE  WHETHER A TAXABLE MONEY MARKET FUND OR A TAX-FREE  MONEY MARKET
FUND IS RIGHT FOR ME?

     The most important  factor to consider is your tax bracket.  Tax-free money
market funds  typically  offer lower yields than taxable  funds,  but you pay no
federal income taxes on the income from a tax-free fund.

     If you are in one of the higher federal income tax brackets, taxes will eat
up a big part of your income from a taxable  money  market  fund,  so a tax-free
investment may be better for you. If you're in a lower tax bracket, then you can
usually earn more in a taxable fund even after taxes are deducted.

     We can help you  figure it out.  If you give us a call and tell us what tax
bracket  you're in, we can tell you whether you're likely to earn more after-tax
income in a tax-free or a taxable money market fund.

IF YOU HAVE ANY  QUESTIONS  ABOUT OUR MONEY MARKET  FUNDS,  CALL US TOLL FREE AT
1-800-345-2021 OR E-MAIL US AT OUR WEB SITE, WWW.AMERICANCENTURY.COM.

*  Before an investor  can make an  exchange  by calling an  Investor  Relations
   Representative,  using our  Automated  Information  Line, or visiting our Web
   site, the investor first must have provided us with written  authorization to
   do so.

[right margin]

A FASTER AND EASIER WAY TO DEPOSIT MUTUAL FUND DISTRIBUTIONS

If you prefer to get your fund dividend or capital gains  distributions  sent to
you  instead of  reinvesting  them,  there are a couple of ways that you can get
access to this money faster than waiting for a check in the mail:

*    YOU CAN HAVE DISTRIBUTIONS DEPOSITED DIRECTLY INTO YOUR MONEY MARKET
     ACCOUNT. The money will be deposited the same day that the distributions
     are paid.

*    DISTRIBUTIONS CAN BE SENT ELECTRONICALLY TO YOUR BANK ACCOUNT. The money
     will be available in your bank account within three days.

Contact  our  Investor  Relations  Representatives  to set up  either  of  these
options.


                                                  www.americancentury.com      3


Capital Preservation--Performance
- --------------------------------------------------------------------------------

<TABLE>
TOTAL RETURNS AS OF MARCH 31, 1999

                         CAPITAL         90-DAY U.S.       U.S. TREASURY MONEY MARKET FUNDS(2)
                      PRESERVATION   TREASURY BILL INDEX    AVERAGE RETURN   FUND'S RANKING
<S>                    <C>               <C>              <C>                   <C>
6 MONTHS(1)               2.18%            2.19%                 2.06%              --
1 YEAR                    4.72%            4.72%                 4.49%         16 OUT OF 93
======================================= =====================================================
AVERAGE ANNUAL RETURNS
======================================= =====================================================
3 YEARS                   4.86%            5.01%                 4.69%         16 OUT OF 80
5 YEARS                   4.82%            5.09%                 4.69%         16 OUT OF 67
10 YEARS                  5.00%            5.21%                 4.96%          8 OUT OF 21
</TABLE>

The fund's inception date was 10/13/72.

(1)  Returns for periods less than one year are not annualized.

(2)  According to Lipper Inc., an independent mutual fund ranking service.

See pages 22-23 for more information about returns,  the comparative  index, and
Lipper fund rankings.

PORTFOLIO AT A GLANCE
                            3/31/99           3/31/98
NUMBER OF SECURITIES          20                14
WEIGHTED AVERAGE
MATURITY                    64 DAYS           48 DAYS
  EXPENSE RATIO              0.48%             0.49%

YIELDS AS OF MARCH 31, 1999
  7-DAY CURRENT YIELD                 4.17%
  7-DAY EFFECTIVE YIELD               4.26%

Past performance does not guarantee future results.

Money market funds are neither  insured nor  guaranteed by the FDIC or any other
government agency.

Yields will fluctuate, and although the fund seeks to preserve the value of your
investment  at $1 per share,  it is possible to lose money by  investing  in the
fund. The 7-day yield more closely reflects  earnings of the fund than the total
return.


4      1-800-345-2021


Capital Preservation--Q&A
- --------------------------------------------------------------------------------
/photo of Amy O'Donnell/

     An  interview  with Amy  O'Donnell,  a  portfolio  manager  on the  Capital
Preservation fund investment team.

HOW DID CAPITAL PRESERVATION PERFORM DURING THE YEAR ENDED MARCH 31, 1999?

     The fund  continued to outperform  the average  Treasury money market fund.
For the fiscal year ended March 31, 1999, Capital  Preservation  returned 4.72%,
compared with the 4.49%  average  return of the 93 "U.S.  Treasury  Money Market
Funds" tracked by Lipper Inc. This performance ranked the fund in the top 20% of
its Lipper group. (See the previous page for other performance comparisons.)

     The fund also had a higher  yield than the average  Treasury  money  market
fund.  Capital  Preservation's  7-day  current  yield as of March 31 was  4.17%,
compared  with the  4.05%  yield  of the  average  Treasury  money  market  fund
(according to Lipper).

THE FUND'S  YIELD HAS COME DOWN  QUITE A BIT IN THE PAST YEAR  (4.94% TO 4.17%).
WHY?

     The  decline in the fund's  yield  reflects  a general  drop in  short-term
interest rates in 1998.  Economic and financial problems in various parts of the
world led to  increased  volatility  in the global  financial  markets.  In this
environment,  many investors looked to U.S. Treasury securities as a safe haven.
Strong demand sent yields down sharply--the three-month Treasury bill yield fell
from around 5% at mid-year to a low of 3.6% in October.

     In addition,  the Federal  Reserve (the U.S.  central bank) cut  short-term
interest  rates three times in a six-week  period to help stabilize the markets.
The Fed lowered its federal  funds rate target-- a widely  watched  barometer of
short-term  interest  rates--from  5.5% to  4.75%  between  late  September  and
mid-November.

     Global economic  conditions improved in early 1999, and rates bounced back.
The  three-month  T-bill yield rose as high as 4.7% in February  before  sliding
back to 4.5% by the end of March.

HOW DID YOU POSITION THE FUND IN THIS ENVIRONMENT?

     With  rates   falling,   we  spent  much  of  the  past  year  looking  for
opportunities to extend the fund's average  maturity.  A longer average maturity
allows the  portfolio to lock in higher  yields for an extended  period of time,
delaying the effects of lower rates on the fund's yield.

     By August, Capital Preservation's average maturity was around 80 days, well
above the fund's  neutral  position of 50-60  days.  We even  lengthened  out to
almost 90 days,  the legal limit for money market funds,  right before the Fed's
final interest rate cut in November.

BUT THE FUND'S AVERAGE MATURITY WAS CLOSER TO 60 DAYS BY THE END OF MARCH. WHY?

     There were times when we allowed Capital Preservation's average maturity to
shorten back to neutral,  and March was one of those times.  The fund's  average
maturity was about 80 days at the end of February, when the three-

[right margin]

"WITH RATES FALLING, WE SPENT MUCH OF THE PAST YEAR LOOKING FOR OPPORTUNITIES
TO EXTEND THE FUND'S AVERAGE MATURITY."

[pie charts - data below]

PORTFOLIO COMPOSITION BY
SECURITY TYPE

As of March 31, 1999
Treasury Bills         87%
Treasury Notes         13%

As of September 30, 1998
Treasury Bills         54%
Treasury Notes         46%

Security types are defined on pages 23-24.


                                                  www.americancentury.com      5


Capital Preservation--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

month  T-bill  yield  peaked  at  4.7%.  With  rates  falling  and few  maturing
securities in the portfolio,  we made virtually no changes in March, letting the
average maturity roll down to around 60 days by the end of the month.

IN PAST REPORTS,  YOU'VE TALKED ABOUT  INVESTING IN "DOLLAR ROLLS." DO YOU STILL
PARTICIPATE IN THESE TRANSACTIONS?

     Yes.  They've been a very  important  part of the  portfolio  over the past
couple of years. Dollar rolls are similar to repurchase agreements--they involve
buying a security, such as a Treasury bill or note, and agreeing to sell it back
at a specified price and date in the future (usually the next day or week).

     However,  in a dollar roll,  the fund actually owns the security  until the
sale date. In a repurchase agreement, the security only serves as collateral for
the agreement.  This is an important distinction,  because the interest you earn
from a Treasury  security is only exempt from state  income taxes if you own the
security.

WHAT'S THE ATTRACTION OF DOLLAR ROLLS?

     It's mainly the yield.  Even though we're  investing in Treasury  bills and
notes--just  like we've been doing since the fund started in 1972--the yields on
dollar rolls tend to track the federal  funds rate target  rather than  Treasury
yields. That's because the fed funds rate is an overnight lending rate, and most
dollar roll transactions cover similarly short periods.

     This has been a big advantage recently. The three-month Treasury bill yield
has been, on average,  40-50 basis points (0.40%-0.50%) lower than the fed funds
rate target over the past two years,  and  sometimes as much as 100 basis points
lower (see the chart at left). As a result, the fund has earned more from dollar
roll transactions than it would have by just buying and holding T-bills.

     We can  invest as much as a third of the  portfolio  in dollar  rolls,  and
we've been consistently at or near that limit during the past year.

WHAT'S YOUR OUTLOOK FOR SHORT-TERM INTEREST RATES?

     We think short-term  rates will be relatively  stable in the coming months.
The Fed appears to be on hold for a while--the U.S. economy is healthy enough to
keep the Fed from cutting rates,  while  inflation is low enough to keep the Fed
from raising rates.  The three-month  T-bill yield has hovered between 4.25% and
4.5% in recent  months,  and we expect it to remain in a similarly  narrow range
for the foreseeable future.

WHAT ARE YOUR PLANS FOR CAPITAL PRESERVATION OVER THE NEXT SIX MONTHS?

     For now, we plan to maintain the fund's neutral average maturity. We'll try
to do some  "range  trading"--we'll  look to extend the  average  maturity  when
T-bill  yields are at the top of their  recent  range,  and we'll let it shorten
when yields are toward the bottom of the range.

[left margin]

"THE FED APPEARS TO BE ON HOLD FOR A WHILE--THE U.S. ECONOMY IS HEALTHY ENOUGH
TO KEEP THE FED FROM CUTTING RATES, WHILE INFLATION IS LOW ENOUGH TO KEEP THE
FED FROM RAISING RATES."

[line graph - data below]

THREE-MONTH T-BILL YIELD VS.
FEDERAL FUNDS RATE

                      Three-Month
                     Treasury Bill          Fed Funds Rate
3/31/97                  5.32%                  5.50%
4/30/97                  5.23%                  5.50%
5/31/97                  4.94%                  5.50%
6/30/97                  5.17%                  5.50%
7/31/97                  5.23%                  5.50%
8/31/97                  5.22%                  5.50%
9/30/97                  5.10%                  5.50%
10/31/97                 5.20%                  5.50%
11/30/97                 5.20%                  5.50%
12/31/97                 5.35%                  5.50%
1/31/98                  5.18%                  5.50%
2/28/98                  5.31%                  5.50%
3/31/98                  5.12%                  5.50%
4/30/98                  4.97%                  5.50%
5/31/98                  5.01%                  5.50%
6/30/98                  5.08%                  5.50%
7/31/98                  5.08%                  5.50%
8/31/98                  4.83%                  5.50%
9/30/98                  4.36%                  5.25%
10/31/98                 4.32%                  5.00%
11/30/98                 4.48%                  4.75%
12/31/98                 4.45%                  4.75%
1/31/99                  4.45%                  4.75%
2/28/99                  4.67%                  4.75%
3/31/99                  4.48%                  4.75%

Source: Bloomberg Financial Markets


6      1-800-345-2021


Capital Preservation--Schedule of Investments
- --------------------------------------------------------------------------------

MARCH 31, 1999

Principal Amount                                                       Value
- --------------------------------------------------------------------------------
U.S. TREASURY BILLS(1)--87.5%
             $  25,000,000  U.S. Treasury Bills,
                                4.35%-4.47%, 4/1/99              $   25,000,000
               300,000,000  U.S. Treasury Bills,
                                4.35%-4.84%, 4/15/99                299,436,209
               495,000,000  U.S. Treasury Bills,
                                3.81%-4.79%, 4/22/99                493,632,210
               150,000,000  U.S. Treasury Bills,
                                4.29%-4.37%, 4/29/99                149,492,111
               200,000,000  U.S. Treasury Bills,
                                4.37%-4.44%, 5/6/99                 199,151,250
               300,000,000  U.S. Treasury Bills,
                                4.38%-4.52%, 5/13/99                298,455,334
               200,000,000  U.S. Treasury Bills,
                                4.42%-4.57%, 5/20/99                198,776,701
                50,000,000  U.S. Treasury Bills,
                                4.45%-4.54%, 5/27/99                 49,653,889
               100,000,000  U.S. Treasury Bills,
                                4.38%-4.57%, 6/3/99                  99,216,437
               125,000,000  U.S. Treasury Bills,
                                4.34%-4.38%, 6/17/99                123,832,167
               380,000,000  U.S. Treasury Bills,
                                4.28%-4.54%, 7/1/99                 375,826,930
               100,000,000  U.S. Treasury Bills,
                                4.29%-4.40%, 7/8/99                  98,818,555

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

             $  50,000,000  U.S. Treasury Bills, 4.29%,
                                7/29/99                          $   49,290,958
               200,000,000  U.S. Treasury Bills,
                                4.39%-4.40%, 8/5/99                 196,923,500
               100,000,000  U.S. Treasury Bills, 4.42%,
                                8/19/99                              98,279,168
                50,000,000  U.S. Treasury Bills,
                                4.50%-4.53%, 9/16/99                 48,941,833
                                                                 ---------------
TOTAL U.S. TREASURY BILLS                                         2,804,727,252
                                                                 ---------------

U.S. TREASURY NOTES(1)--12.5%
               100,000,000  U.S. Treasury Notes, 6.375%,
                                5/15/99                             100,180,921
                50,000,000  U.S. Treasury Notes, 6.75%,
                                5/31/99                              50,162,136
               200,000,000  U.S. Treasury Notes, 6.00%,
                                8/15/99                             200,955,802
                50,000,000  U.S. Treasury Notes, 7.125%,
                                9/30/99                              50,586,074
                                                                 ---------------
TOTAL U.S. TREASURY NOTES                                           401,884,933
                                                                 ---------------
TOTAL INVESTMENT SECURITIES--100.0%                              $3,206,612,185
                                                                 ===============

NOTES TO SCHEDULE OF INVESTMENTS

(1)  The rates for U.S.  Treasury  Bills are the yield to maturity at  purchase.
     The rates for U.S. Treasury Notes are the stated coupon rates.

- --------------------------------------------------------------------------------
UNDERSTANDING  THE  SCHEDULE  OF  INVESTMENTS--This  schedule  tells  you  which
investments your fund owned on the last day of the reporting period.

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the amortized cost of each investment

* the percent and dollar breakdown of each investment category

See Notes to Financial Statements


                                                  www.americancentury.com      7


Government Agency--Performance
- --------------------------------------------------------------------------------

<TABLE>
TOTAL RETURNS AS OF MARCH 31, 1999

                      GOVERNMENT       90-DAY U.S.      U.S. GOVERNMENT MONEY MARKET FUNDS(2)
                        AGENCY     TREASURY BILL INDEX    AVERAGE RETURN    FUND'S RANKING
<S>                      <C>              <C>             <C>                  <C>
6 MONTHS(1)              2.30%           2.19%                2.19%               --
1 YEAR                   4.91%           4.72%                4.72%          22 OUT OF 114
===========================================================================================
AVERAGE ANNUAL RETURNS
===========================================================================================
3 YEARS                  4.98%           5.01%                4.85%          25 OUT OF 103
5 YEARS                  4.95%           5.09%                4.81%          20 OUT OF 84
LIFE OF FUND             4.97%           4.97%(3)             4.71%(3)       4 OUT OF 48(3)
</TABLE>

The fund's inception date was 12/5/89.

(1)  Returns for periods less than one year are not annualized.

(2)  According to Lipper Inc., an independent mutual fund ranking service.

(3)  Since  12/31/89,  the date nearest the fund's  inception for which data are
     available.

See pages 22-23 for more information about returns,  the comparative  index, and
Lipper fund rankings.

PORTFOLIO AT A GLANCE
                            3/31/99           3/31/98
NUMBER OF SECURITIES          37                28
WEIGHTED AVERAGE
  MATURITY                  73 DAYS           50 DAYS
EXPENSE RATIO                0.48%             0.51%

YIELDS AS OF MARCH 31, 1999
  7-DAY CURRENT YIELD                 4.37%
  7-DAY EFFECTIVE YIELD               4.47%

Past performance does not guarantee future results.

Money market funds are neither  insured nor  guaranteed by the FDIC or any other
government agency.

Yields will fluctuate, and although the fund seeks to preserve the value of your
investment  at $1 per share,  it is possible to lose money by  investing  in the
fund. The 7-day yield more closely reflects  earnings of the fund than the total
return.


8      1-800-345-2021


Government Agency--Q&A
- --------------------------------------------------------------------------------

     An interview with Amy O'Donnell  (pictured on page 5), a portfolio  manager
on the Government Agency Money Market fund investment team.

HOW DID GOVERNMENT AGENCY PERFORM DURING THE YEAR ENDED MARCH 31, 1999?

     The fund continued to outperform the average  government money market fund.
For the fiscal year ended March 31,  1999,  Government  Agency  returned  4.91%,
compared with the 4.72% average return of the 114 "U.S.  Government Money Market
Funds" tracked by Lipper Inc. This performance ranked the fund in the top 20% of
its Lipper group. (See the previous page for other performance comparisons.)

     The fund also had a higher yield than the average  government  money market
fund. Government Agency's 7-day current yield as of March 31 was 4.37%, compared
with the 4.30% yield of the average  government  money market fund (according to
Lipper).

THE FUND'S  YIELD HAS COME DOWN  QUITE A BIT IN THE PAST YEAR  (5.05% TO 4.37%).
WHY?

     The  decline in the fund's  yield  reflects  a general  drop in  short-term
interest rates in 1998.  Economic and financial problems in various parts of the
world led to  increased  volatility  in the global  financial  markets.  In this
environment,  many  investors  looked to U.S.  government  securities  as a safe
haven. Strong demand sent yields down sharply.

     In addition,  the Federal  Reserve (the U.S.  central bank) cut  short-term
interest  rates three times in a six-week  period to help stabilize the markets.
The Fed lowered its federal funds rate  target--a  widely  watched  barometer of
short-term  interest  rates--from  5.5% to  4.75%  between  late  September  and
mid-November.

     Global  economic  conditions  improved in early 1999, and government  money
market rates  stabilized,  hovering in a narrow  range around the federal  funds
rate target.

HOW DID YOU POSITION THE FUND IN THIS ENVIRONMENT?

     With  rates   falling,   we  spent  much  of  the  past  year  looking  for
opportunities to extend the fund's average  maturity.  A longer average maturity
allows the  portfolio to lock in higher  yields for an extended  period of time,
delaying the effects of lower rates on the fund's yield.

     By August,  Government  Agency's  average maturity was around 80 days, well
above the fund's neutral  position of 50-60 days. We also lengthened the average
maturity during the period when the Fed cut interest rates three times.

BUT THE FUND'S AVERAGE MATURITY WAS CLOSER TO 70 DAYS BY THE END OF MARCH. WHY?

     There were times when we allowed  Government  Agency's  average maturity to
shorten back toward neutral. For example, the average maturity fell from 80 days
at the end of November to around 55 days in late January. The end of the year is
a volatile period for short-term  interest rates, so we stayed out of the market
for the most part, letting the portfolio's average maturity drift in.

     March was also one of those  times.  We had  extended  the  fund's  average
maturity  back out to about 80 days at the end of  February.  With few  maturing
securities in the portfolio,  we made virtually no changes in March, letting the
average maturity roll down to around 70 days by the end of the month.

[right marginj]

"WITH RATES FALLING, WE SPENT MUCH OF THE PAST YEAR LOOKING FOR OPPORTUNITIES
TO EXTEND THE FUND'S AVERAGE MATURITY."

[pie charts - data below]

PORTFOLIO COMPOSITION BY
SECURITY TYPE

As of March 31, 1999
Government Agency Discount Notes      68%
Government Agency Notes               17%
Floating-Rate Agency Notes             9%
Treasury Bills                         6%

As of September 30, 1998
Government Agency Discount Notes      80%
Government Agency Notes               13%
Floating-Rate Agency Notes             7%

Security types are defined on pages 23-24.


                                                  www.americancentury.com      9


Government Agency--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHAT GOVERNMENT AGENCY SECURITIES  WERE THE MOST ATTRACTIVE DURING THE FISCAL
YEAR?

     We focused  mainly on those  issued by the Federal  Home Loan Bank  (FHLB).
Although we held a few securities issued by the Student Loan Market  Association
(SLMA) and the Federal Farm Credit Bank (FFCB),  the vast majority were from the
FHLB.

     With the  strength of the housing  market over the past year,  the FHLB has
continued its regular  issuance of  short-term  securities.  In contrast,  other
agencies have  generally cut back on their  issuance.  The higher supply of FHLB
securities  meant their  yields were  higher than most other  short-term  agency
securities.

     In fact, to extend  Government  Agency's average  maturity in February,  we
purchased  some  one-year FHLB notes that were yielding more than 5%. That was a
nice yield pick-up when most agency notes were yielding around 4.75%.

LOOKING AHEAD, WHAT'S YOUR OUTLOOK FOR SHORT-TERM INTEREST RATES?

     We think short-term  rates will be relatively  stable in the coming months.
The Fed appears to be on hold for a while--the U.S. economy is healthy enough to
keep the Fed from cutting rates,  while  inflation is low enough to keep the Fed
from raising rates. We expect yields of short-term  government agency securities
to remain in a narrow  range  around the federal  funds rate target of 4.75% for
the foreseeable future.

WHAT ARE YOUR PLANS FOR GOVERNMENT AGENCY OVER THE NEXT SIX MONTHS?

     For now, we plan to maintain a neutral  average  maturity.  We'll try to do
some  "range  trading"--we'll  look to extend the average  maturity  when agency
yields  are at the top of their  recent  range,  and we'll let it  shorten  when
yields are toward the bottom of the range.

[left margin]

"THE FED APPEARS TO BE ON HOLD FOR A WHILE--THE U.S. ECONOMY IS HEALTHY ENOUGH
TO KEEP THE FED FROM CUTTING RATES, WHILE INFLATION IS LOW ENOUGH TO KEEP THE
FED FROM RAISING RATES."

[pie charts - data below]

PORTFOLIO COMPOSITION BY
MATURITY

As of March 31, 1999
1-30 days           39%
31-60 days          21%
61-90 days          18%
91-180 days         10%
181-397 days        12%

As of September 30, 1998
1-30 days           30%
31-60 days          25%
61-90 days          32%
91-180 days          9%
181-397 days         4%


10      1-800-345-2021


Government Agency--Schedule of Investments
- --------------------------------------------------------------------------------

MARCH 31, 1999

Principal Amount                                                      Value
- --------------------------------------------------------------------------------
U.S. TREASURY BILLS(1)--5.9%
              $30,000,000  U.S. Treasury Bills, 4.74%,
                              4/22/99                             $ 29,917,050
                                                                 --------------
U.S. GOVERNMENT AGENCY DISCOUNT NOTES(1)--67.8%
               20,000,000  FFCB Discount Notes, 4.87%,
                              4/14/99                               19,964,829
                8,550,000  FFCB Discount Notes, 4.74%,
                              4/30/99                                8,517,353
               10,000,000  FFCB Discount Notes, 4.75%,
                              6/29/99                                9,882,569
                8,975,000  FHLB Discount Notes, 4.68%,
                              4/5/99                                 8,970,333
                7,000,000  FHLB Discount Notes, 4.50%,
                              4/14/99                                6,988,612
               14,500,000  FHLB Discount Notes, 4.69%,
                              4/23/99                               14,458,442
               17,000,000  FHLB Discount Notes, 4.68%,
                              4/28/99                               16,940,330
               43,000,000  FHLB Discount Notes,
                              4.69%-4.86%, 4/30/99                  42,834,160
                7,500,000  FHLB Discount Notes, 4.78%,
                              5/5/99                                 7,466,141
               25,000,000  FHLB Discount Notes, 4.74%,
                              5/12/99                               24,865,042
                7,000,000  FHLB Discount Notes, 4.73%,
                              5/21/99                                6,953,965
                2,025,000  FHLB Discount Notes, 4.75%,
                              5/24/99                                2,010,839
               23,000,000  FHLB Discount Notes,
                              4.75%-4.76%, 5/26/99                  22,832,815
               20,000,000  FHLB Discount Notes, 4.76%,
                              5/28/99                               19,849,266
                5,000,000  FHLB Discount Notes, 4.74%,
                              6/11/99                                4,953,258
               15,000,000  FHLB Discount Notes, 4.76%,
                              6/15/99                               14,851,250
               15,000,000  FHLB Discount Notes, 4.73%,
                              6/16/99                               14,850,217

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

             $  6,951,000  FHLB Discount Notes, 4.75%,
                              6/16/99                             $  6,881,297
                5,000,000  FHLB Discount Notes, 4.76%,
                              6/23/99                                4,945,128
               10,000,000  FHLB Discount Notes, 4.93%,
                              7/12/99                                9,865,914
               15,260,000  FHLB Discount Notes,
                              4.64%-4.69%, 8/4/99                   15,013,071
               31,000,000  FHLB Discount Notes,
                              4.66%-4.69%, 8/6/99                   30,489,178
               27,500,000  SLMA Discount Notes, 4.72%,
                              6/30/99                               27,175,469
                                                                 --------------
TOTAL U.S. GOVERNMENT AGENCY
DISCOUNT NOTES                                                     341,559,478
                                                                 --------------
U.S. GOVERNMENT AGENCY SECURITIES(1)--26.3%
                6,550,000  FFCB, 4.84%, 6/1/99                       6,548,633
                7,000,000  FFCB MTN, 5.50%, 4/1/99                   7,000,000
                8,000,000  FFCB MTN, 5.60%, 5/3/99                   8,004,494
               10,000,000  FFCB MTN, 5.00%, 2/18/00                 10,000,000
                9,500,000  FHLB, 5.72%, 5/6/99                       9,506,413
                4,000,000  FHLB, 5.83%, 6/11/99                      4,005,796
                1,500,000  FHLB, 8.60%, 6/25/99                      1,512,555
               10,000,000  FHLB, 5.06%, 3/1/00                      10,000,366
               10,000,000  FHLB, 5.16%, 3/22/00                     10,000,936
               30,000,000  FHLB, VRN, 4.77%, 4/1/99,
                              resets daily off the Fed
                              Funds rate with no caps               30,003,109
               15,000,000  FHLB, VRN, 4.79%, 4/8/99,
                              resets monthly off the 1-month
                              LIBOR minus 0.18% with
                              no caps                               14,996,842
               10,000,000  SLMA MTN, 4.90%, 10/29/99                 9,999,711
               11,000,000  SLMA MTN, 4.93%, 2/8/00                  10,990,681
                                                                 --------------
TOTAL U.S. GOVERNMENT
AGENCY SECURITIES                                                  132,569,536
                                                                 --------------
TOTAL INVESTMENT SECURITIES--100.0%                               $504,046,064
                                                                 ==============

See Notes to Financial Statements


                                                 www.americancentury.com      11


Government Agency--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

NOTES TO SCHEDULE OF INVESTMENTS

FFCB = Federal Farm Credit Bank

FHLB = Federal Home Loan Bank

LIBOR = London Interbank Offered Rate

MTN = Medium Term Note

SLMA = Student Loan Marketing Association

resets   = The  frequency  with  which a  security's  coupon  changes,  based on
         current market conditions or an underlying index. The more frequently a
         security  resets,  the less risk the investor is taking that the coupon
         will vary significantly from current market rates.

VRN   =  Variable  Rate  Note.  Interest  reset  date is  indicated  and used in
      calculating  the  weighted  average  portfolio  maturity.  Rate  shown  is
      effective March 31, 1999.

(1)  The rates for U.S. Treasury Bills and U.S. Government Agency Discount Notes
     are the yield to maturity at purchase. The rates for U.S. Government Agency
     Securities are the stated coupon rates.

- --------------------------------------------------------------------------------
UNDERSTANDING  THE  SCHEDULE  OF  INVESTMENTS--This  schedule  tells  you  which
investments your fund owned on the last day of the reporting period.

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the amortized cost of each investment

* the percent and dollar breakdown of each investment category

                                              See Notes to Financial Statements


12      1-800-345-2021


Statements of Assets and Liabilities
- --------------------------------------------------------------------------------

                                                  CAPITAL          GOVERNMENT
MARCH 31, 1999                                 PRESERVATION          AGENCY

ASSETS
Investment securities, at value
  (amortized cost and cost
  for federal income tax purposes) .........  $3,206,612,185      $504,046,064
Cash .......................................    6,874,313            968,809
Receivable for investments sold ............   773,775,024         27,024,413
Interest receivable ........................    11,954,991          1,651,220
                                             ----------------    --------------
                                              3,999,216,513        533,690,506
                                             ----------------    --------------

LIABILITIES
Disbursements in excess of
  demand deposit cash ......................    1,916,958           5,573,911
Payable for investments purchased ..........   670,800,357             --
Payable for capital shares redeemed ........     355,836             58,405
Accrued management fees (Note 2) ...........    1,333,811            213,959
Payable for trustees' fees and expenses ....      4,611               2,230
                                             ----------------    --------------
                                               674,411,573          5,848,505
                                             ----------------    --------------
Net Assets .................................  $3,324,804,940      $527,842,001
                                             ================    ==============

CAPITAL SHARES
Outstanding (unlimited number
  of shares authorized) ....................  3,324,804,940        527,842,001
                                             ================    ==============
Net Asset Value Per Share ..................      $1.00               $1.00
                                             ================    ==============
NET ASSETS CONSIST OF:
Capital paid in ............................  $3,324,804,940      $527,842,001
                                             ================    ==============

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF ASSETS AND  LIABILITIES--This  statement details
what the fund owns (assets),  what it owes (liabilities),  and its net assets as
of the last day of the period.  If you subtract  what the fund owes from what it
owns, you get the fund's net assets.  The net assets divided by the total number
of shares  outstanding  gives you the price of an individual  share,  or the net
asset value per share.

NET ASSETS consists of capital (money invested by shareholders).

See Notes to Financial Statements


                                                 www.americancentury.com      13


Statements of Operations
- --------------------------------------------------------------------------------

                                                  CAPITAL         GOVERNMENT
YEAR ENDED MARCH 31, 1999                      PRESERVATION         AGENCY

INVESTMENT INCOME
Income:
Interest ...................................   $159,797,409      $26,447,798
                                              --------------    -------------
Expenses (Note 2):
Management fees ............................    15,124,623        2,378,090
Trustees' fees and expenses ................      53,290           18,886
                                              --------------    -------------
                                                15,177,913        2,396,976
                                              --------------    -------------
Net investment income ......................   144,619,496       24,050,822
                                              --------------    -------------

NET REALIZED GAIN
ON INVESTMENTS
Net realized gain on investments ...........    2,730,059          33,582
                                              --------------    -------------
Net Increase in Net Assets
Resulting from Operations ..................   $147,349,555      $24,084,404
                                              ==============    =============

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF OPERATIONS--This  statement breaks down how each
fund's  net  assets  changed  during  the  period  as a  result  of  the  fund's
operations.  It tells you how much money the fund made or lost after taking into
account income,  fees and expenses,  and investment gains or losses. It does not
include shareholder transactions and distributions.

Fund OPERATIONS include:

* income earned from investments

* management fees and other expenses

* gains or losses from selling investments (known as realized gains or losses)

                                              See Notes to Financial Statements


14      1-800-345-2021


<TABLE>
<CAPTION>
Statements of Changes in Net Assets
- --------------------------------------------------------------------------------

YEARS ENDED MARCH 31, 1999 AND MARCH 31, 1998

                                           CAPITAL PRESERVATION                 GOVERNMENT AGENCY
Increase in Net Assets                    1999              1998              1999             1998

OPERATIONS
<S>                                    <C>               <C>              <C>               <C>
Net investment income ...............  $144,619,496      $149,388,171     $24,050,822       $23,534,891
Net realized gain (loss)
  on investments ....................   2,730,059         1,225,909          33,582          (22,473)
                                     ---------------   ---------------   --------------   --------------
Net increase in net assets
  resulting from operations .........  147,349,555       150,614,080       24,084,404       23,512,418
                                     ---------------   ---------------   --------------   --------------

DISTRIBUTIONS TO
SHAREHOLDERS
From net investment income ..........  (144,619,496)     (149,514,002)    (24,050,822)     (23,534,891)
From net realized gains on
  investment transactions ...........   (2,673,276)       (1,199,172)       (11,109)            --
                                     ---------------   ---------------   --------------   --------------
Decrease in net assets from
  distributions to shareholders .....  (147,292,772)     (150,713,174)    (24,061,931)     (23,534,891)
                                     ---------------   ---------------   --------------   --------------

CAPITAL SHARE
TRANSACTIONS
Proceeds from shares sold ........... 2,907,552,494     2,473,239,090     431,797,001       392,750,417
Proceeds from shares issued
  in connection
  with acquisition (Note 3) .........      --            213,901,483          --                --
Proceeds from reinvestment
  of distributions ..................  140,391,935       143,557,124       23,167,326       22,581,430
Payments for shares redeemed ........(2,867,779,879)   (2,664,029,704)   (414,936,146)    (398,276,839)
                                     ---------------   ---------------   --------------   --------------
Net increase in net assets from
  capital share transactions ........  180,164,550       166,667,993       40,028,181       17,055,008
                                     ---------------   ---------------   --------------   --------------
Net increase in net assets ..........  180,221,333       166,568,899       40,050,654       17,032,535

NET ASSETS
Beginning of year ................... 3,144,583,607     2,978,014,708     487,791,347       470,758,812
                                     ---------------   ---------------   --------------   --------------
End of year ......................... $3,324,804,940    $3,144,583,607    $527,842,001     $487,791,347
                                     ===============   ===============   ==============   ==============

TRANSACTIONS IN SHARES
OF THE FUNDS
Sold ................................ 2,907,552,494     2,473,239,090     431,797,001       392,750,417
Issued in connection
  with acquisition (Note 3) .........       --           213,901,483          --                --
Issued in reinvestment
  of distributions ..................  140,391,935       143,557,124       23,167,326       22,581,430
Redeemed ............................(2,867,779,879)   (2,664,029,704)   (414,936,146)    (398,276,839)
                                     ---------------   ---------------   --------------   --------------
Net increase ........................  180,164,550       166,667,993       40,028,181       17,055,008
                                     ===============   ===============   ==============   ==============
</TABLE>

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF CHANGES IN NET ASSETS--These statements show how
each fund's net assets changed over the past two reporting  periods.  It details
how much a fund grew or shrank as a result of:

* operations--a summary of the Statement of Operations from the previous page
  for the most recent period

* distributions--income and gains distributed to shareholders

* share transactions--shareholders' purchases, reinvestments, and redemptions

Net  assets  at the  beginning  of  the  period  plus  the  sum  of  operations,
distributions  to  shareholders  and capital  share  transactions  result in net
assets at the end of the period.

See Notes to Financial Statements


                                                 www.americancentury.com      15


Notes to Financial Statements
- --------------------------------------------------------------------------------

MARCH 31, 1999

1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     ORGANIZATION  -- American  Century  Government  Income Trust (the trust) is
registered  under the Investment  Company Act of 1940 as an open-end  management
investment  company.   Capital  Preservation  Fund  (Capital  Preservation)  and
Government  Agency Money Market Fund (Government  Agency) (the funds) are two of
the eight funds issued by the trust.  Capital  Preservation seeks maximum safety
and  liquidity  and intends to pursue its  investment  objectives  by  investing
exclusively in short-term U.S. Treasury securities guaranteed by the direct full
faith and  credit  pledge of the U.S.  government.  Government  Agency  seeks to
provide the highest rate of current return on its  investments,  consistent with
safety of principal and  maintenance  of liquidity by investing  exclusively  in
short-term   obligations   of  the  U.S.   government   and  its   agencies  and
instrumentalities.  The funds are authorized to issue two classes of shares: the
Investor  Class  and  the  Advisor  Class.  The two  classes  of  shares  differ
principally in their respective  shareholder servicing and distribution expenses
and  arrangements.  All shares of the funds represent an equal pro rata interest
in the  assets of the class to which  such  shares  belong,  and have  identical
voting,  dividend,   liquidation  and  other  rights  and  the  same  terms  and
conditions,  except for class specific  expenses and exclusive rights to vote on
matters  affecting  only  individual  classes.  Sale of the Advisor Class by the
funds  had not  commenced  as of the  report  date.  The  following  significant
accounting  policies  are  in  accordance  with  generally  accepted  accounting
principles;   these  principles  may  require  the  use  of  estimates  by  fund
management.

     SECURITY  VALUATIONS  --  Securities  are valued at amortized  cost,  which
approximates  current market value.  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 as of the
trade date. 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 accretion of discounts and amortization of premiums.

     FORWARD COMMITMENTS -- Periodically,  the funds enter into purchase or sale
transactions on a forward  commitment  basis. In these  transactions,  the funds
sell a security  and at the same time make a  commitment  to  purchase  the same
security  at a future  date at a  specified  price.  Conversely,  the  funds may
purchase  a  security  and at the same time make a  commitment  to sell the same
security at a future date at a specified price.  These types of transactions are
executed  simultaneously  in what are  known as  forward  commitments  or "roll"
transactions.  Capital  Preservation  and Government  Agency had  receivables on
forward commitment  transactions of $773,775,024 and $27,024,413,  respectively.
The funds take  possession of any security they purchase in these  transactions.
The funds maintain  segregated  accounts consisting of cash or liquid securities
in an amount sufficient to meet the purchase price.

     INCOME  TAX  STATUS  -- It is the  funds'  policy  to  distribute  all  net
investment  income  and net  realized  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
income taxes.

     DISTRIBUTIONS -- Distributions  from net investment income are declared and
credited daily and distributed  monthly.  The funds do not expect to realize any
long-term  capital gains,  and  accordingly,  do not expect to pay any long-term
capital gains distributions.

     At March 31, 1999,  Government  Agency had accumulated net realized capital
loss carryovers of approximately  $22,788  (expiring in 2003 through 2006) which
may be used to offset future taxable gains.

     ADDITIONAL  INFORMATION  -- Funds  Distributor,  Inc.  (FDI) is the trust's
distributor. Certain officers of FDI are also officers of the trust.


16      1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
2. TRANSACTIONS WITH RELATED PARTIES

     The trust has entered into a Management  Agreement  with  American  Century
Investment  Management,  Inc.  (ACIM) that  provides  each fund with  investment
advisory and management  services in exchange for a single,  unified  management
fee per class.  Expenses  excluded  from this  agreement are  brokerage,  taxes,
portfolio  insurance,  interest,  fees and  expenses of the Trustees who are not
considered "interested persons" as defined in the Investment Company Act of 1940
(including counsel fees) and extraordinary expenses. The fee is calculated daily
and paid monthly. It consists of an Investment Category Fee based on the average
net assets of the funds in a specific fund's  investment  category and a Complex
Fee based on the average net assets of all the funds managed by ACIM.  The rates
for the Investment  Category fee range from 0.1370% to 0.2500% and the rates for
the Complex Fee  (Investor  Class)  range from  0.2900% to 0.3100%.  The Advisor
Class is 0.2500% less at each point  within the Complex Fee range.  For the year
ended March 31, 1999, the effective  annual  Investor  Class  management fee was
0.48% for each of the funds.

     The Board of Trustees has adopted the Advisor Class Master Distribution and
Shareholder  Services Plan (the plan),  pursuant to Rule 12b-1 of the Investment
Company Act of 1940.  The plan  provides  that the funds will pay ACIM an annual
distribution  fee equal to 0.25% and  service  fee equal to 0.25%.  The fees are
computed  daily and paid  monthly  based on the Advisor  Class's  average  daily
closing net assets  during the previous  month.  The  distribution  fee provides
compensation for distribution  expenses incurred by financial  intermediaries in
connection  with  distributing  shares of the Advisor Class  including,  but not
limited to, payments to brokers,  dealers, and financial  institutions that have
entered into sales  agreements with respect to shares of the funds.  The service
fee provides  compensation for shareholder and administrative  services rendered
by ACIM, its affiliates or independent third party providers.

     Certain  officers  and  trustees  of the  trust  are also  officers  and/or
directors,  and,  as a  group,  controlling  stockholders  of  American  Century
Companies,  Inc., the parent of the trust's  investment  manager,  ACIM, and the
trust's transfer agent, American Century Services Corporation.

- --------------------------------------------------------------------------------
3. REORGANIZATION PLAN

     On August 29, 1997, Capital Preservation  acquired all of the net assets of
American Century - Benham Capital  Preservation  Fund (Old CP Fund) and American
Century -Benham Capital Preservation Fund II (Capital Preservation II), pursuant
to a plan of reorganization approved by the acquired funds' shareholders on July
30, 1997.

     The  acquisition  was  accomplished  by a tax-free  exchange of 213,901,483
shares of Capital  Preservation,  the surviving fund in terms of maintaining the
financial  statements and performance history in the  post-reorganization  fund,
for 213,901,483  shares of Capital  Preservation  II,  outstanding on August 29,
1997.  The net  assets of  Capital  Preservation  and  Capital  Preservation  II
immediately  before  the  acquisition  were   $2,937,910,603  and  $213,901,483,
respectively.  Immediately  after the  acquisition,  the  combined net assets of
Capital Preservation were $3,151,812,086.

     At the same time,  Capital  Preservation was reorganized as a series issued
by American Century Government Income Trust.  Capital  Preservation was formerly
issued under American Century Capital Preservation Fund, Inc.

- --------------------------------------------------------------------------------
4. FUND EVENTS

   The following name changes became effective March 1, 1999:

              ==================================================================
               NEW NAME                    FORMER NAME
              ==================================================================

   FUND:       Capital Preservation Fund   American Century - Benham Capital
                                           Preservation Fund

   FUND:       Government Agency           American Century - Benham Government
               Money Market Fund           Agency Money Market Fund


                                                 www.americancentury.com      17


<TABLE>
<CAPTION>
Capital Preservation--Financial Highlights
- --------------------------------------------------------------------------------

                                      FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31

                                        1999         1998         1997         1996         1995
PER-SHARE DATA
Net Asset Value,
<S>                                    <C>          <C>          <C>          <C>          <C>
Beginning of Year ...................  $1.00        $1.00        $1.00        $1.00        $1.00
                                     ----------   ----------   ----------   ----------   ----------
Income From Investment Operations
  Net Investment Income .............   0.05         0.05         0.05         0.05         0.04
                                     ----------   ----------   ----------   ----------   ----------
Distributions
  From Net Investment Income ........  (0.05)       (0.05)       (0.05)       (0.05)       (0.04)
                                     ----------   ----------   ----------   ----------   ----------
Net Asset Value, End of Year ........   $1.00        $1.00        $1.00        $1.00        $1.00
                                     ==========   ==========   ==========   ==========   ==========
  Total Return(1) ...................   4.72%        5.06%        4.82%        5.21%        4.31%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets(2) ............   0.48%        0.49%        0.49%        0.51%        0.50%
Ratio of Net Investment Income
to  Average Net Assets ..............   4.53%        4.90%        4.66%        5.07%        4.24%
Net Assets, End of Year
(in thousands) ......................$3,324,805   $3,144,584   $2,978,015   $3,077,558   $2,883,350
</TABLE>

(1)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions, if any.
(2)  The  ratios  for years  ended  March 31,  1997 and March 31,  1996  include
     expenses paid through expense offset arrangements.

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL  HIGHLIGHTS--This  statement itemizes current period
activity and  statistics and provides  comparison  data for the last five fiscal
years.

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income

* income distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

* total return--the overall percentage return of the fund, assuming reinvestment
  of all distributions

* expense ratio--operating expenses as a percentage of average net assets

* net income ratio--net investment income as a percentage of average net assets

                                              See Notes to Financial Statements


18      1-800-345-2021


<TABLE>
<CAPTION>
Government Agency--Financial Highlights
- --------------------------------------------------------------------------------

                    FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31

                                       1999       1998       1997       1996       1995
PER-SHARE DATA
Net Asset Value,
<S>                                   <C>        <C>        <C>        <C>        <C>
Beginning of Year ................... $1.00      $1.00      $1.00      $1.00      $1.00
                                     --------   --------   --------   --------   --------
Income From Investment Operations
  Net Investment Income .............  0.05       0.05       0.05       0.05       0.04
                                     --------   --------   --------   --------   --------
Distributions
  From Net Investment Income ........ (0.05)     (0.05)     (0.05)     (0.05)     (0.04)
                                     --------   --------   --------   --------   --------
Net Asset Value, End of Year ........  $1.00      $1.00      $1.00      $1.00      $1.00
                                     ========   ========   ========   ========   ========
  Total Return(1) ...................  4.91%      5.14%      4.89%      5.35%      4.47%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets(2) ............  0.48%      0.51%      0.57%      0.51%      0.50%
Ratio of Net Investment Income
to Average Net Assets ...............  4.79%      5.02%      4.76%      5.20%      4.35%
Net Assets, End of Year
(in thousands) ......................$527,842   $487,791   $470,759   $503,328   $461,803
</TABLE>

(1)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions, if any.

(2)  The  ratios  for years  ended  March 31,  1997 and March 31,  1996  include
     expenses paid through expense offset arrangements.

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL  HIGHLIGHTS--This  statement itemizes current period
activity and  statistics and provides  comparison  data for the last five fiscal
years.

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income

* income distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

* total return--the overall percentage return of the fund, assuming reinvestment
  of all distributions

* expense ratio--operating expenses as a percentage of average net assets

* net income ratio--net investment income as a percentage of average net assets

See Notes to Financial Statements


                                                 www.americancentury.com      19


Report of Independent Accountants
- --------------------------------------------------------------------------------

To the Trustees of the American Century Government Income Trust
and Shareholders of the Capital Preservation Fund and  the Government Agency
Money Market Fund:

In our opinion, the accompanying statements of assets and liabilities, including
the schedules of  investments,  and the related  statements of operations and of
changes  in net assets  and the  financial  highlights  present  fairly,  in all
material  respects,  the  financial  position of the Capital  Preservation  Fund
(formerly  the  American  Century - Benham  Capital  Preservation  Fund) and the
Government  Agency Money  Market Fund  (formerly  the American  Century - Benham
Government  Agency  Money  Market  Fund) (two of the eight funds in the American
Century  Government Income Trust hereafter  referred to as the "Funds") at March
31, 1999, the results of each of their  operations for the year then ended,  the
changes in each of their net assets and the financial highlights for each of the
two years in the period  then  ended,  in  conformity  with  generally  accepted
accounting  principles.  The financial highlights for each of the three years in
the period  ended March 31, 1997 were  audited by other  auditors,  whose report
dated May 2, 1997,  expressed an unqualified opinion on those statements.  These
financial  statements  and  financial  highlights   (hereafter  referred  to  as
"financial  statements") are the  responsibility of the Funds'  management;  our
responsibility  is to express an opinion on these financial  statements based on
our audits. We conducted our audits of these financial  statements in accordance
with  generally  accepted  auditing  standards  which  require  that we plan and
perform the audit to obtain  reasonable  assurance  about  whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements,  assessing the accounting  principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe that our audits,  which included  confirmation of securities at March
31, 1999 by  correspondence  with the custodian,  provide a reasonable basis for
the opinion expressed above.

                                                      PricewaterhouseCoopers LLP

Kansas City, Missouri
May 7, 1999


20      1-800-345-2021


Retirement Account Information
- --------------------------------------------------------------------------------

RETIREMENT ACCOUNT INFORMATION

     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 rollover 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.


                                                 www.americancentury.com      21


Background Information
- --------------------------------------------------------------------------------

INVESTMENT PHILOSOPHY AND POLICIES

     American  Century offers 38 fixed-income  funds,  ranging from money market
portfolios  to long-term  bond funds and including  both taxable and  tax-exempt
funds. Each fund is managed to provide a "pure play" on a specific sector of the
fixed-income market. To ensure adherence to this principle,  the basic structure
of each fund's  portfolio  is tied to a specific  market  index.  Fund  managers
attempt  to add  value by making  modest  portfolio  adjustments  based on their
analysis of  prevailing  market  conditions.  Investment  decisions  are made by
management teams, which meet regularly to discuss market analysis and investment
strategies.

     In addition to these principles, each fund has its own investment policies

     CAPITAL  PRESERVATION  seeks to provide  interest  income exempt from state
taxes while maintaining a stable share price by investing in U.S. Treasury money
market securities.

     GOVERNMENT  AGENCY seeks to provide interest income exempt from state taxes
while  maintaining  a stable share price by investing in U.S.  government  money
market securities.

     An investment in the funds is neither insured nor guaranteed by the FDIC or
any other government agency. Yields will fluctuate,  and although the funds seek
to preserve the value of your investment at $1 per share, it is possible to lose
money by investing in the funds.

COMPARATIVE INDICES

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

     The 90-DAY  TREASURY BILL INDEX is derived from secondary  market  interest
rates published by the Federal Reserve Bank.

LIPPER RANKINGS

     LIPPER INC. is an independent mutual fund ranking service that groups funds
according to their investment objectives. Rankings are based on average annual
returns for each fund in a given category for the periods indicated. Rankings
are not included for periods less than one year.

     The Lipper  categories for the U.S.  Treasury and  government  money market
funds are:

     U.S.  TREASURY  MONEY MARKET  FUNDS  (Capital  Preservation)  -- funds with
dollar-weighted  average maturities of less than 90 days that intend to maintain
a  stable  net  asset  value  and  that  invest  principally  in  U.S.  Treasury
obligations.

     U.S.  GOVERNMENT  MONEY  MARKET  FUNDS  (Government  Agency)  -- funds with
dollar-weighted  average maturities of less than 90 days that intend to maintain
a stable net asset value and that invest  principally  in financial  instruments
issued or guaranteed by the U.S. government, its agencies, or instrumentalities

[left margin]

INVESTMENT TEAM LEADERS
  PORTFOLIO MANAGERS
     AMY O'DONNELL
     DENISE TABACCO


22      1-800-345-2021


Glossary
- --------------------------------------------------------------------------------

RETURNS

* 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.

* 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 18-19.

YIELDS

* 7-DAY  CURRENT  YIELD  is  calculated  based  on the  income  generated  by an
investment  in the fund over a seven-day  period and is  expressed  as an annual
percentage rate.

* 7-DAY  EFFECTIVE  YIELD is  calculated  similarly,  although  this  figure  is
slightly  higher than the fund's 7-Day  Current  Yield because of the effects of
compounding.  The 7-Day  Effective  Yield  assumes  that income  earned from the
fund's investments is reinvested and generating additional income.

PORTFOLIO STATISTICS

* NUMBER OF SECURITIES --the number of different  securities held by a fund on a
given date.

*  WEIGHTED  AVERAGE  MATURITY  (WAM)  -- a  measure  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.  The
longer the WAM, the more interest rate  exposure and  sensitivity  the portfolio
has.

* EXPENSE RATIO -- the operating expenses of the fund, expressed as a percentage
of average net assets.  Shareholders pay an annual fee to the investment manager
for  investment  advisory  and  management  services.  The expenses and fees are
deducted from fund income, not from each shareholder account. (See Note 2 in the
Notes to Financial Statements.)

TYPES OF MONEY MARKET SECURITIES

*  FLOATING-RATE  AGENCY  NOTES  (FLOATERS)  -- debt  securities  issued by U.S.
government  agencies  (such as the Federal Home Loan Bank) whose  interest rates
change when a designated  base rate changes.  The base rate is often the federal
funds rate, the 90-day Treasury bill rate, or the London Interbank  Offered Rate
(LIBOR).

* U.S.  GOVERNMENT AGENCY NOTES --  intermediate-term  debt securities issued by
U.S.  government  agencies (such as the Federal Home Loan Bank). These notes are
issued with maturities ranging from three months to 30 years, but the funds only
invest in those with remaining maturities of 13 months or less.

* U.S.  GOVERNMENT AGENCY DISCOUNT NOTES -- short-term debt securities issued by
U.S.  government  agencies (such as the Federal Home Loan Bank). These notes are
issued at a discount and achieve full value at maturity  (typically  one year or
less).

* U.S. TREASURY BILLS (T-BILLS) -- short-term debt securities issued by the U.S.
Treasury  and backed by the direct  "full faith and  credit"  pledge of the U.S.
government.  T-bills are issued with maturities ranging from three months to one
year.


                                                 www.americancentury.com      23


Glossary
- --------------------------------------------------------------------------------
                                                                    (Continued)

* U.S. TREASURY NOTES (T-NOTES) --  intermediate-term  debt securities issued by
the U.S. Treasury and backed by the direct "full faith and credit" pledge of the
U.S.  government.  T-notes are issued  with  maturities  ranging  from two to 10
years, but the funds only invest in those with remaining maturities of 13 months
or less.

OTHER SHORT-TERM INVESTMENTS

* DOLLAR ROLLS -- short-term debt agreements in which a fund buys a security and
agrees to sell it back at a specific price and date (usually within seven days).
The fund actually takes  possession and ownership of the security until the sale
date.

* REPURCHASE  AGREEMENTS  (REPOS) -- short-term  debt agreements in which a fund
buys a security and agrees to sell it back at a specific price and date (usually
within seven days).  The fund does not own the security;  instead,  the security
serves as collateral for the agreement.

FUND CLASSIFICATIONS

INVESTMENT OBJECTIVE

The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

* CAPITAL  PRESERVATION  -- Offers  taxable and tax-free  money market funds for
relative stability of principal and liquidity.

* INCOME -- Offers funds that can provide current income and competitive yields,
as well as a strong and stable  foundation and generally lower volatility levels
than stock funds.

* GROWTH & INCOME --  Offers  funds  that  emphasize  both  growth  and  income,
diversification,  varying  capitalization sizes, and different investment styles
and strategies.

* GROWTH -- Offers  funds with a focus on  capital  appreciation  and  long-term
growth,  generally providing high return potential with corresponding high price
fluctuation risk.

RISK

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that the fund's category may change over time. Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

*  CONSERVATIVE  -- these funds  generally  provide lower return  potential with
either low or minimal price fluctuation risk.

* MODERATE -- these funds  generally  provide  moderate  return  potential  with
moderate price fluctuation risk.

*  AGGRESSIVE  -- these  funds  generally  provide  high return  potential  with
corresponding high price fluctuation risk.


24      1-800-345-2021

[inside back cover]

===============================================================================
INVESTMENT OBJECTIVE - CAPITAL PRESERVATION
===============================================================================

                  RISK LEVEL - CONSERVATIVE

TAXABLE MONEY MARKETS           TAX-FREE MONEY MARKETS

Premium  Capital Reserve        FL Municipal Money Market
Prime Money Market              CA Municipal Money Market
Premium Government Reserve      CA Tax-Free Money Market
Government Agency               Tax-Free Money Market
   Money Market
Capital Preservation

===============================================================================
INVESTMENT OBJECTIVE - INCOME
===============================================================================

                   RISK LEVEL - AGGRESSIVE

TAXABLE BONDS                   TAX-FREE BONDS

Target 2025*                    CA High-Yield Municipal
Target 2020*                    High-Yield Municipal
Target 2015*
Target 2010*
High-Yield
International Bond

                    RISK LEVEL - MODERATE

TAXABLE BONDS                   TAX-FREE BONDS

Long-Term Treasury              CA Long-Term Tax-Free
Target 2005*                    Long-Term Tax-Free
Bond                            CA Insured Tax-Free
Premium Bond

                   RISK LEVEL - CONSERVATIVE

TAXABLE BONDS                   TAX-FREE BONDS

Intermediate-Term Bond          CA Intermediate-Term Tax-Free
Intermediate-Term Treasury      AZ Intermediate-Term Municipal
GNMA                            FL Intermediate-Term Municipal
Inflation-Adjusted Treasury     Intermediate-Term  Tax-Free
Limited-Term Bond               CA Limited-Term  Tax-Free
Target 2000*                    Limited-Term Tax-Free
Short-Term Government
Short-Term Treasury

===============================================================================
INVESTMENT OBJECTIVE - GROWTH AND INCOME
===============================================================================

                     RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY

Small Cap Quantitative
Small Cap Value

                      RISK LEVEL - MODERATE

ASSET ALLOCATION/BALANCED       DOMESTIC EQUITY        SPECIALTY

Strategic Allocation --         Equity Growth          Utilities
   Aggressive                   Equity Index           Real Estate
Balanced                        Tax-Managed Value
Strategic Allocation --         Income & Growth
   Moderate                     Value
Strategic Allocation --         Equity Income
   Conservative

===============================================================================
INVESTMENT OBJECTIVE - GROWTH
===============================================================================

                      RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY                 SPECIALTY              INTERNATIONAL

New Opportunities               Global Gold            Emerging Markets
Giftrust(reg.tm)                                       International Discovery
Vista                                                  International Growth
Heritage                                               Global Growth
Growth
Ultra
Select

                       RISK LEVEL - MODERATE

SPECIALTY

Global Natural Resources


The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that a fund's  category may change over time.  Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

For a definition of fund categories, see the Glossary.

*  While listed within the Income investment objective,  the Target funds do not
   pay current dividend income.  Income dividends are distributed once a year in
   December. The Target funds are listed in all three risk categories due to the
   dramatic  price  volatility  investors may  experience  during certain market
   conditions.  If held  to  their  target  dates,  however,  they  can  offer a
   conservative, dependable way to invest for a specific time horizon.

Please call for a prospectus  or profile on any  American  Century  fund.  These
documents contain important information including charges and expenses,  and you
should read them carefully before you invest or send money.


[back cover]

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

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

WWW.AMERICANCENTURY.COM

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX: 816-340-7962

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

BUSINESS, NOT-FOR-PROFIT, EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-3533

AMERICAN CENTURY GOVERNMENT INCOME TRUST

INVESTMENT MANAGER
AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.
KANSAS CITY, MISSOURI

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 Investments                                      BULK RATE
P.O. Box 419200                                               U.S. POSTAGE PAID
Kansas City, MO 64141-6200                                    AMERICAN CENTURY
www.americancentury.com                                           COMPANIES

9905                                                    Funds Distributor, Inc.
SH-BKT-16268                      (c)1999 American Century Services Corporation
<PAGE>
[front cover]
                                                                 MARCH 31, 1999

ANNUAL REPORT
- -----------------
AMERICAN CENTURY

    [graphic of stairs]

- -----------------------
SHORT-TERM GOVERNMENT

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


[inside front cover]

AMERICAN CENTURY KEEPS WITH TRADITION
- --------------------------------------------------------------------------------

FOLLOWING BENHAM'S FOOTSTEPS

On March 1, we made it easier for you to do business with us. We simplified  our
organizational  structure by  eliminating  the  venerable  Benham and  Twentieth
Century names, and putting all our funds under American Century. The name change
will not affect your funds' investment  management--the proven Benham investment
philosophy, experienced portfolio management teams, and legacy of innovation and
high-quality performance remain.

CONSISTENT,  SOLID  PERFORMANCE--We'll  continue  to  adhere  to the  investment
practices  that have  helped  our  fixed-income  funds  perform so well over the
years. In 1998,  two-thirds of American Century bond funds beat their peer group
average, according to Lipper, Inc.

CONSISTENT  INVESTMENT  PHILOSOPHY--American  Century  fixed-income  funds  will
continue to offer a "pure play" on their sector of the market, as they did under
Benham.

CONTINUITY  OF THE  MANAGEMENT  TEAM--The  investment  process  is not all  that
remains  the same;  we've  retained  our core team of  experienced  fixed-income
portfolio managers.

    *  Experience--The  more than 35 fixed-income  investment  professionals  at
       American  Century have an average of nine years of investment  management
       experience.

    *  Bigger and better--Since  American Century was formed,  we've doubled the
       size  of the  original  Benham  management  team  in our  Mountain  View,
       California office.

TRADITION OF INNOVATION--Like  Benham before it, American Century is a leader in
fixed-income  fund  innovation.  For example,  we introduced a total of four new
fixed-income  funds  in the  last  three  years,  including  the  first  no-load
inflation-adjusted bond fund.

We continue to run our fixed-income operation from our offices in Mountain View,
California, which is also home to our walk-in Investor Center.

We look forward to continuing to meet your fixed-income  investment needs in the
Benham tradition.

WHAT'S NEW . . .

     We now classify our funds in easy-to-remember categories based on objective
and risk. The four  objective  categories  are:  CAPITAL  PRESERVATION,  INCOME,
GROWTH AND INCOME,  and GROWTH.  The three risk  categories  are:  CONSERVATIVE,
MODERATE,  and AGGRESSIVE.  This new  classification  system makes it easier for
investors to identify which funds are right for them.

     Turn to the  inside  back  cover of this  report to see a list of the funds
classified by objective and risk. For  definitions of the fund  categories,  see
the Glossary.

Past performance is no guarantee of future results.

[left margin]

SHORT-TERM GOVERNMENT
(TWUSX)
- -------------


Our Message to You
- --------------------------------------------------------------------------------
/photo of James E. Stowers III and James E. Stowers, Jr./
James E. Stowers III, seated, with James E. Stowers, Jr.

     The U.S.  government bond market  experienced a remarkable  reversal during
the year ended March 31,  1999.  When we last  addressed  you in the  semiannual
report for Short-Term Government, yields had just plunged as investors rushed to
the  relative  safety  and  liquidity  of  short-term  U.S.  bonds,   especially
Treasurys.  Investors  were spooked by global  economic and  financial  turmoil,
which  also  motivated  the  Federal  Reserve  (the  U.S.  central  bank) to cut
short-term  interest rates to bolster a seemingly  vulnerable  U.S.  economy and
help stabilize markets worldwide.

     The Fed's actions  helped turn things  around.  By January  1999,  overseas
economies were  stabilizing,  the U.S.  economy was posting  strong growth,  and
investor  confidence  had  rebounded.  As a result,  investors  sold  short-term
Treasurys in favor of stocks and higher-yielding bonds. Yields rose, though they
still remained significantly lower than they were a year earlier.

     It  was  also  an  exciting  period  at  American  Century.  In  March,  we
consolidated all our funds under the American Century name.  Though we are proud
of the venerable Twentieth Century and Benham names, we believe the change makes
it simpler for you to identify your funds.

     We also  reclassified  all 71 of our funds,  based on investment  goals and
risk levels,  so you can more easily  choose the funds that are right for you. A
complete list of American Century funds, sorted by their new classifications, is
on the inside back cover of this report.

     In   addition,   we've  made  some   enhancements   to  our  Web  site  (at
www.americancentury.com).  Among the new  features  are daily fund  information,
including  return and price data,  market and national  news, and a Forms Center
with access to the most-requested investor forms and applications.  You can also
sign up to receive fund prospectuses and shareholder reports electronically.

     Finally,  here's our latest Year 2000  Readiness  Disclosure.  Our critical
systems have been renovated,  tested, and returned to production. We continue to
test these  systems,  as well as  participate  in  industry-wide  tests with our
business partners.

     As always, we appreciate your continued confidence in American Century.

Sincerely,

/s/James E. Stowers, Jr.                 /s/James E. Stowers III
James E. Stowers, Jr.                    James E. Stowers III
Chairman of the Board and Founder        Chief Executive Officer

[right margin]

                 Table of Contents
   Report Highlights ......................................................    2
   Market Perspective .....................................................    3
SHORT-TERM GOVERNMENT
   Performance Information ................................................    4
   Management Q&A .........................................................    5
   Portfolio at a Glance ..................................................    5
   Portfolio Composition
      by Security Type ....................................................    6
   Schedule of Investments ................................................    8
FINANCIAL STATEMENTS
   Statement of Assets and
      Liabilities .........................................................   12
   Statement of Operations ................................................   13
   Statements of Changes
      in Net Assets .......................................................   14
   Notes to Financial
      Statements ..........................................................   15
   Financial Highlights ...................................................   19
   Report of Independent
      Accountants .........................................................   21
OTHER INFORMATION
   Share Class and Retirement
      Account Information .................................................   22
   Background Information
      Investment Philosophy
         and Policies .....................................................   23
      Comparative Indices .................................................   23
      Lipper Rankings .....................................................   23
      Investment Team
         Leaders ..........................................................   23
    Glossary ..............................................................   24


                                                  www.americancentury.com      1


Report Highlights
- --------------------------------------------------------------------------------

MARKET PERSPECTIVE

*   Short-term  U.S.  government  bonds posted solid  returns for the year ended
    March 31, 1999, despite severe market volatility.

*   Bonds  rallied  during the late summer and early fall of 1998 in response to
    global  economic and financial  turmoil that spooked  investors into seeking
    safe haven in U.S. Treasury securities.

*   Global instability  prompted the Federal Reserve,  the U.S. central bank, to
    cut short-term interest rates for the first time in three years.

*   Treasury  yields plunged and prices soared.  Other  government bond sectors,
    such as agency and mortgage-backed securities, lagged due to weaker demand.

*   The  Fed's  actions  helped  stabilize  world  financial  markets,  restored
    investor confidence, and triggered a rebound by the U.S. stock market.

*   As the global economy strengthened and investors regained  confidence,  they
    began to switch out of  Treasurys  and back into stocks and  higher-yielding
    bonds.

*   Agency and mortgage-backed  securities  benefited from the switch during the
    first quarter of 1999, while Treasurys suffered.


MANAGEMENT Q&A

*   Short-Term  Government  provided an above-average  return for the year ended
    March 31, 1999 (according to Lipper Inc.).

*   Below-average  expenses and an above-average exposure to mortgage-backed and
    agency securities boosted the fund's returns.

*   Short-Term  Government  increased  its  mortgage  position  last  fall  when
    mortgage-backed   securities   offered   attractive   yields  compared  with
    Treasurys.

*   The  investment  team reversed  that  strategy in 1999 when  mortgage-backed
    securities rallied and Treasurys sold off.

*   The  investment  team  made  only  modest  adjustments  to  the  portfolio's
    duration, keeping it within 10% of the fund's benchmark index.

*   The fund's duration is likely to remain neutral to the benchmark,  at around
    1.85 years, in the near term because we believe there's little evidence that
    interest rates are poised to move significantly lower.

*   The bulk of  Short-Term  Government's  assets  are also  likely to remain in
    relatively high-yielding mortgage-backed securities.

[left margin]

           SHORT-TERM GOVERNMENT(1)
                    (TWUSX)
TOTAL RETURNS:                 AS OF 3/31/99
    6 Months                        0.94%(2)
    1 Year                             5.39%
30-DAY SEC YIELD:                      5.07%
INCEPTION DATE:                     12/15/82
NET ASSETS:                $832.4 million(3)

(1)  Investor Class.
(2)  Not annualized.
(3)  Includes Investor and Advisor Classes.

See Total Returns on page 4.
Investment terms are defined in the Glossary on pages 24-25.


2      1-800-345-2021


Market Perspective from Randall W. Merk
- --------------------------------------------------------------------------------
/photo of Randall W. Merk/
Randall W. Merk, chief investment officer of fixed income

SOLID RETURNS

     Short-term  U.S.  government  bonds posted solid returns for the year ended
March 31, 1999. The Salomon Brothers 1- to 3-Year Treasury/Agency Index returned
6.10%,  even though  short-term  bond  prices and yields  gyrated in response to
changing expectations for global economic growth and inflation.

FIRST, A FLIGHT TO QUALITY

     Bond investors began the period worried that strong U.S. economic growth in
1998 might  ignite  inflation  and force  interest  rates  higher.  Those  fears
evaporated when financial and economic  problems in Southeast Asia  intensified.
Instead of  interest  rate  hikes,  investors  factored  in the  possibility  of
interest rate cuts.

     Signs of trouble in Russia and Latin America  intensified the  recessionary
outlook,  which caused  investors  to flock to the safety and  liquidity of U.S.
Treasury securities.  This drove down Treasury yields until October, as shown in
the accompanying  graph.  Furthermore,  to stabilize financial markets and boost
investor  confidence,  the Federal Reserve lowered short-term  interest rates in
September, October, and November-- its first rate cuts in three years.

THEN, A FLIGHT FROM QUALITY

     As a result of the Fed's actions,  continuing U.S. economic  strength,  and
signs  of  recovery  in  some  of  the  troubled  economies  around  the  globe,
expectations  shifted  in late  1998 and early  1999.  Safety  became  less of a
concern to  investors,  while  improved  returns and higher  yields  became more
important.  That  resulted in a shift back to  higher-yielding  bonds.  Treasury
securities  were  hit  hard by this  shift.  Treasury  yields,  as  shown in the
accompanying graph,  bounced back significantly from October 1998 to March 1999,
causing Treasury bond prices to fall.  However,  Treasurys didn't give up all of
their earlier price gains.

WHERE AGENCYS AND  MORTGAGES FIT IN

     With their relatively high yields,  mortgage-backed  and agency  securities
generally  outperformed U.S.  Treasury  securities during much of the spring and
summer of 1998. But that changed when global turmoil prompted  investors to seek
"safe haven" in Treasurys in the early fall.  Investors shunned  mortgage-backed
securities as prices fell due to increased  home-loan  refinancing  activity and
heavy selling by hedge funds.  Agency  securities,  meanwhile,  languished  from
faltering demand.

     However,  with the global  economic crisis  subsiding by early 1999,  fewer
investors required the relative safety and liquidity of Treasurys. Instead, they
sought higher-yielding  fixed-income investments,  including mortgage-backed and
agency  securities.  That shift in sentiment caused  mortgage-backed  and agency
securities to outperform Treasurys during the first three months of 1999.

[right margin]

"SIGNS OF TROUBLE IN RUSSIA AND LATIN AMERICA. . .CAUSED INVESTORS TO FLOCK TO
THE SAFETY AND LIQUIDITY OF U.S. TREASURY SECURITIES. THIS DROVE DOWN TREASURY
YIELDS UNTIL OCTOBER (SEE THE GRAPH BELOW)."

[line graph - data below]

SHIFTING TREASURY YIELD CURVES

                     3/31/98         10/5/98         3/31/99
YEARS TO MATURITY
1                     5.52%           4.35%           4.91%
2                     5.57%           4.06%           5.04%
3                     5.62%           4.13%           5.12%
4                     5.64%           4.22%           5.21%
5                     5.62%           4.07%           5.13%
6                     5.67%           4.08%           5.27%
7                     5.71%           4.09%           5.40%
8                     5.69%           4.08%           5.33%
9                     5.67%           4.07%           5.27%
10                    5.65%           4.07%           5.21%
11                    5.69%           4.18%           5.31%
12                    5.73%           4.30%           5.41%
13                    5.77%           4.42%           5.51%
14                    5.84%           4.54%           5.62%
15                    5.87%           4.65%           5.72%
16                    5.89%           4.69%           5.76%
17                    5.91%           4.74%           5.80%
18                    5.93%           4.79%           5.84%
19                    5.95%           4.84%           5.88%
20                    5.99%           4.88%           5.91%
21                    5.99%           4.89%           5.90%
22                    5.99%           4.91%           5.89%
23                    6.00%           4.93%           5.89%
24                    6.00%           4.95%           5.88%
25                    6.01%           4.97%           5.87%
26                    6.00%           4.92%           5.84%
27                    5.98%           4.87%           5.80%
28                    5.97%           4.82%           5.76%
29                    5.96%           4.77%           5.72%
30                    5.94%           4.71%           5.68%

Source: Bloomberg Financial Markets

"TREASURY YIELDS BOUNCED BACK SIGNIFICANTLY FROM OCTOBER 1998 TO MARCH 1999,
CAUSING TREASURY BOND PRICES TO FALL."


                                                  www.americancentury.com      3


Short-Term Government--Performance
- --------------------------------------------------------------------------------

<TABLE>
TOTAL RETURNS AS OF MARCH 31, 1999
                                     INVESTOR CLASS (INCEPTION 12/15/82)                  ADVISOR CLASS (INCEPTION 7/8/98)
                    SHORT-TERM   SALOMON 1- TO 3-YEAR   SHORT U.S. GOVERNMENT FUNDS(2)   SHORT-TERM   SALOMON 1- TO 3-YEAR
                    GOVERNMENT   TREAS./AGENCY INDEX   AVERAGE RETURN   FUND'S RANKING   GOVERNMENT   TREAS./AGENCY INDEX
<S>                  <C>            <C>               <C>                <C>             <C>              <C>
6 MONTHS(1)            0.94%           1.37%              1.12%               --            0.81%            1.37%
1 YEAR                 5.39%           6.10%              5.21%          35 OUT OF 69        --               --
=======================================================================================================================
AVERAGE ANNUAL RETURNS
=======================================================================================================================
3 YEARS                5.58%           6.30%              5.57%          30 OUT OF 54        --               --
5 YEARS                5.50%           6.18%              5.34%          22 OUT OF 46        --               --
10 YEARS               6.28%           7.27%              6.46%           9 OUT OF 12        --               --
LIFE OF FUND           7.08%           8.16%(3)           7.31%(3)       2 OUT OF 3(3)      3.37%          3.99%(4)
</TABLE>

(1) Returns for periods less than one year are not annualized.

(2) According to Lipper Inc., an independent mutual fund ranking service.

(3) Since  12/31/82,  the date nearest the class's  inception for which data are
    available.

(4) Since  7/31/98,  the date nearest the class's  inception  for which data are
    available.

See  pages  22-24  for  more  information  about  share  classes,  returns,  the
comparative index, and Lipper fund rankings.

[mountain graph - data below]

GROWTH OF $10,000 OVER 10 YEARS
Value on 3/31/99
Salomon 1- to 3-Year
   Treasury/Agency Index     $20,170
Short-Term Government        $18,390

                                                  Salomon 1- to 3-Year
                     Short-Term Government       Treasury/Agency Index
DATE                         VALUE                       VALUE
3/31/89                     $10,000                     $10,000
3/31/90                     $10,856                     $11,042
3/31/91                     $11,905                     $12,275
3/31/92                     $12,965                     $13,426
3/31/93                     $13,908                     $14,559
3/31/94                     $14,072                     $14,947
3/31/95                     $14,598                     $15,598
3/31/96                     $15,628                     $16,792
3/31/97                     $16,361                     $17,689
3/31/98                     $17,450                     $19,011
3/31/99                     $18,390                     $20,170

The graph at left shows the growth of a $10,000  investment  in the fund over 10
years,  while the graph below  shows the fund's  year-by-year  performance.  The
Salomon 1- to 3-Year  Treasury/  Agency Index is provided for comparison in each
graph. Short-Term Government's total returns include operating expenses (such as
transaction  costs and  management  fees) that reduce  returns,  while the total
returns of the index do not.  These  graphs are based on Investor  Class  shares
only;  performance  for  other  classes  will  vary  due to  differences  in fee
structures (see Total Returns table above).  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.

[bar graph - data below]

ONE-YEAR RETURNS OVER 10 YEARS (PERIODS ENDED MARCH 31)
                                        Salomon 1- to 3-Year
              Short-Term Government     Treasury/Agency Index
DATE                 RETURN                    RETURN
3/31/90              8.56%                     10.42%
3/31/91              9.66%                     11.17%
3/31/92              8.91%                      9.37%
3/31/93              7.27%                      8.44%
3/31/94              1.18%                      2.67%
3/31/95              3.74%                      4.35%
3/31/96              7.05%                      7.66%
3/31/97              4.69%                      5.34%
3/31/98              6.66%                      7.47%
3/31/99              5.39%                      6.10%



4      1-800-345-2021


Short-Term Government--Q&A
- --------------------------------------------------------------------------------
/photo of Newlin Rankin/

     An  interview  with  Newlin  Rankin,  a portfolio  manager on the  American
Century government bond investment team.

HOW DID SHORT-TERM GOVERNMENT PERFORM DURING THE YEAR ENDED MARCH 31, 1999?

     The fund provided a total return of 5.39%,* which was better than the 5.21%
average total return of the 69 "Short U.S.  Government  Funds" tracked by Lipper
Inc. (See the previous page for additional performance comparisons.)

WHAT HELPED SHORT-TERM GOVERNMENT OUTPERFORM ITS PEER GROUP?

     Much  of the  fund's  outperformance  can be  attributed  to  below-average
expenses and an above-average exposure to mortgage-backed and agency securities.
Lower expenses mean higher yields and returns for our shareholders, other things
being equal.

     In addition,  the  relatively  high yields offered by  mortgage-backed  and
agency securities provided a return advantage over lower-yielding  Treasurys. In
a  short-maturity  fund  like  this one  that  tends to have  less  share  price
fluctuation than longer-maturity  bond funds, yield is an important  contributor
to returns.

WHAT CHANGES DID YOU MAKE TO THE PORTFOLIO'S ASSET ALLOCATION?

     Most of our modifications were based on whether we felt Treasurys, agencys,
or  mortgages  offered  the best value at a given  point.  By the  beginning  of
October,  we had  increased  our stake in  mortgage-backed  securities to 71% of
assets,  up from 61% six months earlier.  At about the same time, we reduced our
Treasury exposure to 25% of assets, down from 37% last April.

     That change reflected our view that mortgage-backed securities offered very
attractive yields compared with Treasurys.  As Randy Merk outlined in the Market
Perspective on page 3, Treasury  yields dropped sharply last fall thanks to huge
investor  demand for maximum  credit  safety and liquidity in the face of global
economic uncertainty.  Meanwhile, the yields for mortgage-backed securities were
pushed higher by concerns that  homeowners  would refinance to take advantage of
falling  interest  rates.  Some of these  concerns were realized when  long-term
interest rates dove to record lows in October and refinancings surged.

WHY ARE MORTGAGE PREPAYMENTS A SOURCE OF CONCERN?

     Mortgage  refinancings shorten the lives of mortgage-backed  securities and
potentially  force  investors  to reinvest in  lower-yielding  bonds.  For those
reasons,  the yield  difference  between  mortgage and Treasury  securities--the
yield "spread"--nearly doubled. We purchased mortgage-backed securities when the
spread widened.

* All fund returns referenced in this interview are for Investor Class shares.

[right margin]

"MUCH OF THE FUND'S OUTPERFORMANCE CAN BE ATTRIBUTED TO BELOW-AVERAGE EXPENSES
AND AN ABOVE-AVERAGE EXPOSURE TO MORTGAGE-BACKED AND AGENCY SECURITIES."

PORTFOLIO AT A GLANCE
                             3/31/99           3/31/98
NUMBER OF SECURITIES           107               125
WEIGHTED AVERAGE
MATURITY                     2.9 YRS           3.0 YRS
AVERAGE DURATION             1.9 YRS           1.9 YRS
EXPENSE RATIO (FOR
   INVESTOR CLASS)            0.59%            0.59%*

* Annualized.

YIELD AS OF MARCH 31, 1999
                            INVESTOR           ADVISOR
                              CLASS             CLASS
30-DAY SEC YIELD              5.07%             4.81%

Investment terms are defined in the Glossary on pages 24-25.


                                                  www.americancentury.com      5


Short-Term Government--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

     More  recently,  we've  shifted  course  again.  The flight to quality that
boosted  Treasurys in the fall reversed  itself in January.  Rather than safety,
investors  increasingly  wanted  higher  yields.  In  response,  mortgage-backed
securities rallied while Treasurys languished. We took advantage of these market
conditions to sell some  mortgage-backed  securities  at  attractive  prices and
redeploy the proceeds primarily into Treasurys.

     By the end of March,  mortgage-backed  securities  stood at 61% of  assets,
while Treasurys were 34%.

WHAT TYPES OF MORTGAGE-BACKED  SECURITIES DID YOU FAVOR?

     We generally favored  collateralized  mortgage obligations (CMOs). Each CMO
consists of a mortgage  pool split into two or more classes of  securities  with
different yields,  maturities, and cash flow patterns. The advantage of a CMO is
that it allows us to structure the cash flow from the investment,  which is made
up of the interest and principal  payments from the mortgages  that comprise the
security.  CMOs can be structured to generate a fixed- or floating-rate  coupon.
In essence, CMOs make it easier for us to predict the pace at which capital will
be returned to us.

     Within the CMO market,  we generally choose  fixed-rate CMOs that are based
on 30-year  mortgage pools issued by the Federal National  Mortgage  Association
(Fannie Mae) or the Federal Home Loan Mortgage Corp.  (Freddie Mac). The CMOs we
purchase  have shorter  average  lives than  standard  Fannie Mae or Freddie Mac
pass-through  securities,  which make the CMOs well-suited for a short-term U.S.
government  bond fund. In October and November,  when we purchased  them,  these
fixed-rate  CMOs were very  attractive  because  their yields were more than 100
basis  points  (1.00%--a  basis point  equals  0.01%)  higher than the yields of
short-term Treasurys.

WHAT STEPS DID YOU TAKE TO MINIMIZE SHORT-TERM GOVERNMENT'S EXPOSURE TO MORTGAGE
REFINANCINGS?

     Homeowners  who pay  lower  interest  rates on their  mortgages  have  less
incentive  to  refinance.   Therefore,   we  increasingly   sold   higher-coupon
(higher-interest-paying)  mortgage-backed  securities  that had performed  well,
leaving the portfolio with a lower overall average  coupon.  As a result of this
strategy,  the coupon on the average  mortgage pool owned by the fund fell about
28 basis points to 7.38%,  and the fund's average coupon  declined from 6.12% to
around 5.90%.

WHAT CHOICES DID YOU MAKE IN THE TREASURY SECTOR?

     We emphasized older  securities,  known as "off-the-run"  Treasurys.  These
securities   typically  have  slightly   higher   yields--and   more  attractive
prices--than the most recently issued, or "on-the-run," Treasurys.

     Unfortunately,   off-the-run  Treasurys   underperformed  newer  securities
throughout  the  final  months  of 1998.  As global  uncertainty  prompted  more
investors  to buy  Treasurys,  they  flocked  to  the  most  liquid,  on-the-run
securities.  Since the beginning of 1999, however,  off-the-run  securities have
gained some ground on more recently issued Treasurys.

[left margin]

"WE TOOK ADVANTAGE  OF FAVORABLE MARKET CONDITIONS TO SELL SOME MORTGAGE-BACKED
SECURITIES AT ATTRACTIVE PRICES AND REDEPLOYED THE PROCEEDS PRIMARILY  INTO
TREASURYS."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF MARCH 31, 1999
Mortgage-Backed Securities     61%
U.S. Treasury Securities       34%
Temporary Cash Investments      5%

AS OF SEPTEMBER 30, 1998
Mortgage-Backed Securities     71%
U.S. Treasury Securities       25%
U.S. Gov't. Agency
   Securities                   4%

Security types are defined on page 25.


6      1-800-345-2021


Short-Term Government--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

HOW DID YOU MANAGE SHORT-TERM GOVERNMENT'S INTEREST RATE SENSITIVITY?

     We adjusted the portfolio's  duration in response to market  conditions and
our view on where interest rates were headed.

     (Duration is a measure of a bond portfolio's interest rate sensitivity. The
longer the  duration,  the more the share price of a bond fund will rise or fall
when rates change.)

     We attempted to lengthen duration when we thought interest rates might fall
and  shorten it when  interest  rates  appeared  likely to rise.  That said,  we
generally made only modest adjustments to duration,  typically keeping it within
10%  of the  duration  of our  benchmark,  the  Salomon  Brothers  1- to  3-Year
Treasury/Agency Index.

WHAT IS YOUR OUTLOOK FOR INTEREST RATES?

     We think interest  rates will remain  roughly where they are now,  although
they are likely to bounce around a bit in response to the latest  economic news.
The U.S.  economy  remains  strong  despite  economic  weakness  in Asia,  Latin
America,  and Europe. In light of brisk domestic economic growth, we see no need
for the Federal Reserve to lower interest rates to stimulate the economy.

     On the other hand, inflation is nearly non-existent,  so there doesn't seem
to be much evidence to support an interest rate hike either.  Furthermore,  U.S.
interest  rates  remain high  relative to much of the rest of the world.  Higher
U.S.  interest  rates  would  boost the  value of the U.S.  dollar  and  further
destabilize already weak foreign currencies.

     Unless U.S.  economic  growth slows  substantially  or  inflation  picks up
significantly,  we believe interest rates will remain relatively stable,  with a
modest upward bias.

WITH THAT OUTLOOK IN MIND, WHAT'S YOUR STRATEGY GOING FORWARD?

     We're  likely to keep  duration  neutral to the  benchmark,  at around 1.85
years.  That's what we  typically  do when we believe that rates are unlikely to
move  significantly  higher or lower.  But we'll  make  adjustments  if we think
there's a compelling reason for interest rates to make a big move.

     We also plan to maintain the fund's current asset allocation, with the bulk
of assets in relatively high-yielding  mortgage-backed securities.  We'll offset
our mortgage position with Treasurys, which provide the fund with liquidity.

[right margin]

"WE THINK INTEREST RATES WILL REMAIN ROUGHLY WHERE THEY  ARE NOW, ALTHOUGH THEY
ARE LIKELY TO BOUNCE AROUND A BIT IN RESPONSE TO THE LATEST ECONOMIC NEWS."


                                                  www.americancentury.com      7


Short-Term Government--Schedule of Investments
- --------------------------------------------------------------------------------

MARCH 31, 1999

Principal Amount                ($ in Thousands)                    Value
- --------------------------------------------------------------------------------

U.S. TREASURY SECURITIES--34.4%
                 $130,000  U.S. Treasury Notes, 6.25%,
                              10/31/01                             $133,723
                  150,000  U.S. Treasury Notes, 5.25%,
                              1/31/01                               150,691
                                                                 ------------
TOTAL U.S. TREASURY SECURITIES                                      284,414
                                                                 ------------
   (Cost $285,780)

ADJUSTABLE-RATE MORTGAGE SECURITIES(1)--5.6%
FHLMC--1.7%
                    9,896  FHLMC Pool #605188, 7.14%,
                              4/1/18                                 10,158
                      160  FHLMC Pool #635104, 6.75%,
                              8/1/18                                    165
                      383  FHLMC Pool #606095, 7.38%,
                              11/1/18                                   390
                    2,136  FHLMC Pool #755188, 6.92%,
                              9/1/20                                  2,200
                      459  FHLMC Pool #390263, 6.25%,
                              1/1/21                                    463
                       53  FHLMC Pool #775473, 7.36%,
                              6/1/21                                     54
                      722  FHLMC Pool #876559, 7.83%,
                              3/1/24                                    737
                                                                 ------------
                                                                     14,167
                                                                 ------------
FNMA--3.8%
                      325  FNMA Pool #020155, 7.49%,
                              8/1/14                                    332
                       59  FNMA Pool #009781, 7.07%,
                              10/1/14                                    59
                      233  FNMA Pool #025432, 7.00%,
                              4/1/16                                    238
                      234  FNMA Pool #036922, 7.375%,
                              8/1/16                                    240
                      348  FNMA Pool #105843, 7.63%,
                              1/1/17                                    357
                    1,613  FNMA Pool #061401, 7.73%,
                              5/1/17                                  1,695
                      898  FNMA Pool #066415, 7.03%,
                              7/1/17                                    927
                      309  FNMA Pool #061392, 7.36%,
                              7/1/17                                    323
                      223  FNMA Pool #064708, 6.75%,
                              2/1/18                                    231
                      970  FNMA Pool #070030, 6.83%,
                              2/1/18                                    993
                      136  FNMA Pool #162880, 7.33%,
                              5/1/18                                    139
                      250  FNMA Pool #070186, 6.94%,
                              6/1/18                                    259
                      672  FNMA Pool #013786, 7.16%,
                              8/1/18                                    692

Principal Amount                ($ in Thousands)                    Value
- --------------------------------------------------------------------------------

              $       182  FNMA Pool #116473, 7.21%,
                              12/1/18                              $    186
                      547  FNMA Pool #244477, 6.39%,
                              8/1/19                                    562
                    2,792  FNMA Pool #142402, 6.99%,
                              9/1/19                                  2,870
                    1,040  FNMA Pool #070595, 6.57%,
                              1/1/20                                  1,061
                   11,923  FNMA Pool #313611, 6.83%,
                              12/1/20                                12,139
                      430  FNMA Pool #336479, 7.37%,
                              3/1/21                                    442
                      347  FNMA Pool #129482, 6.41%,
                              8/1/21                                    351
                      662  FNMA Pool #145556, 6.50%,
                              1/1/22                                    684
                      435  FNMA Pool #334441, 7.00%,
                              5/1/22                                    443
                    1,011  FNMA Pool #163993, 7.37%,
                              5/1/22                                  1,037
                      427  FNMA Pool #169868, 6.92%,
                              6/1/22                                    436
                      323  FNMA Pool #173165, 6.93%,
                              7/1/22                                    329
                      316  FNMA Pool #178295, 6.78%,
                              9/1/22                                    323
                      188  FNMA Pool #328733, 7.08%,
                              1/1/23                                    193
                      251  FNMA Pool #220498, 7.75%,
                              6/1/23                                    258
                      178  FNMA Pool #222649, 7.77%,
                              7/1/23                                    183
                    1,865  FNMA Pool #303336, 7.21%,
                              8/1/23                                  1,911
                      477  FNMA Pool #190647, 7.33%,
                              8/1/23                                    490
                      357  FNMA Pool #318767, 7.69%,
                              10/1/25                                   366
                       73  FNMA Pool #062836, 6.61%,
                              4/1/26                                     74
                      150  FNMA Pool #062835, 6.39%,
                              1/1/27                                    152
                      144  FNMA Pool #070184, 7.15%,
                              1/1/27                                    150
                      277  FNMA Pool #070716, 6.51%,
                              1/1/29                                    282
                      289  FNMA Pool #091689, 6.62%,
                              2/1/29                                    298
                                                                 ------------
                                                                     31,705
                                                                 ------------
GNMA--0.1%
                      246  GNMA Pool #008872, 6.625%,
                              11/20/21                                  253
                      172  GNMA Pool #008230, 6.875%,
                              5/20/17                                   176

                                              See Notes to Financial Statements


8      1-800-345-2021


Short-Term Government--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

Principal Amount                ($ in Thousands)                    Value
- --------------------------------------------------------------------------------

              $       282  GNMA Pool #008763, 7.375%,
                              2/20/21                              $    288
                        8  GNMA Pool #008902, 6.875%,
                              1/20/22                                     8
                      189  GNMA Pool #008964, 7.125%,
                              8/20/26                                   192
                                                                 ------------
                                                                        917
                                                                 ------------
TOTAL ADJUSTABLE-RATE
MORTGAGE SECURITIES                                                  46,789
                                                                 ------------
   (Cost $47,087)

FIXED-RATE MORTGAGE SECURITIES(1)--4.4%
FHLMC--2.4%
                    6,447  FHLMC Pool #G40164, 6.50%,
                              11/1/02                                 6,561
                    4,836  FHLMC Pool #G10439, 6.50%,
                              1/1/11                                  4,904
                    8,129  FHLMC Pool #E64136, 6.50%,
                              5/1/11                                  8,236
                                                                 ------------
                                                                     19,701
                                                                 ------------
FNMA--1.8%
                    5,556  FNMA Pool #332814, 6.00%,
                              7/1/09                                  5,541
                    9,284  FNMA Pool #356801, 6.00%,
                              12/1/08                                 9,258
                                                                 ------------
                                                                     14,799
                                                                 ------------
GNMA--0.2%
                        3  GNMA Pool #127619, 12.50%,
                              6/15/00                                     3
                       12  GNMA Pool #126325, 11.50%,
                              8/15/00                                    13
                      198  GNMA Pool #001565, 5.50%,
                              1/20/09                                   192
                       70  GNMA Pool #179457, 9.00%,
                              12/20/16                                   75
                       86  GNMA Pool #199973, 9.00%,
                              12/20/16                                   92
                      347  GNMA Pool #220128, 9.00%,
                              8/20/17                                   371
                      135  GNMA Pool #220134, 9.50%,
                              8/20/17                                   144
                       78  GNMA Pool #234860, 9.50%,
                              10/20/17                                   83
                      589  GNMA Pool #001291, 9.50%,
                              11/20/19                                  629
                                                                 ------------
                                                                      1,602
                                                                 ------------
TOTAL FIXED-RATE
MORTGAGE SECURITIES                                                  36,102
                                                                 ------------
   (Cost $35,898)

Principal Amount                ($ in Thousands)                    Value
- --------------------------------------------------------------------------------
COLLATERALIZED MORTGAGE OBLIGATIONS(1)--50.7%
FHLMC--28.0%
               $    3,692  FHLMC REMIC, Series 1516,
                              Class FA, Floater, 5.50%,
                              4/15/99, resets monthly off
                              the 1-month LIBOR plus
                              0.50% with a 0.50% floor and
                              a 8.50% cap, final maturity
                              6/15/00(2)                           $  3,709
                    6,314  FHLMC REMIC, Series 1521,
                              Class FA, Floater,  5.50%,
                              4/15/99, resets monthly
                              off the  1-month  LIBOR
                              plus 0.50% with a 0.50%
                              floor and a 8.50% cap,
                              final maturity 7/15/00(2)               6,335
                    9,393  FHLMC REMIC, Series 1998,
                              Class FG, Floater,
                              5.90%,  4/15/99,  resets
                              monthly off the 1-month
                              LIBOR plus 0.90% with a
                              0.90% floor and 9.00% cap,
                              final maturity
                              10/15/27(2)                             9,415
                    2,494  FHLMC REMIC, Series 1528,
                              Class A, 6.50%, 12/15/00                2,504
                    2,037  FHLMC REMIC, Series 1982,
                              Class BC SEQ, 6.50%,
                              9/15/04                                 2,039
                    8,068  FHLMC REMIC, Series 1451,
                              Class Z PAC-1, 6.75%,
                              7/15/05                                 8,080
                    7,205  FHLMC REMIC, Series 1587,
                              Class EB PAC-1, 5.50%,
                              5/15/07                                 7,215
                    8,749  FHLMC REMIC, Series 1678,
                              Class PE PAC, 5.60%,
                              7/15/07                                 8,767
                   33,088  FHLMC REMIC, Series 2013,
                              Class VA SC, PT, 6.00%,
                              3/15/12                                32,648
                   34,300  FHLMC REMIC, Series 2034,
                              Class PC PAC, 6.00%,
                              11/15/18                               34,417
                    7,922  FHLMC REMIC, Series 1861,
                              Class E SEQ, 6.50%, 8/15/20             7,991
                    7,113  FHLMC REMIC, Series 1934,
                              Class HB SEQ, 6.50%,
                              8/17/21                                 7,170
                   19,835  FHLMC REMIC, Series 1560,
                              Class PY PAC-1, 5.95%,
                              11/15/21                               19,706
                   12,000  FHLMC REMIC, Series 1896,
                              Class C SEQ, 7.00%,
                              11/15/21                               12,133
                    6,177  FHLMC REMIC, Series 1558,
                              Class A TAC, 6.00%, 5/15/22             6,169

See Notes to Financial Statements


                                                  www.americancentury.com      9


Short-Term Government--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)

MARCH 31, 1999

Principal Amount                ($ in Thousands)                    Value
- --------------------------------------------------------------------------------

                  $10,000  FHLMC REMIC, Series 2072,
                              Class PN PAC, 5.75%,
                              7/15/24                              $  9,786
                   25,194  FHLMC REMIC, Series 2129,
                              Class K SEQ, 6.00%, 1/15/26            24,105
                    9,661  FHLMC REMIC, Series 2085,
                              Class PD PAC-1, 6.25%,
                              11/15/26                                9,533
                   19,639  FHLMC REMIC, Series 2078,
                              Class BA SEQ, 6.25%,
                              12/15/27                               19,418
                                                                 ------------
                                                                    231,140
                                                                 ------------
FNMA--22.0%
                    9,284  FNMA REMIC, Series 1993-64,
                              Class FB, Floater,
                              5.24%,  4/26/99,  resets
                              monthly off the 1-month
                              LIBOR plus 0.30% with a
                              0.30% floor and 8.50%
                              cap, final maturity 5/25/00(2)          9,312
                    3,925  FNMA REMIC, Series 1993-64
                              Class F, Floater,  5.84%,
                              4/26/99, resets monthly
                              off the  1-month  LIBOR  plus
                              0.90%  with a 0.90%
                              floor and 9.00% cap, final maturity
                              5/25/00(2)                              3,945
                    5,147  FNMA REMIC, Series 1993-81
                              Class F, Floater,  5.44%,
                              4/26/99,  resets monthly
                              off the  1-month  LIBOR
                              plus 0.50% with a 0.50%
                              floor and a 8.50% cap, final maturity
                              6/25/00(2)                              5,176
                    7,984  FNMA REMIC, Series 1993-88,
                              Class FC, Floater,  5.44%,
                              4/26/99, resets monthly
                              off the  1-month  LIBOR
                              plus 0.50% with a 0.50%
                              floor and a 8.25% cap, final maturity
                              6/25/00(2)                              8,016
                    7,369  FNMA REMIC, Series 1993-169,
                              Class F TAC, Floater, 5.54%,
                              4/26/99, resets monthly off
                              the 1-month LIBOR plus 0.60%
                              with a 0.60% floor and 8.00%
                              cap, final maturity 9/25/00(2)          7,399
                    4,152  FNMA REMIC, Series 1993-172,
                              Class FA, Floater,
                              5.54%,  4/26/99,  resets
                              monthly  off the 1-month
                              LIBOR plus  0.60%  with a
                              0.60%  floor and a 8.00%
                              cap, final maturity
                              9/25/00(2)                              4,180


Principal Amount                ($ in Thousands)                    Value
- --------------------------------------------------------------------------------

              $       618  FNMA REMIC, Series 1997-70,
                              Class FB, Floater, 5.39%,
                              4/19/98, resets monthly off
                              the 1-month LIBOR plus
                              0.45% with a 0.45% floor and
                              a 8.50% cap, final maturity
                              3/18/24(2)                           $    619
                   17,104  FNMA REMIC, Series 1998-39,
                              Class FB, Floater,  5.36%,
                              4/19/98, resets monthly
                              off the  1-month  LIBOR
                              plus 0.40% with a 0.40%
                              floor and a 8.50% cap,
                              final maturity 7/18/28(2)              17,040
                   11,209  FNMA REMIC, Series 1994-7,
                              Class PD PAC-1, 6.05%,
                              7/25/07                                11,256
                    3,029  FNMA REMIC, Series 1996-10,
                              Class A SEQ, 6.50%,
                              11/25/17                                3,034
                    4,216  FNMA REMIC, Series 1996-12,
                              Class A SEQ, 6.50%,
                              12/25/17                                4,240
                    1,335  FNMA REMIC, Series G93-29,
                              Class A SEQ, 6.65%,
                              10/25/18                                1,337
                    8,574  FNMA REMIC, Series 1996-64,
                              Class PB PAC, 6.50%,
                              1/18/19                                 8,663
                   19,000  FNMA REMIC, Series 1993-120,
                              Class G PAC-1, 4.50%,
                              4/25/19                                18,466
                   17,125  FNMA REMIC, Series 1993-116,
                              Class D PAC, 5.75%, 8/25/19            17,093
                   13,838  FNMA REMIC, Series 1997-20,
                              Class E SEQ, 7.00%, 6/17/20            14,174
                   14,000  FNMA REMIC, Series 1998-29,
                              Class AB SEQ, 6.40%,
                              8/20/23                                14,050
                    8,182  FNMA REMIC, Series 1993-162,
                              Class E PAC-2, 6.00%,
                              8/25/23                                 8,086
                   25,725  FNMA REMIC, Series 1996-39,
                              Class C SEQ, 6.00%,
                              12/25/24                               25,443
                                                                 ------------
                                                                    181,529
                                                                 ------------
GNMA--0.7%
                    2,138  GNMA REMIC, Series 1996-15,
                              Class K SEQ, 7.00%, 9/16/06             2,153
                    3,644  GNMA REMIC, Series 1996-15,
                              Class J SEQ, 7.00%, 1/16/07             3,697
                                                                 ------------
                                                                      5,850
                                                                 ------------

                                              See Notes to Financial Statements


10      1-800-345-2021


Short-Term Government--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

Principal Amount                ($ in Thousands)                    Value
- --------------------------------------------------------------------------------
PRIVATE LABEL(3)
              $       100  Dean Witter Trust I Floater,
                              Series I, Class A, Underlying
                              Collateral FHLMC, 5.75%,
                              4/20/99, resets quarterly off
                              the 1-month LIBOR plus
                              0.50% with a 0.50% floor and
                              a 13.00% cap, final maturity
                              4/20/18(2)                          $     100
                                                                 ------------
TOTAL COLLATERALIZED
MORTGAGE OBLIGATIONS                                                418,619
                                                                 ------------
   (Cost $417,320)

Principal Amount                ($ in Thousands)                    Value
- --------------------------------------------------------------------------------
TEMPORARY CASH INVESTMENTS--4.9%
       Repurchase Agreement, Morgan Stanley
              Group, Inc., (U.S. Treasury obligations), in
              a joint trading account at 4.90%, dated
              3/31/99, due 4/1/99 (Delivery value
              $40,637)                                             $ 40,631
                                                                 ------------
   (Cost $40,631)

TOTAL INVESTMENT SECURITIES--100.0%                                $826,555
                                                                 ============
   (Cost $826,716)

NOTES TO SCHEDULE OF INVESTMENTS

FHLMC = Federal Home Loan Mortgage Corporation

FNMA = Federal National Mortgage Association

GNMA = Government National Mortgage Association

LIBOR = London Interbank Offered Rate

resets = The frequency with which a security's coupon changes,  based on current
   market  conditions or an  underlying  index.  The more  frequently a security
   resets,  the less risk the  investor  is  taking  that the  coupon  will vary
   significantly from current market rates.

(1)  Final maturity indicated.  Expected remaining maturity used for purposes of
     calculating the weighted average portfolio maturity.
(2) Interest  reset date is indicated.  Rate shown is effective  March 31, 1999.
(3) Investment in category is less than 0.05% of total investment securities.

- --------------------------------------------------------------------------------
UNDERSTANDING  THE  SCHEDULE  OF  INVESTMENTS--This  schedule  tells  you  which
investments your fund owned on the last day of the reporting period.

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

* the percent and dollar breakdown of each investment category

See Notes to Financial Statements


                                                 www.americancentury.com      11


Statement of Assets and Liabilities
- --------------------------------------------------------------------------------

MARCH 31, 1999

ASSETS                                  (In Thousands, Except Per-Share Amounts)
Investment securities, at value
  (identified cost of $826,716) (Note 3) ..............  $826,555
Cash ..................................................     242
Receivable for investments sold .......................     161
Interest receivable ...................................    7,183
                                                        ------------
                                                          834,141
                                                        ------------

LIABILITIES
Payable for capital shares redeemed ...................      742
Accrued management fees (Note 2) ......................      412
Payable for trustees' fees and expenses ...............       4
Accrued expenses and other liabilities ................       1
Dividends payable .....................................      544
                                                        ------------
                                                            1,703
                                                        ------------
Net Assets ............................................   $832,438
                                                        ============

NET ASSETS CONSIST OF:
Capital (par value and paid-in surplus) ...............   $912,137
Accumulated net realized loss
  from investment transactions ........................   (79,538)
Net unrealized depreciation
  on investments (Note 3) .............................     (161)
                                                        ------------
                                                          $832,438
                                                        ============

Investor Class ($ and shares in full)
Net assets ............................................ $832,343,927
Shares outstanding ....................................  87,890,550
Net asset value per share .............................     $9.47

Advisor Class ($ and shares in full)
Net assets ............................................    $93,636
Shares outstanding ....................................     9,887
Net asset value per share .............................     $9.47

- --------------------------------------------------------------------------------
UNDERSTANDING  THE STATEMENT OF ASSETS AND  LIABILITIES--This  statement details
what the fund owns (assets),  what it owes (liabilities),  and its net assets as
of the last day of the period.  If you subtract  what the fund owes from what it
owns,  you get the fund's net assets.  For each class of shares,  the net assets
divided  by the total  number of  shares  outstanding  gives you the price of an
individual share, or the net asset value per share.

NET ASSETS are also broken down by capital (money invested by shareholders); net
gains earned on investments  but not yet paid to  shareholders  or net losses on
investments (known as realized gains or losses); and finally, gains or losses on
securities  still  owned  by the  fund  (known  as  unrealized  appreciation  or
depreciation).  This  breakdown  tells  you the  value  of net  assets  that are
performance-related,  such as investment  gains or losses,  and the value of net
assets that are not related to performance,  such as shareholder investments and
redemptions.

                                              See Notes to Financial Statements


12      1-800-345-2021


Statement of Operations
- --------------------------------------------------------------------------------

YEAR ENDED MARCH 31, 1999

INVESTMENT INCOME                                        (In Thousands)
Income:
Interest .................................................  $47,250
                                                          -----------
Expenses (Note 2):
Management fees ..........................................   4,822
Trustees' fees and expenses ..............................    27
                                                          -----------
 .........................................................   4,849
                                                          -----------
Net investment income ....................................  42,401
                                                          -----------

REALIZED AND UNREALIZED
GAIN ON INVESTMENTS (NOTE 3)
Net realized gain on investments .........................    586
Change in net unrealized
  depreciation on investments ............................    287
                                                          -----------
Net realized and unrealized
  gain on investments ....................................    873
                                                          -----------
Net Increase in Net Assets
  Resulting from Operations ..............................  $43,274
                                                          ===========

- --------------------------------------------------------------------------------
UNDERSTANDING  THE STATEMENT OF  OPERATIONS--This  statement breaks down how the
fund's  net  assets  changed  during  the  period  as a  result  of  the  fund's
operations.  It tells you how much money the fund made or lost after taking into
account income,  fees and expenses,  and investment gains or losses. It does not
include shareholder transactions and distributions.

Fund OPERATIONS include:

* income earned from investments

* management fees and other expenses

* gains or losses from selling investments (known as realized gains or losses)

* gains or losses on current fund holdings (known as unrealized appreciation or
  depreciation)

See Notes to Financial Statements


                                                 www.americancentury.com      13


Statements of Changes in Net Assets
- --------------------------------------------------------------------------------

YEAR ENDED MARCH 31, 1999, PERIOD ENDED MARCH 31, 1998(1) AND
YEAR ENDED OCTOBER 31, 1997

                                       MARCH 31,      MARCH 31,     OCTOBER 31,
Increase in Net Assets                   1999           1998           1997

OPERATIONS                                         (In Thousands)
Net investment income ...............  $42,401        $14,878         $20,109
Net realized gain on investments ....    586            731            1,053
Change in net unrealized
  appreciation (depreciation)
  on investments ....................    287           (4,232)          699
                                     ------------   ------------   -------------
Net increase in net assets
  resulting from operations .........   43,274         11,377         21,861
                                     ------------   ------------   -------------

DISTRIBUTIONS TO
SHAREHOLDERS From net investment income:
  Investor Class ....................  (42,400)       (14,878)       (20,109)
  Advisor Class .....................     (1)            --             --
                                     ------------   ------------   -------------
Decrease in net assets
  from distributions ................  (42,401)       (14,878)       (20,109)
                                     ------------   ------------   -------------

CAPITAL SHARE
TRANSACTIONS (NOTE 4)
Net increase in net assets from
  capital share transactions ........   23,101        292,633         167,808
                                     ------------   ------------   -------------
Net increase in net assets ..........   23,974        289,132         169,560

NET ASSETS
Beginning of period .................  808,464        519,332         349,772
                                     ------------   ------------   -------------
End of period .......................  $832,438       $808,464       $519,332
                                     ============   ============   =============

(1)  The fund's fiscal year end was changed from October 31 to March 31
     resulting in a five month reporting period.

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF CHANGES IN NET ASSETS--These statements show how
the fund's net assets changed over the past three reporting periods.  It details
how much a fund grew or shrank as a result of:

* operations--a summary of the Statement of Operations from the previous page
  for the most recent period

* distributions--income and gains distributed to shareholders

* share transactions--shareholders' purchases, reinvestments, and redemptions

Net  assets  at the  beginning  of  the  period  plus  the  sum  of  operations,
distributions  to  shareholders  and capital  share  transactions  result in net
assets at the end of the period.

                                              See Notes to Financial Statements


14      1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------

MARCH 31, 1999

1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     ORGANIZATION  -- American  Century  Government  Income Trust (the trust) is
registered under the Investment  Company Act of 1940 as an open-end  diversified
management  investment company.  Short-Term Government Fund (the fund) is one of
the eight funds issued by the trust. The investment  objective of the fund is to
provide investors with a high level of current income, consistent with stability
of  principal.  The fund  intends  to pursue  this  objective  by  investing  in
securities of the U.S.  government  and its agencies.  The fund is authorized to
issue two classes of shares:  the Investor Class and the Advisor Class.  The two
classes of shares differ principally in their respective  shareholder  servicing
and distribution expenses and arrangements.  All shares of the fund represent an
equal pro rata interest in the assets of the class to which such shares  belong,
and have identical voting,  dividend,  liquidation and other rights and the same
terms and conditions, except for class specific expenses and exclusive rights to
vote on matters  affecting only  individual  classes.  Sale of the Advisor Class
commenced on July 8, 1998. The following significant  accounting policies are in
accordance with generally accepted accounting  principles;  these principles may
require the use of estimates by fund management.

     SECURITY  VALUATIONS -- Securities are valued 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 as of the
trade date. 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 accretion of discounts and amortization of premiums.

     REPURCHASE AGREEMENTS -- The fund may enter into repurchase agreements with
institutions that the fund's  investment  manager,  American Century  Investment
Management,  Inc. (ACIM),  has determined are creditworthy  pursuant to criteria
adopted by the Board of Trustees. Each repurchase agreement is recorded at cost.
The fund requires that the collateral,  represented by securities, received in a
repurchase transaction be transferred to the custodian in a manner sufficient to
enable the fund to obtain those  securities  in the event of a default under the
repurchase   agreement.   ACIM  monitors,  on  a  daily  basis,  the  securities
transferred to ensure the value,  including  interest,  of the securities  under
each  repurchase  agreement is equal to or greater than amounts owed to the fund
under each repurchase agreement.

     JOINT  TRADING  ACCOUNT -- Pursuant  to an  Exemptive  Order  issued by the
Securities  and  Exchange  Commission,  the fund,  along with  other  registered
investment  companies  having  management  agreements  with ACIM,  may  transfer
uninvested  cash  balances  into a joint  trading  account.  These  balances are
invested in one or more repurchase agreements that are collateralized by U.S.
Treasury or Agency obligations.

     INCOME TAX  STATUS -- It is the fund's  policy to  distribute  all  taxable
income  and  realized  gains  to  shareholders  and to  otherwise  qualify  as a
regulated  investment  company under  provisions  of the Internal  Revenue Code.
Accordingly, no provision has been made for federal or state income taxes.

     DISTRIBUTIONS TO SHAREHOLDERS -- Distributions  from net investment  income
are declared  daily and  distributed  monthly.  Distributions  from net realized
gains in excess of  available  capital  loss  carryovers  are  declared and paid
annually. As of March 31, 1999, the fund had an accumulated net realized capital
loss carryover of $77,455,021 (expiring in 2001 through 2004), which may be used
to offset future taxable gains.

     The fund has elected to treat  $1,718,863 of net capital losses incurred in
the five month  period  ended March 31,  1999,  as having  been  incurred in the
following fiscal year.

     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  reflect the differing character
of  certain  income  items and net  realized  gains  and  losses  for  financial
statement  and tax purposes  and may result in  reclassification  among  certain
capital accounts.

     ADDITIONAL  INFORMATION  -- Funds  Distributor,  Inc.  (FDI) is the trust's
distributor. Certain officers of FDI are also officers of the trust.


                                                 www.americancentury.com      15


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
2. TRANSACTIONS WITH RELATED PARTIES

     The trust has entered into a Management  Agreement  with ACIM that provides
the fund with  investment  advisory  and  management  services in exchange for a
single,  unified management fee per class. Expenses excluded from this agreement
are brokerage,  taxes, portfolio insurance,  interest,  fees and expenses of the
Trustees  who  are  not  considered  "interested  persons"  as  defined  in  the
Investment  Company  Act of 1940  (including  counsel  fees)  and  extraordinary
expenses.  The fee is  calculated  daily and paid  monthly.  It  consists  of an
Investment  Category  Fee  based on the  average  net  assets  of the funds in a
specific fund's  investment  category and a Complex Fee based on the average net
assets of all the funds managed by ACIM. The rates for the  Investment  Category
fee range from  0.2425% to 0.3600% and the rates for the  Complex Fee  (Investor
Class) range from 0.2900% to 0.3100%.  The Advisor Class is 0.2500% less at each
point  within the Complex  Fee range.  For the year ended  March 31,  1999,  the
effective annual Investor Class management fee was 0.59%.

     The Board of Trustees has adopted the Advisor Class Master Distribution and
Shareholder  Services Plan (the plan),  pursuant to Rule 12b-1 of the Investment
Company  Act of 1940.  The plan  provides  that the fund will pay ACIM an annual
distribution  fee equal to 0.25% and  service  fee equal to 0.25%.  The fees are
computed  daily and paid  monthly  based on the Advisor  Class's  average  daily
closing net assets  during the previous  month.  The  distribution  fee provides
compensation for distribution  expenses incurred by financial  intermediaries in
connection  with  distributing  shares of the Advisor Class  including,  but not
limited to, payments to brokers,  dealers, and financial  institutions that have
entered into sales  agreements  with respect to shares of the fund.  The service
fee provides  compensation for shareholder and administrative  services rendered
by ACIM, its affiliates or independent  third party providers.  Fees incurred by
the fund under the plan during the year ended March 31, 1999, were $113.

     Certain  officers  and  trustees  of the  trust  are also  officers  and/or
directors,  and,  as a  group,  controlling  stockholders  of  American  Century
Companies,  Inc., the parent of the trust's  investment  manager,  ACIM, and the
trust's transfer agent, American Century Services Corporation.

- --------------------------------------------------------------------------------
3. INVESTMENT TRANSACTIONS

     Purchases of U.S.  Government and Agency securities,  excluding  short-term
investments,  totaled  $1,437,034,237.  Sales  of  U.S.  Government  and  Agency
securities, excluding short-term investments, totaled $1,572,507,578.

     As of March 31, 1999, accumulated net unrealized depreciation was $518,638,
based on the aggregate  cost of  investments  for federal income tax purposes of
$827,074,115,  which  consisted of unrealized  appreciation  of  $2,542,084  and
unrealized depreciation of $3,060,722.


16      1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)

MARCH 31, 1999

- --------------------------------------------------------------------------------
4. CAPITAL SHARE TRANSACTIONS

    There are an  unlimited  number of shares  authorized  for the  Investor and
Advisor Classes. Transactions in shares of the fund were as follows:

                                                 SHARES       AMOUNT
INVESTOR CLASS                                      (In Thousands)
Year ended March 31, 1999
Sold ..........................................  18,555      $176,717
Issued in reinvestment of distributions .......  4,159        39,563
Redeemed ...................................... (20,283)     (193,273)
                                               ----------   ----------
Net increase ..................................  2,431        $23,007
                                               ==========   ==========

Period ended March 31, 1998(1)
Sold ..........................................  39,286      $373,778
Issued in reinvestment of distributions .......  1,394        13,212
Redeemed ......................................  (9,950)     (94,357)
                                               ----------   ----------
Net increase ..................................  30,730      $292,633
                                               ==========   ==========

Year ended October 31, 1997
Sold ..........................................  8,836       $ 83,471
Issued in connection with aquisition ..........  23,472       221,479
Issued in reinvestment of distributions .......  2,004        18,929
Redeemed ...................................... (16,523)     (156,071)
                                               ----------   ----------
Net increase ..................................  17,789      $167,808
                                               ==========   ==========

ADVISOR CLASS                                       (In Thousands)
July 8, 1998(2) through March 31, 1999
Sold ..........................................    12          $117
Issued in reinvestment of distributions .......    --            1
Redeemed ......................................    (2)         (24)
                                               ----------   ----------
Net increase ..................................    10          $94
                                               ==========   ==========

(1) The fund's fiscal year end was changed from October 31 to March 31 resulting
    in a five month reporting period.

(2) Commencement of sale of the Advisor Class.


                                                 www.americancentury.com      17


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
5. REORGANIZATION PLAN

     On August 29, 1997 American  Century - Benham  Adjustable  Rate  Government
Securities  Fund (ARM) acquired all of the net assets of the American  Century -
Benham  Short-Term   Government  Fund  (Short-Term),   pursuant  to  a  plan  of
reorganization  approved by the acquired  fund's  shareholders on July 30, 1997.
Short-Term is the surviving fund for the purposes of  maintaining  the financial
statements  and  performance  history  in  the   post-reorganization,   but  was
reorganized as a fund issued by American Century Government Income Trust.

     The  acquisition  was  accomplished  by a tax-free  exchange of  23,128,551
shares of ARM for  23,471,559  shares of  Short-Term,  outstanding on August 29,
1997. The net assets of ARM and Short-Term  immediately  before the acquisitions
were $221,479,030 and $313,992,998, respectively. ARM unrealized appreciation of
$672,533  was  combined  with  that  of   Short-Term.   Immediately   after  the
acquisition, the combined net assets were $535,472,028.

     ARM capital loss carryforwards of approximately  $68,398,906,  are included
in  Short-Term's  financials.  These capital loss  carryforwards  are subject to
limitations on their use under the Internal Revenue Code, as amended.

- --------------------------------------------------------------------------------
6. BANK LOANS

     Effective  December 18,  1998,  the fund,  along with  certain  other funds
managed by ACIM,  entered  into an  unsecured  $570,000,000  bank line of credit
agreement  with  Chase  Manhattan  Bank.  Borrowings  under the  agreement  bear
interest at the Federal  Funds rate plus  0.40%.  The fund may borrow  money for
temporary or emergency  purposes to fund shareholder  redemptions.  The fund did
not borrow from the line during the period  December 18, 1998 through  March 31,
1999.

- --------------------------------------------------------------------------------
7. FUND EVENTS

   The following name change became effective March 1, 1999:

              ==================================================================
               NEW NAME                      FORMER NAME
              ==================================================================

   FUND:       Short-Term Government Fund    American Century - Benham
                                             Short-Term Government Fund


18      1-800-345-2021


<TABLE>
<CAPTION>
Short-Term Government--Financial Highlights
- --------------------------------------------------------------------------------

  FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31 (EXCEPT AS NOTED)

                                                                 Investor Class
                                         1999      1998(1)      1997       1996       1995      1994
PER-SHARE DATA
Net Asset Value,
<S>                                     <C>        <C>         <C>        <C>        <C>        <C>
Beginning of Period ................... $9.46      $9.49       $9.47      $9.51      $9.27      $9.67
                                       --------   --------   ---------   --------   --------  --------
Income From Investment Operations
  Net Investment Income ...............  0.49       0.21        0.52       0.51       0.52      0.40
  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions ...  0.01      (0.03)       0.02      (0.04)      0.24     (0.40)
                                       --------   --------   ---------   --------   --------  --------
  Total From Investment Operations ....  0.50       0.18        0.54       0.47       0.76       --
                                       --------   --------   ---------   --------   --------  --------
Distributions
  From Net Investment Income .......... (0.49)     (0.21)      (0.52)     (0.51)     (0.52)    (0.40)
                                       --------   --------   ---------   --------   --------  --------
Net Asset Value, End of Period ........  $9.47      $9.46       $9.49      $9.47      $9.51     $9.27
                                       ========   ========   =========   ========   ========  ========
  Total Return(2) .....................  5.39%      1.95%       5.86%      5.09%      8.42%     0.07%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .................  0.59%    0.59%(3)      0.68%      0.70%      0.70%     0.81%
Ratio of Net Investment Income
to Average Net Assets .................  5.15%    5.43%(3)      5.53%      5.39%      5.53%     4.17%
Portfolio Turnover Rate ...............  196%        54%       293%(4)     246%       128%      470%
Net Assets, End of Period
(in thousands) ........................$832,344   $808,464    $519,332   $349,772   $391,331  $396,753
</TABLE>

(1)  The  fund's  fiscal  year  end was  changed  from  October  31 to  March 31
     resulting in a five month reporting period.  For years ended prior to 1998,
     the fund's fiscal year end was October 31.
(2)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions, if any. Total returns for periods less than one year are not
     annualized.
(3)  Annualized.
(4)  Purchases,  sales, and the market value of securities for Benham Adjustable
     Rate Government  Securities Fund prior to the merger were excluded from the
     portfolio  turnover  calculation.  See  Note 5 in the  Notes  to  Financial
     Statements

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL HIGHLIGHTS--These  statements itemize current period
activity and  statistics  and provide  comparison  data for the last five fiscal
years (or less, if the class is not five years old).

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income

* income distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

* total return--the overall percentage return of the fund, assuming
  reinvestment of all distributions

* expense ratio--operating expenses as a percentage of average net assets

* net income ratio--net investment income as a percentage of average net assets

* portfolio turnover--the percentage of the portfolio that was replaced during
  the period

See Notes to Financial Statements


                                                 www.americancentury.com      19


Short-Term Government--Financial Highlights
- --------------------------------------------------------------------------------
                                                                    (Continued)
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD INDICATED

                                              Advisor Class
                                                 1999(1)
PER-SHARE DATA
Net Asset Value, Beginning of Period .........   $9.49
                                               ---------
Income From Investment Operations
  Net Investment Income ......................   0.33
  Net Realized and Unrealized Loss
  on Investment Transactions .................  (0.02)
                                               ---------
  Total From Investment Operations ...........   0.31
                                               ---------
Distributions
  From Net Investment Income .................  (0.33)
                                               ---------
Net Asset Value, End of Period ...............   $9.47
                                               =========
  Total Return(2) ............................   3.37%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ........................ 0.84%(3)
Ratio of Net Investment Income
to Average Net Assets ........................ 4.77%(3)
Portfolio Turnover Rate ......................   196%
Net Assets, End of Period
(in thousands) ...............................    $94

(1)  July 8, 1998 (commencement of sale) through March 31, 1999.
(2)  Total return assumes reinvestment of dividends and capital gains
     distributions, if any. Total returns for periods less than one year are
     not annualized.
(3)  Annualized.

                                              See Notes to Financial Statements


20      1-800-345-2021


Report of Independent Accountants
- --------------------------------------------------------------------------------

To the Trustees of the American Century Government Income Trust and Shareholders
of the Short-Term Government Fund:

In our opinion, the accompanying statement of assets and liabilities,  including
the schedule of  investments,  and the related  statements of operations  and of
changes  in net assets  and the  financial  highlights  present  fairly,  in all
material  respects,  the financial  position of the Short-Term  Government  Fund
(formerly the American Century - Benham Short-Term  Government Fund) (one of the
eight funds in the American Century  Government Income Trust hereafter  referred
to as the "Fund") at March 31, 1999,  the results of its operations for the year
then ended,  the  changes in its net assets for the year  ended,  the five month
period  ended March 31, 1998 and the year ended  October 31, 1997 and  financial
highlights  for  each of the  periods  presented  therein,  in  conformity  with
generally accepted accounting  principles.  The financial highlights for each of
the three  years in the period  ended  October  31,  1996 were  audited by other
auditors, whose report dated November 20, 1996, expressed an unqualified opinion
on  those  statements.  These  financial  statements  and  financial  highlights
(hereafter referred to as "financial  statements") are the responsibility of the
Fund's  management;  our  responsibility  is to  express  an  opinion  on  these
financial  statements  based on our  audits.  We  conducted  our audits of these
financial  statements in accordance with generally  accepted auditing  standards
which require that we plan and perform the audit to obtain reasonable  assurance
about whether the financial  statements  are free of material  misstatement.  An
audit includes examining,  on a test basis,  evidence supporting the amounts and
disclosures in the financial  statements,  assessing the  accounting  principles
used and  significant  estimates made by management,  and evaluating the overall
financial  statement  presentation.  We believe that our audits,  which included
confirmation  of  securities  at  March  31,  1999 by  correspondence  with  the
custodian, provide a reasonable basis for the opinion expressed above.

                                                      PricewaterhouseCoopers LLP

Kansas City, Missouri
May 7, 1999


                                                 www.americancentury.com      21


Share Class and Retirement Account Information
- --------------------------------------------------------------------------------

SHARE CLASSES

     Two classes of shares are authorized for sale by the fund: Investor Class
and Advisor Class.

      INVESTOR CLASS  shareholders  do not pay any commissions or other fees for
purchase  of fund shares  directly  from  American  Century.  Investors  who buy
Investor  Class  shares  through  a  broker-dealer  may be  required  to pay the
broker-dealer a transaction fee.

      ADVISOR  CLASS shares are sold through  banks,  broker-dealers,  insurance
companies,  and financial advisors.  Advisor Class shares are subject to a 0.50%
Rule 12b-1  service and  distribution  fee. Half of that fee is available to pay
for recordkeeping and administrative  services, and half is available to pay for
distribution  services provided by the financial  intermediary through which the
Advisor Class shares are purchased. The total expense ratio of the Advisor Class
is 0.25% higher than the total expense ratio of the Investor Class.

     Both  classes  of  shares  represent  a pro rata  interest  in the fund and
generally have the same rights and preferences.

RETIREMENT ACCOUNT INFORMATION

     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 from the date of
receipt  at  American  Century.  Even if you plan to  rollover  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 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 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.


22      1-800-345-2021


Background Information
- --------------------------------------------------------------------------------

INVESTMENT PHILOSOPHY AND POLICIES

     American  Century offers 38 fixed-income  funds,  ranging from money market
portfolios  to long-term  bond funds and including  both taxable and  tax-exempt
funds. Each fund is managed to provide a "pure play" on a specific sector of the
fixed-income market. To ensure adherence to this principle,  the basic structure
of each fund's  portfolio  is tied to a specific  market  index.  Fund  managers
attempt  to add  value by making  modest  portfolio  adjustments  based on their
analysis of  prevailing  market  conditions.  Investment  decisions  are made by
management teams, which meet regularly to discuss market analysis and investment
strategies.

     In addition to these principles, each fund has its own investment policies:

     SHORT-TERM GOVERNMENT seeks to provide interest income by investing in U.S.
government and agency securities. The fund maintains a weighted average maturity
of three years or less. Fund shares are not guaranteed by the  U.S. government.

COMPARATIVE INDICES

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

     The  SALOMON  BROTHERS 1- TO 3-YEAR  TREASURY/AGENCY  INDEX is based on the
price  fluctuations of U.S. Treasury and government agency notes with maturities
of 1-3 years.

LIPPER RANKINGS

     LIPPER INC. is an independent mutual fund ranking service that groups funds
according to their investment  objectives.  Rankings are based on average annual
returns for each fund in a given  category for the periods  indicated.  Rankings
are not included for periods less than one year.

     The Lipper category for Short-Term Government is:

     SHORT U.S.  GOVERNMENT  FUNDS --funds that invest at least 65% of assets in
securities  issued  or  guaranteed  by the  U.S.  government,  its  agencies  or
instrumentalities,  with  dollar-weighted  average maturities of less than three
years.

INVESTMENT TEAM LEADERS
  PORTFOLIO MANAGER
     NEWLIN RANKIN


                                                 www.americancentury.com      23


Glossary
- --------------------------------------------------------------------------------

RETURNS

* 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.

* 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 19-20.

YIELDS

* 30-DAY SEC YIELD  represents net  investment  income earned by the fund over a
30-day period,  expressed as an annual percentage rate based on the fund's share
price at the end of the 30-day  period.  The SEC yield  should be regarded as an
estimate  of the  fund's  rate of  investment  income,  and it may not equal the
fund's  actual  income  distribution  rate,  the income paid to a  shareholder's
account, or the income reported in the fund's financial statements.

PORTFOLIO STATISTICS

* NUMBER OF SECURITIES -- the number of different securities held by the fund on
a given date.

*  WEIGHTED  AVERAGE  MATURITY  (WAM)  -- a  measure  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.  The
longer the WAM, the more interest rate  exposure and  sensitivity  the portfolio
has.

* AVERAGE  DURATION  -- another  measure of the  sensitivity  of a  fixed-income
portfolio to interest rate changes.  Duration is a time-weighted  average of the
interest  and  principal  payments  of the  securities  in a  portfolio.  As the
duration of the portfolio increases,  so does the impact of a change in interest
rates on the value of the portfolio.

* EXPENSE RATIO -- the operating expenses of the fund, expressed as a percentage
of average net assets.  Shareholders pay an annual fee to the investment manager
for  investment  advisory  and  management  services.  The expenses and fees are
deducted from fund income, not from each shareholder account. (See Note 2 in the
Notes to Financial Statements.)

INVESTMENT TERMS

* BASIS POINT -- one  one-hundredth of a percentage point (or 0.01%).  100 basis
points  equal one  percentage  point (or 1%).  Basis  points are used to clearly
describe  interest rate changes.  For example,  if a news report  indicates that
interest  rates  rose  by 1%,  does  that  mean 1% of the  previous  rate or one
percentage  point?  It is more accurate to state that interest rates rose by 100
basis points.

* COUPON -- the stated interest rate of a security.

* 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.
Most "normal"  yield curves start in the lower left corner of the graph and rise
to the upper right corner,  indicating that yields rise as maturities  lengthen.
This   upward   sloping   yield   curve   illustrates   a   normal   risk/return
relationship--more return (yield) for more risk (a longer maturity). Conversely,
a "flat" yield curve provides little or no extra return for taking on more risk.


24      1-800-345-2021


Glossary
- --------------------------------------------------------------------------------
                                                                    (Continued)
SECURITY TYPES

*  MORTGAGE-BACKED  SECURITIES -- debt  securities  that represent  ownership in
pools of mortgage  loans.  Most  mortgage-backed  securities  are  structured as
"pass-throughs"--the monthly payments of principal and interest on the mortgages
in the pool are  collected by the bank that is servicing  the  mortgages and are
"passed through" to investors.  While the payments of principal and interest are
considered  secure (many are backed by government agency  guarantees),  the cash
flow is less certain than in other fixed-income investments.  Mortgages that are
paid off early reduce future interest payments from the pool.

* U.S. GOVERNMENT AGENCY SECURITIES -- debt securities issued by U.S. government
agencies  (such as the Federal Home Loan Bank and the Federal Farm Credit Bank).
Some  agency  securities  are  backed by the full  faith and  credit of the U.S.
government,  while others are guaranteed only by the issuing agency.  Government
agency  securities  include  discount  notes  (maturing in one year or less) and
medium-term notes, debentures, and bonds (maturing in three months to 50 years).

* U.S.  TREASURY  SECURITIES -- debt securities  issued by the U.S. Treasury and
backed by the direct  "full  faith and  credit"  pledge of the U.S.  government.
Treasury  securities  include  bills  (maturing  in one  year  or  less),  notes
(maturing in two to 10 years), and bonds (maturing in more than 10 years).

FUND CLASSIFICATIONS

INVESTMENT OBJECTIVE

The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

* CAPITAL  PRESERVATION  -- Offers  taxable and tax-free  money market funds for
relative stability of principal and liquidity.

* INCOME -- Offers funds that can provide current income and competitive yields,
as well as a strong and stable  foundation and generally lower volatility levels
than stock funds.

* GROWTH & INCOME --  Offers  funds  that  emphasize  both  growth  and  income,
diversification,  varying  capitalization sizes, and different investment styles
and strategies.

* GROWTH -- Offers  funds with a focus on  capital  appreciation  and  long-term
growth,  generally providing high return potential with corresponding high price
fluctuation risk.

RISK

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that the fund's category may change over time. Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing, to ensure its objectives,  policies and risk potential are consistent
with your needs.

*  CONSERVATIVE  -- these funds  generally  provide lower return  potential with
either low or minimal price fluctuation risk.

* MODERATE -- these funds  generally  provide  moderate  return  potential  with
moderate price fluctuation risk.

*  AGGRESSIVE  -- these  funds  generally  provide  high return  potential  with
corresponding high price fluctuation risk.


                                                 www.americancentury.com      25


Notes
- --------------------------------------------------------------------------------


26      1-800-345-2021


Notes
- --------------------------------------------------------------------------------


                                                 www.americancentury.com      27


Notes
- --------------------------------------------------------------------------------


28      1-800-345-2021


[inside back cover]

===============================================================================
INVESTMENT OBJECTIVE - CAPITAL PRESERVATION
===============================================================================

                  RISK LEVEL - CONSERVATIVE

TAXABLE MONEY MARKETS           TAX-FREE MONEY MARKETS

Premium  Capital Reserve        FL Municipal Money Market
Prime Money Market              CA Municipal Money Market
Premium Government Reserve      CA Tax-Free Money Market
Government Agency               Tax-Free Money Market
   Money Market
Capital Preservation

===============================================================================
INVESTMENT OBJECTIVE - INCOME
===============================================================================

                   RISK LEVEL - AGGRESSIVE

TAXABLE BONDS                   TAX-FREE BONDS

Target 2025*                    CA High-Yield Municipal
Target 2020*                    High-Yield Municipal
Target 2015*
Target 2010*
High-Yield
International Bond

                    RISK LEVEL - MODERATE

TAXABLE BONDS                   TAX-FREE BONDS

Long-Term Treasury              CA Long-Term Tax-Free
Target 2005*                    Long-Term Tax-Free
Bond                            CA Insured Tax-Free
Premium Bond

                   RISK LEVEL - CONSERVATIVE

TAXABLE BONDS                   TAX-FREE BONDS

Intermediate-Term Bond          CA Intermediate-Term Tax-Free
Intermediate-Term Treasury      AZ Intermediate-Term Municipal
GNMA                            FL Intermediate-Term Municipal
Inflation-Adjusted Treasury     Intermediate-Term  Tax-Free
Limited-Term Bond               CA Limited-Term  Tax-Free
Target 2000*                    Limited-Term Tax-Free
Short-Term Government
Short-Term Treasury

===============================================================================
INVESTMENT OBJECTIVE - GROWTH AND INCOME
===============================================================================

                     RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY

Small Cap Quantitative
Small Cap Value

                      RISK LEVEL - MODERATE

ASSET ALLOCATION/BALANCED       DOMESTIC EQUITY        SPECIALTY

Strategic Allocation --         Equity Growth          Utilities
   Aggressive                   Equity Index           Real Estate
Balanced                        Tax-Managed Value
Strategic Allocation --         Income & Growth
   Moderate                     Value
Strategic Allocation --         Equity Income
   Conservative

===============================================================================
INVESTMENT OBJECTIVE - GROWTH
===============================================================================

                      RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY                 SPECIALTY              INTERNATIONAL

New Opportunities               Global Gold            Emerging Markets
Giftrust(reg.tm)                                       International Discovery
Vista                                                  International Growth
Heritage                                               Global Growth
Growth
Ultra
Select

                       RISK LEVEL - MODERATE

SPECIALTY

Global Natural Resources


The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that a fund's  category may change over time.  Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

For a definition of fund categories, see the Glossary.

*  While listed within the Income investment objective,  the Target funds do not
   pay current dividend income.  Income dividends are distributed once a year in
   December. The Target funds are listed in all three risk categories due to the
   dramatic  price  volatility  investors may  experience  during certain market
   conditions.  If held  to  their  target  dates,  however,  they  can  offer a
   conservative, dependable way to invest for a specific time horizon.

Please call for a prospectus  or profile on any  American  Century  fund.  These
documents contain important information including charges and expenses,  and you
should read them carefully before you invest or send money.


[back cover]

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

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

WWW.AMERICANCENTURY.COM

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX: 816-340-7962

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

BUSINESS, NOT-FOR-PROFIT, EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-3533

AMERICAN CENTURY GOVERNMENT INCOME TRUST

INVESTMENT MANAGER
AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.
KANSAS CITY, MISSOURI

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 Investments                                      BULK RATE
P.O. Box 419200                                               U.S. POSTAGE PAID
Kansas City, MO 64141-6200                                    AMERICAN CENTURY
www.americancentury.com                                           COMPANIES

9905                                                    Funds Distributor, Inc.
SH-BKT-16270                      (c)1999 American Century Services Corporation
<PAGE>
[front cover]
                                                                 MARCH 31, 1999

ANNUAL REPORT
- -----------------
AMERICAN CENTURY

    [graphic of stairs]

- --------------------
GNMA

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


[inside front cover]

AMERICAN CENTURY KEEPS WITH TRADITION
- --------------------------------------------------------------------------------

FOLLOWING BENHAM'S FOOTSTEPS

On March 1, we made it easier for you to do business with us. We simplified  our
organizational  structure by  eliminating  the  venerable  Benham and  Twentieth
Century names, and putting all our funds under American Century. The name change
will not affect your funds' investment  management--the proven Benham investment
philosophy, experienced portfolio management teams, and legacy of innovation and
high-quality performance remain.

CONSISTENT,  SOLID  PERFORMANCE--We'll  continue  to  adhere  to the  investment
practices  that have  helped  our  fixed-income  funds  perform so well over the
years. In 1998,  two-thirds of American Century bond funds beat their peer group
average, according to Lipper, Inc.

CONSISTENT  INVESTMENT  PHILOSOPHY--American  Century  fixed-income  funds  will
continue to offer a "pure play" on their sector of the market, as they did under
Benham.

CONTINUITY  OF THE  MANAGEMENT  TEAM--The  investment  process  is not all  that
remains  the same;  we've  retained  our core team of  experienced  fixed-income
portfolio managers.

    *  Experience--The  more than 35 fixed-income  investment  professionals  at
       American  Century have an average of nine years of investment  management
       experience.

    *  Bigger and better--Since  American Century was formed,  we've doubled the
       size  of the  original  Benham  management  team  in our  Mountain  View,
       California office.

TRADITION OF INNOVATION--Like  Benham before it, American Century is a leader in
fixed-income  fund  innovation.  For example,  we introduced a total of four new
fixed-income  funds  in the  last  three  years,  including  the  first  no-load
inflation-adjusted bond fund.

We continue to run our fixed-income operation from our offices in Mountain View,
California, which is also home to our walk-in Investor Center.

We look forward to continuing to meet your fixed-income  investment needs in the
Benham tradition.

WHAT'S NEW . . .

     We now classify our funds in easy-to-remember categories based on objective
and risk. The four  objective  categories  are:  CAPITAL  PRESERVATION,  INCOME,
GROWTH AND INCOME,  and GROWTH.  The three risk  categories  are:  CONSERVATIVE,
MODERATE,  and AGGRESSIVE.  This new  classification  system makes it easier for
investors to identify which funds are right for them.

     Turn to the  inside  back  cover of this  report to see a list of the funds
classified by objective and risk. For  definitions of the fund  categories,  see
the Glossary.

Past performance is no guarantee of future results.

[left margin]

GNMA
(BGNMX)
- -------------


Our Message to You
- --------------------------------------------------------------------------------
/photo of James E. Stowers III and James E. Stowers, Jr./
James E. Stowers III, seated, with James E. Stowers, Jr.

     During  the year  ended  March 31,  1999,  the bond  market  experienced  a
remarkable reversal. When we last addressed you in the semiannual report for the
GNMA  fund,  yields  had just  plunged  as  investors  rushed to the  safety and
liquidity of U.S. Treasury bonds.  Investors were spooked by global economic and
financial  turmoil,  which also motivated the Federal Reserve (the U.S.  central
bank) to cut short-term interest rates to bolster a seemingly vulnerable U.S.
economy and help stabilize markets worldwide.

     The Fed's actions and the U.S.  economy's  unexpected  strength helped turn
things  around--by  January of 1999,  overseas  economies were  stabilizing  and
investor confidence had rebounded. As a result, investors moved out of Treasurys
into stocks and higher-yielding  bonds. Yields returned to higher levels, though
they still remained significantly lower than they were a year earlier.

     American  Century  GNMA's  management  team worked hard to produce  healthy
returns and maintain the fund's yield in that difficult environment. We're proud
to report they  succeeded--GNMA had above-average  yields and returns (according
to Lipper Inc.) during the past year, as well as over longer time periods.

     It  was  also  an  exciting  period  at  American  Century.  In  March,  we
consolidated all our funds under the American Century name.  Though we are proud
of the venerable Twentieth Century and Benham names, we believe the change makes
it simpler for you to identify your funds.

     We also reclassified all 71 of our funds based on investment goals and risk
levels,  so you can more  easily  choose  the funds  that are  right for you.  A
complete list of American Century funds,  arranged by their new classifications,
is on the inside back cover of this report.

     In addition,  we've made some  enhancements to our Web site.  Among the new
features are daily fund information, including return and price data, market and
national  news,  and a Forms Center with access to the  most-requested  investor
forms and  applications.  You can also sign up to  electronically  receive  fund
prospectuses and shareholder reports.

     Finally,  here's our latest Year 2000  Readiness  Disclosure.  Our critical
systems have been renovated,  tested, and returned to production. We continue to
test these  systems,  as well as  participate  in  industry-wide  tests with our
business partners.

     As always, we appreciate your continued confidence in American Century.


Sincerely,

/s/James E. Stowers, Jr.                 /s/James E. Stowers III
James E. Stowers, Jr.                    James E. Stowers III
Chairman of the Board and Founder        Chief Executive Officer

[right margin]

                 Table of Contents
   Report Highlights ......................................................    2
   Market Perspective .....................................................    3
GNMA
   Performance Information ................................................    4
   Management Q&A .........................................................    5
   Portfolio at a Glance ..................................................    5
   Portfolio Composition
      by Security Type ....................................................    6
   Portfolio Composition
      by GNMA Coupon ......................................................    7
   Schedule of Investments ................................................    8
FINANCIAL STATEMENTS
   Statement of Assets and
      Liabilities .........................................................   10
   Statement of Operations ................................................   11
   Statements of Changes
      in Net Assets .......................................................   12
   Notes to Financial
      Statements ..........................................................   13
   Financial Highlights ...................................................   16
   Report of Independent
      Accountants .........................................................   18
OTHER INFORMATION
   Share Class and Retirement
      Account Information .................................................   19
   Background Information
      Investment Philosophy
         and Policies .....................................................   20
      Comparative Indices .................................................   20
      Lipper Rankings .....................................................   20
      Investment Team
         Leaders ..........................................................   20
    Glossary ..............................................................   21


                                                  www.americancentury.com      1


Report Highlights
- --------------------------------------------------------------------------------

MARKET PERSPECTIVE

*   GNMA securities  produced  positive  returns  despite extreme  interest rate
    volatility. For the twelve months ended March 31, 1999, the Salomon Brothers
    30-Year GNMA Index returned 6.29%.

*   Rates  fell  in  1998  because  financial  crises  overseas  sent  investors
    scrambling for the safety and liquidity of U.S. Treasury bonds. In addition,
    the Federal  Reserve (the Fed) lowered  interest  rates to boost the economy
    and restore investor confidence in the financial markets.

*   Rapid U.S.  economic growth and more stable markets overseas caused rates to
    rebound in late 1998 and early 1999,  though bond yields finished the twelve
    months lower overall.

*   GNMA securities  underperformed  Treasury bonds in 1998 as falling  interest
    rates caused a record number of mortgage refinancings.  Mortgage prepayments
    remove older, higher-yielding securities from the market and leave investors
    with cash to invest at new, lower rates.

*   Mortgages  outperformed  Treasurys  in the  first  quarter  of 1999 when the
    economic situation stabilized and investors began to sell Treasury bonds and
    buy higher-yielding securities.

MANAGEMENT Q&A

*   The portfolio  continued to produce  higher  returns and more current income
    than the average GNMA fund, according to Lipper Inc.

*   American  Century GNMA was upgraded by  Morningstar  from four to five stars
    (see page 5 for a more complete discussion of the fund's rating).

*   The portfolio  closely tracked its benchmark for the fiscal year ended March
    31, 1999. We think our benchmark-based management approach and below-average
    expenses are key reasons for GNMA's long-term success.

*   We tried to reduce the fund's  exposure to  prepayments  by cutting back our
    holdings of mortgages with coupons above 8%.

*   As a substitute  for these  premium  mortgages,  we held a small  portion of
    assets in Treasury and government agency inflation-indexed securities.

*   The portfolio's duration changed with interest rates--prepayments caused the
    duration to decrease when rates were low, while duration  increased as rates
    rose. GNMA's duration on March 31 was 3.2 years.

*   We expect bond yields to remain in a relatively narrow range for the rest of
    the year, which would be positive for mortgages.  Mortgage-backed securities
    tend to perform best when rates are stable--that's  when their higher yields
    contribute most to total return.

[left margin]

"THE PORTFOLIO CONTINUED TO PRODUCE HIGHER RETURNS AND MORE CURRENT INCOME THAN
THE AVERAGE GNMA FUND, ACCORDING TO LIPPER INC."

                GNMA(1)
                (BGNMX)
TOTAL RETURNS:             AS OF 3/31/99
    6 Months                    1.68%(2)
    1 Year                         5.66%
30-DAY SEC YIELD:                  6.14%
INCEPTION DATE:                  9/23/85
NET ASSETS:              $1.4 billion(3)

(1)  Investor Class.
(2)  Not annualized.
(3)  Includes Investor and Advisor Classes.

See Total Returns on page 4.
Investment terms are defined in the Glossary on pages 21-22.


2      1-800-345-2021


Market Perspective from Randall W. Merk
- --------------------------------------------------------------------------------
/photo of Randall W. Merk/
Randall W. Merk, chief investment officer of fixed income

POSITIVE PERFORMANCE

     Despite sharp interest rate volatility during the twelve months ended March
31, 1999, GNMA securities  performed  reasonably well. For the year, the Salomon
Brothers 30-Year GNMA Index returned 6.29%. By comparison,  the Salomon Brothers
3- to 10-Year Treasury Index returned 7.10%.

INTEREST RATE VOLATILITY

     Rates plummeted in 1998 because financial crises in Asia, Russia, and Latin
America  threatened  U.S.  economic  growth and kept  inflation low. The Federal
Reserve,  the U.S. central bank, lowered interest rates three times in late 1998
to prop up the economy and restore investor confidence in the financial markets.
In addition, investors nervous about global economic turmoil piled into Treasury
bonds, a traditional  "safe-haven"  investment.  These factors  combined to send
Treasury yields to 30-year lows in October.

     With rates so low,  mortgage  refinancings  surged.  The  Mortgage  Bankers
Association  Index of Refinancing  Applications--considered  the best measure of
refinancing activity--reached a record high in October as interest rates tumbled
(see the graph at right).

     Mortgage prepayments are undesirable for GNMA investors because they remove
older, higher-yielding securities from the market, leaving investors excess cash
to reinvest at lower rates.  The record number of refinancings and falling rates
caused mortgage-backed  securities to underperform Treasurys in 1998. Because of
that  performance  disparity,  the  spread,  or  difference  in  yield,  between
Treasurys and GNMA securities hit a 12-year high in October.

     The  higher  yields  offered  by  mortgage-backed  securities  relative  to
Treasury  bonds  attracted  many  investors  to GNMA  certificates  in the first
quarter of 1999.  Meanwhile,  the U.S. economy continued to grow rapidly despite
the slowdown  overseas,  and higher oil prices led to concerns about  inflation.
That caused interest rates to move higher in early 1999, which slowed prepayment
activity. As a result, GNMA securities rebounded, outperforming Treasurys in the
first quarter of 1999.

REFINANCINGS LOWER GNMA YIELDS

     Though GNMAs offered attractive yields relative to Treasurys, one result of
the record mortgage  refinancing wave was to reduce the absolute level of yields
on available GNMA securities. By the end of 1998, just 5% of GNMA securities had
double-digit  interest  coupons.  Many of those  higher-yielding  mortgages were
refinanced  into loans paying  6.5-7.0%,  which now make up more than 40% of the
GNMA market.

     The  increasing   concentration  of  the   mortgage-backed   market  around
securities  with  relatively low coupons has made the GNMA market more volatile.
Lower-coupon  GNMAs tend to be more  responsive to changes in interest rates, so
the price  volatility  in the  mortgage-backed  market  will  increase  as rates
fluctuate.

[right margin]

"DESPITE SHARP INTEREST RATE VOLATILITY DURING THE TWELVE MONTHS ENDED MARCH
31, 1999, GNMA SECURITIES PERFORMED REASONABLY WELL."

[line chart - data below]

RECORD MORTGAGE REFINANCING WAVE

                Mortgage Bankers Association
                          Index of                   10-Year
                  Refinancing Applications       Treasury Yields
                       (right scale)              (left scale)
4/3/98                    1206.30                    5.474%
4/10/98                   1515.80                    5.578%
4/17/98                   1087.00                    5.587%
4/24/98                   1157.00                    5.660%
5/1/98                    1326.50                    5.658%
5/8/98                    1297.00                    5.705%
5/15/98                   1138.70                    5.683%
5/22/98                   1049.00                    5.633%
5/29/98                    939.40                    5.554%
6/5/98                    1120.70                    5.579%
6/12/98                   1209.60                    5.431%
6/19/98                   1406.20                    5.467%
6/26/98                   1202.00                    5.457%
7/3/98                    1176.50                    5.407%
7/10/98                   1305.50                    5.411%
7/17/98                   1292.20                    5.505%
7/24/98                   1320.20                    5.453%
7/31/98                   1278.80                    5.496%
8/7/98                    1291.90                    5.401%
8/14/98                   1310.50                    5.424%
8/21/98                   1211.90                    5.300%
8/28/98                   1331.50                    5.066%
9/4/98                    1924.00                    5.005%
9/11/98                   1713.50                    4.838%
9/18/98                   2269.90                    4.703%
9/25/98                   2682.70                    4.570%
10/2/98                   3410.50                    4.284%
10/9/98                   4389.10                    4.782%
10/16/98                  2256.30                    4.438%
10/23/98                  2774.30                    4.693%
10/30/98                  2495.70                    4.605%
11/6/98                   1987.00                    4.844%
11/13/98                  1550.70                    4.814%
11/20/98                  1814.80                    4.814%
11/27/98                  1460.40                    4.810%
12/4/98                   2055.10                    4.627%
12/11/98                  1879.10                    4.619%
12/18/98                  1569.00                    4.581%
12/25/98                   864.80                    4.856%
1/1/99                     881.10                    4.648%
1/8/99                    1494.20                    4.870%
1/15/99                   1634.40                    4.657%
1/22/99                   1415.00                    4.637%
1/29/99                   1741.70                    4.653%
2/5/99                    1654.00                    4.938%
2/12/99                   1401.40                    5.059%
2/19/99                   1191.80                    5.067%
2/26/99                   1512.80                    5.285%
3/5/99                    1241.30                    5.307%
3/12/99                   1153.30                    5.151%
3/19/99                   1332.60                    5.164%
3/26/99                   1177.20                    5.199%

Source: Bloomberg Financial Markets


                                                  www.americancentury.com      3


GNMA--Performance
- --------------------------------------------------------------------------------

<TABLE>
TOTAL RETURNS AS OF MARCH 31, 1999

                                INVESTOR CLASS (INCEPTION 9/23/85)               ADVISOR CLASS (INCEPTION 10/9/97)
                              SALOMON 30-YEAR          GNMA FUNDS(2)                         SALOMON 30-YEAR
                      GNMA      GNMA INDEX     AVERAGE RETURN   FUND'S RANKING       GNMA        GNMA INDEX
<S>                  <C>        <C>          <C>             <C>                    <C>           <C>
6 MONTHS(1)           1.68%        1.96%           0.84%             --              1.46%         1.96%
1 YEAR                5.66%        6.29%           5.39%        21 OUT OF 51         5.40%         6.29%
===============================================================================================================
AVERAGE ANNUAL RETURNS
===============================================================================================================
3 YEARS               7.21%        7.69%           6.91%        14 OUT OF 46          --            --
5 YEARS               7.45%        8.01%           7.07%        11 OUT OF 34          --            --
10 YEARS              8.70%        9.27%           8.25%         4 OUT OF 23          --            --
LIFE OF FUND          8.60%        9.48%(3)        8.16%(4)      4 OUT OF 14(4)      5.94%         6.48%(5)
</TABLE>

(1) Returns for periods less than one year are not annualized.

(2) According to Lipper Inc., an independent mutual fund ranking service.

(3) Since  9/30/85,  the date nearest the class's  inception  for which data are
    available.

(4) Since  10/31/85,  the date nearest the class's  inception for which data are
    available.

(5) Since  10/31/97,  the date nearest the class's  inception for which data are
    available.

See  pages  19-21  for  more  information  about  share  classes,  returns,  the
comparative index, and Lipper fund rankings.

[mountain graph - data below]

GROWTH OF $10,000 OVER 10 YEARS
Value on 3/31/99
Salomon 30-Year GNMA Index     $23,271
GNMA                           $23,031

                                      Salomon 30-Year
                      GNMA              GNMA Index
DATE                  VALUE                VALUE
3/31/89              $10,000              $10,000
3/31/90              $11,273              $11,422
3/31/91              $12,757              $13,031
3/31/92              $14,267              $14,608
3/31/93              $15,876              $16,272
3/31/94              $16,083              $16,501
3/31/95              $16,972              $17,523
3/31/96              $18,683              $19,426
3/31/97              $19,779              $20,586
3/31/98              $21,799              $22,823
3/31/99              $23,031              $23,271

$10,000 investment made 3/31/89

The graph at left shows the growth of a $10,000  investment  in the fund over 10
years,  while the graph below  shows the fund's  year-by-year  performance.  The
Salomon  30-Year GNMA Index is provided  for  comparison  in each graph.  GNMA's
total  returns  include  operating  expenses  (such  as  transaction  costs  and
management  fees) that reduce  returns,  while the total returns of the index do
not. The graphs are based on Investor Class shares only;  performance  for other
classes will vary due to differences  in fee  structures  (see the Total Returns
table above).  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.

[bar graph - data below]

ONE-YEAR RETURNS OVER 10 YEARS (PERIODS ENDED MARCH 31)

                                   Salomon 30-Year
                    GNMA             GNMA Index
DATE               RETURN              RETURN
3/31/90            12.73%              14.22%
3/31/91            13.16%              14.09%
3/31/92            11.84%              12.10%
3/31/93            11.28%              11.39%
3/31/94             1.30%               1.41%
3/31/95             5.53%               6.19%
3/31/96            10.08%              10.86%
3/31/97             5.87%               5.97%
3/31/98            10.21%              10.87%
3/31/99             5.66%               6.29%


4      1-800-345-2021


GNMA--Q&A
- --------------------------------------------------------------------------------
/photo of Casey Colton/

     An  interview  with  Casey  Colton,  a  portfolio  manager on the GNMA fund
investment team.

HOW DID THE FUND PERFORM FOR THE FISCAL YEAR ENDED MARCH 31, 1999?

     American  Century GNMA performed  relatively well. For the fiscal year, the
portfolio  returned  5.66%,*  compared with the 5.39%  average  return of the 51
"GNMA  Funds"  tracked by Lipper  Inc.  For the six months  ended March 31, GNMA
returned  1.68%,  doubling the 0.84% average return of the Lipper group.  Before
deducting  expenses,  the fund's  performance  also closely  tracked that of its
benchmark, the Salomon Brothers 30-Year GNMA Index. (See the Total Returns table
on the previous page for detailed performance comparisons.)

     In addition,  the portfolio provided  shareholders with more current income
than the average GNMA fund,  according to Lipper.  On March 31, American Century
GNMA had a 30-day SEC yield of 6.14%,  which  compares very  favorably  with the
5.56% average yield of the Lipper group.

     However,  even though the portfolio's yield is better than average,  it has
been declining. That's because a record number of mortgage refinancings has left
the GNMA market heavily  concentrated in lower-coupon  mortgages (see page 3 for
more details).

IS THE PORTFOLIO'S  SOLID  PERFORMANCE  WHY MORNINGSTAR  UPGRADED GNMA'S OVERALL
RATING IN THE LAST YEAR FROM FOUR TO FIVE STARS, ITS HIGHEST RATING?

     Yes. We manage  American  Century GNMA to try to deliver  strong  long-term
returns  without any unwanted  surprises.  At its best, this means we're able to
give shareholders high current income with little price  fluctuation.  When that
strategy  works,  it has the  potential to be rewarded by  Morningstar's  rating
system, which evaluates fund performance based on relative risk and return.

     Specifically,  the Morningstar  Rating(tm) is calculated  based on a fund's
3-, 5-, and 10-year  average  annual  returns  above and beyond  returns for the
90-day  Treasury bill. In addition,  they make  adjustments  for fees and a risk
factor that reflects  performance  below 90-day T-bill returns.  Only 10% of the
funds in a category  receive five stars;  22.5% receive four stars;  and 35% get
three stars, while the rest get only one or two stars. These ratings are subject
to change every month.

     American Century GNMA carries five-star ratings for the 3-, 5-, and 10-year
periods.  The portfolio was rated against 1521, 1048, and 371 taxable bond funds
for the 3-, 5-, and 10-year  periods  ended March 31, 1999.  We're proud of that
track  record,  but of  course,  shareholders  should  keep  in mind  that  past
performance can't guarantee future results.

* All fund returns referenced in this interview are for Investor Class shares.

[right margin]

"THE PORTFOLIO PROVIDED SHAREHOLDERS WITH MORE CURRENT INCOME THAN THE AVERAGE
GNMA FUND, ACCORDING TO LIPPER."

PORTFOLIO AT A GLANCE
                              3/31/99           3/31/98
NUMBER OF SECURITIES           3,383             3,247
AVERAGE DURATION              3.2 YRS           2.6 YRS
AVERAGE LIFE                  6.5 YRS           5.8 YRS
EXPENSE RATIO (FOR
   INVESTOR CLASS)             0.59%             0.58%

YIELD AS OF MARCH 31, 1999
                             INVESTOR           ADVISOR
                               CLASS             CLASS
30-DAY SEC YIELD               6.14%             5.89%

Investment terms are defined in the Glossary on pages 21-22.


                                                  www.americancentury.com      5


GNMA--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHAT'S BEHIND THE FUND'S SOLID LONG-TERM PERFORMANCE?

     We think the key is our benchmark-based  approach.  We manage the portfolio
against  the  Salomon  Brothers  30-Year  GNMA  Index,  which  tracks the entire
universe  of  outstanding  GNMA-backed  mortgages.  The index  has  historically
outperformed most GNMA funds, so trying to meet or exceed the benchmark's return
has helped the portfolio produce very solid long-term results.

     Another reason for American  Century GNMA's strong relative  performance is
that our expenses are below  average.  Other things being equal,  lower expenses
mean higher yields and returns for our shareholders.

WHAT CHANGES DID YOU MAKE TO THE PORTFOLIO  RELATIVE TO THE  BENCHMARK  OVER THE
LAST SEVERAL MONTHS?

     In terms of coupon structure, we cut back the fund's holdings in securities
with interest coupons above 8%.  Underweighting  these  higher-coupon  mortgages
relative  to the index  helped  reduce  our  exposure  to  prepayments.  We also
underweighted the portfolio relative to the index in GNMAs with interest coupons
below 7%. Those adjustments resulted in a portfolio  relatively  concentrated in
mortgage-backed  securities with 7.0-7.5%  coupons (see the graph on page 7). In
addition,  American Century GNMA's duration  lengthened--in the last six months,
the portfolio's  duration went from 1.5 to 3.2 years,  mirroring  changes in the
benchmark's duration.

CAN YOU  EXPLAIN  DURATION  AND WHY  IT'S  SUCH AN  IMPORTANT  CONCEPT  FOR GNMA
INVESTORS?

     Duration  measures  a bond or bond  portfolio's  sensitivity  to changes in
interest rates.  The longer the duration,  the more you gain in price when rates
fall,  and the more you lose when rates rise.  A shorter  duration  means a bond
portfolio's share price fluctuates less when rates change. So, ideally, you want
to lengthen  duration when interest rates are falling and shorten  duration when
rates are rising.

     But  mortgage-backed   securities  are  different  than  most  bonds--their
duration  decreases when rates decline because mortgage holders  refinance their
loans,  shortening the security's life.  Investors call this effect  "prepayment
risk," and it largely explains why  mortgage-backed  securities lagged Treasurys
in 1998--GNMA  durations  shortened,  providing smaller  incremental returns for
each drop in interest rates.

     On the other hand, while rapidly rising interest rates reduce  prepayments,
higher rates also cause GNMA durations to extend,  which hurts fund performance.
Higher-yielding  mortgage-backed  securities  tend to perform best when interest
rates are relatively stable.  That's because yield is a more important part of a
bond fund's total return when rates are little changed.

[left margin]

"WE MANAGE AMERICAN CENTURY GNMA TO  TRY TO DELIVER STRONG LONG-TERM RETURNS
WITHOUT ANY UNWANTED SURPRISES. AT ITS BEST,  THIS MEANS WE'RE ABLE TO GIVE
SHAREHOLDERS HIGH CURRENT INCOME WITH LITTLE PRICE FLUCTUATION."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF MARCH 31, 1999
GNMAs                      93%
U.S. Gov't. Agency
   Securities               3%
Repos                       2%
U.S. Treasury Securities    2%

AS OF SEPTEMBER 30, 1998
GNMAs                      88%
Repos                       5%
U.S. Gov't. Agency
   Securities               4%
U.S. Treasury Securities    3%

Security types are defined on pages 21-22.


6      1-800-345-2021


GNMA--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHAT DID YOU DO TO MANAGE THE FUND'S EXPOSURE TO PREPAYMENTS?

     While we  invest  primarily  in  mortgages,  we  continued  to hold a small
portion  of assets  (around 5% or so) in  longer-term  Treasury  and  government
agency  inflation-indexed  securities.  They proved to be a good  substitute for
higher-coupon  mortgages  because the inflation rate plus the securities'  fixed
coupons  exceeded the nominal rate we could have  received on a  mortgage-backed
bond,  and we avoided  excess cash caused by  prepayments.  We continued to hold
these  securities  in early  1999  because  they  gave some  protection  against
inflation, which began to creep up along with energy prices.

HOW DO INFLATION-INDEXED SECURITIES WORK?

     Returns for an inflation-indexed security are generated from the security's
coupon plus the inflation rate, and any  appreciation  on the principal  amount.
Inflation-indexed  bonds have a lower interest rate than nominal Treasury bonds,
but whereas the principal  value of nominal bonds remains fixed  throughout  the
life of the bond,  the principal  value of  inflation-indexed  bonds is adjusted
regularly  for  changes  in  inflation.  Interest  payments  are  based  on  the
inflation-adjusted  principal  value, so the amount of interest paid out changes
with the principal adjustments.

WHAT DO YOU SEE FOR THE MARKET OVER THE NEXT SIX MONTHS?

     We expect  interest rates to remain fairly stable for the rest of the year.
That's because  inflation remains  relatively  subdued despite higher oil prices
and rapid U.S. economic growth.  In addition,  the financial and economic crises
overseas  that led to such big  interest  rate  changes  in 1998  appear to have
subsided.

     Relatively  stable  interest  rates would be positive  for  mortgage-backed
securities  because  they would lead to fewer  prepayments.  Slower  refinancing
activity  would ease the pressure on the fund's yield,  which  declined in 1998.
Another  positive  for GNMAs is that they have  attractive  yields  relative  to
Treasury  securities.  That should help boost demand for GNMA certificates going
forward.

GIVEN THAT OUTLOOK, WHAT ARE YOUR PLANS FOR THE FUND?

     We're going to adhere to the same  strategy  that's helped the portfolio to
such  solid  long-term  performance--tracking  the  index  while  making  modest
adjustments  to try and add  value  on the  margin.  We'll  likely  continue  to
underweight  higher-coupon  mortgages until we see prepayment activity decrease.
If  refinancings  do slow  considerably,  we'd consider moving back to a neutral
position in these premium mortgages.

     In the meantime, we'll continue to hold a modest stake in inflation-indexed
securities,  which are attractive substitutes for higher-coupon  mortgage-backed
securities. We'll also try to maintain a neutral duration relative to the index,
giving investors the interest rate sensitivity of the broader GNMA market.

"WE EXPECT INTEREST RATES TO REMAIN IN A NARROW RANGE FOR THE REST OF THE YEAR.
 . . . RELATIVELY STABLE INTEREST RATES WOULD BE POSITIVE FOR MORTGAGE-BACKED
SECURITIES."

[bar graph - data below]

PORTFOLIO COMPOSITION BY GNMA COUPON
                        Percentage of Portfolio
GNMA Coupons             3/31/99       9/30/98
Less than 7%                22%          10%
7%-8%                       51%          54%
8%-9%                       18%          25%
9%-10%                       8%          10%
Greater than 10%             1%           1%


                                                  www.americancentury.com      7


GNMA--Schedule of Investments
- --------------------------------------------------------------------------------

MARCH 31, 1999

Principal Amount                                                       Value
- --------------------------------------------------------------------------------
U.S. TREASURY SECURITIES--1.6%
            $  21,000,000    U.S. Treasury Bonds, 6.125%,
                                11/15/27                          $   21,825,821
                                                                 ---------------
   (Cost $21,774,318)

U.S. GOVERNMENT AGENCY SECURITIES--2.7%
               40,000,000    TVA Inflation Indexed Notes,
                                3.375%, 1/15/07                       38,832,805
                                                                 ---------------
   (Cost $39,395,588)

GNMA SECURITIES(1)--90.5%
               60,690,287    GNMA, 6.00%, 7/20/16 to
                                1/15/29(2)                            59,000,540
              221,773,275    GNMA, 6.50%, 9/20/08 to
                                3/15/29(2)                           221,129,154
              356,031,705    GNMA, 7.00%, 9/15/08 to
                                2/15/29(2)                           361,993,729
               10,391,814    GNMA, 7.25%, 7/20/20 to
                                12/20/25                              10,580,341
              255,844,624    GNMA, 7.50%, 1/15/06 to
                                1/15/28(2)                           263,879,605
                5,756,159    GNMA, 7.65%, 6/15/16 to
                                2/15/18                                6,041,878
                9,380,697    GNMA, 7.75%, 9/20/17 to
                                1/20/26                                9,706,959
                4,861,306    GNMA, 7.77%, 4/15/20 to
                                1/15/21                                5,066,863
                2,986,314    GNMA, 7.85%, 11/20/20 to
                                10/20/22                               3,089,560
                1,269,455    GNMA, 7.89%, 9/20/22(2)                   1,313,359
                3,250,597    GNMA, 7.98%, 6/15/19(2)                   3,418,103
               92,509,537    GNMA, 8.00%, 6/15/06 to
                                2/20/28(2)                            96,377,337
                1,533,493    GNMA, 8.15%, 11/15/19 to
                                2/15/21                                1,615,665
               18,902,535    GNMA, 8.25%, 2/15/06 to
                                5/15/27(2)                            19,839,483
                6,614,519    GNMA, 8.35%, 1/15/19 to
                                12/15/20                               7,003,630
               79,005,756    GNMA, 8.50%, 12/15/04 to
                                5/15/31(2)                            83,384,268
                1,796,567    GNMA, 8.625%, 1/15/32(2)                  1,932,797
               11,534,438    GNMA, 8.75%, 2/15/16 to
                                7/15/27(2)                            12,264,523
               59,902,106    GNMA, 9.00%, 11/15/04 to
                                7/20/26(2)                            64,240,593
               10,208,928    GNMA, 9.25%, 5/15/16 to
                                8/15/26(2)                            10,937,799

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

            $  18,171,504    GNMA, 9.50%, 6/15/09 to
                                7/20/25(2)                        $   19,430,222
                3,014,153    GNMA, 9.75%, 6/15/05 to
                                11/15/21                               3,234,656
                2,930,026    GNMA, 10.00%, 11/15/09 to
                                2/20/22(2)                             3,213,469
                1,981,819    GNMA, 10.25%, 5/15/12 to
                                2/15/21(2)                             2,158,540
                  910,997    GNMA, 10.50%, 8/15/00 to
                                3/15/21                                1,013,440
                  439,002    GNMA, 10.75%, 12/15/09 to
                                7/15/19                                  488,379
                1,832,943    GNMA, 11.00%, 12/15/09 to
                                8/15/20                                2,040,399
                   34,289    GNMA, 11.25%, 10/20/15 to
                                2/20/16                                   38,118
                  439,263    GNMA, 11.50%, 8/15/00 to
                                2/20/20                                  490,208
                  322,726    GNMA, 12.00%, 6/15/00 to
                                1/20/15                                  358,002
                  332,491    GNMA, 12.25%, 8/15/13 to
                                7/15/15                                  377,214
                  542,347    GNMA, 12.50%, 11/15/99 to
                                10/15/15                                 617,135
                   41,321    GNMA, 12.75%, 11/15/13 to
                                6/15/15                                   46,598
                1,190,429    GNMA, 13.00%, 11/15/10 to
                                8/15/15                                1,372,247
                   35,764    GNMA, 13.25%, 1/20/15                        41,573
                  440,443    GNMA, 13.50%, 5/15/10 to
                                11/15/14                                 509,245
                   22,439    GNMA, 13.75%, 8/15/14                        25,693
                   20,192    GNMA, 14.00%, 6/15/11 to
                                10/15/14                                  23,638
                  170,935    GNMA, 14.50%, 9/15/12 to
                                12/15/12                                 201,910
                  387,060    GNMA, 15.00%, 6/15/11 to
                                10/15/12                                 462,023
                  122,297    GNMA, 16.00%, 8/15/10 to
                                4/15/12                                  148,302
                                                                 ---------------
TOTAL GNMA SECURITIES                                              1,279,107,197
                                                                 ---------------
   (Cost $1,261,794,975)

FORWARD COMMITMENTS--2.8%
               25,000,000    GNMA Purchase, 6.50%,
                                settlement 4/22/99                    24,915,050
               15,000,000    GNMA Purchase, 7.00%,
                                settlement 4/22/99                    15,247,845
                                                                 ---------------
TOTAL FORWARD COMMITMENTS                                             40,162,895
                                                                 ---------------
   (Cost $39,958,594)

See Notes to Financial Statements


8      1-800-345-2021


GNMA--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

Principal Amount                                                       Value
- --------------------------------------------------------------------------------
TEMPORARY CASH INVESTMENTS--2.4%

   Repurchase Agreement, Morgan Stanley Group,
    Inc., (U.S. Treasury obligations), in a joint
    trading account at 4.90%, dated 3/31/99,
    due 4/1/99 (Delivery value $33,416,548)                      $    33,412,000
                                                                ----------------

   (Cost $33,412,000)

TOTAL INVESTMENT SECURITIES-100.0%                                $1,413,340,718
                                                                ================
   (Cost $1,396,335,475)

NOTES TO SCHEDULE OF INVESTMENTS

GNMA = Government National Mortgage Association

TVA = Tennessee Valley Authority

(1)  Final maturity indicated.  Expected remaining maturity used for purposes of
     calculating the weighted average portfolio maturity.
(2)  Securities,  or a portion  thereof,  have been  segregated at the custodian
     bank for Forward Commitments.

- --------------------------------------------------------------------------------
UNDERSTANDING  THE  SCHEDULE  OF  INVESTMENTS--This  schedule  tells  you  which
investments your fund owned on the last day of the reporting period.

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

* the percent and dollar breakdown of each investment category

See Notes to Financial Statements


                                                  www.americancentury.com      9


Statement of Assets and Liabilities
- --------------------------------------------------------------------------------

MARCH 31, 1999

ASSETS
Investment securities, at value
  (identified cost of $1,396,335,475)
  (Note 3) ....................................... $1,413,340,718
Cash .............................................    4,574,474
Receivable for investments sold ..................   38,628,543
Interest receivable ..............................    8,838,949
                                                   ---------------
 .................................................  1,465,382,684
                                                   ---------------

LIABILITIES
Payable for investments purchased ................   40,145,104
Payable for capital shares redeemed ..............     884,099
Accrued management fees (Note 2) .................     700,014
Distribution fees payable (Note 2) ...............      1,401
Service fees payable (Note 2) ....................      1,401
Dividends payable ................................    1,127,786
Payable for trustees' fees and expenses ..........      4,930
Accrued expenses and other liabilities ...........      1,228
                                                   ---------------
                                                     42,865,963
                                                   ---------------
Net Assets ....................................... $1,422,516,721
                                                   ===============

NET ASSETS CONSIST OF:
Capital paid in
$1,427,068,233
Accumulated net realized loss on
  investment transactions ........................  (21,556,755)
Net unrealized appreciation on
  investments (Note 3) ...........................   17,005,243
                                                   ---------------
                                                   $1,422,516,721
                                                   ===============

Investor Class
Net assets
 ................................................. $1,415,606,852
Shares outstanding ...............................   133,308,318
Net asset value per share ........................     $10.62

Advisor Class
Net assets .......................................   $6,909,869
Shares outstanding ...............................     650,709
Net asset value per share ........................     $10.62

- --------------------------------------------------------------------------------
UNDERSTANDING  THE STATEMENT OF ASSETS AND  LIABILITIES--This  statement details
what the fund owns (assets),  what it owes (liabilities),  and its net assets as
of the last day of the period.  If you subtract  what the fund owes from what it
owns,  you get the fund's net assets.  For each class of shares,  the net assets
divided  by the total  number of  shares  outstanding  gives you the price of an
individual share, or the net asset value per share.

NET ASSETS are also broken down by capital (money invested by shareholders); net
gains earned on investments  but not yet paid to  shareholders  or net losses on
investments (known as realized gains or losses); and finally, gains or losses on
securities  still  owned  by the  fund  (known  as  unrealized  appreciation  or
depreciation).  This  breakdown  tells  you the  value  of net  assets  that are
performance-related,  such as investment  gains or losses,  and the value of net
assets that are not related to performance,  such as shareholder investments and
redemptions.

                                              See Notes to Financial Statements


10      1-800-345-2021


Statement of Operations
- --------------------------------------------------------------------------------

YEAR ENDED MARCH 31, 1999

INVESTMENT INCOME
Income:
Interest .........................................  $88,813,632
                                                   -------------

Expenses (Note 2):
Management fees ..................................   7,912,933
Distribution fees -- Advisor Class ...............     8,383
Service fees -- Advisor Class ....................     8,383
Trustees' fees and expenses ......................    40,413
                                                   -------------
                                                     7,970,112
                                                   -------------
Net investment income ............................  80,843,520
                                                   -------------

REALIZED AND UNREALIZED
GAIN (LOSS) ON INVESTMENTS
(NOTE 3)
Net realized gain on investments .................   2,433,855
Change in net unrealized
  appreciation on investments ....................  (9,003,273)
                                                   -------------
Net realized and unrealized
  loss on investments ............................  (6,569,418)
                                                   -------------
Net Increase in Net Assets
  Resulting from Operations ......................  $74,274,102
                                                   =============

- --------------------------------------------------------------------------------
UNDERSTANDING  THE STATEMENT OF  OPERATIONS--This  statement breaks down how the
fund's  net  assets  changed  during  the  period  as a  result  of  the  fund's
operations.  It tells you how much money the fund made or lost after taking into
account income,  fees and expenses,  and investment gains or losses. It does not
include shareholder transactions and distributions.

Fund OPERATIONS include:

* income earned from investments

* management fees and other expenses

* gains or losses from selling investments (known as realized gains or losses)

* gains or losses on current fund holdings (known as unrealized appreciation or
  depreciation)

See Notes to Financial Statements


                                                 www.americancentury.com      11


Statements of Changes in Net Assets
- --------------------------------------------------------------------------------

YEARS ENDED MARCH 31, 1999 AND MARCH 31, 1998

Increase in Net Assets                            1999                 1998

OPERATIONS
Net investment income ......................  $80,843,520          $77,799,288
Net realized gain on investments ...........   2,433,855            1,450,246
Change in net unrealized
  appreciation on investments ..............   (9,003,273)         35,274,054
                                            ----------------    ----------------
Net increase in net assets
   resulting from operations ...............   74,274,102          114,523,588
                                            ----------------    ----------------

DISTRIBUTIONS TO SHAREHOLDERS
From net investment income:
  Investor Class ...........................  (80,723,297)        (77,794,647)
  Advisor Class ............................    (192,401)            (4,641)
                                            ----------------    ----------------
Decrease in net assets from
  distributions to shareholders ............  (80,915,698)        (77,799,288)
                                            ----------------    ----------------

CAPITAL SHARE TRANSACTIONS (NOTE 4)
Net increase in net assets from
  capital share transactions ...............  143,057,929          130,210,987
                                            ----------------    ----------------
Net increase in net assets .................  136,416,333          166,935,287

NET ASSETS
Beginning of year .......................... 1,286,100,388        1,119,165,101
                                            ----------------    ----------------
End of year ................................ $1,422,516,721      $1,286,100,388
                                            ================    ================
Undistributed net investment income ........       --                $72,178
                                            ================    ================

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF CHANGES IN NET ASSETS--These statements show how
the fund's net assets  changed over the past two reporting  periods.  It details
how much a fund grew or shrank as a result of:

* operations--a summary of the Statement of Operations from the previous page
  for the most recent period

* distributions--income and gains distributed to shareholders

* share transactions--shareholders' purchases, reinvestments, and redemptions

Net  assets  at the  beginning  of  the  period  plus  the  sum  of  operations,
distributions  to  shareholders  and capital  share  transactions  result in net
assets at the end of the period.

                                              See Notes to Financial Statements


12      1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------

MARCH 31, 1999

1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     ORGANIZATION -- American Century  Government  Income Trust (the trust),  is
registered under the Investment  Company Act of 1940 as an open-end  diversified
management  investment  company.  GNMA Fund (the fund) is one of the eight funds
issued by the trust.  The fund  seeks to provide a high level of current  income
consistent  with safety of principal and  maintenance  of liquidity by investing
primarily in mortgage-backed Ginnie Mae certificates.  The fund is authorized to
issue two classes of shares:  the Investor Class and the Advisor Class.  The two
classes of shares differ principally in their respective  shareholder  servicing
and distribution expenses and arrangements.  All shares of the fund represent an
equal pro rata interest in the assets of the class to which such shares  belong,
and have identical voting,  dividend,  liquidation and other rights and the same
terms and conditions, except for class specific expenses and exclusive rights to
vote on matters  affecting only  individual  classes.  The following  accounting
policies are in accordance with generally accepted accounting principles;  these
principles may require the use of estimates by fund management.

     SECURITY  VALUATIONS -- Securities are valued 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 as of the
trade date. 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 accretion of discounts and amortization of premiums.

     REPURCHASE AGREEMENTS -- The fund may enter into repurchase agreements with
institutions that the fund's  investment  advisor,  American Century  Investment
Management,  Inc. (ACIM),  has determined are creditworthy  pursuant to criteria
adopted by the Board of Trustees. Each repurchase agreement is recorded at cost.
The fund requires that the collateral,  represented by securities, received in a
repurchase  transaction  be  transferred  to the  fund's  custodian  in a manner
sufficient  to enable  the fund to  obtain  those  securities  in the event of a
default under the repurchase  agreement.  ACIM monitors,  on a daily basis,  the
securities  transferred to ensure the value,  including accrued interest, of the
securities  under each repurchase  agreement is greater than amounts owed to the
fund under each repurchase agreement.

     JOINT  TRADING  ACCOUNT -- Pursuant  to an  Exemptive  Order  issued by the
Securities  and  Exchange  Commission,  the fund,  along with  other  registered
investment  companies  having  management  agreements  with ACIM,  may  transfer
uninvested  cash  balances  into a joint  trading  account.  These  balances are
invested in one or more repurchase agreements that are collateralized by U.S.
Treasury or Agency obligations.

     INCOME  TAX  STATUS  -- It is the  fund's  policy  to  distribute  all  net
investment  income  and net  realized  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
income taxes.

     FORWARD  COMMITMENTS  -- The fund may  purchase  and sell  U.S.  government
securities on a firm commitment basis. Under these arrangements, the securities'
prices and  yields  are fixed on the date of the  commitment,  but  payment  and
delivery are scheduled  for a future date.  During this period,  securities  are
subject  to  market   fluctuations.   The  fund  maintains  segregated  accounts
consisting  of cash or liquid  securities  in an amount  sufficient  to meet the
purchase price.

     DISTRIBUTIONS TO SHAREHOLDERS -- Distributions  from net investment  income
are declared daily and paid monthly.  Distributions  from net realized gains are
declared and paid annually.

     At March 31, 1999,  accumulated  net realized  capital loss  carryovers  of
approximately  $20,902,640 (expiring in 2003 through 2005) may be used to offset
future taxable realized gains.

     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  reflect the differing character
of  certain  income  items and net  realized  gains  and  losses  for  financial
statement  and tax purposes  and may result in  reclassification  among  certain
capital accounts.

     ADDITIONAL  INFORMATION  -- Funds  Distributor,  Inc.  (FDI) is the trust's
distributor. Certain officers of FDI are also officers of the trust.


                                                 www.americancentury.com      13


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
2. TRANSACTIONS WITH RELATED PARTIES

     The trust has entered into a Management  Agreement  with ACIM that provides
the fund with  investment  advisory  and  management  services in exchange for a
single,  unified management fee per class.  Expenses excluded from the agreement
are  brokerage  commissions,  taxes,  portfolio  insurance,  interest,  fees and
expenses of the Trustees who are not considered  "interested persons" as defined
in the Investment Company Act of 1940 (including counsel fees) and extraordinary
expenses.  The fee is  calculated  daily and paid  monthly.  It  consists  of an
Investment  Category  Fee  based on the  average  net  assets  of the funds in a
specific fund's  investment  category and a Complex Fee based on the average net
assets of all the funds managed by ACIM. The rates for the  Investment  Category
fee range from  0.2425% to 0.3600% and the rates for the  Complex Fee  (Investor
Class) range from 0.2900% to 0.3100%.  The Advisor Class is 0.2500% less at each
point  within the Complex  Fee range.  For the year ended  March 31,  1999,  the
effective annual Investor Class management fee was 0.59%.

     The Board of Trustees has adopted the Advisor Class Master Distribution and
Shareholder  Services Plan (the plan),  pursuant to Rule 12b-1 of the Investment
Company  Act of 1940.  The plan  provides  that the fund will pay ACIM an annual
distribution  fee equal to 0.25% and  service  fee equal to 0.25%.  The fees are
computed  daily and paid  monthly  based on the Advisor  Class's  average  daily
closing net assets  during the previous  month.  The  distribution  fee provides
compensation for distribution  expenses incurred by financial  intermediaries in
connection  with  distributing  shares of the Advisor Class  including,  but not
limited to, payments to brokers,  dealers, and financial  institutions that have
entered into sales  agreements  with respect to shares of the fund.  The service
fee provides  compensation for shareholder and administrative  services rendered
by ACIM, its affiliates or independent  third party providers.  Fees incurred by
the fund under the plan during the year ended March 31, 1999 were $16,766.

     Certain  officers  and  Trustees  of the  trust  are also  officers  and/or
directors,  and,  as a  group,  controlling  stockholders  of  American  Century
Companies,  Inc., the parent of the trust's  investment  manager,  ACIM, and the
trust's transfer agent, American Century Services Corporation.

- --------------------------------------------------------------------------------
3. INVESTMENT TRANSACTIONS

     Purchases of U.S.  Treasury and Agency  obligations,  excluding  short-term
investments,   totaled  $1,716,693,145.   Sales  of  U.S.  Treasury  and  Agency
obligations, excluding short-term investments, totaled $1,590,418,462.

     As  of  March  31,  1999,  accumulated  net  unrealized   appreciation  was
$16,351,265  based on the aggregate cost of investments  of  $1,396,989,453  for
federal income tax purposes.  Accumulated net unrealized  appreciation consisted
of  unrealized  appreciation  of  $21,510,262  and  unrealized  depreciation  of
$5,158,997.


14      1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
4. CAPITAL SHARE TRANSACTIONS

   Transactions  in  shares  of the fund were as  follows  (unlimited  number of
shares authorized):

                                                   SHARES            AMOUNT
INVESTOR CLASS
Year ended March 31, 1999
Sold ..........................................  53,378,360       $570,181,601
Issued in reinvestment of distributions .......  6,062,643         64,763,962
Redeemed ...................................... (46,668,723)      (498,381,229)
                                               --------------    ---------------
Net increase ..................................  12,772,280       $136,564,334
                                               ==============    ===============

Year ended March 31, 1998
Sold ..........................................  46,751,528       $496,021,137
Issued in reinvestment of distributions .......  5,789,350         61,339,524
Redeemed ...................................... (40,343,016)      (427,609,050)
                                               --------------    ---------------
Net increase ..................................  12,197,862       $129,751,611
                                               --------------    ---------------

ADVISOR CLASS
Year ended March 31, 1999
Sold ..........................................   748,340          $7,995,760
Issued in reinvestment of distributions .......    16,340            174,448
Redeemed ......................................   (157,042)        (1,676,613)
                                               --------------    ---------------
Net increase ..................................   607,638          $6,493,595
                                               ==============    ===============

Period ended March 31, 1998(1)
Sold ..........................................    81,176           $866,914
Issued in reinvestment of distributions .......     408               4,352
Redeemed ......................................   (38,513)          (411,890)
                                               --------------    ---------------
Net increase ..................................    43,071           $459,376
                                               ==============    ===============

(1)  October 9, 1997 (commencement of sale) through March 31, 1998.

- --------------------------------------------------------------------------------
5. BANK LOANS

    Effective  December  18,  1998,  the fund,  along with  certain  other funds
managed by ACIM,  entered  into an  unsecured  $570,000,000  bank line of credit
agreement  with  Chase  Manhattan  Bank.  Borrowings  under the  agreement  bear
interest at the Federal  Funds rate plus  0.40%.  The fund may borrow  money for
temporary or emergency  purposes to fund shareholder  redemptions.  The fund did
not borrow from the line during the period  December 18, 1998 through  March 31,
1999.

- --------------------------------------------------------------------------------
6. FUND EVENTS

  The following name change became effective March 1, 1999:

           =====================================================================
           NEW NAME                      FORMER NAME
           =====================================================================
  FUND:    GNMA Fund                     American Century - Benham GNMA Fund


                                                 www.americancentury.com      15


<TABLE>
<CAPTION>
GNMA--Financial Highlights
- --------------------------------------------------------------------------------

                    FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31

                                                                Investor Class
                                          1999         1998         1997         1996          1995
PER-SHARE DATA
<S>                                      <C>          <C>          <C>          <C>           <C>
Net Asset Value, Beginning of Year ....  $10.67       $10.33       $10.45       $10.18        $10.35
                                       ----------   ----------   ----------   ----------   -----------
Income From Investment Operations
  Net Investment Income ...............   0.64         0.69         0.71         0.74          0.72
  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions ...  (0.05)        0.34        (0.12)        0.27         (0.18)
                                       ----------   ----------   ----------   ----------   -----------
  Total From Investment Operations ....   0.59         1.03         0.59         1.01          0.54
                                       ----------   ----------   ----------   ----------   -----------
Distributions

  From Net Investment Income ..........  (0.64)       (0.69)       (0.71)       (0.74)        (0.71)
                                       ----------   ----------   ----------   ----------   -----------
Net Asset Value, End of Year ..........  $10.62       $10.67       $10.33       $10.45        $10.18
                                       ==========   ==========   ==========   ==========   ===========
  Total Return(1) .....................   5.66%       10.21%        5.84%       10.08%         5.53%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets(2) ..............   0.59%        0.58%        0.55%        0.58%         0.58%
Ratio of Net Investment Income
to Average Net Assets .................   5.98%        6.49%        6.84%        6.98%         7.08%
Portfolio Turnover Rate ...............   119%         133%         105%          64%          120%
Net Assets, End of Year
(in thousands) ........................$1,415,607   $1,285,641   $1,119,165   $1,120,019     $979,670
</TABLE>

(1)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions, if any.
(2)  The ratios  for years  ended  March 31,  1997 and March 31,  1996,  include
     expenses paid through expense offset arrangements.

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL HIGHLIGHTS--These  statements itemize current period
activity and  statistics  and provide  comparison  data for the last five fiscal
years (or less, if the class is not five years old).

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

* total return--the overall percentage return of the fund, assuming reinvestment
  of all distributions

* expense ratio--operating expenses as a percentage of average net assets

* net income ratio--net investment income as a percentage of average net assets

* portfolio turnover--the percentage of the portfolio that was replaced during
  the period

                                              See Notes to Financial Statements


16      1-800-345-2021


GNMA--Financial Highlights
- --------------------------------------------------------------------------------
                                                                    (Continued)

  FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31 (EXCEPT AS NOTED)

                                                    Advisor Class
                                                 1999       1998(1)
PER-SHARE DATA
Net Asset Value, Beginning of Period .......... $10.67      $10.63
                                               ---------   ---------
Income From Investment Operations
  Net Investment Income .......................  0.61        0.31
  Net Realized and Unrealized Gain
  (Loss) on Investment Transactions ........... (0.05)       0.04
                                               ---------   ---------
  Total From Investment Operations ............  0.56        0.35
                                               ---------   ---------
Distributions
  From Net Investment Income .................. (0.61)      (0.31)
                                               ---------   ---------
Net Asset Value, End of Period ................ $10.62      $10.67
                                               =========   =========
  Total Return(2) .............................  5.40%       3.30%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .........................  0.84%     0.84%(3)
Ratio of Net Investment Income
to Average Net Assets .........................  5.73%     5.92%(3)
Portfolio Turnover Rate .......................  119%        133%
Net Assets, End of Period
(in thousands) ................................ $6,910       $460

(1)  October 9, 1997 (commencement of sale) through March 31, 1998.
(2)  Total return assumes reinvestment of dividends and capital gains
     distributions, if any. Total returns for periods less than one
     year are not annualized.
(3)  Annualized.

See Notes to Financial Statements


                                                 www.americancentury.com      17


Report of Independent Accountants
- --------------------------------------------------------------------------------

To the Trustees of the American Century Government Income Trust and Shareholders
of the GNMA Fund:

In our opinion, the accompanying statement of assets and liabilities,  including
the schedule of  investments,  and the related  statements of operations  and of
changes  in net assets  and the  financial  highlights  present  fairly,  in all
material  respects,  the  financial  position  of the GNMA  Fund  (formerly  the
American  Century - Benham  GNMA Fund) (one of the eight  funds in the  American
Century  Government  Income Trust hereafter  referred to as the "Fund") at March
31, 1999, the results of its operations for the year then ended,  the changes in
its net assets  and the  financial  highlights  for each of the two years in the
period then ended, in conformity with generally accepted accounting  principles.
The financial  highlights  for each of the three years in the period ended March
31,  1997 were  audited  by other  auditors,  whose  report  dated May 2,  1997,
expressed an unqualified opinion on those statements. These financial statements
and financial highlights  (hereafter referred to as "financial  statements") are
the responsibility of the Fund's management; our responsibility is to express an
opinion on these  financial  statements  based on our audits.  We conducted  our
audits of these  financial  statements in  accordance  with  generally  accepted
auditing  standards  which  require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the  amounts  and  disclosures  in  the  financial  statements,   assessing  the
accounting  principles  used and significant  estimates made by management,  and
evaluating the overall  financial  statement  presentation.  We believe that our
audits,  which  included  confirmation  of  securities  at  March  31,  1999  by
correspondence  with the custodian and brokers,  provide a reasonable  basis for
the opinion expressed above.

                                                      PricewaterhouseCoopers LLP

Kansas City, Missouri
May 7, 1999


18      1-800-345-2021


Share Class and Retirement Account Information
- --------------------------------------------------------------------------------

SHARE CLASSES

     Two classes of shares are authorized for sale by the fund: Investor Class
and Advisor Class.

      INVESTOR CLASS  shareholders  do not pay any commissions or other fees for
purchase  of fund shares  directly  from  American  Century.  Investors  who buy
Investor  Class  shares  through  a  broker-dealer  may be  required  to pay the
broker-dealer a transaction fee.

      ADVISOR  CLASS shares are sold through  banks,  broker-dealers,  insurance
companies,  and financial advisors.  Advisor Class shares are subject to a 0.50%
Rule 12b-1  service and  distribution  fee. Half of that fee is available to pay
for recordkeeping and administrative  services, and half is available to pay for
distribution  services provided by the financial  intermediary through which the
Advisor Class shares are purchased. The total expense ratio of the Advisor Class
is 0.25% higher than the total expense ratio of the Investor Class.

     Both  classes  of  shares  represent  a pro rata  interest  in the fund and
generally have the same rights and preferences.

RETIREMENT ACCOUNT INFORMATION

     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 from the date of
receipt  at  American  Century.  Even if you plan to  rollover  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 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 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.


                                                 www.americancentury.com      19


Background Information
- --------------------------------------------------------------------------------

INVESTMENT PHILOSOPHY AND POLICIES

     American  Century offers 38 fixed-income  funds,  ranging from money market
portfolios  to long-term  bond funds and including  both taxable and  tax-exempt
funds. Each fund is managed to provide a "pure play" on a specific sector of the
fixed-income market. To ensure adherence to this principle,  the basic structure
of each fund's  portfolio  is tied to a specific  market  index.  Fund  managers
attempt  to add  value by making  modest  portfolio  adjustments  based on their
analysis of  prevailing  market  conditions.  Investment  decisions  are made by
management teams, which meet regularly to discuss market analysis and investment
strategies.

     In addition to these principles, each fund has its own investment policies:

     GNMA  seeks to  provide a high level of  current  income,  consistent  with
safety  of   principal,   by  investing   primarily  in   mortgage-backed   GNMA
certificates. Fund shares are not guaranteed by the U.S. government.

COMPARATIVE INDICES

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

     The SALOMON BROTHERS 30-YEAR GNMA INDEX is a market-capitalization weighted
index of 30-year GNMA single-family mortgages.

LIPPER RANKINGS

     LIPPER INC. is an independent mutual fund ranking service that groups funds
according to their investment  objectives.  Rankings are based on average annual
returns for each fund in a given  category for the periods  indicated.  Rankings
are not included for periods less than one year.

     The Lipper category for GNMA is:

     GNMA  FUNDS--funds  that invest at least 65% of their assets in  Government
National Mortgage Association (Ginnie Mae) securities.

[left margin]

INVESTMENT TEAM LEADERS
  PORTFOLIO MANAGER
     CASEY COLTON


20      1-800-345-2021


Glossary
- --------------------------------------------------------------------------------

RETURNS

* 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.

* 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 16-17.

YIELDS

* 30-DAY SEC YIELD  represents net  investment  income earned by the fund over a
30-day period,  expressed as an annual percentage rate based on the fund's share
price at the end of the 30-day  period.  The SEC yield  should be regarded as an
estimate  of the  fund's  rate of  investment  income,  and it may not equal the
fund's  actual  income  distribution  rate,  the income paid to a  shareholder's
account, or the income reported in the fund's financial statements.

INVESTMENT TERMS

* BASIS POINT -- one  one-hundredth of a percentage point (or 0.01%).  100 basis
points equal one percentage point (or 1%).

* COUPON -- the stated interest rate of a security.

* DURATION EXTENSION -- a lengthening of a mortgage-backed  security's duration,
typically  because of rising interest  rates.  When interest rates rise sharply,
higher interest rates reduce prepayments (which is good for investors),  but the
lower level of prepayments  causes GNMA  durations to extend,  which makes price
declines more severe.

* PREPAYMENT -- paying off a mortgage  early,  often by selling or  refinancing.
Prepayments  occur most frequently when homeowners  refinance their mortgages to
take  advantage  of falling  interest  rates.  Prepayments  shorten the lives of
mortgage  portfolios  and force GNMA  investors  to reinvest  in  lower-yielding
mortgage pools.  Therefore,  when  prepayment  levels climb,  mortgage  analysts
increase the prepayment assumptions used to price mortgage-backed securities. As
a result,  mortgage-backed security durations shorten,  limiting the price gains
from falling interest rates.

PORTFOLIO STATISTICS

* NUMBER OF SECURITIES -- the number of different securities held by a fund on a
given date.

* AVERAGE  DURATION -- a  time-weighted  average of the interest  and  principal
payments  of the  securities  in a  portfolio.  As the  duration  of a portfolio
increases,  so does the impact of a change in interest rates on the value of the
portfolio.

* AVERAGE LIFE -- a measure of the sensitivity of a  mortgage-backed  securities
portfolio to interest rate changes.  Although it is similar to weighted  average
maturity, average life takes into account the gradual payments of principal that
occur with  mortgage-backed  securities.  As a result,  average life is a better
measure of interest rate sensitivity for mortgage-backed securities.

* EXPENSE RATIO -- the operating expenses of the fund, expressed as a percentage
of average net assets.

TYPES OF SECURITIES

* GOVERNMENT NATIONAL MORTGAGE ASSOCIATION SECURITIES (GNMAS) -- mortgage-backed
securities  issued  by the  Government  National  Mortgage  Association,  a U.S.
government agency. A GNMA is backed by a pool of fixed-rate


                                                 www.americancentury.com      21


Glossary
- --------------------------------------------------------------------------------
                                                                    (Continued)

mortgages.  A GNMA is also  backed  by the full  faith  and  credit  of the U.S.
government as to the timely payment of interest and  principal.  This means GNMA
investors will receive their share of interest and principal payments whether or
not borrowers make their scheduled mortgage payments.

* REPURCHASE  AGREEMENTS  (REPOS)  --short-term  debt agreements in which a fund
buys a security  at one price and  simultaneously  agrees to sell it back to the
seller at a slightly  higher  price on a specified  date  (usually  within seven
days).

* U.S. GOVERNMENT AGENCY SECURITIES -- debt securities issued by U.S. government
agencies  (such as the Federal Home Loan Bank and the Federal Farm Credit Bank).
Some  agency  securities  are  backed by the full  faith and  credit of the U.S.
government,  while others are guaranteed only by the issuing agency.  Government
agency  securities  include  discount  notes  (maturing in one year or less) and
medium-term notes, debentures and bonds (maturing in three months to 50 years).

* U.S.  TREASURY  SECURITIES  --debt  securities issued by the U.S. Treasury and
backed by the direct  "full  faith and  credit"  pledge of the U.S.  government.
Treasury  securities  include  bills  (maturing  in one  year  or  less),  notes
(maturing in two to 10 years), and bonds (maturing in more than 10 years).

FUND CLASSIFICATIONS

INVESTMENT OBJECTIVE

The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

* CAPITAL  PRESERVATION  -- Offers  taxable and tax-free  money market funds for
relative stability of principal and liquidity.

* INCOME -- Offers funds that can provide current income and competitive yields,
as well as a strong and stable  foundation and generally lower volatility levels
than stock funds.

* GROWTH & INCOME --  Offers  funds  that  emphasize  both  growth  and  income,
diversification,  varying  capitalization sizes, and different investment styles
and strategies.

* GROWTH -- Offers  funds with a focus on  capital  appreciation  and  long-term
growth,  generally providing high return potential with corresponding high price
fluctuation risk.

RISK

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that the fund's category may change over time. Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

*  CONSERVATIVE  -- these funds  generally  provide lower return  potential with
either low or minimal price fluctuation risk.

* MODERATE -- these funds  generally  provide  moderate  return  potential  with
moderate price fluctuation risk.

*  AGGRESSIVE  -- these  funds  generally  provide  high return  potential  with
corresponding high price fluctuation risk.


22      1-800-345-2021


Notes
- --------------------------------------------------------------------------------


                                                 www.americancentury.com      23


Notes
- --------------------------------------------------------------------------------


24      1-800-345-2021


[inside back cover]

===============================================================================
INVESTMENT OBJECTIVE - CAPITAL PRESERVATION
===============================================================================

                  RISK LEVEL - CONSERVATIVE

TAXABLE MONEY MARKETS           TAX-FREE MONEY MARKETS

Premium  Capital Reserve        FL Municipal Money Market
Prime Money Market              CA Municipal Money Market
Premium Government Reserve      CA Tax-Free Money Market
Government Agency               Tax-Free Money Market
   Money Market
Capital Preservation

===============================================================================
INVESTMENT OBJECTIVE - INCOME
===============================================================================

                   RISK LEVEL - AGGRESSIVE

TAXABLE BONDS                   TAX-FREE BONDS

Target 2025*                    CA High-Yield Municipal
Target 2020*                    High-Yield Municipal
Target 2015*
Target 2010*
High-Yield
International Bond

                    RISK LEVEL - MODERATE

TAXABLE BONDS                   TAX-FREE BONDS

Long-Term Treasury              CA Long-Term Tax-Free
Target 2005*                    Long-Term Tax-Free
Bond                            CA Insured Tax-Free
Premium Bond

                   RISK LEVEL - CONSERVATIVE

TAXABLE BONDS                   TAX-FREE BONDS

Intermediate-Term Bond          CA Intermediate-Term Tax-Free
Intermediate-Term Treasury      AZ Intermediate-Term Municipal
GNMA                            FL Intermediate-Term Municipal
Inflation-Adjusted Treasury     Intermediate-Term  Tax-Free
Limited-Term Bond               CA Limited-Term  Tax-Free
Target 2000*                    Limited-Term Tax-Free
Short-Term Government
Short-Term Treasury

===============================================================================
INVESTMENT OBJECTIVE - GROWTH AND INCOME
===============================================================================

                     RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY

Small Cap Quantitative
Small Cap Value

                      RISK LEVEL - MODERATE

ASSET ALLOCATION/BALANCED       DOMESTIC EQUITY        SPECIALTY

Strategic Allocation --         Equity Growth          Utilities
   Aggressive                   Equity Index           Real Estate
Balanced                        Tax-Managed Value
Strategic Allocation --         Income & Growth
   Moderate                     Value
Strategic Allocation --         Equity Income
   Conservative

===============================================================================
INVESTMENT OBJECTIVE - GROWTH
===============================================================================

                      RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY                 SPECIALTY              INTERNATIONAL

New Opportunities               Global Gold            Emerging Markets
Giftrust(reg.tm)                                       International Discovery
Vista                                                  International Growth
Heritage                                               Global Growth
Growth
Ultra
Select

                       RISK LEVEL - MODERATE

SPECIALTY

Global Natural Resources


The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that a fund's  category may change over time.  Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

For a definition of fund categories, see the Glossary.

*  While listed within the Income investment objective,  the Target funds do not
   pay current dividend income.  Income dividends are distributed once a year in
   December. The Target funds are listed in all three risk categories due to the
   dramatic  price  volatility  investors may  experience  during certain market
   conditions.  If held  to  their  target  dates,  however,  they  can  offer a
   conservative, dependable way to invest for a specific time horizon.

Please call for a prospectus  or profile on any  American  Century  fund.  These
documents contain important information including charges and expenses,  and you
should read them carefully before you invest or send money.


[back cover]

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

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

WWW.AMERICANCENTURY.COM

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX: 816-340-7962

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

BUSINESS, NOT-FOR-PROFIT, EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-3533

AMERICAN CENTURY GOVERNMENT INCOME TRUST

INVESTMENT MANAGER
AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.
KANSAS CITY, MISSOURI

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 Investments                                      BULK RATE
P.O. Box 419200                                               U.S. POSTAGE PAID
Kansas City, MO 64141-6200                                    AMERICAN CENTURY
www.americancentury.com                                           COMPANIES

9905                                                    Funds Distributor, Inc.
SH-BKT-16272                      (c)1999 American Century Services Corporation
<PAGE>
[front cover]
                                                                 MARCH 31, 1999

ANNUAL REPORT
- -----------------
AMERICAN CENTURY

    [graphic of stairs]

- ---------------------------
INFLATION-ADJUSTED TREASURY

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


[inside front cover]

AMERICAN CENTURY KEEPS WITH TRADITION
- --------------------------------------------------------------------------------

FOLLOWING BENHAM'S FOOTSTEPS

On March 1, we made it easier for you to do business with us. We simplified  our
organizational  structure by  eliminating  the  venerable  Benham and  Twentieth
Century names, and putting all our funds under American Century. The name change
will not affect your funds' investment  management--the proven Benham investment
philosophy, experienced portfolio management teams, and legacy of innovation and
high-quality performance remain.

CONSISTENT,  SOLID  PERFORMANCE--We'll  continue  to  adhere  to the  investment
practices  that have  helped  our  fixed-income  funds  perform so well over the
years. In 1998,  two-thirds of American Century bond funds beat their peer group
average, according to Lipper, Inc.

CONSISTENT  INVESTMENT  PHILOSOPHY--American  Century  fixed-income  funds  will
continue to offer a "pure play" on their sector of the market, as they did under
Benham.

CONTINUITY  OF THE  MANAGEMENT  TEAM--The  investment  process  is not all  that
remains  the same;  we've  retained  our core team of  experienced  fixed-income
portfolio managers.

    *  Experience--The  more than 35 fixed-income  investment  professionals  at
       American  Century have an average of nine years of investment  management
       experience.

    *  Bigger and better--Since  American Century was formed,  we've doubled the
       size  of the  original  Benham  management  team  in our  Mountain  View,
       California office.

TRADITION OF INNOVATION--Like  Benham before it, American Century is a leader in
fixed-income  fund  innovation.  For example,  we introduced a total of four new
fixed-income  funds  in the  last  three  years,  including  the  first  no-load
inflation-adjusted bond fund.

We continue to run our fixed-income operation from our offices in Mountain View,
California, which is also home to our walk-in Investor Center.

We look forward to continuing to meet your fixed-income  investment needs in the
Benham tradition.

WHAT'S NEW . . .

     We now classify our funds in easy-to-remember categories based on objective
and risk. The four  objective  categories  are:  CAPITAL  PRESERVATION,  INCOME,
GROWTH AND INCOME,  and GROWTH.  The three risk  categories  are:  CONSERVATIVE,
MODERATE,  and AGGRESSIVE.  This new  classification  system makes it easier for
investors to identify which funds are right for them.

     Turn to the  inside  back  cover of this  report to see a list of the funds
classified by objective and risk. For  definitions of the fund  categories,  see
the Glossary.

Past performance is no guarantee of future results.

[left margin]

INFLATION-ADJUSTED TREASURY
- ---------------------------


Our Message to You
- --------------------------------------------------------------------------------
/photo of James E. Stowers III and James E. Stowers, Jr./
James E. Stowers III, seated, with James E. Stowers, Jr.

     U.S. inflation remained subdued during the year ended March 31, 1999, which
translated into modest returns for Inflation-Adjusted Treasury. There were signs
in the first half of 1998 that inflation  might pick up due to the strong growth
of the U.S. economy,  but those expectations were dashed by the global financial
crises that erupted last summer.

     However, inflation hasn't vanished completely from the scene. U.S. economic
growth accelerated in the fourth quarter of 1998 and maintained a strong pace in
the first quarter of 1999. That growth,  combined with a tight U.S. labor market
and rising  oil  prices,  has fueled  renewed  expectations  of higher  consumer
prices.  While a big inflation  increase still seems unlikely,  there's a strong
consensus  view that inflation will be higher in 1999 than in 1998, and that the
lowest inflation figures in this business cycle are probably behind us.

     At  American  Century,  our focus  continues  to be on making us easy to do
business with and on helping investors reach their financial goals. In March, we
consolidated all our funds under the American Century name.  Though we are proud
of the venerable Twentieth Century and Benham names, we believe the change makes
it simpler for you to identify your funds.

     We also reclassified all 71 of our funds based on investment goals and risk
levels,  so you can more  easily  choose  the funds  that are  right for you.  A
complete list of American Century funds,  arranged by their new classifications,
is on the inside back cover of this report.

     In   addition,   we've  made  some   enhancements   to  our  Web  site  (at
www.americancentury.com).  Among the new  features  are daily fund  information,
including  return and price data,  market and national  news, and a Forms Center
with access to the most-requested investor forms and applications.  You can also
sign up to receive fund prospectuses and shareholder reports electronically.

     Finally, here's our latest Year 2000 readiness update. Our critical systems
have been  renovated,  tested,  and returned to production.  We continue to test
these systems,  as well as participate in industry-wide  tests with our business
partners.

     As always, we appreciate your continued confidence in American Century.

Sincerely,

/s/James E. Stowers, Jr.                 /s/James E. Stowers III
James E. Stowers, Jr.                    James E. Stowers III
Chairman of the Board and Founder        Chief Executive Officer

[right margin]

                 Table of Contents
   Report Highlights ......................................................    2
   Market Perspective .....................................................    3
INFLATION-ADJUSTED TREASURY
   Performance Information ................................................    4
   Management Q&A .........................................................    5
   Portfolio at a Glance ..................................................    5
   Portfolio Composition
      by Security Type ....................................................    6
   Portfolio Composition
      by Maturity .........................................................    7
   Schedule of Investments ................................................    8
FINANCIAL STATEMENTS
   Statement of Assets and
      Liabilities .........................................................    9
   Statement of Operations ................................................   10
   Statements of Changes
      in Net Assets .......................................................   11
   Notes to Financial
      Statements ..........................................................   12
   Financial Highlights ...................................................   15
   Report of Independent
      Accountants .........................................................   17
OTHER INFORMATION
   Share Class and Retirement
      Account Information .................................................   18
   Background Information
      Investment Philosophy
         and Policies .....................................................   19
      Comparative Indices .................................................   19
      Investment Team
         Leaders ..........................................................   19
   Glossary ...............................................................   20


                                                  www.americancentury.com      1


Report Highlights
- --------------------------------------------------------------------------------

MARKET PERSPECTIVE

*   Inflation-indexed  securities posted small gains during the year ended March
    31, 1999, amid a lack of demand for inflation protection.

*   Bond investors began the period  concerned about inflation;  however,  those
    fears soon evaporated amid a series of global economic crises.

*   An expected  slowdown in U.S. growth never  materialized,  either.  And with
    global economies  beginning to improve in 1999, the  "safe-haven"  appeal of
    Treasurys diminished and their prices fell.

*   The  prices  of  Treasury  inflation-indexed  securities  (TIIS)  were  also
    dampened by increased supply and relatively light demand.

*   With supply growing and demand  subdued,  real yields (see pages 5- 6 for an
    explanation  of real yields) on 10-year TIIS rose from 3.79% at the start of
    the period to 3.93% by the end of March.

*   Despite the economy's robust growth, the consumer price index rose only 1.7%
    for the year,  translating into a small adjustment to the principal value of
    TIIS.

FUND PERFORMANCE

*   Inflation-Adjusted  Treasury's  return  reflected  the  increase in the real
    yields of TIIS and the small increase in inflation.

*   The majority of the performance disparity between the fund and its benchmark
    can be attributed to expenses that reduce the returns of the fund, but which
    the benchmark doesn't incur.

*   The rest of the  difference was mainly a result of the  underperformance  of
    the  portfolio's  inflation-indexed  government  agency  issue  relative  to
    comparable TIIS.

FUND STRATEGY

*   We kept  Inflation-Adjusted  Treasury's  sensitivity  to changes in interest
    rates  (duration)  neutral  relative to its benchmark for most of the fiscal
    year.

*   That meant lengthening duration considerably from April through September as
    the market extended with the issuance of about $16 billion in 30-year TIIS.

*   Over  the  last  six  months,   however,  we  shortened   Inflation-Adjusted
    Treasury's  duration  to reflect  the  infusion  of roughly  $16  billion in
    10-year TIIS into the market.

*   Looking ahead, we will continue to emphasize a neutral duration  relative to
    Inflation-Adjusted  Treasury's  benchmark,  a position  that  should help to
    ensure   that  the  fund's   performance   reflects   that  of  the  broader
    inflation-indexed securities market.

[left margin]

       INFLATION-ADJUSTED TREASURY(1)
TOTAL RETURNS:               AS OF 3/31/99
    6 Months                     -0.06%(2)
    1 Year                           3.37%
30-DAY SEC YIELD:                    6.60%
INCEPTION DATE:                    2/10/97
NET ASSETS:                $9.0 million(3)

(1)  Investor Class.
(2)  Not annualized.
(3)  Includes Investor and Advisor Classes.

See Total Returns on page 4.
Investment terms are defined in the Glossary on pages 20-21.


2      1-800-345-2021


Market Perspective from Randall W. Merk
- --------------------------------------------------------------------------------
/photo of Randall W. Merk/
Randall W. Merk, chief investment officer of fixed income

MODEST RETURNS

     Inflation-indexed securities posted small gains during the year ended March
31,  1999.  Trailing  the  returns  of the  broader  Treasury  market,  Treasury
inflation-indexed  securities  (TIIS)  suffered  from  lackluster  interest  for
inflation protection.

GLOBAL UPHEAVAL . . .

     Bond  investors  began the period  with the specter of  inflation  at their
doorstep--tight labor markets and stronger-than-expected U.S. growth had sparked
concern that prices would rise. However, the market's inflation fears evaporated
amid a series of global  economic  crises.  By the end of the third  quarter  of
1998,  demand for the safety and  liquidity  of  Treasurys  had surged,  sending
yields  to  record  lows  (see  the  nominal  10-year   Treasury  yield  in  the
accompanying  graph).  Worried by the  global  economic  sluggishness,  the U.S.
Federal  Reserve (the Fed) cut  short-term  interest  rates three times  between
September and November.

 . . . LED TO UNSUSTAINABLE PRICES.

     Despite the ensuing build-up of market  expectations for slower U.S. growth
and further rate cuts,  neither  materialized.  The U.S.  economy  expanded at a
surprisingly brisk 6% annual pace during the final three months of 1998, and the
Fed held rates  steady  through  the first  quarter of 1999.  Meanwhile,  global
economies began improving,  causing Treasurys'  "safe-haven" appeal to diminish.
Bereft of support,  bond prices fell  steadily  during the first three months of
1999.

INFLATION-INDEXED BOND MARKET CONTINUED TO GROW

     TIIS prices were also dampened by increased  supply--roughly $16 billion of
10-year  TIIS and about $16 billion of 30-year  TIIS were  auctioned by the U.S.
Treasury  Department during the past year. As a result,  the average maturity of
the  inflation-indexed  Treasury  market  extended  to 11.9  years by the end of
March.  With supply growing and demand for inflation  protection  subdued,  real
yields (see pages 5-6 for an  explanation  of real  yields) on 10-year TIIS rose
from 3.79% at the start of the period to 3.93% by the end of March.

INFLATION REMAINED TAME

     Defying  expectations,   the  U.S.  economy's  growth  was  accompanied  by
relatively  benign  inflation  levels--the  consumer price index (CPI) rose only
1.7% for the year. Low inflation translated into a small change in the principal
values of TIIS,  which are adjusted  based on changes in the CPI. The  principal
adjustments  for the year ended March 31,  1999,  totaled  1.67%,  only 0.67% of
which was provided over the last six months.

[right margin]

"WITH SUPPLY GROWING AND DEMAND FOR INFLATION PROTECTION SUBDUED, REAL YIELDS ON
10-YEAR TIIS ROSE FROM 3.79%  AT THE START OF THE PERIOD TO 3.93% BY THE END OF
MARCH."

[line graph - data below]

10-YEAR TREASURY YIELD COMPARISON
                       10-Year                  10-Year
DATE                 TIIS Yield             Nominal Treasury
3-Apr-98                3.77%                    5.57%
10-Apr-98               3.80%                    5.66%
24-Apr-98               3.74%                    5.73%
8-May-98                3.78%                    5.77%
22-May-98               3.80%                    5.74%
12-Jun-98               3.75%                    5.52%
26-Jun-98               3.77%                    5.56%
10-Jul-98               3.80%                    5.51%
24-Jul-98               3.80%                    5.56%
14-Aug-98               3.85%                    5.46%
28-Aug-98               3.82%                    5.15%
11-Sep-98               3.68%                    4.89%
25-Sep-98               3.64%                    4.61%
9-Oct-98                3.66%                    4.87%
23-Oct-98               3.61%                    4.78%
13-Nov-98               3.82%                    4.89%
27-Nov-98               3.78%                    4.87%
11-Dec-98               3.82%                    4.69%
25-Dec-99               3.83%                    4.98%
8-Jan-99                3.86%                    5.00%
22-Jan-99               3.82%                    4.77%
12-Feb-99               3.83%                    5.23%
26-Feb-99               3.89%                    5.43%
12-Mar-99               3.95%                    5.32%
26-Mar-99               3.93%                    5.38%

Source: Bloomberg Financial Markets


                                                  www.americancentury.com      3


Inflation-Adjusted Treasury--Performance
- --------------------------------------------------------------------------------

<TABLE>
TOTAL RETURNS AS OF MARCH 31, 1999

                      INVESTOR CLASS (INCEPTION 2/10/97)         ADVISOR CLASS (INCEPTION 6/15/98)
                     INFLATION-    SALOMON       SALOMON      INFLATION-     SALOMON       SALOMON
                      ADJUSTED    INFLATION-     TREASURY      ADJUSTED     INFLATION-     TREASURY
                      TREASURY    LINKED INDEX    INDEX        TREASURY    LINKED INDEX     INDEX
<S>                 <C>           <C>          <C>           <C>           <C>           <C>
6 MONTHS(1)            -0.06%       -0.01%        -5.17%        -0.16%        -0.01%        -5.17%
1 YEAR                  3.37%        4.10%         7.09%          --            --            --
==================================================================================================
AVERAGE ANNUAL RETURNS
==================================================================================================
LIFE OF FUND            2.23%       3.17%(2)     11.74%(2)       1.94%       2.78%(3)       2.32%(3)
</TABLE>

(1) Returns for periods less than one year are not annualized.

(2) Since  2/28/97,  the date nearest the class's  inception  for which data are
    available.

(3) Since  6/30/98,  the date nearest the class's  inception  for which data are
    available.

See pages 18-20 for more  information  about  share  classes,  returns,  and the
comparative indices.

[mountain graph - data below]

GROWTH OF $10,000 OVER LIFE OF FUND
Value on 3/31/99
Salomon Treasury Index               $12,603
Salomon Inflation-Linked Index       $10,671
Inflation-Adjusted Treasury          $10,543

              Salomon Inflation-     Inflation-Adjusted     Salomon Treasury
                 Linked Index             Treasury                Index
DATE                 VALUE                  VALUE                 VALUE
2/28/97             $10,000                $10,000               $10,000
3/31/97              $9,863                 $9,858                $9,756
4/30/97              $9,932                 $9,920                $9,981
5/31/97              $9,984                 $9,977               $10,099
6/30/97              $9,953                 $9,943               $10,291
7/31/97             $10,045                $10,034               $10,896
8/31/97             $10,077                $10,061               $10,589
9/30/97             $10,096                $10,076               $10,884
10/31/97            $10,206                $10,173               $11,253
11/30/97            $10,260                $10,224               $11,400
12/31/97            $10,213                $10,161               $11,592
1/31/98             $10,266                $10,214               $11,826
2/28/98             $10,256                $10,207               $11,739
3/31/98             $10,250                $10,200               $11,767
4/30/98             $10,287                $10,225               $11,809
5/31/98             $10,354                $10,292               $12,033
6/30/98             $10,382                $10,316               $12,315
7/31/98             $10,431                $10,341               $12,261
8/31/98             $10,448                $10,337               $12,810
9/30/98             $10,672                $10,550               $13,288
10/31/98            $10,691                $10,580               $13,076
11/30/98            $10,684                $10,564               $13,189
12/31/98            $10,614                $10,512               $13,155
1/31/99             $10,741                $10,608               $13,281
2/28/99             $10,666                $10,543               $12,629
3/31/99             $10,671                $10,543               $12,603

$10,000 investment made 2/28/97*

The graph at left shows the growth of a $10,000  investment over the life of the
fund,  while the graph  below  shows the fund's  year-by-year  performance.  The
Salomon  Treasury  and  Salomon   Inflation-Linked   indices  are  provided  for
comparison.   Inflation-Adjusted  Treasury's  total  return  includes  operating
expenses (such as transaction  costs and management  fees) that reduce  returns,
while the total  returns of the indices do not. The graphs are based on Investor
Class shares only; performance for other classes will vary due to differences in
fee structures (see the Total Returns table above).  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.

[bar graph - data below]

ONE-YEAR RETURNS OVER LIFE OF FUND (PERIODS ENDED MARCH 31)
              Inflation-Adjusted     Salomon Inflation-
                  Treasury              Linked Index
DATE               RETURN                 RETURN
3/31/97*           -1.42%                 -1.37%
3/31/98             3.45%                  3.92%
3/31/99             3.37%                  4.10%

* From 2/28/97 (the date nearest the class's  inception for which index data are
  available).


4      1-800-345-2021


Inflation-Adjusted Treasury--Q&A
- --------------------------------------------------------------------------------
/photo of Dave Schroeder/

     An   interview   with  Dave   Schroeder,   a   portfolio   manager  on  the
Inflation-Adjusted Treasury fund investment team.

HOW DID THE FUND PERFORM DURING THE YEAR ENDED MARCH 31, 1999?

     Inflation-Adjusted  Treasury's  return  reflected  the increase in the real
yields of Treasury inflation-indexed securities (TIIS) and the small increase in
inflation.  For the fiscal year ended March 31, 1999, the fund returned  3.37%,*
compared  with the 4.10% return of the Salomon  Brothers  U.S.  Inflation-Linked
Index. (See the previous page for other fund performance comparisons.)

     The  majority  of the  performance  disparity  between  the  fund  and  its
benchmark   can  be   attributed   to  expenses   that  reduce  the  returns  of
Inflation-Adjusted Treasury, but which the benchmark doesn't incur.

     The rest of the difference was mainly a result of the  underperformance  of
the portfolio's inflation-indexed government agency issue relative to comparable
TIIS. Agency securities  underperformed Treasurys in 1998--yield spreads, or the
interest  rate  difference   between  different  types  of   comparable-maturity
securities,  widened  as  "flight-to-quality"  buying  favored  the  safety  and
liquidity of Treasurys over other debt  securities (see page 3). The portfolio's
overweight in 10-year TIIS, and subsequent  underweight in TIIS maturing in five
and thirty years, also hindered performance.

YOU MENTIONED THAT THE INCREASE IN "REAL YIELDS" WAS PART OF THE REASON BEHIND
THE FUND'S SUBDUED RETURNS. HOW DO REAL YIELDS DIFFER FROM NOMINAL ONES?

     Real yields are actually a part of nominal  yields,  so let's  examine them
first.  Nominal  bond yields can be broken down into two  components:  a real or
after-inflation rate and an inflation premium. The inflation premium is the rate
of inflation expected over the life of the bond.

     TIIS eliminate the inflation premium and therefore the inflation risk. That
means that the  securities  trade at a real  interest  rate or yield,  while the
principal  amount  of a TIIS  is  adjusted  to  compensate  the  bondholder  for
inflation  increases.  And  because  these  securities  eliminate  the risk that
inflation will erode investors' purchasing power, TIIS offer inflation-protected
returns.

     However,  with inflation  remaining  tame during the past year,  demand for
inflation-indexed  securities  was slim,  causing  TIIS prices to edge lower and
their real yields to rise.

* All fund returns referenced in this interview are for Investor Class shares.

[right margin]

"INFLATION-ADJUSTED TREASURY'S RETURN REFLECTED THE INCREASE  IN THE REAL
YIELDS OF TREASURY INFLATION-INDEXED SECURITIES  AND THE SMALL INCREASE IN
INFLATION."

PORTFOLIO AT A GLANCE
                               3/31/99           3/31/98
NUMBER OF SECURITIES             4                  3
WEIGHTED AVERAGE
   MATURITY                   11.3 YRS            6.9 YRS
AVERAGE DURATION               8.5 YRS            5.9 YRS
EXPENSE RATIO (FOR
   INVESTOR CLASS)              0.49%             0.50%

YIELD AS OF MARCH 31, 1999
                              INVESTOR           ADVISOR
                                CLASS             CLASS
30-DAY SEC YIELD                6.60%             6.52%

Investment terms are defined in the Glossary on pages 20-21.


                                                  www.americancentury.com      5


Inflation-Adjusted Treasury--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

SO THE YIELDS ON INFLATION-INDEXED SECURITIES ARE REAL RATHER THAN NOMINAL?

     That's correct.  TIIS trade based on their real yields,  and the principal,
or face value  amount,  of the  security  is  adjusted to account for changes in
inflation.  To gauge  inflation,  the  government  uses the consumer price index
(CPI),  lagged three months.  For example,  CPI rose in March, and that increase
will be applied to TIIS prices in May. And because CPI  adjustments  are treated
as income,  an increase in consumer prices causes the fund's 30-day SEC yield to
rise.

     So after adding that  adjustment  to the real yields  currently  offered by
TIIS, the 30-day SEC yield on Inflation-Adjusted Treasury should rise from 5.17%
on April 30 to over 7% by the start of June.  That's quite an  attractive  yield
compared with the nominal 10-year Treasury,  which offered a yield of only 5.32%
at the end of April.

ARE LARGE MONTHLY YIELD SWINGS TYPICAL FOR INFLATION-ADJUSTED TREASURY?

     Yes. The fund's 30-day SEC yield has been as low as 2.71% in March 1997 and
as high as  6.96% in  December  1998.  As  we've  discussed,  the  yield  varies
depending on CPI adjustments.

     During a month where there's  little change to the CPI,  Inflation-Adjusted
Treasury's 30-day SEC yield will be close to the prevailing real yields on TIIS.
Likewise, in a month that TIIS prices rise because of a previous increase in the
CPI, the fund's  yield will reflect not only real yields,  but also the increase
that comes from the annualized principal adjustment.

SPEAKING OF ADJUSTMENTS, HOW DID  YOU MANAGE THE PORTFOLIO DURING THE FISCAL
YEAR?

     Most  importantly,  we kept  Inflation-Adjusted  Treasury's  sensitivity to
changes in interest rates (duration)  neutral relative to its benchmark for most
of the fiscal year.  That meant  lengthening  duration  considerably  from April
through  September  as the market  extended  with the issuance of $16 billion in
30-year TIIS.

     Over the last six months,  however,  we shortened the portfolio's  duration
from 9.2 years to 8.5 years to reflect  the  infusion  of $16 billion in 10-year
TIIS into the market.

LOOKING AHEAD, WHERE DO YOU THINK INFLATION AND INTEREST RATES ARE HEADED?

     So far  this  year,  U.S.  growth  has  remained  surprisingly  robust  and
relatively  inflation free. Powered by the biggest increase in consumer spending
in 11 years, the economy grew at a greater-than-expected 4.5% annual pace during
the first quarter of 1999.  However,  accompanying  that vibrant growth has been
minimal inflation--consumer prices rose a mere 1.7% for the year ended March 31

     Although we expect U.S.  monetary policy to remain on hold throughout 1999,
the economy's  surprising  vitality during the first quarter  increases the risk
that the Fed will be forced to raise interest rates.

[left margin]

"THE FUND'S 30-DAY SEC YIELD HAS BEEN AS LOW AS 2.71% IN MARCH 1997 AND AS
HIGH AS 6.96% IN DECEMBER 1998. . .THE YIELD VARIES DEPENDING ON CPI
ADJUSTMENTS."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF MARCH 31, 1999
U.S. Treasury Securities             69%
U.S. Government Agency Securities    31%

AS OF SEPTEMBER 30, 1998
U.S. Treasury Securities             70%
U.S. Government Agency Securities    30%

Security types are defined on pages 20-21.


6      1-800-345-2021


Inflation-Adjusted Treasury--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

DO YOU THINK INFLATION WILL REMAIN THAT WELL BEHAVED GOING FORWARD?

     That's always a  possibility,  but we think it's an unlikely one. Low crude
oil costs dampened overall  consumer prices in 1998--as  measured by a component
of the CPI,  fuel prices fell 8.8% last year.  Unfortunately,  that  support has
been knocked  aside in 1999--oil  prices  reached  16-month  highs at the end of
April following OPEC's decision to decrease production.

     As a result,  we believe  that  consumer  prices will begin to increase and
wouldn't be  surprised to see overall CPI rise by as much as 2-2.5% by year end.
Although  consumer prices may increase later this year,  inflation has been well
behaved in the  '90s--annual CPI increases have ranged from 6.1% in 1990 to only
1.6% in 1998.

WITH THOSE POINTS IN MIND, WHAT'S YOUR OUTLOOK FOR INFLATION-INDEXED SECURITIES

     We think that  inflation-indexed  securities offer very good relative value
right now compared with other types of U.S.  government  bonds.  As inflationary
pressures  have begun to build,  we've seen investor  interest begin to pick up.
That interest has been partially fueled by the attractiveness of real yields; at
around a 4% real yield,  10-year TIIS adjusted for the latest  inflation  figure
would have a nominal yield of around 5.7%.

     If the CPI rises to around 2.5%,  then the nominal  yield of a 10-year TIIS
would be 6.5%, which compares favorably with traditional  10-year Treasury notes
now yielding between 5.25% and 5.5%. Also, if inflation begins to rise, then the
prices   of   regular   Treasurys   will   likely   fall  in   response,   while
inflation-indexed securities may see a surge of renewed interest.

DO YOU INTEND TO MAKE ANY SIGNIFICANT  CHANGES TO THE PORTFOLIO IN LIGHT OF THAT
OUTLOOK?

     No.  We plan  to  continue  emphasizing  a  neutral  duration  relative  to
Inflation-Adjusted  Treasury's  benchmark,  which  should  help  ensure that the
fund's  performance  reflects that of the broader  inflation-indexed  securities
market.  To  accomplish  that goal,  we will  probably  keep the majority of the
portfolio in TIIS and maintain the remaining 30-35% in agencys. Overall, we will
continue  to  manage  the  fund  conservatively  to  provide  investors  with  a
long-term, inflation-protected vehicle.

[right margin]

"IF CPI RISES TO AROUND 2.5%,  THEN THE NOMINAL YIELD OF A 10-YEAR TIIS WOULD BE
6.5%, WHICH COMPARES FAVORABLY WITH TRADITIONAL  10-YEAR TREASURY NOTES YIELDING
BETWEEN 5.25% AND 5.5%."

[pie charts - data below]

PORTFOLIO COMPOSITION BY MATURITY

AS OF MARCH 31, 1999
10-Year Notes         84%
30-Year Bonds         16%

AS OF SEPTEMBER 30, 1998
10-Year Notes         40%
30-Year Bonds         31%
5-Year Notes          29%


                                                  www.americancentury.com      7


Inflation-Adjusted Treasury--Sched. of Investments
- --------------------------------------------------------------------------------

MARCH 31, 1999

Principal Amount                                                      Value
- --------------------------------------------------------------------------------
U.S. TREASURY SECURITIES--68.9%
               $3,784,795  U.S. Treasury Inflation Indexed
                              Notes, 3.375%, 1/15/07              $3,642,866
                1,016,910  U.S. Treasury Inflation Indexed
                              Notes, 3.625%, 1/15/08                 992,758
                1,447,444  U.S. Treasury Inflation Indexed
                              Bonds, 3.625%, 4/15/28               1,382,762
                                                                 ------------
TOTAL U.S. TREASURY SECURITIES                                     6,018,386
                                                                 ------------
   (Cost $6,112,335)

Principal Amount                                                      Value
- --------------------------------------------------------------------------------
U.S. GOVERNMENT AGENCY SECURITIES--31.1%
               $2,903,404  TVA Inflation Indexed Notes,
                              3.375%, 1/15/07                     $2,718,297
                                                                 ------------
   (Cost $2,787,980)

TOTAL INVESTMENT SECURITIES--100.0%                               $8,736,683
                                                                 ============
   (Cost $8,900,315)

NOTES TO SCHEDULE OF INVESTMENTS

TVA = Tennessee Valley Authority

- --------------------------------------------------------------------------------
UNDERSTANDING  THE  SCHEDULE  OF  INVESTMENTS--This  schedule  tells  you  which
investments your fund owned on the last day of the reporting period.

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

* the percent and dollar breakdown of each investment category

                                              See Notes to Financial Statements


8      1-800-345-2021


Statement of Assets and Liabilities
- --------------------------------------------------------------------------------

MARCH 31, 1999

ASSETS
Investment securities, at value
  (identified cost of $8,900,315)
  (Note 3) ...............................................          $ 8,736,683
Cash .....................................................                  395
Investment in affiliated money
  market fund (Note 2) ...................................              197,850
Interest and other receivables ...........................               78,140
                                                                    -----------
                                                                      9,013,068
                                                                    -----------
LIABILITIES
Disbursements in excess
  of demand deposit cash .................................                4,914
Payable for capital shares redeemed ......................                5,642
Accrued management fees (Note 2) .........................                3,763
Distribution and service fees
  payable (Note 2) .......................................                    4
Dividends payable ........................................                8,084
                                                                    -----------
                                                                         22,407
                                                                    -----------
Net Assets ...............................................          $ 8,990,661
                                                                    ===========

NET ASSETS CONSIST OF:
Capital paid in ..........................................          $ 9,224,890
Accumulated net realized
  loss on investments ....................................              (70,597)
Net unrealized depreciation
  on investments (Note 3) ................................             (163,632)
                                                                    -----------
                                                                    $ 8,990,661
                                                                    ===========

Investor Class
Net assets ...............................................          $ 8,980,426
Shares outstanding .......................................              947,516
Net asset value per share ................................          $      9.48

Advisor Class
Net assets ...............................................          $    10,235
Shares outstanding .......................................                1,080
Net asset value per share ................................          $      9.48

- --------------------------------------------------------------------------------
UNDERSTANDING  THE STATEMENT OF ASSETS AND  LIABILITIES--This  statement details
what the fund owns (assets),  what it owes (liabilities),  and its net assets as
of the last day of the period.  If you subtract  what the fund owes from what it
owns,  you get the fund's net assets.  For each class of shares,  the net assets
divided  by the total  number of  shares  outstanding  gives you the price of an
individual share, or the net asset value per share.

NET ASSETS are also broken down by capital (money invested by shareholders); net
gains earned on investments  but not yet paid to  shareholders  or net losses on
investments (known as realized gains or losses); and finally, gains or losses on
securities  still  owned  by the  fund  (known  as  unrealized  appreciation  or
depreciation).  This  breakdown  tells  you the  value  of net  assets  that are
performance-related,  such as investment  gains or losses,  and the value of net
assets that are not related to performance,  such as shareholder investments and
redemptions.

See Notes to Financial Statements


                                                  www.americancentury.com      9


Statement of Operations
- --------------------------------------------------------------------------------

YEAR ENDED MARCH 31, 1999

INVESTMENT INCOME
Income:
Interest ..................................................           $ 373,125
                                                                      ---------
Expenses (Note 2):
Management fees ...........................................              34,333
Distribution fees -- Advisor Class ........................                  20
Service fees -- Advisor Class .............................                  20
Trustees' fees and expenses ...............................                 327
                                                                      ---------
  Total expenses ..........................................              34,700
Amount reimbursed .........................................                 (76)
                                                                      ---------
  Net expenses ............................................              34,624
                                                                      ---------
Net investment income .....................................             338,501
                                                                      ---------

REALIZED AND UNREALIZED
LOSS ON INVESTMENTS (NOTE 3)
Net realized loss on investments ..........................             (20,024)
Change in net unrealized
  depreciation on investments .............................            (111,410)
                                                                      ---------
Net realized and unrealized
  loss on investments .....................................            (131,434)
                                                                      ---------
Net Increase in Net Assets
  Resulting from Operations ...............................           $ 207,067
                                                                      =========

- --------------------------------------------------------------------------------
UNDERSTANDING  THE STATEMENT OF  OPERATIONS--This  statement breaks down how the
fund's  net  assets  changed  during  the  period  as a  result  of  the  fund's
operations.  It tells you how much money the fund made or lost after taking into
account income,  fees and expenses,  and investment gains or losses. It does not
include shareholder transactions and distributions.

Fund OPERATIONS include:

* income earned from investments

* management fees and other expenses

* gains or losses from selling investments (known as realized gains or losses)

* gains or losses on current fund holdings (known as unrealized appreciation or
  depreciation)

                                              See Notes to Financial Statements


10      1-800-345-2021


Statements of Changes in Net Assets
- --------------------------------------------------------------------------------

YEARS ENDED MARCH 31, 1999 AND MARCH 31, 1998

Increase in Net Assets                                 1999             1998

OPERATIONS
Net investment income ........................     $   338,501      $   183,628
Net realized loss on investments .............         (20,024)         (50,573)
Change in net unrealized
  depreciation on investments ................        (111,410)          (6,914)
                                                   -----------      -----------
Net increase in net assets
   resulting from operations .................         207,067          126,141
                                                   -----------      -----------
DISTRIBUTIONS TO
SHAREHOLDERS From net investment income:
  Investor Class .............................        (338,135)        (183,628)
  Advisor Class ..............................            (366)            --
                                                   -----------      -----------
Decrease in net assets from
  distributions to shareholders ..............        (338,501)        (183,628)
                                                   -----------      -----------
CAPITAL SHARE TRANSACTIONS (NOTE 4)
Net increase in net assets from
  capital share transactions .................       3,842,717        3,059,489
                                                   -----------      -----------
Net increase in net assets ...................       3,711,283        3,002,002

NET ASSETS
Beginning of year ............................       5,279,378        2,277,376
                                                   -----------      -----------
End of year ..................................     $ 8,990,661      $ 5,279,378
                                                   ===========      ===========

- --------------------------------------------------------------------------------
UNDERSTANDING THE STATEMENTS OF CHANGES IN NET ASSETS--These statements show how
the fund's net assets  changed over the past two reporting  periods.  It details
how much a fund grew or shrank as a result of:

* operations--a summary of the Statement of Operations from the previous page
  for the most recent period

* distributions--income and gains distributed to shareholders

* share transactions--shareholders' purchases, reinvestments, and redemptions

Net  assets  at the  beginning  of  the  period  plus  the  sum  of  operations,
distributions and capital share transactions  result in net assets at the end of
the period.

See Notes to Financial Statements


                                                 www.americancentury.com      11


Notes to Financial Statements
- --------------------------------------------------------------------------------

MARCH 31, 1999

1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     ORGANIZATION  -- American  Century  Government  Income Trust (the trust) is
registered under the Investment  Company Act of 1940 as an open-end  diversified
management  investment company.  Inflation-Adjusted  Treasury Fund (the fund) is
one of the eight funds issued by the trust. The fund's  investment  objective is
to  provide  a  total  return   consistent  with  investment  in  U.S.  Treasury
inflation-adjusted  securities.  The  fund  may  also  invest  in U.S.  Treasury
securities which are not indexed to inflation for liquidity and total return, or
if at any time the manager believes there is an inadequate supply of appropriate
Treasury  inflation-adjusted   securities  in  which  to  invest.  The  fund  is
authorized  to issue two classes of shares:  the Investor  Class and the Advisor
Class.  The two  classes  of  shares  differ  principally  in  their  respective
shareholder servicing and distribution expenses and arrangements.  All shares of
the fund  represent  an equal pro rata  interest  in the  assets of the class to
which such shares belong, and have identical voting,  dividend,  liquidation and
other  rights  and the same  terms and  conditions,  except  for class  specific
expenses  and  exclusive  rights to vote on matters  affecting  only  individual
classes.  Sale of the Advisor  Class  commenced on June 15, 1998.  The following
significant  accounting  policies  are in  accordance  with  generally  accepted
accounting principles; these principles may require the use of estimates by fund
management.

     SECURITY  VALUATIONS -- Securities are valued 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 as of the
trade date. 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 accretion of discounts and amortization of premiums.

     REPURCHASE AGREEMENTS -- The fund may enter into repurchase agreements with
institutions that the fund's  investment  advisor,  American Century  Investment
Management,  Inc. (ACIM),  has determined are creditworthy  pursuant to criteria
adopted by the Board of Trustees. Each repurchase agreement is recorded at cost.
The fund requires that the collateral,  represented by securities, received in a
repurchase  transaction  be  transferred  to the  fund's  custodian  in a manner
sufficient  to enable  the fund to  obtain  those  securities  in the event of a
default under the repurchase  agreement.  ACIM monitors,  on a daily basis,  the
securities  transferred to ensure the value,  including accrued interest, of the
securities  under each repurchase  agreement is greater than amounts owed to the
fund under each repurchase agreement.

     JOINT  TRADING  ACCOUNT -- Pursuant  to an  Exemptive  Order  issued by the
Securities  and  Exchange  Commission,  the fund,  along with  other  registered
investment  companies  having  management  agreements  with ACIM,  may  transfer
uninvested  cash  balances  into a joint  trading  account.  These  balances are
invested in one or more repurchase agreements that are collateralized by U.S.
Treasury or Agency obligations.

     INCOME  TAX  STATUS  -- It is the  fund's  policy  to  distribute  all  net
investment  income  and net  realized  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
income taxes.

     DISTRIBUTIONS TO SHAREHOLDERS -- Distributions  from net investment  income
are declared  daily and  distributed  monthly.  Distributions  from net realized
gains are declared and paid annually.

     At March 31, 1999,  accumulated  net realized  capital loss  carryovers  of
approximately  $56,725  (expiring  in 2006  through  2007) may be used to offset
future taxable gains.

     The fund has elected to treat $9,570 of net realized losses incurred in the
five month period ended March 31, 1999, as having been incurred in the following
fiscal year.

     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  reflect the differing character
of  certain  income  items and net  realized  gains  and  losses  for  financial
statement  and tax purposes  and may result in  reclassification  among  certain
capital accounts.

     ADDITIONAL  INFORMATION  -- Funds  Distributor,  Inc.  (FDI) is the trust's
distributor. Certain officers of FDI are also officers of the trust.


12      1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)

MARCH 31, 1999

- --------------------------------------------------------------------------------
2. TRANSACTIONS WITH RELATED PARTIES

     The trust has entered into a Management  Agreement  with ACIM that provides
the fund with  investment  advisory  and  management  services in exchange for a
single,  unified management fee per class. Expenses excluded from this agreement
are brokerage, taxes, portfolio insurance,  interest, fees and expenses of those
Trustees  who  are  not  considered  "interested  persons"  as  defined  in  the
Investment  Company  Act of 1940  (including  counsel  fees)  and  extraordinary
expenses.  The fee is  calculated  daily and paid  monthly.  It  consists  of an
Investment  Category  Fee  based on the  average  net  assets  of the funds in a
specific fund's  investment  category and a Complex Fee based on the average net
assets of all the funds managed by ACIM. The rates for the  Investment  Category
fee range from  0.1625% to 0.2800% and the rates for the  Complex Fee  (Investor
Class) range from 0.2900% to 0.3100%.  The Advisor Class is 0.2500% less at each
point  within the Complex  Fee range.  For the year ended  March 31,  1999,  the
effective annual Investor Class management fee was 0.51%.

     The Board of Trustees has adopted the Advisor Class Master Distribution and
Shareholder  Services Plan (the plan),  pursuant to Rule 12b-1 of the Investment
Company  Act of 1940.  The plan  provides  that the fund will pay ACIM an annual
distribution  fee equal to 0.25% and  service  fee equal to 0.25%.  The fees are
computed  daily and paid  monthly  based on the Advisor  Class's  average  daily
closing net assets  during the previous  month.  The  distribution  fee provides
compensation for distribution  expenses incurred by financial  intermediaries in
connection  with  distributing  shares of the Advisor Class  including,  but not
limited to, payments to brokers,  dealers, and financial  institutions that have
entered into sales  agreements  with respect to shares of the fund.  The service
fee provides  compensation for shareholder and administrative  services rendered
by ACIM, its affiliates or independent  third party providers.  Fees incurred by
the fund under the plan during the year ended March 31, 1999 were $40.

     Certain  officers  and  Trustees  of the  trust  are also  officers  and/or
directors,  and,  as a  group,  controlling  stockholders  of  American  Century
Companies,  Inc., the parent of the trust's  investment  manager,  ACIM, and the
trust's transfer agent, American Century Services Corporation.

     As of March 31, 1999,  the fund had invested  $197,850 in shares of Capital
Preservation  Fund,  which is a series of  American  Century  Government  Income
Trust.  The terms of the  transaction  were identical to those with  non-related
entities except that, to avoid duplicate  management  fees, the fund did not pay
ACIM  management  fees with respect to assets  invested in Capital  Preservation
Fund.

- --------------------------------------------------------------------------------
3. INVESTMENT TRANSACTIONS

     Purchases  and sales of U.S.  Treasury  and Agency  obligations,  excluding
short-term investments, totaled $12,136,043 and $8,621,764, respectively.

     As of March 31, 1999, accumulated net unrealized depreciation was $167,934,
based on the aggregate  cost of  investments  for federal income tax purposes of
$8,904,617.  Accumulated  net  unrealized  depreciation  consisted  entirely  of
unrealized depreciation of $167,934.


                                                 www.americancentury.com      13


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
MARCH 31, 1999

- --------------------------------------------------------------------------------
4. CAPITAL SHARE TRANSACTIONS

  Transactions in shares of the fund were as follows (unlimited number of shares
authorized):

                                                       SHARES          AMOUNT
INVESTOR CLASS
Year ended March 31, 1999
Sold ............................................      663,668      $ 6,372,276
Issued in reinvestment of distributions .........       31,279          300,195
Redeemed ........................................     (295,763)      (2,840,158)
                                                      --------      -----------
Net increase ....................................      399,184      $ 3,832,313
                                                      ========      ===========

Year ended March 31, 1998
Sold ............................................      539,728      $ 5,246,272
Issued in reinvestment of distributions .........       17,153          166,664
Redeemed ........................................     (242,312)      (2,353,447)
                                                      --------      -----------
Net increase ....................................      314,569      $ 3,059,489
                                                      ========      ===========

ADVISOR CLASS
June 15, 1998(1) through March 31, 1999
Sold ............................................        1,043      $    10,051
Issued in reinvestment of distributions .........           37              353
Redeemed ........................................         --               --
                                                      --------      -----------
Net increase ....................................        1,080      $    10,404
                                                      ========      ===========

(1)  Commencement of sale of the Advisor Class.

- --------------------------------------------------------------------------------
5. BANK LOANS

    Effective  December  18,  1998,  the fund,  along with  certain  other funds
managed by ACIM,  entered  into an  unsecured  $570,000,000  bank line of credit
agreement  with  Chase  Manhattan  Bank.  Borrowings  under the  agreement  bear
interest at the Federal  Funds rate plus  0.40%.  The fund may borrow  money for
temporary or emergency  purposes to fund shareholder  redemptions.  The fund did
not borrow from the line during the period  December 18, 1998 through  March 31,
1999.

- --------------------------------------------------------------------------------
6. FUND EVENTS

  The following name change became effective March 1, 1999:

           =====================================================================
           NEW NAME                           FORMER NAME
           =====================================================================

  FUND:    Inflation-Adjusted Treasury Fund   American Century - Benham
                                              Inflation-Adjusted Treasury Fund


14      1-800-345-2021


<TABLE>
<CAPTION>
Inflation-Adjusted Treasury--Financial Highlights
- --------------------------------------------------------------------------------

FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED MARCH 31 (EXCEPT AS NOTED)

                                                     Investor Class
                                             1999          1998          1997(1)
PER-SHARE DATA
<S>                                       <C>           <C>           <C>
Net Asset Value, Beginning of Period ..   $    9.63     $    9.74     $   10.00
                                          ---------     ---------     ---------
Income From Investment Operations
  Net Investment Income ...............        0.47          0.44          0.06
  Net Realized and Unrealized Loss
  on Investment Transactions ..........       (0.15)        (0.11)        (0.26)
                                          ---------     ---------     ---------
  Total From Investment Operations ....        0.32          0.33         (0.20)
                                          ---------     ---------     ---------
Distributions
  From Net Investment Income ..........       (0.47)        (0.44)        (0.06)
                                          ---------     ---------     ---------
Net Asset Value, End of Period ........   $    9.48     $    9.63     $    9.74
                                          =========     =========     =========
  Total Return(2) .....................        3.37%         3.45%        (1.98)%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
  to Average Net Assets ...............        0.49%         0.50%         0.50%(3)
Ratio of Net Investment Income
  to Average Net Assets ...............        4.84%         4.45%         5.03%(3)
Portfolio Turnover Rate ...............         127%           69%         --
Net Assets, End of Period
(in thousands) ........................   $   8,980     $   5,279     $   2,277
</TABLE>

(1)  February 10, 1997 (inception) through March 31, 1997.
(2)  Total return assumes reinvestment of dividends and capital gains
     distributions, if any. Total returns for periods less than one
     year are not annualized.
(3)  Annualized.

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL HIGHLIGHTS--These  statements itemize current period
activity and  statistics  and provide  comparison  data for the last five fiscal
years (or less, if the class is not five years old).

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

* total return--the overall percentage return of the fund, assuming reinvestment
  of all distributions

* expense ratio--operating expenses as a percentage of average net assets

* net income ratio--net investment income as a percentage of average net assets

* portfolio turnover--the percentage of the portfolio that was replaced during
  the period

See Notes to Financial Statements


                                                 www.americancentury.com      15


Inflation-Adjusted Treasury--Financial Highlights
- --------------------------------------------------------------------------------
                                                                    (Continued)
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD INDICATED

                                                                 Advisor Class
                                                                    1999(1)
PER-SHARE DATA
Net Asset Value, Beginning of Period ......................         $  9.64
                                                                    -------
Income From Investment Operations
  Net Investment Income ...................................            0.34
  Net Realized and Unrealized Loss
  on Investment Transactions ..............................           (0.16)
                                                                    -------
  Total From Investment Operations ........................            0.18
                                                                    -------
Distributions
  From Net Investment Income ..............................           (0.34)
                                                                    -------
Net Asset Value, End of Period ............................         $  9.48
                                                                    =======
  Total Return(2) .........................................            1.94%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
  to Average Net Assets ...................................            0.74%(3)
Ratio of Net Investment Income
  to Average Net Assets ...................................            4.56%(3)
Portfolio Turnover Rate ...................................             127%
Net Assets, End of Period (in thousands) ..................         $    10

(1)  June 15, 1998 (commencement of sale) through March 31, 1999.
(2)  Total return assumes reinvestment of dividends and capital gains
     distributions, if any. Total returns for periods less than one
     year are not annualized.
(3)  Annualized.

                                              See Notes to Financial Statements


16      1-800-345-2021


Report of Independent Accountants
- --------------------------------------------------------------------------------

To the Trustees of the American Century Government Income Trust and Shareholders
of the Inflation-Adjusted Treasury Fund:

In our opinion, the accompanying statement of assets and liabilities,  including
the schedule of  investments,  and the related  statements of operations  and of
changes  in net assets  and the  financial  highlights  present  fairly,  in all
material  respects,  the financial position of the  Inflation-Adjusted  Treasury
Fund (formerly the American Century - Benham  Inflation-Adjusted  Treasury Fund)
(one  of the  eight  funds  in the  American  Century  Government  Income  Trust
hereafter  referred  to as the  "Fund") at March 31,  1999,  the  results of its
operations,  the changes in its net assets and financial  highlights for each of
the two years in the period then ended,  in conformity  with generally  accepted
accounting  principles.  The financial highlights for the period ended March 31,
1997 were audited by other auditors,  whose report dated May 2, 1997,  expressed
an  unqualified  opinion on those  statements.  These  financial  statements and
financial highlights  (hereafter referred to as "financial  statements") are the
responsibility  of the Fund's  management;  our  responsibility is to express an
opinion on these  financial  statements  based on our audits.  We conducted  our
audits of these  financial  statements in  accordance  with  generally  accepted
auditing  standards  which  require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the  amounts  and  disclosures  in  the  financial  statements,   assessing  the
accounting  principles  used and significant  estimates made by management,  and
evaluating the overall  financial  statement  presentation.  We believe that our
audits,  which  included  confirmation  of  securities  at  March  31,  1999  by
correspondence  with the custodian,  provide a reasonable  basis for the opinion
expressed above.

                                                      PricewaterhouseCoopers LLP

Kansas City, Missouri
May 7, 1999


                                                 www.americancentury.com      17


Share Class and Retirement Account Information
- --------------------------------------------------------------------------------

SHARE CLASSES

     Two classes of shares are authorized for sale by the fund: Investor Class
and Advisor Class.

      INVESTOR CLASS  shareholders  do not pay any commissions or other fees for
purchase  of fund shares  directly  from  American  Century.  Investors  who buy
Investor  Class  shares  through  a  broker-dealer  may be  required  to pay the
broker-dealer a transaction fee.

     ADVISOR  CLASS shares are sold  through  banks,  broker-dealers,  insurance
companies,  and financial advisors.  Advisor Class shares are subject to a 0.50%
Rule 12b-1  service and  distribution  fee. Half of that fee is available to pay
for recordkeeping and administrative  services, and half is available to pay for
distribution  services provided by the financial  intermediary through which the
Advisor Class shares are purchased. The total expense ratio of the Advisor Class
is 0.25% higher than the total expense ratio of the Investor Class.

     Both  classes  of  shares  represent  a pro rata  interest  in the fund and
generally have the same rights and preferences.

RETIREMENT ACCOUNT INFORMATION

     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 from the date of
receipt  at  American  Century.  Even if you plan to  rollover  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 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 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.


18      1-800-345-2021


Background Information
- --------------------------------------------------------------------------------

INVESTMENT PHILOSOPHY AND POLICIES

     American  Century offers 38 fixed-income  funds,  ranging from money market
portfolios  to long-term  bond funds and including  both taxable and  tax-exempt
funds. Each fund is managed to provide a "pure play" on a specific sector of the
fixed-income market. To ensure adherence to this principle,  the basic structure
of each fund's  portfolio  is tied to a specific  market  index.  Fund  managers
attempt  to add  value by making  modest  portfolio  adjustments  based on their
analysis of  prevailing  market  conditions.  Investment  decisions  are made by
management teams, which meet regularly to discuss market analysis and investment
strategies.

     In addition to these principles, each fund has its own investment policies:

     INFLATION-ADJUSTED  TREASURY  seeks to provide a total return and inflation
protection consistent with an investment in inflation-indexed  securities issued
by the U.S. Treasury. The fund has no average maturity limitations.  Fund shares
are not guaranteed by the U.S. government.

COMPARATIVE INDICES

     The  indices  listed  below  are used in the  report  for fund  performance
comparisons. They are not investment products available for purchase.

     The SALOMON BROTHERS TREASURY INDEX is an index of U.S. Treasury securities
with maturities greater than 10 years.

     The  SALOMON   BROTHERS  U.S.   INFLATION-LINKED   INDEX  is  an  index  of
inflation-linked U.S. Treasury securities.

[right margin]

INVESTMENT TEAM LEADERS
  PORTFOLIO MANAGER
     DAVE SCHROEDER


                                                 www.americancentury.com      19


Glossary
- --------------------------------------------------------------------------------

RETURNS

* 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.

* 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 15-16.

YIELDS

* 30-DAY SEC YIELD  represents net  investment  income earned by the fund over a
30-day period,  expressed as an annual percentage rate based on the fund's share
price at the end of the 30-day period. The fund's net investment income includes
both interest and the principal adjustment on inflation-indexed  securities. The
SEC yield  should be regarded  as an  estimate of the fund's rate of  investment
income,  and it may not equal the fund's actual income  distribution  rate,  the
income paid to a  shareholder's  account,  or the income  reported in the fund's
financial statements.

PORTFOLIO STATISTICS

* NUMBER OF SECURITIES -- the number of different securities held by the fund on
a given date.

*  WEIGHTED  AVERAGE  MATURITY  (WAM)  -- a  measure  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.

* AVERAGE  DURATION  -- another  measure of the  sensitivity  of a  fixed-income
portfolio to interest rate changes.  Duration is a time-weighted  average of the
interest and principal payments of the securities in a portfolio.

* EXPENSE RATIO -- the operating expenses of the fund, expressed as a percentage
of average net assets.  Shareholders pay an annual fee to the investment manager
for  investment  advisory  and  management  services.  The expenses and fees are
deducted from fund income, not from each shareholder account. (See Note 2 in the
Notes to Financial Statements.)

INVESTMENT TERMS

* BASIS POINT -- one  one-hundredth of a percentage point (or 0.01%).  100 basis
points  equal one  percentage  point (or 1%).  Basis  points are used to clearly
describe  interest rate changes.  For example,  if a news report  indicates that
interest  rates  rose  by 1%,  does  that  mean 1% of the  previous  rate or one
percentage  point?  It is more accurate to state that interest rates rose by 100
basis points.

* COUPON -- the stated interest rate of a security.

SECURITY TYPES

* U.S. TREASURY INFLATION-INDEXED SECURITIES (TIIS) -- debt securities issued by
the U.S. Treasury and backed by the direct "full faith and credit" pledge of the
U.S. government.  Inflation-indexed  bonds have lower interest rates than normal
Treasury   bonds  with   similar   maturities.   But  unlike   ordinary   bonds,
inflation-indexed  bonds'  principal  value is adjusted  regularly for inflation
based on the consumer price index. As a result,  the amount of interest paid out
changes with the principal adjustments.


20      1-800-345-2021


Glossary
- --------------------------------------------------------------------------------

                                                                    (Continued)

* U.S. GOVERNMENT AGENCY INFLATION-INDEXED SECURITIES -- similar to the Treasury
securities,  but issued by U.S. government agencies such as the Tennessee Valley
Authority.

FUND CLASSIFICATIONS

INVESTMENT OBJECTIVE

The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

* CAPITAL  PRESERVATION  -- Offers  taxable and tax-free  money market funds for
relative stability of principal and liquidity.

* INCOME -- Offers funds that can provide current income and competitive yields,
as well as a strong and stable  foundation and generally lower volatility levels
than stock funds.

* GROWTH & INCOME --  Offers  funds  that  emphasize  both  growth  and  income,
diversification,  varying  capitalization sizes, and different investment styles
and strategies.

* GROWTH -- Offers  funds with a focus on  capital  appreciation  and  long-term
growth,  generally providing high return potential with corresponding high price
fluctuation risk.

RISK

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that the fund's category may change over time. Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

*  CONSERVATIVE  -- these funds  generally  provide lower return  potential with
either low or minimal price fluctuation risk.

* MODERATE -- these funds  generally  provide  moderate  return  potential  with
moderate price fluctuation risk.

*  AGGRESSIVE  -- these  funds  generally  provide  high return  potential  with
corresponding high price fluctuation risk.


                                                 www.americancentury.com      21


Notes
- --------------------------------------------------------------------------------


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Notes
- --------------------------------------------------------------------------------


                                                 www.americancentury.com      23


Notes
- --------------------------------------------------------------------------------


24      1-800-345-2021


[inside back cover]

===============================================================================
INVESTMENT OBJECTIVE - CAPITAL PRESERVATION
===============================================================================

                  RISK LEVEL - CONSERVATIVE

TAXABLE MONEY MARKETS           TAX-FREE MONEY MARKETS

Premium  Capital Reserve        FL Municipal Money Market
Prime Money Market              CA Municipal Money Market
Premium Government Reserve      CA Tax-Free Money Market
Government Agency               Tax-Free Money Market
   Money Market
Capital Preservation

===============================================================================
INVESTMENT OBJECTIVE - INCOME
===============================================================================

                   RISK LEVEL - AGGRESSIVE

TAXABLE BONDS                   TAX-FREE BONDS

Target 2025*                    CA High-Yield Municipal
Target 2020*                    High-Yield Municipal
Target 2015*
Target 2010*
High-Yield
International Bond

                    RISK LEVEL - MODERATE

TAXABLE BONDS                   TAX-FREE BONDS

Long-Term Treasury              CA Long-Term Tax-Free
Target 2005*                    Long-Term Tax-Free
Bond                            CA Insured Tax-Free
Premium Bond

                   RISK LEVEL - CONSERVATIVE

TAXABLE BONDS                   TAX-FREE BONDS

Intermediate-Term Bond          CA Intermediate-Term Tax-Free
Intermediate-Term Treasury      AZ Intermediate-Term Municipal
GNMA                            FL Intermediate-Term Municipal
Inflation-Adjusted Treasury     Intermediate-Term  Tax-Free
Limited-Term Bond               CA Limited-Term  Tax-Free
Target 2000*                    Limited-Term Tax-Free
Short-Term Government
Short-Term Treasury

===============================================================================
INVESTMENT OBJECTIVE - GROWTH AND INCOME
===============================================================================

                     RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY

Small Cap Quantitative
Small Cap Value

                      RISK LEVEL - MODERATE

ASSET ALLOCATION/BALANCED       DOMESTIC EQUITY        SPECIALTY

Strategic Allocation --         Equity Growth          Utilities
   Aggressive                   Equity Index           Real Estate
Balanced                        Tax-Managed Value
Strategic Allocation --         Income & Growth
   Moderate                     Value
Strategic Allocation --         Equity Income
   Conservative

===============================================================================
INVESTMENT OBJECTIVE - GROWTH
===============================================================================

                      RISK LEVEL - AGGRESSIVE

DOMESTIC EQUITY                 SPECIALTY              INTERNATIONAL

New Opportunities               Global Gold            Emerging Markets
Giftrust(reg.tm)                                       International Discovery
Vista                                                  International Growth
Heritage                                               Global Growth
Growth
Ultra
Select

                       RISK LEVEL - MODERATE

SPECIALTY

Global Natural Resources


The investment  objective may be based on the fund's  objective as stated in its
prospectus or fund profile,  or the fund's  categorization by independent rating
organizations based on its management style.

The classification of funds by risk category is based on quantitative historical
measures as well as qualitative prospective measures. It is not intended to be a
precise  indicator  of future risk or return  levels.  The degree of risk within
each category can vary  significantly,  and some fund returns have  historically
been higher than more aggressive  funds or lower than more  conservative  funds.
Please be aware that a fund's  category may change over time.  Therefore,  it is
important  that you read a fund's  prospectus or fund profile  carefully  before
investing to ensure its  objectives,  policies and risk potential are consistent
with your needs.

For a definition of fund categories, see the Glossary.

*  While listed within the Income investment objective,  the Target funds do not
   pay current dividend income.  Income dividends are distributed once a year in
   December. The Target funds are listed in all three risk categories due to the
   dramatic  price  volatility  investors may  experience  during certain market
   conditions.  If held  to  their  target  dates,  however,  they  can  offer a
   conservative, dependable way to invest for a specific time horizon.

Please call for a prospectus  or profile on any  American  Century  fund.  These
documents contain important information including charges and expenses,  and you
should read them carefully before you invest or send money.


[back cover]

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

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

WWW.AMERICANCENTURY.COM

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

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX: 816-340-7962

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

BUSINESS, NOT-FOR-PROFIT, EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-3533

AMERICAN CENTURY GOVERNMENT INCOME TRUST

INVESTMENT MANAGER
AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.
KANSAS CITY, MISSOURI

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 Investments                                      BULK RATE
P.O. Box 419200                                               U.S. POSTAGE PAID
Kansas City, MO 64141-6200                                    AMERICAN CENTURY
www.americancentury.com                                           COMPANIES

9905                                                    Funds Distributor, Inc.
SH-BKT-16271                      (c)1999 American Century Services Corporation


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