AMERICAN CENTURY CALIFORNIA TAX FREE & MUNICIPAL FUNDS
N-30D, 1997-04-25
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                                   [BOOK ONE]


                                SEMIANNUAL REPORT

                            [american century logo]
                                    American
                                  Century(sm)

                                February 28, 1997

                                     BENHAM
                                      GROUP

                        California Tax-Free Money Market
                        California Municipal Money Market
                         California High-Yield Municipal
                           California Insured Tax-Free


                                 [front cover]


                               TABLE OF CONTENTS

Our Message to You...........................................1
Report Highlights............................................2
Period Overview..............................................4
Municipal Credit Review......................................5
California Tax-Free Money Market
   Performance & Portfolio Information.......................6
   Management Q & A..........................................7
   Schedule of Investments...................................9
   Financial Highlights.....................................45
California Municipal Money Market
   Performance & Portfolio Information......................14
   Management Q & A.........................................15
   Schedule of Investments..................................17
   Financial Highlights.....................................46
California High-Yield Municipal
   Performance & Portfolio Information......................21
   Management Q & A.........................................22
   Schedule of Investments..................................25
   Financial Highlights.....................................47
California Insured Tax-Free
   Performance & Portfolio Information......................30
   Management Q & A.........................................31
   Schedule of Investments..................................34
   Financial Highlights.....................................48
Statements of Assets and Liabilities........................38
Statements of Operations....................................39
Statements of Changes in Net Assets.........................40
Notes to Financial Statements...............................42
Background Information......................................52
Glossary....................................................53

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

                 American Century Investments--Family of Funds

        BENHAM GROUP          AMERICAN CENTURY GROUP     TWENTIETH CENTURY GROUP

     MONEY MARKET FUNDS          ASSET ALLOCATION &
    GOVERNMENT BOND FUNDS          BALANCED FUNDS            U.S. GROWTH FUNDS
   DIVERSIFIED BOND FUNDS     CONSERVATIVE EQUITY FUNDS     INTERNATIONAL FUNDS
    MUNICIPAL BOND FUNDS           SPECIALTY FUNDS
    California Tax-Free
        Money Market
    California Municipal
        Money Market
   California High-Yield
          Municipal
 California Insured Tax-Free

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

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


                                                    American Century Investments


                               OUR MESSAGE TO YOU

[photo of James E. Stowers III and James M. Benham]

The six months ended February 28, 1997,  were  eventful,  both for the municipal
bond market and our company.  Municipal bonds performed favorably overall during
the period,  despite some volatility in January as U.S. economic growth appeared
to accelerate.  In the following pages, our investment  management team provides
further details about the municipal  market and how your fund was managed during
the period.

Changing market conditions underscore the importance of quality investments. Our
commitment to  high-quality  securities is  exemplified  by the expansion of our
municipal credit research team. The five members of the team perform an in-depth
analysis on all securities considered for purchase by American Century municipal
money market and bond funds. The team has established a credit management system
that defines investment limits to cap our funds' exposure to individual issuers,
market sectors and geographical regions. The team plays an important role in the
management of the California Tax-Free and Municipal funds.

On the corporate  front, we completed the  operational  integration of Twentieth
Century and The Benham Group in September 1996. As a result, you now have direct
access to a broader spectrum of funds and services.

We also changed the name of our company.  On January 1, 1997,  we began  serving
you under the name American  Century  Investments,  which  reflects our expanded
identity and the independent  thinking  common to Twentieth  Century and Benham.
American  Century's fund family is divided into three groups--the  Benham Group,
the American  Century  Group and the Twentieth  Century  Group.  The  California
Tax-Free  and  Municipal  funds will remain in the Benham  Group  because  their
investment goal--current tax-free income--matches a key attribute of that group.

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

These are examples of how we continue to work to provide information and
services that are useful and convenient to investors in our funds. Thank you
for investing with us.

Sincerely,

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


Semiannual Report                                        Our Message to You    1


                               REPORT HIGHLIGHTS

PERIOD OVERVIEW

o    The U.S.  economy  grew more rapidly  than  expected  during the six months
     ended February 28, 1997.

o    Despite rapid economic expansion,  inflation remained tame. Consumer prices
     rose at a modest 3.1% annual rate for the six-month period.

o    The seemingly contradictory  combination of strong growth and low inflation
     was responsible for much of the market's uncertainty about possible changes
     in the Federal Reserve's interest rate policy.

o    Overall,  municipal  bond  investors  enjoyed  favorable  returns  for  the
     six-month period.

o    Low levels of new municipal issuance helped support the prices of municipal
     securities.

o    Shorter-maturity  municipals--more  sensitive  to  shifting  interest  rate
     policy  expectations--underperformed  longer-maturity municipals. 

MUNICIPAL CREDIT REVIEW

o    California's  strong  economic growth led to upgrades in the state's credit
     rating.

o    Specific  challenges,  such as Proposition  218 and federal welfare reform,
     could affect ratings of locally issued municipal bonds.

o    Overall,  our  outlook  for the  state's  credit  rating is very  positive.
     Continuing  economic  strength  should lead to further  upgrades during the
     coming year.

TAX-FREE MONEY MARKET

o    The fund  outperformed  its Lipper  peer group  average  for the six months
     ended February 28, 1997.

o    Going forward,  we will likely extend the fund's average  maturity,  but we
     will probably wait until one-year municipal yields become more attractive.

o    June and July,  when many California  municipalities  issue one-year notes,
     should  provide  our  best  opportunity  to  lengthen  the  fund's  average
     maturity.

MUNICIPAL MONEY MARKET

o    The fund  outperformed  its Lipper  peer group  average  for the six months
     ended February 28, 1997.

o    Because of changing  economic  conditions and low supply among  longer-term
     municipal money market securities, we shortened the fund's average maturity
     from 42 days to 23 days during the six-month period.

o    Going forward,  we will likely extend the fund's average  maturity,  but we
     will probably wait until one-year municipal yields become more attractive.

o    June and July,  when many California  municipalities  issue one-year notes,
     should  provide  the  best  opportunity  to  lengthen  the  fund's  average
     maturity.

                                    TAX-FREE
                                  MONEY MARKET

                         Total Returns:      AS OF 2/28/97
                           6 Months                 1.54%*
                           1 Year                    3.03%

                         Net Assets:        $431.6 million
                           (AS OF 2/28/97)

                         Inception Date:           11/9/83

                         Ticker Symbol:              BCTXX


                                   MUNICIPAL
                                  MONEY MARKET

                         Total Returns:      AS OF 2/28/97
                           6 Months                 1.51%*
                           1 Year                    3.04%

                         Net Assets:        $189.1 million
                           (AS OF 2/28/97)

                         Inception Date:          12/31/90

                         Ticker Symbol:              BNCXX

                         * Not annualized.

Many of the investment  terms in this report are defined in the Glossary on page
53.


2    Report Highlights                              American Century Investments


                               REPORT HIGHLIGHTS

HIGH-YIELD MUNICIPAL

o    The fund  outperformed  its Lipper  peer group  average  for the six months
     ended February 28, 1997.

o    High-yield municipals performed well as credit quality spreads continued to
     narrow during the period.

o    At the  end of the  period  the  fund's  duration  was  7.6  years--neutral
     compared  with the  average  duration of its peers.  We chose this  neutral
     stance in response to the  market's  uncertainty  about the  interest  rate
     outlook.

o    We anticipate that  continuing  strong economic growth will keep California
     municipal credit quality spreads very narrow,  and that limited issuance of
     lower-quality securities could result in more competition and higher prices
     for high-yield bonds.

o    With the possibility of higher interest rates going forward, we will likely
     maintain  the fund's  neutral  duration.  We will also look to increase the
     fund's  holdings in unrated bonds to about 35% of the  portfolio,  provided
     that we can find  securities  that  meet our  strict  credit  criteria  and
     represent good value.

TAX-FREE INSURED

o    The fund  outperformed  its Lipper  peer group  average  for the six months
     ended February 28, 1997.

o    Because of the market's  uncertainty  about the interest rate  outlook,  we
     kept  the  fund's  duration  at  around  eight  years.   This  conservative
     positioning was an important factor in the fund's favorable performance.

o    The  fund's   returns  were   enhanced  by  the  purchase  of   undervalued
     tax-allocation  bonds,  which  appreciated in value as California  property
     values rose.

o    With the possibility of higher interest rates going forward, we will likely
     maintain the fund's neutral duration.


                                   HIGH-YIELD
                                   MUNICIPAL

                         Total Returns:      AS OF 2/28/97
                           6 Months                 5.04%*
                           1 Year                    6.97%

                         Net Assets:        $168.9 million
                           (AS OF 2/28/97)

                         Inception Date:          12/30/86

                         Ticker Symbol:              BCHYX


                                    INSURED
                                    TAX-FREE

                         Total Returns:      AS OF 2/28/97
                           6 Months                 4.89%*
                           1 Year                    4.78%

                         Net Assets:        $189.9 million
                           (AS OF 2/28/97)

                         Inception Date:          12/30/86

                         Ticker Symbol:              BCINX

                         * Not annualized.


Semiannual Report                                         Report Highlights    3


                                PERIOD OVERVIEW

U.S. Economy

The U.S.  economy  expanded at a healthy clip during the six-month  period ended
February 28, 1997.  Fueling growth was low unemployment,  high employment growth
and a robust housing market that defied expectations of a slowdown. As a result,
the economy  expanded at a 2.1% annual rate during the third quarter of 1996 and
a 3.8%  annual rate during the fourth  quarter.  The  strength of the economy in
1997 has continued to surprise  analysts,  many of whom are predicting  that the
U.S. economy will grow by more than 3% during the first quarter.

While the economy  continued  its  impressive  growth rate,  inflation  remained
relatively  subdued.  Overall consumer  prices--as  measured by the government's
consumer  price  index--rose  at a modest 3.1% annual rate during the six months
ended February 28, 1997. This unusual combination of healthy economic growth and
low inflation sent mixed signals to U.S. bond investors.

California Municipal Bond Market

Municipal bond investors  enjoyed  favorable  returns for the six-month  period.
Nevertheless,  shifting expectations of an interest-rate increase by the Federal
Reserve (the Fed) kept investors  guessing about the possible  direction of bond
prices.

As demonstrated by the accompanying graph,  municipal yields peaked at the start
of the period amid strong expectations for higher interest rates. Investors were
concerned  that the U.S.  economy  was ready to  overheat  and spark  inflation.
However, inflation remained subdued, and signs of a moderating economy convinced
many that a Fed rate hike was unlikely,  allowing  municipal  bonds to rally. By
early  December,  prices  crested with the yield on 30-year  municipal  bonds at
5.29%, nearly half a percent lower than the 5.78% seen in early September.

However,  aided by strong consumer spending activity,  the economy  strengthened
again in early  1997.  With  growing  expectations  that the  strains  of robust
economic  growth  would  finally  force  the Fed to stage a  pre-emptive  strike
against  inflation,  investors  pushed  municipal  prices  lower.  By the end of
February, the yield on 30-year municipal bonds had risen to 5.44%.

Helping to support  municipal  prices during the volatile period were low levels
of new municipal issuance,  which only in recent months has reached historically
normal levels. An upsurge of demand from retail investors also buoyed short- and
intermediate-maturity  municipals during much of the period, but that beneficial
effect was largely  countered by shifting  expectations  for higher rates.  More
sensitive   to   anticipated   Fed   activities,   shorter-maturity   municipals
underperformed  their  longer-maturity  counterparts for the period.  Meanwhile,
strong demand from insurance  companies  helped buoy long-term  municipal prices
late in 1996 as many of these  companies  made  "crossover"  buys--that is, they
purchased municipal bonds instead of  comparable-maturity  Treasury bonds due to
the relatively attractive yield offered by municipals.

[line graph - data below]

                         Shifting Municipal Yield Curve

Years          9/5/96            12/3/96          2/28/97
0.25            3.51%             3.03%            3.22%
0.5             3.71              3.23             3.42
1               3.91              3.43             3.65
2               4.16              3.73             3.92
3               4.36              3.93              4.1
4               4.51              4.05             4.24
5               4.61              4.15             4.34
6               4.71              4.25             4.44
7               4.81              4.35             4.54
8               4.91              4.45             4.64
9               5.01              4.55             4.74
10              5.11              4.65             4.84
11              5.198             4.738            4.916
12              5.286             4.826            4.992
13              5.374             4.914            5.068
14              5.462             5.002            5.144
15              5.55              5.09             5.22
16              5.584             5.118            5.252
17              5.618             5.146            5.284
18              5.652             5.174            5.316
19              5.686             5.202            5.348
20              5.72              5.23             5.38
21              5.728             5.238            5.388
22              5.736             5.246            5.396
23              5.744             5.254            5.404
24              5.752             5.262            5.412
25              5.76              5.27             5.42
26              5.764             5.274            5.424
27              5.768             5.278            5.428
28              5.772             5.282            5.432
29              5.776             5.286            5.436
30              5.78              5.29             5.44

Source: Bloomberg Financial Markets


4    Period Overview                                American Century Investments


                            MUNICIPAL CREDIT REVIEW

As we  anticipated  early in 1996, the state of  California's  credit rating was
upgraded by several rating agencies within the last year. The key to the state's
improving  credit quality has been its ability to generate  strong job growth in
various sectors of the economy.  The six months ended February 28, 1997,  showed
an  acceleration of the economic growth that California has enjoyed for the past
three years.  With income gains and  employment  growth  exceeding  the national
average,  California's  unemployment  rate fell to 6.5% for the first time since
1990 (see the  accompanying  graph).  The state has more than  recovered all the
jobs  lost  in  the  last  recession,  largely  due  to  strong  growth  in  the
high-technology industries.

California is also the nation's leading  exporter,  with exports nearly equaling
those of the other 49 states combined. Its gross product is projected to surpass
$1 trillion in 1997,  a milestone  that the U.S. as a whole  passed less than 30
years ago.

The state's  finances  continue to improve--its  revenue is projected to be more
than $700 million  over budget for the  1996-1997  fiscal year,  and the general
fund is expected to show a reserve for the first time in a number of years.

The state's  strongest  growth has been  centered in the San Francisco Bay Area,
led by Santa  Clara  County,  the hub of the  state's  thriving  high-technology
industry.  Southern  California's economy also continued to expand,  though at a
slower pace.

There has also been statewide  improvement  in the real estate  sector.  The San
Francisco Bay Area has seen property values rise appreciably, while the Southern
California  real estate market has bottomed out and begun to trend upward.  Real
estate prices in some regions have surpassed their 1989 highs,  underscoring the
regional vitality of California's real estate market.

In spite of the state's rosy economic outlook,  specific  challenges continue to
affect the credit  picture for locally  issued  municipal  bonds.  For  example,
California's Proposition 218 requires voter approval for the levying of fees and
other  charges by local  governments.  This could have a negative  impact on the
credit quality of securities  issued by local  governments  within the state. In
addition,  federal  welfare  reform could place  additional  credit  pressure on
already-burdened  county  budgets.  This  possibility has led us to position our
California municipal funds with very low exposure to county debt.

With these  issues in mind,  we have  continued to expand our  municipal  credit
research  team.  The five members of the team keep a close watch on economic and
legislative  trends  within  the state and  thoroughly  research  all  municipal
securities  considered  for  purchase  by the  Benham  California  Tax-Free  and
Municipal funds.

We will continue to monitor legislative developments on welfare reform and state
budgetary  issues in the months  ahead.  Overall,  our  outlook  for the state's
credit  rating  remains  very  positive,  and we feel that  continuing  economic
strength will lead to further credit upgrades within the next 12 months.

[line graph - data below]

           California Unemployment

1/31/90              5.0%
2/28/90              5.1
3/31/90              5.2
4/30/90              5.4
5/31/90              5.4
6/30/90              5.5
7/31/90              5.6
8/31/90              5.8
9/30/90              6.1
10/31/90             6.4
11/30/90             6.8
12/31/90             6.9
1/31/91              7.0
2/28/91              7.4
3/31/91              7.7
4/30/91              7.8
5/31/91              7.7
6/30/91              7.7
7/31/91              7.8
8/31/91              7.7
9/30/91              7.8
10/31/91             7.9
11/30/91             8.0
12/31/91             8.2
1/31/92              8.4
2/29/92              9.0
3/31/92              8.9
4/30/92              9.0
5/31/92              9.1
6/30/92              9.3
7/31/92              9.4
8/31/92              9.6
9/30/92              9.7
10/31/92             9.7
11/30/92             9.7
12/31/92             9.7
1/31/93              9.7
2/28/93              9.6
3/31/93              9.5
4/30/93              9.3
5/31/93              9.4
6/30/93              9.4
7/31/93              9.3
8/31/93              9.3
9/30/93              9.3
10/31/93             9.3
11/30/93             9.3
12/31/93             9.2
1/31/94              9.2
2/28/94              9.3
3/31/94              9.0
4/30/94              8.8
5/31/94              8.9
6/30/94              8.7
7/31/94              8.6
8/31/94              8.5
9/30/94              8.3
10/31/94             8.1
11/30/94             7.9
12/31/94             7.8
1/31/95              8.1
2/28/95              7.8
3/31/95              7.8
4/30/95              7.9
5/31/95              7.9
6/30/95              7.8
7/31/95              7.8
8/31/95              7.8
9/30/95              7.8
10/31/95             7.8
11/30/95             7.9
12/31/95             7.8
1/31/96              7.6
2/29/96              7.6
3/31/96              7.5
4/30/96              7.4
5/31/96              7.3
6/30/96              7.2
7/31/96              7.1
8/31/96              7.1
9/30/96              7.1
10/31/96             7.0
11/30/96             6.9
12/31/96             6.8
1/31/97              6.9
2/28/97              6.5

Source: DRI/McGraw Hill


Semiannual Report                                   Municipal Credit Review    5

<TABLE>
<CAPTION>
                        CALIFORNIA TAX-FREE MONEY MARKET

                                                7-DAY        7-DAY             7-DAY TAX-EQUIVALENT YIELDS
                                              CURRENT    EFFECTIVE        34.70%       37.42%       41.95%       45.22%
                                                YIELD        YIELD   Tax Bracket  Tax Bracket  Tax Bracket  Tax Bracket
                                                -----        -----   -----------  -----------  -----------  -----------

CURRENT YIELD (as of February 28, 1997)
California Tax-Free
<S>                                             <C>          <C>           <C>          <C>          <C>          <C>  
Money Market                                    2.93%        2.98%         4.49%        4.68%        5.05%        5.35%

Yields are defined in the Glossary on page 53.
</TABLE>

<TABLE>
                                                                                AVERAGE ANNUAL RETURNS
                                                          6 MONTHS        1 YEAR      3 YEARS      5 YEARS     10 YEARS
TOTAL RETURNS (as of February 28, 1997)
<S>                                                          <C>           <C>          <C>          <C>          <C>  
California Tax-Free Money Market ..........................  1.54%         3.03%        3.03%        2.69%        3.67%
Average California Tax-Exempt
Money Market Fund(1) ......................................  1.43%         2.86%        2.93%        2.63%        3.71%
Fund's Ranking Among California
Tax-Exempt Money Market Funds(1) ..........................   --     14 out of 54  13 out of 47  14 out of 43   6 out of 9

(1)  According to Lipper Analytical Services.

See pages 52-53 for more information about returns and Lipper fund rankings.
</TABLE>

PORTFOLIO AT A GLANCE

                                 2/28/97          8/31/96
Number of Securities               88               91
Weighted Average Maturity        28 days          39 days
Expense Ratio                    0.48%*            0.49%

* Annualized.

Money market funds are neither  insured nor  guaranteed by the U.S.  government.
Yields will fluctuate,  and there can be no assurance that the fund will be able
to maintain a stable $1.00 share price.


6    California Tax-Free Money Market               American Century Investments


                        CALIFORNIA TAX-FREE MONEY MARKET

MANAGEMENT Q&A

An interview with Todd Pardula,  a portfolio manager on the California  Tax-Free
and Municipal funds management team.

How did the fund perform?

The fund  continued  to  outperform  its peer group  average  while  meeting its
investment  objective of providing  tax-exempt  income. For the six months ended
February 28, 1997, the fund had a total return of 1.54%, compared with the 1.43%
average return of the 56 "California  Tax-Exempt  Money Market Funds" tracked by
Lipper  Analytical  Services.  (See the Total Returns table on the previous page
for other fund performance comparisons.)

The fund's average maturity shortened over the past six months. Why?

We  shortened  the  fund's  average  maturity  because  of  prevailing  economic
conditions.  The U.S.  economy has experienced  strong  employment  growth,  but
inflation  has  remained  low.  These  conditions   rarely  co-exist  for  long;
eventually,  something  has to give.  We  expect to see wage  pressures  lead to
rising inflation,  which in turn would likely lead to a short-term interest rate
increase by the Federal Reserve.

Despite these expectations, we planned to extend the fund's maturity slightly in
December  by  taking  advantage  of the  usual  year-end  rise in the  yields of
short-term  municipal  securities (a result of selling by corporations that wish
to "dress up" their  balance  sheets  with  Treasury  securities  at  year-end).
However,  this seasonal effect was less dramatic than in past years.  So, rather
than buy  securities  with  unattractive  yields,  we allowed the fund's average
maturity to shorten  further.  By the end of the  six-month  period,  the fund's
average maturity of 28 days was about two weeks shorter than that of the average
California tax-exempt money market fund.

Has the supply of California municipal money market securities had any effect on
your management of the fund?

Yes,  and that's  another  reason why the fund's  maturity has been shorter than
normal.  We typically  invest a majority of the fund's  assets in  variable-rate
demand  notes  (VRDNs)  that reset  their rates on a daily or weekly  basis.  We
balance these  short-term  investments with  longer-term  municipal  securities,
which generally have maturities of 8-13 months.

However, a shortage of credit-approved  one-year California municipal securities
has made yields in this maturity sector  unattractive  compared to Treasurys and
other short-term  tax-exempt  securities.  As a result,  we've been focusing the
fund's  investments in municipal  commercial  paper,  VRDNs and other short-term
securities.  This  situation  has  contributed  to the  fund's  shorter  average
maturity.

[pie charts - data described below]

PORTFOLIO  COMPOSITION  BY SECURITY TYPE (as of 2/28/97) 
o    VRDNs 75% 
o    Bonds less than 1 Year 11% 
o    Municipal Notes 7% 
o    Commerical Paper 7%

PORTFOLIO COMPOSITION BY SECURITY TYPE (as of 8/31/96) 
o    VRDNs 76% 
o    Municipal Notes 9% 
o    Bonds less than 1 Year 7% 
o    Commercial Paper 4% 
o    Put Bonds 4%


Semiannual Report                          California Tax-Free Money Market    7


                        CALIFORNIA TAX-FREE MONEY MARKET

Looking ahead, what are your plans for the fund over the next six months?

We will likely  extend the fund's  average  maturity  at some  point,  but we're
willing to wait until  one-year  municipal  yields become more  attractive.  The
Federal  Reserve  has given us  another  reason  to  wait--in  March,  it made a
pre-emptive strike against inflation by raising short-term  interest rates. Many
Fed watchers suspect this may be the first in a series of rate hikes.

But our  decision  to  extend  the  fund's  maturity  will  also be based on the
relative values between VRDNs and longer-term municipal money market securities.
To make this  determination,  we project  VRDN  rates  over the coming  year and
compare our results to current rates on one-year municipal  securities.  We then
invest in whichever offers the higher yield.  Lately, VRDNs have been the better
buy, but we expect seasonal  supply factors to favor one-year  securities in the
coming months.

Can you describe some of these seasonal factors?

The next seasonal  opportunity  for us to extend the fund's  maturity is late in
April,  when many  tax-exempt  money market funds sell  securities  to meet cash
outflows as investors pay their tax bills.  But the best  opportunity will occur
in June and July, when many California municipalities issue a substantial amount
of one-year notes.  We'll  definitely look to extend the fund's average maturity
at that time; how far we extend will depend on economic  conditions and relative
values.  If  economic  growth is  projected  to slow,  we may  extend the fund's
maturity  out to 60 days or  more,  but we  would  be less  enthusiastic  if the
economy continued to strengthen.

How does credit research affect your management of the fund?

When it comes to security selection,  our municipal credit research team plays a
vital role. The team has set stringent guidelines and is proactive about keeping
the management team apprised of changing  credit  conditions.  Our  relationship
represents a good balance between yield and credit  quality--the fund management
team seeks out the most attractive  yields within the rigorous credit  standards
established by our credit research group.

[pie charts - data described below]

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 2/28/97)
SP1+ 70%
SP1 30%

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 8/31/96)
SP1+ 77%
SP1 23%


8    California Tax-Free Money Market               American Century Investments


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA TAX-FREE MONEY MARKET

FEBRUARY 28, 1997 (UNAUDITED)

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

MUNICIPAL SECURITIES

$ 4,445,540   Agoura Hills Multifamily Housing
              Rev., (Oakridge Apartments),
              VRDN, 3.45%, 3-5-97 (LOC:
              Continental Casualty Co.)                          $4,445,540
  4,000,000   Anaheim Electric Rev., 4.25%,
              10-1-97 (AMBAC)                                     4,009,044
  4,800,000   Anaheim Housing Auth. Rev.,
              Series A, (Heritage Village
              Apartments), VRDN, 3.35%,
              3-6-97 (LOC: Barclays
              Bank PLC)                                           4,800,000
 10,480,000   Association of Bay Area
              Governments Financing Auth., VRDN, 
              3.30%, 3-6-97 (LOC:
              Union Bank of Switzerland)                         10,480,000
    100,000   Association of Bay Area
              Governments Lease Rev.
              Certificates of Participation,
              (Pooled Projects), VRDN, 3.15%,
              3-6-97 (LOC: National
              Westminster Bank PLC)                                 100,000
  8,100,000   Auburn Unified School District
              Certificates of Participation,  
              Series 1993, (Capital  Improvement
              Financing Project), VRDN, 3.40%, 
              3-6-97 (LOC:Union Bank of California)               8,100,000
  7,800,000   Azusa Multifamily Housing Rev.,
              (Pacific Glen Apartments), VRDN, 
              3.50%, 3-6-97 (LOC:
              Continental Casualty Co.)                           7,800,000
  2,000,000   California GO Commercial Paper,
              3.40%, 3-3-97 (LOC:
              Landbank Hessen-Thuringen
              Girozentrale, Westdeutsche
              Landesbank Girozentrale)                            2,000,000
  1,015,000   California Health Facilities
              Financing Auth. Rev.,
              Series A, (Pooled Loan Program),
              VRDN, 3.30%, 3-6-97 (LOC:
              Rabobank Nederland)                                 1,015,000
  6,000,000   California Health Facilities
              Financing Auth. Rev., Series
              1985 B, (Scripps Memorial
              Hospital), VRDN, 3.30%, 3-6-97
              (MBIA) (SBBPA: Morgan
              Guaranty Trust Co.-New York)                        6,000,000

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

$2,500,000    California Health Facilities
              Financing Auth. Rev., Series
              1990 A, (Pooled Project), VRDN,
              3.30%, 3-5-97 (LOC: Rabobank
              Nederland)                                       $  2,500,000
  1,500,000   California Pollution Control
              Financing Auth. Rev., Series B,
              (Southern California Edison),
              VRDN, 3.15%, 3-3-97                                 1,500,000
 10,500,000   California Pollution Control
              Financing Auth. Rev., (Chevron
              USA, Inc. Project), 3.70%,
              5-15-97 (Guaranteed: Chevron
              Corporation)                                       10,500,000
  1,000,000   California Pollution Control
              Financing Auth. Rev., (Chevron
              USA, Inc. Project), 3.90%,
              11-15-97 (Guaranteed: Chevron
              Corporation)                                        1,000,000
  3,000,000   California Pollution Control Rev.
              Commercial Paper, (Pacific Gas
              & Electric), 3.45%, 3-3-97
              (LOC: Morgan Guaranty
              Trust Co.-New York)                                 3,000,000
  4,000,000   California Pollution Control Rev.
              Commercial Paper, (Pacific Gas
              & Electric), 3.40%, 3-20-97
              (LOC: Morgan Guaranty
              Trust Co.-New York)                                 4,000,000
  7,500,000   California Pollution Control Rev.
              Commercial Paper, (Pacific Gas
              & Electric), 3.45%, 5-1-97
              (LOC: Morgan Guaranty
              Trust Co.-New York)                                 7,500,000
  5,000,000   California Public Capital
              Improvements Financing Auth.
              Rev., Series C, 3.65%, 3-15-97
              (LOC: National Westminster
              Bank PLC)                                           5,000,000
 18,500,000   California Rev. Anticipation Notes,
              4.50%, 6-30-97                                     18,531,471
 10,000,000   California School Cash Reserve
              Program Auth. Notes, Series A,
              4.75%, 7-2-97 (MBIA)                               10,026,235
  8,000,000   California Statewide Certificates of
              Participation, (Covenant
              Retirement Community), VRDN,
              3.25%, 3-6-97 (LOC: LaSalle
              National Bank)                                      8,000,000

See Notes to Financial Statements

Semiannual Report                          California Tax-Free Money Market    9


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA TAX-FREE MONEY MARKET

FEBRUARY 28, 1997 (UNAUDITED)

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

$ 3,000,000   California Statewide Communities
              Apartment Development Auth.
              Rev., Series A-1, VRDN, 3.15%,
              3-5-97 (FNMA Collateral
              Agreement)                                       $  3,000,000
  3,000,000   California Statewide Communities
              Apartment Development Auth.
              Rev., (Whispering Winds
              Apartments), VRDN, 3.45%,
              3-5-97 (LOC: Continental
              Casualty Co.)                                       3,000,000
  2,445,000   Central Unified School District
              Certificates of Participation, VRDN, 
              3.50%, 3-5-97 (LOC:
              Union Bank of California)                           2,445,000
  1,000,000   Countywide Public Financing Auth.
              Rev. Certificates of Participation,
              4.10%, 8-1-97 (MBIA)                                1,000,810
  2,700,000   Covina Redevelopment Agency
              Multifamily Housing Rev.,
              (Shadowhills Apartments), VRDN,
              3.50%, 3-6-97 (LOC: Continental
              Casualty Co.)                                       2,700,000
  2,155,000   Dinuba Financing Auth. Lease Rev.
              Certificates of Participation,
              Series A, (Wastewater Treatment
              Plant), VRDN, 3.50%, 3-5-97
              (LOC: Union Bank of California)                     2,155,000
  4,450,000   Gardena Financing Agency Rev.,
              (Public Parking Project), VRDN,
              3.55%, 3-6-97 (LOC: Industrial
              Bank of Japan)                                      4,450,000
  1,000,000   Glendale Industrial Development
              Auth., (Reliance Development), 
              VRDN, 3.35%, 3-14-97 (LOC:
              Barclays Bank PLC)                                  1,000,000
  6,355,000   Hanford Public Improvement
              Project, VRDN, 3.45%, 3-6-97
              (LOC: Union Bank of California)                     6,355,000
 12,100,000   Hayward Multifamily Housing Rev.,
              (Shorewood Apartments), VRDN,
              3.15%, 3-6-97 (LOC: FGIC)                          12,100,000
  5,400,000   Irvine Improvement Board
              Assessment, Series A, (District
              95-12), VRDN, 3.35%, 3-3-97
              (LOC: Kredietbank N.V.)                             5,400,000

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

$ 4,530,000   Irvine Industrial Development
              Authority Rev., (Shimano Amer
              Corporation), VRDN, 3.70%,
              3-5-97 (LOC: Bank of Tokyo-
              Mitsubishi)                                      $  4,530,000
  8,000,000   Kern County Superintendent of
              Schools Certificates of
              Participation, VRDN, 3.40%,
              3-6-97 (LOC: Anchor National
              Life Ins.)                                          8,000,000
  2,900,000   Lancaster Redevelopment Agency,
              (Woodacre Garden Apartments), 
              VRDN, 3.40%, 3-4-97 (LOC:
              Bank of Tokyo-Mitsubishi)                           2,900,000
  3,250,000   Lancaster Redevelopment Agency,
              (20th Street), VRDN, 3.20%,
              3-6-97 (LOC: FHLB)                                  3,250,000
  2,100,000   Lemore Certificates of Participation,
              Series 1995, (Golf Course
              Project), VRDN, 3.50%, 3-6-97
              (LOC: Union Bank of California)                     2,100,000
  5,200,000   Livermore Certificates of
              Participation, (Reverse Osmosis
              Project), VRDN, 3.25%, 3-6-97
              (LOC: National Westminster
              Bank PLC)                                           5,200,000
  3,000,000   Loma Linda Water Rev., VRDN,
              3.50%, 3-5-97 (LOC: Union
              Bank of California)                                 3,000,000
  5,000,000   Long Beach Multifamily Housing
              Rev., (Channel Point Apartments), 
              VRDN, 3.30%, 3-5-97 (LOC:
              Union Bank of California)                           5,000,000
  5,000,000   Los Angeles Community
              Redevelopment Agency, VRDN,
3.25%, 3-6-97 (LOC: Barclays
              Bank PLC)                                           5,000,000
  5,000,000   Los Angeles County Tax and Rev.
              Anticipation Notes, Series A,
              4.50%, 6-30-97 (LOC: Bank of
              America, Credit Suisse, Morgan
              Guaranty Trust Co.-New York,
              Union Bank of Switzerland,
              Westdeutsche Landesbank
              Girozentrale)                                       5,010,372

See Notes to Financial Statements


10   California Tax-Free Money Market          American Century Investments


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA TAX-FREE MONEY MARKET


FEBRUARY 28, 1997 (UNAUDITED)

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

$ 2,750,000   Los Angeles Public Works
              Financing Auth. Lease Rev.
              Certificates of Participation,
              Series A, 4.50%, 9-1-97 (MBIA)                   $  2,758,752
  3,300,000   Los Angeles Public Works
              Financing Auth. Lease Rev.
              Certificates of Participation,
              Series B, 4.50%, 9-1-97 (MBIA)                      3,309,859
  1,355,000   Los Angeles Unified School
              District Certificates of
              Participation, 3.80%, 10-1-97
              (FSA)                                               1,354,586
  9,500,000   Los Angeles Wastewater
              Commercial Paper, 3.45%,
              5-9-97 (LOC: Morgan Guaranty
              Trust Co.-New York, Union
              Bank of Switzerland)                                9,500,000
  8,500,000   Oceanside Multifamily Housing Rev.
              Refunding, (Lakeridge
              Apartments Project), VRDN,
              3.50%, 3-5-97 (LOC: Continental
              Casualty Co.)                                       8,500,000
 18,500,000   Orange County Apartment
              Development Rev., (Bear Brand
              Apartments), VRDN, 3.25%,
              3-6-97 (LOC: Credit Suisse)                        18,500,000
  4,000,000   Orange County Apartment
              Development Rev., (Seaside
              Meadows), VRDN, 3.25%,
              3-6-97 (LOC: Credit Suisse)                         4,000,000
  6,500,000   Orange County Apartment
              Development, Series 1991 A,
              (The Lakes Project), VRDN,
              3.20%, 3-6-97 (LOC: Citibank)                       6,500,000
  3,000,000   Orange County Housing Auth.
              Apartment Development Rev., 
              VRDN, 3.35%, 3-5-97 (LOC:
              Bank of America)                                    3,000,000
  2,000,000   Orange County Water Commercial
              Paper, 3.40%, 3-3-97 (LOC:
              Union Bank of Switzerland)                          2,000,000
  8,700,000   Orange County Water Commercial
              Paper, 3.40%, 4-10-97 (LOC:
              Union Bank of Switzerland)                          8,700,000
    800,000   Palm Springs Redevelopment
              Agency Certificates of
              Participation, VRDN, 3.30%,
              3-5-97 (LOC: Citibank)                                800,000

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

$ 6,100,000   Pico Rivera Certificates of
              Participation, (Redevelopment
              Agency Project), VRDN, 3.20%,
              3-4-97 (LOC: Wachovia Bank of
              Georgia)                                         $  6,100,000
  6,000,000   Redlands Certificates of
              Participation, (Sewer Treatment
              Facilities Project), VRDN, 3.25%,
              3-5-97 (LOC: FGIC)                                  6,000,000
  6,860,000   Redlands Certificates of
              Participation, (Water Facilities
              Project), VRDN, 3.25%, 3-5-97
              (LOC: FGIC)                                         6,860,000
  6,040,000   Riverside County Multifamily
              Housing Rev., (Ambergate
              Apartments), VRDN, 3.40%,
              3-6-97 (LOC: Union Bank of
              California)                                         6,040,000
  1,715,000   Rohnert Park Multifamily Housing
              Rev., (Crossbrook Apartments),
              VRDN, 3.15%, 3-5-97 (FNMA
              Collateral Agreement)                               1,715,000
  1,330,000   Sacramento County Certificates of
              Participation, 4.00%, 2-1-98
              (MBIA)                                              1,334,180
  5,000,000   Sacramento County Housing Auth.,
              VRDN, 3.35%, 3-5-97 (LOC:
              Dai-Ichi Kangyo Bank)                               5,000,000
  8,200,000   Sacramento County Multifamily
              Housing Rev., (River Oaks), 
              VRDN, 3.40%, 3-6-97 (LOC:
              Dai-Ichi Kangyo Bank)                               8,200,000
  3,400,000   Sacramento County Multifamily
              Housing Rev., Series A, VRDN,
              3.20%, 3-5-97 (LOC: California
              State Teachers Retirement
              System)                                             3,400,000
  1,500,000   Sacramento County Multifamily
              Housing Rev., Series 1985 C, 
              VRDN, 3.40%, 3-6-97 (LOC:
              Dai-Ichi Kangyo Bank)                               1,500,000
  3,200,000   San Bernardino County Certificates
              of Participation, VRDN, 3.45%,
              3-6-97 (LOC: Sumitomo Bank
              Ltd.)                                               3,200,000
 10,000,000   San Bernardino County Certificates
              of Participation, VRDN, 3.55%,
              3-6-97 (SBBPA: Merrill Lynch
              & Co., Inc.) (MBIA)                                10,000,000

See Notes to Financial Statements


Semiannual Report                          California Tax-Free Money Market   11


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA TAX-FREE MONEY MARKET

FEBRUARY 28, 1997 (UNAUDITED)

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

$12,300,000   San Bernardino Multifamily Housing
              Rev., Series A, (Castle Park
              Apartments), VRDN, 3.55%,
              3-5-97 (LOC: Bank of Tokyo-
              Mitsubishi)                                       $12,300,000
  1,370,000   San Diego County Multifamily
              Housing Rev., (Country Hills),
              VRDN, 3.20%, 3-5-97 (FNMA
              Collateral Agreement)                               1,370,000
  2,110,000   San Diego Multifamily Housing
              Rev., (Nobel Court
              Apartments), VRDN, 3.20%,
              3-6-97 (LOC: Credit Suisse)                         2,110,000
  4,300,000   San Diego Multifamily Housing
              Rev., Series A, (Coral Point
              Apartments), VRDN, 3.50%,
              3-6-97 (LOC: Continental
              Casualty Co.)                                       4,300,000
  2,510,000   San Diego Regional Transportation
              Commission Sales Tax Rev.,
              Series A, 4.00%, 4-1-97 (FGIC)                      2,511,031
  4,900,000   San Francisco City and County
              Redevelopment Financing Auth.
              Rev., (Yerba Buena Garden),
              VRDN, 3.20%, 3-5-97
              (LOC: National Westminster
              Bank PLC)                                           4,900,000
  1,400,000   San Jose Financing Auth. Rev.,
              Series B, (Hayes Mansion
              Project), VRDN, 3.35%, 3-5-97
              (LOC: Sumitomo Bank Ltd.)                           1,400,000
  3,900,000   San Leandro Multifamily Housing
              Rev., (Parkside Project), VRDN,
              3.20%, 3-5-97 (FNMA Collateral
              Agreement)                                          3,900,000
  4,200,000   Santa Clara Multifamily Housing
              Rev., VRDN, 3.25%, 3-5-97
              (LOC: National Westminster
              Bank PLC)                                           4,200,000
  4,200,000   Santa Clara Multifamily Housing
              Rev., (Foxchase Apartments), VRDN, 
              3.15%, 3-6-97 (LOC:FGIC)                            4,200,000
  7,300,000   Santa Paula Public Financing Auth.
              Rev. Certificates of Participation,
              Series 1996, VRDN, 3.50%,
              3-5-97 (LOC: Sumitomo Bank
              Ltd., Union Bank of California)                     7,300,000

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

$   300,000   South San Francisco Certificates
              of Participation, (Quality Control
              Plant Project), VRDN, 3.25%,
              3-6-97 (LOC: National
              Westminster Bank PLC)                            $    300,000
 18,800,000   Southern California Public Power
              Auth. Rev., VRDN, 3.10%,
              3-5-97 (FSA) (SBBPA: Morgan
              Guaranty Trust Co.-NewYork)                        18,800,000
  2,745,000   Southern California Public Power
              Auth. Rev., Series B,
              (Transmission Project), 4.00%,
              7-1-97 (MBIA)                                       2,745,389
  2,000,000   State of California GO, VRDN,
              3.35%, 3-6-97 (FGIC) (SBBPA:
              Merrill Lynch & Co., Inc.)                          2,000,000
  5,400,000   Three Valleys Municipal Water
              District Certificates of
              Participation, (Miramar Water
              Treatment), VRDN, 3.40%,
              3-5-97 (LOC: Barclays Bank PLC)                     5,400,000
  1,600,000   Triunfo Sanitation District Refunding
              Rev., VRDN, 3.50%, 3-5-97
              (LOC: Banque National de Paris)                     1,600,000
    825,000   Upland Community Redevelopment
              Agency Multifamily Housing Rev.,
              (Northwoods Project), VRDN,
              3.80%, 3-5-97 (LOC: Sanwa
              Bank)                                                 825,000
  6,300,000   Victor Valley Community College
              Certificates of Participation,
              VRDN, 3.40%, 3-6-97 (LOC:
              Banque National de Paris,
              Dai-Ichi Kangyo Bank)                               6,300,000
  1,000,000   Visalia Public Financing Auth.
              Certificates of Participation,
              VRDN, 3.20%, 3-6-97 (LOC:
              California State Teachers
              Retirement System)                                  1,000,000
  2,600,000   West Sacramento Financing Auth.
              Special Tax Rev., Series C, VRDN, 3.30%, 3-6-97 (LOC:
              Wells Fargo & Co.)                                  2,600,000
                                                                  ---------

TOTAL INVESTMENT SECURITIES--100.0%                            $426,237,269
                                                                ===========

See Notes to Financial Statements

12   California Tax-Free Money Market               American Century Investments


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA TAX-FREE MONEY MARKET

FEBRUARY 28, 1997 (UNAUDITED)

Notes to Schedule of Investments 
AMBAC = AMBAC Indemnity Corp.
FGIC = Financial Guaranty Insurance Company 
FHLB = Federal Home Loan Banks 
FNMA = Federal National Mortgage Association 
FSA = Financial Security Association 
GO = General Obligation  
LOC = Letter of Credit  
MBIA = Municipal Bond Insurance Association 
SBBPA = Standby Bond Purchase Agreement
VRDN = Variable Rate Demand Note.  Interest  reset date is indicated and used in
calculating the weighted  average  portfolio  maturity.  Rate shown is effective
February 28, 1997.

See Notes to Financial Statements


Semiannual Report                          California Tax-Free Money Market   13

<TABLE>
<CAPTION>
                        CALIFORNIA MUNICIPAL MONEY MARKET

                                       7-DAY         7-DAY            7-DAY TAX-EQUIVALENT YIELDS
                                     CURRENT     EFFECTIVE       34.70%       37.42%       41.95%       45.22%
                                       YIELD         YIELD  Tax Bracket  Tax Bracket  Tax Bracket  Tax Bracket
                                       -----         -----  -----------  -----------  -----------  -----------

CURRENT YIELD (as of February 28, 1997)
California Municipal
<S>                                    <C>           <C>          <C>          <C>          <C>          <C>  
Money Market                           2.95%         2.99%        4.52%        4.71%        5.08%        5.39%

Yields are defined in the Glossary on page 53.
</TABLE>

<TABLE>
                                                                      AVERAGE ANNUAL RETURNS
                                                  6 MONTHS       1 YEAR      3 YEARS      5 YEARSLIFE OF FUND(1)
                                                  --------       ------      -------      ----------------------
TOTAL RETURNS (as of February 28, 1997)
<S>                                                  <C>          <C>          <C>          <C>          <C>  
California Municipal Money Market                    1.51%        3.04%        3.08%        2.81%        3.11%
Average California Tax-Exempt
Money Market Fund(2)                                 1.43%        2.86%        2.93%        2.63%        2.88%
Fund's Ranking Among California
Tax-Exempt Money Market Funds(2)                      --   13 out of 54  11 out of 47  8 out of 43  9 out of 37
(1)  Inception date was December 31, 1990.
(2)  According to Lipper Analytical Services.

See pages 52-53 for more information about returns and Lipper fund rankings.
</TABLE>

PORTFOLIO AT A GLANCE
                                 2/28/97          8/31/96
Number of Securities               62               61
Weighted Average Maturity        23 days          42 days
Expense Ratio                    0.51%*            0.53%

* Annualized.

Money market funds are neither  insured nor  guaranteed by the U.S.  government.
Yields will fluctuate,  and there can be no assurance that the fund will be able
to maintain a stable $1.00 share price.


14   California Municipal Money Market              American Century Investments


                       CALIFORNIA MUNICIPAL MONEY MARKET

Management Q & A

An interview with Todd Pardula,  a portfolio manager on the California  Tax-Free
and Municipal funds management team.

How did the fund perform?

The fund  continued  to  outperform  its peer group  average  while  meeting its
investment  objective of providing  tax-exempt  income. For the six months ended
February 28, 1997, the fund had a total return of 1.51%, compared with the 1.43%
average return of the 56 "California  Tax-Exempt  Money Market Funds" tracked by
Lipper  Analytical  Services.  (See the Total Returns table on the previous page
for other fund performance comparisons.)

The fund's average maturity  shortened  significantly  over the past six months.
Why?

We  shortened  the  fund's  average  maturity  because  of  prevailing  economic
conditions.  The U.S.  economy has experienced  strong  employment  growth,  but
inflation  has  remained  low.  These  conditions   rarely  co-exist  for  long;
eventually,  something  has to give. We expected to see wage  pressures  lead to
rising inflation,  which in turn would likely lead to a short-term interest rate
increase by the Federal Reserve.

Despite these expectations, we planned to extend the fund's maturity in December
by taking  advantage  of the usual  year-end  rise in the  yields of  short-term
municipal  securities (a result of selling by  corporations  that wish to "dress
up" their balance sheets with Treasury  securities at year-end).  However,  this
seasonal  effect was less  dramatic  than in past  years.  So,  rather  than buy
securities with  unattractive  yields, we allowed the fund's average maturity to
shorten further. By the end of the six-month period, the fund's average maturity
of 23 days was nearly three weeks  shorter  than that of the average  California
tax-exempt money market fund.

Has the supply of California municipal money market securities had any effect on
your management of the fund?

Yes,  and that's  another  reason why the fund's  maturity has been shorter than
normal.  We typically  invest a majority of the fund's  assets in  variable-rate
demand  notes  (VRDNs)  that reset  their rates on a daily or weekly  basis.  We
balance these  short-term  investments with  longer-term  municipal  securities,
which generally have maturities of 8-13 months.

However, a shortage of one-year California  municipal securities has made yields
in this maturity sector unattractive  compared to Treasurys and other short-term
tax-exempt  securities.  As  a  result,  we've  been  concentrating  the  fund's
investments in VRDNs, which now make up nearly 85% of the fund's portfolio. This
situation has contributed to the fund's shorter average maturity.

[pie charts - data described below]

PORTFOLIO  COMPOSITION  BY SECURITY TYPE (as of 2/28/97) 
VRDNs 83% 
Bonds less than 1 Year 9% 
Municipal Notes 5% 
Commerical Paper 3%

PORTFOLIO  COMPOSITION  BY SECURITY TYPE (as of 8/31/96) 
VRDNs 76% 
Put Bonds 13%
Municipal Notes 7% 
Bonds less than Year 3% 
Commercial Paper 1%


Semiannual Report                         California Municipal Money Market   15


                       CALIFORNIA MUNICIPAL MONEY MARKET

The fund  typically  invests a majority  of its  assets in AMT  paper.  Did this
change over the past six months?

The fund is  holding  more  AMT  paper  than  usual--about  70% of fund  assets,
compared to around 60% normally.  This is a direct result of the fund's  shorter
average  maturity,  since  the  majority  of AMT  paper is issued in the form of
weekly VRDNs.

Looking ahead, what are your plans for the fund over the next six months?

We will likely  extend the fund's  average  maturity  at some  point,  but we're
willing to wait until  one-year  municipal  yields become more  attractive.  The
Federal  Reserve  has given us  another  reason  to  wait--in  March,  it made a
pre-emptive strike against inflation by raising short-term  interest rates. Many
Fed watchers suspect this may be the first in a series of rate hikes.

But our decision to extend the fund's  maturity  will be based  primarily on the
relative values between VRDNs and longer-term municipal money market securities.
To make this  determination,  we project  VRDN  rates  over the coming  year and
compare our results to current rates on one-year municipal  securities.  We then
invest in whichever offers the higher yield.  Lately, VRDNs have been the better
buy, but we expect seasonal  supply factors to favor one-year  securities in the
coming months.

Can you describe some of these seasonal factors?

The next seasonal  opportunity for us to extend the fund's maturity is in April,
when many tax-exempt money market funds sell securities to meet cash outflows as
investors pay their tax bills.  But the best  opportunity will occur in June and
July, when many California municipalities issue a substantial amount of one-year
notes. We'll definitely look to extend the fund's average maturity at that time;
how far we extend will depend on economic  conditions.  If economic growth slows
down, we may extend the fund's  maturity out to 60 days or more, but we would be
less enthusiastic if the economy continued to strengthen.

How does credit research affect your management of the fund?

When it comes to security selection,  our municipal credit research team plays a
vital role. The team has set stringent guidelines and is proactive about keeping
the management team apprised of changing  credit  conditions.  Our  relationship
represents a good balance between yield and credit  quality--the fund management
team seeks out the most attractive  yields within the rigorous credit  standards
established by our credit research group.

[pie charts - data described below]

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 2/28/97)
SP1+ 67%
SP1 33%

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 8/31/96)
SP1+ 81%
SP1 19%


16   California Municipal Money Market              American Century Investments


                            SCHEDULE OF INVESTMENTS
                       CALIFORNIA MUNICIPAL MONEY MARKET

FEBRUARY 28, 1997 (UNAUDITED)

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

MUNICIPAL SECURITIES
$ 2,000,000   Agoura Hills Multifamily Housing
              Rev., (Oakridge Apartments
              Project), VRDN, 3.45%, 3-5-97
              (LOC: Continental Casualty Co.)                    $2,000,000
  2,000,000   Alameda County Industrial
              Development Auth. Rev., Series
              1994 A, (Scientific Technology
              Project), VRDN, 3.35%, 3-5-97
              (LOC: Banque National de Paris)                     2,000,000
  2,000,000   Anaheim Electrical Rev., 4.25%,
              10-1-97 (AMBAC)                                     2,004,523
  2,100,000   Auburn Industrial Development
              Auth. Rev., (Coherent Income
              Project), VRDN, 3.40%, 3-5-97
              (LOC: Bank of Tokyo-Mitsubishi)                     2,100,000
  2,815,000   Azusa Multifamily Housing Rev.,
              (Pacific Glen Apartments Project), 
              VRDN, 3.50%, 3-6-97 (LOC:
              Continental Casualty Co.)                           2,815,000
  4,600,000   Big Bear Lake Industrial Rev.,
              Series 1993 A, (Southwest Gas
              Project), VRDN, 3.25%, 3-5-97
          (   LOC: Union Bank of Switzerland)                     4,600,000
  1,175,000   California Counties Industrial
              Development Auth. Rev., (S&P
              Investments Project), VRDN,
              3.30%, 3-5-97 (LOC: California
              State Teachers Retirement
              System)                                             1,175,000
  3,515,000   California Housing Financing
              Agency Rev., VRDN, 3.45%,
              3-6-97 (MBIA) (SBBPA: Credit
              Suisse)                                             3,515,000
  4,100,000   California Housing Financing
              Agency Mortgage Rev., Series
              1996 J, Mandatory Put, 4.00%,
              7-24-97                                             4,101,535
  2,500,000   California Pollution Control
              Financing Auth. Rev., Commercial
              Paper, 3.45%, 5-1-97 (LOC:
              Morgan (J.P.) & Co. Inc.)                           2,500,000
  7,300,000   California Pollution Control
              Financing Auth. Rev., Series
              1990 B, (Colmac Energy
              Project), VRDN, 3.25%, 3-5-97
              (LOC: Swiss Bank, NY)                               7,300,000

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

$13,000,000   California Pollution Control
              Financing Auth. Rev., Series
              1996 A, (Pacific Gas and
              Electric), VRDN, 3.30%, 3-5-97
              (LOC: Swiss Bank, NY)                             $13,000,000
 12,000,000   California Pollution Control
              Financing Auth. Rev., Series
              1996 B, (Pacific Gas and
              Electric), VRDN, 3.25%, 3-5-97
              (LOC: Rabobank Nederland, NY)                      12,000,000
  1,300,000   California Pollution Control
              Financing Auth. Rev., Series
              1996 F, (Pacific Gas and
              Electric), VRDN, 3.35%, 3-3-97
              (LOC: Banque National de Paris)                     1,300,000
  2,700,000   California Pollution Control
              Financing Auth. Rev., Series
              1990 A, (Sanger Project), VRDN,
              3.25%, 3-5-97 (LOC: Credit
              Suisse)                                             2,700,000
  2,000,000   California Pollution Control
              Financing Auth. Rev., Series
              1986 C, (Southern California
              Edison), VRDN, 3.45%, 3-3-97                        2,000,000
  1,200,000   California Pollution Control
              Financing Auth. Rev., Series
              1994 B, (Taormina Industries),
              VRDN, 3.50%, 3-5-97 (LOC:
              Sanwa Bank, Ltd.)                                   1,200,000
  2,500,000   California Pollution Control
              Financing Auth. Rev., Series
              1996 A, (Taormina Industries),
              VRDN, 3.50%, 3-5-97 (LOC:
              Sanwa Bank, Ltd.)                                   2,500,000
  2,300,000   California Public Capital
              Improvements Project, Series
              1988 C, Quarterly Put Bond,
              3.65%, 3-15-97 (LOC: National
              Westminster Bank PLC)                               2,300,000
  2,000,000   California School Cash Reserve
              Program Auth. Rev., Series 1996
              A, 4.75%, 7-2-97 (MBIA)                             2,005,840
  7,000,000   California State Rev. Anticipation
              Notes, Series 1996, 4.50%,
              6-30-97                                             7,011,440

See Notes to Financial Statements


Semiannual Report                         California Municipal Money Market   17

                            SCHEDULE OF INVESTMENTS
                       CALIFORNIA MUNICIPAL MONEY MARKET

FEBRUARY 28, 1997 (UNAUDITED)

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

$ 4,800,000   California State Rev. Anticipation
              Notes, Series 1996 C-2, VRDN,
              3.25%, 3-5-97 (SBBPA: Bank
              of America, Bank of Nova
              Scotia-NY, Commerzbank
              Aktiengesel-NY, National
              Westminster Bank PLC)                              $4,800,000
  2,000,000   California Statewide Community
              Development Auth. Rev., (Howard
              S. Leight & Assoc.), VRDN,
              3.40%, 3-5-97 (LOC: Sanwa
              Bank Ltd.)                                          2,000,000
  1,500,000   California Statewide Communities
              Development Auth. Rev., Series
              1996 G, (Lansmont Property),
              VRDN, 3.40%, 3-5-97 (LOC:
              Wells Fargo & Co.)                                  1,500,000
  3,700,000   California Statewide Communities
              Development Auth. Rev.,
              (Levecke Project), VRDN,
              3.40%, 3-5-97 (LOC: Bank of
              Tokyo-Mitsubishi)                                   3,700,000
  1,035,000   California Statewide Communities
              Development Auth. Rev., Series
              1989, (Sunclipse Inc.), VRDN,
              3.30%, 3-5-97 (LOC: California
              State Teachers Retirement
              System)                                             1,035,000
  2,000,000   California Statewide Communities
              Development Auth. Rev., Series
              1995 D, (Whispering Winds
              Apartments), VRDN, 3.45%,
              3-5-97 (LOC: Continental
              Casualty Co.)                                       2,000,000
  3,800,000   Chula Vista Industrial Development
              Rev., (San Diego Gas and
              Electric), VRDN, 3.60%, 3-3-97                      3,800,000
  3,755,000   Contra Costa County Certificates of
              Participation, (Concord
              Healthcare Center), VRDN,
              3.35%, 3-5-97 (LOC: Boatman's
              First National Bank)                                3,755,000
  4,000,000   Contra Costa County Multifamily
              Housing Rev., Series 1994 A,
              (Del Norte Apartments), VRDN,
              3.40%, 3-4-97 (LOC: Sumitomo
              Bank)                                               4,000,000

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

$ 2,000,000   Fowler Industrial Development Auth.
              Rev., (Bee Sweet Citrus Inc.),
              VRDN, 3.40%, 3-6-97 (LOC:
              Bank of America)                                   $2,000,000
  1,000,000   Glenn Industrial Development Auth.
              Rev., (Land O'Lakes Income Project), 
              3.70%, 3-7-97 (LOC:Sanwa Bank Ltd.)                 1,000,000
    800,000   Irvine Ranch Water District, Series
              1985, VRDN, 3.35%, 3-3-97
              (LOC: Landbank
              Hessen-Thuringen Girozentrale)                        800,000
  1,000,000   Irvine Ranch Water District, Series
              1993, VRDN, 3.35%, 3-3-97
              (LOC: Bank of America)                              1,000,000
  4,000,000   Kern County Certificates of
              Participation, Series 1996 A,
              VRDN, 3.40%, 3-6-97 (LOC:
              Anchor National Life Insurance
              Company)                                            4,000,000
  2,500,000   Lassen Municipal Utility District
              Rev., VRDN, 3.40%, 3-6-97
              (FSA) (SBBPA: Credit Local
              De France)                                          2,500,000
  1,000,000   Livermore Multifamily Rev., Series
              1989 A, (Portola Meadows
              Apartments), VRDN, 3.30%,
              3-6-97 (LOC: Bank of America)                       1,000,000
  2,000,000   Long Beach Harbor Commercial
              Paper, 3.50%, 5-1-97 (Line of
              Credit: Industrial Bank of Japan,
              Ltd., Canadian Imperial Bank of
              Commerce, National Westminster
              Bank PLC, California State
              Teachers Retirement System,
              Banque National De Paris)                           2,000,000
    500,000   Long Beach Harbor Rev., Series
              1989 A, 6.80%, 5-15-97                                502,843
  2,900,000   Los Angeles County Industrial Development 
              Auth., (Tulip Corporation, Project 1989 A), 
              VRDN, 3.40%, 3-5-97 (LOC:
              La Salle National Bank)                             2,900,000
  1,250,000   Los Angeles County Public Works
              Financing Auth. Lease Rev.,
              Series 1996 A, 4.50%, 9-1-97
              (MBIA)                                              1,253,978

See Notes to Financial Statements


18   California Municipal Money Market              American Century Investments


                            SCHEDULE OF INVESTMENTS
                       CALIFORNIA MUNICIPAL MONEY MARKET

FEBRUARY 28, 1997 (UNAUDITED)

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

$ 1,570,000   Los Angeles County Public Works
              Financing Auth. Lease Rev.,
              Series 1996, 4.50%, 9-1-97
              (MBIA)                                             $1,574,690
  2,500,000   Los Angeles County Tax and Rev.
              Anticipation Notes, 4.50%,
              6-30-97 (LOC: Bank of America,
              Credit Suisse-NY, Morgan
              Guaranty Trust Co.-New York,
              Union Bank of Switzerland,
              Wesdeutsche Landesbank
              Girozentrale)                                       2,505,186
  3,000,000   Los Angeles Multifamily Housing
              Rev., Series 1991 D, (Lucas
              Studios Project), VRDN, 3.30%,
              3-6-97 (LOC: Bank of America)                       3,000,000
  4,950,000   Los Angeles Multifamily Housing
              Rev., Series 1994, (Oakwood
              Apartments), VRDN, 3.40%,
              3-4-97 (LOC: Sumitomo Bank,
              Ltd.)                                               4,950,000
  3,900,000   Los Angeles Multifamily Housing
              Rev., Series 1989 C, (Vermont
              Knoll Apartments), VRDN,
              3.65%, 3-5-97 (LOC: Wells
              Fargo & Co.)                                        3,900,000
  4,500,000   Los Angeles Wastewater System
              Commercial Paper, 3.45%,
              5-9-97 (LOC: Union Bank of
              Switzerland)                                        4,500,000
  2,000,000   Modesto Multifamily Housing Rev.,
              (Live Oak Apartments), VRDN,
              3.40%, 3-6-97 (FNMA)                                2,000,000
  5,500,000   Oceanside Multifamily Housing
              Rev., (Lakeridge Apartments
              Project), VRDN, 3.50%, 3-5-97
              (LOC: Continental Casualty)                         5,500,000
  2,400,000   Ontario Industrial Development
              Auth. Rev., Series 1988,
              (Winsford Partners), VRDN,
              3.40%, 3-5-97 (LOC: Bank
              of America)                                         2,400,000
  2,660,000   Pleasant Hill Redevelopment
              Agency, Series 1996 A, VRDN,
              3.40%, 3-6-97 (LOC:
              Commerzbank Aktiengesel-
              New York)                                           2,660,000

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

$   500,000   Rancho Mirage Redevelopment
              Agency Certificates of
              Participation, VRDN, 3.30%,
              3-6-97 (LOC: Bank of America)                  $      500,000
  1,500,000   Riverside County Industrial Auth.
              Rev., Series 1987, (Rocklin
              Corp.), VRDN, 3.40%, 3-5-97
              (LOC: Royal Bank of Canada)                         1,500,000
  1,015,000   Riverside County Multifamily
              Housing Rev., Series 1986 A,
              (Tyler Village Project), VRDN,
              3.35%, 3-5-97 (LOC: Chase
              Manhatten Bank)                                     1,015,000
  9,500,000   Sacramento County Housing Auth.
              Rev., Issue 1992 A, (Shadowood
              Apartments Projects), VRDN,
              3.40%, 3-5-97 (LOC: GE
              Capital Corp.)                                      9,500,000
    900,000   San Diego Industrial Development
              Rev., Series 1987 A, (Kaiser
              Aerospace and Electricity, VRDN,
              3.45%, 3-6-97 (LOC: ABN
              Amro Bank)                                            900,000
  1,300,000   San Joaquin County Industrial
              Development Auth. Rev.,
              (Modtech Inc.), VRDN, 3.30%,
              3-5-97 (LOC: Bank of
              Tokyo-Mitsubishi)                                   1,300,000
  3,500,000   San Jose Multifamily Housing Rev.,
              Series 1996 A, (Siena at
              Renaissance), VRDN, 3.30%,
              3-5-97 (LOC: Bank One)                              3,500,000
  3,850,000   Santa Ana Multifamily Housing
              Auth. Rev., VRDN, 3.30%,
              3-6-97 (LOC: Bank of America)                       3,850,000
  2,000,000   Santa Paula Public Financing Auth.
              Rev., VRDN, 3.50%, 3-5-97
              (LOC: Bank of Tokyo-Mitsubishi)                     2,000,000
    700,000   South San Francisco Multifamily
              Housing Rev.,  Series 1987 A, 
              (Magnolia Plaza  Apartments),  
              VRDN, 3.30%, 3-5-97 (LOC:
              Wells Fargo & Co.)                                    700,000
  4,200,000   Vallejo Industrial Development
              Auth. Rev., Series 1993 A,
              (Meyer Cookware Industries
              Project), VRDN, 3.50%, 3-5-97
              (LOC: Bank of Tokyo-Mitsubishi)                     4,200,000
                                                                  ---------
TOTAL INVESTMENT SECURITIES--100.0%                            $187,630,035
                                                                ===========

See Notes to Financial Statements


Semiannual Report                         California Municipal Money Market   19


                            SCHEDULE OF INVESTMENTS
                       CALIFORNIA MUNICIPAL MONEY MARKET

FEBRUARY 28, 1997 (UNAUDITED)

Notes to Schedule of Investments 
AMBAC = AMBAC Indemnity Corp.
FNMA = Federal National Mortgage Association
FSA = Financial Security Association
LOC = Letter of Credit
MBIA = Municipal Bond Insurance Association
SBBPA = Standby Bond Purchase Agreement
VRDN = Variable Rate Demand Note.  Interest  reset date is indicated and used in
calculating the weighted  average  portfolio  maturity.  Rate shown is effective
February 28, 1997.

See Notes to Financial Statements

20   California Municipal Money Market              American Century Investments

<TABLE>
<CAPTION>
                         CALIFORNIA HIGH-YIELD MUNICIPAL

                                                        30-DAY            30-DAY TAX-EQUIVALENT YIELDS
                                                           SEC       34.70%       37.42%       41.95%        45.22%
                                                         YIELD  Tax Bracket  Tax Bracket  Tax Bracket   Tax Bracket
                                                         -----  -----------  -----------  -----------   -----------

CURRENT YIELD (as of February 28, 1997)
<S>                                                      <C>          <C>          <C>          <C>           <C>  
California High-Yield Municipal                          5.36%        8.21%        8.57%        9.23%         9.78%

Yields are defined in the Glossary on page 53.
</TABLE>

<TABLE>
                                                                           AVERAGE ANNUAL RETURNS
                                                      6 MONTHS       1 YEAR      3 YEARS      5 YEARS      10 YEARS
TOTAL RETURNS (as of February 28, 1997)
<S>                                                      <C>          <C>          <C>          <C>           <C>  
California High-Yield Municipal ......................   5.04%        6.97%        6.32%        7.93%         6.36%
Lehman Long-Term Municipal Bond Index ................   5.99%        6.18%        6.46%        8.33%         8.34%
Average California Municipal Debt Fund(1) ............   4.76%        4.81%        5.10%        6.94%         6.67%
Fund's Ranking Among California
Municipal Debt Funds(1) ..............................    --    2 out of 98  4 out of 68  3 out of 50  21 out of 30

(1)According to Lipper Analytical Services.
</TABLE>

See pages 52-53 for more information  about returns,  the comparative  index and
Lipper fund rankings.

[line graph - data below]

GROWTH OF $10,000 OVER TEN YEARS

$10,000 investment made 2/28/87

                    Lehman Long-Term Municipal Index     High-Yield Municipal
2/28/87                         $10,000                        $10,000
3/31/87                          $9,853                        $10,030
4/30/87                          $9,300                         $8,809
5/31/87                          $9,197                         $8,624
6/30/87                          $8,904                         $8,858
7/31/87                          $8,987                         $8,913
8/31/87                          $9,027                         $8,930
9/30/87                          $8,658                         $8,465
10/31/87                         $8,658                         $8,285
11/30/87                         $8,934                         $8,529
12/31/87                         $9,051                         $8,692
1/31/88                          $9,412                         $9,000
2/29/88                          $9,523                         $9,111
3/31/88                          $9,386                         $9,011
4/30/88                          $9,461                         $9,075
5/31/88                          $9,470                         $9,114
6/30/88                          $9,655                         $9,225
7/31/88                          $9,720                         $9,293
8/31/88                          $9,758                         $9,392
9/30/88                          $9,979                         $9,541
10/31/88                        $10,206                         $9,682
11/30/88                        $10,097                         $9,677
12/31/88                        $10,272                         $9,774
1/31/89                         $10,514                         $9,932
2/28/89                         $10,367                         $9,954
3/31/89                         $10,375                         $9,950
4/30/89                         $10,680                        $10,079
5/31/89                         $10,927                        $10,277
6/30/89                         $11,093                        $10,388
7/31/89                         $11,240                        $10,501
8/31/89                         $11,069                        $10,412
9/30/89                         $11,035                        $10,425
10/31/89                        $11,181                        $10,506
11/30/89                        $11,419                        $10,680
12/31/89                        $11,503                        $10,718
1/31/90                         $11,387                        $10,680
2/28/90                         $11,515                        $10,827
3/31/90                         $11,527                        $10,831
4/30/90                         $11,386                        $10,695
5/31/90                         $11,708                        $10,999
6/30/90                         $11,823                        $11,111
7/31/90                         $12,032                        $11,318
8/31/90                         $11,745                        $11,012
9/30/90                         $11,727                        $10,969
10/31/90                        $11,975                        $11,076
11/30/90                        $12,279                        $11,270
12/31/90                        $12,333                        $11,324
1/31/91                         $12,498                        $11,509
2/28/91                         $12,586                        $11,555
3/31/91                         $12,616                        $11,587
4/30/91                         $12,812                        $11,780
5/31/91                         $12,962                        $11,914
6/30/91                         $12,938                        $11,907
7/31/91                         $13,138                        $12,074
8/31/91                         $13,327                        $12,196
9/30/91                         $13,520                        $12,362
10/31/91                        $13,661                        $12,461
11/30/91                        $13,678                        $12,457
12/31/91                        $14,004                        $12,560
1/31/92                         $13,996                        $12,547
2/29/92                         $14,018                        $12,653
3/31/92                         $14,053                        $12,739
4/30/92                         $14,187                        $12,835
5/31/92                         $14,394                        $12,987
6/30/92                         $14,673                        $13,189
7/31/92                         $15,211                        $13,593
8/31/92                         $15,007                        $13,429
9/30/92                         $15,073                        $13,512
10/31/92                        $14,822                        $13,242
11/30/92                        $15,239                        $13,566
12/31/92                        $15,437                        $13,712
1/31/93                         $15,582                        $13,810
2/28/93                         $16,307                        $14,267
3/31/93                         $16,110                        $14,180
4/30/93                         $16,331                        $14,376
5/31/93                         $16,466                        $14,519
6/30/93                         $16,775                        $14,781
7/30/93                         $16,792                        $14,791
8/31/93                         $17,222                        $15,122
9/30/93                         $17,446                        $15,320
10/31/93                        $17,479                        $15,407
11/30/93                        $17,268                        $15,281
12/31/93                        $17,713                        $15,519
1/31/94                         $17,922                        $15,724
2/28/94                         $17,329                        $15,421
3/31/94                         $16,294                        $14,815
4/29/94                         $16,420                        $14,759
5/31/94                         $16,612                        $14,955
6/30/94                         $16,413                        $14,930
7/29/94                         $16,834                        $15,236
8/31/94                         $16,870                        $15,254
9/30/94                         $16,478                        $15,077
10/31/94                        $15,972                        $14,852
11/30/94                        $15,551                        $14,472
12/30/94                        $16,103                        $14,687
1/31/95                         $16,811                        $15,099
2/28/95                         $17,496                        $15,467
3/31/95                         $17,706                        $15,742
4/28/95                         $17,697                        $15,748
5/31/95                         $18,451                        $16,221
6/30/95                         $18,111                        $16,056
7/31/95                         $18,203                        $16,122
8/31/95                         $18,460                        $16,335
9/30/95                         $18,604                        $16,450
10/31/95                        $19,054                        $16,702
11/30/95                        $19,546                        $17,074
12/31/95                        $19,851                        $17,374
1/31/96                         $19,936                        $17,392
2/29/96                         $19,693                        $17,325
3/31/96                         $19,333                        $17,111
4/30/96                         $19,255                        $17,071
5/31/96                         $19,265                        $17,159
6/30/96                         $19,562                        $17,425
7/31/96                         $19,755                        $17,594
8/31/96                         $19,730                        $17,641
9/30/96                         $20,168                        $17,938
10/31/96                        $20,414                        $18,105
11/30/96                        $20,853                        $18,499
12/31/96                        $20,727                        $18,397
1/31/97                         $20,686                        $18,353
2/28/97                         $22,288                        $18,536

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

PORTFOLIO AT A GLANCE
                                 2/28/97          8/31/96
Number of Securities               98               90
Weighted Average Maturity      21.5 years       20.7 years
Average Duration                7.6 years        7.5 years
Expense Ratio                    0.50%*            0.51%

* Annualized.


Semiannual Report                           California High-Yield Municipal   21


                        CALIFORNIA HIGH-YIELD MUNICIPAL

Management Q & A

An interview with Steven Permut,  a senior  portfolio  manager on the California
Tax-Free and Municipal funds management team.

How did the fund perform?

The fund performed  well. For the six-month  period ended February 28, 1997, the
fund's total  return of 5.04% was  significantly  higher than the 4.76%  average
return of the 100 "California Municipal Debt Funds" tracked by Lipper Analytical
Services. From a one-year perspective, the fund's performance was even stronger;
its 6.97% average  annual  return ranked it #2 among its Lipper peers.  (See the
Total  Returns   table  on  the  previous   page  for  other  fund   performance
comparisons.)

How did the fund's yield stack up against the competition?

The fund continued to provide  shareholders with a high level of current income.
As of February 28, the fund's 30-day SEC yield was 5.36%,  compared to the 4.52%
average yield of its peers.+


+ Although the fund's yield may be significantly higher than the yields of other
fixed-income funds that purchase higher-rated  securities,  this higher yield is
generally  based upon the greater  credit risk of the  securities  in the fund's
portfolio.

[bar graph - data below]

CALIFORNIA HIGH-YIELD MUNICIPAL FISCAL YEAR-BY-YEAR RETURNS (Periods ended
August 31)

                 High-Yield Municipal         Lehman Long-Term Municipal Index
1987*                   -10.19%                            -0.28%
1988                     5.17                               8.10
1989                     10.88                              13.44
1990                     5.77                               6.11
1991                     10.75                              13.47
1992                     10.11                              12.60
1993                     12.61                              14.76
1994                     0.87                               -2.05
1995                     7.09                               9.43
1996                     8.02                               6.88

This chart  illustrates  the  historical  year-by-year  volatility of the fund's
returns  since its inception  and compares  them with the index's  returns.  The
fund's total returns include operating  expenses,  while the index's do not. See
page 52 for a  definition  of the  index.  

*    Return from the fund's 12/30/86 inception date to 8/31/87.


22   California High-Yield Municipal                American Century Investments


                        CALIFORNIA HIGH-YIELD MUNICIPAL

What's behind the fund's continued strong performance?

In general,  California  high-yield  municipal  securities  performed  very well
during the period as credit quality spreads--the  differences between the yields
of  high-rated  securities  and those of  lower-rated  securities--continued  to
narrow.  This compression of credit quality spreads in the California  municipal
market is a direct  result of the state's  improving  economic  outlook and real
estate  market.   In  addition,   municipal  bond  insurers  have  insured  more
lower-quality  California  issues,  adding strength to the narrowing  trend. The
fund, which holds a relatively high position in lower-rated securities,  greatly
benefited from this trend. A number of issues held by the fund were  prerefunded
and experienced  credit  improvement  during the six-month period,  boosting the
fund's returns.

Have all lower-rated California municipal bonds been good buys?

No. That's where our professional management team adds value. We have to be very
selective when looking at BBB and unrated issues. We recently increased the size
of our  municipal  credit  research  team and now have five  analysts  carefully
evaluating  all  securities  considered  for  purchase  by  the  fund.  Using  a
disciplined  bottom-up,  value-oriented  approach,  the  credit  team  looks for
securities  that may be  undervalued  by virtue of their credit rating or market
valuation.  The credit research team's work has been a vital factor in improving
the fund's returns while minimizing its credit risk.

How was the fund positioned during the period?

We lengthened  the fund's  duration in the third and fourth  quarters of 1996 as
bonds  rallied,  but  shortened  it up when the bond market began to sell off in
December  and  January.   As  of  February  28,  the  fund's  duration  was  7.6
years--nearly  the  same  as it was at the end of  August.  Pulling  the  fund's
duration  back brought the fund to a roughly  neutral  position  relative to its
peers and reduced the fund's vulnerability to interest rate fluctuations.

What is your outlook for the municipal market going forward?

In general, we expect to see slightly higher interest rates in the coming months
as the Federal  Reserve moves to keep a lid on  inflation.  But in the municipal
market, we expect  continuing  strong growth in California's  economy to further
boost the  performance  of high-yield  municipal  securities,  which should keep
credit quality

[pie charts - data below]

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 2/28/97) 
Revenue 37% 
Land-Secured 35% 
COPs/Leases 19% 
Prerefunded/ETM 5% 
GO 2% 
Other 2%

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 8/31/96) 
Revenue 42% 
Land-Secured 37% 
COPs/Leases 13% 
Prerefunded/ETM 3% 
GO 3% 
Other 2%


Semiannual Report                           California High-Yield Municipal   23


                        CALIFORNIA HIGH-YIELD MUNICIPAL

spreads for California issues very narrow.  We also anticipate  limited issuance
of  lower-quality  securities.   This  situation  will  likely  result  in  more
competition and higher prices for high-yield securities.

What are your plans for the fund over the next six months?

Given the  likelihood  of higher  rates,  we will  probably  maintain the fund's
neutral  duration.  In addition,  we will  continue to utilize our strong credit
research  team to search for  securities  with  undervalued  credit  ratings and
market  valuations  that we believe have the potential to appreciate in the near
term. We will look to increase the fund's holdings in unrated bonds to about 35%
of the portfolio,  but this plan is dependent on whether we can find issues that
meet our credit criteria and represent good value.

[pie charts - data below]

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 2/28/97)

AAA 26%
AA 4%
A 23%
BBB 15%
Unrated 32%

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 8/31/96)

AAA 23%
AA 2%
A 27%
BBB 16%
Unrated 32%


24   California High-Yield Municipal                American Century Investments


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA HIGH-YIELD MUNICIPAL

FEBRUARY 28, 1997 (UNAUDITED)

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

MUNICIPAL SECURITIES
$ 2,000,000   Alameda Public Financing Auth.
              Local Agency Rev., Series 1996
              A, (Community Facility District
              Number 1), 7.00%, 8-1-19                           $2,081,760
  1,000,000   Albany Unified School District GO,
              Series 1995 C, 5.00%, 8-1-19
              (FSA)                                                 905,520
    700,000   Bishop, Escalon & Lemoore Cities
              Certificates of Participation,
              Series 1991 A, 7.70%, 5-1-11                          747,236
  3,000,000   Brawley Certificates of Participation,
              (Water System Improvement
              Project), 6.40%, 12-1-26                            2,912,370
  1,540,000   Brisbane Certificates of
              Participation, (Capital
              Improvement Refinancing
              Project), 6.00%, 4-1-18                             1,537,151
    500,000   California Educational Facilities
              Auth. Rev., (California Lutheran
              University), 7.375%, 12-1-16                          537,680
  1,000,000   California Educational Facilities
              Auth. Rev., (Mills College),
              6.875%, 9-1-22                                      1,078,170
  1,000,000   California Educational Facilities
              Auth. Rev., Series 1993 B,
              (Pooled College and University
              Financing), 6.125%, 6-1-09                          1,020,650
  5,350,000   California Educational Facilities
              Auth. Rev., (St. Mary's College),
              4.75%, 10-1-20 (MBIA)                               4,635,668
  4,000,000   California Health Facilities
              Financing Auth. Rev., Series
              1989 A, (Kaiser Permanente),
              5.59%, 10-1-12 (AMBAC)(1)                           1,693,280
  2,015,000   California Health Facilities
              Financing Auth. Rev., Series
              1986 A, (Pomona Valley
              Community Hospital), 7.00%,
              1-1-17                                              2,038,515
    170,000   California Housing Finance Agency
              Home Mortgage Rev. Bonds,
              Series 1988 B, 8.60%, 8-1-19                          177,495

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

$   610,000   California Housing Finance Agency
              Home Mortgage Rev. Bonds,
              Series 1989, 8.00%, 8-1-29                        $   637,438
    480,000   California Housing Finance Agency
              Home Mortgage Rev. Bonds,
              Series 1990 C, 7.60%, 8-1-30                          506,380
  1,955,000   California Housing Finance Agency
              Home Mortgage Rev. Bonds,
              Series 1997 B, 6.10%, 2-1-28
              (MBIA)                                              1,983,015
  3,455,000   California Housing Finance Agency
              Multifamily Mortgage Rev. Bonds,
              Series 1997 A, 5.95%, 8-1-28
              (MBIA)                                              3,463,603
  3,500,000   California Housing Finance Agency
              Multi-Unit Mortgage Rev. Bonds,
              Series 1992 C, 6.875%, 8-1-24                       3,636,570
  1,500,000   California Maritime Infrastructure
              Auth. Airport Rev., (San Diego
              Unified Port District Airport),
              5.00%, 11-1-20 (AMBAC)                              1,356,240
    400,000   California Public Capital
              Improvements Financing Auth.
              Rev., Series 1988 A, (Pooled
              Project), 8.50%, 3-1-18                               420,824
    500,000   California State Department of
              Veterans Affairs Home Purchase
              Rev., Series 1988 A, 8.30%,
              8-1-19                                                520,180
  4,000,000   California State Department of
              Water Resources Rev., Series
              1993 M, 5.00%, 12-1-19                              3,633,280
  3,665,000   California State GO, 5.35%,
              9-1-09(1)                                           1,893,486
  2,000,000   California State Public Works
              Board Lease Rev., Series 1993
              D, (Department of Corrections),
              5.25%, 6-1-15 (FSA)                                 1,961,860
  1,000,000   California State Public Works
              Board Lease Rev., Series 1993
              A, (Various State University
              Projects), 5.50%, 12-1-18                             953,000
  5,000,000   California State Public Works
              Board Lease Rev., Series 1993
              B, (Various State University
              Projects), 5.50%, 6-1-19                            4,762,350

See Notes to Financial Statements


Semiannual Report                           California High-Yield Municipal   25


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA HIGH-YIELD MUNICIPAL

FEBRUARY 28, 1997 (UNAUDITED)

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

$ 1,000,000   California Statewide Communities
              Development Auth. Rev.
              Certificates of Participation,
              Series 1996 A, (Insurance
              Health Facility, San Gabriel
              Valley), 5.50%, 9-1-14 (California
              Mortgage Insurance)                               $   980,730
    580,000   Clayton Improvement Bond Act
              1915 Special Assessment,
              (Oakhurst Assessment District),
              8.00%, 9-2-14                                         600,886
    130,000   Clayton Improvement Bond Act
              1915 Special Assessment,
              Series 1988 A, (Oakhurst
              Assessment District ), 8.40%,
              9-2-10                                                134,679
  4,500,000   Colton Public Financing Auth. Rev.,
              Series 1995, (Electric System),
              7.50%, 10-1-20                                      4,709,745
  3,185,000   Contra Costa County Certificates
              of Participation, (Merrithew
              Memorial Hospital Project),
              5.375%, 11-1-17 (MBIA)                              3,046,898
    750,000   Contra Costa County Public
              Financing Auth. Tax Allocation
              Rev., Series 1992 A, 7.10%,
              8-1-22                                                800,535
    695,000   Corcoran Certificates of
              Participation, 8.75%, 6-1-16(2)                       717,865
    500,000   Cucamonga School District
              Certificates of Participation,
              Series 1990, 7.60%, 12-1-99,
              Prerefunded at 102% of Par(3)                         556,755
  1,000,000   Davis Community Facility District
              Number 1991-2, Series 1992
              B, 7.80%, 9-1-22                                    1,080,230
  1,500,000   Del Mar Race Track Auth. Rev.,
              6.20%, 8-15-11                                      1,537,695
  1,000,000   El Dorado County Board Auth.
              Lease Rev., (Capital Facility
              Project), 7.40%, 11-1-09                            1,098,190
    350,000   Folsom Redevelopment Agency
              Tax Allocation Rev., Series 1987
              A, 8.60%, 2-1-13                                      364,018

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

$ 1,500,000   Folsom Special Tax, (Community
              Facility District Number 7),
              7.25%, 9-1-21                                      $1,527,270
  2,350,000   Fontana Community Facility District
              Number 2 Special Assessment,
              Series 1988 B, 8.50%, 9-1-17                        2,470,062
  2,000,000   Fontana Public Financing Auth. Tax
              Allocation Rev., Series 1993 A,
              5.00%, 9-1-20 (MBIA)                                1,823,520
  1,000,000   Fontana Redevelopment Agency
              Tax Allocation, (Jurupa Hills
              Project), 8.00%, 1-1-98                             1,016,720
  2,500,000   Fontana Redevelopment Agency
              Tax Allocation, Series 1994 B,
              (Jurupa Hills Project), 7.70%,
              1-1-19                                              2,660,125
  1,040,000   Foothill-De Anza Community
              College District Certificates of
              Participation, Series 1992,
              (Campus Center Project), 7.35%,
              3-1-07                                              1,151,758
  2,500,000   Foster City Redevelopment Agency
              Tax Allocation, (Metro Center),
              6.75%, 9-1-20                                       2,651,575
  1,185,000   Gateway Improvement Auth. Rev.,
              Series 1995 A, (Marin City
              Community Facility), 7.75%,
              9-1-25                                              1,274,539
  1,250,000   Hollister Redevelopment Agency
              Tax Allocation, Series 1989,
              (Hollister Community
              Development Project), 7.55%,
              10-1-13                                             1,326,350
  2,000,000   Industry Urban Redevelopment
              Agency Tax Allocation,
              (Project 3), 6.90%, 11-1-16                         2,139,700
    985,000   Irvine Improvement Bond 1915
              Special Assessment, Series
              1992 A, (District Number 89-9),
              7.40%, 9-2-17                                       1,012,777
  1,000,000   Lake Elsinore Unified School
              District Community Facilities
              District Special Tax, Series 1991,
              (Number 88-1), 8.25%, 9-1-16                        1,068,330

See Notes to Financial Statements


26   California High-Yield Municipal                American Century Investments


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA HIGH-YIELD MUNICIPAL

FEBRUARY 28, 1997 (UNAUDITED)

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

$   120,000   Los Angeles County Single Family
              Mortgage Rev., (GNMA
              Mortgage, Issue B), 9.00%,
              12-1-20, (GNMA Collateral)                        $   126,523
  1,000,000   Los Angeles County Transportation
              Commission Sales Tax Rev.,
              Series 1991 B, 6.50%, 7-1-13                        1,060,440
     30,000   Los Angeles Home Mortgage Rev.
              Bonds, 9.00%, 6-15-18                                  30,525
  1,750,000   Los Angeles State Building Auth.
              Lease Rev., Series 1993 A,
              5.625%, 5-1-11                                      1,790,250
  5,075,000   Los Angeles Wastewater System
              Rev., Series 1993 D, 5.20%,
              11-1-21 (FGIC)                                      4,699,552
  3,000,000   Milpitas Improvement Bond Act
              1915, Series 1996 A, (District
              Number 18), 6.75%, 9-2-16                           3,020,820
  4,925,000   Northern California Power Agency
              Rev., Series E, (Hydroelectric
              Project Number 1), 7.15%,
              7-1-24                                              5,169,625
  2,000,000   Norwalk Community Facilities
              Financing Auth. Tax Allocation,
              Series 1995 B, 7.40%, 9-15-25                       2,133,700
  2,000,000   Novato Community Facility District
              Number 1 Special Tax, (Vintage
              Oaks Project), 7.20%, 8-1-15                        2,083,780
  1,000,000   Orange County Community
              Facilities District Special Tax,
              Series 1993 A, (Number 87-5E),
              7.30%, 8-15-18                                      1,048,550
  1,500,000   Orange Cove Irrigation District
              Certificates of Participation,
              Series 1992, 7.00%, 2-1-15                          1,672,755
  1,000,000   Pioneer Union Elementary School
              District GO, Series 1990, 7.50%,
              8-1-14                                              1,070,270
  1,500,000   Pittsburg Assessment District 92-1
              Special Assessment, (Village at
              New York Landing), 8.00%,
              9-2-22                                              1,554,480
    880,000   Pittsburg Assessment District 90-1
              Special Assessment, (Oak Hills),
              7.75%, 9-2-20                                         913,220

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

$ 2,240,000   Pittsburg Redevelopment Agency
              Tax Allocation, Series 1993 A,
              (Los Medanos Project), 5.00%,
              8-1-17 (AMBAC)                                     $2,045,792
  3,500,000   Pittsburg Redevelopment Agency
              Tax Allocation, (Los Medanos
              Project), 6.25%, 8-1-26                             3,529,575
  1,500,000   Pomona Public Financing Auth.
              Rev., Series 1993 L, (Southwest
              Pomona Redevelopment), 5.70%,
              2-1-13                                              1,466,940
  5,000,000   Pomona Improvement Bond Act
              1915, (Rio Rancho Assessment
              District), 7.50%, 9-2-21                            5,175,600
  2,250,000   Rancho Mirage Joint Powers
              Financing Auth. Certificates of
              Participation, (Eisenhower
              Memorial Hospital), 7.00%,
              3-1-22                                              2,539,508
  2,000,000   Redding Joint Powers Financing
              Auth. Electric Systems Rev.,
              Series 1996 A, 5.25%,
              6-1-15 (MBIA)                                       1,943,800
  1,285,000   Redding Redevelopment Agency
              Tax Allocation, 5.00%, 9-1-23
              (FSA)                                               1,153,879
  1,815,000   Redondo Beach Public Financing
              Auth. Rev., (South Bay Center
              Redevelopment Project), 7.125%,
              7-1-26                                              1,911,522
  1,000,000   Richmond Joint Powers Financing
              Auth. Rev., Series 1995 A,
              5.25%, 5-15-13                                        947,640
  1,000,000   Rocklin Stanford Ranch Community
              Facilities District Special Tax,
              8.10%, 11-1-00, Prerefunded at
              102% of Par(3)                                      1,144,660
    500,000   Roseville Community Facilities
              District Number 2 Special Tax,
              8.25%, 9-1-21                                         535,450
  2,500,000   Sacramento County Certificates of
              Participation, 5.375%, 2-1-19
              (MBIA)                                              2,400,425
  2,490,000   Sacramento School Insurance Auth.
              Rev., Series 1993 C, (Workers
              Compensation Program), 5.75%,
              6-1-03(3)                                           2,650,680

See Notes to Financial Statements


Semiannual Report                           California High-Yield Municipal   27


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA HIGH-YIELD MUNICIPAL

FEBRUARY 28, 1997 (UNAUDITED)

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

$ 1,965,000   Salinas Assessment District 94-1,
              Harden Ranch), 6.875%, 9-2-11                      $2,036,349
  1,000,000   San Diego Community Facilities
              District Number 1 Special Tax,
              Series 1995 B, 7.10%, 9-1-20                        1,038,610
  1,780,000   San Jose Finance Auth. Rev.,
              Series 1993 C, (Convention
              Center), 6.30%, 9-1-09                              1,882,012
  3,250,000   Sierra Sands Unified School
              District Certificates of
              Participation, Series 1993,
              (Capital Improvement Refinancing
              Project), 5.75%, 2-1-23                             3,166,572
  3,000,000   South Orange County Public
              Financing Auth. Special Tax,
              Series 1994 B, (Jr. Lien), 7.25%,
              9-1-13                                              3,177,150
  1,615,000   South San Francisco
              Redevelopment Agency, 7.60%,
              9-1-18                                              1,718,473
    480,000   Southern California Housing
              Finance Auth. Single Family
              Mortgage Rev., Series A, (GNMA
              & FNMA Mortgage-Backed
              Securities), 7.35%, 9-1-24                            506,491
    500,000   Southern California Public Power
              Auth. Rev., (Pooled Project),
              6.75%, 7-1-10 (FSA)                                   578,835
  2,000,000   Southern California Public Power
              Auth. Rev., Series 1993 A,
              5.00%, 7-1-15 (AMBAC)                               1,872,080
  2,400,000   Southern California Public Power
              Auth. Rev., (Transmission Project),
              5.69%, 7-1-14 (MBIA)(1)                               907,104
  2,000,000   Southern California Public Power
              Auth. Rev., (Transmission Project),
              5.73%, 7-1-15 (MBIA)(1)                               709,600
    500,000   St. Helena Certificates of
              Participation, Series 1991 C,
              7.875%, 6-1-00, Prerefunded at
              102% of Par(3)                                        561,810
  1,000,000   Standard Elementary School
              District Certificates of
              Participation, Series 1991,
              7.375%, 6-1-11                                      1,069,620

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

$ 1,770,000   Tehama Community Certificates of
              Participation, (Social Services
              Building Project), 7.00%,
              10-1-20                                        $    1,944,416
  1,740,000   Torrance Hospital Rev., (Little
              County of Mary Hospital),
              6.875%, 7-1-15                                      1,859,869
  1,565,000   Twentynine Palms Water District
              Certificates of Participation,
              7.10%, 8-1-22                                       1,651,028
    950,000   Vista Joint Powers Financing Auth.
              Rev., Series 1990 A, 7.50%,
              1-1-16                                                998,146
  3,500,000   University of California Rev., Series
              1993 C, (Multiple Purpose
              Projects), 5.00%, 9-1-23
              (AMBAC)                                             3,142,860
  2,000,000   West Contra Costa Unified School
              District Certificates of
              Participation, 7.125%, 1-1-24                       2,127,280
  1,520,000   Windsor Redevelopment Agency
              Tax Allocation, 6.875%, 9-1-15                      1,613,601
  1,000,000   Yosemite Community College
              District Certificates of
              Participation, Series 1991,
              7.75%, 7-1-01, Prerefunded at
              102% of Par(3)                                      1,161,730
                                                                 ----------
TOTAL MUNICIPAL SECURITIES-99.4%                                168,388,270
   (Cost $161,268,197)                                          ===========

SHORT-TERM MUNICIPAL SECURITIES-0.6%
  1,000,000   California Pollution Control
              Financing Auth. Rev., (Pacific
              Gas & Electric), VRDN, 3.35%,
              3-3-97                                              1,000,000
   (Cost $1,000,000)                                             ----------

TOTAL INVESTMENT SECURITIES-100.0%                             $169,388,270
   (Cost $162,268,197)                                          ===========

See Notes to Financial Statements


28   California High-Yield Municipal                American Century Investments


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA HIGH-YIELD MUNICIPAL

FEBRUARY 28, 1997 (UNAUDITED)

Notes to Schedule of Investments 
AMBAC = AMBAC Indemnity Corp.
FGIC = Financial Guaranty Insurance Company 
FNMA = Federal National Mortgage Association  
FSA = Financial Security Association  
GNMA = Government National Mortgage Association  
GO = General Obligation  
MBIA = Municipal Bond Insurance Association
VRDN = Variable Rate Demand Note.  Interest  reset date is indicated and used in
calculating the weighted  average  portfolio  maturity.  Rate shown is effective
February 28, 1997.
(1) This  security is a  zero-coupon  municipal  bond.  The yield to maturity at
current  market  value is shown  instead of a stated  coupon  rate.  Zero-coupon
securities are purchased at a substantial discount from their value at maturity.
(2) Private  placement  security which cannot be offered for public sale without
first  being  registered  under  the  Securities  Act of 1933.  The value of the
security was $717,865, which represents 0.4% of the net assets of the Fund.
(3) Escrowed in U.S. Government Securities.

See Notes to Financial Statements


Semiannual Report                           California High-Yield Municipal   29

<TABLE>
<CAPTION>

                           CALIFORNIA INSURED TAX-FREE

                                                    30-DAY            30-DAY TAX-EQUIVALENT YIELDS
                                                       SEC       34.70%       37.42%       41.95%       45.22%
                                                     YIELD  Tax Bracket  Tax Bracket  Tax Bracket  Tax Bracket
                                                     -----  -----------  -----------  -----------  -----------

CURRENT YIELD (as of February 28, 1997)
<S>                                                  <C>          <C>          <C>          <C>          <C>  
California Insured Tax-Free                          4.75%        7.27%        7.59%        8.18%        8.67%

Yields are defined in the Glossary on page 53.
</TABLE>

<TABLE>
                                                          AVERAGE ANNUAL RETURNS
                                                  6 MONTHS       1 YEAR      3 YEARS      5 YEARS     10 YEARS
                                                  --------       ------      -------      -------     --------
TOTAL RETURNS (as of February 28, 1997)
<S>                                                  <C>          <C>          <C>          <C>          <C>  
California Insured Tax-Free ......................   4.89%        4.78%        5.71%        7.58%        6.48%
Lehman Long-Term Municipal Bond Index ............   5.99%        6.18%        6.46%        8.33%        8.34%
Average California Insured
Municipal Debt Fund(1) ...........................   4.77%        4.36%        4.97%        7.34%        6.80%
Fund's Ranking Among California
Insured Municipal Debt Funds(1) ..................    --  11 out of 28  4 out of 20   3 out of 8   8 out of 8

(1)  According to Lipper Analytical Services.
</TABLE>

See pages 52-53 for more information  about returns,  the comparative  index and
Lipper fund rankings.

[line graph - data below]

GROWTH OF $10,000 OVER TEN YEARS

$10,000 investment made 2/28/97

                   Insured Tax-Free  Lehman Long-Term Municipal Index
2/28/87                $10,000                   $10,000
3/31/87                 $9,913                    $9,853
4/30/87                 $8,884                    $9,300
5/31/87                 $8,768                    $9,197
6/30/87                 $9,011                    $8,904
7/31/87                 $9,055                    $8,987
8/31/87                 $9,121                    $9,027
9/30/87                 $8,463                    $8,658
10/31/87                $8,557                    $8,658
11/30/87                $8,857                    $8,934
12/31/87                $9,036                    $9,051
1/31/88                 $9,399                    $9,412
2/29/88                 $9,519                    $9,523
3/31/88                 $9,243                    $9,386
4/30/88                 $9,316                    $9,461
5/31/88                 $9,270                    $9,470
6/30/88                 $9,475                    $9,655
7/31/88                 $9,497                    $9,720
8/31/88                 $9,539                    $9,758
9/30/88                 $9,733                    $9,979
10/31/88                $9,942                   $10,206
11/30/88                $9,823                   $10,097
12/31/88                $9,955                   $10,272
1/31/89                $10,201                   $10,514
2/28/89                $10,097                   $10,367
3/31/89                $10,088                   $10,375
4/30/89                $10,344                   $10,680
5/31/89                $10,587                   $10,927
6/30/89                $10,734                   $11,093
7/31/89                $10,906                   $11,240
8/31/89                $10,688                   $11,069
9/30/89                $10,614                   $11,035
10/31/89               $10,711                   $11,181
11/30/89               $10,928                   $11,419
12/31/89               $10,982                   $11,503
1/31/90                $10,808                   $11,387
2/28/90                $10,979                   $11,515
3/31/90                $10,966                   $11,527
4/30/90                $10,741                   $11,386
5/31/90                $11,127                   $11,708
6/30/90                $11,220                   $11,823
7/31/90                $11,453                   $12,032
8/31/90                $11,111                   $11,745
9/30/90                $11,069                   $11,727
10/31/90               $11,369                   $11,975
11/30/90               $11,676                   $12,279
12/31/90               $11,725                   $12,333
1/31/91                $11,861                   $12,498
2/28/91                $11,903                   $12,586
3/31/91                $11,869                   $12,616
4/30/91                $12,037                   $12,812
5/31/91                $12,150                   $12,962
6/30/91                $12,103                   $12,938
7/31/91                $12,263                   $13,138
8/31/91                $12,430                   $13,327
9/30/91                $12,627                   $13,520
10/31/91               $12,771                   $13,661
11/30/91               $12,712                   $13,678
12/31/91               $13,045                   $14,004
1/31/92                $12,991                   $13,996
2/29/92                $13,023                   $14,018
3/31/92                $13,010                   $14,053
4/30/92                $13,128                   $14,187
5/31/92                $13,312                   $14,394
6/30/92                $13,599                   $14,673
7/31/92                $14,121                   $15,211
8/31/92                $13,881                   $15,007
9/30/92                $13,917                   $15,073
10/31/92               $13,605                   $14,822
11/30/92               $14,093                   $15,239
12/31/92               $14,244                   $15,437
1/31/93                $14,422                   $15,582
2/28/93                $15,129                   $16,307
3/31/93                $14,869                   $16,110
4/30/93                $15,037                   $16,331
5/31/93                $15,113                   $16,466
6/30/93                $15,389                   $16,775
7/30/93                $15,336                   $16,792
8/31/93                $15,789                   $17,222
9/30/93                $16,003                   $17,446
10/31/93               $15,976                   $17,479
11/30/93               $15,807                   $17,268
12/31/93               $16,160                   $17,713
1/31/94                $16,368                   $17,922
2/28/94                $15,885                   $17,329
3/31/94                $15,080                   $16,294
4/29/94                $15,162                   $16,420
5/31/94                $15,266                   $16,612
6/30/94                $15,192                   $16,413
7/29/94                $15,513                   $16,834
8/31/94                $15,524                   $16,870
9/30/94                $15,289                   $16,478
10/31/94               $14,990                   $15,972
11/30/94               $14,738                   $15,551
12/30/94               $15,102                   $16,103
1/31/95                $15,571                   $16,811
2/28/95                $16,050                   $17,496
3/31/95                $16,159                   $17,706
4/28/95                $16,177                   $17,697
5/31/95                $16,773                   $18,451
6/30/95                $16,475                   $18,111
7/31/95                $16,584                   $18,203
8/31/95                $16,781                   $18,460
9/30/95                $16,937                   $18,604
10/31/95               $17,292                   $19,054
11/30/95               $17,711                   $19,546
12/31/95               $17,975                   $19,851
1/31/96                $18,042                   $19,936
2/29/96                $17,906                   $19,693
3/31/96                $17,474                   $19,333
4/30/96                $17,362                   $19,255
5/31/96                $17,388                   $19,265
6/30/96                $17,600                   $19,562
7/31/96                $17,844                   $19,755
8/31/96                $17,885                   $19,730
9/30/96                $18,143                   $20,168
10/31/96               $18,386                   $20,414
11/30/96               $18,753                   $20,853
12/31/96               $18,637                   $20,727
1/31/97                $18,574                   $20,686
2/28/97                $18,743                   $22,288

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

PORTFOLIO AT A GLANCE
                                 2/28/97          8/31/96
Number of Securities               67               69
Weighted Average Maturity      18.1 years       17.0 years
Average Duration                8.0 years        7.8 years
Expense Ratio                    0.48%*            0.49%

* Annualized.


30   California Insured Tax-Free                    American Century Investments


                          CALIFORNIA INSURED TAX-FREE

Management Q & A

An interview with Dave MacEwen,  vice president and senior portfolio  manager on
the California Tax-Free and Municipal funds management team.

How did the fund perform?

The fund posted slightly higher returns than its peers, but  underperformed  its
benchmark  index.  For the six-month  period ended February 28, 1997, the fund's
total  return  was  4.89%,  compared  with the  4.77%  average  return of the 28
"California Insured Municipal Debt Funds" tracked by Lipper Analytical Services,
and the 5.99%  return of the Lehman  Long-Term  Municipal  Bond Index.  (See the
Total  Returns   table  on  the  previous   page  for  other  fund   performance
comparisons.)

Why did the fund perform well against its peers?

One  contributing  factor was the  fund's  relatively  conservative  positioning
during the period compared with some of the funds in its Lipper  category.  This
conservative  approach  allowed  the fund to perform  fairly  well  despite  the
market's shifting  expectations  about the direction of interest rates (see page
4).

[bar graph - data below]

CALIFORNIA  INSURED TAX-FREE FISCAL  YEAR-BY-YEAR  RETURNS (Periods ended August
31)

              Insured Tax-Free       Lehman Long-Term Municipal Index
1987*              -8.51%                         -0.28%
1988                4.58%                          8.10%
1989               12.04%                         13.44%
1990                3.96%                          6.11%
1991               11.87%                         13.47%
1992               11.67%                         12.60%
1993               13.74%                         14.76%
1994               -1.68%                         -2.05%
1995                8.09%                          9.43%
1996                6.60%                          6.88%

This chart  illustrates  the  historical  year-by-year  volatility of the fund's
returns  since its inception  and compares  them with the index's  returns.  The
fund's total returns include operating  expenses,  while the index's do not. See
page 52 for a  definition  of the  index.  *  Return  from the  fund's  12/30/86
inception date to 8/31/87.


Semiannual Report                               California Insured Tax-Free   31


                          CALIFORNIA INSURED TAX-FREE

Did you change the fund's positioning much over the last six months?

We made only slight  adjustments  to the fund's  positioning  during the period.
Choosing a more  conservative  approach,  we maintained the fund's duration in a
relatively  narrow range around 8 years.  The lack of new  municipal  securities
made it difficult to significantly alter the fund's structure.

Were there any particular securities that you favored?

We purchased some tax-allocation  bonds for the fund because many of these types
of securities  were  recently  available at  attractive  prices.  Tax-allocation
bonds--securities  issued to finance improvements in redevelopment areas such as
urban  neighborhoods  --fell  out of favor in the early  1990s  after  declining
property values forced their prices notably lower.  However,  as property values
have risen in recent years,  so has the value of the  securities.  Our municipal
credit research team found a number of these bonds that we felt were undervalued
and that have subsequently  appreciated.  Of course,  all these securities carry
bond insurance and are rated AAA. By selling some of these bonds at a profit, we
successfully enhanced the fund's returns.

Are there any securities that you avoided purchasing for the fund?

Although  we  selectively  added some  health-care  revenue  bonds to the fund's
portfolio, in general we have avoided these types of securities.  Many hospitals
have come under renewed pressure to make their rates more competitive because of
the  recent  surge  in  the  popularity  of  managed  health-care  arrangements.
Hospitals outside of these  arrangements have been particularly hard hit, making
their  bonds   potentially  more  risky  due  to  their  increased  chances  for
bankruptcy.

We also  avoided  most  short-call  bonds--securities  that can be paid off at a
specified date before maturity.  Instead, we conservatively opted for securities
that were of better quality and could be more easily traded.

What is the outlook for the municipal market going forward?

As in the past, the general outlook for interest rates is uncertain. The economy
continues to show solid growth,  but inflation has remained  relatively low. The
question is, are these conditions sustainable?  The Federal Reserve doesn't seem
to  think  so--in  March,  it  made  a  pre-emptive  strike  against  inflation,
ratcheting short-term interest rates up by a quarter of

[pie charts - data below]

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 2/28/97)  
Revenue 42% 
COPs/Leases 32% 
Land-Secured 12% 
GO 9% 
Prerefunded/ETM 4% 
Other 1%

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 8/31/96)  
Revenue 45%
COPs/Leases 28% 
Land-Secured 10% 
GO 9% 
Prerefunded/ETM 7% 
Other 1%


32   California Insured Tax-Free                    American Century Investments


                          CALIFORNIA INSURED TAX-FREE

a percent.  Many Fed watchers  suspect this may be the first in a series of rate
hikes.

If U.S.  economic growth slows,  the municipal market could rally. But with wage
pressures  increasing  the  threat of  inflation,  any  signs of an  overheating
economy could cause increased  anxiety among municipal  investors,  pushing bond
prices lower. We expect municipal issuance to remain light in the coming months,
which may provide some support for municipal prices.

With this outlook in mind, what are your plans for the fund going forward?

With the possibility of higher rates looming, we will likely maintain the fund's
neutral  stance,  lengthening  or shortening  the fund's  duration as conditions
warrant. If the economic outlook does change  dramatically,  we believe that the
fund is positioned with the flexibility to respond appropriately.

[pie charts - data below]

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 2/28/97)
AAA 100%

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 8/31/96)
AAA 100%


Semiannual Report California Insured Tax-Free        33


                            SCHEDULE OF INVESTMENTS
                          CALIFORNIA INSURED TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

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

MUNICIPAL SECURITIES
$ 5,750,000   Anaheim Public Financing Auth.
              Lease Rev., Series 1997 A,
          (   Public Improvements Projects),
              5.00%, 3-1-37 (FSA)                                $5,106,058
  1,000,000   Banning Certificates of
              Participation, (Wastewater
              System, Refunding and
              Improvement Project), 8.00%,
              1-1-19 (AMBAC)                                      1,314,690
  1,000,000   Berkeley Certificates of
              Participation, Series 1989,
              7.50%, 6-1-19 (AMBAC)                               1,058,100
    900,000   Brea Redevelopment Agency
              Tax Allocation, (Project AB),
              6.125%, 8-1-13 (MBIA)                                 948,015
  5,000,000   California Educational Facilities
              Auth. Rev., Series 1997 M,
              (Stanford University), 5.25%,
              12-1-26                                             4,750,900
  2,500,000   California Educational Facilities
              Auth. Rev., (University of San
              Francisco), 6.00%, 10-1-26
              (MBIA)                                              2,585,350
  1,250,000   California Health Facilities
              Financing Auth. Rev., Series
              1991 A, (Adventist Health),
              7.00%, 3-1-13 (MBIA)                                1,376,363
  1,660,000   California Health Facilities
              Financing Auth. Rev., Series
              1996 A, (Insured Health Facility),
              6.00%, 7-1-25 (MBIA)                                1,696,155
  2,500,000   California Health Facilities
              Financing Auth. Rev., Series
              1989 A, (Sutter Hospital),
              6.70%, 1-1-13 (AMBAC)                               2,621,500
  1,560,000   California Public Capital
              Improvements Financing Auth.
              Rev., (Pooled Project 1988 B),
              8.10%, 3-1-18 (BIGI)                                1,645,769
  6,500,000   California State GO, 6.00%,
              10-1-10 (MBIA)                                      7,044,895

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

$ 2,000,000   California State Public Works
              Board Lease Rev., Series 1993
              A, (Department of Corrections
              State Prisons), 5.00%, 12-1-19
              (AMBAC)                                            $1,852,560
  6,000,000   California State Public Works
              Board Lease Rev., (Department
              of Corrections), 5.25%, 6-1-15
              (FSA)                                               5,885,580
  4,500,000   California State Public Works
              Board Lease Rev., (Department
              of Corrections), 5.25%, 1-1-21
              (AMBAC)                                             4,273,920
  3,925,000   California Statewide Communities
              Development Auth. Rev.
              Certificates of Participation,
              (Gemological Institute), 6.75%,
              5-1-10 (Connie Lee)                                 4,479,485
  1,520,000   Castaic Lake Water Agency
              Certificates of Participation,
              Series 1994 A, (Water System
              Improvement Project), 7.00%,
              8-1-12 (MBIA)                                       1,790,773
  1,000,000   Contra Costa County Certificates
              of Participation, 7.80%, 6-1-07
              (BIGI)                                              1,087,980
  3,000,000   Contra Costa County Certificates
              of Participation, (Merrithew
              Memorial Hospital Project),
              5.50%, 11-1-22 (MBIA)                               2,905,590
  1,200,000   Contra Costa Water District Rev.,
              Series 1992 E, 6.25%, 10-1-12
              (AMBAC)                                             1,334,088
  1,000,000   East Valley Water District
              Certificates of Participation,
              (Treatment Plant Project), 6.60%,
              12-1-14 (AMBAC)                                     1,106,080
  5,750,000   Encina Joint Power Financing
              Auth. Wastewater Rev., Series
              1989 A, (Phase IV Expansion
              Project), 6.875%, 8-1-99,
              Prerefunded at 102%
              of Par (AMBAC)(1)                                   6,248,065
  2,000,000   Escondido Joint Powers Financing
              Auth. Rev., 6.125%, 9-1-11
              (AMBAC)                                             2,097,660

See Notes to Financial Statements


34   California Insured Tax-Free                    American Century Investments


                            SCHEDULE OF INVESTMENTS
                          CALIFORNIA INSURED TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

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

$ 4,100,000   Foothill-De Anza Community
              College District Certificates of
              Pariticipation, 6.25%, 9-1-13
              (Connie Lee)                                       $4,318,079
  1,725,000   Fresno Sewer Rev., Series 1993
              A-1, 6.25%, 9-1-14 (AMBAC)                          1,909,402
  1,240,000   Fresno Sewer Rev., Series 1993
              A-1, 4.75%, 9-1-21 (AMBAC)                          1,093,630
  5,000,000   Glendale Hospital Rev., Series
          1   991 A, (Adventist Hospital),
              6.75%, 3-1-13 (MBIA)                                5,431,500
  4,830,000   Glendale Unified School District
              Certificates of Participation,
              Series 1994 A, 6.50%, 3-1-12
              (AMBAC)                                             5,323,722
  1,340,000   Kern High School District GO,
              Series 1993 C, 6.25%, 8-1-13
              (MBIA)                                              1,493,283
  3,630,000   Kern High School District GO,
              Series 1993 D, 7.00%, 8-1-17                        4,355,782
    790,000   Lake Elsinore Public Financing
              Auth. Tax Allocation Rev., Series
              1992 C, (Redevelopment
              Projects), 6.625%, 2-1-17
              (FGIC)                                                850,158
  1,500,000   Lakewood Redevelopment Agency
              Tax Allocation Rev., Series 1992
              A, (Project No. 1), 6.50%, 9-1-17
              (FSA)                                               1,649,460
  2,000,000   La Quinta Financing Auth. Lease
              Rev., (La Quinta City Hall
              Project), 5.55%, 10-1-18 (MBIA)                     1,998,640
  1,000,000   Los Angeles Community College
              District Certificate of Participation,
              6.90%, 8-15-00 (FSA)                                1,107,090
  1,405,000   Los Angeles Community
              Redevelopment Agency Housing
              Rev., Series 1994 C, 7.00%,
              1-1-14 (AMBAC)                                      1,522,964
  3,500,000   Los Angeles Community
              Redevelopment Agency Tax
              Allocation Rev., Series 1993 H,
              (Bunker Hill), 6.50%, 12-1-14
              (FSA)                                               3,891,510

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

$ 4,000,000   Los Angeles Community
              Redevelopment Agency Tax
              Allocation Rev., Series 1993 H,
              (Bunker Hill), 6.50%, 12-1-15
              (FSA)                                              $4,384,120
  1,000,000   Los Angeles County Transportation
              Commission Sales Tax Rev.,
              6.50%, 7-1-13 (AMBAC)                               1,090,550
  1,100,000   Los Angeles Wastewater System
              Rev., Series 1991 C, 7.00%,
              6-1-11 (AMBAC)                                      1,178,837
  1,915,000   Midpeninsula Regional Open
              Space District Financing Auth.
              Rev., 5.90%, 9-1-14 (AMBAC)                         1,985,434
  5,000,000   Modesto, Stockton, Redding Public
              Power Agency Rev., Series 1989
              D, (San Juan Project), 6.75%,
              7-1-20 (MBIA)                                       5,754,150
  1,200,000   National City Joint Powers Auth.
              Lease Rev., (Police Facilities
              Project), 6.75%, 10-1-17
              (AMBAC)                                             1,322,220
  2,810,000   Oakland Redevelopment Agency
              Tax Allocation Rev., (Central
              District), 5.50%, 2-1-14
              (AMBAC)                                             2,848,581
  1,925,000   Oakland Refunding Pension
              Financing Rev., Series 1988 A,
              7.60%, 8-1-21 (FGIC)                                2,051,781
  2,700,000   Orange County Financing Auth.
              Tax Allocation Rev., Series 1992
              A, 6.25%, 9-1-14 (MBIA)                             2,843,424
  1,950,000   Ramona Municipal Water District
              Certificates of Participation,
              7.20%, 10-1-10 (AMBAC)                              2,148,763
  1,100,000   Redlands Unified School District
              Certificates of Participation,
              6.00%, 9-1-12 (FSA)                                 1,133,187
    580,000   Redondo Beach Redevelopment
              Agency Tax Allocation Rev.,
              (South Bay Center
              Redevelopment), 8.625%,
              5-1-14 (FGIC)                                         590,764
  1,375,000   Rocklin Unified School District
              Community Facilities District
              Special Tax, 5.40%, 9-1-12
              (MBIA)                                              1,373,996

See Notes to Financial Statements

Semiannual Report                          California Insured Tax-Free        35


                            SCHEDULE OF INVESTMENTS
                          CALIFORNIA INSURED TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

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

$ 2,505,000   Sacramento Redevelopment
              Agency Tax Allocation Rev.,
              (Merged Downtown
              Redevelopment Project), 6.50%,
              11-1-13 (MBIA)                                     $2,718,426
  3,000,000   Saddleback Community College
              District Certificates of
              Participation, 7.00%, 8-1-19
              (BIGI)                                              3,223,860
  1,345,000   San Diego Community College
              District Lease Rev., 6.125%,
              12-1-16 (MBIA)                                      1,415,155
  7,000,000   San Diego County Certificates of
              Participation, 5.625%, 9-1-12
              (AMBAC)                                             7,208,390
  5,250,000   San Francisco Bay Area Rapid
              Transportation District Sales
              Tax Rev., 6.75%, 7-1-09
              (AMBAC)                                             5,691,683
 10,000,000   San Francisco City and County
              International Airport Rev.
              Refunding, (Second Series Issue
              2), 6.75%, 5-1-20 (MBIA)                           11,159,800
  1,000,000   San Mateo County Transportation
              District Sales Tax Rev., Series
              1993 A, 5.25%, 6-1-18 (MBIA)                          962,130
  3,535,000   San Mateo County Joint Powers
              Financing Auth. Lease Rev.
              Refunding, (Capital Projects
              Program), 6.50%, 7-1-15 (MBIA)                      3,999,322
  1,000,000   Santa Clara Electric Rev., Series
              1991 A, 6.25%, 7-1-19 (MBIA)                        1,054,090
  2,000,000   Santa Margarita/Dana Point Auth.
              Rev., Series 1994 B, (Improvement
              Districts 3, 3A, 4, 4A), 7.25%,
              8-1-14 (MBIA)                                       2,424,520
  3,685,000   Simi Valley Unified School District,
              GO, 5.00%, 8-1-15 (FGIC)                            3,462,979
  2,500,000   South Coast Air Quality
              Management District Building
              Rev., (Installment Sale,
              Headquarters), 6.00%, 8-1-11
              (AMBAC)                                             2,715,675
     60,000   Thousand Oaks Redevelopment
              Agency Rev., (Single Family
              Residential Mortgage Rev.),
              7.90%, 1-1-16 (AMBAC)                                  61,639

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

$ 2,500,000   Ukiah Electric Rev., 6.25%, 6-1-18
              (MBIA)                                         $    2,744,700
  1,445,000   Walnut Valley Unified School
              District GO, Series 1992 B,
              6.00%, 8-1-10 (AMBAC)                               1,570,975
  4,525,000   Woodland Certificates of
              Participation, (Wastewater
              System Reference Project),
              5.75%, 3-1-12 (AMBAC)                               4,755,549
                                                                 ----------
TOTAL MUNICIPAL SECURITIES--96.4%                               182,029,496
   (Cost $172,298,838)                                          -----------

MUNICIPAL DERIVATIVES(2)
  2,000,000   East Bay Municipal Utility District
              Wastewater Treatment System
              Rev., Yield Curve Notes, Inverse
              Floater, 6.47%, 6-1-13 (AMBAC)                      1,915,000
  1,000,000   San Diego County Water Auth.
              Certificates of Participation, (Reg
              Rites), Yield Curve Notes, Inverse
              Floater, 7.646%, 5-1-09 (FGIC)                      1,080,000
  2,750,000   Southern California Public Power
              Auth. Rev., Yield Curve Notes,
              Inverse Floater, 6.792%, 7-1-17
              (FGIC)                                              2,475,000
                                                                  ---------

TOTAL MUNICIPAL DERIVATIVES--2.9%                                 5,470,000
   (Cost $5,858,366)                                              ---------

SHORT-TERM MUNICIPAL SECURITIES--0.7%
  1,400,000   California Statewide Communities
              Development Auth. Certificates
              of Participation, VRDN, 3.35%,
              3-3-97                                              1,400,000
                                                                  ---------
   (Cost $1,400,000)

TOTAL INVESTMENT SECURITIES--100.0%                            $188,899,496
   (Cost $179,557,204)                                          ===========

See Notes to Financial Statements


36   California Insured Tax-Free                    American Century Investments


SCHEDULE OF INVESTMENTS
CALIFORNIA INSURED TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Notes to Schedule of Investments 
AMBAC = AMBAC  Indemnity  Corp.  
BIGI = Bond Investor's Guaranty Inc.
FGIC = Financial Guaranty Insurance Company
FSA = Financial Security Association
GO = Government Obligation
MBIA = Municipal Bond Insurance Association
VRDN = Variable Rate Demand Note.  Interest  reset date is indicated and used in
calculating the weighted  average  portfolio  maturity.  Rate shown is effective
February  28,  1997.  
(1)  Escrowed in U.S. Government Securities.
(2)  These securities are inverse  floaters.  They bear interest rates that move
     inversely  to  market  interest  rates.  Inverse  floaters  typically  have
     durations twice as long as long-term bonds,  which may cause their value to
     be twice as volatile as long-term  bonds when interest  rates  change.  The
     Insured Fund is limited to 10% of its net assets in inverse floaters.

See Notes to Financial Statements


Semiannual Report                               California Insured Tax-Free   37

<TABLE>
<CAPTION>
                      STATEMENTS OF ASSETS AND LIABILITIES

FEBRUARY 28, 1997 (UNAUDITED)

                                                              TAX-FREE          MUNICIPAL
                                                                MONEY             MONEY         HIGH-YIELD          INSURED
                                                               MARKET            MARKET          MUNICIPAL         TAX-FREE

ASSETS
<S>                                                          <C>                <C>               <C>                      
Investment  securities,  at value  (amortized cost for 
     Tax-Free Money Market and Municipal Money Market; 
     identified cost of $162,268,197 and $179,557,204,
     respectively) (Note 3)...............................$426,237,269     $187,630,035      $169,388,270     $188,899,496
Cash......................................................   4,630,499          757,964           555,961               --
Receivable for capital shares sold........................      14,894               --             5,453               --
Interest receivable.......................................   2,558,351          995,163         3,171,018        2,997,956
Prepaid expenses and other assets.........................       7,746            5,136             4,503            5,087
                                                                 -----            -----             -----            -----
                                                           433,448,759      189,388,298       173,125,205      191,902,539
                                                           -----------      -----------       -----------      -----------

LIABILITIES
Disbursements in excess of demand deposit cash............     250,036          136,007           288,588        1,843,543
Payable for investments purchased.........................          --               --         3,469,276               --
Payable for capital shares redeemed.......................   1,388,678           58,153           385,666           53,215
Payable to affiliates (Note 2)............................     154,656           70,277            60,288           67,253
Dividends payable.........................................          --               --               644            2,696
Accrued expenses and other liabilities....................      15,227            1,452             7,953            4,915
                                                                ------            -----             -----            -----
                                                             1,808,597          265,889         4,212,415        1,971,622
                                                             ---------          -------         ---------        ---------
Net Assets Applicable to Outstanding Shares...............$431,640,162     $189,122,409      $168,912,790     $189,930,917
                                                          ============     ============      ============     ============

CAPITAL SHARES
Outstanding (Unlimited number of shares authorized)....... 431,681,796      189,165,666        17,850,186       18,579,229
                                                           ===========      ===========        ==========       ==========
Net Asset Value Per Share.................................       $1.00            $1.00             $9.46           $10.22
                                                                 =====            =====             =====           ======

NET ASSETS CONSIST OF:
Capital paid in...........................................$431,681,796     $189,165,666      $162,363,966     $180,117,300
Undistributed net investment income.......................     356,694          115,351                --               --
Accumulated net realized gain (loss) on
   investment transactions................................    (398,328)        (158,608)         (571,249)         471,325
Net unrealized appreciation on
   investments (Note 3)...................................          --               --         7,120,073        9,342,292
                                                             ---------          -------         ---------        ---------
                                                          $431,640,162     $189,122,409      $168,912,790     $189,930,917
                                                          ============     ============      ============     ============


See Notes to Financial Statements
</TABLE>


38   Statements of Assets and Liabilities           American Century Investments

<TABLE>
<CAPTION>

                            STATEMENTS OF OPERATIONS

FOR THE SIX MONTHS ENDED FEBRUARY 28, 1997 (UNAUDITED)

                                                              TAX-FREE          MUNICIPAL
                                                                MONEY             MONEY         HIGH-YIELD          INSURED
                                                               MARKET            MARKET          MUNICIPAL         TAX-FREE

INVESTMENT INCOME
Income:
<S>                                                         <C>              <C>               <C>              <C>       
Interest..................................................  $7,566,613       $3,372,194        $4,873,585       $5,474,929

Expenses (Note 2):
Investment advisory fees..................................     622,979          276,307           221,736          274,667
Administrative fees.......................................     205,509           91,213            73,130           90,554
Transfer agency fees......................................     107,057           64,989            37,996           43,438
Printing and postage......................................      42,683           22,444            11,299           14,260
Auditing and legal fees...................................      21,523           10,113             8,343            9,880
Custodian fees............................................      17,207            8,311             6,374            7,486
Telephone expenses........................................       7,744            3,309             3,298            1,547
Directors' fees and expenses..............................       5,287            3,846             3,623            3,836
Registration and filing fees..............................       2,057            1,527             4,256              599
Other operating expenses..................................      11,564            6,485            13,387           10,339
                                                                ------            -----            ------           ------
                                                             1,043,610          488,544           383,442          456,606
                                                             ---------          -------           -------          -------
Net investment income.....................................   6,523,003        2,883,650         4,490,143        5,018,323
                                                             ---------        ---------         ---------        ---------

REALIZED AND UNREALIZED GAIN (LOSS)
ON INVESTMENTS (NOTE 3)
Net realized gain (loss) on investments...................         (77)              (2)         (211,589)       1,125,667
Change in net unrealized appreciation on investments......           --               --        3,239,472        3,089,084
                                                             ---------        ---------         ---------        ---------
Net realized and unrealized
gain (loss) on investments................................         (77)              (2)        3,027,883        4,214,751
                                                             ---------        ---------         ---------        ---------
Net Increase in Net Assets
Resulting from Operations.................................  $6,522,926       $2,883,648        $7,518,026       $9,233,074
                                                            ==========       ==========        ==========       ==========

See Notes to Financial Statements
</TABLE>


Semiannual Report                                  Statements of Operations   39

<TABLE>
<CAPTION>

                       STATEMENTS OF CHANGES IN NET ASSETS

SIX MONTHS ENDED FEBRUARY 28, 1997 (UNAUDITED)
AND YEAR ENDED AUGUST 31, 1996

                                                                     TAX-FREE                             MUNICIPAL
                                                                   MONEY MARKET                         MONEY MARKET

Increase (Decrease) in Net Assets                               1997              1996             1997              1996
OPERATIONS
<S>                                                       <C>             <C>              <C>              <C>           
Net investment income.....................................$    6,523,003  $  13,288,453    $    2,883,650   $    6,182,773
Net realized gain (loss) on investments...................         (77)           5,024                (2)           3,762
Change in net unrealized appreciation
   on investments ........................................          --               --                --               --
                                                             ---------        ---------         ---------        ---------
Net increase in net assets resulting
   from operations........................................   6,522,926       13,293,477         2,883,648        6,186,535
                                                             ---------       ----------         ---------        ---------


DISTRIBUTIONS TO SHAREHOLDERS
From net investment income................................  (6,637,238)     (13,076,367)       (2,883,397)      (6,134,579)
                                                            ----------      -----------        ----------       ---------- 

CAPITAL SHARE TRANSACTIONS
Proceeds from shares sold................................. 229,342,276      417,665,171        87,523,739      221,042,487
Proceeds from reinvestment of distributions...............   6,286,833       12,497,339         2,758,042        5,897,189
Payments for shares redeemed..............................(229,721,041)    (418,632,419)      (97,679,625)    (222,193,970)
                                                          ------------     ------------       -----------     ------------ 
Net increase (decrease) in net assets
   from capital share transactions........................   5,908,068       11,530,091        (7,397,844)       4,745,706
                                                             ---------       ----------        ----------        ---------

Net increase (decrease) in net assets.....................   5,793,756       11,747,201        (7,397,593)       4,797,662

NET ASSETS
Beginning of period....................................... 425,846,406      414,099,205       196,520,002      191,722,340
                                                           -----------      -----------       -----------      -----------

End of period.............................................$431,640,162     $425,846,406      $189,122,409     $196,520,002
                                                          ============     ============      ============     ============

TRANSACTIONS IN SHARES OF THE FUNDS
Sold...................................................... 229,342,276      417,665,171        87,523,739      221,042,487
Issued in reinvestment of distributions...................   6,286,833       12,497,339         2,758,042        5,897,189
Redeemed..................................................(229,721,041)    (418,632,419)      (97,679,625)    (222,193,970)
                                                          ------------     ------------       -----------     ------------ 
Net increase (decrease)...................................   5,908,068       11,530,091        (7,397,844)       4,745,706
                                                             =========       ==========        ==========        =========

See Notes to Financial Statements
</TABLE>


40   Statements of Changes in Net Assets            American Century Investments

<TABLE>
<CAPTION>

                       STATEMENTS OF CHANGES IN NET ASSETS

                                                                       TAX-FREE                           MUNICIPAL
                                                                     MONEY MARKET                       MONEY MARKET

SIX MONTHS ENDED FEBRUARY 28, 1997 (UNAUDITED)
AND YEAR ENDED AUGUST 31, 1996

Increase (Decrease) in Net Assets                               1997              1996             1997              1996
OPERATIONS
<S>                                                       <C>            <C>               <C>              <C>           
Net investment income.....................................$  4,490,143   $    7,834,261    $    5,018,323   $    9,926,196
Net realized gain (loss) on investments...................    (211,589)       1,514,159         1,125,667          576,436
Change in net unrealized appreciation
on investments ...........................................   3,239,472          798,655         3,089,084        1,358,411
                                                             ---------          -------         ---------        ---------
Net increase in net assets resulting
from operations...........................................   7,518,026       10,147,075         9,233,074       11,861,043
                                                             ---------       ----------         ---------       ----------


DISTRIBUTIONS TO SHAREHOLDERS
From net investment income................................  (4,495,549)      (7,832,946)       (5,022,869)      (9,925,479)
                                                            ----------       ----------        ----------       ---------- 

CAPITAL SHARE TRANSACTIONS
Proceeds from shares sold.................................  79,897,068       69,487,545        29,449,257       65,937,524
Proceeds from reinvestment of distributions...............   3,224,506        5,609,354         3,662,398        6,845,811
Payments for shares redeemed.............................. (61,906,504)     (48,901,653)      (39,201,909)     (61,820,496)
                                                           -----------      -----------       -----------      ----------- 
Net increase (decrease) in net assets
from capital share transactions...........................  21,215,070       26,195,246        (6,090,254)      10,962,839
                                                            ----------       ----------        ----------       ----------

Net increase (decrease) in net assets.....................  24,237,547       28,509,375        (1,880,049)      12,898,403

NET ASSETS
Beginning of period....................................... 144,675,243      116,165,868       191,810,966      178,912,563
                                                           -----------      -----------       -----------      -----------

End of period.............................................$168,912,790     $144,675,243      $189,930,917     $191,810,966
                                                          ============     ============      ============     ============

TRANSACTIONS IN SHARES OF THE FUNDS
Sold......................................................   8,458,710        7,510,749         2,908,609        6,546,262
Issued in reinvestment of distributions...................     341,168          604,403           339,532          678,581
Redeemed..................................................  (6,554,314)      (5,267,312)       (3,846,242)      (6,132,458)
                                                            ----------       ----------        ----------       ---------- 
Net increase (decrease)...................................   2,245,564        2,847,840          (598,101)       1,092,385
                                                             =========        =========          ========        =========

See Notes to Financial Statements
</TABLE>


Semiannual Report                       Statements of Changes in Net Assets   41


                         NOTES TO FINANCIAL STATEMENTS

FEBRUARY 28, 1997 (UNAUDITED)

1. Organization and Summary of Significant Accounting Policies

Organization--American  Century  California  Tax-Free and  Municipal  Funds (the
Trust) is  registered  under the  Investment  Company Act of 1940 as an open-end
management  investment  company.  American Century - Benham California  Tax-Free
Money Market Fund (Tax-Free Money Market),  American Century - Benham California
Municipal  Money Market  (Municipal  Money  Market),  American  Century - Benham
California High-Yield Municipal Fund (High-Yield), and American Century - Benham
California  Insured Tax-Free Fund (Insured)  (collectively the "Funds") are four
of the seven funds  composing the Trust.  With the exception of Municipal  Money
Market,  each Fund is diversified  under the 1940 Act. Tax-Free Money Market and
Municipal  Money Market  (collectively  "Money Market  Funds") seek to obtain as
high a level of interest income exempt from federal and California  income taxes
as  is  consistent  with  prudent  investment  management  and  conservation  of
shareholders'  capital.  High-Yield  seeks to provide as high a level of current
income exempt from federal and California income taxes as is consistent with its
investment  policies,   which  permit  investment  in  lower-rated  and  unrated
municipal securities. Insured seeks to provide as high a level of current income
exempt from federal and California  income taxes as is consistent with safety of
principal through investment in insured  California  municipal  securities.  The
Money  Market  Funds  invest  primarily  in  short-term   California   municipal
obligations  and  maintain  a  weighted  average  maturity  of 60 days or  less.
High-Yield  and Insured  invest  primarily  in  long-term  California  municipal
securities  and maintain a weighted  average  maturity of ten years or more. The
Funds  concentrate  their  investments  in a single state and therefore may have
more exposure to credit risk related to the state of California than a fund with
a broader geographical  diversification.  The following  significant  accounting
policies,  related to the Funds,  are in  accordance  with  accounting  policies
generally accepted in the investment company industry.

Security  Valuations  --Securities  held by the Money Market Funds are valued at
amortized  cost,  which  approximates  current market value.  Securities held by
High-Yield and Insured are valued through valuations  obtained from 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.

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

Investment Income--Interest income is recorded on the accrual basis and includes
amortization  of discounts and premiums.  Premium and original issue discount is
amortized  daily using the  effective  interest rate method for  High-Yield  and
Insured.  Market  discount is  recognized as income upon the sale or maturity of
the security for  High-Yield  and  Insured.  Premium and discount are  amortized
daily on a straight-line basis for securities held by the Money Market Funds.

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

Distributions  to  Shareholders--Distributions  from net  investment  income are
declared daily and distributed  monthly. The Money Market Funds do not expect to
realize any long-term  capital gains, and accordingly,  do not expect to pay any
capital  gains   distributions.   Distributions  from  net  realized  gains  for
High-Yield and Insured are declared and paid annually.

At August 31, 1996, accumulated net realized capital loss carryovers of $298,508
for Tax-Free  Money Market,  $158,606 for Municipal  Money Market,  $359,444 for
High-Yield, and $654,341 for Insured (expiring 1998 through 2004) may be used to
offset future taxable 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  are due to differences in the
recognition  of  income  and  expense  items  for  financial  statement  and tax
purposes.

Futures Contracts--High-Yield and Insured may buy and sell interest rate futures
contracts relating to debt securities. Each Fund may use futures transactions to
maintain cash reserves while remaining fully invested, to facilitate trading, to
reduce  transaction costs, or to pursue higher investment returns when a futures
contract is priced more attractively than its underlying  security or index. One
of the risks of entering  into  futures may  include  the  possibility  that the
change in value of the contract may not  correlate  with the changes in value of
the underlying  securities.  Upon entering into a futures contract,  the Fund is
required to deposit  either cash or  securities  in an amount equal to a certain
percentage  of  the  contract  value  (initial  margin).   Subsequent   payments
(variation


42   Notes to Financial Statements                  American Century Investments


                         NOTES TO FINANCIAL STATEMENTS

FEBRUARY 28, 1997 (UNAUDITED)

margin) are made or received daily,  in cash, by the Fund. The variation  margin
is equal to the daily change in the contract value and is recorded as unrealized
gains and losses.  The Fund recognizes a realized gain or loss when the contract
is closed or expires.

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

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

- --------------------------------------------------------------------------------
2. Transactions with Related Parties

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

          0.50% of the first $100 million 
          0.45% of the next $100 million 
          0.40% of the next $100 million  
          0.35% of the next $100 million 
          0.30% of the next $100 million  
          0.25% of the next $1 billion 
          0.24% of the next $1 billion
          0.23% of the next $1 billion  
          0.22% of the next $1 billion 
          0.21% of the next $1 billion 
          0.20% of the next $1 billion
          0.19% of the average daily net assets over $6.5 billion

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

The Trust has an additional agreement with BMC pursuant to which BMC established
a contractual  expense guarantee that limits Fund expenses (excluding items such
as brokerage  commissions,  taxes,  interest,  custodian  earnings credits,  and
extraordinary  expenses)  to 0.53% of average  daily  closing net assets for the
Tax-Free  Money  Market,  0.60% for the Municipal  Money  Market,  and 0.59% for
High-Yield  and Insured.  The agreement  provides  that BMC may recover  amounts
(representing  expenses in excess of the Fund's expense guarantee rate) absorbed
during the preceding 11 months, if, and to the extent that, for any given month,
the Fund's  expenses are less than the expense  guarantee rate in effect at that
time. The expense guarantee rate is subject to renewal in June 1997.

The  payables  to  affiliates  as of  February  28,  1997,  based  on the  above
agreements were as follows:

                  Tax-Free          Municipal       High-Yield         Insured
                   Money              Money                                   
                  Market            Market
Investment
Advisor ..........$95,638          $42,198           $36,830          $42,319
Administrative
Services and
Transfer Agent ... 59,018           28,079            23,458           24,934
                 --------          -------           -------          -------
                 $154,656          $70,277           $60,288          $67,253
                 ========          =======           =======          =======

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


Semiannual Report                             Notes to Financial Statements   43


                         NOTES TO FINANCIAL STATEMENTS

FEBRUARY 28, 1997 (UNAUDITED)
- --------------------------------------------------------------------------------
3.Investment Transactions

The  aggregate  cost  of  municipal  debt  obligations   (excluding   short-term
investments) purchased for the six months ended February 28, 1997, in High-Yield
and Insured totaled  $54,087,652 and  $31,830,125,  respectively.  Proceeds from
municipal debt obligations (excluding short-term investments) sold in High-Yield
and Insured totaled $28,219,655 and $34,603,296, respectively.

As of February 28, 1997,  accumulated net unrealized  appreciation of High-Yield
and  Insured  were   $7,120,073   and   $9,342,292,   consisting  of  unrealized
appreciation  of $7,298,207  and  $9,807,705,  and  unrealized  depreciation  of
$178,134 and $465,413,  respectively.  The  aggregate  cost of  investments  for
federal  income tax  purposes was the same as the cost for  financial  reporting
purposes.
- --------------------------------------------------------------------------------
4. Corporate Events
<TABLE>

The following name changes became effective January 1, 1997:

                    NEW NAMES                                 FORMER NAMES
<S>               <C>                                        <C>  
Funds' Issuer:      American Century California               Benham California Tax-Free
                    Tax-Free and Municipal Funds              and Municipal Trust

Funds:              American Century - Benham                 Benham California Tax-Free
                    California Tax-Free Money                 Money Market Fund
                    Market Fund

                    American Century - Benham                 Benham California Municipal
                    California Municipal Money                Money Market Fund
                    Market Fund

                    American Century - Benham                 Benham California Municipal
                    California High-Yield Municipal Fund      High-Yield Fund

                    American Century - Benham                 Benham California Tax-Free
                    California Insured Tax-Free Fund          Insured Fund

Parent Company:     American Century Companies, Inc.          Twentieth Century Companies, Inc.

Distributor:        American Century Investment               Twentieth Century Securities, Inc.
                    Services, Inc.

Transfer Agent:     American Century Services Corporation     Twentieth Century Services, Inc.
</TABLE>


44   Notes to Financial Statements                  American Century Investments
<TABLE>
<CAPTION>
                              FINANCIAL HIGHLIGHTS
                        CALIFORNIA TAX-FREE MONEY MARKET

For a Share Outstanding Throughout the Years Ended August 31 (except as noted)


                                                         1997(1)       1996         1995         1994         1993          1992

PER-SHARE DATA
Net Asset Value,
<S>                                                      <C>          <C>          <C>          <C>           <C>          <C>  
Beginning of Period..............................        $1.00        $1.00        $1.00        $1.00         $1.00        $1.00
                                                         -----        -----        -----        -----         -----        -----
Income from Investment Operations
     Net Investment Income ......................         0.02         0.03         0.03         0.02          0.02         0.03
                                                          ----         ----         ----         ----          ----         ----
Distributions
     From Net Investment Income..................        (0.02)       (0.03)       (0.03)       (0.02)        (0.02)       (0.03)
                                                         -----        -----        -----        -----         -----        ----- 
Net Asset Value, End of Period...................        $1.00        $1.00        $1.00        $1.00         $1.00        $1.00
                                                         =====        =====        =====        =====         =====        =====
     Total Return (2)............................         1.54%        3.12%        3.31%        2.09%         2.13%        3.00%

RATIOS/SUPPLEMENTAL DATA
     Ratio of Operating Expenses
     to Average Net Assets ......................     0.48%(3)        0.49%        0.52%        0.50%         0.51%        0.54%
     Ratio of Net Investment Income
     to Average Net Assets.......................     3.03%(3)        3.12%        3.28%        2.07%         2.09%        2.98%
     Net Assets, End
     of Period (in thousands)....................     $431,640     $425,846     $414,099     $371,074      $338,731     $321,307

(1)  Six months ended February 28, 1997 (unaudited).

(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
</TABLE>


Semiannual Report                                      Financial Highlights   45

<TABLE>
<CAPTION>

                              FINANCIAL HIGHLIGHTS
                        CALIFORNIA MUNICIPAL MONEY MARKET

For a Share Outstanding Throughout the Years Ended August 31 (except as noted)


                                                         1997(1)       1996         1995         1994         1993          1992

PER-SHARE DATA
Net Asset Value,
<S>                                                      <C>          <C>          <C>          <C>           <C>          <C>  
Beginning of Period..............................        $1.00        $1.00        $1.00        $1.00         $1.00        $1.00
                                                         -----        -----        -----        -----         -----        -----
Income from Investment Operations
     Net Investment Income ......................         0.01         0.03         0.03         0.02          0.02         0.03
                                                          ----         ----         ----         ----          ----         ----
Distributions
     From Net Investment Income..................        (0.01)       (0.03)       (0.03)       (0.02)        (0.02)       (0.03)
                                                         -----        -----        -----        -----         -----        ----- 
Net Asset Value, End of Period...................        $1.00        $1.00        $1.00        $1.00         $1.00        $1.00
                                                         =====        =====        =====        =====         =====        =====
     Total Return (2)............................        1.51%        3.23%        3.35%        2.15%         2.25%        3.63%

RATIOS/SUPPLEMENTAL DATA
     Ratio of Operating Expenses
     to Average Net Assets ......................    0.51% (3)        0.53%        0.53%        0.51%         0.46%        0.07%
     Ratio of Net Investment Income
     to Average Net Assets.......................    3.01% (3)        3.20%        3.31%        2.13%         2.21%        3.44%
     Net Assets, End
     of Period (in thousands)....................     $189,122     $196,520     $191,722     $243,701      $247,621     $254,823

(1)  Six months ended February 28, 1997 (unaudited).

(2)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions,  if any.  Total  returns for  periods  less than one are not
     annualized.

(3)  Annualized.

See Notes to Financial Statements
</TABLE>


46   Financial Highlights                           American Century Investments

<TABLE>
<CAPTION>

                              FINANCIAL HIGHLIGHTS
                         CALIFORNIA HIGH-YIELD MUNICIPAL

For a Share Outstanding Throughout the Years Ended August 31 (except as noted)


                                                         1997(1)       1996         1995         1994         1993          1992

PER-SHARE DATA
Net Asset Value,
<S>                                                      <C>          <C>          <C>          <C>           <C>          <C>  
Beginning of Period..............................        $9.27        $9.11        $9.06        $9.66         $9.12        $8.84
                                                         -----        -----        -----        -----         -----        -----
Income from Investment Operations
     Net Investment Income ......................         0.27         0.56         0.56         0.56          0.57         0.58
     Net Realized and Unrealized Gain (Loss)
     on Investment Transactions..................         0.19         0.16         0.05       (0.48)          0.54         0.28
                                                          ----         ----         ----       -----           ----         ----
     Total From
     Investment Operations.......................         0.46         0.72         0.61         0.08          1.11         0.86
                                                          ----         ----         ----         ----          ----         ----
Distributions
     From Net Investment Income..................        (0.27)       (0.56)       (0.56)       (0.56)        (0.57)       (0.58)
     From Net Realized Gains
     on Investment Transactions..................           --           --           --        (0.12)           --           --
                                                          ----         ----         ----         ----          ----         ----
     Total Distributions.........................        (0.27)       (0.56)       (0.56)       (0.68)        (0.57)       (0.58)
                                                         -----        -----        -----        -----         -----        ----- 
Net Asset Value, End of Period...................        $9.46        $9.27        $9.11        $9.06         $9.66        $9.12
                                                         =====        =====        =====        =====         =====        =====
     Total Return (2)............................         5.04%        8.02%        7.09%        0.87%        12.61%       10.11%

RATIOS/SUPPLEMENTAL DATA
     Ratio of Operating Expenses
     to Average Net Assets ......................    0.50% (3)        0.51%        0.51%        0.51%         0.55%        0.56%
     Ratio of Net Investment Income
     to Average Net Assets.......................    5.86% (3)        5.99%        6.30%        6.02%         6.14%        6.54%
     Portfolio Turnover Rate.....................          19%          36%          40%          43%           27%          33%
     Net Assets, End
     of Period (in thousands)....................     $168,913     $144,675     $116,166     $116,000      $114,564      $79,949

(1)  Six months ended February 28,1997 (unaudited).

(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
</TABLE>


Semiannual Report                                      Financial Highlights   47
<TABLE>
<CAPTION>


                              FINANCIAL HIGHLIGHTS
                           CALIFORNIA INSURED TAX-FREE

For a Share Outstanding Throughout the Years Ended August 31 (except as noted)


                                                         1997(1)       1996         1995         1994         1993          1992

PER-SHARE DATA
Net Asset Value,
<S>                                                     <C>          <C>           <C>         <C>            <C>          <C>  
Beginning of Period..............................       $10.00       $9.89         $9.67       $10.64         $9.97        $9.47
                                                        ------       -----         -----       ------         -----        -----
Income from Investment Operations
     Net Investment Income ......................         0.27         0.53         0.53         0.53          0.55         0.57
     Net Realized and Unrealized Gain (Loss)
     on Investment Transactions..................         0.22         0.11         0.22       (0.69)          0.76         0.50
                                                          ----         ----         ----       -----           ----         ----
     Total From
     Investment Operations.......................         0.49         0.64         0.75       (0.16)          1.31         1.07
                                                          ----         ----         ----       -----           ----         ----
Distributions
     From Net Investment Income..................       (0.27)       (0.53)       (0.53)       (0.53)        (0.55)       (0.57)
     From Net Realized Gains
     on Investment Transactions..................           --           --           --       (0.21)        (0.09)           --
     In Excess of Net Realized Gains.............           --           --           --       (0.07)            --           --
                                                          ----         ----         ----       -----           ----         ----
     Total Distributions.........................       (0.27)       (0.53)       (0.53)       (0.81)        (0.64)       (0.57)
                                                        -----        -----        -----        -----         -----        ----- 
Net Asset Value, End of Period...................       $10.22       $10.00        $9.89        $9.67        $10.64        $9.97
                                                        ======       ======        =====        =====        ======        =====
     Total Return (2)............................        4.89%        6.60%        8.09%      (1.68)%        13.74%       11.67%

RATIOS/SUPPLEMENTAL DATA
     Ratio of Operating Expenses
     to Average Net Assets.......................     0.48%(3)        0.49%        0.50%        0.49%         0.52%        0.55%
     Ratio of Net Investment Income
     to Average Net Assets.......................     5.27%(3)        5.30%        5.54%        5.20%         5.37%        5.90%
     Portfolio Turnover Rate.....................          17%          43%          40%          47%           61%          54%
     Net Assets, End.............................
     of Period (in thousands)....................     $189,931     $191,811     $178,913     $189,439      $223,440     $145,965

(1)  Six months ended February 28,1997 (unaudited).

(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
</TABLE>


48    Financial Highlights                          American Century Investments


                                     NOTES

Semiannual Report                                                     Notes   49


                                     NOTES

50   Notes                                          American Century Investments


                                     NOTES

Semiannual Report                                                     Notes   51


                             BACKGROUND INFORMATION

Investment Objectives and Philosophy

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

   California  Tax-Free Money Market Fund and California  Municipal Money Market
Fund seek to obtain as high a level of interest  income  exempt from federal and
California income taxes as is consistent with prudent investment  management and
conservation  of  shareholders'  capital.  There can be no assurance  that these
funds will be able to maintain a stable net asset value per share.

   California High-Yield Municipal Fund is a variable-price bond fund that seeks
to provide as high a level of interest income exempt from federal and California
income  taxes  as is  consistent  with its  investment  policies,  which  permit
investment in lower-rated and unrated municipal securities.

   California Insured Tax-Free Fund is a variable-price  bond fund that seeks to
provide as high a level of current  income  exempt from  federal and  California
income taxes as is  consistent  with safety of principal  through  investment in
insured California municipal securities.

Comparative Indices

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

   The Lehman Brothers  Long-Term  Municipal Bond Index is composed of more than
2,700 municipal bonds with maturities  greater than 22 years. The average credit
rating of the  securities in the index is AA2/AA3.  The average  maturity of the
index is approximately 27 years.

Lipper Rankings

Lipper Analytical  Services,  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 California Tax-Free and Municipal funds are:

   California Tax-Exempt Money Market Funds (Tax-Free Money Market and Municipal
Money   Market)--funds   that  invest  in  high-quality   California   municipal
obligations with dollar-weighted average maturities of less than 90 days.

   California Municipal Debt Funds (High-Yield  Municipal)--funds that invest at
least 65% of assets in securities that are exempt from taxation in California.

   California Insured Municipal Debt Funds (Insured Tax-Free)--funds that invest
at least 65% of assets in securities that are exempt from taxation in California
and insured as to timely payment of interest and repayment of principal.


PORTFOLIO MANAGEMENT TEAM

Vice President and
Senior Portfolio Manager                Dave MacEwen

Senior Portfolio Manager and
Manager of Municipal Credit Analysis    Steven Permut

Senior Municipal Portfolio Manager      Colleen Denzler

Municipal Portfolio Manager             Todd Pardula

Credit Analysts                         Scott Lord, Bill McClintock,
                                        David Moore, Tim Benham


52    Background Information                        American Century Investments


                                    GLOSSARY

Returns

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

o    Average Annual  Returns  illustrate  the annually  compounded  returns that
     would have  produced  the  fund's  cumulative  total  returns if the fund's
     performance  had been  constant  over the  entire  period.  Average  annual
     returns smooth out variations in a fund's return;  they are not the same as
     fiscal year-by-year results. For fiscal year-by-year returns,  please refer
     to the "Financial Highlights" on pages 45, 46, 47 and 48.

Yields

o    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.

o    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.

o    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.

o    Tax-Equivalent  Yields show the taxable yields that investors in a combined
     California  and federal  income tax bracket would have to earn before taxes
     to equal the fund's tax-free yield.

Investment Terms

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

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

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

Statistical Terminology

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

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

o    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.

o    Expense  Ratio--the   operating  expenses  of  the  fund,  expressed  as  a
     percentage of net assets.

Types of Municipal Securities

o    AMT  Paper--instruments  with  income  subject to the  federal  alternative
     minimum tax.

o    Commercial Paper (CP)--high-grade short-term securities backed by a line of
     credit from a bank.

o    COPs (Certificates of  Participation)/Leases--securities  issued to finance
     public property  improvements  (such as city halls and police stations) and
     equipment purchases. Certificates of participation represent long-term debt
     obligations,  but leases have a higher risk  profile  because  they require
     annual appropriation.

o    GO Bonds--general  obligation  securities backed by the taxing power of the
     issuer.

o    Land-Secured  Bonds--securities such as Mello-Roos bonds and 1915 Act bonds
     that are issued to finance real estate development projects.

o    Municipal Notes--securities with maturities of two years or less.

o    Prerefunded  /ETM  Bonds--securities  refinanced or escrowed to maturity by
     the issuer because of their premium  coupons  (higher-than-market  interest
     rates).  These bonds tend to have higher  credit  ratings  because they are
     backed by Treasury securities.

o    Revenue  Bonds--securities  backed by  revenues  from sales taxes or from a
     specific project, system or facility (such as a hospital,  electric utility
     or water system).

o    Tax-Allocation   Bonds--securities   issued  to  finance   improvements  in
     redevelopment areas (such as urban neighborhoods).

o    VRDNs--variable  rate demand  notes that track  market  interest  rates and
     stabilize  their market values using  periodic  (daily or weekly)  interest
     rate adjustments.


Semiannual Report                                                  Glossary   53



[american century logo]
American
Century(sm)

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

Person-to-Person Assistance:
1-800-345-2021 or 816-531-5575

Automated Information Line:
1-800-345-8765

Telecommunications Device for the Deaf:
1-800-634-4113 or 816-753-1865

Fax: 816-340-7962

Internet: www.americancentury.com

American Century California Tax-Free & Municipal Funds

Investment Manager
Benham Management Corporation


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

American Century Investment Services, Inc.


9704           [recycled logo]
SH-BKT-8347       Recycled
<PAGE>
                                  [BOOK TWO]


                               SEMIANNUAL REPORT

                            [american century logo]
                                    American
                                  Century(sm)

                                February 28, 1997

                                     BENHAM
                                      GROUP

                        California Limited-Term Tax-Free
                      California Intermediate-Term Tax-Free
                          California Long-Term Tax-Free


                                 [front cover]


                               TABLE OF CONTENTS

Report Highlights.............................................  1
Our Message to You............................................  2
Period Overview...............................................  3
Municipal Credit Review.......................................  4
California Limited-Term Tax-Free
Performance & Portfolio Information...........................  5
Management Q & A..............................................  6
Schedule of Investments.......................................  9
Financial Highlights..........................................  36
California Intermediate-Term Tax-Free
Performance & Portfolio Information...........................  12
Management Q & A..............................................  13
Schedule of Investments.......................................  16
Financial Highlights..........................................  37


California Long-Term Tax-Free
Performance & Portfolio Information...........................  22
Management Q & A..............................................  23
Schedule of Investments.......................................  26
Financial Highlights..........................................  38
Statements of Assets and Liabilities..........................  30
Statements of Operations......................................  31
Statements of Changes in Net Assets...........................  32
Notes to Financial Statements.................................  33
Background Information
Investment Philosophy & Policies..............................  40
Comparative Indices...........................................  40
Lipper Rankings...............................................  40
Portfolio Management Team.....................................  40
Glossary......................................................  41

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

                 American Century Investments--Family of Funds

    BENHAM GROUP            AMERICAN CENTURY GROUP       TWENTIETH CENTURY GROUP

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

California Limited-Term
       Tax-Free
California Intermediate-Term
       Tax Free
California Long-Term
       Tax Free


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

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

                                                    American Century Investments


                               REPORT HIGHLIGHTS

Period Overview

o    The U.S.  economy  expanded at a healthy pace during the  six-month  period
     ended February 28, 1997, but inflation remained largely subdued.

o    Municipal  securities  performed  favorably  during the period despite some
     interim volatility caused by shifting expectations of a short-term interest
     rate hike by the Federal Reserve.

o    Shorter-maturity  municipals--more  sensitive  to  shifting  interest  rate
     policy expectations--underperformed longer-maturity securities.

o    Historically  low  issuance  of new  municipals  during  much of the period
     helped dampen market gyrations, keeping prices relatively stable. 

Municipal Credit Review

o    California's strong economic growth led several ratings agencies to upgrade
     the state's credit rating.

o    Specific  challenges,  such as Proposition  218 and federal welfare reform,
     could affect ratings of locally issued municipal bonds.

o    Continuing  economic  strength  should lead to further  upgrades during the
     coming year.

California Limited-Term

o    The fund outperformed its peer group average but lagged its benchmark index
     for the six months ended February 28, 1997.

o    We changed the fund's portfolio to a "barbell"  structure to take advantage
     of the steep yield curve among short-term California municipal bonds.

o    Going  forward,  we will likely  shorten the fund's  average  maturity  and
     duration as a seasonal supply increase puts downward  pressure on municipal
     prices,  but  we'll be  looking  to  extend  back out  later  this  summer.

California Intermediate-Term

o    The fund slightly  underperformed  its peer group average and its benchmark
     index for the six months ended February 28, 1997.

o    Due to the  market's  gyrations  during  the  period,  we kept  the  fund's
     duration  conservatively  positioned  at 5.4 years--a  neutral  position in
     comparison with the fund's peers. 

California Long-Term

o    The fund outperformed its peer group average but lagged its benchmark index
     for the six months ended February 28, 1997.

o    Due  to  the  market's  gyrations,   we  kept  the  fund's  duration  in  a
     conservative  range around 8 years during the period--a neutral position in
     comparison with the fund's peers.

o    For now,  we'll  keep the fund  conservatively  positioned  and look to add
     value to its returns by purchasing  attractively  valued municipals that we
     believe have the chance to appreciate.

                            California Limited-Term

                         Total Returns:      AS OF 2/28/97
                           6 Months                 2.82%*
                           1 Year                    3.90%

                         Net Assets:        $109.6 million
                           (AS of 2/28/97)

                         Inception Date:            6/1/92

                         Ticker Symbol:              BCSTX


                             California Inter.-Term

                         Total Returns:      AS OF 2/28/97
                           6 Months                 3.81%*
                           1 Year                    4.21%

                         Net Assets:        $436.8 million
                           (AS of 2/28/97)

                         Inception Date:           11/9/83

                         Ticker Symbol:              BCITX


                              California Long-Term

                         Total Returns:      AS OF 2/28/97
                           6 Months                 5.19%*
                           1 Year                    5.01%

                         Net Assets:        $301.1 million
                           (AS of 2/28/97)

                         Inception Date:           11/9/83

                         Ticker Symbol:              BCLTX

                         * Not annualized.

Many of the investment  terms in this report are defined in the Glossary on page
41.


Semiannual Report                                         Report Highlights    1


                               OUR MESSAGE TO YOU

[photo of James E. Stowers III and James M. Benham]

The six months ended February 28, 1997,  were  eventful,  both for the municipal
bond market and our company.  Municipal bonds performed favorably overall during
the period,  despite some volatility in January as U.S. economic growth appeared
to accelerate.  In the following pages, our investment  management team provides
further details about the municipal  market and how your fund was managed during
the period.

Changing market conditions underscore the importance of quality investments. Our
commitment to  high-quality  securities is  exemplified  by the expansion of our
municipal credit research team. The five members of the team perform an in-depth
analysis on all securities considered for purchase by American Century municipal
money market and bond funds. The team has established a credit management system
that defines investment limits to cap our funds' exposure to individual issuers,
market sectors and geographical regions. The team plays an important role in the
management of the California Tax-Free and Municipal funds.

On the corporate  front, we completed the  operational  integration of Twentieth
Century and The Benham Group in September 1996. As a result, you now have direct
access to a broader spectrum of funds and services.

We also changed the name of our company.  On January 1, 1997,  we began  serving
you under the name American  Century  Investments,  which  reflects our expanded
identity and the independent  thinking  common to Twentieth  Century and Benham.
American  Century's fund family is divided into three groups--the  Benham Group,
the American  Century  Group and the Twentieth  Century  Group.  The  California
Tax-Free  and  Municipal  funds will remain in the Benham  Group  because  their
investment goal--current tax-free income--matches a key attribute of that group.

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

These  are  examples  of how we  continue  to work to  provide  information  and
services that are useful and convenient to investors in our funds. Thank you for
investing with us.

Sincerely,

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


2    Our Message to You                             American Century Investments


                                PERIOD OVERVIEW

U.S. Economy

The U.S.  economy  expanded at a healthy clip during the six-month  period ended
February 28, 1997.  Fueling growth was low unemployment,  high employment growth
and a robust housing market that defied expectations of a slowdown. As a result,
the economy  expanded at a 2.1% annual rate during the third quarter of 1996 and
a 3.8%  annual rate during the fourth  quarter.  The  strength of the economy in
1997 has continued to surprise  analysts,  many of whom are predicting  that the
U.S. economy will grow by more than 3% during the first quarter.

While the economy  continued  its  impressive  growth rate,  inflation  remained
relatively  subdued.  Overall consumer  prices--as  measured by the government's
consumer  price  index--rose  at a modest 3.1% annual rate during the six months
ended February 28, 1997. This unusual combination of healthy economic growth and
low inflation sent mixed signals to U.S. bond investors.

California Municipal Bond Market

Municipal bond investors  enjoyed  favorable  returns for the six-month  period.
Nevertheless,  shifting expectations of an interest-rate increase by the Federal
Reserve (the Fed) kept investors  guessing about the possible  direction of bond
prices.

As demonstrated by the accompanying graph,  municipal yields peaked at the start
of the period amid strong  expectations  for higher  interest rates. In general,
investors were  concerned that the U.S.  economy was ready to overheat and spark
inflation.  However,  inflation  remained  subdued,  and  signs of a  moderating
economy  convinced  many that a Fed rate hike was unlikely,  allowing  municipal
bonds to rally.  By early  December,  prices  crested  with the yield on 30-year
municipal  bonds at 5.29%,  nearly  half a percent  lower than the 5.78% seen in
early September.

However,  aided by strong consumer spending activity,  the economy  strengthened
again in early  1997.  With  growing  expectations  that the  strains  of robust
economic  growth  would  finally  force  the Fed to stage a  pre-emptive  strike
against  inflation,  investors  pushed  municipal  prices  lower.  By the end of
February, the yield on 30-year municipal bonds had risen to 5.44%.

Helping to support  municipal  prices during the volatile period were low levels
of new municipal issuance,  which only in recent months has reached historically
normal levels. An upsurge of demand from retail investors also buoyed short- and
intermediate-maturity  municipals during much of the period, but that beneficial
effect was largely  countered by shifting  expectations  for higher rates.  More
sensitive   to   anticipated   Fed   activities,   shorter-maturity   municipals
underperformed  their  longer-maturity  counterparts for the period.  Meanwhile,
strong demand from insurance  companies  helped buoy long-term  municipal prices
late in 1996 as many of these  companies  made  "crossover"  buys--that is, they
purchased municipal bonds instead of  comparable-maturity  Treasury bonds due to
the relatively attractive yield offered by municipals.

[line graph - data below]

Shifting Municipal Yield Curve

Years    9/5/96   12/3/96  2/28/97
0.25     3.51%    3.03%    3.22%
0.5      3.71     3.23     3.42
1        3.91     3.43     3.65
2        4.16     3.73     3.92
3        4.36     3.93     4.1
4        4.51     4.05     4.24
5        4.61     4.15     4.34
6        4.71     4.25     4.44
7        4.81     4.35     4.54
8        4.91     4.45     4.64
9        5.01     4.55     4.74
10       5.11     4.65     4.84
11       5.198    4.738    4.916
12       5.286    4.826    4.992
13       5.374    4.914    5.068
14       5.462    5.002    5.144
15       5.55     5.09     5.22
16       5.584    5.118    5.252
17       5.618    5.146    5.284
18       5.652    5.174    5.316
19       5.686    5.202    5.348
20       5.72     5.23     5.38
21       5.728    5.238    5.388
22       5.736    5.246    5.396
23       5.744    5.254    5.404
24       5.752    5.262    5.412
25       5.76     5.27     5.42
26       5.764    5.274    5.424
27       5.768    5.278    5.428
28       5.772    5.282    5.432
29       5.776    5.286    5.436
30       5.78     5.29     5.44

Source: Bloomberg Financial Markets


Semiannual Report                                           Period Overview    3


                            MUNICIPAL CREDIT REVIEW

As we  anticipated  early in 1996, the state of  California's  credit rating was
upgraded by several rating agencies within the last year. The key to the state's
improving  credit quality has been its ability to generate  strong job growth in
various sectors of the economy.  The six months ended February 28, 1997,  showed
an  acceleration of the economic growth that California has enjoyed for the past
three years.  With income gains and  employment  growth  exceeding  the national
average,  California's  unemployment  rate fell to 6.5% for the first time since
1990 (see the  accompanying  graph).  The state has more than  recovered all the
jobs  lost  in  the  last  recession,  largely  due  to  strong  growth  in  the
high-technology industries.

California is also the nation's leading  exporter,  with exports nearly equaling
those of the other 49 states combined. Its gross product is projected to surpass
$1 trillion in 1997,  a milestone  that the U.S. as a whole  passed less than 30
years ago.

The state's  finances  continue to improve--its  revenue is projected to be more
than $700 million  over budget for the  1996-1997  fiscal year,  and the general
fund is expected to show a reserve for the first time in a number of years.

The state's  strongest  growth has been  centered in the San Francisco Bay Area,
led by Santa  Clara  County,  the hub of the  state's  thriving  high-technology
industry.  Southern  California's economy also continued to expand,  though at a
slower pace.

There has also been statewide  improvement  in the real estate  sector.  The San
Francisco Bay Area has seen property values rise appreciably, while the Southern
California  real estate market has bottomed out and begun to trend upward.  Real
estate prices in some regions have surpassed their 1989 highs,  underscoring the
regional vitality of California's real estate market.

In spite of the state's rosy economic outlook,  specific  challenges continue to
affect the credit  picture for locally  issued  municipal  bonds.  For  example,
California's Proposition 218 requires voter approval for the levying of fees and
other  charges by local  governments.  This could have a negative  impact on the
credit quality of securities  issued by local  governments  within the state. In
addition,  federal  welfare  reform could place  additional  credit  pressure on
already-burdened  county  budgets.  This  possibility has led us to position our
California municipal funds with very low exposure to county debt.

With these  issues in mind,  we have  continued to expand our  municipal  credit
research  team.  The five members of the team keep a close watch on economic and
legislative  trends  within  the state and  thoroughly  research  all  municipal
securities  considered  for  purchase  by the  Benham  California  Tax-Free  and
Municipal funds.

We will continue to monitor legislative developments on welfare reform and state
budgetary  issues in the months  ahead.  Overall,  our  outlook  for the state's
credit  rating  remains  very  positive,  and we feel that  continuing  economic
strength will lead to further credit upgrades within the next 12 months.

[line graph - data below]

         California Unemployment

1/31/90         5.0%
2/28/90          5.1
3/31/90          5.2
4/30/90          5.4
5/31/90          5.4
6/30/90          5.5
7/31/90          5.6
8/31/90          5.8
9/30/90          6.1
10/31/90         6.4
11/30/90         6.8
12/31/90         6.9
1/31/91          7.0
2/28/91          7.4
3/31/91          7.7
4/30/91          7.8
5/31/91          7.7
6/30/91          7.7
7/31/91          7.8
8/31/91          7.7
9/30/91          7.8
10/31/91         7.9
11/30/91         8.0
12/31/91         8.2
1/31/92          8.4
2/29/92          9.0
3/31/92          8.9
4/30/92          9.0
5/31/92          9.1
6/30/92          9.3
7/31/92          9.4
8/31/92          9.6
9/30/92          9.7
10/31/92         9.7
11/30/92         9.7
12/31/92         9.7
1/31/93          9.7
2/28/93          9.6
3/31/93          9.5
4/30/93          9.3
5/31/93          9.4
6/30/93          9.4
7/31/93          9.3
8/31/93          9.3
9/30/93          9.3
10/31/93         9.3
11/30/93         9.3
12/31/93         9.2
1/31/94          9.2
2/28/94          9.3
3/31/94          9.0
4/30/94          8.8
5/31/94          8.9
6/30/94          8.7
7/31/94          8.6
8/31/94          8.5
9/30/94          8.3
10/31/94         8.1
11/30/94         7.9
12/31/94         7.8
1/31/95          8.1
2/28/95          7.8
3/31/95          7.8
4/30/95          7.9
5/31/95          7.9
6/30/95          7.8
7/31/95          7.8
8/31/95          7.8
9/30/95          7.8
10/31/95         7.8
11/30/95         7.9
12/31/95         7.8
1/31/96          7.6
2/29/96          7.6
3/31/96          7.5
4/30/96          7.4
5/31/96          7.3
6/30/96          7.2
7/31/96          7.1
8/31/96          7.1
9/30/96          7.1
10/31/96         7.0
11/30/96         6.9
12/31/96         6.8
1/31/97          6.9
2/28/97          6.5

Source: DRI/McGraw Hill


4    Municipal Credit Review                        American Century Investments

<TABLE>
<CAPTION>

                        CALIFORNIA LIMITED-TERM TAX-FREE


                                                 30-Day              30-Day Tax-Equivalent Yields
                                                    SEC        34.70%       37.42%         41.95%            45.22%
                                                  Yield   Tax Bracket  Tax Bracket    Tax Bracket       Tax Bracket
                                                  -----   -----------  -----------    -----------       -----------

CURRENT YIELD (as of February 28, 1997)
<S>                                               <C>           <C>          <C>            <C>               <C>  
California Limited-Term Tax-Free ...............  3.61%         5.53%        5.77%          6.22%             6.59%

Yields are defined in the Glossary on page 41.
</TABLE>

<TABLE>

                                                                                  AVERAGE ANNUAL RETURNS
                                                             6 MONTHS       1 YEAR        3 YEARS      LIFE OF FUND
TOTAL RETURNS (as of February 28, 1997)
<S>                                                             <C>          <C>            <C>               <C>  
California Limited-Term Tax-Free                                2.82%        3.90%          4.22%             4.70%
Lehman 3-Year Municipal Bond Index                              3.25%        4.56%          4.98%          5.20%(1)
Average California Short-Intermediate Municipal Debt Fund(2)    2.75%        3.60%          4.25%          4.96%(1)
Fund's Ranking Among California
Short-Intermediate Municipal Debt Funds(2)                         --  5 out of 11     5 out of 7        2 out of 2

(1)  Returns  since  6/30/92,  the date nearest the fund's  inception  for which
     return data are available. Inception date was June 1, 1992.

(2)  According to Lipper Analytical Services.
</TABLE>

See pages 40-41 for more information  about returns,  the comparative  index and
Lipper fund rankings.

[line graph - data below]

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

Value on 2/28/87

$10,000 investment made 6/1/92

            Limited-Term Tax-Free      Lehman 3-Year Municipal Index

5/31/92           $10,000                        $10,000
6/30/92           $10,074                        $10,122
7/31/92           $10,249                        $10,319
8/31/92           $10,222                        $10,273
9/30/92           $10,277                        $10,357
10/31/92          $10,251                        $10,317
11/30/92          $10,347                        $10,389
12/31/92          $10,413                        $10,451
1/31/93           $10,497                        $10,530
2/28/93           $10,673                        $10,695
3/31/93           $10,616                        $10,663
4/30/93           $10,679                        $10,725
5/31/93           $10,699                        $10,754
6/30/93           $10,754                        $10,823
7/30/93           $10,733                        $10,838
8/31/93           $10,850                        $10,897
9/30/93           $10,913                        $10,945
10/31/93          $10,923                        $10,967
11/30/93          $10,925                        $10,953
12/31/93          $11,029                        $11,068
1/31/94           $11,095                        $11,158
2/28/94           $10,986                        $11,054
3/31/94           $10,881                        $10,920
4/29/94           $10,903                        $10,984
5/31/94           $10,929                        $11,036
6/30/94           $10,942                        $11,039
7/29/94           $11,029                        $11,131
8/31/94           $11,057                        $11,171
9/30/94           $11,037                        $11,143
10/31/94          $11,008                        $11,116
11/30/94          $10,946                        $11,096
12/30/94          $10,962                        $11,144
1/31/95           $11,059                        $11,237
2/28/95           $11,206                        $11,356
3/31/95           $11,290                        $11,458
4/28/95           $11,337                        $11,497
5/31/95           $11,468                        $11,673
6/30/95           $11,518                        $11,701
7/31/95           $11,581                        $11,825
8/31/95           $11,646                        $11,917
9/30/95           $11,683                        $11,950
10/31/95          $11,749                        $12,008
11/30/95          $11,835                        $12,085
12/31/95          $11,874                        $12,135
1/31/96           $11,977                        $12,230
2/29/96           $11,970                        $12,233
3/31/96           $11,904                        $12,203
4/30/96           $11,925                        $12,218
5/31/96           $11,945                        $12,229
6/30/96           $11,995                        $12,301
7/31/96           $12,077                        $12,370
8/31/96           $12,096                        $12,388
9/30/96           $12,162                        $12,464
10/31/96          $12,242                        $12,551
11/30/96          $12,332                        $12,669
12/31/96          $12,339                        $12,676
1/31/97           $12,371                        $12,731
2/28/97           $12,438                        $12,825

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

PORTFOLIO AT A GLANCE
                                 2/28/97          8/31/96
Number of Securities               64               55
Weighted Average Maturity       3.2 years        3.0 years
Average Duration                2.7 years        2.6 years
Expense Ratio                    0.49%*            0.49%

* Annualized.


Semiannual Report                          California Limited-Term Tax-Free    5


                        CALIFORNIA LIMITED-TERM TAX-FREE

Management Q & A

An interview with Joel Silva, a portfolio manager on the California Tax-Free and
Municipal funds management team.

How did the fund perform?

The fund outperformed its peer group average but lagged its benchmark index. For
the six months ended  February  28, 1997,  the fund had a total return of 2.82%,
compared  with the 3.25% return of the Lehman  Brothers  3-Year  Municipal  Bond
Index and the 2.75%  average  return  of the 11  "California  Short-Intermediate
Municipal  Debt Funds"  tracked by Lipper  Analytical  Services.  (See the Total
Returns table on the previous page for other fund performance comparisons.)

How was the fund positioned during the past six months?

Although we made slight  adjustments as market conditions  shifted,  we kept the
fund's  average  maturity  and  duration  in a fairly  narrow  range  during the
six-month  period.  We focused on other tools, such as credit research and yield
curve positioning, to enhance the fund's return.

For example,  we structured the fund's  portfolio to take advantage of the steep
yield curve environment.  During the six-month period, the municipal yield curve
was very steep  between one and five  years--that  is, the gap between  one-year
municipal yields and five-year municipal yields was wider than normal.

[bar graph - data below]

CALIFORNIA LIMITED-TERM TAX-FREE FISCAL YEAR-BY-YEAR RETURNS (Periods ended
August 31)

            Limited-Term Tax-Free      Lehman 3-Year Municipal Index

1992*               1.47%                          2.73%
1993                6.15%                          6.38%
1994                1.90%                          2.51%
1995                5.33%                          6.68%
1996                3.87%                          3.95%

This chart  illustrates  the  historical  year-by-year  volatility of the fund's
returns  since its inception  and compares  them with the index's  returns.  The
fund's total returns include operating  expenses,  while the index's do not. See
page 40 for a definition of the index.

* Return from the fund's 6/1/92 inception date to 8/31/92.


6    California Limited-Term Tax-Free               American Century Investments


                        CALIFORNIA LIMITED-TERM TAX-FREE

As a result,  we expanded the fund's  holdings of securities  with maturities of
5-8 years.  We balanced this  position with one-year  securities to maintain the
fund's three-year average maturity.  This structure--known as a "barbell"--tends
to perform  best when the yield  curve  moves from steep to flat.  The  one-year
securities  also  provided  some price gains as they became  eligible  for money
market funds.

Can you elaborate on these money market-eligible securities?

Money market funds can only buy securities with maturities of 13 months or less.
When securities  reach this maturity  threshold,  demand from money market funds
tends to drive their prices up. We've  attempted to capitalize on this situation
by purchasing  municipal  securities with maturities of 14-18  months--which are
also an important part of our barbell strategy--and then selling them after they
become money market-eligible.

Although the fund can now invest in the full range of investment-grade municipal
securities  (those rated BBB- or higher),  the fund  doesn't own any  securities
with a rating below A. Why?

There  hasn't been any  incentive  to purchase  lower-rated  securities.  Credit
quality spreads--the differences between the yields of high-rated securities and
those of  lower-rated  securities--among  California  municipal  securities  are
extremely  narrow.  In our view,  we're not being  rewarded  enough to invest in
lower-rated  issues,  so we've maintained a high degree of credit quality in the
fund. However, we will continue to look for lower-rated  securities that provide
a good balance between risk and return.

The fund  currently  holds about 7% of its assets in municipal  securities  from
Puerto Rico. Do these securities provide investors with tax-exempt income?

Yes.  The fund is allowed to invest as much as 20% of its assets in Puerto  Rico
municipal  securities,  which have the unique  distinction  of providing  double
tax-free  income for  investors in all 50 states.  Because of this  distinction,
there is a great deal of demand for these securities,  especially from investors
in high-tax  states such as New York. This strong demand gives Puerto Rico bonds
a yield that is typically about 5 basis points lower than comparable  California
municipal securities.

In September,  however,  there was a huge wave of new municipal  issuance in New
York that attracted many New York municipal  investors away from the Puerto Rico
municipal  market.  The  drop  in  demand  caused  Puerto  Rico  yields  to rise
significantly.  At the same time, a lack of new supply was depressing  municipal
yields in California.  As a result, we were able to buy some insured,  AAA-rated
Puerto Rico municipal  securities with maturities of 8-10 years while picking up
7 basis points in yield over comparable California securities.

[pie charts - data below]

PORTFOLIO   COMPOSITION   BY  SECURITY   TYPE  (as  of   2/28/97)   
Revenue  50%
Prerefunded/ETM 15% 
COPs/Leases 15% 
GO 13% 
Land-Secured 4% 
Other 3%

PORTFOLIO   COMPOSITION   BY  SECURITY   TYPE  (as  of   8/31/96)   
Revenue  46%
Prerefunded/ETM 21% 
GO 14% 
COPs/Leases 12% 
Land-Secured 4% 
Other 3%


Semiannual Report                          California Limited-Term Tax-Free    7


                        CALIFORNIA LIMITED-TERM TAX-FREE

How have these securities performed?

Very well. Over the last six months,  the situation has reversed--a  shortage of
new supply has caused many New York municipal investors to show renewed interest
in Puerto Rico bonds,  and yields  have  fallen back to normal  levels.  Falling
yields  have  translated  into price  appreciation  for the fund's  Puerto  Rico
securities.

Why haven't you sold the fund's Puerto Rico bonds?

We're still waiting for the right opportunity. We'd like to gradually sell these
bonds so that fund  shareholders  won't realize the taxable capital gains all at
once.  We're also  holding off until we can find some  attractive  opportunities
among California securities.  Low supply is still restraining California yields,
but we expect that to change in the second quarter of this year.

What is your  outlook  for the  California  municipal  market  over the next six
months?

As in the past, the general outlook for interest rates is uncertain. The economy
continues to show solid growth,  but inflation has remained  relatively low. The
question is, are these conditions sustainable?  The Federal Reserve doesn't seem
to think so--in March, it made a pre-emptive strike against inflation by raising
short-term  interest rates. Many Fed watchers suspect this may be the first in a
series of rate hikes.

Despite  these  concerns,  we think the  municipal  market has a more  favorable
outlook. The usual seasonal increase in supply as we approach summer should lead
to higher yields and lower prices,  but we view this  short-term dip as a buying
opportunity.  Long-term  municipal yields are currently around 5.80%;  when they
hit 6.00%,  demand  from retail  buyers--individuals,  insurance  companies  and
mutual  funds--tends  to  increase.  Stronger  demand  would  be good  news  for
municipal bond prices.

With this  outlook  in mind,  what are your plans for the fund over the next six
months?

With  uncertainty  about future Fed rate  increases  and the  anticipated  price
declines from increasing supply in the municipal market, we will likely position
the fund a little more conservatively in the coming months. We'll likely shorten
the fund's  average  maturity  and  duration  slightly.  We'll also look to sell
securities  with par  coupons--bonds  trading  at face  value,  which  appeal to
individual  investors--and  buy premium bonds, which typically suffer less price
depreciation  in a rising  interest  rate  environment.  However,  we think that
market  conditions  will improve  later this year,  so we'll also be looking for
opportunities  to extend the fund's  average  maturity  and  duration  back out,
especially if we see long-term municipal yields approach 6%.

[pie charts - data below]

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 2/28/97)
AAA 58%
AA 22%
A 20%

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 8/31/96)
AAA 65%
AA 14%
A 21%


8    California Limited-Term Tax-Free               American Century Investments


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA LIMITED-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

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

MUNICIPAL SECURITIES
$ 1,000,000   Alameda County Transit Authority
              Sales Tax Rev., 4.50%, 11-1-01
              (AMBAC)                                              $1,008,120
  3,500,000   Anaheim Redevelopment Agency
              Local Government Financing Joint
              Power Auth. Rev., Series A, 7.95%,
              9-1-98, Prerefunded at
              102% of Par (MBIA)(1)                                 3,786,440
  1,695,000   Burbank Redevelopment Agency
              West Olive Tax Allocation, Series
              1994, 6.00%, 12-1-97 (AMBAC)                          1,725,612
  1,145,000   California Educational Facility Auth.
              Rev., (Pepperdine University),
              5.125%, 1-15-02 (AMBAC)                               1,183,335
  1,080,000   California Educational Facility Auth.
              Rev., Series A, (Pooled College &
              University Project), 4.95%,
              12-1-02                                               1,096,675
  1,710,000   California Educational Facility Auth.
              Rev., (University of Southern
              California), 5.60%, 10-1-01                           1,778,913
  1,140,000   California Educational Facility Auth.
              Rev., Series A, (University Project),
              4.55%, 12-1-99                                        1,150,226
  1,745,000   California Health Facility Financing
              Auth. Rev. Certificates of
              Participation, (St. Joseph Hospital),
              5.50%, 7-1-97                                         1,755,452
  1,400,000   California Health Facility Financing
              Auth. Rev., Series 1993 A,
              (St. Francis Memorial Hospital),
              5.00%, 11-1-98                                        1,417,178
  1,750,000   California Health Facility Financing
              Auth. Rev., Series 1993 A,
              (St. Francis Memorial Hospital),
              5.50%, 11-1-01                                        1,800,487
  1,600,000   California Public Works Board
              Lease Rev., Series A,
              (Department of Justice Building),
              5.50%, 5-1-00                                         1,652,960
  3,175,000   City of Whittier Health Rev.,
              (Presbyterian Intercommunity
              Hospital), 5.50%, 6-1-02 (MBIA)                       3,328,035
  1,000,000   Encinitas Unified School District
              Certificates of Participation,
              5.00%, 9-1-01                                         1,019,380


Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 1,700,000   Imperial Irrigation District
              Certificates of Participation,
              5.625%, 5-1-97                                       $1,705,933
  1,000,000   Imperial Irrigation District
              Certificates of Participation,
              Series 1993, 6.70%, 11-1-98                           1,046,480
  1,500,000   Industry Urban Development
              Agency Tax Allocation, 4.70%,
              5-1-04 (MBIA)                                         1,500,630
  1,140,000   Kern High School District GO,
              Series A, 6.00%, 2-1-04 (MBIA)                        1,231,234
  2,000,000   Los Angeles Airport Rev., Series
              1989 A, 7.00%, 5-1-97,
              Prerefunded at 102% of Par(1)                         2,051,960
  1,500,000   Los Angeles Building Auth. Lease
              Redevelopment Rev., 4.80%,
              5-1-02                                                1,518,405
  1,000,000   Los Angeles Building Auth. Lease
              Redevelopment Rev., 4.90%,
              5-1-03                                                1,013,760
  1,000,000   Los Angeles County Metropolitan
              Transit Auth. Sales Tax Rev.,
              (Proposition C), 5.90%, 7-1-02
              (AMBAC)                                               1,072,610
  1,800,000   Los Angeles Convention and
              Exhibition Center Certificates of
              Participation, 6.60%, 8-15-99
              (AMBAC)                                               1,907,478
  1,000,000   Los Angeles Convention and
              Exhibition Center Certificates of
              Participation, Series A, 7.30%,
              8-15-99, Prerefunded at
              101.5% of Par(1)                                      1,092,880
  2,360,000   Los Angeles County Public Works
              Financing Auth. Lease Rev.,
              Series A, 6.00%, 9-1-04 (MBIA)                        2,546,015
  1,000,000   Los Angeles County Transportation
              Sales Tax Rev., Series A, 6.30%,
              7-1-01                                                1,073,050
  1,385,000   Los Angeles Municipal
              Improvement Corporation
              Certificates of Participation,
              4.75%, 12-1-04 (AMBAC)                                1,384,903
  3,605,000   Los Angeles Municipal Improvement
              Corporation Sanitation Rev.,
              5.75%, 2-1-98 (MBIA)                                  3,673,964

See Notes to Financial Statements


Semiannual Report                          California Limited-Term Tax-Free    9


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA LIMITED-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 1,000,000   Los Angeles Rev. Certificates of
              Participation, 6.50%, 11-1-98                        $1,041,690
  2,000,000   Los Angeles Unified School District
              GO, Series B, 4.50%, 9-30-97                          2,011,440
  2,000,000   Los Angeles Waste Water
              System Rev., 6.80%, 8-1-98,
              Prerefunded at 102% of Par(1)                         2,126,240
  1,000,000   Los Angeles Waste Water System
              Rev., 6.70%, 2-1-00                                   1,061,930
  1,000,000   Metropolitan Water District of
              Southern California Waterworks
              Rev., 6.375%, 7-1-02                                  1,092,540
  2,000,000   Metropolitan Water District of
              Southern California Waterworks
              Rev., Series 1991, 6.10%,
              7-1-99                                                2,093,560
  2,000,000   Modesto, Stockton, Redding Public
              Power Agency Rev., Series 1997
              G, 5.50%, 7-1-01 (MBIA)                               2,093,600
  1,365,000   Ontario Redevelopment Financing
              Auth. Rev., (Center City Cimarron
              Project), 5.70%, 8-1-01 (MBIA)                        1,438,123
  1,500,000   Orange County Transportation
              Sales Tax Rev., 5.50%, 2-15-01
              (AMBAC)                                               1,561,050
  1,225,000   Orange County Water District
              Certificates of Participation,
              4.70%, 8-15-00                                        1,240,986
  3,200,000   Puerto Rico Commonwealth GO,
              5.50%, 7-1-01 (MBIA)                                  3,356,224
  2,000,000   Puerto Rico Commonwealth
              Highway and Transportation Auth.
              Rev., 6.00%, 7-1-01 (MBIA)                            2,136,900
  1,000,000   Puerto Rico Commonwealth
              Highway and Transportation Auth.
              Rev., 5.20%, 7-1-03 (MBIA)                            1,041,270
  1,000,000   Puerto Rico Commonwealth
              Highway and Transportation Auth.
              Rev., 6.25%, 7-1-04 (MBIA)                            1,103,380
  2,000,000   Rancho Water District Financing
              Auth. Rev., 4.70%, 9-15-01
              (LOC: Toronto Dominion)                               2,029,380
  1,000,000   Redding Joint Powers Financing
              Auth. Electrical System Rev.,
              Series A, 5.50%, 6-1-01 (MBIA)                        1,045,970

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 4,485,000   Sacramento Municipal Utility
              District Electric Rev., Series D,
              4.60%, 11-15-98                                      $4,534,111
    900,000   Sacramento Schools Auth. Rev.,
              (Workers Compensation
              Progaram C), 5.75%, 6-1-03(1)                           958,077
  2,000,000   San Bernardino County Certificates
              of Participation, Series A,
              (Medical Center Project), 5.20%,
              8-1-04 (MBIA)                                         2,064,520
  2,625,000   San Diego Regional Transportation
              Commission Sales Tax Rev.,
              Series 1994 A, 5.00%, 4-1-99
              (FGIC)                                                2,681,569
  4,000,000   San Francisco Bay Area Rapid
              Transit District Sales Tax Rev.,
              4.60%, 7-1-97 (AMBAC)                                 4,003,520
  1,085,000   San Francisco City and County GO,
              6.00%, 6-15-98 (FGIC)                                 1,116,215
  2,930,000   San Francisco Port Commission
              Rev. Refunding, 5.25%, 7-1-99                         2,997,771
  1,000,000   San Mateo Transportation Sales
              Tax Rev., Series A, 6.50%,
              6-1-98 (MBIA)                                         1,053,910
  1,085,000   Santa Barbara County Certificates
              of Participation, 4.90%, 3-1-01                       1,103,532
  1,185,000   South Coast Air Quality
              Management District Building
              Corporation Rev., 5.50%, 8-1-01
              (AMBAC)                                               1,241,465
  1,135,000   Southern California Public Power
              Agency Pooled Transmission Auth.
              Joint Power Rev., Series 1989,
              7.00%, 7-1-00, Prerefunded at
              102% of Par(1)                                        1,256,740
  1,000,000   Southern California Public Power
              Auth. Electric Rev., Series 1989,
              6.75%, 7-1-99                                         1,057,150
  1,510,000   State of California GO, 6.50%,
              11-1-97                                               1,538,962
  1,000,000   State of California GO, 6.50%,
              4-1-98 (AMBAC)                                        1,029,160
  2,325,000   State of California GO, 6.10%,
              2-1-02 (AMBAC)                                        2,497,585

See Notes to Financial Statements


10   California Limited-Term Tax-Free               American Century Investments


                            SCHEDULE OF INVESTMENTS
                        CALIFORNIA LIMITED-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 3,980,000   University of California Rev.,
              Series A, 7.00%, 9-1-97,
              Prerefunded at 102% of Par
              (MBIA)(1)                                        $    4,130,126
  1,040,000   Victor Valley Joint Union High
              School District GO, 5.60%,
              9-1-04 (MBIA)                                         1,104,377
  2,000,000   West Basin Water District
              Certificates of Participation,
              Series 1991, 6.10%, 8-1-98
              (AMBAC)(1)                                            2,069,000
                                                                  -----------

TOTAL MUNICIPAL SECURITIES-95.3%                                  108,434,188
   (Cost $107,140,674)                                            -----------

SHORT-TERM MUNICIPAL SECURITIES
  2,500,000   California Pollution Control
              Financing Auth. Rev., VRDN,
              Series 1991 C, (Shell Oil Project),
              3.35%, 3-3-97                                         2,500,000
  1,800,000   California Pollution Control
              Financing Auth. Rev., VRDN,
              Series 1996 F, (Pacific Gas &
              Electricity), 3.35%, 3-3-97
              (LOC: Banque National de Paris)                       1,800,000
  1,000,000   Irvine Ranch Water District, VRDN,
              Series 1993 A, 3.25%, 3-3-97
              (LOC: Bank of America)                                1,000,000
                                                                    ---------

TOTAL SHORT-TERM
MUNICIPAL SECURITIES--4.7%                                          5,300,000
   (Cost $5,300,000)                                                ---------

TOTAL INVESTMENT SECURITIES-100.0%                               $113,734,188
   (Cost $112,440,674)                                            ===========

Notes to Schedule of Investments 
AMBAC = AMBAC Indemnity Corp.
FGIC = Financial Guaranty Insurance Company
GO = General Obligation
LOC = Letter of Credit
MBIA = Municipal Bond Insurance Association
VRDN = Variable Rate Demand Note. Interest reset date is indicated and used in
calculating the weighted average portfolio maturity. Rate shown is effective
February 28, 1997.
(1)Escrowed in U.S. Government Securities.

See Notes to Financial Statements


Semiannual Report                          California Limited-Term Tax-Free   11

<TABLE>
<CAPTION>

                      CALIFORNIA INTERMEDIATE-TERM TAX-FREE


                                             30-Day                    30-Day Tax-Equivalent Yields
                                                SEC              34.70%            37.42%           41.95%           45.22%
                                              Yield         Tax Bracket       Tax Bracket      Tax Bracket      Tax Bracket
                                              -----         -----------       -----------      -----------      -----------

CURRENT YIELD (as of February 28, 1997)
<S>                                           <C>                 <C>               <C>              <C>              <C>  
California Intermediate-Term Tax-Free ......  4.23%               6.48%             6.76%            7.29%            7.72%

Yields are defined in the Glossary on page 41.
</TABLE>

<TABLE>

                                                                       AVERAGE ANNUAL RETURNS
                                           6 MONTHS              1 YEAR           3 YEARS          5 YEARS         10 YEARS
                                           --------              ------           -------          -------         --------
TOTAL RETURNS (as of February 28, 1997)
<S>                                           <C>                 <C>               <C>              <C>              <C>  
California Intermediate-Term Tax-Free         3.81%               4.21%             5.20%            6.41%            6.06%
Lehman 5-Year GO Index                        3.96%               4.76%             5.50%            6.23%            6.30%
Average California Intermediate
Municipal Debt Fund(1)                        3.95%               4.29%             4.97%            6.22%            6.06%
Fund's Ranking Among California
Intermediate Municipal Debt Funds(1)             --        14 out of 29       9 out of 21       3 out of 6       1 out of 1

(1)  According to Lipper Analytical Services.
</TABLE>

See pages 40-41 for more information  about returns,  the comparative  index and
Lipper fund rankings.

[line graph - data below]

GROWTH OF $10,000 OVER TEN YEARS

Value on 2/28/97

$10,000 investment made 2/28/87

                       Intermediate-Term Tax-Free        Lehman 5-Year GO Index

2/28/87                         $10,000                         $10,000
3/31/87                          $9,921                          $9,944
4/30/87                          $9,472                          $9,649
5/31/87                          $9,489                          $9,648
6/30/87                          $9,641                          $9,852
7/31/87                          $9,776                          $9,965
8/31/87                          $9,769                          $9,985
9/30/87                          $9,440                          $9,649
10/31/87                         $9,539                          $9,791
11/30/87                         $9,704                          $9,909
12/31/87                         $9,803                         $10,018
1/31/88                         $10,045                         $10,264
2/29/88                         $10,136                         $10,368
3/31/88                         $10,080                         $10,329
4/30/88                         $10,158                         $10,423
5/31/88                         $10,084                         $10,297
6/30/88                         $10,134                         $10,372
7/31/88                         $10,173                         $10,420
8/31/88                         $10,150                         $10,389
9/30/88                         $10,263                         $10,490
10/31/88                        $10,367                         $10,581
11/30/88                        $10,298                         $10,525
12/31/88                        $10,382                         $10,554
1/31/89                         $10,500                         $10,706
2/28/89                         $10,406                         $10,592
3/31/89                         $10,358                         $10,525
4/30/89                         $10,536                         $10,705
5/31/89                         $10,691                         $10,900
6/30/89                         $10,798                         $11,019
7/31/89                         $10,939                         $11,180
8/31/89                         $10,889                         $11,137
9/30/89                         $10,877                         $11,142
10/31/89                        $10,968                         $11,152
11/30/89                        $11,120                         $11,294
12/31/89                        $11,206                         $11,385
1/31/90                         $11,224                         $11,391
2/28/90                         $11,298                         $11,476
3/31/90                         $11,266                         $11,440
4/30/90                         $11,214                         $11,403
5/31/90                         $11,419                         $11,611
6/30/90                         $11,508                         $11,696
7/31/90                         $11,648                         $11,836
8/31/90                         $11,560                         $11,795
9/30/90                         $11,591                         $11,820
10/31/90                        $11,793                         $11,994
11/30/90                        $11,965                         $12,167
12/31/90                        $11,990                         $12,212
1/31/91                         $12,177                         $12,392
2/28/91                         $12,266                         $12,504
3/31/91                         $12,226                         $12,475
4/30/91                         $12,373                         $12,632
5/31/91                         $12,446                         $12,696
6/30/91                         $12,417                         $12,694
7/31/91                         $12,530                         $12,820
8/31/91                         $12,686                         $12,986
9/30/91                         $12,856                         $13,145
10/31/91                        $12,929                         $13,245
11/30/91                        $12,937                         $13,287
12/31/91                        $13,235                         $13,585
1/31/92                         $13,235                         $13,611
2/29/92                         $13,205                         $13,620
3/31/92                         $13,169                         $13,575
4/30/92                         $13,266                         $13,694
5/31/92                         $13,412                         $13,817
6/30/92                         $13,615                         $14,016
7/31/92                         $14,068                         $14,383
8/31/92                         $13,850                         $14,275
9/30/92                         $13,975                         $14,365
10/31/92                        $13,830                         $14,319
11/30/92                        $14,047                         $14,492
12/31/92                        $14,173                         $14,593
1/31/93                         $14,388                         $14,750
2/28/93                         $14,876                         $15,135
3/31/93                         $14,640                         $14,963
4/30/93                         $14,753                         $15,060
5/31/93                         $14,795                         $15,113
6/30/93                         $15,033                         $15,317
7/30/93                         $14,986                         $15,327
8/31/93                         $15,294                         $15,536
9/30/93                         $15,515                         $15,648
10/31/93                        $15,533                         $15,671
11/30/93                        $15,407                         $15,626
12/31/93                        $15,688                         $15,840
1/31/94                         $15,860                         $15,989
2/28/94                         $15,473                         $15,690
3/31/94                         $15,064                         $15,340
4/29/94                         $15,124                         $15,495
5/31/94                         $15,232                         $15,582
6/30/94                         $15,181                         $15,546
7/29/94                         $15,411                         $15,715
8/31/94                         $15,464                         $15,791
9/30/94                         $15,327                         $15,672
10/31/94                        $15,148                         $15,584
11/30/94                        $14,939                         $15,485
12/30/94                        $15,104                         $15,621
1/31/95                         $15,390                         $15,771
2/28/95                         $15,682                         $16,000
3/31/95                         $15,896                         $16,254
4/28/95                         $15,958                         $16,298
5/31/95                         $16,310                         $16,655
6/30/95                         $16,228                         $16,668
7/31/95                         $16,400                         $16,901
8/31/95                         $16,560                         $17,072
9/30/95                         $16,685                         $17,123
10/31/95                        $16,862                         $17,195
11/30/95                        $17,036                         $17,341
12/31/95                        $17,146                         $17,437
1/31/96                         $17,343                         $17,644
2/29/96                         $17,286                         $17,584
3/31/96                         $17,030                         $17,491
4/30/96                         $17,041                         $17,465
5/31/96                         $17,049                         $17,444
6/30/96                         $17,144                         $17,568
7/31/96                         $17,359                         $17,684
8/31/96                         $17,351                         $17,721
9/30/96                         $17,484                         $17,854
10/31/96                        $17,666                         $18,020
11/30/96                        $17,942                         $18,270
12/31/96                        $17,872                         $18,243
1/31/97                         $17,897                         $18,292
2/28/97                         $18,015                         $18,422

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

PORTFOLIO AT A GLANCE
                                 2/28/97          8/31/96
Number of Securities               141              142
Weighted Average Maturity       7.6 years        7.7 years
Average Duration                5.4 years        5.4 years
Expense Ratio                    0.47%*            0.48%

* Annualized.


12   California Intermediate-Term Tax-Free          American Century Investments


                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

Management Q & A

An interview with Colleen Denzler,  a senior portfolio manager on the California
Tax-Free and Municipal funds management team.

How did the fund perform?

For the  six-month  period ended  February 28, 1997,  the fund's total return of
3.81% was slightly  lower than the 3.95%  average  return of the 31  "California
Intermediate Municipal Debt Funds" tracked by Lipper Analytical Services. From a
one-year perspective, the fund tracked its peer group average even more closely,
returning  4.21% compared to the 4.29% average return posted by the funds in its
Lipper  category.  (See the Total  Returns  table on the previous page for other
fund performance comparisons.)

The fund's returns typically seem to "hug the average" for the fund's investment
category. Why?

That's the way the fund was designed.  Our goal is to minimize price  volatility
while offering shareholders a competitive yield. The fund is more conservatively
styled than many of the funds in its Lipper category,  which includes funds with
a relatively broad range of investment  policies and objectives.  Because of the
fund's conservative stance, it will tend to outperform its category average in a
declining  market and lag the category  average during municipal market rallies.
Since the  municipal  bond market  experienced  both a  significant  rally and a
significant  sell-off  during the six-month  period,  the fund's return ended up
tracking its peer group average.

[bar graph - data below]

CALIFORNIA INTERMEDIATE-TERM TAX-FREE FISCAL YEAR-BY-YEAR RETURNS (periods
ended August 31)

              Intermediate-Term Tax-Free  Lehman 5-Year GO Index

1987*                    3.53%                     6.76%
1988                     3.90%                     4.05%
1989                     7.28%                     7.19%
1990                     6.16%                     5.91%
1991                     9.74%                    10.09%
1992                     9.18%                     9.93%
1993                    10.42%                     8.83%
1994                     1.11%                     1.64%
1995                     7.09%                     8.12%
1996                     4.79%                     3.80%

This chart  illustrates  the  historical  year-by-year  volatility of the fund's
returns over the past 10 years and compares them with the index's  returns.  The
fund's total returns include operating  expenses,  while the index's do not. See
page 40 for a definition of the index.


Semiannual Report                     California Intermediate-Term Tax-Free   13


                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

How was the fund positioned during the period?

There  has  been  a  growing  perception  in the  market  that  slowly  building
inflationary  pressures  would  cause the  Federal  Reserve to raise  short-term
interest rates. (The Fed did in fact raise rates a quarter of a percent on March
25.) This uncertainty in the market caused us to maintain a conservative stance,
keeping the fund's duration at 5.4 years--a  neutral position in comparison with
its peers.  This  neutral  stance  limited  the fund's  vulnerability  to rising
interest rates.

In the fund's August 31, 1996 annual report, we discussed the fact that the fund
is now allowed to invest in  BBB-rated  securities.  Have you added any of these
lower-rated securities to the fund's portfolio?

Yes. The fund's portfolio now includes a 1% weighting in BBB bonds. We'd like to
add more of these lower-quality securities to the portfolio,  but, frankly, with
credit  quality  spreads  (the  differences  between  the  yields of  high-rated
securities and those of lower-rated securities) as narrow as they are currently,
we don't think it makes sense to take on greater  credit risk  without  adequate
yield compensation for our shareholders.  Historically,  an investor could get a
significant  bump up in yield for taking on the additional  credit risk inherent
in a BBB bond.  Now an investor  may get very  little  extra yield for the added
risk.

What has caused this narrowing of credit quality spreads?

Several  factors have led to the compression of credit quality  spreads.  In the
nation  overall,  and in California in particular,  strong  economic  growth has
caused  a  general  improvement  in the  credit  quality  of  municipal  issues.
Municipal  bond  insurers,  trying  to gain  market  share,  have  insured  more
lower-quality issues, adding strength to the narrowing trend.

Municipal  fund  managers,  who  have  increasingly  looked  to  higher-yielding
securities  to  boost  fund  returns,  have  found  themselves  competing  for a
shrinking number of high-yield  issues.  Following the simple dynamics of supply
and demand,  more buyers competing for fewer bonds means higher prices and lower
yields for lower-quality bonds.

What is your outlook for California municipal securities going forward?

As in the past, the general outlook for interest rates is uncertain. The economy
continues to show solid growth,  but inflation has remained  relatively low. The
question is, are these conditions sustainable?  The Federal Reserve doesn't seem
to  think  so--in  March,  it  made  a  pre-emptive  strike  against  inflation,
ratcheting  short-term  interest  rates up by a quarter of a  percent.  Many Fed
watchers suspect this may be the first in a series of rate hikes.

[pie charts - data below]

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 2/28/97)  
Revenue 55% 
COPs/Leases 22% 
Prerefunded/ETM 9% 
GO 6% 
Land-Secured 6% 
Other 2%

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 8/31/96)  
Revenue 57% 
COPs/Leases 22% 
Prerefunded/ETM 7% 
GO 7% 
Land-Secured 5% 
Other 2%


14   California Intermediate-Term Tax-Free          American Century Investments


                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

If U.S.  economic growth slows,  the municipal market could rally. But with wage
pressures  increasing  the  threat of  inflation,  any  signs of an  overheating
economy could cause increased  anxiety among municipal  investors,  pushing bond
prices lower. We expect municipal issuance to remain light in the coming months,
which may  provide  some  support  for  municipal  prices.  We also  expect  the
strengthening  California  economy to keep credit quality spreads for California
issues very narrow.

What are your plans for the fund over the next six months?

Given the  likelihood  of higher  rates,  we will  probably  maintain the fund's
neutral duration,  and we may even shorten its duration slightly.  We would like
to increase the fund's holdings in BBB bonds if we can find issues that meet our
credit criteria and represent good value.  Toward this end, our municipal credit
research team will be a key resource as they search for  undervalued  securities
that we believe have the potential to appreciate.

[pie charts - data below]

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 2/28/97)
AAA 69%
AA 13%
A 17%
BBB 1%

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 8/31/96)
AAA 69%
AA 14%
A 17%


Semiannual Report                     California Intermediate-Term Tax-Free   15


                            SCHEDULE OF INVESTMENTS
                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                      Value
- --------------------------------------------------------------------------------
MUNICIPAL SECURITIES
$ 1,520,000    Alameda County Certificates of
               Participation, (Santa Rita Jail
               Project), 5.375%, 6-1-09 (MBIA)                     $1,549,974
  4,060,000    Burbank Redevelopment Agency
               West Olive Tax Allocation, Series
               1994, 6.50%, 12-1-01 (AMBAC)                         4,437,580
  1,175,000    California Educational Facility Auth.
               Rev., (Santa Clara University),
               5.25%, 9-1-10 (MBIA)                                 1,175,494
  5,000,000    California Educational Facility Auth.
               Rev., (Stanford University), 5.25%,
               12-1-99                                              5,171,300
  2,145,000    California Educational Facility Auth.
               Rev., Series 1989, (University of
               San Diego), 6.75%, 10-1-02
               (MBIA)                                               2,341,890
  3,145,000    California Health Facilities
               Financing Auth. Rev., Series A,
               (Insured Health Facility), 6.00%,
               7-1-04 (AMBAC)                                       3,396,160
  1,500,000    California Health Facilities
               Financing Auth. Rev., Series A,
               (Kaiser Permanente), 6.70%,
               10-1-99                                              1,588,230
  1,500,000    California Health Facilities
               Financing Auth. Rev., Series A,
               (Pomona Valley Hospital Medical
               Center), 6.75%, 1-1-07 (MBIA)                        1,609,770
  1,280,000    California Health Facilities
               Financing Auth. Rev., Series A,
               (St. Francis Memorial Hospital),
               5.25%, 11-1-99                                       1,304,179
  1,660,000    California Health Facilities
               Financing Auth. Rev., Series A,
               (St. Francis Memorial Hospital),
               5.375%, 11-1-00                                      1,697,300
  1,745,000    California Health Facilities
               Financing Auth. Rev., Series A,
               (St. Francis Memorial Hospital),
               5.625%, 11-1-02                                      1,806,878
  1,560,000    California Health Facilities
               Financing Auth. Rev., Series A,
               (St. Francis Memorial Hospital),
               5.75%, 11-1-04                                       1,623,617

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 3,250,000    California Public Works Board
               Energy-Efficiency Rev. Certificates
               of Participation, Series 1991 A,
               (Pooled Project), 6.00%, 9-1-99                     $3,391,050
  2,000,000    California Public Works Board
               Lease Rev., Series A, (University
               of California), 4.72%, 9-1-00(1)                     1,697,880
  3,500,000    California Public Works Board
               Lease Rev. Certificates of
               Participation, Series A, (University
               of California), 5.375%, 10-1-17
               (AMBAC)                                              3,385,585
  2,500,000    California State Department of
               Veteran's Affairs Rev., Series A,
               6.20%, 8-1-98                                        2,570,100
  4,795,000    California State Department Water
               Resource Central Valley Project
               Rev., Series J-2, (Water System),
               5.80%, 12-1-04                                       5,164,215
  3,710,000    California State Franchise Tax
               Board Certificates of Participation,
               6.90%, 10-1-06                                       3,990,958
  3,000,000    California State Public Works Board
               Lease Rev., Series 1992 A,
               (California State University),
               5.70%, 10-1-99                                       3,111,510
  3,500,000    California State Public Works
               Board Lease Rev. Certificates of
               Participation, Series A,
               (Department of Corrections),
               5.25%, 12-1-05 (AMBAC)                               3,625,195
  4,520,000    California State Public Works
               Board Lease Rev. Certificates of
               Participation, (Secretary of State),
               6.20%, 12-1-05 (AMBAC)                               4,979,639
  1,000,000    California State Public Works
               Board Lease Rev., Series A,
               (University of California Project),
               5.90%, 12-1-03 (AMBAC)                               1,077,650
  3,000,000    California State Public Works
               Board Lease Rev., Series A,
               (University of California), 6.15%,
               11-1-09                                              3,209,550
  5,000,000    California State Universities and
               Colleges Rev., 5.00%, 11-1-04
               (FGIC)                                               5,106,700

See Notes to Financial Statements


16   California Intermediate-Term Tax-Free          American Century Investments


                            SCHEDULE OF INVESTMENTS
                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 8,000,000    California Statewide Communities
               Development Auth. Certificates of
               Participation, (California Lutheran
               Homes), 5.375%, 11-15-06                            $8,135,600
  2,385,000    California Statewide Communities
               Development Auth. Certificates of
               Participation, (St. Joseph Health
               System), 6.50%, 7-1-03                               2,606,948
  2,545,000    Capistrano Unified Public Financing
               Auth. Special Tax Rev., Series A,
               (First Lien), 6.00%, 9-1-06
               (AMBAC)                                              2,760,798
  2,945,000    Castaic Lake Water Agency
               Certificates of Participation,
               Series A, 5.75%, 8-1-01 (MBIA)                       3,106,791
  1,000,000    Castaic Lake Water Agency
               Certificates of Participation,
               Series A, 7.25%, 8-1-09 (MBIA)                       1,193,980
  2,075,000    Chabot Las Positas Community
               College District Certificates of
               Participation, 5.50%, 12-1-10
               (FSA)                                                2,150,966
  1,465,000    City of Woodland Waste Water
               System Refunding Certificates of
               Participation, 6.00%, 3-1-06
               (AMBAC)                                              1,597,377
  7,935,000    Contra Costa California
               Transportation Auth. Sales
               Tax Rev., Series A, 6.00%,
               3-1-05 (FGIC)                                        8,603,048
  1,000,000    Contra Costa California
               Transportation Auth. Sales
               Tax Rev., Series A, 6.00%,
               3-1-07 (FGIC)                                        1,089,090
  2,585,000    Contra Costa County Certificates of
               Participation (Merrithew Memorial
               Hospital), 6.00%, 11-1-07 (MBIA)                     2,789,965
  2,500,000    Contra Costa County Public Facility
               Certificates of Participation,
               7.45%, 6-1-00 (BIGI)                                 2,707,000
  1,065,000    Contra Costa County Water District
               Rev., Series A, 7.00%, 10-1-00,
               Prerefunded at 102% of Par(2)                        1,181,564
  1,220,000    Coronado Community Development
               Agency Tax Allocation, 6.00%,
               9-1-08 (FSA)                                         1,328,568

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 2,000,000    East Bay Municipal Utilities District
               Wastewater System Rev., 6.00%,
               6-1-02 (FGIC)                                        2,147,740
  2,570,000    East Bay Municipal Utilities District
               Wastewater System Rev., 6.00%,
               6-1-05                                               2,753,524
  2,000,000    East Bay Municipal Utilities District
               Wastewater System Rev., 5.00%,
               6-1-06 (MBIA)                                       $2,028,720
  6,850,000    Imperial Irrigation District
               Certificates of Participation,
               (Electrical System Project),
               6.50%, 11-1-07 (MBIA)                                7,761,187
  2,770,000    Kern High School District GO,
               6.30%, 8-1-11 (MBIA)                                 3,068,938
  1,750,000    Loma Linda Hospital Rev.,
               (University Medical Center),
               6.95%, 12-1-05 (AMBAC)                               1,889,178
  2,300,000    Los Angeles Airport Rev., Series A,
               6.00%, 5-15-05 (FGIC)                                2,487,772
  4,000,000    Los Angeles Capital Asset Lease
               Rev. Certificates of Participation,
               5.875%, 12-1-05 (AMBAC)                              4,280,560
  1,000,000    Los Angeles Convention Center
               Certificates of Participation,
               6.75%, 8-15-01 (AMBAC)                               1,097,890
  1,155,000    Los Angeles Convention and
               Exhibition Center Auth. Lease Rev.,
               Series A, 6.00%, 8-15-10 (MBIA)                      1,255,924
  4,000,000    Los Angeles County Correctional
               Facility Project Certificates of
               Participation, 6.00%, 9-1-99
               (MBIA)(2)                                            4,193,480
  1,000,000    Los Angeles County Metropolitan
               Transit Auth. Sales Tax Rev.,
               5.90%, 7-1-06 (AMBAC)                                1,085,800
  1,900,000    Los Angeles County Metropolitan
               Transportation Auth. Sales Tax Rev.,
               Series A, (Proposition A), 5.50%,
               7-1-08 (MBIA)                                        1,970,509
  1,000,000    Los Angeles County Public
               Properties Certificates of
               Participation, 6.25%, 4-1-00
               (BIGI)                                               1,060,150
  3,900,000    Los Angeles County Transportation
               Commission Certificates of
               Participation, Series B, 6.00%,
               7-1-01                                               4,084,275

See Notes to Financial Statements

Semiannual Report                     California Intermediate-Term Tax-Free   17

                            SCHEDULE OF INVESTMENTS
                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 4,765,000    Los Angeles County Transportation
               Commission Certificates of
               Participation, Series B, 6.20%,
               7-1-03                                              $5,059,858
  2,000,000    Los Angeles County Transportation
               Commission Certificates of
               Participation, Series B, 6.25%,
               7-1-04                                               2,176,000
  4,000,000    Los Angeles County Transportation
               Commission Sales Tax Rev.,
               5.875%, 7-1-02 (FGIC)                                4,275,920
  2,500,000    Los Angeles County Transportation
               Commission Sales Tax Rev.,
               Series A, (Proposition A), 6.40%,
               7-1-02                                               2,719,425
  3,515,000    Los Angeles County Transportation
               Commission Sales Tax Rev.,
               Series A, (Proposition C), 6.20%,
               7-1-04                                               3,819,364
  3,765,000    Los Angeles County Transportation
               Commission Sales Tax Rev.,
               Series A, (Proposition C), 6.40%,
               7-1-06                                               4,175,046
  1,000,000    Los Angeles Department of Water
               and Power Electric Rev., 5.70%,
               1-15-05 (MBIA)                                       1,061,720
  1,000,000    Los Angeles Department of Water
               and Power Rev., 6.30%, 4-15-06
               (FGIC)                                               1,078,360
  4,685,000    Los Angeles Municipal Improvement
               Corporation Rev., 6.00%, 2-1-03
               (MBIA)                                               5,040,451
  2,000,000    Los Angeles Rev. Certificates of
               Participation, 6.40%, 11-1-97                        2,036,380
  2,045,000    Los Angeles Wastewater System
               Rev., Series A, 6.60%, 2-1-00
               (MBIA)                                               2,172,179
  1,000,000    Los Angeles Wastewater System
               Rev., Series B, 6.80%, 6-1-02                        1,084,610
  4,780,000    Los Angeles Wastewater System
               Rev., Series B, 6.20%, 6-1-06
               (AMBAC)                                              5,144,427
  2,785,000    Metropolitan Water District of
               Southern California, 5.00%,
               7-1-09                                               2,760,798

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 7,190,000    Metropolitan Water District of
               Southern California Rev., 6.50%,
               7-1-01, Prerefunded at 102%
               of Par(2)                                           $7,943,009
  1,000,000    Metropolitan Water District of
               Southern California Rev., 6.625%,
               7-1-01, Prerefunded at 102% of
               Par(2)                                               1,109,430
  4,590,000    Modesto, Stockton, Redding Public
               Power Agency Rev., Series G,
               (San Juan Project), 5.25%,
               7-1-11 (MBIA)                                        4,578,204
  1,100,000    Mojave California Water Agency
               Improvement District GO,
               (Morongo Basin), 5.40%,
               9-1-08 (FGIC)                                        1,133,187
  5,000,000    Northern California Power Agency
               Rev., (Geothermal Project 3),
               5.50%, 7-1-05 (AMBAC)                                5,250,200
  1,000,000    Oakland Pension Financing Auth.
               Rev. Certificates of Participation,
               Series 1988, 7.20% , 8-1-00
               (FGIC)                                               1,059,380
  1,165,000    Ontario Redevelopment Financing
               Auth. Local Agency Rev.,
               Series A, 5.80%, 9-2-06 (FSA)                        1,240,003
  7,500,000    Orange County Transportation Sales
               Tax Rev., 5.50%, 2-15-01
               (AMBAC)                                              7,805,250
  1,645,000    Orange County Transportation Sales
               Tax Rev., 5.75%, 2-15-05                             1,731,576
  3,000,000    Orange County Transportation Sales
               Tax Rev., 6.00%, 2-15-07 (FGIC)                      3,249,030
  1,250,000    Orange County Water District
               Certificates of Participation, Series
               1990, 7.00%, 8-15-00,
               Prerefunded at 102% of Par(2)                        1,387,863
  1,330,000    Oxnard Harbor District Rev., Series
               A, 7.00%, 8-1-04 (FSA)                               1,524,738
  1,000,000    Ramona Municipal Water District
               Certificates of Participation,
               6.90%, 10-1-01 (AMBAC)                               1,102,050
  1,060,000    Redding Joint Powers Financing
               Auth. Electric System Rev., Series
               A, 6.25%, 6-1-07 (MBIA)                              1,175,561

See Notes to Financial Statements

18   California Intermediate-Term Tax-Free          American Century Investments

                            SCHEDULE OF INVESTMENTS
                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 1,010,000    Richmond Joint Powers Financing
               Auth. Rev. Certificates of
               Participation, Series A, 5.30%,
               5-15-06                                           $  1,018,706
  2,080,000    Riverside County Public Financing
               Auth. Special Tax Rev., Series A,
               5.25%, 9-1-04 (MBIA)                                 2,163,012
  4,705,000    Riverside County Transit Sales Tax,
               6.00%, 6-1-09 (FGIC)                                 5,125,157
  4,000,000    Riverside County Transit Sales Tax
               Rev., Series A, 6.50%, 6-1-01
               (AMBAC)(2)                                           4,337,960
  1,225,000    Riverside County Transportation
               Commission Sales Tax Rev.,
               5.60%, 6-1-05 (AMBAC)                                1,298,353
  2,000,000    Riverside County Transportation
               Commission Sales Tax Rev.,
               Series A, 6.625%, 6-1-01,
               Prerefunded at 102% of Par(2)                        2,219,000
  1,025,000    Rocklin Unified School District
               Community Facility, 5.20%,
               9-1-09 (MBIA)                                        1,029,756
  5,710,000    Sacramento Municipal Utility District
               Electric Rev., Series C, 5.75%,
               11-15-07 (MBIA)                                      6,020,053
  6,825,000    Sacramento Municipal Utility District
               Electric Rev., Series 1991 Z,
               6.00%, 7-1-02 (FGIC)                                 7,335,988
  9,965,000    Sacramento Schools Auth. Rev.,
               (Workers Compensation
               Program C), 5.75%, 6-1-03(2)                        10,608,041
  1,205,000    Saddleback Valley Unified School
               District Public Financing Special
               Tax Rev., 6.00%, 9-1-11 (FSA)                        1,305,557
  5,000,000    San Bernardino County Certificates
               of Participation, Series A,
               (Medical Center Project), 5.75%,
               8-1-07 (MBIA)                                        5,345,600
  1,500,000    San Diego County Regional
               Transportation Commission Sales
               Tax Rev., Series A, 7.75%,
               4-1-99(2)                                            1,612,500
  3,800,000    San Diego County Water Auth.
               Certificates of Participation,
               Series A, 6.00%, 5-1-02                              4,054,828

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 7,200,000    San Diego County Water Auth.
               Certificates of Participation,
               Series A, 6.125%, 5-1-03                            $7,714,224
  4,400,000    San Diego County Water Auth.
               Certificates of Participation,
               Series A, 6.40%, 5-1-08                              4,710,244
  5,090,000    San Diego Public Facility Financing
               Auth. Sewer Rev., Series 1995,
               4.875%, 5-15-09 (FGIC)                               4,975,170
  3,505,000    San Diego Regional Transportation
               Commission Sales Tax Rev.,
               Series 1992, 5.50%, 4-1-04
               (FGIC)                                               3,690,625
  1,175,000    San Diego Regional Transportation
               Commission Sales Tax Rev.,
               Series 1992, 5.50%, 4-1-05
               (FGIC)                                               1,237,204
  4,000,000    San Diego Regional Transportation
               Commission Sales Tax Rev.,
               Series 1994 A, 6.00%, 4-1-04
               (FGIC)                                               4,326,600
  2,000,000    San Diego Water Auth. Rev.
               Certificates of Participation,
               5.681%, 4-23-08 (FGIC)                               2,095,920
  1,250,000    San Francisco Bay Area Rapid
               Transit Sales Tax Rev., 6.40%,
               7-1-05 (FGIC)                                        1,361,938
  1,000,000    San Francisco Bay Area Rapid
               Transit Sales Tax Rev., 5.35%,
               7-1-07 (FGIC)                                        1,033,720
  2,100,000    San Francisco City and County
               Airport Commission Rev.
               Refunding, 6.35%, 5-1-03 (MBIA)                      2,304,309
  2,410,000    San Francisco City and County
               Airport Commission Rev., Series
               Issue 2, 6.35%, 5-1-01 (MBIA)                        2,596,317
  3,405,000    San Francisco Port Commission
               Rev., 5.625%, 7-1-02                                 3,545,490
  2,275,000    San Jose California Redevelopment
               Agency Tax Allocation, 6.00%,
               8-1-08 (MBIA)                                        2,478,340
  3,300,000    San Jose California Redevelopment
               Agency Tax Allocation, 6.00%,
               8-1-09 (MBIA)                                        3,597,726

See Notes to Financial Statements


Semiannual Report                     California Intermediate-Term Tax-Free   19


                            SCHEDULE OF INVESTMENTS
                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 3,700,000    San Jose California Redevelopment
               Agency Tax Allocation, (Merged
               Area Redevelopment Project),
               6.00%, 8-1-06 (MBIA)                                $4,025,970
  6,400,000    San Jose California Redevelopment
               Agency Tax Allocation, (Merged
               Area Redevelopment Project),
               6.00%, 8-1-07 (MBIA)                                 6,977,280
  3,875,000    San Jose California Redevelopment
               Agency Tax Allocation, Series A,
               6.00%, 8-1-02 (MBIA)(2)                              4,154,775
  3,950,000    San Jose Financing Auth. Rev.
               Certificates of Participation,
               (Convention Center), 6.00%,
               9-1-05                                               4,186,526
  2,000,000    San Jose Financing Auth. Rev.
               Certificates of Participation,
               Series C, (Convention Center
               Project), 6.30%, 9-1-09                              2,114,620
  4,580,000    San Jose Financing Auth. Rev.
               Certificates of Participation,
               Series 1993, (Convention Center),
               6.10%, 9-1-06                                        4,814,130
  3,910,000    San Mateo County California
               Transportation Sales Tax Rev.,
               Series A, 5.00%, 6-1-08 (MBIA)                       3,928,103
  1,015,000    Santa Ana Police Administration
               Certificates of Participation, Series
               A, 5.50%, 7-1-07 (MBIA)                              1,056,666
  2,215,000    Santa Clara County Multi-Facilities
               Project Certificates of Participation,
               6.00%, 5-15-01 (AMBAC)                               2,358,111
  1,230,000    Santa Clara County Multi-Facilities
               Project Certificates of Participation,
               6.00%, 5-15-05 (AMBAC)                               1,317,366
  1,000,000    Signal Hill California Redevelopment
               Agency Tax Allocation, Series B,
               7.40%, 10-1-15, Prerefunded at
               100% of Par(2)                                       1,107,540
  1,785,000    South Sutter Hydroelectric
               Refunding Rev., 6.80%, 8-1-01
               (FGIC)                                               1,918,125
  2,000,000    Southern California Public Power
               Auth. Rev., 6.75%, 7-1-00                            2,143,140
  1,500,000    Southern California Public Power
               Auth. Rev., Series 1988 A, 7.00%,
               7-1-00                                               1,585,740

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 3,000,000    Southern California Public Power
               Auth. Rev., Series 1989, 6.75%,
               7-1-01                                            $  3,258,750
  3,090,000    Southern California Public Power
               Auth. Rev., Series 1992, 5.625%,
               7-1-03 (MBIA)                                        3,278,861
  4,065,000    Southern California Rapid Transit
               District Certificates of Participation,
               6.20%, 7-1-02 (MBIA)                                 4,397,598
  1,500,000    Southern California Rapid Transit
               District Certificates of Participation,
               (Workers Compensation), 6.50%,
               7-1-07 (MBIA)                                        1,633,740
  5,000,000    Southern California Rapid Transit
               District Certificates of Participation,
               (Workers Compensation), 6.40%,
               7-1-04 (MBIA)                                        5,402,550
  2,000,000    Stanislaus County Refunding
               Certificates of Participation, 5.50%,
               5-1-06 (MBIA)                                        2,094,460
  3,000,000    State of California GO, 6.80%,
               5-1-01 (AMBAC)                                       3,280,380
 10,000,000    State of California GO, 6.50%,
               3-1-02 (AMBAC)                                      10,931,400
  2,400,000    State of California GO, 6.00%,
               9-1-03 (MBIA)                                        2,597,640
  1,950,000    State of California GO, 6.75%
               2-1-06                                               2,211,963
  1,855,000    State of California GO, 7.00%,
               11-1-06 (FGIC)                                       2,166,937
  1,975,000    State of California GO, 5.50%,
               4-1-07 (MBIA)                                        2,069,168
  1,150,000    Taft Public Financing Auth. Lease
               Rev. Certificates of Participation,
               Series A, (Community Correctional
               Facility Project), 5.50%, 1-1-06                     1,159,522
  3,800,000    University of California Multipurpose
               Project Rev., Series A, 6.00%,
               9-1-02 (MBIA)                                        4,092,220
  1,950,000    University of California Rev.,
               (University of California Medical
               Center), 5.60%, 7-1-09 (AMBAC)                      2,018,250
  2,510,000    Watsonville California Hospital
               Insured Rev., Series A, (Watsonville
               Community Hospital), 5.45%,
               7-1-03                                              2,570,566

See Notes to Financial Statements


20   California Intermediate-Term Tax-Free          American Century Investments


                            SCHEDULE OF INVESTMENTS
                     CALIFORNIA INTERMEDIATE-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount  Value
$ 3,980,000   Whittier California Health Facility
              Rev., (Presbyterian Intercommunity),
              6.00%, 6-1-06 (MBIA)                               $    4,310,061
                                                                    -----------
Total Municipal Securities--98.8%                                   430,628,261
   (Cost $413,883,049)                                              -----------

SHORT-TERM MUNICIPAL SECURITIES
  1,000,000   Irvine Ranch Water District, VRDN,
              Series 1991 C, 3.25%, 3-3-97
              (LOC: Bank of America)                                  1,000,000
  4,300,000   Orange County Sanitation District
              Certificates of Participation, VRDN,
              3.40%, 3-3-97                                           4,300,000
                                                                    -----------
Total Short-Term
Municipal Securites-1.2%                                              5,300,000
   (Cost $5,300,000)                                                -----------
Total Investment Securites - 100.0%                                $435,928,261
   (Cost $419,183,049)                                              ===========

Notes to Schedule  of  Investments  
AMBAC = AMBAC  Indemnity  Corp.  
BIGI = Bond Investor's Guaranty Inc.
FGIC = Financial Guaranty Insurance Company
FSA = Financial Security Association
GO = General Obligation
MBIA = Municipal Bond Insurance Association
VRDN = Variable Rate Demand Note. Interest reset dates are indicated and used
in calculating the weighted average portfolio maturity. Rate shown is
effective February 28, 1997.
(1)  These securities are zero-coupon  municipal bonds. The yield to maturity at
     current market value is shown instead of a stated coupon rate.  Zero-coupon
     securities  are  purchased at a  substantial  discount  from their value at
     maturity.
(2)  Escrowed in U.S. Government Securities.

See Notes to Financial Statements


Semiannual Report                     California Intermediate-Term Tax-Free   21

<TABLE>
<CAPTION>

                          CALIFORNIA LONG-TERM TAX-FREE


                                             30-Day                  30-Day Tax-Equivalent Yields
                                                SEC            34.70%           37.42%            41.95%           45.22%
                                              Yield       Tax Bracket      Tax Bracket       Tax Bracket      Tax Bracket
                                              -----       -----------      -----------       -----------      -----------

CURRENT YIELD (as of February 28, 1997)
<S>                                           <C>               <C>              <C>               <C>              <C>  
California Long-Term Tax-Free ..............  4.90%             7.50%            7.83%             8.44%            8.94%

Yields are defined in the Glossary on page 41.
</TABLE>

<TABLE>

                                                                     AVERAGE ANNUAL RETURNS
                                           6 MONTHS            1 YEAR          3 YEARS           5 YEARS         10 YEARS
                                           --------            ------          -------           -------         --------

TOTAL RETURNS (as of February 28, 1997)
<S>                                           <C>               <C>              <C>               <C>              <C>  
California Long-Term Tax-Free ............... 5.19%             5.01%            5.70%             7.56%            6.78%
Lehman Long-Term Municipal Bond Index ....... 5.99%             6.18%            6.46%             8.33%            8.34%
Average California Municipal Debt Fund(1) ... 4.76%             4.81%            5.10%             6.94%            6.67%
Fund's Ranking Among California
Municipal Debt Funds(1) .....................    --      43 out of 98     16 out of 68       6 out of 50     15 out of 30

(1)According to Lipper Analytical Services.
</TABLE>

See pages 40-41 for more information  about returns,  the comparative  index and
Lipper fund rankings.

[line graph - data below]

GROWTH OF $10,000 OVER TEN YEARS

Value on 2/28/97

$10,000 investment made 2/28/87

           Lehman Long-Term Municipal Index          Long-Term Tax-Free

2/28/87                $10,000                            $10,000
3/31/87                 $9,853                             $9,955
4/30/87                 $9,300                             $9,127
5/31/87                 $9,197                             $9,015
6/30/87                 $8,904                             $9,261
7/31/87                 $8,987                             $9,325
8/31/87                 $9,027                             $9,338
9/30/87                 $8,658                             $8,888
10/31/87                $8,658                             $8,810
11/30/87                $8,934                             $9,125
12/31/87                $9,051                             $9,272
1/31/88                 $9,412                             $9,672
2/29/88                 $9,523                             $9,803
3/31/88                 $9,386                             $9,641
4/30/88                 $9,461                             $9,665
5/31/88                 $9,470                             $9,678
6/30/88                 $9,655                             $9,789
7/31/88                 $9,720                             $9,835
8/31/88                 $9,758                             $9,862
9/30/88                 $9,979                             $9,996
10/31/88               $10,206                            $10,190
11/30/88               $10,097                            $10,095
12/31/88               $10,272                            $10,239
1/31/89                $10,514                            $10,449
2/28/89                $10,367                            $10,358
3/31/89                $10,375                            $10,352
4/30/89                $10,680                            $10,569
5/31/89                $10,927                            $10,765
6/30/89                $11,093                            $10,915
7/31/89                $11,240                            $11,068
8/31/89                $11,069                            $10,886
9/30/89                $11,035                            $10,842
10/31/89               $11,181                            $10,967
11/30/89               $11,419                            $11,160
12/31/89               $11,503                            $11,238
1/31/90                $11,387                            $11,087
2/28/90                $11,515                            $11,228
3/31/90                $11,527                            $11,227
4/30/90                $11,386                            $11,048
5/31/90                $11,708                            $11,379
6/30/90                $11,823                            $11,492
7/31/90                $12,032                            $11,687
8/31/90                $11,745                            $11,394
9/30/90                $11,727                            $11,366
10/31/90               $11,975                            $11,654
11/30/90               $12,279                            $11,937
12/31/90               $12,333                            $11,980
1/31/91                $12,498                            $12,146
2/28/91                $12,586                            $12,184
3/31/91                $12,616                            $12,189
4/30/91                $12,812                            $12,408
5/31/91                $12,962                            $12,521
6/30/91                $12,938                            $12,456
7/31/91                $13,138                            $12,633
8/31/91                $13,327                            $12,792
9/30/91                $13,520                            $13,000
10/31/91               $13,661                            $13,115
11/30/91               $13,678                            $13,062
12/31/91               $14,004                            $13,394
1/31/92                $13,996                            $13,346
2/29/92                $14,018                            $13,385
3/31/92                $14,053                            $13,386
4/30/92                $14,187                            $13,501
5/31/92                $14,394                            $13,676
6/30/92                $14,673                            $13,931
7/31/92                $15,211                            $14,393
8/31/92                $15,007                            $14,145
9/30/92                $15,073                            $14,239
10/31/92               $14,822                            $13,887
11/30/92               $15,239                            $14,295
12/31/92               $15,437                            $14,486
1/31/93                $15,582                            $14,632
2/28/93                $16,307                            $15,321
3/31/93                $16,110                            $15,113
4/30/93                $16,331                            $15,343
5/31/93                $16,466                            $15,423
6/30/93                $16,775                            $15,713
7/30/93                $16,792                            $15,705
8/31/93                $17,222                            $16,129
9/30/93                $17,446                            $16,347
10/31/93               $17,479                            $16,349
11/30/93               $17,268                            $16,141
12/31/93               $17,713                            $16,478
1/31/94                $17,922                            $16,707
2/28/94                $17,329                            $16,319
3/31/94                $16,294                            $15,538
4/29/94                $16,420                            $15,509
5/31/94                $16,612                            $15,704
6/30/94                $16,413                            $15,633
7/29/94                $16,834                            $15,966
8/31/94                $16,870                            $16,003
9/30/94                $16,478                            $15,725
10/31/94               $15,972                            $15,432
11/30/94               $15,551                            $15,137
12/30/94               $16,103                            $15,405
1/31/95                $16,811                            $15,896
2/28/95                $17,496                            $16,347
3/31/95                $17,706                            $16,504
4/28/95                $17,697                            $16,517
5/31/95                $18,451                            $17,080
6/30/95                $18,111                            $16,788
7/31/95                $18,203                            $16,900
8/31/95                $18,460                            $17,157
9/30/95                $18,604                            $17,311
10/31/95               $19,054                            $17,680
11/30/95               $19,546                            $18,140
12/31/95               $19,851                            $18,456
1/31/96                $19,936                            $18,496
2/29/96                $19,693                            $18,351
3/31/96                $19,333                            $17,930
4/30/96                $19,255                            $17,822
5/31/96                $19,265                            $17,856
6/30/96                $19,562                            $18,078
7/31/96                $19,755                            $18,299
8/31/96                $19,730                            $18,316
9/30/96                $20,168                            $18,598
10/31/96               $20,414                            $18,817
11/30/96               $20,853                            $19,201
12/31/96               $20,727                            $19,115
1/31/97                $20,686                            $19,101
2/28/97                $20,288                            $19,267

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

PORTFOLIO AT A GLANCE
                                 2/28/97          8/31/96
Number of Securities               90               85
Weighted Average Maturity      19.2 years       18.8 years
Average Duration                7.7 years        8.0 years
Expense Ratio                    0.47%*            0.48%

* Annualized.


22   California Long-Term Tax-Free                  American Century Investments


                         CALIFORNIA LONG-TERM TAX-FREE

Management Q & A

An interview with Dave MacEwen,  vice president and senior portfolio  manager on
the California Tax-Free and Municipal funds management team.

How did the fund perform?

The fund  managed  a strong  performance  in  comparison  with  its  peers,  but
underperformed  its benchmark index. For the six-month period ended February 28,
1997, the fund's total return was 5.19%,  compared with the 4.76% average return
of the 100  "California  Municipal  Debt  Funds"  tracked  by Lipper  Analytical
Services and the 5.99% return of the Lehman Long-Term Municipal Bond Index. (See
the  Total  Returns  table on the  previous  page  for  other  fund  performance
comparisons.)

Why did the fund perform well against its peers?

One  contributing  factor was the  fund's  relatively  conservative  positioning
during the period compared with some of the funds in its Lipper  category.  This
conservative  approach  allowed the fund to perform  well  despite the  market's
shifting interest rate expectations (see page 3).

The fund's  sizable  exposure to A-rated bonds also helped.  These bonds were in
fairly high demand from  individual  investors  during much of the period.  As a
result,  we were able to sell some of these  securities at a profit,  increasing
the fund's returns.

[bar graph - data below]

CALIFORNIA LONG-TERM TAX-FREE FISCAL YEAR-BY-YEAR RETURNS (Periods ended
August 31)

             Long-Term Tax-Free      Lehman Long-Term Municipal Index

1987*              -0.31%                          3.48%
1988                5.61%                          8.10%
1989               10.39%                         13.44%
1990                4.66%                          6.11%
1991               12.26%                         13.47%
1992               10.58%                         12.60%
1993               14.02%                         14.76%
1994               -0.78%                         -2.05%
1995                7.21%                          9.43%
1996                6.77%                          6.88%

This chart  illustrates  the  historical  year-by-year  volatility of the fund's
returns over the past 10 years and compares them with the index's  returns.  The
fund's total returns include operating  expenses,  while the index's do not. See
page 40 for a definition of the index.


Semiannual Report                             California Long-Term Tax-Free   23


                         CALIFORNIA LONG-TERM TAX-FREE

Did you change the fund's positioning over the past six months?

We made only  slight  adjustments  to the  fund's  positioning.  Choosing a more
conservative  approach, we maintained the fund's duration in a relatively narrow
range around eight years during the six-month period.  The lack of new municipal
securities  made it  difficult  to  significantly  alter the  fund's  structure.
Therefore,  the  fund  remained  slightly  barbelled,  but  with  some  laddered
maturities.

If not by duration management or portfolio structuring, how did you add value to
the fund?

Careful selection of attractively priced securities was the main vehicle we used
to  enhance  the  fund's  returns.  However,   improving  credit  conditions  in
California made this task more difficult. That's because the spread, or interest
rate difference, between comparable-maturity municipal securities with different
credit  ratings  continued to decrease as investors  reached for higher  yields.
Thanks to our strong  municipal  credit research team, we were able to find many
securities  that  we  believed  were   undervalued  and  had  the  potential  to
appreciate.

Was  the  credit  team  instrumental  in  locating  the  lower-rated   municipal
securities now held in the fund's portfolio?

Yes. We relied on our credit team to help us evaluate such securities,  which we
must  carefully  screen  before  adding them to the fund's  portfolio.  Although
attractively  priced  lower-rated  municipal  securities that measured up to our
standards proved  relatively few and far between,  we did find some in December.
The fund's  position  in  lower-rated  securities  now  totals  around 5% of net
assets.  We will likely enlarge this position if appropriate  securities  become
available.  Having the ability to purchase the full spectrum of investment grade
securities for the fund,  including  securities rated BBB, has helped us stay in
stride with our competitors.

What is the outlook for municipal securities going forward?

In March of this  year,  concerns  about  rising  interest  rates  were  finally
realized when, for the first time since February 1995, short-term interest rates
were  ratcheted  upward by the Federal  Reserve in a preemptive  strike  against
inflation.  The question on the minds of many  investors is whether this is only
the


[pie charts - data below]

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 2/28/97)  
Revenue 44% 
COPs/Leases 25% 
Land-Secured 14% 
Prerefunded/ETM 7% 
GO 4% 
Other 6%

PORTFOLIO  COMPOSITION BY SECURITY TYPE (as of 8/31/96)  
Revenue 46% 
COPs/Leases 22% 
Land-Secured 15% 
Prerefunded/ETM 7% 
GO 4% 
Other 6%


24   California Long-Term Tax-Free                  American Century Investments


CALIFORNIA LONG-TERM TAX-FREE

first rate hike in an upward trend.  This question is made more unclear  because
current economic  conditions  suggest that inflation can remain tame even as the
economy flourishes.  If U.S. economic growth slows,  municipal  securities could
rally. But, with wage pressures increasing the threat of inflation, any signs of
an  overheating  economy will likely cause  increased  anxiety  among  municipal
investors, pushing bond prices lower.

With this outlook in mind, what are your plans for the fund going forward?

With the possibility of higher rates looming, we will likely maintain the fund's
neutral  stance,  lengthening  or shortening  the fund's  duration as conditions
warrant.  We will  also  continue  to favor a bias  toward a  barbell  portfolio
structure  until the market  breaks out of its  current  trading  range.  If the
economic  outlook  does  change  dramatically,  we  believe  that  the  fund  is
positioned with the flexibility to respond  appropriately.  In addition, we will
continue to utilize our credit research team to look for undervalued  securities
that we believe have the potential to appreciate.

[pie charts - data below]

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 2/28/97)
AAA 42%
AA 19%
A 34%
BBB 5%

PORTFOLIO COMPOSITION BY CREDIT RATING (as of 8/31/96)
AAA 47%
AA 15%
A 38%


Semiannual Report                             California Long-Term Tax-Free   25


                            SCHEDULE OF INVESTMENTS
                         CALIFORNIA LONG-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                      Value
- --------------------------------------------------------------------------------
MUNICIPAL SECURITIES
$ 2,300,000   Alameda County Certificates of
              Participation, 5.79%, 6-15-17
              (MBIA)(1)                                            $  722,085
  2,700,000   Brea Public Financing Auth. Rev.,
              Series 1991, (Project Area AB),
              7.00%, 8-1-15 (MBIA)                                  2,993,355
  2,920,000   Brea Redevelopment Agency Tax,
              6.125%, 8-1-13 (MBIA)                                 3,075,782
  2,000,000   California Educational Facility Auth.
              Rev., (Loyola Marymount
              University), 5.75%, 10-1-24                           1,971,300
  2,000,000   California Educational Facility Auth.
              Rev., (University of San Francisco),
              6.00%, 10-1-26 (MBIA)                                 2,068,280
  1,300,000   California Educational Facility Auth.
              Rev., Series I, (Stanford University),
              7.125%, 1-1-19                                        1,387,945
  1,500,000   California Educational Facility Auth.
              Rev., Series A, (University of
              Southern California), 5.70%,
              10-1-15                                               1,484,310
  5,000,000   California Health Facilities Financing
              Auth. Rev., 6.00%, 7-1-25 (MBIA)                      5,108,900
  2,500,000   California Health Facilities Financing
              Auth. Rev., Series 1985 A,
              (Adventist Health), 6.75%,
              3-1-14 (MBIA)                                         2,715,750
  2,775,000   California Health Facilities Financing
              Auth. Rev., Series A, (Episcopal
              Homes), 7.80%, 7-1-15                                 2,951,546
  1,730,000   California Health Facilities Financing
              Auth. Rev., Series A,
              (Gould Medical), 7.30%, 4-1-20(2)                     1,953,084
  1,500,000   California Health Facilities Financing
              Auth. Rev., Series 1988 A, (H.M.
              Newhall Memorial Hospital), 8.00%,
              10-1-18                                               1,612,575
  6,420,000   California Health Facilities Financing
              Auth. Rev., (Kaiser Permanente),
              7.00%, 10-1-18                                        6,918,449
  3,000,000   California Health Facilities Financing
              Auth. Rev., Series A, (Kaiser
              Permanente), 5.45%, 10-1-09(1)                        1,524,330

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 4,915,000   California Health Facilities
              Financing Auth. Rev., Series A,
              (Kaiser Permanente), 6.50%,
              12-1-20                                            $  5,248,532
  2,000,000   California Health Facilities
              Financing Auth. Rev., Series A,
              6.75%, 3-1-20                                         2,139,980
  5,165,000   California Health Facilities
              Financing Auth. Rev., Series C,
              (St. Francis Memorial Hospital),
              5.875%, 11-1-23                                       5,312,822
  1,150,000   California Housing Finance Agency
              Rev., Series C, (Home Mortgage),
              6.80%, 8-1-17                                         1,212,710
  5,125,000   California Housing Finance Agency
              Rev., Series 1994 G, (Home
              Mortgage), 7.25%, 8-1-17                              5,511,989
  1,400,000   California Housing Finance Agency
              Rev., (Multi-Unit), 6.75%, 2-1-09                     1,410,878
  1,290,000   California Housing Finance Agency
              Rev., (Multi-Unit Rental), 6.875%,
              2-1-22                                                1,301,288
  1,500,000   California Pollution Control
              Financing Auth. Rev., Series D,
              (Southern California Edison),
              6.85%, 12-1-08                                        1,594,425
  2,755,000   California State Department of
              Water, 5.00%, 12-1-19                                 2,502,422
  1,000,000   California State Franchise Tax
              Board Certificates of
              Participation, 6.90%, 10-1-06                         1,075,730
  3,000,000   California State GO, 6.125%,
              10-1-11 (AMBAC)                                       3,285,990
  1,410,000   California State GO, Series 1984
              B, (New Prison Construction),
              10.00%, 8-1-03                                        1,826,105
  1,150,000   California State Public Works
              Board Lease Rev. Certificates of
              Participation, Series A,
              (Department of Corrections
              State Prisons), 5.25%, 12-1-13
              (AMBAC)                                               1,137,902
 17,100,000   California State Public Works
              Board Lease Rev. Certificates of
              Participation, Series A,
              (Department of Corrections
              State Prisons), 5.25%, 6-1-15
              (FSA)                                                16,773,903

See Notes to Financial Statements


26   California Long-Term Tax-Free                  American Century Investments


                            SCHEDULE OF INVESTMENTS
                         CALIFORNIA LONG-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 1,000,000   California State Public Works
              Board Lease Rev. Certificates of
              Participation, Series B, (Various
              University of California Projects),
              6.625%, 12-1-19                                      $1,150,160
  4,000,000   California Statewide Community
              Development Auth. Certificates of
              Participation, (Sisters of Charity
              Leavenworth), 5.00%, 12-1-23                          3,559,960
  4,500,000   California Statewide Community
              Development Auth. Certificates of
              Participation, (United Medical
              Center), 6.75%, 12-1-01,
              Prerefunded at 102% of Par(2)                         5,044,005
  5,695,000   Capistrano California School District
              Special Tax, (Refunding Issue
              1988-1), 6.50%, 9-1-14 (FSA)                          6,321,564
  4,475,000   City of Pittsburgh Redevelopment
              Agency, 6.20%, 8-1-19                                 4,492,050
  5,000,000   City of Pittsburgh Redevelopment
              Agency, 6.25%, 8-1-26                                 5,042,250
  1,000,000   Coachella Valley Water District #71
              Certificates of Participation, (Flood
              Control Project), 6.75%, 10-1-12                      1,071,920
  8,000,000   Compton Redevelopment Agency
              Tax Allocation, Series 1995 A,
              6.50%, 8-1-13 (FSA)                                   8,768,240
  2,580,000   Concord Joint Power Financing
              Auth. Lease Rev. Certificates of
              Participation, Series 1993, (Police
              Facilities Project), 5.25%, 8-1-13                    2,501,232
  5,000,000   Irvine Ranch Water District Joint
              Powers Agency Rev., 7.80%,
              2-15-08 (FGIC)                                        5,167,450
  1,900,000   Irvine Ranch Water District Joint
              Powers Agency Rev., 7.875%,
              2-15-23                                               1,961,503
  1,815,000   Kern County High School District
              GO, 7.15%, 8-1-14, (MBIA)(2)                          2,197,293
  3,555,000   Long Beach California Water Rev.,
              6.125%, 5-1-19                                        3,691,014
  1,305,000   Los Altos California Association of
              Bay Area Governments
              Certificates of Participation,
              5.90%, 5-1-27                                         1,321,926

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 1,000,000   Los Angeles California Municipal
              Improvement Corp. Lease Rev.,
              Series A, (Library Project), 7.10%,
              6-1-99, Prerefunded at 102% of
              Par(2)                                               $1,085,990
  3,475,000   Los Angeles Community
              Redevelopment Agency Housing
              Rev., Series A, 6.45%, 7-1-17
              (AMBAC)                                               3,615,460
  3,000,000   Los Angeles County Transportation
              Commission Sales Tax Rev.,
              Series A, 7.40%, 7-1-15                               3,248,970
  4,050,000   Los Angeles County Transportation
              Commission Sales Tax Rev.,
              Series A, (Capital Appreciation),
              4.74%, 7-1-02 (MBIA)(1)                               3,023,365
  1,000,000   Los Angeles Transportation Sales
              Tax Rev., 6.50%, 7-1-13 (MBIA)                        1,090,550
  2,420,000   Los Angeles Waste Water System
              Rev., Series C, 6.90%, 6-1-09                         2,592,642
  3,050,000   Los Angeles Waste Water System
              Rev., Series C, 7.10%, 6-1-18                         3,265,513
  1,865,000   Mendocino Coast Health Care
              District Health Care Facility Rev.,
              5.875%, 2-1-20                                        1,866,380
  5,250,000   Metropolitan Water District of
              Southern California Rev., 5.00%,
              7-1-27                                                4,767,578
  2,650,000   Metropolitan Water District of
              Southern California Waterworks
              Rev., 6.625%, 7-1-01,
              Prerefunded at 102% of Par(2)                         2,939,990
  5,830,000   Modesto, Stockton, Redding Public
              Power Agency Rev., Series D,
              (San Juan Project), 6.75%,
              7-1-20 (MBIA)                                         6,709,339
  1,000,000   Moulton-Niguel California Water
              District GO, 5.00%, 9-1-19
              (MBIA)                                                  906,560
  4,875,000   Northern California Power Agency
              Public Power Rev., (Hydroelectric
              Project #1), 7.15%, 7-1-24                            5,117,141
  3,000,000   Oakland California Redevelopment
              Agency Tax Allocation, (Central
              District Redevelopment Tax),
              5.50%, 2-1-14 (AMBAC)                                 3,041,190

See Notes to Financial Statements


Semiannual Report                             California Long-Term Tax-Free   27


                            SCHEDULE OF INVESTMENTS
                         CALIFORNIA LONG-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 5,150,000   Open Space District Midpeninsula
              GO, (Santa Clara, San Mateo
              Counties), 7.00%, 9-1-14                             $5,645,482
  4,750,000   Orange County Certificates of
              Participation, (Civic Center
              Expansion), 6.70%, 8-1-01,
              Prerefunded at 102% of Par
              (AMBAC)(2)                                            5,299,148
  3,000,000   Orange County Water District
              Certificates of Participation,
              Series 1989, 6.50%, 8-15-11
              (AMBAC)                                               3,199,050
  1,000,000   Orange County West Valley
              Detention Center Certificates of
              Participation, 7.625%, 6-1-99,
              Prerefunded at 102% of Par(2)                         1,095,160
  1,855,000   Pacifica Financing Auth. Sewer
              Rev., 6.20%, 8-1-26                                   1,846,189
  1,000,000   Pasadena Certificates of
              Participation, (Old Pasadena
              Parking Facility Project), 6.25%,
              1-1-18                                                1,069,660
  2,100,000   Pomona Public Financing Auth. Rev.,
              Series A, (Water Treatment Project),
              6.10%, 7-1-17 (AMBAC)                                 2,173,164
  1,000,000   Saddleback Valley Unified School
              District Public Financing Special
              Tax Rev., 6.00%, 9-1-16 (FSA)                         1,064,940
  6,000,000   San Bernardino Joint Powers
              Financing Auth. Lease Rev.
              Certificates of Participation,
              Series A, 5.50%, 12-1-20                              5,742,780
  3,400,000   San Diego County Certificates of
              Participation, 5.625%, 9-1-12
              (AMBAC)                                               3,501,218
  3,500,000   San Diego County Regional
              Transportation Sales Tax Rev.,
              Series A, 4.75%, 4-1-04(1)(2)                         2,508,905
  1,000,000   San Francisco City and County
              Redevelopment Hotel Tax Rev.,
              6.75%, 7-1-15 (FSA)                                   1,119,280
  5,500,000   San Jose California Financing Auth.
              Rev. Certificates of Participation,
              Series B, (Community Facilities
              Project), 5.625%, 11-15-18                            5,351,665

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 3,000,000   San Jose California Financing Auth.
              Rev. Certificates of Participation,
              Series C, (Convention Center
              Project), 6.375%, 9-1-13                             $3,136,140
  5,000,000   San Jose California Financing Auth.
              Rev. Certificates of Participation,
              Series D, (Central Service Yard),
              5.25%, 10-15-23                                       4,619,400
  9,525,000   San Jose California Redevelopment
              Agency Tax Allocation, Series D,
              (Merged Area Redevelopment
              Project), 5.75%, 8-1-24                               9,534,334
  3,475,000   San Mateo Joint Power Finance
              Auth. Lease Rev. Certificates of
              Participation, 6.50%, 7-1-16
              (MBIA)                                                3,909,757
  4,000,000   San Mateo Joint Power Finance
              Auth. Lease Rev. Certificates of
              Participation, (Capital Projects
              Program), 6.00%, 7-1-19 (MBIA)                        4,252,400
  3,500,000   Santa Ana Finance Auth. Lease
              Rev. Certificates of Participation,
              6.25%, 7-1-15 (MBIA)                                  3,858,400
  3,000,000   Santa Monica Community College
              District Certificates of Participation,
              Series A, 5.90%, 2-1-27                               3,016,440
  1,425,000   Southern California Public Power
              Auth. Rev., Series 1989,
              (Transportation Auth.), 7.00%,
              7-1-09 (FGIC)                                         1,530,036
  7,315,000   Southern California Public Power
              Auth. Rev., Series 1989, 6.75%,
              7-1-12 (FSA)                                          8,498,567
  3,730,000   Southern California Public Power
              Auth. Rev., Series 1989,
              (Multipurpose Projects), 6.75%,
              7-1-13 (FSA)                                          4,336,200
  3,260,000   Southern California Public Power
              Auth. Rev., Series 1989, 6.00%,
              7-1-18                                                3,293,512
  3,000,000   Southern California Public Power
              Auth. Rev., Series A, 4.84%,
              7-1-04 (AMBAC)(1)                                     2,111,730
  2,000,000   Southern Orange County Finance
              Auth. Special Tax Rev., Series A,
              7.00%, 9-1-11 (MBIA)                                  2,364,700

See Notes to Financial Statements


28   California Long-Term Tax-Free                  American Century Investments


                            SCHEDULE OF INVESTMENTS
                         CALIFORNIA LONG-TERM TAX-FREE

FEBRUARY 28, 1997 (UNAUDITED)

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 2,000,000   Taft California Public Financing
              Auth. Lease Rev. Certificates of
              Participation, Series A,
              (Community Correctional Facility),
              6.05%, 1-1-17                                    $    2,004,000
  3,020,000   Watsonville California Hospital
              Insured Rev., Series A, (Watsonville
              Community Hospital), 6.20%,
              7-1-12                                                3,188,637
                                                                  -----------
Total Municipal Securities--93.4%                                 281,654,496
   (Cost $267,477,064)                                            -----------

MUNICIPAL DERIVATIVES(3)
  8,000,000   Metropolitan Water District of
              Southern California Waterworks
              Rev., (Linked), Inverse Floater,
              5.75%, 8-10-18                                        8,159,120
  4,000,000   Northern California Transmission
              Rev., Inverse Floater, 6.92%,
              4-29-24 (MBIA)                                        3,595,000
                                                                  -----------
Total Municipal Derivatives--3.9%                                  11,754,120
   (Cost $11,963,920)                                             -----------

SHORT-TERM MUNICIPAL SECURITIES
  1,000,000   California Pollution Control
              Financing Auth. Rev., Series C,
              (Southern California Edison),
              VRDN, 3.45%, 3-3-97                                   1,000,000
  2,000,000   California Statewide Communities
              Development Auth. Certificates of
              Participation, VRDN, 3.35%                            2,000,000

Principal Amount                                                        Value
- --------------------------------------------------------------------------------
$ 3,000,000   Orange County Sanitation Districts
              Certificates of Participation,
              Series C, VRDN, 3.40%, 3-3-97                      $  3,000,000
  2,100,000   Orange County Water District
              Certificates of Participation,
              Series B, VRDN, 3.25%, 3-3-97                         2,100,000
                                                                  -----------
Total Short-Term
Municipal Securities--2.7%                                          8,100,000
   (Cost $8,100,000)                                              -----------
Total Investment Securities--100.0%                              $301,508,616
   (Cost $287,540,985)                                            ===========

Notes to Schedule of Investments
AMBAC = AMBAC Indemnity Corp.
FSA = Financial Security Association
GO = General Obligation
MBIA = Municipal Bond Insurance Association
VRDN = Variable Rate Demand Note.  Interest  reset date is indicated and used in
calculating the weighted  average  portfolio  maturity.  Rate shown is effective
February 28, 1997.
(1)  These securities are zero-coupon  municipal bonds. The yield to maturity at
     current market value is shown instead of a stated coupon rate.  Zero-coupon
     securities  are  purchased at a  substantial  discount  from their value at
     maturity.
(2)  Escrowed in U.S. Government Securities.
(3)  These securities are inverse  floaters.  They bear interest rates that move
     inversely  to  market  interest  rates.  Inverse  floaters  typically  have
     durations twice as long as long-term bonds,  which may cause their value to
     be twice as volatile as long-term  bonds when interest  rates  change.  The
     Long-Term Fund is limited to 10% of its net assets in inverse floaters.

See Notes to Financial Statements


Semiannual Report                             California Long-Term Tax-Free   29

<TABLE>
<CAPTION>

                                    STATEMENTS OF ASSETS AND LIABILITIES

FEBRUARY 28, 1997 (UNADITIED)
                                                      LIMITED-TERM      INTERMEDIATE-TERM    LONG-TERM
                                                        TAX-FREE            TAX-FREE         TAX-FREE
ASSETS
<S>                                                      <C>               <C>              <C>      
Investment securities, at value
     (identified cost of $112,440,674, $419,183,049,
     and $287,540,985, respectively) (Note 3)......   $113,734,188      $435,928,261     $301,508,616
Cash ..............................................             --           470,720               --
Receivable for investments sold....................      1,030,020                --               --
Interest receivable................................      1,442,228         6,237,286        3,802,453
Prepaid expenses and other assets..................          4,051             7,316            6,196
                                                             -----             -----            -----
                                                       116,210,487       442,643,583      305,317,265
                                                       -----------       -----------      -----------

LIABILITIES
Disbursements in excess of demand deposit cash.....        919,191           878,041        2,526,705
Payable for investments purchased..................      5,364,305         4,544,991        1,468,272
Payable for capital shares redeemed................        240,014           210,190           71,086
Payable to affiliates (Note 2).....................         38,818           153,051          104,315
Dividends payable..................................          8,496             2,149            6,473
Accrued expenses and other liabilities.............          2,562            10,500            5,454
                                                             -----            ------            -----
                                                         6,573,386         5,798,922        4,182,305
                                                         ---------         ---------        ---------
Net Assets Applicable to Outstanding Shares........   $109,637,101      $436,844,661     $301,134,960
                                                      ============      ============     ============

CAPITAL SHARES
Outstanding (Unlimited number of shares authorized)     10,684,893        39,144,232       26,617,198
                                                        ==========        ==========       ==========
Net Asset Value Per Share..........................         $10.26            $11.16           $11.31
                                                            ======            ======           ======

NET ASSETS CONSIST OF:
Capital paid in....................................   $109,410,604      $418,837,497     $285,167,542
Accumulated undistributed net realized gain
(loss) on investments..............................     (1,067,017)        1,261,952        1,999,787
Net unrealized appreciation on investments (Note 3)      1,293,514        16,745,212       13,967,631
                                                         ---------        ----------       ----------
                                                      $109,637,101      $436,844,661     $301,134,960
                                                      ============      ============     ============
</TABLE>

See Notes to Financial Statements


30   Statements of Assets and Liabilities           American Century Investments

<TABLE>
<CAPTION>

                            STATEMENTS OF OPERATIONS

                                                                      LIMITED-TERM     INTERMEDIATE-TERM    LONG-TERM
                                                                        TAX-FREE           TAX-FREE         TAX-FREE

For the Six Months Ended February 28, 1997 (Unaudited)

INVESTMENT INCOME
Income:
<S>                                                                     <C>             <C>              <C>         
Interest....................................................            $2,489,375      $11,493,098      $  8,648,868
                                                                        ----------      -----------      ------------

Expenses (Note 2):
Investment advisory fees....................................               152,900          626,569           423,804
Administrative fees.........................................                50,436          206,516           139,693
Transfer agency fees........................................                22,139           92,266            60,492
Printing and postage........................................                 7,727           32,404            21,993
Auditing and legal fees.....................................                 6,652           18,919            13,648
Custodian fees..............................................                 5,343           14,598            10,155
Directors' fees and expenses................................                 3,343            5,277             4,450
Telephone expenses..........................................                 1,117            3,768             2,934
Registration and filing fees................................                 1,769            1,470             2,551
Other operating expenses....................................                 8,582           23,698            14,269
                                                                             -----           ------            ------
                                                                           260,008        1,025,485           693,989
                                                                           -------        ---------           -------
Net investment income.......................................             2,229,367       10,467,613         7,954,879
                                                                         ---------       ----------         ---------

REALIZED AND UNREALIZED GAIN ON INVESTMENTS (NOTE 3)
Net realized gain on investments............................                84,323        1,412,424         2,141,773
Change in net unrealized appreciation on investments........               614,994        4,301,615         5,027,196
                                                                           -------        ---------         ---------
Net realized and unrealized
gain on investments ........................................               699,317        5,714,039         7,168,969
                                                                           -------        ---------         ---------
Net Increase in Net Assets
Resulting from Operations...................................            $2,928,684      $16,181,652       $15,123,848
                                                                        ==========      ===========       ===========
</TABLE>

See Notes to Financial Statements


Semiannual Report                                  Statements of Operations   31

<TABLE>
<CAPTION>

                       STATEMENTS OF CHANGES IN NET ASSETS

Six Months Ended February 28, 1997 (Unaudited) AND YEAR ENDED AUGUST 31, 1996

                                                        LIMITED-TERM                 INTERMEDIATE-TERM             LONG-TERM
                                                          TAX-FREE                       TAX-FREE                  TAX-FREE

Increase (Decrease) in Net Assets                     1997           1996           1997         1996          1997           1996
OPERATIONS
<S>                                             <C>            <C>           <C>          <C>            <C>           <C>        
Net investment income.....................      $2,229,367     $4,255,556    $10,467,613  $20,942,789    $7,954,879    $15,704,747
Net realized gain on investments..........          84,323        268,474      1,412,424    3,000,776     2,141,773        780,713
Change in net unrealized
     appreciation (depreciation)
     on investments.......................         614,994      (634,911)      4,301,615  (3,916,167)     5,027,196      2,019,723
                                                   -------      --------       ---------  ----------      ---------      ---------
Net increase in net assets
     resulting from operations............       2,928,684      3,889,119     16,181,652   20,027,398    15,123,848     18,505,183
                                                 ---------      ---------     ----------   ----------    ----------     ----------

DISTRIBUTIONS TO SHAREHOLDERS
From net investment income................     (2,242,900)    (4,248,485)   (10,473,972) (20,936,393)   (7,961,028)   (15,699,168)
From net realized gains
     from investment transactions.........             --             --     (1,183,599)          --      (424,490)             --
                                                 ---------      ---------     ----------   ----------    ----------     ----------
Decrease in net assets
     from distributions...................     (2,242,900)    (4,248,485)   (11,657,571) (20,936,393)   (8,385,518)   (15,699,168)
                                               ----------     ----------    -----------  -----------    ----------    ----------- 

CAPITAL SHARE TRANSACTIONS
Proceeds from shares sold.................      32,949,599     34,544,488     85,398,588   89,549,209    62,010,610     87,219,622
Proceeds from reinvestment
     of distributions.....................       1,647,533      3,349,483      8,752,065   15,976,338     5,765,539     10,632,390
Payments for shares redeemed..............     (29,352,639)  (38,551,043)   (92,779,753) (91,217,016)  (61,401,905)   (88,720,686)
                                               -----------   -----------    -----------  -----------   -----------    ----------- 
Net increase (decrease)
     in net assets from
     capital share transactions...........       5,244,493      (657,072)      1,370,900   14,308,531     6,374,244      9,131,326
                                                 ---------      --------       ---------   ----------     ---------      ---------

Net increase (decrease)
     in net assets........................       5,930,277    (1,016,438)      5,894,981   13,399,536    13,112,574     11,937,341

NET ASSETS
Beginning of period.......................     103,706,824    104,723,262    430,949,680  417,550,144   288,022,386    276,085,045
                                               -----------    -----------    -----------  -----------   -----------    -----------
End of period.............................    $109,637,101   $103,706,824   $436,844,661 $430,949,680  $301,134,960   $288,022,386
                                              ============   ============   ============ ============  ============   ============

TRANSACTIONS IN SHARES OF THE FUNDS
Sold .....................................       3,215,715      3,379,409      7,654,384    8,045,676    5,505,811       7,807,077
Issued in reinvestment
     of distributions.....................         160,820        327,171        784,611    1,435,175       510,811        951,174
Redeemed..................................      (2,865,208)    (3,766,840)    (8,311,990)  (8,207,114)   (5,449,012)    (7,947,182)
                                                ----------     ----------     ----------   ----------    ----------     ---------- 
Net increase (decrease)...................         511,327        (60,260)       127,005    1,273,737       567,610        811,069
                                                   =======        =======        =======    =========       =======        =======

See Notes to Financial Statements
</TABLE>

32   Statements of Changes in Net Assets            American Century Investments


                         NOTES TO FINANCIAL STATEMENTS

FEBRUARY 28, 1997 (UNAUDITED)

1. Organization and Summary of Significant Accounting Policies

Organization--American  Century  California  Tax-Free and  Municipal  Funds (the
Trust) is  registered  under the  Investment  Company Act of 1940 as an open-end
management investment company.  American Century-Benham  California Limited-Term
Tax-Free    Fund    (Limited-Term),     American    Century-Benham    California
Intermediate-Term Tax-Free Fund (Intermediate-Term), and American Century-Benham
California  Long-Term  Tax-Free Fund (Long-Term)  (collectively the "Funds") are
three of the seven funds composing the Trust. Each Fund is diversified under the
1940 Act.  The Funds seek to obtain as high a level of  interest  income  exempt
from  federal  and  California  income  taxes  as  is  consistent  with  prudent
investment  management and conservation of shareholders'  capital.  Limited-Term
invests  primarily in California  municipal  securities and maintains a weighted
average maturity of one to five years.  Intermediate-Term  invests  primarily in
California  municipal  securities and maintains a weighted  average  maturity of
five  to  ten  years.   Long-Term  invests  primarily  in  California  municipal
securities and maintains a weighted  average  maturity of ten or more years. The
Funds  concentrate  their  investments  in a single state and therefore may have
more exposure to credit risk related to the state of California than a fund with
a broader geographical  diversification.  The following  significant  accounting
policies,  related to the Funds,  are in  accordance  with  accounting  policies
generally accepted in the investment company industry.

Security  Valuations--Securities  are valued through valuations  obtained from 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.

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

Investment Income--Interest income is recorded on the accrual basis and includes
amortization  of discounts and premiums.  Premium and original issue discount is
amortized  daily using the effective  interest rate method.  Market  discount is
recognized as income upon the sale or maturity of the security.

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

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

At August  31,  1996,  accumulated  net  realized  capital  loss  carryovers  of
$1,151,341  for  Limited-Term  (expiring  2003 and  2004)  may be used to offset
future taxable 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  are due to differences in the
recognition  of  income  and  expense  items  for  financial  statement  and tax
purposes.

Futures  Contracts--Each  Fund may buy and sell interest rate futures  contracts
relating to debt securities.  Each Fund may use futures transactions to maintain
cash reserves while remaining fully invested,  to facilitate  trading, to reduce
transaction  costs,  or to  pursue  higher  investment  returns  when a  futures
contract is priced more attractively than its underlying  security or index. One
of the risks of entering  into  futures may  include  the  possibility  that the
change in value of the contract may not  correlate  with the changes in value of
the underlying  securities.  Upon entering into a futures contract,  the Fund is
required to deposit  either cash or  securities  in an amount equal to a certain
percentage  of  the  contract  value  (initial  margin).   Subsequent   payments
(variation  margin)  are made or  received  daily,  in cash,  by the  Fund.  The
variation  margin is equal to the  daily  change  in the  contract  value and is
recorded as unrealized gains and losses.  The Fund recognizes a realized gain or
loss when the contract is closed or expires.

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

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

Semiannual Report                          Notes to Financial Statements      33

                         NOTES TO FINANCIAL STATEMENTS

FEBRUARY 28, 1997 (UNAUDITED)
- --------------------------------------------------------------------------------
2. Transactions with Related Parties

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

          0.50% of the first $100 million 
          0.45% of the next $100 million 
          0.40% of the next $100 million  
          0.35% of the next $100 million 
          0.30% of the next $100 million  
          0.25% of the next $1 billion 
          0.24% of the next $1 billion
          0.23% of the next $1 billion  
          0.22% of the next $1 billion 
          0.21% of the next $1 billion 
          0.20% of the next $1 billion
          0.19% of the average daily net assets over $6.5 billion

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

The Trust has an additional agreement with BMC pursuant to which BMC established
a contractual  expense guarantee that limits Fund expenses (excluding items such
as brokerage  commissions,  taxes,  interest,  custodian  earnings credits,  and
extraordinary  expenses)  to 0.59% of average  daily  closing  net  assets.  The
agreement provides that BMC may recover amounts (representing expenses in excess
of the Fund's expense  guarantee  rate) absorbed during the preceding 11 months,
if, and to the extent that,  for any given month,  the Fund's  expenses are less
than the expense  guarantee rate in effect at that time.  The expense  guarantee
rate is subject to renewal in June 1997.

The  payables  to  affiliates  as of  February  28,  1997,  based  on the  above
agreements were as follows:

                              Limited-Term     Intermediate-       Long-Term
                                  Term
Investment Advisor ...........   $24,080         $  97,463         $  66,566
Administrative Services
and Transfer Agent ...........    14,738            55,588            37,749
                                 -------          --------          --------
                                 $38,818          $153,051          $104,315
                                 =======          ========          ========

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

- --------------------------------------------------------------------------------
3. Investment Transactions

The  aggregate  cost  of  municipal  debt  obligations   (excluding   short-term
investments)   purchased  for  the  six  months  ended  February  28,  1997,  in
Limited-Term, Intermediate-Term, and Long-Term totaled $24,578,777, $68,640,849,
and  $77,664,484,   respectively.   Proceeds  from  municipal  debt  obligations
(excluding short-term investments) sold in Limited-Term,  Intermediate-Term, and
Long-Term totaled $15,066,589, $67,481,625, and $75,573,941, respectively.

As of  February  28,  1997,  accumulated  net  unrealized  appreciation  of  the
Limited-Term,   Intermediate-Term   and   Long-Term   Funds   were   $1,293,514,
$16,745,212,   and  $13,967,631,   consisting  of  unrealized   appreciation  of
$1,317,199, $16,801,961, and $14,512,005 and unrealized depreciation of $23,685,
$56,749,  and $544,374,  respectively.  The aggregate  cost of  investments  for
federal  income tax  purposes was the same as the cost for  financial  reporting
purposes.


35   Notes to Financial Statements                  American Century Investments


                         NOTES TO FINANCIAL STATEMENTS

FEBRUARY 28, 1997 (UNAUDITED)
- --------------------------------------------------------------------------------
4. Corporate Events
<TABLE>

The following name changes became effective January 1, 1997:

                           NEW NAMES                                   FORMER NAMES

<S>                       <C>                                         <C>
Funds' Issuer:             American Century California                 Benham California Tax-Free and Municipal Trust
                           Tax-Free and Municipal Funds

Funds:                     American Century-Benham                     Benham California Tax-Free Limited-Term Fund
                           California Limited-Term Tax-Free Fund

                           American Century-Benham                     Benham California Tax-Free Intermediate-Term Fund
                           California Intermediate-Term Tax-Free Fund

                           American Century-Benham                     Benham California Tax-Free Long-Term Fund
                           California Long-Term Tax-Free Fund

Parent Company:            American Century Companies, Inc.            Twentieth Century Companies, Inc.

Distributor:               American Century Investment Services, Inc.  Twentieth Century Securities, Inc.

Transfer Agent:            American Century Services Corporation       Twentieth Century Services, Inc.
</TABLE>


Semiannual Report                             Notes to Financial Statements   35

<TABLE>
<CAPTION>

                              FINANCIAL HIGHLIGHTS
                        CALIFORNIA LIMITED-TERM TAX-FREE

For a Share Outstanding Throughout the Years Ended August 31 (except as noted)


                                                       1997(1)         1996         1995         1994          1993      1992(2)

PER-SHARE DATA
Net Asset Value,
<S>                                                     <C>          <C>          <C>          <C>           <C>          <C>   
Beginning of Period................................     $10.19       $10.23       $10.12       $10.34        $10.12       $10.00
                                                        ------       ------       ------       ------        ------       ------
Income from Investment Operations
   Net Investment Income...........................       0.21         0.43         0.41         0.38          0.38         0.10
   Net Realized and Unrealized Gain (Loss)
     on Investment Transactions....................       0.07        (0.04)        0.11        (0.18)         0.22         0.12
                                                          ----        -----         ----        -----          ----         ----
   Total From
     Investment Operations.........................       0.28         0.39         0.52         0.20          0.60         0.22
                                                          ----         ----         ----         ----          ----         ----
Distributions
   From Net Investment Income......................      (0.21)       (0.43)       (0.41)       (0.38)        (0.38)       (0.10)
   In Excess of Net Realized Gains.................         --           --           --        (0.04)           --           --
                                                          ----         ----         ----         ----          ----         ----

   Total Distributions.............................      (0.21)       (0.43)       (0.41)       (0.42)        (0.38)       (0.10)
                                                         -----        -----        -----        -----         -----        ----- 
Net Asset Value, End of Period.....................     $10.26       $10.19       $10.23       $10.12        $10.34       $10.12
                                                        ======       ======       ======       ======        ======       ======
   Total Return (3)................................       2.82%        3.87%        5.33%        1.90%         6.15%        1.47%

RATIOS/SUPPLEMENTAL DATA
   Ratio of Operating Expenses
     to Average Net Assets ........................     0.49% (4)     0.49%        0.51%        0.51%         0.36%           --
   Ratio of Net Investment Income
     to Average Net Assets.........................     4.21% (4)     4.20%        4.10%        3.68%         3.76%     4.08%(4)
   Portfolio Turnover Rate.........................        14%          44%          50%          66%           54%          19%
   Net Assets, End
     of Period (in thousands)......................   $109,637     $103,707     $104,723     $120,727      $114,019      $52,171

(1)  Six months ended February 28,1997 (unaudited).

(2)  June 1, 1992 (Inception) through August 31, 1992.

(3)  Total  return   assumes   reinvestment   of  dividends  and  capital  gains
     distributions, if any. Total returns for periods less than one year are not
     annualized.

(4)  Annualized.

See Notes to Financial Statements
</TABLE>


36   Financial Highlights                      American Century Investments

<TABLE>
<CAPTION>

                              FINANCIAL HIGHLIGHTS
                      CALIFORNIA INTERMEDIATE-TERM TAX-FREE

For a Share Outstanding Throughout the Years Ended August 31 (except as noted)


                                                       1997(1)         1996         1995         1994          1993         1992

PER-SHARE DATA
Net Asset Value,
<S>                                                     <C>          <C>          <C>          <C>           <C>          <C>   
Beginning of Period................................     $11.05       $11.06       $10.86       $11.36        $10.85       $10.49
                                                        ------       ------       ------       ------        ------       ------
Income from Investment Operations
   Net Investment Income ..........................       0.27         0.54         0.54         0.54          0.56         0.59
   Net Realized and Unrealized Gain (Loss)
     on Investment Transactions....................       0.14        (0.01)        0.20        (0.41)         0.53         0.36
                                                          ----        -----         ----        -----          ----         ----
   Total From
     Investment Operations.........................       0.41         0.53         0.74         0.13          1.09         0.95
                                                          ----         ----         ----         ----          ----         ----
Distributions
   From Net
     Investment Income.............................      (0.27)       (0.54)       (0.54)       (0.54)        (0.56)       (0.59)
   From Net Realized Gains on
     Investment Transactions.......................      (0.03)          --           --        (0.08)        (0.02)          --
   In Excess of Net Realized Gains.................         --           --           --        (0.01)           --           --
                                                          ----         ----         ----         ----          ----         ----

   Total Distributions.............................      (0.30)       (0.54)       (0.54)       (0.63)        (0.58)       (0.59)
                                                         -----        -----        -----        -----         -----        ----- 
Net Asset Value, End of Period.....................     $11.16       $11.05       $11.06       $10.86        $11.36       $10.85
                                                        ======       ======       ======       ======        ======       ======
   Total Return (2)................................       3.81%        4.79%        7.09%        1.11%        10.42%        9.18%

RATIOS/SUPPLEMENTAL DATA
   Ratio of Operating Expenses
     to Average Net Assets ........................  0.47% (3)        0.48%        0.48%        0.48%         0.50%        0.52%
   Ratio of Net Investment Income
     to Average Net Assets.........................  4.83% (3)        4.87%        5.02%        4.82%         5.05%        5.50%
   Portfolio Turnover Rate.........................        16%          36%          25%          44%           27%          49%
   Net Assets, End
     of Period (in thousands)......................   $436,845     $430,950     $417,550     $448,293      $444,460     $304,988

(1)  Six months ended February 28, 1997 (unaudited).

(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
</TABLE>


Semiannual Report                                      Financial Highlights   37
<TABLE>
<CAPTION>


                              FINANCIAL HIGHLIGHTS
                          CALIFORNIA LONG-TERM TAX-FREE

For a Share Outstanding Throughout the Years Ended August 31 (except as noted)


                                                       1997(1)         1996         1995         1994          1993         1992

PER-SHARE DATA
Net Asset Value,
<S>                                                     <C>          <C>          <C>          <C>           <C>          <C>   
Beginning of Period................................     $11.06       $10.94       $10.88       $12.02        $11.44       $11.00
                                                        ------       ------       ------       ------        ------       ------
Income from Investment Operations
   Net Investment Income...........................       0.30         0.61         0.62         0.63          0.66         0.69
   Net Realized and Unrealized Gain (Loss)
     on Investment Transactions....................       0.27         0.12         0.12        (0.71)         0.85         0.44
                                                          ----         ----         ----        -----          ----         ----
   Total From
     Investment Operations.........................       0.57         0.73         0.74        (0.08)         1.51         1.13
                                                          ----         ----         ----        -----          ----         ----
Distributions
   From Net
     Investment Income.............................      (0.30)       (0.61)       (0.62)       (0.63)        (0.66)       (0.69)
   From Net Realized Gains
     on Investment Transactions....................      (0.02)          --        (0.06)       (0.43)        (0.27)          --
                                                          ----         ----         ----         ----          ----         ----

   Total Distributions.............................      (0.32)       (0.61)       (0.68)       (1.06)        (0.93)       (0.69)
                                                         -----        -----        -----        -----         -----        ----- 
Net Asset Value, End of Period.....................     $11.31       $11.06       $10.94       $10.88        $12.02       $11.44
                                                        ======       ======       ======       ======        ======       ======
   Total Return (2)................................       5.19%        6.77%        7.21%       (.78)%        14.02%       10.58%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets..............................  0.47% (3)        0.48%        0.49%        0.48%         0.49%        0.52%
Ratio of Net Investment Income
to Average Net Assets..............................  5.43% (3)        5.48%        5.84%        5.51%         5.76%        6.14%
Portfolio Turnover Rate............................        26%          42%          60%          62%           55%          72%
Net Assets, End
of Period (in thousands)...........................   $301,135     $288,022     $276,085     $277,477      $338,075     $275,880


(1)  Six months ended February 28, 1997 (unaudited).

(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
</TABLE>

38   Financial Highlights                           American Century Investments


                                     NOTES

Semiannual Report                                                     Notes   39


                             BACKGROUND INFORMATION

Investment Philosophy and Policies

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

California  Limited-Term  Tax-Free is a variable-priced  bond fund that seeks to
obtain as high a level of interest  income  exempt from  federal and  California
income  taxes  as  is  consistent   with  prudent   investment   management  and
conservation of shareholders' capital.

California  Intermediate-Term Tax-Free is a variable-priced bond fund that seeks
to obtain as high a level of interest  income exempt from federal and California
income  taxes  as  is  consistent   with  prudent   investment   management  and
conservation of shareholders' capital.

California  Long-Term  Tax-Free  is a  variable-priced  bond fund that  seeks to
obtain as high a level of interest  income  exempt from  federal and  California
income  taxes  as  is  consistent   with  prudent   investment   management  and
conservation of shareholders' capital.

Comparative Indices

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

The Lehman Brothers  3-Year  Municipal Bond Index is composed of more than 4,000
municipal  bonds with  maturities of 2 to 4 years.  The average credit rating of
the securities in the index is AA1/AA2.  The average  maturity of the index is 3
years.

The Lehman  Brothers  5-Year General  Obligation  Index is composed of more than
5,000 municipal bonds with maturities of 4 to 6 years. The average credit rating
of the securities in the index is AA1/AA2.  The average maturity of the index is
approximately 5 years.

The Lehman  Brothers  Long-Term  Municipal  Bond Index is  composed of more than
2,700 municipal bonds with maturities  greater than 22 years. The average credit
rating of the  securities in the index is AA2/AA3.  The average  maturity of the
index is approximately 27 years.

Lipper Rankings

Lipper Analytical  Services,  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 California Tax-Free Bond Funds are:

California     Short-Intermediate    Municipal    Debt    Funds    (Limited-Term
Tax-Free)--funds  that  invest at least 65% of assets in  municipal  debt issues
that are  exempt  from  taxation  in  California  with  dollar-weighted  average
maturities of 1 to 5 years.

California Intermediate Municipal Debt Funds (Intermediate-Term Tax-Free)--funds
that invest at least 65% of assets in municipal debt issues that are exempt from
taxation in California with dollar-weighted average maturities of 5 to 10 years.

California Municipal Debt Funds (Long-Term Tax-Free)--funds that invest at least
65% of  assets in  municipal  debt  issues  that are  exempt  from  taxation  in
California.

PORTFOLIO MANAGEMENT TEAM

Vice President and
Senior Municipal Portfolio Manager        Dave MacEwen

Senior Municipal Portfolio Manager        Colleen Denzler

Municipal Portfolio Manager               Joel Silva

Senior Municipal Portfolio Manager
and Manager of Municipal
Credit Analysis                           Steven Permut

Credit Analysts                           Scott Lord, David Moore,
                                          Bill McClintock, Tim Benham


40   Background Information                         American Century Investments


                                    GLOSSARY

Returns

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

o    Average Annual  Returns  illustrate  the annually  compounded  returns that
     would have  produced  the  fund's  cumulative  total  returns if the fund's
     performance  had been  constant  over the  entire  period.  Average  annual
     returns smooth out variations in a fund's return;  they are not the same as
     fiscal year-by-year results. For fiscal year-by-year returns,  please refer
     to the "Financial Highlights" on pages 36, 37 and 38. 

Yields

o    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.

o    Tax-Equivalent  Yields show the taxable yields that investors in a combined
     California  and federal  income tax bracket would have to earn before taxes
     to equal the fund's tax-free yield. 

Bond Portfolio Structures

o    Barbell  Structure--a  structure that overweights a portfolio in short- and
     long-term securities and underweights  intermediate-term  securities.  This
     structure  tends to perform best when  short-term  rates are rising  faster
     than long-term rates, or long-term rates are falling faster than short-term
     rates.

o    Ladder  Structure--a  balanced  structure that staggers bond  maturities so
     they occur at regular intervals.  This structure tends to perform best when
     interest rates are relatively stable.

Investment Terms

o    Basis Point--one one-hundredth of a percentage point (or 0.01%).

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

Statistical Terminology

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

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

o    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.

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

Types of Municipal Securities

o    COPs (Certificates of  Participation)/Leases--securities  issued to finance
     public property  improvements  (such as city halls and police stations) and
     equipment purchases. Certificates of participation represent long-term debt
     obligations,  but leases have a higher risk  profile  because  they require
     annual appropriation.

o    GO Bonds--general  obligation  securities backed by the taxing power of the
     issuer.

o    Land-Secured  Bonds--securities such as Mello-Roos bonds and 1915 Act bonds
     that are issued to finance real estate development projects.

o    Prerefunded/ETM Bonds--securities refinanced or escrowed to maturity by the
     issuer  because  of  their  premium  coupons  (higher-than-market  interest
     rates).  These bonds tend to have higher  credit  ratings  because they are
     backed by Treasury securities.

o    Revenue  Bonds--securities  backed by  revenues  from sales taxes or from a
     specific project, system or facility (such as a hospital,  electric utility
     or water system).

Semiannual Report                                                  Glossary   41


[american century logo]
American
Century(sm)


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

Person-to-Person Assistance:
1-800-345-2021 or 816-531-5575

Automated Information Line:
1-800-345-8765

Telecommunications Device for the Deaf:
1-800-634-4113 or 816-753-1865

Fax: 816-340-7962

Internet: www.americancentury.com

American Century California Tax-Free & 
Municipal Funds

Investment Manager
Benham Management Corporation


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

American Century Investment Services, Inc.


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