AMERICAN CENTURY CALIFORNIA TAX FREE & MUNICIPAL FUNDS
N-30D, 1998-10-29
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[front cover]                                                    August 31, 1998

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

   [graphic of stairs]

BENHAM GROUP
- -----------------------
CALIFORNIA TAX-FREE MONEY MARKET
CALIFORNIA MUNICIPAL MONEY MARKET

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


A Note from the Founder
- --------------------------------------------------------------------------------

     On our 40th  anniversary,  I would  personally  like to express my profound
appreciation  for the  confidence  you have shown in  American  Century.  We are
grateful for the opportunity to manage your money,  and we will do our utmost to
continue to meet your expectations and justify your confidence in us.

     I  founded  American  Century  on  the  belief  that  if we  can  make  you
successful,  you, in turn,  will make us successful.  That is the principle that
will guide us in the future.

     Sincerely,
     /s/James E. Stowers


About our New Report Design
- --------------------------------------------------------------------------------

Why We Changed

We're trying hard to be reader-friendly.  Our reports contain a lot of very good
information, from fund statistics and financials to Q&A's with fund managers. We
hope the new design will make the reports more  interesting  and  understandable
while helping you keep abreast of your fund's strategy and performance.

What's New

The reports are designed to be attractive and easy to use whether you're reading
them in depth or just skimming.

     New features include:

* Larger type size in many sections.
* Brief explanations of the financial statements.
* More prominent graphs and charts.
* Quotes in the margins to highlight report content.

THE BOTTOM LINE.

The new design  actually  costs  slightly less than the old one. We  reallocated
costs and eliminated a cover letter and the envelope that  previously  came with
your  report  enclosed.  This not only saves  money,  but  reduces the number of
mailing pieces you receive.

The new  reports  also use  roughly  the same  amount  of paper as the old ones.
Previously,  paper was trimmed  and thrown  away to produce  the smaller  report
size.

We believe we've come up with a more interesting,  informative and user-friendly
publication.

We hope you enjoy it.

[left margin]

Benham Group
California Tax-Free Money Market
(BCTXX)
California Municipal Money Market
(BNCXX)

[40 Years logo]
Four Decades of Serving Investors
40 Years
American Century
1958-1998


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

     The Benham  California money market funds reaffirmed their value during the
year ended  August 31,  1998,  when global  economic  and  financial  conditions
worsened.  Stock markets worldwide suffered sharp declines, while bonds produced
positive   returns  and  money  market   funds   provided  a  stable  place  for
shareholders' money.

     The current market environment  illustrates the importance of a diversified
investment  portfolio.  Diversifying your assets among stocks,  bonds, and money
market  funds  can help  weatherproof  your  portfolio  against  changes  in the
economic or investment climate.

     Within this  environment,  the Benham  California  money funds continued to
perform well.  Both funds  provided  returns that exceeded  those of the average
California tax-free money market fund.

     In one respect, money market funds were affected by the market turmoil. The
volume of money pouring into money market  securities drove down yields.  At the
same time,  the threat of global  economic  weakness  caused  interest  rates to
decline.  On September 29, 1998,  the Federal  Reserve  acknowledged  the global
slowdown and cut its bellwether  federal funds rate for the first time in almost
three years. As a result,  short-term yields fell,  affecting money market funds
and other cash  instruments  such as Treasury bills and certificates of deposit.
Money market fund yields will likely trend  downward in the coming  months,  but
they should still keep pace with or remain ahead of inflation because the threat
of an economic downturn is likely to hold inflation in check.

     On the corporate  front,  we have been  expanding our new American  Century
Brokerage. Our brokerage operation offers a wide range of investment options and
features,  including  individual  securities,  a wide array of mutual funds from
other companies, a Gold MasterCard ATM/debit card, unlimited  checkwriting,  and
24-hour   telephone   and   Internet   access.   Call  our   Investor   Services
representatives or visit our Internet site for more details.

     We also have a huge effort underway to prepare American  Century's computer
systems for the year 2000 (Y2K). Our team of technology professionals is working
to address  Y2K-related  issues.  Through the rest of 1998 and  1999,we  will be
testing our systems,  including those involved with dividend payments, to verify
the accuracy of dividend calculations and distributions.

     Finally,  we hope you like the new design of this report.  It's intended to
make the important information you need about your fund easier to find and read

Sincerely,

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


[right margin]

                Table of Contents
   Report Highlights ........................................................  2
   Services Update ..........................................................  3
CALIFORNIA TAX-FREE MONEY MARKET
   Performance Information ..................................................  4
   Management Q&A ...........................................................  5
   Portfolio Composition
   by Security Type .........................................................  5
   Portfolio Composition
   by Credit Rating .........................................................  6
   Schedule of Investments ..................................................  7
CALIFORNIA MUNICIPAL MONEY MARKET
   Performance Information .................................................. 11
   Management Q&A ........................................................... 12
   Portfolio Composition
   by Security Type ......................................................... 12
   Portfolio Composition
   by Credit Rating ......................................................... 13
   Schedule of Investments .................................................. 14
FINANCIAL STATEMENTS
   Statements of Assets and
   Liabilities .............................................................. 18
   Statements of Operations ................................................. 19
   Statements of Changes
   in Net Assets ............................................................ 20
   Notes to Financial
   Statements ............................................................... 21
   Financial Highlights ..................................................... 23
   Report of Independent
   Accountants .............................................................. 25
OTHER INFORMATION
   Background Information
      Investment Philosophy
      and Policies .......................................................... 26
      Lipper Rankings ....................................................... 26
      Credit Rating
      Guidelines ............................................................ 26
      Investment Team
      Leaders ............................................................... 26
   Glossary ................................................................. 27


                                                  www.americancentury.com      1


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

TAX-FREE MONEY MARKET

*   California Tax-Free Money Market performed well, providing shareholders with
    more state and federal  tax-free  income than the average  California  money
    market fund.

*   We've been able to deliver attractive  relative  performance  without taking
    significant  credit risk. In the last year, we eliminated  securities backed
    by Japanese banks from the portfolio because of their potential risks.

*   One  of the  primary  factors  contributing  to  the  portfolio's  continued
    outperformance is its lower-than-average  management expenses.  Other things
    being  equal,  lower  expenses  mean  higher  yields  and  returns  for  our
    shareholders.

*   We extended the average  maturity in May,  when  short-term  interest  rates
    peaked.  That allowed us to lock in higher yields before rates began to come
    down in June.

*   Although we don't anticipate a recession, we believe California's economy is
    likely to slow down.  That should lead to lower  interest rates for tax-free
    money market securities.

*   We're  likely  to  extend  the  average  maturity  if  we're  able  to  find
    longer-term securities with attractive yields.

MUNICIPAL MONEY MARKET

*   California  Municipal Money Market  performed well,  providing  shareholders
    with more state and federal  tax-free  income  than the  average  California
    money market fund.

*   We've been able to deliver attractive  relative  performance  without taking
    significant  credit risk. In the last year, we eliminated  securities backed
    by Japanese banks from the portfolio because of their potential risks.

*   One reason for California Municipal Money Market's better-than-average yield
    is that we  increased  our  holdings  of  securities  subject to the federal
    alternative minimum tax (AMT). AMT securities  typically offer higher yields
    than non-AMT paper.

*   Another  important  contributor  to the  portfolio's  outperformance  is its
    lower-than-average  management  expenses.  Other things  being equal,  lower
    expenses mean higher yields and returns for our shareholders.

*   We extended the average  maturity in May,  when  short-term  interest  rates
    peaked.  That allowed us to lock in higher yields before rates began to come
    down in June.

*   Although we don't anticipate a recession, we believe California's economy is
    likely to slow down.  That should lead to lower  interest rates for tax-free
    money market securities.

*   We're  likely  to  extend  the  average  maturity  if  we're  able  to  find
    longer-term securities with attractive yields.


[left margin]

              CALIFORNIA TAX-FREE
                 MONEY MARKET
                    (BCTXX)

TOTAL RETURNS:               AS OF 8/31/98
    6 Months                        1.53%*
    1 Year                           3.12%
NET ASSETS:                 $456.0 million
7-DAY CURRENT YIELD:                 2.68%
INCEPTION DATE:                    11/9/83

             CALIFORNIA MUNICIPAL
                MONEY MARKET
                   (BNCXX)

TOTAL RETURNS:               AS OF 8/31/98
    6 Months                        1.58%*
    1 Year                           3.20%
NET ASSETS:                 $172.6 million
7-DAY CURRENT YIELD:                 2.86%
INCEPTION DATE:                   12/31/90

* Not annualized.

See  Total  Returns  on pages 4 and 11.  Investment  terms  are  defined  in the
Glossary on page 27.


2       1-800-345-2021


Services Update
- --------------------------------------------------------------------------------

     We get many questions from money market investors about our services.  Here
are answers to several frequently asked questions.

CAN I MAKE DIRECT DEPOSITS INTO MY MONEY MARKET FUND?

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

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

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

IS THERE AN EASY WAY TO MOVE MONEY FROM MY MONEY  MARKET  ACCOUNT  INTO MY STOCK
AND BOND FUND ACCOUNTS ON A REGULAR BASIS, FOR DOLLAR-COST-AVERAGING PURPOSES?

     Yes. Our "Automatic  Exchange" plan allows  regularly  scheduled  automatic
transfers  from  your  American  Century  money  market  fund  into  any of your
variable-price  American  Century stock or bond funds.  You can arrange for this
service with a phone call.

IS THERE A LIMIT TO THE NUMBER OF  EXCHANGES  I CAN MAKE OUT OF MY MONEY  MARKET
FUND?

     If you are  exchanging  from your money market fund into your bond or stock
fund, there is no limit. However, there is a limit of six exchanges per calendar
year out of your bond and stock funds.

     Exchanges can be made by:

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

     * calling our Automated Information Line at 1-800-345-8765*

     * writing us a letter

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

IS THERE A FEE FOR WRITING CHECKS AGAINST MY MONEY MARKET FUND?

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

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

[right margin]

ACCESSING YOUR MONEY. . .

WE CAN SEND A CHECK  DIRECTLY TO YOU AT YOUR ADDRESS OF RECORD.  ALL YOU NEED TO
DO IS GIVE US A CALL OR WRITE US A LETTER REQUESTING THE CHECK. WE CAN ALSO MAKE
AUTOMATIC DEPOSITS FROM YOUR MONEY MARKET FUND TO YOUR BANK ACCOUNT.

* Requires shareholder authorization.


                                                www.americancentury.com        3


California Tax-Free Money Market--Performance
- --------------------------------------------------------------------------------

TOTAL RETURNS AS OF AUGUST 31, 1998
                                             INCEPTION 11/9/83
                                                    CALIFORNIA TAX-EXEMPT
                      CALIFORNIA TAX-FREE           MONEY MARKET FUNDS(2)
                         MONEY MARKET         AVERAGE RETURN     FUND'S RANKING
- --------------------------------------------------------------------------------
6 MONTHS(1) ..............  1.53%                 1.41%                --
1 YEAR ...................  3.12%                 2.90%            9 OUT OF 55
- --------------------------------------------------------------------------------
AVERAGE ANNUAL RETURNS
3 YEARS ..................  3.14%                 2.94%           11 OUT OF 49
5 YEARS ..................  2.96%                 2.85%           13 OUT OF 43
10 YEARS .................  3.50%                 3.49%            7 OUT OF 18

(1)  Returns for periods less than one year are not annualized.
(2)  According to Lipper Analytical Services, an independent mutual fund
     ranking service.

See pages 26-27 for more information about returns and Lipper fund rankings.


PORTFOLIO AT A GLANCE
                                8/31/98     8/31/97
NUMBER OF SECURITIES              91          86
WEIGHTED AVERAGE
MATURITY                        34 DAYS     36 DAYS
EXPENSE RATIO                    0.50%       0.49%


YIELDS AS OF AUGUST 31, 1998

7-DAY CURRENT YIELD              2.68%

7-DAY EFFECTIVE YIELD            2.72%

7-DAY TAX-EQUIVALENT YIELDS
34.70% TAX BRACKET               4.10%
37.42% TAX BRACKET               4.28%
41.95% TAX BRACKET               4.62%
45.22% TAX BRACKET               4.89%

Past performance does not guarantee future results.

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

Yields will fluctuate, and although the fund seeks to preserve the value of your
investment  at $1 per share,  it is possible to lose money by  investing  in the
fund.


4      1-800-345-2021


California Tax-Free Money Market--Q&A
- --------------------------------------------------------------------------------

     An  interview  with Todd  Pardula,  a portfolio  manager on the  California
Tax-Free Money Market fund investment team.

HOW DID CALIFORNIA TAX-FREE MONEY MARKET PERFORM DURING THE FISCAL YEAR?

     We continued to outperform  the average  California  money market fund. For
the fiscal year ended  August 31,  1998,  the fund had a total  return of 3.12%,
compared with the 2.90% average  return of the 55  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.)

HOW DID CALIFORNIA  TAX-FREE MONEY MARKET'S YIELD COMPARE WITH OTHER  CALIFORNIA
MONEY FUNDS' YIELDS?

     The  portfolio  continued to produce a  relatively  high level of state and
federal  tax-exempt  income.  On August 31, 1998,  its 7-day  current  yield was
2.68%,  compared with the 2.42% yield of the average  California  tax-free money
fund, according to IBC's Money Fund Report.

WHY DID THE FUND OUTPERFORM?

     The primary  reason is that the  California  Tax-Free Money Market fund has
lower-than-average  expenses.  Lower expenses mean higher yields and returns for
shareholders.

     Another  key  factor  behind the  outperformance  is that we made some very
timely decisions  regarding the fund's maturity.  For example, in early January,
the  portfolio's  maturity  was a little  shorter  than  many  other  California
tax-exempt  money  market  funds.  That  turned  out  to  be an  advantage  when
short-term  interest rates rose in response to a strong U.S. economy.  A shorter
maturity is advantageous when interest rates rise because maturing assets can be
reinvested more rapidly at higher rates.

     We  lengthened  the  average  maturity  in  May--when   short-term   yields
peaked--by acquiring a large amount of higher-yielding one-year securities. As a
result,  the  average  maturity  jumped  from 29 to 48 days at a time  when  the
average  California  money fund had a maturity of 38 days.  Typically,  we would
purchase one-year  securities in June and July, when California note issuance is
plentiful. But buying in May meant we were able to lock in yields at 20-30 basis
points (a basis  point  equals  0.01%) more than we would have earned in June or
July.

WHAT EXTERNAL FACTORS AFFECTED THE FUND?

     California's  strong  economy  increased  tax  revenues,  which reduced the
borrowing needs of local  municipalities  and lowered the level of new municipal
debt issuance.  Plus, with long-term  interest rates so low, most issuers prefer
to borrow long term, further reducing the supply of short-term securities.  With
supply limited, prices on short-term securities rose and yields fell.

HAS THE  ECONOMIC  MELTDOWN  IN ASIA HAD AN EFFECT ON THE  CALIFORNIA  MUNICIPAL
MARKET?

     So far,  the Asian  economic  crisis  has not  significantly  dampened  the
California  economy.  But Asia is a major trading partner,  so we expect trouble
there will eventually weigh on California.  However,  the crisis has had a major
impact on Japanese  banks,  many of which  provide  letters of credit (LOCs) for
California tax-exempt money market securities.  These banks, which already faced
major credit problems because of deflated Japanese real estate values, are major
lenders to companies in Southeast Asia.

[right margin]

"WE CONTINUED TO OUTPERFORM THE AVERAGE CALIFORNIA MONEY MARKET FUND."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF AUGUST 31, 1998
Variable-Rate Notes         78%
Put Bonds                    9%
Municipal Notes              6%
Commercial Paper             4%
Bonds less than 1 Year       3%

AS OF FEBRUARY 28, 1998
Variable-Rate Notes         71%
Municipal Notes             13%
Put Bonds                    5%
Commercial Paper             7%
Bonds less than 1 Year       4%

Security types are defined on page 27.


                                                  www.americancentury.com      5


California Tax-Free Money Market--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

DOES CALIFORNIA TAX-FREE MONEY MARKET HAVE ANY EXPOSURE TO JAPANESE BANKS?

     No. We were one of the first mutual fund  companies  to eliminate  Japanese
bank LOCs, instead  purchasing  securities backed by North American and European
LOC providers.

     Our universe of approved  LOC  providers  is under  constant  review by our
credit team.  For  instance,  we removed  Bankers  Trust from our approved  list
because  of its  exposure  to  emerging  markets.  That  means  we will  not buy
tax-exempt money market  securities  backed by Bankers Trust,  regardless of the
financial strength of the security's issuer.

     In  general,  our credit  team  leans  toward  the  conservative  side when
evaluating money market instruments and the banks that back them. So even though
Japanese-backed  securities  yield as much as 100 basis  points  more than other
instruments,  we don't believe it's in our shareholders'  best interests to take
on the added credit risk to reach for additional yield.

BUT THE FUND'S CREDIT QUALITY DID CHANGE DURING THE FISCAL YEAR (SEE THE TABLE
AT LEFT). WHY?

     As of August 31, 1998, 89% of the portfolio was rated SP1+ or SP1, Standard
& Poor's  Corporation's  two highest  credit  ratings for  short-term  municipal
securities. Our 11% SP2 exposure applies primarily to securities backed by Union
Bank of California,  which is owned by Bank of Tokyo Mitsubishi. We believe that
Union Bank of California,  which was downgraded along with Bank of Tokyo earlier
this year, is a stronger credit than the S&P rating reflects. That's because the
bank's  operations  are  primarily  limited to the state of  California  and are
subject to U.S. banking regulations.

WHAT IS YOUR OUTLOOK?

     Although we don't see a recession,  we believe that the California  economy
is likely to slow down. A slowing economy exerts  downward  pressure on interest
rates,  which  means that money  market  yields of all types are likely to fall.
However,  because yields on longer-term  tax-exempt money market  securities are
relatively  unattractive  right now, we have little  interest in  extending  the
fund's  maturity  at  this  time.  We  will  likely  continue  our  emphasis  on
variable-rate  notes (also known as "floaters"),  whose rates reset either daily
or weekly.  But we'll likely  extend the average  maturity if yields become more
attractive.

[left margin]

"WE WERE ONE OF THE FIRST MUTUAL FUND COMPANIES TO ELIMINATE SECURITIES BACKED
BY JAPANESE BANKS."

PORTFOLIO COMPOSITION BY CREDIT RATING
                      % OF FUND INVESTMENTS
                     AS OF            AS OF
                    8/31/98          2/28/98
SP1+                  73%              81%
SP1                   16%              19%
SP2                   11%              --


Ratings provided by Standard & Poor's.  See Credit Rating  Guidelines on page 26
for more information.

"ALTHOUGH WE DON'T SEE A RECESSION, WE BELIEVE CALIFORNIA'S ECONOMY IS LIKELY
TO SLOW DOWN."


6       1-800-345-2021


Tax-Free Money Market--Schedule of Investments
- --------------------------------------------------------------------------------

AUGUST 31, 1998

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

SHORT-TERM MUNICIPAL SECURITES
       $  4,000,000  ABN Amro Munitops Certificates
                        Trust Receipts, VRDN, 3.30%,
                        9/2/98 (FGIC) (SBBPA: ABN
                        Amro Bank N.V.) (Acquired
                        8/19/98, Cost $4,000,000)(1)          $    4,000,000
          7,325,000  Agoura Hills Multifamily Housing
                        Rev., (Oakridge Apartments), 
                        VRDN, 3.25%, 9/2/98 (LOC:
                        Continental Casualty Co.)                  7,325,000
          2,000,000  Association of Bay Area
                        Governments Financing Auth.
                        Rev. COP, (Bentley School),
                        VRDN, 2.95%, 9/2/98 (LOC:
                        Banque Nationale de Paris S.A.)            2,000,000
         10,800,000  Avalon Community Improvement
                        Agency  Tax  Allocation  Rev.,  
                        (Community   Improvement
                        Area), VRDN, 3.75%, 9/3/98 (LOC:
                        Union Bank of California, N.A.)           10,800,000
         10,615,000  Azusa Multifamily Housing Rev.,
                        (Pacific Glen Apartments),
                        VRDN, 3.10%, 9/3/98
                        (Guaranteed: Continental
                        Casualty Co.)                             10,615,000
          5,000,000  Bassett Unified School District
                        COP, (Capital Improvement), 
                        VRDN, 3.45%, 9/3/98 (LOC:
                        Union Bank of California, N.A.)            5,000,000
          1,508,000  California Department of Water
                        Commercial Paper, 3.65%,
                        9/15/98 (Line of Credit: UBS
                        AG and Canadian Imperial
                        Bank of Commerce)                          1,508,000
          4,400,000  California Educational Facilities
                        Auth. Rev., (Mount St. Marys
                        College), VRDN, 3.00%,
                        9/2/98 (LOC: Allied Irish
                        Banks, PLC)                                4,400,000
          1,500,000  California Educational Facilities
                        Auth. Rev., (University of
                        Southern California), 4.35%,
                        10/1/98                                    1,500,611
          2,640,000  California Educational Facilities
                        Auth. Rev., Series 1997 B,
                        (University of Southern
                        California), 4.125%, 10/1/98               2,640,525
          4,700,000  California Health Facilities Auth.
                        Rev., (Episcopal Home), VRDN,
                        3.65%, 9/1/98 (LOC: Union
                        Bank of California, N.A.)                  4,700,000
          6,000,000  California Health Facilities
                        Financing Auth. Rev., Series
                        1985 B, (Scripps Memorial
                        Hospital), VRDN, 2.50%,
                        9/3/98 (MBIA) (SBBPA:
                        Morgan Guaranty Trust Co. of
                        New York)                                  6,000,000

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

       $    900,000  California Health Facilities
                        Financing Auth. Rev., Series
                        1987 A, (Pooled Loan Program),
                        VRDN, 3.40%, 9/3/98 (LOC:
                        Rabobank Nederland)                  $       900,000
          2,200,000  California Health Facilities
                        Financing Auth. Rev., Series
                        1990 A, (Pooled Project),
                        VRDN, 2.40%, 9/2/98 (LOC:
                        Rabobank Nederland)                        2,200,000
          3,500,000  California Health Facilities
                        Financing Auth. Rev., Series
                        1995 C, (Catholic West), VRDN,
                        2.35%, 9/2/98 (MBIA)
                        (SBBPA: Rabobank Nederland)                3,500,000
         17,700,000  California Health Facilities
                        Financing Auth. Rev., Series
                        1996 B, VRDN, 3.15%,
                        9/1/98 (AMBAC) (SBBPA:
                        ABN Amro Bank N.V.)                       17,700,000
          3,290,000  California Housing Financing
                        Agency Rev., 3.60%, 4/8/99
                        (MBIA) (SBBPA: Credit Suisse
                        First Boston, Inc.) (Acquired
                        8/7/98, Cost $3,290,000)(1)                3,290,000
          1,000,000  California Pollution Control
                        Financing Auth. Rev., (Chevron
                        USA, Inc.), VRDN, 3.90%,
                        11/15/98 (Guaranteed:
                        Chevron Corp.)                             1,000,000
         10,500,000  California Pollution Control
                        Financing Auth. Rev., (Chevron
                        USA Inc.), VRDN, 3.65%,
                        5/15/99 (Guaranteed:
                        Chevron Corp.)                            10,500,000
          5,000,000  California Pollution Control
                        Financing Auth. Rev., Series
                        1996 C, (Pacific Gas &
                        Electric), VRDN, 3.20%,
                        9/1/98 (LOC: Bank of America
                        N.T. & S.A.)                               5,000,000
          5,000,000  California Public Capital
                        Improvements Financing Auth.
                        Rev., Series 1988 C, VRDN,
                        3.65%, 9/15/98 (LOC:
                        National Westminster Bank
                        PLC)                                       5,000,000
          1,620,000  California Public Works Board Lease
                        Rev., Series 1997 C, (University
                        of California), 4.50%, 9/1/98              1,620,000
          2,000,000  California Public Works Board
                        Lease Rev., Series 1998 A,
                        (Department of Corrections),
                        4.25%, 9/1/98                              2,000,000
         10,000,000  California School Cash Reserve
                        Program Auth. Rev., Series
                        1998 A, 4.50%, 7/2/99 (GIC:
                        Trinity Funding Corporation)              10,060,966

See Notes to Financial Statements


                                                 www.americancentury.com    7


Tax-Free Money Market--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                     (Continued)
AUGUST 31, 1998

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

        $ 3,750,000  California State Economic
                        Development Financing Auth.
                        Industrial Rev., (Coast Grain Co.),
                        VRDN, 2.50%, 9/3/98 (LOC:
                        Bank of America N.T. & S.A.)          $    3,750,000
          3,500,000  California State Economic
                        Development Financing Auth.
                        Rev., Series 1998 B, (California
                        Independent System), VRDN,
                        3.20%, 9/1/98 (LOC: Bank of
                        America N.T. & S.A.)                       3,500,000
          5,000,000  California Statewide Communities
                        Apartment Development Auth.
                        Rev., (Whispering Winds
                        Apartments), VRDN, 3.25%,
                        9/2/98 (LOC: Continental
                        Casualty Co.)                              5,000,000
          1,905,000  California Statewide Communities
                        Development Auth. Rev. COP,
                        4.25%, 4/1/99 (MBIA)                       1,909,235
         22,000,000  California Statewide Communities
                        Development Auth. Rev.,
                        Floating Rate Trust Receipts,
                        3.55%, 9/2/98 (FSA) (SBBPA:
                        Bank of New York)(2)                      22,000,000
          7,800,000  California Statewide COP,
                        (Covenant Retirement
                        Community), VRDN, 2.65%,
                        9/3/98 (LOC: LaSalle National
                        Bank)                                      7,800,000
          1,000,000  Calleguas-Las Virgines Public
                        Financing Auth. Installment
                        Purchase Rev., (Las Virgines
                        Municipal Water District), 4.00%,
                        11/1/98 (FSA)                              1,000,488
          2,305,000  Central Unified School District
                        COP, VRDN, 3.70%, 9/2/98
                        (LOC: Union Bank of California,
                        N.A.)                                      2,305,000
          2,700,000  Covina Redevelopment Agency 
                        Multifamily Housing Rev.,
                        (Shadowhills Apartments), 
                        VRDN, 3.10%, 9/3/98 (LOC:
                        Continental Casualty Co.)                  2,700,000
          2,130,000  Dinuba Financing Auth. Lease
                        Rev. COP, Series 1996 A,
                        (Wastewater Treatment Plant),
                        VRDN, 3.70%, 9/2/98 (LOC:
                        Union Bank of California, N.A.)            2,130,000
          6,500,000  East Bay Municipal Utility District
                        Commercial Paper, 3.35%,
                        9/1/98 (LOC: Westdeutsche
                        Landesbank Girozentrale)                   6,500,000
            990,000  Fontana Special Tax, (Community
                        Facilities District No. 2-A),
                        4.00%, 9/1/99 (MBIA)                         993,838
          2,000,000  Fremont COP, (Family Resource
                        Center Financing), VRDN,
                        2.55%, 9/3/98 (LOC: KBC
                        Bank and Insurance Holding)                2,000,000


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

       $  2,000,000  Glendale Industrial Development
                        Auth. Rev., (Reliance
                        Development), VRDN, 3.45%,
                        9/15/98 (LOC: Barclays Bank
                        PLC)                                  $    2,000,000
          1,215,000  Hanford COP, (Public IMPC Corp.),
                        VRDN, 3.75%, 9/3/98 (LOC:
                        Union Bank of California, N.A.)            1,215,000
          6,155,000  Hanford Sewer Rev., Series
                        1996 A, VRDN, 3.75%,
                        9/3/98 (LOC: Union Bank of
                        California, N.A.)                          6,155,000
          3,500,000  Hemet Multifamily Housing Auth.
                        Rev., (Sunwest Resort), VRDN,
                        2.60%, 9/3/98 (LOC: FHLB)                  3,500,000
          4,500,000  Hemet Multifamily Housing Auth.
                        Rev., (West Acacia), VRDN,
                        2.50%, 9/3/98 (LOC: FHLB)                  4,500,000
          8,500,000  Irvine Improvement Bond Act
                        1915 Special Assessment,
                        (Assessment District No. 97-17),
                        VRDN, 3.15%, 9/1/98 (LOC:
                        Bayerische Vereinsbank A.G.)               8,500,000
          5,300,000  Irvine Ranch Water District Rev.,
                        (District Numbers
                        140-240-105-250), VRDN,
                        3.15%, 9/2/98 (LOC: Bank of
                        America N.T. & S.A.)                       5,300,000
         25,000,000  Kern County Superintendent of
                        Schools COP, Series 1996 A,
                        VRDN, 2.90%, 9/3/98 (LOC:
                        Anchor National Life Insurance
                        Company)                                  25,000,000
          4,250,000  Lancaster Redevelopment Agency
                        Rev., Series 1996 C, (20th
                        Street Apartments), VRDN,
                        2.65%, 9/3/98 (LOC: FHLB)                  4,250,000
          2,100,000  Lemore COP, (Golf Course),
                        VRDN, 3.30%, 9/3/98 (LOC:
                        Union Bank of California, N.A.)            2,100,000
          2,600,000  Livermore COP, (Reverse
                        Osmosis), VRDN, 2.80%,
                        9/3/98 (LOC: National
                        Westminster Bank PLC)                      2,600,000
          3,000,000  Loma Linda Water Rev., VRDN,
                        3.70%, 9/2/98 (LOC: Union
                        Bank of California, N.A.)                  3,000,000
          4,740,000  Los Angeles Community
                        Redevelopment Agency Rev., 
                        VRDN, 2.60%, 9/3/98 (LOC:
                        Barclays Bank PLC)                         4,740,000
          1,000,000  Los Angeles County Schools
                        Regionalized Business Services
                        COP, Series 1997 C, (Local
                        Educational Agencies), 4.25%,
                        10/1/98 (FSA)                              1,000,357
         19,890,000  Los Angeles Multifamily Housing
                        Rev., Series 1985 K, VRDN,
                        2.75%, 9/1/98 (LOC: FHLB)                 19,890,000

                                              See Notes to Financial Statements


8      1-800-345-2021


Tax-Free Money Market--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                     (Continued)
AUGUST 31, 1998

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

       $  1,000,000  Los Angeles Unified School
                        District COP, Series 1998 A,
                        4.00%, 11/1/98 (FSA)                  $    1,000,466
          3,000,000  Metropolitan Water District
                        Southern California Waterworks
                        Rev., Series 1998 C, VRDN,
                        2.35%, 9/3/98 (LOC: Bank of
                        America N.T. & S.A.)                       3,000,000
          2,000,000  Modesto Multifamily Housing Rev.,
                        Series 1996 A, (Shadowbrook), 
                        VRDN, 2.70%, 9/3/98 (LOC:
                        Bank of America N.T. & S.A.)               2,000,000
          2,025,000  Modesto Special Tax, (Community
                        Facilities District No. 98-1,
                        VRDN, 2.45%, 9/3/98 (LOC:
                        Wells Fargo Bank, N.A.)                    2,025,000
          1,950,000  Moreno Valley COP, (City Hall
                        Refinancing), VRDN, 3.75%,
                        9/3/98 (LOC: Union Bank of
                        California, N.A.)                          1,950,000
         14,000,000  Oceanside Multifamily Housing
                        Rev., (Lakeridge Apartments), 
                        VRDN, 3.10%, 9/2/98 (LOC:
                        Continental Casualty Co.)                 14,000,000
          8,380,000  Orange County Apartment
                        Development Rev., Series
                        1992 B, (Aliso Creek), VRDN,
                        2.55%, 9/3/98 (LOC: Wells
                        Fargo & Co.)                               8,380,000
          1,200,000  Orange County Sanitation District
                        COP, VRDN, 3.15%, 9/1/98
                        (LOC: National Westminster
                        Bank PLC)                                  1,200,000
            700,000  Palm Springs Redevelopment
                        Agency COP, VRDN, 2.60%,
                        9/2/98 (LOC: Citibank, N.A.)                 700,000
          2,720,000  Poway Unified School District
                        Special Tax Rev., (Community
                        Facilities District No. 1), 4.25%,
                        10/1/98 (MBIA)                             2,721,418
          4,000,000  Puerto Rico Industrial Tourist
                        Educational Medical and
                        Environmental Control Facilities
                        Rev., (Ana G. Mendez University
                        System), VRDN, 2.40%,
                        9/2/98 (LOC: Banco
                        Santander Puerto Rico)                     4,000,000
          9,740,000  Redlands COP, (Sewer Treatment
                        Facilities), VRDN, 2.30%, 
                        9/2/98 (FGIC) (SBBPA:
                        General Electric Capital Corp.)            9,740,000
          9,045,000  Redlands COP, (Water Treatment
                        Facilities), VRDN, 2.30%, 
                        9/2/98 (FGIC) (SBBPA:
                        General Electric Capital Corp.)            9,045,000
          5,000,000  Rialto Public Financing Auth. Tax
                        Allocation,  Series 1998 A, 
                        (Agua Mansa & Industrial),
                        VRDN, 3.75%, 9/2/98 (LOC:
                        Union Bank of California, N.A.)            5,000,000

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

       $  2,210,000  Richmond Joint Powers Financing
                        Port Auth. Term Lease Rev.,
                        VRDN, 3.35%, 9/1/98 (LOC:
                        Union Bank of California, N.A.)       $    2,210,000
          3,420,000  Riverside County Multifamily
                        Housing Rev., (Ambergate
                        Apartments), VRDN, 2.45%,
                        9/3/98 (LOC: Union Bank of
                        California, N.A.)                          3,420,000
          4,500,000  Riverside County Teeter Notes
                        Commercial Paper, 3.10%,
                        10/1/98 (LOC: Westdeutsche
                        Landesbank Girozentrale)                   4,500,000
          4,000,000  Riverside County Teeter Notes
                        Commerical Paper, 3.10%,
                        10/8/98 (LOC: Westdeutsche
                        Landesbank Girozentrale)                   4,000,000
          1,715,000  Rohnert Park Multifamily Housing
                        Rev., (Crossbrook Apartments),
                        VRDN, 2.30%, 9/2/98 (FNMA
                        Collateral Agreement)                      1,715,000
          5,990,000  Sacramento County Multifamily
                        Housing Rev., (River Oaks), 
                        VRDN, 2.90%, 9/3/98 (LOC:
                        Chase Manhattan Bank)                      5,990,000
          3,400,000  Sacramento County Multifamily
                        Housing Rev., Series 1996 A,
                        VRDN, 2.35%, 9/2/98 (LOC:
                        California State Teachers'
                        Retirement System)                         3,400,000
         22,875,000  San Bernardino County COP,
                        VRDN, 3.26%, 9/3/98 (MBIA)
                        (SBBPA: Merrill Lynch & Co.,
                        Inc.)                                     22,875,000
         15,000,000  San Bernardino County Multifamily
                        Housing Rev., 5.45%, 5/1/99
                        (Put Agreement: National
                        Westminster Bank PLC)
                        (Acquired 5/8/98, Cost
                        $15,206,100)(1)                           15,145,387
          3,350,000     San Bernardino County Multifamily 
                        Housing Rev., Series
                        1992 A, (Arrowview Park Apartments),
                        VRDN, 2.50%, 9/3/98
                        (LOC: FHLB)                                3,350,000
          1,800,000     San Bernardino County Multifamily 
                        Housing Rev., Series
                        1993  A, (Monterey Villas Apartments),
                        VRDN, 2.50%, 9/3/98 (LOC:
                        FHLB)                                      1,800,000
          2,800,000  San Bernardino County Multifamily
                        Housing Rev., Series 1997 A,
                        (Mountain View), VRDN, 2.65%,
                        9/3/98 (LOC: FHLB)                         2,800,000
         12,625,000  San Diego County Tax and Rev.
                        Anticipation Notes, 4.50%,
                        9/30/98 (LOC: Bank of Nova
                        Scotia, Canadian Imperial Bank,
                        Commerzbank A.G.)                         12,631,478

See Notes to Financial Statements


                                                 www.americancentury.com       9


Tax-Free Money Market--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                     (Continued)
AUGUST 31, 1998

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

       $  4,300,000  San Diego Multifamily Housing Rev., 
                        Series 1993 A, (Coral Point Apartments),
                        VRDN, 3.20%, 9/3/98 (LOC:
                        Continental Casualty Co.)             $    4,300,000
          3,285,000  San Francisco City and County
                        Redevelopment Financing Auth.
                        Rev., (Yerba Buena Garden),
                        VRDN, 2.50%, 9/2/98 (LOC:
                        National Westminster Bank PLC)             3,285,000
          2,400,000  San Francisco City and County
                        Unified School District Tax &
                        Rev. Anticipation Notes, 4.50%,
                        9/22/99                                    2,427,024
          3,000,000  Santa Barbara County Tax & Rev.
                        Anticipation Notes, Series
                        1997 A, 4.50%, 10/1/98                     3,001,482
          2,625,000  Simi Valley Multifamily Housing
                        Rev., Series 1993 A, VRDN,
                        2.60%, 9/3/98 (LOC: Bank of
                        America N.T. & S.A.)                       2,625,000
            525,000  South San Francisco COP,
                        (Quality Control Plant), VRDN,
                        2.80%, 9/3/98 (LOC: National
                        Westminster Bank PLC)                        525,000
          1,000,000  State of California GO, 5.75%,
                        9/1/98                                     1,000,000

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

       $  5,400,000  Three Valleys Municipal Water
                        District COP, (Miramar Water
                        Treatment), VRDN, 2.55%,
                        9/2/98 (LOC: Barclays Bank
                        PLC)                                  $    5,400,000
          1,500,000  Triunfo Sanitation District Rev.,
                        VRDN, 2.50%, 9/2/98 (LOC:
                        Banque Nationale de Paris S.A.)            1,500,000
          2,000,000  West Hollywood COP, VRDN,
                        3.75%, 9/3/98 (LOC: Union
                        Bank of California, N.A.)                  2,000,000
          1,700,000  West Sacramento Financing Auth.
                        Special Tax Rev., Series 1996 C, 
                        VRDN, 2.45%, 9/3/98 (LOC:
                        Wells Fargo Bank, N.A.)                    1,700,000
          1,900,000  Westminster Redevelopment
                        Agency Tax Allocation Rev.,
                        (Commercial Redevelopment
                        Project No. 1), VRDN, 2.70%,
                        9/3/98 (AMBAC) (SBBPA:
                        Landesbank Hessen - Thuringen
                        Girozentrale)                              1,900,000
                                                            ------------------
TOTAL INVESTMENT SECURITIES--100.0%                             $456,861,275
                                                            ==================
NOTES TO SCHEDULE OF INVESTMENTS

AMBAC = AMBAC Assurance Corporation

COP = Certificates of Participation

FGIC = Financial Guaranty Insurance Co.

FHLB = Federal Home Loan Bank

FNMA = Federal National Mortgage Association

FSA = Financial Security Assurance Inc.

GIC = Guaranteed Investment Contract

GO = General Obligation

LOC = Letter of Credit

MBIA = MBIA Insurance Corp.

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
August 31, 1998.

(1) Security was purchased under rule 144A of the Securities Act of 1933 or is a
private  placement,  and  unless  registered  under  the  Act or  exempted  from
registration,  may  only be  sold  to  qualified  institutional  investors.  The
aggregate value of these securities at August 31, 1998, was  $22,435,387,  which
represented  4.9% of net assets.  None of these  securities are considered to be
illiquid.

(2)  Interest  reset date is  indicated  and used in  calculating  the  weighted
average portfolio maturity. Rate shown is effective August 31, 1998.

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

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

                                              See Notes to Financial Statements


10      1-800-345-2021


California Municipal Money Market--Performance
- --------------------------------------------------------------------------------
TOTAL RETURNS AS OF AUGUST 31, 1998
                                           INCEPTION 12/31/90
                                                    CALIFORNIA TAX-EXEMPT
                      CALIFORNIA MUNICIPAL          MONEY MARKET FUNDS(2)
                         MONEY MARKET        AVERAGE RETURN     FUND'S RANKING
- --------------------------------------------------------------------------------
6 MONTHS(1) ...............  1.58%               1.41%                --
1 YEAR ....................  3.20%               2.90%            8 OUT OF 55
- --------------------------------------------------------------------------------
AVERAGE ANNUAL RETURNS
3 YEARS ...................  3.19%               2.94%           10 OUT OF 49
5 YEARS ...................  3.01%               2.85%            8 OUT OF 43
LIFE OF FUND ..............  3.13%               2.91%            6 OUT OF 35

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

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

See pages 26-27 for more information about returns and Lipper fund rankings.


PORTFOLIO AT A GLANCE
                              8/31/98           8/31/97
NUMBER OF SECURITIES            58                57
WEIGHTED AVERAGE
MATURITY                      40 DAYS           38 DAYS
EXPENSE RATIO                  0.50%             0.52%


YIELDS AS OF AUGUST 31, 1998

7-DAY CURRENT YIELD            2.86%

7-DAY EFFECTIVE YIELD          2.90%

7-DAY TAX-EQUIVALENT YIELDS
34.70% TAX BRACKET             4.38%
37.42% TAX BRACKET             4.57%
41.95% TAX BRACKET             4.93%
45.22% TAX BRACKET             5.22%

Past performance does not guarantee future results.

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

Yields will fluctuate, and although the fund seeks to preserve the value of your
investment  at $1 per share,  it is possible to lose money by  investing  in the
fund.


                                             www.americancentury.com          11


California Municipal Money Market--Q&A
- --------------------------------------------------------------------------------

     An  interview  with Todd  Pardula,  a portfolio  manager on the  California
Municipal Money Market fund investment team.

HOW DID CALIFORNIA MUNICIPAL MONEY MARKET PERFORM DURING THE FISCAL YEAR?

     We continued to outperform  the average  California  money market fund. For
the fiscal year ended  August 31,  1998,  the  portfolio  had a total  return of
3.20%,  compared with the 2.90% average  return of the 55 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.)

HOW DID CALIFORNIA MUNICIPAL MONEY MARKET'S YIELD COMPARE?

     The  portfolio  continued to produce a  relatively  high level of state and
federal  tax-exempt  income.  On August 31, 1998,  its 7-day  current  yield was
2.86%,  compared with the 2.42% yield of the average  California  tax-free money
fund,according  to IBC's Money Fund  Report.  One reason for the higher yield is
that we increased our holdings of securities subject to the federal  alternative
minimum tax (AMT), which typically have higher yields than non-AMT securities.

WHAT PERCENTAGE OF THE PORTFOLIO'S SECURITIES ARE SUBJECT TO THE AMT?

     More than 80% of assets are  invested in AMT  securities,  which tend to be
bonds issued by municipalities  for private-sector  purposes.  Interest from AMT
securities can have tax implications for shareholders subject to the alternative
minimum tax.  Because of this  potential tax liability,  AMT securities  usually
offer slightly  higher  yields--perhaps  5-10 basis points (a basis point equals
0.01%).

BESIDES HAVING A LOT OF AMT SECURITIES, WHY DID THE PORTFOLIO OUTPERFORM?

     The primary reason is that the California  Municipal  Money Market fund has
lower-than-average  expenses.  Lower expenses mean higher yields and returns for
shareholders.

     Another  key  factor  behind the  outperformance  is that we made some very
timely decisions  regarding the fund's maturity.  For example, in early January,
the  portfolio's  maturity  was a little  shorter  than  many  other  California
tax-exempt  money  market  funds.  That  turned  out  to  be an  advantage  when
short-term interest rates rose in response to a strong U.S. economy.

     We  lengthened  the  average  maturity  in  May--when   short-term   yields
peaked--by acquiring a large amount of higher-yielding one-year securities. As a
result,  the  average  maturity  jumped  from 44 to 71 days,  at a time when the
average  California  money fund had a maturity of 38 days.  Typically,  we would
purchase one-year  securities in June and July, when California note issuance is
plentiful. But buying in May meant we were able to lock in yields at 20-30 basis
points more than we would have earned in June or July.

WHAT OTHER EXTERNAL FACTORS AFFECTED THE FUND?

     California's  strong  economy  increased  tax  revenues,  which reduced the
borrowing needs of local  municipalities  and lowered the level of new municipal
debt issuance.  Plus, with long-term  interest rates so low, most issuers prefer
to borrow long term, further reducing the supply of short-term securities.  With
supply limited, prices on short-term securities rose and yields fell.

[left margin]

"WE CONTINUED TO OUTPERFORM THE AVERAGE CALIFORNIA MONEY MARKET FUND."

PORTFOLIO COMPOSITION BY SECURITY TYPE
AS OF AUGUST 31, 1998
Variable-Rate Notes         79%
Put Bonds                   15%
Municipal Notes              3%
Bonds less than 1 Year       3%

AS OF FEBRUARY 28, 1998
Variable-Rate Notes         76%
Municipal Notes              9%
Put Bonds                    8%
Bonds less than 1 Year       5%
Commercial Paper             2%

Security types are defined on page 27.


12       1-800-345-2021


California Municipal Money Market--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

HAS THE  ECONOMIC  MELTDOWN  IN ASIA HAD AN EFFECT ON THE  CALIFORNIA  MUNICIPAL
MARKET?

     So far,  the Asian  economic  crisis  has not  significantly  dampened  the
California  economy.  But Asia is a major trading partner,  so we expect trouble
there will eventually weigh on California.  However,  the crisis has had a major
impact on Japanese  banks,  many of which  provide  letters of credit (LOCs) for
California tax-exempt money market securities.  These banks, which already faced
major credit problems because of deflated Japanese real estate values, are major
lenders to companies in Southeast Asia.

DOES CALIFORNIA MUNICIPAL MONEY MARKET HAVE ANY EXPOSURE TO JAPANESE BANKS?

     No. We were one of the first mutual fund  companies  to eliminate  Japanese
bank LOCs, instead  purchasing  securities backed by North American and European
LOC providers.

     Our universe of approved  LOC  providers  is under  constant  review by our
credit team.  For  instance,  we removed  Bankers  Trust from our approved  list
because  of its  exposure  to  emerging  markets.  That  means  we will  not buy
tax-exempt money market  securities  backed by Bankers Trust,  regardless of the
financial strength of the security's issuer.

     In  general,  our credit  team  leans  toward  the  conservative  side when
evaluating money market instruments and the banks that back them. So even though
Japanese-backed  securities  yield as much as 100 basis  points  more than other
instruments,  we don't believe it's in our shareholders'  best interests to take
on the added credit risk to reach for additional yield.

BUT THE FUND'S CREDIT QUALITY DID CHANGE DURING THE FISCAL YEAR (SEE THE TABLE
AT RIGHT). WHY?

     As of August 31, 1998, 86% of the portfolio was rated SP1+ or SP1, Standard
& Poor's  Corporation's  two highest  credit  ratings for  short-term  municipal
securities. Our 14% SP2 exposure applies primarily to securities backed by Union
Bank of California,  which is owned by Bank of Tokyo Mitsubishi. We believe that
Union Bank of California,  which was downgraded along with Bank of Tokyo earlier
this year, is a stronger credit than the S&P rating reflects. That's because the
bank's  operations  are  primarily  limited to the state of  California  and are
subject to U.S. banking regulations.

WHAT IS YOUR OUTLOOK?

     Although we don't see a recession,  we believe that the California  economy
is likely to slow down. A slowing economy exerts  downward  pressure on interest
rates,  which  means that money  market  yields of all types are likely to fall.
However,  because yields on longer-term  tax-exempt money market  securities are
relatively  unattractive  right now, we have little  interest in  extending  the
fund's  maturity  at  this  time.  We  will  likely  continue  our  emphasis  on
variable-rate  notes (also known as "floaters"),  whose rates reset either daily
or weekly.  But we'll likely extend the fund's average maturity if yields become
more attractive.

[right margin]

"WE WERE ONE OF THE FIRST MUTUAL FUND COMPANIES TO ELIMINATE SECURITIES BACKED
BY JAPANESE BANKS."

PORTFOLIO COMPOSITION BY CREDIT RATING
                 % OF FUND INVESTMENTS
                 AS OF            AS OF
                8/31/98          2/28/98
SP1+              71%              66%
SP1               15%              31%
SP2               14%               3%

Ratings provided by Standard & Poor's.  See Credit Rating  Guidelines on page 26
for more information.

"ALTHOUGH WE DON'T SEE A RECESSION, WE BELIEVE CALIFORNIA'S ECONOMY IS LIKELY
TO SLOW DOWN."


                                                www.americancentury.com       13


Municipal Money Market--Schedule of Investments
- --------------------------------------------------------------------------------

AUGUST 31, 1998

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

SHORT-TERM MUNICIPAL SECURITIES
         $3,000,000  ABN Amro Munitops Certificates
                        Trust Receipts, VRDN, 3.30%,
                        9/2/98 (FGIC) (SBBPA: ABN
                        Amro Bank N.V.) (Acquired
                        8/19/98, Cost $3,000,000)(1)           $    3,000,000
          3,000,000  Alameda County Industrial
                        Development Auth. Rev., (Bat
                        Properties), VRDN, 2.70%,
                        9/3/98 (LOC: Wells Fargo
                        Bank, N.A.)                                 3,000,000
          2,500,000  Alameda County Industrial
                        Development Auth. Rev., (Tristar
                        Plating), VRDN, 2.70%, 9/3/98
                        (LOC: Wells Fargo Bank, N.A.)               2,500,000
          1,900,000  Alameda County Industrial
                        Development Auth. Rev., Series
                        1994 A, (Scientific Technology),
                        VRDN, 2.90%, 9/2/98 (LOC:
                        Banque Nationale de Paris S.A.)             1,900,000
            700,000  Alameda County Industrial
                        Development Auth. Rev., Series
                        1996 A, (Edward L. Shimmon
                        Inc.), VRDN,  2.80%, 9/3/98
                        (LOC: Banque Nationale de
                        Paris S.A.)                                   700,000
          1,800,000  Alameda County Industrial
                        Development Auth. Rev., Series
                        1997 A, (Adeline Association),
                        VRDN, 2.70%, 9/3/98 (LOC:
                        Wells Fargo Bank, N.A.)                     1,800,000
          2,250,000  Alameda County Industrial
                        Development Auth. Rev., Series
                        1997 A, (Plyproperties), VRDN,
                        2.80%, 9/3/98 (LOC: Wells
                        Fargo Bank, N.A.)                           2,250,000
          2,200,000  Alameda County Industrial
                        Development Auth. Rev., Series
                        1998 A, (Mekkimen Family
                        Trust), VRDN, 2.80%, 9/3/98
                        (LOC: Banque Nationale de
                        Paris S.A.)                                 2,200,000
          2,000,000  Association of Bay Area
                        Governments Financing Auth.
                        for Nonprofit Corps. Multifamily
                        Rev., Series 1998 A, (Vintage
                        Chateau), VRDN, 2.80%,
                        9/2/98 (LOC: Union Bank of
                        California, N.A.)                           2,000,000
          2,200,000  Association of Bay Area
                        Governments Multifamily Housing 
                        Rev.,  Series 1997 A,
                        (Mountain View Apartments), 
                        VRDN, 2.95%, 9/3/98 (LOC:
                        Comerica Bank, N.A.)                        2,200,000
          3,100,000  California Health Facilities Auth.
                        Rev., (Episcopal Home Project), 
                        VRDN, 3.65%, 9/1/98 (LOC:
                        Union Bank of California, N.A.)             3,100,000

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

         $4,265,000  California Housing Finance
                        Agency Single Family Mortgage
                        Purpose Rev., Series 1998 B,
                        3.60%, 4/1/99 (FHA)                    $    4,265,000
          6,955,000  California Housing Financing
                        Agency Rev., Series 1996 A,
                        Class A, VRDN, 3.41%,
                        9/3/98 (LOC: Caisse Des
                        Depots et Consignations)
                        (Acquired 2/4/98, Cost
                        $6,955,000)(1)                              6,955,000
          1,255,000  California Housing Financing
                        Agency Rev., Series 1998 C,
                        3.55%, 2/1/99 (Investment
                        Agreement: FGIC)                            1,255,000
          6,000,000  California Housing Financing
                        Agency Rev., Series 1998 E,
                        3.55%, 3/12/99 (Investment
                        Agreement: American
                        International Group, Inc.)                  6,000,000
          3,230,000  California Housing Financing
                        Agency Rev., VRDN, 3.26%,
                        9/3/98 (MBIA) (SBBPA:
                        Credit Suisse First Boston, Inc.)
                        (Acquired 12/7/95, Cost
                        $3,230,000)(1)                              3,230,000
          4,000,000  California Pollution Control
                        Financing Auth. Resource
                        Recovery Rev., (OMS Equity
                        Stanislaus), VRDN, 3.10%,
                        9/1/98 (LOC: Westdeutsche
                        Landesbank Girozentrale)                    4,000,000
          9,100,000  California Pollution Control
                        Financing Auth. Solid Waste
                        Disposal Rev., Series 1994 A,
                        (Western Waste Industries),
                        VRDN, 2.75%, 9/3/98 (LOC:
                        Union Bank of California, N.A.)             9,100,000
          1,225,000  California Pollution Control
                        Financing Auth. Solid Waste
                        Disposal Rev., Series 1998 A,
                        (Allan Co.), VRDN, 2.50%,
                        9/2/98 (LOC: Bank of America
                        N.T. & S.A.)                                1,225,000
          2,300,000  California Public Capital
                        Improvements Financing Auth.
                        Rev., Series 1988 C, VRDN,
                        3.65%, 9/15/98 (LOC:
                        National Westminster Bank
                        PLC)                                        2,300,000
          6,100,000  California State Economic
                        Development Financing Auth.
                        Industrial Development Rev.,
                        (Applied Aerospace), VRDN,
                        2.90%, 9/2/98 (LOC:
                        American National Bank and
                        Trust Company of Chicago)                   6,100,000

                                              See Notes to Financial Statements


14      1-800-345-2021


Municipal Money Market--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                     (Continued)
AUGUST 31, 1998

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

         $1,200,000  California State Economic
                        Development Financing Auth.
                        Industrial Development Rev.,
                        (CALCO), VRDN, 3.45%,
                        9/2/98 (LOC: Wells Fargo
                        Bank, N.A.)                            $    1,200,000
          2,000,000  California State Economic
                        Development Financing Auth.
                        Industrial Development Rev.,
                        (River Ranch Fresh Foods),
                        VRDN, 2.80%, 9/3/98 (LOC:
                        NationsBank, N.A.) (Acquired
                        8/5/98, Cost $2,000,000)(1)                 2,000,000
          2,400,000  California State Economic
                        Development Financing Auth.
                        Industrial Development Rev.,
                        (Scientific Specialties), VRDN,
                        2.90%, 9/2/98 (LOC: Bank of
                        America N.T. & S.A.)                        2,400,000
          3,040,000  California State Economic
                        Development Financing Auth.
                        Industrial Development Rev.,
                        (Vortech Engineering Inc.),
                        VRDN, 3.45%, 9/2/98 (LOC:
                        Bank of Hawaii)                             3,040,000
          1,468,364  California State Economic
                        Development Financing Auth.
                        Industrial Development Rev.,
                        (Wesflex Pipe Manufacturing),
                        VRDN, 2.95%, 9/3/98 (LOC:
                        Wells Fargo Bank, N.A.)                     1,468,364
          2,500,000  California State Economic
                        Development Financing Auth.
                        Rev., Series 1998 B, (California
                        Independent System), VRDN,
                        3.20%, 9/1/98 (LOC: Bank of
                        America N.T. & S.A.)                        2,500,000
          3,000,000  California State GO, Series 1997
                        BJ, 4.125%, 6/1/99                          3,000,523
          5,000,000  California State Veterans GO,
                        VRDN, 3.26%, 9/3/98 (FSA)
                        (SBBPA: Merrill Lynch & Co.,
                        Inc.) (Acquired 12/30/97, Cost
                        $5,000,000)(1)                              5,000,000
          1,000,000  California Statewide Communities
                        Auth. Industrial Development
                        Rev., Series 1998 C, (Nichols
                        Pistachio), VRDN, 3.00%,
                        9/3/98 (LOC: Bank of America
                        N.T. & S.A.)                                1,000,000
          5,900,000  California Statewide Communities
                        Development Auth. Multifamily
                        Housing Rev., Series 1997 A,
                        (Plaza Club Apartments), VRDN,
                        3.15%, 9/2/98 (LOC:
                        Comerica Bank, N.A.)                        5,900,000

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

         $1,200,000  California Statewide Communities
                        Development Auth. Multifamily
                        Housing Rev., Series 1997 G,
                        (Sunrise of Moraga), VRDN,
                        3.15%, 9/3/98 (LOC:
                        Commerzbank A.G.)                      $    1,200,000
          1,365,000  California Statewide Communities
                        Development Auth. Rev., Series
                        1996 G, (Lansmont Property),
                        VRDN, 2.85%, 9/2/98 (LOC:
                        Wells Fargo Bank, N.A.)                     1,365,000
          3,615,000  Contra Costa County COP,
                        (Concord Healthcare Center), 
                        VRDN, 3.35%, 9/2/98 (LOC:
                        NationsBank, N.A.)                          3,615,000
          1,800,000  Fowler Industrial Development
                        Auth. Rev., (Bee Sweet Citrus
                        Inc.), VRDN, 3.35%, 9/3/98
                        (LOC: Bank of America N.T. &
                        S.A.)                                       1,800,000
          1,000,000  Irvine Industrial Development Auth.
                        Rev., Series 1997 A, (Sabritec), 
                        VRDN, 3.50%, 9/2/98 (LOC:
                        Union Bank of California, N.A.)             1,000,000
          2,200,000  Lassen Municipal Utility District
                        Rev., Series 1996 A, VRDN, 
                        2.90%, 9/3/98 (FSA) (SBBPA:
                        Credit Local de France)                     2,200,000
          2,225,000  Los Angeles Industrial
                        Development Auth. Rev.,
                        (Alliance Resources), VRDN,
                        2.40%, 9/2/98 (LOC: California
                        State Teachers' Retirement
                        System)                                     2,225,000
          1,900,000  Los Angeles Industrial
                        Development Auth. Rev., (Delta
                        Tau Data System Inc.), VRDN,
                        2.40%, 9/2/98 (LOC: California
                        State Teachers' Retirement
                        System)                                     1,900,000
          1,450,000  Los Angeles Industrial
                        Development Auth. Rev.,
                        (Firstclass Foods-Trojan), VRDN,
                        2.40%, 9/2/98 (LOC: California
                        State Teachers' Retirement
                        System)                                     1,450,000
          2,065,000  Los Angeles Industrial
                        Development Auth. Rev., (Kairak
                        Inc.), VRDN, 3.25%, 9/2/98
                        (LOC: Bank of Hawaii)                       2,065,000
          2,160,000  Los Angeles Industrial
                        Development Auth. Rev.,
                        (Keystone Engineering
                        Company), VRDN, 3.25%,
                        9/2/98 (LOC: Bank of Hawaii)                2,160,000
          3,500,000  Los Angeles Multifamily Housing
                        Rev., Series 1997 D, (Mission
                        Village Terrace), VRDN, 2.70%,
                        9/3/98 (LOC: FHLB)                          3,500,000

See Notes to Financial Statements


                                                www.americancentury.com       15


Municipal Money Market--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                     (Continued)
AUGUST 31, 1998

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

         $2,900,000  Orange County Industrial
                        Development Auth. Rev., Series
                        1997 A, (Control Air
                        Conditioning), VRDN, 3.45%,
                        9/2/98 (LOC: California State
                        Teachers' Retirement System)           $    2,900,000
          3,220,000  Orange County Public Financing
                        Auth. Waste Management
                        Systems Rev., 4.75%, 12/1/98
                        (AMBAC)                                     3,226,667
          1,300,000  Orange County Sanitation District
                        COP, VRDN, 3.15%, 9/1/98
                        (LOC: National Westminster
                        Bank PLC)                                   1,300,000
          3,600,000  Oxnard Industrial Development
                        Auth. Rev., (Western Saw
                        Manufacturers), VRDN, 2.90%,
                        9/2/98 (LOC: California State
                        Teachers' Retirement System)                3,600,000
          2,400,000  Pinole Redevelopment Agency,
                        Series 1998 A, (East Bluff
                        Apartments), VRDN, 2.95%,
                        9/3/98 (LOC: Comerica
                        Bank-CA)                                    2,400,000
          2,660,000  Pleasant Hill Redevelopment
                        Agency Multifamily Housing
                        Rev., Series 1996 A,
                        (Chateau III), VRDN, 3.15%,
                        9/3/98 (LOC: Commerzbank
                        A.G.)                                       2,660,000
          2,000,000  Rialto Public Financing Auth. 
                        Tax Allocation,  Series
                        1998 A, (Agua Mansa & Industrial), 
                        VRDN, 3.75%, 9/2/98 (LOC:
                        Union Bank of California, N.A.)             2,000,000

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

         $2,205,000  Riverside County Industrial
                        Development Auth. Rev.,
                        (Merrick Engineering Inc.),
                        VRDN, 3.45%, 9/2/98 (LOC:
                        Wells Fargo Bank, N.A.)                $    2,205,000
          9,500,000  Sacramento County Housing Auth.
                        Rev., Issue 1992 A, (Shadowood
                        Apartments), VRDN, 2.55%,
                        9/2/98 (LOC: General Electric
                        Capital Corp.)                              9,500,000
          9,840,000  San Bernardino County Single
                        Family Mortgage Rev., Series
                        1998 A, 4.00%, 5/1/99
                        (GNMA/FNMA Collateral)                      9,840,000
          3,500,000  San Diego County Tax and Rev.
                        Anticipation Notes, 4.50%,
                        9/30/98 (LOC: Bank of Nova
                        Scotia, Canadian Imperial Bank,
                        Commerzbank A.G.)                           3,501,763
            900,000  San Diego Industrial Development
                        Rev., Series 1987 A, 
                        (Kaiser Aerospace and Electricity),
                        VRDN, 2.90%, 9/3/98 (LOC:
                        ABN Amro Bank N.V.)                           900,000
          2,800,000  San Francisco City & County
                        Airport Rev., (Community
                        International Airport, SGA 50),
                        VRDN, 3.30%, 9/2/98 (MBIA)
                        (SBBPA: Societe Generale)                   2,800,000
          3,000,000  San Jose Multifamily Housing Rev.,
                        Series 1998 A, (Carlton Plaza), 
                        VRDN, 2.75%, 9/3/98 (LOC:
                        Commerzbank A.G.)                           3,000,000
          1,500,000  Santa Barbara County Tax & Rev.
                        Anticipation Notes, Series
                        1997 A, 4.50%, 10/1/98                      1,500,735
                                                             -----------------
TOTAL INVESTMENT SECURITIES--100.0%                              $172,403,052
                                                             =================

                                              See Notes to Financial Statements


16      1-800-345-2021


Municipal Money Market--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

NOTES TO SCHEDULE OF INVESTMENTS

AMBAC = AMBAC Assurance Corporation

COP = Certificates of Participation

FGIC = Financial Guaranty Insurance Co.

FHA = Federal Housing Authority

FHLB = Federal Home Loan Bank

FNMA = Federal National Mortgage Association

FSA = Financial Security Assurance Inc.

GNMA = Government National Mortgage Association

GO = General Obligation

LOC = Letter of Credit

MBIA = MBIA Insurance Corp.

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
August 31, 1998.

(1) Security was purchased under Rule 144A of the Securities Act of 1933 or is a
private  placement,  and  unless  registered  under  the  Act or  exempted  from
registration,  may be  sold  only  to  qualified  institutional  investors.  The
aggregate value of these securities at August 31, 1998, was  $20,185,000,  which
represented  11.7% of net assets.  None of these securities are considered to be
illiquid.

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

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

See Notes to Financial Statements


                                                www.americancentury.com       17


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

                                                   TAX-FREE           MUNICIPAL
AUGUST 31, 1998                                  MONEY MARKET       MONEY MARKET

ASSETS
Investment securities, at value
(amortized cost and cost
for federal income tax purposes)
(Note 1) ...................................    $ 456,861,275     $ 172,403,052
Cash .......................................        1,121,640         1,795,748
Interest receivable ........................        2,351,137           783,271
                                                -------------     -------------

                                                  460,334,052       174,982,071
                                                -------------     -------------
LIABILITIES
Disbursements in excess
of demand deposit cash .....................        1,567,826         2,291,746
Payable for investments purchased ..........        2,427,024              --
Payable for capital shares redeemed ........          154,038            24,943
Accrued management fees
(Note 2) ...................................          190,645            73,140
Payable for trustees' fees
and expenses ...............................              959               620
                                                -------------     -------------
                                                    4,340,492         2,390,449
                                                -------------     -------------

Net Assets .................................    $ 455,993,560     $ 172,591,622
                                                =============     =============
CAPITAL SHARES
Outstanding (unlimited number
of shares authorized) ......................      455,993,563       172,628,461
                                                =============     =============

Net Asset Value Per Share ..................    $        1.00     $        1.00
                                                =============     =============
NET ASSETS CONSIST OF:
Capital paid in ............................    $ 455,993,563     $ 172,628,461
Undistributed net investment income ........          299,086           122,436
Accumulated net realized loss
on investment transactions .................         (299,089)         (159,275)
                                                -------------     -------------
                                                $ 455,993,560     $ 172,591,622
                                                =============     =============

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

NET ASSETS are also broken out by capital (money invested by shareholders);  net
investment income not yet paid to shareholders or net investment losses; and net
gains earned on investments  but not yet paid to  shareholders  or net losses on
investments  (known as realized  gains or losses).  This breakout  tells you the
value of net assets that are  performance-related,  such as investment  gains or
losses, and the value of net assets that are not related to performance, such as
shareholder investments and redemptions.

                                              See Notes to Financial Statements


18      1-800-345-2021


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

                                                   TAX-FREE           MUNICIPAL
YEAR ENDED AUGUST 31, 1998                        MONEY MARKET      MONEY MARKET

INVESTMENT INCOME

Income:
Interest ...................................     $ 15,542,270      $  6,258,285
                                                 ------------      ------------
Expenses (Note 2):
Management fees ............................        2,159,236           845,834
Trustees' fees and expenses ................           12,683             8,166
                                                 ------------      ------------
                                                    2,171,919           854,000
                                                 ------------      ------------
Net investment income ......................       13,370,351         5,404,285
                                                 ------------      ------------
NET REALIZED LOSS ON INVESTMENTS
Net realized loss on investments ...........             (580)             (669)
                                                 ------------      ------------
Net Increase in Net Assets
Resulting from Operations ..................     $ 13,369,771      $  5,403,616
                                                 ============      ============

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

Fund OPERATIONS include:

* income earned from investments

* management fees and other expenses

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

See Notes to Financial Statements


                                                www.americancentury.com       19


Statements of Changes in Net Assets
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
YEARS ENDED AUGUST 31, 1998 AND AUGUST 31, 1997


                                            TAX-FREE MONEY MARKET             MUNICIPAL MONEY MARKET
Increase (Decrease) in Net Assets          1998              1997             1998             1997
OPERATIONS
<S>                                   <C>              <C>              <C>              <C>          
Net investment income .............   $  13,370,351    $  13,240,936    $   5,404,285    $   5,718,165
Net realized loss on investments ..            (580)            --               (669)            --
                                      -------------    -------------    -------------    -------------
Net increase in net assets
  resulting from operations .......      13,369,771       13,240,936        5,403,616        5,718,165
                                      -------------    -------------    -------------    -------------
DISTRIBUTIONS TO SHAREHOLDERS
From net investment income ........     (13,369,357)     (13,314,031)      (5,398,614)      (5,716,498)
                                      -------------    -------------    -------------    -------------

CAPITAL SHARE TRANSACTIONS
Proceeds from shares sold .........     434,812,626      419,433,691      153,582,331      161,382,680
Proceeds from reinvestment
of distributions ..................      12,745,632       12,569,974        5,174,073        5,431,054
Payments for shares redeemed ......    (409,349,170)    (439,992,918)    (156,647,128)    (192,858,059)
                                      -------------    -------------    -------------    -------------
Net increase (decrease) in
  net assets from capital
  share transactions ..............      38,209,088       (7,989,253)       2,109,276      (26,044,325)
                                      -------------    -------------    -------------    -------------
Net increase (decrease)
in net assets .....................      38,209,502       (8,062,348)       2,114,278      (26,042,658)

NET ASSETS
Beginning of year .................     417,784,058      425,846,406      170,477,344      196,520,002
                                      -------------    -------------    -------------    -------------
End of year .......................   $ 455,993,560    $ 417,784,058    $ 172,591,622    $ 170,477,344
                                      =============    =============    =============    =============
Undistributed net
investment income .................   $     299,086    $     397,834    $     122,436    $     116,765
                                      =============    =============    =============    =============

TRANSACTIONS IN SHARES
OF THE FUNDS
Sold ..............................     434,812,626      419,433,691      153,582,331      161,382,680
Issued in reinvestment
of distributions ..................      12,745,632       12,569,974        5,174,073        5,431,054
Redeemed ..........................    (409,349,170)    (439,992,918)    (156,647,128)    (192,858,059)
                                      -------------    -------------    -------------    -------------
Net increase (decrease) ...........      38,209,088       (7,989,253)       2,109,276      (26,044,325)
                                      =============    =============    =============    =============
</TABLE>

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

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

* distributions--income and gains distributed to shareholders

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

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

                                              See Notes to Financial Statements


20      1-800-345-2021


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

AUGUST 31, 1998

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)  and  American  Century  - Benham
California  Municipal Money Market Fund (Municipal Money Market) (the Funds) are
two of the seven funds issued by the Trust. Tax-Free Money Market is diversified
and Municipal Money Market is non-diversified under the 1940 Act. The Funds seek
income which is exempt from federal and California income taxes.  Tax-Free Money
Market and  Municipal  Money  Market  seek to obtain as high a level of interest
income as is consistent with prudent  investment  management and conservation of
shareholders' capital. 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 are in  accordance  with  generally
accepted accounting principles.

     Security  Valuations--Portfolio  securities  are valued at amortized  cost,
which  approximates  current  market  value.  When  valuations  are not  readily
available,  securities are valued at fair value as determined in accordance with
procedures adopted by the Board of Trustees.

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

     Investment  Income--Interest  income is recorded  on the accrual  basis and
includes accretion of discounts and amortization of premiums.

     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 income taxes

     Distributions to Shareholders--Distributions from net investment income are
declared and credited daily and distributed  monthly. The Funds do not expect to
realize any long-term  capital gains, and accordingly,  do not expect to pay any
capital  gains  distributions.   For  the  year  ended  August  31,  1998,  100%
(unaudited) of the Funds'  distributions  from net  investment  income have been
designated as exempt from federal and California state income tax.

     At August 31, 1998,  accumulated  net realized  capital loss carryovers for
Tax-Free Money Market of approximately $299,089 (expiring 1999 through 2006) and
for Municipal  Money Market of  approximately  $159,275  (expiring  2003 through
2006) may be used to offset future taxable gains.

     The  character of  distributions  made during the year from net  investment
income  or  net  realized   capital   gains  may  differ  from  their   ultimate
characterization for federal income tax purposes.  These differences reflect the
differing character of certain income items and net capital gains and losses for
financial  statement and tax purposes and may result in  reclassification  among
certain capital accounts.

     Use of  Estimates--The  preparation  of financial  statements in conformity
with  generally  accepted  accounting  principles  requires  management  to make
estimates and assumptions.  These estimates and assumptions  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.

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


                                               www.americancentury.com       21


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

     The Trust has entered into a Management  Agreement  with  American  Century
Investment  Management,  Inc.  (ACIM) that  provides  each Fund with  investment
advisory and management  services in exchange for a single,  unified  management
fee.  Expenses  excluded from this  agreement are  brokerage,  taxes,  portfolio
insurance,  interest,  fees and expenses of the Trustees who are not  considered
"interested persons" as defined in the Investment Company Act of 1940 (including
counsel fees) and extraordinary  expenses.  The annual rate at which this fee is
assessed is determined monthly in a two-step process: First, a fee rate schedule
is  applied  to the net  assets  of all of the  funds in the  Fund's  investment
category which are managed by ACIM (the "Investment  Category Fee"). The overall
investment objective of each Fund determines its Investment Category.  The three
investment  categories  are:  the  Money  Market  Fund  Category,  the Bond Fund
Category  and the Equity  Fund  Category.  The Funds are  included  in the Money
Market Fund Category. Second, a separate fee rate schedule is applied to the net
assets of all of the funds managed by ACIM (the "Complex  Fee").  The Investment
Category  Fee and the  Complex  Fee are then  added  to  determine  the  unified
management  fee rate.  The  management fee is paid monthly by each Fund based on
each  Fund's  aggregate  average  daily net  assets  during the  previous  month
multiplied by the monthly management fee rate.

     The annualized Investment Category Fee schedule is as follows:

     0.2700% of the first $1 billion 
     0.2270% of the next $1 billion 
     0.1860% of the next $3 billion 
     0.1690% of the next $5 billion 
     0.1580% of the next $15 billion 
     0.1575% of the next $25 billion
     0.1570% of the average daily net assets over $50 billion

     The annualized Complex Fee (for all Funds) schedule is as follows:

     0.3100% of the first $2.5 billion 
     0.3000% of the next $7.5 billion 
     0.2985% of the next $15 billion 
     0.2970% of the next $25 billion 
     0.2960% of the next $50 billion 
     0.2950% of the next $100 billion 
     0.2940% of the next $100 billion 
     0.2930% of the next $200 billion 
     0.2920% of the next $250 billion
     0.2910% of the next $500 billion
     0.2900% of the average daily net assets over $1,250 billion

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


22       1-800-345-2021


<TABLE>
<CAPTION>
Tax-Free Money Market--Financial Highlights
- --------------------------------------------------------------------------------

                   FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED AUGUST 31

                                         1998           1997           1996            1995             1994
PER-SHARE DATA
Net Asset Value,
<S>                                 <C>             <C>             <C>             <C>             <C>        
Beginning of Year ...............   $      1.00     $      1.00     $      1.00     $      1.00     $      1.00
                                    -----------     -----------     -----------     -----------     -----------
Income From Investment Operations
  Net Investment Income .........          0.03            0.03            0.03            0.03            0.02
                                    -----------     -----------     -----------     -----------     -----------
Distributions
  From Net Investment Income ....         (0.03)          (0.03)          (0.03)          (0.03)          (0.02)
                                    -----------     -----------     -----------     -----------     -----------
Net Asset Value, End of Year ....   $      1.00     $      1.00     $      1.00     $      1.00     $      1.00
                                    ===========     ===========     ===========     ===========     ===========
  Total Return(1) ...............          3.12%           3.17%           3.12%           3.31%           2.09%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ...........          0.50%           0.49%           0.49%           0.52%           0.50%
Ratio of Net Investment
Income to Average Net Assets ....          3.07%           3.10%           3.12%           3.28%           2.07%
Net Assets, End
of Year (in thousands) ..........   $   455,994     $   417,784     $   425,846     $   414,099     $   371,074
</TABLE>

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

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

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

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

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

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

See Notes to Financial Statements


                                               www.americancentury.com        23


<TABLE>
<CAPTION>
Municipal Money Market--Financial Highlights
- --------------------------------------------------------------------------------

                                         FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED AUGUST 31

                                         1998           1997            1996            1995             1994
PER-SHARE DATA
Net Asset Value,
<S>                                 <C>             <C>             <C>             <C>             <C>        
Beginning of Year ...............   $      1.00     $      1.00     $      1.00     $      1.00     $      1.00
                                    -----------     -----------     -----------     -----------     -----------
Income From Investment Operations
  Net Investment Income .........          0.03            0.03            0.03            0.03            0.02
                                    -----------     -----------     -----------     -----------     -----------
Distributions
  From Net Investment Income ....         (0.03)          (0.03)          (0.03)          (0.03)          (0.02)
                                    -----------     -----------     -----------     -----------     -----------
Net Asset Value, End of Year ....   $      1.00     $      1.00     $      1.00     $      1.00     $      1.00
                                    ===========     ===========     ===========     ===========     ===========
  Total Return(1) ...............          3.20%           3.15%           3.23%           3.35%           2.15%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ...........          0.50%           0.52%           0.53%           0.53%           0.51%
Ratio of Net Investment
Income to Average Net Assets ....          3.16%           3.10%           3.20%           3.31%           2.13%
Net Assets, End
of Year (in thousands) ..........   $   172,592     $   170,477     $   196,520     $   191,722     $   243,701
</TABLE>

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

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

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

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

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

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

                                              See Notes to Financial Statements


24       1-800-345-2021


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

To the Board of Trustees of the

American Century California Tax-Free and Municipal Funds and  Shareholders of
the American Century-Benham California Tax-Free Money Market Fund and the
American Century-Benham California Municipal Money Market Fund


In our opinion, the accompanying statements of assets and liabilities, including
the schedules of investments, and the related statements of operations,  changes
in net assets and the  financial  highlights  present  fairly,  in all  material
respects,  the  financial  position of the  American  Century-Benham  California
Tax-Free Money Market Fund and the American Century-Benham  California Municipal
Money Market Fund (two of the funds  constituting  American  Century  California
Tax-Free and Municipal Funds),  hereafter  referred to as the "Funds") at August
31, 1998, the results of each of their operations,  the changes in each of their
net assets and the financial  highlights for the year then ended,  in conformity
with generally accepted accounting  principles.  The statement of changes in net
assets for the year ended August 31, 1997 and the financial  highlights for each
of the four years in the period ended August 31, 1997 for each fund were audited
by other auditors, whose report, dated October 3, 1997, expressed an unqualified
opinion on those statements. These financial statements and financial highlights
(hereafter referred to as "financial  statements") are the responsibility of the
Funds'  management;  our  responsibility  is to  express  an  opinion  on  these
financial  statements  based on our  audits.  We  conducted  our audits of these
financial  statements in accordance with generally  accepted auditing  standards
which require that we plan and perform the audit to obtain reasonable  assurance
about whether the financial  statements  are free of material  misstatement.  An
audit includes examining,  on a test basis,  evidence supporting the amounts and
disclosures in the financial  statements,  assessing the  accounting  principles
used and  significant  estimates made by management,  and evaluating the overall
financial  statement  presentation.  We believe that our audits,  which included
confirmation  of  securities  at  August  31,  1998 by  correspondence  with the
custodian and brokers and the  application  of alternative  auditing  procedures
where  confirmations from brokers were not received,  provide a reasonable basis
for the opinion expressed above.


                                                      PricewaterhouseCoopers LLP


Kansas City, Missouri
October 14, 1998


                                               www.americancentury.com        25


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

INVESTMENT PHILOSOPHY AND POLICIES

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

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

     California Tax-Free Money Market and California Municipal Money Market seek
to provide  interest income exempt from both federal and California state income
taxes while  maintaining  a stable  share  price by  investing  in  high-quality
California  municipal money market  securities  with remaining  maturities of 13
months or less.

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

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 category for the California Tax-Free Money Market and Municipal
Money Market is:

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

CREDIT RATING GUIDELINES

     Bond credit quality (the issuer's  financial strength and the likelihood of
timely  payment of interest and  principal)  is a key factor in bond  investment
analysis.  Credit ratings issued by  independent  rating and research  companies
such as Standard & Poor's help quantify credit quality--the stronger the issuer,
the higher the credit  rating.  In turn,  credit  quality  and  ratings  greatly
influence  bond prices and  yields--high  ratings  mean  higher  prices and less
current income (yield) as compensation for risk.

     But credit ratings are subjective.  They reflect the opinions of the rating
agencies that issue them and are not absolute standards of quality. Furthermore,
high credit ratings do not guarantee good  investment  performance.  They do not
reflect the price  stability  of a municipal  security  when  economic or market
conditions change.

INVESTMENT TEAM LEADERS

PORTFOLIO MANAGER
     TODD PARDULA
CREDIT RESEARCH MANAGER
     STEVEN PERMUT


26       1-800-345-2021

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

RETURNS

* TOTAL  RETURN  figures  show the overall  percentage  change in the value of a
hypothetical  investment  in  the  fund  and  assume  that  all  of  the  fund's
distributions are reinvested.

* AVERAGE ANNUAL RETURNS  illustrate the annually  compounded returns that would
have produced the fund's cumulative total returns if the fund's  performance had
been  constant  over the  entire  period.  Average  annual  returns  smooth  out
variations  in a fund's  return;  they are not the same as  fiscal  year-by-year
results.  For  fiscal  year-by-year  returns,  please  refer  to the  "Financial
Highlights" on pages 23-24.

YIELDS

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

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

* 7-DAY  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 7-Day Current Yield.

INVESTMENT TERMS

* BASIS POINT--a basis point equals one  one-hundredth of a percentage point (or
0.01%). Therefore, 100 basis points equal one percentage point (or 1%).

STATISTICAL TERMINOLOGY

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

*  WEIGHTED  AVERAGE   MATURITY   (WAM)--a  measure  of  the  sensitivity  of  a
fixed-income  portfolio to interest rate changes. WAM indicates the average time
until the securities in the portfolio mature, weighted by dollar amount.

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

TYPES OF MUNICIPAL SECURITIES

* AMT PAPER--instruments  with income subject to the federal alternative minimum
tax.

* MUNICIPAL COMMERCIAL PAPER (CP)--high-grade  short-term securities backed by a
line of credit from a bank.

* MUNICIPAL NOTES--securities with maturities of two years or less.

* PUT  BONDS--long-term  securities  that can be "put back" (i.e.,  sold at face
value) to a specified buyer at a prearranged date.

* VARIABLE-RATE NOTES--securities that track market interest rates and stabilize
their market values using periodic (daily or weekly) interest rate adjustments.


                                               www.americancentury.com        27


Notes
- --------------------------------------------------------------------------------


28       1-800-345-2021


[inside back cover]

[right margin]

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

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

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

AUTOMATED INFORMATION LINE:
1-800-345-8765

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

FAX: 816-340-7962

INTERNET: www.americancentury.com


AMERICAN CENTURY CALIFORNIA TAX-FREE
AND MUNICIPAL FUNDS


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

THIS  REPORT AND THE  STATEMENTS  IT  CONTAINS  ARE  SUBMITTED  FOR THE  GENERAL
INFORMATION OF OUR  SHAREHOLDERS.  THE REPORT IS NOT AUTHORIZED FOR DISTRIBUTION
TO  PROSPECTIVE  INVESTORS  UNLESS  PRECEDED  OR  ACCOMPANIED  BY  AN  EFFECTIVE
PROSPECTUS.

(c) 1998 AMERICAN CENTURY SERVICES CORPORATION
FUNDS DISTRIBUTOR, INC.


[recycled logo]
Recycled


[back cover]

[40 Years]
Four Decades of Serving Investors
40 Years
American Century
1958-1998

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



9810                              (c)1998 American Century Services Corporation
SH-BKT-13910                                            Funds Distributor, Inc.
<PAGE>
[front cover]                                                    August 31, 1998

SEMIANNUAL REPORT
- -----------------
AMERICAN CENTURY

   [graphic of stairs]

BENHAM GROUP
- ------------------------------------
CALIFORNIA LIMITED-TERM TAX-FREE
CALIFORNIA INTERMEDIATE-TERM TAX-FREE
CALIFORNIA LONG-TERM TAX-FREE

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


A Note from the Founder
- --------------------------------------------------------------------------------

     On our 40th  anniversary,  I would  personally  like to express my profound
appreciation  for the  confidence  you have shown in  American  Century.  We are
grateful for the opportunity to manage your money,  and we will do our utmost to
continue to meet your expectations and justify your confidence in us.

     I  founded  American  Century  on  the  belief  that  if we  can  make  you
successful,  you, in turn,  will make us successful.  That is the principle that
will guide us in the future.

     Sincerely,
     /s/James E. Stowers


About our New Report Design
- --------------------------------------------------------------------------------

Why We Changed

We're trying hard to be reader-friendly.  Our reports contain a lot of very good
information, from fund statistics and financials to Q&A's with fund managers. We
hope the new design will make the reports more  interesting  and  understandable
while helping you keep abreast of your fund's strategy and performance.

What's New

The reports are designed to be attractive and easy to use whether you're reading
them in depth or just skimming.

     New features include:

* Larger type size in many sections.
* Brief explanations of the financial statements.
* More prominent graphs and charts.
* Quotes in the margins to highlight report content.

THE BOTTOM LINE.

The new design  actually  costs  slightly less than the old one. We  reallocated
costs and eliminated a cover letter and the envelope that  previously  came with
your  report  enclosed.  This not only saves  money,  but  reduces the number of
mailing pieces you receive.

The new  reports  also use  roughly  the same  amount  of paper as the old ones.
Previously,  paper was trimmed  and thrown  away to produce  the smaller  report
size.

We believe we've come up with a more interesting,  informative and user-friendly
publication.

We hope you enjoy it.

[left margin]

Benham Group

California Limited-Term Tax-Free
(BCSTX)

California Intermediate-Term Tax-Free
(BCITX)

California Long-Term Tax-Free
(BCLTX)

[40 Years logo]
Four Decades of Serving Investors
40 Years
American Century
1958-1998


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

     During the year ended August 31, 1998,  U.S.  interest rates fell as global
economic and financial  conditions  worsened.  Falling interest rates,  combined
with increased  demand,  sparked a rally in the municipal bond market.  Although
demand for municipal  bonds wasn't as strong as for Treasury bonds, it was still
enough to boost bond prices and put downward  pressure on yields. In California,
global  economic   weakness  began  to  infiltrate  the  strong  state  economy,
encouraging  investors  to  keep a  closer  watch  on the  financial  health  of
municipal bond issuers.

     Within  this  environment,   the  Benham  California  Tax-Free  Bond  funds
continued to perform well.  All three funds  provided  returns that exceeded the
average returns of their fund peers.

     The current market environment  illustrates the importance of a diversified
investment  portfolio.  While bonds  produced  positive  returns,  stock markets
worldwide suffered sharp declines.  Diversifying your assets among stocks, bonds
and money market funds can help  weatherproof  your portfolio against changes in
the economic or investment climate.

     On the corporate  front,  we have been  expanding the products and services
offered by our new American Century Brokerage.  Our brokerage operation offers a
wide range of investment options and features,  including individual securities,
mutual funds from hundreds of companies,  a Gold  MasterCard  ATM/debit  card, a
secured  credit  line,  and 24-hour  telephone  and  Internet  access.  Call our
Investor Services representatives or visit our Web site for more details.

     We also have a huge effort underway to prepare American  Century's computer
systems for the year 2000 (Y2K). A team of technology  professionals  is working
to address  Y2K-related  issues.  Through the rest of 1998 and 1999,  we will be
extensively  testing all of our systems,  including those involved with dividend
payments to verify the accuracy of dividend calculations and distributions.

     Finally,  we hope you like the new design of this report.  It's intended to
make the important information you need about your fund easier to find and read

     We appreciate your investment with American Century.

Sincerely,

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


[right margin]

               Table of Contents
   Report Highlights ......................................................    2
   Market Perspective .....................................................    3
   Municipal Credit Review ................................................    4
CALIFORNIA LIMITED-TERM TAX-FREE
   Performance Information ................................................    5
   Management Q&A .........................................................    6
   Portfolio at a Glance ..................................................    6
   Schedule of Investments ................................................    9
CALIFORNIA INTERMEDIATE-TERM TAX-FREE
   Performance Information ................................................   13
   Management Q&A .........................................................   14
   Portfolio at a Glance ..................................................   14
   Schedule of Investments ................................................   17
CALIFORNIA LONG-TERM TAX-FREE
   Performance Information ................................................   23
   Management Q&A .........................................................   24
   Portfolio at a Glance ..................................................   24
   Schedule of Investments ................................................   27
FINANCIAL STATEMENTS
   Statements of Assets and
   Liabilities ............................................................   31
   Statements of Operations ...............................................   32
   Statements of Changes
   in Net Assets ..........................................................   33
   Notes to Financial
   Statements .............................................................   34
   Financial Highlights ...................................................   37
   Report of Independent
   Accountants ............................................................   40
OTHER INFORMATION
   Background Information
      Investment Philosophy
      and Policies ........................................................   41
      Comparative Indices .................................................   41
      Lipper Rankings .....................................................   41
      Investment Team
      Leaders .............................................................   41
      Credit Rating
      Guidelines ..........................................................   41
   Glossary ...............................................................   42


                                                  www.americancentury.com      1


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

MARKET PERSPECTIVE

*   Municipal bonds posted moderate gains during the year ended August 31, 1998,
    as interest rates fell across the board.

*   A global economic  slowdown erased fears about inflation and created greater
    investor demand for bonds.

*   Although economic  conditions  favored bonds, a 47% increase in new issuance
    limited the price gains of municipal securities.

*   The gap between  Treasury and municipal bond yields narrowed to its tightest
    level  since  1986,  making  municipal  yields  extremely  attractive  on  a
    tax-adjusted basis.

CREDIT REVIEW

*   A robust state economy and healthy tax revenues  enhanced  municipal  credit
    conditions in California.

*   Strong job growth and consumer  spending  helped the state  produce a budget
    surplus.

*   Recent  slowing in  California's  economy has made us cautiously  optimistic
    about credit conditions going forward.

CALIFORNIA LIMITED-TERM TAX-FREE

*   The   fund   performed   well   compared   with   the   average   California
    short-intermediate fund while offering an attractive yield.

*   The fund's  slightly longer average  maturity--a  measure of the portfolio's
    sensitivity to interest  rates--compared  with its peers  contributed to the
    fund's solid performance.

*   Looking ahead, we will continue working with our strong credit research team
    and try to add value by modifying the portfolio's structure.

CALIFORNIA INTERMEDIATE-TERM TAX-FREE

*   The fund  performed  well,  outpacing  the  returns  of both its  peers  and
    benchmark while providing a competitive yield.

*   Taking  advantage of changes in the shape of the  municipal  yield curve was
    one of the more prominent ways we tried to enhance returns.

*   For  the  near  term,   we  will  be  looking  to  add   securities  in  the
    middle-maturity range as we begin to unwind our profitable barbell.

CALIFORNIA LONG-TERM TAX-FREE

*   The fund  offered  a higher  yield  and a better  one-year  return  than the
    average California municipal debt fund.

*   California  Long-Term  Tax-Free was  positioned to take advantage of falling
    interest rates, with a longer duration and an emphasis on discount bonds.

*   We invested mainly in high-quality bonds because we were getting very little
    extra yield for lower-quality securities.

*   We expect interest rates to continue to decline,  so we plan to maintain the
    fund's current positioning going forward.

[left margin]

            CALIFORNIA LIMITED-TERM
                   TAX-FREE
                    (BCSTX)
TOTAL RETURNS:                 AS OF 8/31/98
    6 Months                          2.53%*
    1 Year                             5.40%
NET ASSETS:                   $130.1 million
30-DAY SEC YIELD:                      3.45%
INCEPTION DATE:                       6/1/92


            CALIFORNIA INTERMEDIATE-
                 TERM TAX-FREE
                    (BCITX)
TOTAL RETURNS:                 AS OF 8/31/98
    6 Months                          2.88%*
    1 Year                             7.00%
NET ASSETS:                   $460.6 million
30-DAY SEC YIELD:                      3.70%
INCEPTION DATE:                      11/9/83


            CALIFORNIA LONG-TERM
                   TAX-FREE
                    (BCLTX)
TOTAL RETURNS:                 AS OF 8/31/98
    6 Months                          3.89%*
    1 Year                             9.25%
NET ASSETS:                   $325.2 million
30-DAY SEC YIELD:                      4.32%
INCEPTION DATE:                      11/9/83

* Not annualized.

See Total  Returns on pages 5, 13 and 23.  Investment  terms are  defined in the
Glossary on page 42.


2       1-800-345-2021


Market Perspective from Randall W. Merk
- --------------------------------------------------------------------------------
/photo of Randall W. Merk/
Randall W. Merk, director of fixed-income investing at American Century

SOLID MUNICIPAL BOND PERFORMANCE

     Municipal  securities  posted  solid gains during the year ended August 31,
1998. Interest rates declined and bond prices rose as a global economic slowdown
alleviated inflation fears.

     Municipal  bond  yields  fell  across the board,  with most of the  decline
occurring in late 1997.  Long-term  municipal bonds, which are most sensitive to
interest rate changes, reaped the biggest price gains as rates fell.

WEAKENING ECONOMIC CONDITIONS

     The catalyst for falling  interest  rates was a series of financial  crises
around the world that threatened to apply the brakes to global economic  growth.
Asia's financial  problems came to light in late 1997 and mushroomed in 1998. By
mid-1998, the contagion had spread to Russia and Latin America.

     One effect of these  crises was to calm fears that  inflationary  pressures
were  intensifying.  This was especially welcome in the U.S., where unemployment
was  at  a  28-year  low  and  consumer  spending  remained  very  robust.   The
tranquilizing  effect on  inflation  allowed  the  Federal  Reserve  to keep its
short-term interest rate barometer steady during the period.

     The global  economic  problems  wreaked havoc on stock  markets  worldwide.
Investors  grew  concerned  about the outlook  for  corporate  profits,  and the
ensuing stock market volatility created greater demand for bonds.

TREASURYS BEAT MUNICIPALS

     The biggest  benefactor  of the global  turmoil was the U.S.  Treasury bond
Randall W. Merk,  director of fixed-income  market.  Investors  fleeing volatile
markets looked for safe haven in Treasury  bonds.  This "flight to quality" sent
U.S.  interest  rates  down to  levels  not seen in three  decades--the  30-year
Treasury bond yield ended the period at an all-time low of 5.27%.

     The demand for municipal  bonds,  while remaining firm,  couldn't keep pace
with the growing appetite for Treasurys.  International  investors don't benefit
from the tax-exempt  status of municipal  securities,  so they prefer the higher
yields and greater liquidity offered by Treasurys.

     In addition, municipal bond issuance expanded over the past year as issuers
scrambled to take advantage of low interest rates. For the first eight months of
1998, new issue volume was up 47% compared with the previous year.

     As a result, Treasury bonds outperformed municipals, and the difference--or
spread--between  the  yields  of  Treasury  and  municipal  securities  narrowed
substantially (see the accompanying  chart). By the end of the period, the yield
spread between a 10-year Treasury and a 10-year  municipal bond was the tightest
it's been in 12 years.

      At these levels,  municipal bonds offer extremely  attractive  yields on a
tax-equivalent  basis.  As of August 31, an investor in the highest  federal tax
bracket could earn a tax-adjusted  yield of more than 7% on a 10-year  municipal
bond, well above the 5% yield on the 10-year Treasury.

[right margin]

"LONG-TERM MUNICIPAL BONDS, WHICH ARE MOST SENSITIVE TO INTEREST RATE CHANGES,
REAPED THE BIGGEST PRICE GAINS AS RATES FELL."

[line chart - data below]

10-YEAR TREASURY YIELDS VS. 10-YEAR AAA MUNICIPAL YIELDS

            10-Year Treasury      10-Year AAA Municipal
8/31/97           6.33%                 4.72%
9/30/97           6.10%                 4.59%
10/31/97          5.83%                 4.54%
11/30/97          5.85%                 4.59%
12/31/97          5.74%                 4.41%
1/31/98           5.51%                 4.34%
2/28/98           5.61%                 4.37%
3/31/98           5.65%                 4.45%
4/30/98           5.67%                 4.54%
5/31/98           5.55%                 4.44%
6/30/98           5.44%                 4.40%
7/31/98           5.49%                 4.42%
8/31/98           4.97%                 4.27%

Source: Bloomberg Financial Markets

"BY THE END OF THE PERIOD, THE YIELD SPREAD BETWEEN A 10-YEAR TREASURY AND A
10-YEAR MUNICIPAL BOND WAS THE TIGHTEST IT'S BEEN IN 12 YEARS."


                                               www.americancentury.com        3


California Municipal Credit Review
- --------------------------------------------------------------------------------

     Municipal credit  conditions in California  continued to improve during the
year ended  August 31,  1998.  The robust  state  economy  helped  increase  tax
revenues  for state and  local  governments.  However,  recent  economic  trends
indicate a slowing in California's  economy, so we are cautiously positive about
state credit conditions going forward.

CALIFORNIA ECONOMY IN HIGH GEAR

     Economic  growth in California was extremely  healthy during the past year.
The state  remains the hub of  leading-edge  technology  firms,  and it has also
benefited from vibrant tourism and entertainment industries.  Although the Asian
financial  crisis  began to hurt the state's  exports in late 1997,  other large
trading  partners--especially  Mexico and  Europe--picked up the slack,  helping
exports grow overall during the period.  Strong demand for housing fueled a boom
in the construction industry, which experienced the largest employment growth in
the state.

     California  jobs grew by 3.5%  during the first half of 1998,  compared  to
2.6%  nationally.  The  unemployment  rate in 15 counties  fell below 5%,  while
statewide unemployment hit its lowest level since the mid-1980s.  Job growth was
strongest in southern  California--Los  Angeles  County alone added 100,000 jobs
between  July  1997 and  July  1998,  and  four out of the five  fastest-growing
metropolitan areas are in the Southland.

     One of the biggest  benefactors of California's hearty economy has been the
state's general fund. The state budget is very economically  dependent,  relying
on  income  and  sales  tax  revenues  for  much  of  its  funding.   Thanks  to
higher-than-expected tax revenues, California erased its accumulated deficit and
produced a  surplus.  The state put a portion  of the  surplus  in an  emergency
reserve  fund for periods of economic  uncertainty;  the  remainder  allowed the
state to cut vehicle licensing fees and reinstate some tax credits.

CHANGES ON THE HORIZON

     Recently,  we've seen evidence that the state's economy has started to slow
down. Six of the state's 10 largest  foreign  trading  partners are in Asia, and
other crucial  export  markets--Mexico,  Canada,  Europe--are  also  struggling.
Although  foreign  exports  make up only 5% of the state's  economy,  California
businesses  also  compete  domestically  with  cheaper  imports  from  Asia  and
elsewhere.

     The San Francisco Bay Area, which is more  export-oriented and dominated by
technology  companies,  is already feeling the strain.  Many high-tech companies
are beginning to cut costs (and jobs) in order to remain competitive.

THE OUTLOOK

     After one of the most severe downturns in the state's  history,  California
has  experienced  explosive  economic  growth  over the last  few  years.  Going
forward,  however,  forecasts are calling for slower but more sustainable levels
of growth.

     As a result  of  fundamental  changes  over the past  decade,  the  state's
economy is more  diversified  and better able to withstand  economic  downturns.
However,  continued  dependence on  economically  sensitive  revenues leaves the
state's  recently  improved  financial  position   vulnerable  to  a  pronounced
slowdown.

     From a long-term perspective,  we're still positive on California's economy
and  credit  conditions,  but  we're  cautious  over the near  term  because  of
uncertainty  about the impact that the global  economic  crisis will have on the
state.

[left margin]

"ECONOMIC GROWTH IN CALIFORNIA WAS EXTREMELY HEALTHY DURING THE PAST YEAR."

[line chart - data below]

EMPLOYMENT GROWTH
              California           U.S.
'91             -3.5%             -1.5%
'92              0.1%              0.3%
'93             -0.8%              1.8%
'94              1.7%              3.1%
'95              0.6%              2.7%
'96              1.4%              2.1%
'97              3.9%              2.5%
'98              2.4%              2.6%

Source: Employment Development Department, Bureau of Labor Statistics

"CALIFORNIA JOBS GREW BY 3.5% DURING THE FIRST HALF OF 1998, COMPARED TO 2.6%
NATIONALLY."


4       1-800-345-2021


California Limited-Term Tax-Free--Performance
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
TOTAL RETURNS AS OF AUGUST 31, 1998
                                                      INCEPTION 6/1/92
                       CALIFORNIA LIMITED-   LEHMAN 3-YEAR   CALIF. SHORT-INTERM. MUNICIPAL DEBT FUNDS(2)
                         TERM TAX-FREE      MUNI BOND INDEX      AVERAGE RETURN    FUND'S RANKING
- ------------------------------------------------------------------------------------------------------
<S>                      <C>                   <C>               <C>                  <C>                  
6 MONTHS(1) ..............    2.53%             2.64%                2.21%              --
1 YEAR ...................    5.40%             5.76%                5.09%          6 OUT OF 12
- ------------------------------------------------------------------------------------------------------
AVERAGE ANNUAL RETURNS
3 YEARS ..................    4.90%             5.11%                4.61%          5 OUT OF 10
5 YEARS ..................    4.38%             4.90%                4.51%          4 OUT OF 4
LIFE OF FUND .............    4.85%            5.25%(3)              5.08%(3)       2 OUT OF 2(3)
</TABLE>

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

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

(3)  Since 6/30/92,  the date nearest the fund's inception for which return data
     are available.

See pages 41-42 for more information about returns,  the comparative  index, and
Lipper fund rankings.

[mountain chart - data below]

GROWTH OF $10,000 OVER LIFE OF FUND

Value on 8/31/98:
Limited-Term Tax-Free              $13,350
Lehman 3-Year Municipal Index      $13,712

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

DATE                ACCT VALUE           ACCT VALUE
6/30/92*             $10,000              $10,000
9/30/92              $10,202              $10,232
12/31/92             $10,337              $10,325
3/31/93              $10,538              $10,534
6/30/93              $10,675              $10,692
9/30/93              $10,833              $10,844
12/31/93             $10,948              $10,966
3/31/94              $10,800              $10,819
6/30/94              $10,861              $10,937
9/30/94              $10,955              $11,040
12/31/94             $10,881              $11,041
3/31/95              $11,206              $11,350
6/30/95              $11,432              $11,591
9/30/95              $11,596              $11,838
12/31/95             $11,785              $12,020
3/31/96              $11,814              $12,087
6/30/96              $11,905              $12,185
9/30/96              $12,072              $12,346
12/31/96             $12,248              $12,555
3/31/97              $12,292              $12,605
6/30/97              $12,533              $12,838
9/30/97              $12,748              $13,058
12/31/97             $12,902              $13,243
3/31/98              $13,031              $13,379
6/30/98              $13,154              $13,531
8/31/98              $13,350              $13,712

$10,000 investment made 6/30/92

The chart at left shows the growth of a $10,000  investment over the life of the
fund,  while the chart  below  shows the fund's  year-by-year  performance.  The
Lehman  3-Year  Municipal  Bond Index is provided for  comparison in each chart.
California  Limited-Term  Tax-Free's returns include operating expenses (such as
transaction costs and management fees) that reduce returns, while the returns of
the index do not. Past performance does not guarantee future results. Investment
return and principal value will fluctuate,  and redemption  value may be more or
less than original cost.

[bar chart - data below]

ONE-YEAR RETURNS OVER LIFE OF FUND (PERIODS ENDED AUGUST 31)

                           Limited-Term        Lehman 3-Year
                             Tax-Free         Municipal Index
06/30/92-08/31/92              1.47%              2.73%
08/31/92-08/31/93              6.15%              6.38%
08/31/93-08/31/94              1.90%              2.51%
08/31/94-08/31/95              5.33%              6.68%
08/31/95-08/31/96              3.87%              3.95%
08/31/96-08/31/97              5.42%              5.65%
08/31/97-08/31/98              5.40%              5.76%

* From 6/30/92 (the date nearest the fund's  inception  for which index data are
  available).


                                               www.americancentury.com        5


California Limited-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------

     An  interview  with Joel  Silva,  a  portfolio  manager  on the  California
Limited-Term Tax-Free fund investment team.

HOW DID  CALIFORNIA  LIMITED-TERM  TAX-FREE  PERFORM  FOR THE FISCAL  YEAR ENDED
AUGUST 31, 1998?

     The  fund   performed   well  compared   with  its  peers  while   slightly
underperforming  its benchmark.  For the year ended August 31, 1998,  California
Limited-Term  Tax-Free returned 5.40%, compared with the 5.09% average return of
the 12  "California  Short-Intermediate  Municipal Debt Funds" tracked by Lipper
Analytical  Services,  and the 5.76% return of the fund's benchmark,  the Lehman
3-Year  Municipal Bond Index.  (See the Total Returns table on the previous page
for other fund performance comparisons.)

     The fund  also  offered  an  attractive  yield  compared  with the  average
California  short-intermediate  fund. California  Limited-Term Tax-Free's 30-day
SEC yield on August 31, was 3.45%,  compared with the 3.01% average yield of its
peers.

WHY  DID  THE  FUND  PERFORM   WELL   COMPARED   WITH  THE  AVERAGE   CALIFORNIA
SHORT-INTERMEDIATE FUND?

     California   Limited-Term   Tax-Free's  slightly  longer  average  maturity
compared  with its peers was one  contributing  factor.  Average  maturity  is a
measure of the portfolio's  sensitivity to changes in interest rates. The longer
the average maturity,  the more the fund's share price gains when interest rates
fall, and the more the share price falls when rates rise. Conversely,  a shorter
average maturity means that a bond fund's share price fluctuates less when rates
change.  So, ideally,  you want to have a longer average  maturity when interest
rates are falling and a shorter average maturity when rates are rising.

     Because we were fairly  optimistic  about interest rates heading lower,  it
made sense to keep the portfolio's  average maturity  slightly long. As interest
rates  declined  during  much  of  the  fiscal  year,  California   Limited-Term
Tax-Free's  returns  were  enhanced  by  the  appreciation  of  the  longer-term
securities in the portfolio,  but more  importantly by the additional yield that
these  securities  captured.  Keep in  mind  that in a fund  such as  this,  the
majority of returns come from interest payments rather than price gains.  That's
why we work so closely with our research team to uncover  securities  that offer
attractive yields at reasonable prices.

WHAT OTHER MANAGEMENT TECHNIQUES DID YOU FOCUS ON DURING THE FISCAL YEAR?

     Using the municipal yield curve to the portfolio's advantage was one of the
more  prominent  ways we tried to enhance  returns.  (A yield curve  graphically
represents  the  relationship  between bond  maturities  and yields.  Yields are
represented along the vertical axis and maturity along the horizontal.)

     Usually, a longer-maturity municipal security will have a higher yield than
a shorter-maturity  one of the same credit quality.  That's mainly because there
is less interest rate  uncertainty in the near term than in the distant  future.
This difference in yields is referred to as the "spread".

     During  most  of the  12-month  period,  the  spread  between  longer-  and
shorter-term  securities  narrowed  as  the  yield  curve  flattened--yields  on
longer-term   municipals  fell,  while  shorter-term  ones  remained  relatively
constant.

[left margin]

"THE FUND OFFERED AN ATTRACTIVE YIELD COMPARED WITH THE AVERAGE CALIFORNIA
SHORT-INTERMEDIATE FUND."

YIELDS AS OF AUGUST 31, 1998

30-DAY SEC YIELD                3.45%

30-DAY TAX-EQUIVALENT YIELDS
  34.70% TAX BRACKET            5.28%
  37.42% TAX BRACKET            5.51%
  41.95% TAX BRACKET            5.94%
  45.22% TAX BRACKET            6.30%


PORTFOLIO AT A GLANCE
                               8/31/98           8/31/97
NUMBER OF SECURITIES             86                75
WEIGHTED AVERAGE
MATURITY                       3.6 YRS           3.5 YRS
AVERAGE DURATION               3.0 YRS           2.9 YRS
EXPENSE RATIO                   0.52%             0.49%

Investment terms are defined in the Glossary on page 42.


6      1-800-345-2021


California Limited-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WITH THOSE  BASICS IN MIND,  HOW DID YOU USE THE YIELD CURVE TO THE  PORTFOLIO'S
ADVANTAGE?

     Basically,  we looked at yield spreads to determine  which bond  maturities
were offering the best risk-adjusted  returns.  We then looked for securities in
those  ranges that  matched  our strict  credit  criteria  and added them to the
portfolio.

     When  making  these  purchases,   we  modified  the  portfolio's   maturity
structure--the ratio of shorter- to longer-term municipals.  During the majority
of the fiscal  year,  the fund was  "barbelled."  That means the  portfolio  was
heavily  invested in  securities  in the shorter and longer  parts of the fund's
maturity spectrum,  while underweighted in securities in the middle. We employed
the  barbell   structure  during  times  when  the  municipal  yield  curve  was
flattening--longer-term yields were falling faster than shorter-term ones.

     During  part of the fiscal  year,  we also  employed a "bullet"  structure,
which emphasizes  securities in the middle of the portfolio's  maturity spectrum
while  underweighting the ends. For instance,  we used this structure to enhance
returns early in 1998,  when an abundance of new municipal  issuance  caused the
difference between the yields of shorter- and longer-term  municipal  securities
to grow,  resulting in a steeper yield curve. A more bulleted structure has also
been effective  recently--the  yield curve has shown signs of steepening because
of an increase in retail demand for municipal securities.

IN ADDITION TO ADJUSTING THE PORTFOLIO'S MATURITY STRUCTURE, YOU MADE SOME
CHANGES TO ITS CREDIT QUALITY AND COUPON STRUCTURE. WHEN DID YOU MAKE THESE
CHANGES AND WHY?

     Most of the shift  occurred  recently,  when we modified the portfolio to a
more  bulleted  structure.  The  three- to  five-year  municipal  securities  we
purchased to  accomplish  the shift were mostly rated A. The result (as shown in
the table at right) was to decrease the securities rated AAA in the portfolio to
around 43% while increasing the percentage of those rated A to roughly 36%.

     We favored the A securities  at that time  because  they were  attractively
priced compared with higher-rated  securities,  which had rallied  comparatively
more, and therefore offered slightly less potential appreciation.

     Coupons  were also a  consideration.  Retail  sector  interest in municipal
securities  was  picking up, and such  investors  tend to favor the kinds of par
bonds (bonds trading at face value) that we purchased.  Therefore,  we felt that
the securities had the potential to appreciate nicely and also add slightly more
yield than  higher-rated  securities  would have. If interest  rates continue to
decline and the yield curve shows signs of  flattening  once again,  we may sell
some of the A securities in favor of  higher-rated  ones and shift the portfolio
to a more barbelled stance.

[right margin]

"WE LOOKED AT YIELD SPREADS TO DETERMINE WHICH BOND MATURITIES WERE OFFERING
THE BEST RISK-ADJUSTED RETURNS."

PORTFOLIO COMPOSITION BY CREDIT RATING
                   % OF FUND INVESTMENTS
                   AS OF             AS OF
                  8/31/98           2/28/98
AAA                 43%               49%
AA                  14%               18%
A                   36%               29%
BBB                  7%                4%


Ratings provided by Standard & Poor's.  See Credit Rating  Guidelines on page 41
for more information.


                                                 www.americancentury.com       7


California Limited-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

SPEAKING OF INTEREST RATES, WHERE DO YOU BELIEVE THEY ARE HEADED?

     The end of  September  marked  the  first  time the  Federal  Reserve  (the
Fed--the U.S.  central bank) has lowered  interest  rates in nearly three years.
The  question now is whether the Fed is poised for further rate cuts or not. Our
feeling is that the Fed may not be done lowering rates.  For one thing, the U.S.
economy is proving less resilient to overseas turmoil than was originally hoped,
and that has curtailed  domestic  growth.  Inflation is also crawling ahead at a
snail's pace, having risen only 1.6% annually for the first eight months of this
year.  Consumer  confidence  fell to its lowest  level in a year during  August,
which  could be a  harbinger  of slower  consumer  spending  (the main driver of
economic growth). To keep the U.S. economy from quietly slipping into recession,
the Fed may find itself  with  little  choice but to lower rates yet again in an
effort to stimulate growth.

     A glaring  uncertainty is whether all these events will actually  translate
into subdued consumer  spending.  If spending  strengthens  despite the overseas
economic  debacle,  further U.S. rate  reductions by the Fed may prove  entirely
unnecessary.

WHAT DOES THAT OUTLOOK MEAN FOR THE MUNICIPAL MARKET?

     Municipal  bonds have yet to appreciate as sharply as Treasury  securities.
That's largely  because of the surge in new municipal  issuance early this year,
and again in May. The good news is that issuance has  subsequently  tapered off.
Most of the securities that would have been released as the year progressed have
already been brought to market. From a supply standpoint,  that means the amount
of outstanding  securities should remain relatively  constant for the near term.
Another  factor  working in favor of municipal  securities is that they are very
attractively priced compared with Treasury securities. That has created a viable
opportunity  for market  participants to take advantage of the rally in interest
rates,  especially  since investors of almost all tax brackets are better off in
municipal securities from a tax-savings standpoint.

WITH THIS  OUTLOOK  IN MIND,  WHAT ARE YOUR  PLANS FOR  CALIFORNIA  LIMITED-TERM
TAX-FREE GOING FORWARD?

     We will probably keep the portfolio's  average maturity a bit long compared
with the average California short-intermediate municipal fund for the near term.
That should enhance returns if municipal bond yields continue to decline,  which
we believe they will. We will  continue  monitoring  the municipal  yield curve,
looking for  opportunities to add value by modifying the portfolio's  structure.
We will also continue  working with our strong  credit  research team to uncover
securities that we feel will improve the fund's yield and enhance returns.

[left margin]

"ANOTHER FACTOR WORKING IN FAVOR OF MUNICIPAL SECURITIES IS THAT THEY ARE VERY
ATTRACTIVELY PRICED COMPARED WITH TREASURY SECURITIES."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF AUGUST 31, 1998
Revenue                    49%
COPs/Leases                27%
GO                          9%
Prerefunded/ETM             7%
Land-Secured                7%
Other                       1%

AS OF FEBRUARY 28, 1998
Revenue                    45%
COPs/Leases                25%
Prerefunded/ETM            15%
GO                         10%
Land-Secured                4%
Other                       1%

Security types are defined on page 42.


8       1-800-345-2021


Limited-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------

AUGUST 31, 1998

Principal Amount                                                     Value
- --------------------------------------------------------------------------------
MUNICIPAL SECURITIES
               $1,235,000  Association of Bay Area
                              Governments Finance Auth.
                              COP, (Episcopal Homes
                              Foundation), 4.50%, 7/1/03          $ 1,259,379
                1,245,000  Association of Bay Area
                              Governments Finance Auth.
                              COP, (Rhoda Haas Goldman
                              Plaza), 5.00%, 5/15/07
                              (California Mortgage Insurance)       1,301,672
                2,450,000  Association of Bay Area
                              Governments Finance Auth.
                              Rev. COP, (Episcopal Homes
                              Foundation), 4.80%, 7/1/06            2,528,131
                1,000,000  Burbank Unified School District
                              GO, 4.50%, 8/1/02 (FGIC)              1,028,340
                  540,000  California Educational Facilities
                              Auth. Rev., (Los Angeles
                              College Chiropractic), 4.15%,
                              11/1/98                                 540,432
                  565,000  California Educational Facilities
                              Auth. Rev., (Los Angeles
                              College Chiropractic), 4.45%,
                              11/1/99                                 569,486
                  590,000  California Educational Facilities
                              Auth. Rev., (Los Angeles
                              College Chiropractic), 4.60%,
                              11/1/00                                 597,039
                1,145,000  California Educational Facility
                              Auth. Rev., (Pepperdine
                              University), 5.125%, 1/15/02
                              (AMBAC)                               1,194,567
                1,140,000  California Educational Facility
                              Auth. Rev., Series 1995 A,
                              (Pooled College & University
                              Projects), 4.55%, 12/1/99             1,154,923
                1,080,000  California Educational Facility
                              Auth. Rev., Series 1995 A,
                              (Pooled College & University
                              Projects), 4.95%, 12/1/02             1,124,604
                1,710,000  California Educational Facility
                              Auth. Rev., Series 1997 A,
                              (University of Southern
                              California), 5.60%, 10/1/01           1,806,102
                1,910,000  California Educational Facility
                              Auth. Rev., Series 1997 A,
                              (University of Southern
                              California), 5.60%, 10/1/03           2,067,040
                  395,000  California Educational Facility
                              Auth. Rev., Series 1997 B,
                              (Pooled College & University
                              Projects), 5.45%, 4/1/02                414,671
                  420,000  California Educational Facility
                              Auth. Rev., Series 1997 B,
                              (Pooled College & University
                              Projects), 5.55%, 4/1/03                446,729

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

                 $440,000  California Educational Facility
                              Auth. Rev., Series 1997 B,
                              (Pooled College & University
                              Projects), 5.65%, 4/1/04               $473,370
                  465,000  California Educational Facility
                              Auth. Rev., Series 1997 B,
                              (Pooled College & University
                              Projects), 5.75%, 4/1/05                507,041
                  940,000  California Educational Facilities
                              Auth. Rev., Series 1998 A,
                              (Pooled College & University
                              Projects), 4.85%, 7/1/04                956,657
                1,180,000  California Health Facilities
                              Finance Auth. Rev., (Valley
                              Presbyterian Hospital), 5.25%,
                              5/1/02 (MBIA)                         1,238,599
                1,400,000  California Health Facilities Finance
                              Auth. Rev., Series 1993 A, (St.
                              Francis Memorial Hospital),
                              5.00%, 11/1/98(1)                     1,403,836
                1,750,000  California Health Facilities Finance
                              Auth. Rev., Series 1993 A, (St.
                              Francis Memorial Hospital),
                              5.50%, 11/1/01(1)                     1,844,553
                1,000,000  California Health Facilities Finance
                              Auth. Rev., Series 1998 A,
                              (Casa De Las Campanas),
                              5.00%, 8/1/04 (California
                              Mortgage Insurance)                   1,043,890
                1,245,000  California Health Facilities Finance
                              Auth. Rev., Series 1998 A,
                              (Kaiser Permanente), 5.00%,
                              6/1/06 (FSA)                          1,316,563
                1,600,000  California Public Works Board
                              Lease Rev., Series 1995 A,
                              (Department of Justice Building),
                              5.50%, 5/1/00                         1,647,744
                3,000,000  California Public Works Board
                              Lease Rev., Series 1997 A,
                              (California Community Colleges),
                              5.00%, 4/1/02                         3,118,950
                1,065,000  California Public Works Board
                              Lease Rev., Series 1997 A,
                              (California Science Center),
                              4.50%, 10/1/04                        1,094,916
                1,025,000  California Special Districts
                              Association Finance Corp. COP,
                              Series 1998 GG, (Special
                              Districts Financing), 4.25%,
                              9/1/02 (FSA)                          1,044,065
                1,600,000  California State GO, 6.70%,
                              10/1/01                               1,738,928
                2,325,000  California State GO, 6.10%,
                              2/1/02 (AMBAC)(2)                     2,500,212
                1,000,000  California Statewide Community
                              Development Auth. Rev., Series
                              1998 A, (Sherman Oaks),
                              5.00%, 8/1/05 (AMBAC and
                              California Mortgage Insurance)        1,058,320

See Notes to Financial Statements


                                                www.americancentury.com       9


Limited-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)

AUGUST 31, 1998

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

               $4,825,000  Central Valley Financing Auth.
                              Cogeneration Project Rev.,
                              (Carson Ice General), 4.50%,
                              7/1/01 (MBIA)(3)                     $4,932,260
                3,175,000  Whittier Health Facility Rev.,
                              (Presbyterian Intercommunity
                              Hospital), 5.50%, 6/1/02
                              (MBIA)                                3,368,072
                1,100,000  Clovis Unified School District
                              COP, (Stadium & Relocatables
                              Financing), 4.375%, 7/1/04            1,122,660
                1,000,000  Encinitas Unified School District
                              COP, 5.00%, 9/1/01                    1,033,290
                1,000,000  Imperial Irrigation District COP,
                              (Electrical Systems), 6.70%,
                              11/1/98                               1,005,510
                1,775,000  Irvine Unified School District
                              Special Tax, (Community
                              Facilities District No. 86-1),
                              5.25%, 11/1/01 (AMBAC)                1,858,851
                1,400,000  Irvine Unified School District
                              Special Tax, (Community
                              Facilities District No. 86-1),
                              5.25%, 11/1/05 (AMBAC)                1,512,098
                3,500,000  Local Government Financing Joint
                              Powers Auth. Rev., Series
                              1988 A, (Anaheim
                              Redevelopment Agency), 7.95%,
                              9/1/98, Prerefunded at 102%
                              of Par (MBIA)(1)                      3,570,000
                1,000,000  Los Angeles Building Auth. Lease
                              Rev., 4.90%, 5/1/03                   1,042,890
                  955,000  Los Angeles Building Auth. Lease
                              Rev., Series 1995 A, 5.30%,
                              5/1/01                                  992,302
                1,230,000  Los Angeles Community
                              Redevelopment Agency
                              Financing Auth. Rev., Series
                              1998 E, (Pooled
                              Financing-Monterey), 4.50%,
                              9/1/02 (FSA)                          1,262,816
                2,100,000  Los Angeles Community
                              Redevelopment Agency Tax
                              Allocation, Series 1997 I,
                              (Central Business District),
                              5.00%, 11/15/01                       2,156,427
                1,800,000  Los Angeles Convention and
                              Exhibition Center COP, 6.60%,
                              8/15/99 (AMBAC)                       1,854,072
                1,000,000  Los Angeles Convention and
                              Exhibition Center COP, Series
                              1989 A, 7.30%, 8/15/99,
                              Prerefunded at 101.50% of Par(1)      1,051,700
                5,000,000  Los Angeles COP, (Equipment &
                              Real Estate Acquisition), 4.25%,
                              10/1/01                               5,069,850
                1,000,000  Los Angeles COP, (Equipment &
                              Real Estate Acquisition), 4.50%,
                              10/1/04                               1,024,830

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

               $1,265,000  Los Angeles County Capital
                              Asset Leasing Corporation Rev.,
                              5.625%, 12/1/03 (AMBAC)              $1,370,425
                1,000,000  Los Angeles County Metropolitan
                              Transportation Auth. Sales Tax
                              Rev., (Proposition C), 5.90%,
                              7/1/02 (AMBAC)                        1,076,600
                1,000,000  Los Angeles County Metropolitan
                              Transportation Auth. Sales Tax
                              Rev., Series 1995 A,
                              (Proposition C), 5.90%, 7/1/05
                              (AMBAC)                               1,114,140
                2,645,000  Los Angeles County Metropolitan
                              Transportation Auth. Sales Tax
                              Rev., Series 1997 A, 5.50%,
                              7/1/02 (MBIA)                         2,810,154
                2,360,000  Los Angeles County Public Works
                              Financing Auth. Lease Rev.,
                              Series 1996 A, 6.00%,
                              9/1/04 (MBIA)                         2,619,529
                1,500,000  Los Angeles County Public Works
                              Financing Auth. Lease Rev.,
                              Series 1997 A, (Master
                              Reference), 4.50%, 3/1/05
                              (FSA)                                 1,544,715
                2,000,000  Los Angeles County Public Works
                              Financing Auth. Rev., Series
                              1997 A, (Regional Park &
                              Open Space District), 5.00%,
                              10/1/01                               2,073,560
                1,015,000  Los Angeles County Schools
                              Regionalized Business Services
                              COP, Series 1997 C, 4.35%,
                              10/1/04 (FSA)                         1,037,675
                1,000,000  Los Angeles County Transportation
                              Community Sales Tax Rev.,
                              Series 1991 A, 6.30%, 7/1/01          1,067,740
                1,000,000  Los Angeles Rev. COP, 6.50%,
                              11/1/98                               1,005,180
                3,100,000  Los Angeles Unified School
                              District GO, Series 1997 A,
                              5.00%, 7/1/04 (FGIC)                  3,275,398
                1,000,000  Los Angeles Wastewater System
                              Rev., 6.70%, 2/1/00                   1,041,770
                1,250,000  Los Angeles Wastewater System
                              Rev., Series 1990 A, 6.80%,
                              2/1/01                                1,324,500
                1,000,000  Los Angeles Wastewater System
                              Rev., Series 1996 A, 6.00%,
                              2/1/03 (FGIC)                         1,088,430
                2,000,000  Metropolitan Water District of
                              Southern California Waterworks
                              Rev., 6.10%, 7/1/99                   2,045,140
                1,000,000  Metropolitan Water District of
                              Southern California Waterworks
                              Rev., 6.375%, 7/1/02                  1,088,160
                2,000,000  Modesto, Stockton, Redding
                              Public Power Agency San Juan
                              Project Rev., Series 1997 G,
                              5.50%, 7/1/01 (MBIA)                  2,098,360

                                              See Notes to Financial Statements


10      1-800-345-2021


Limited-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

               $1,365,000  Ontario Redevelopment Financing
                              Auth. Rev., (Center City
                              Cimarron), 5.70%, 8/1/01
                              (MBIA)                               $1,440,744
                1,500,000  Orange County Transportation
                              Sales Tax Rev., 5.50%, 2/15/01
                              (AMBAC)                               1,563,870
                1,160,000  Oroville Hospital Rev., Series
                              1997 A, (Oroville Hospital),
                              4.75%, 12/1/04 (California
                              Mortgage Insurance)                   1,204,045
                1,000,000  Riverside County Asset Leasing
                              Corporation Leasehold Rev.,
                              Series 1993 A, (Riverside
                              County Hospital), 5.90%,
                              6/1/02                                1,069,620
                1,000,000  Sacramento County Multifamily
                              Housing Rev., Issue 1985 B,
                              (Parcwood Apartments), 4.80%,
                              9/1/02 (Guaranteed:
                              Connecticut General Life
                              Insurance)                            1,022,180
                4,485,000  Sacramento Municipal Utility
                              District Electric Rev., Series
                              1993 D, 4.60%, 11/15/98(2)            4,495,854
                1,000,000  Sacramento Redevelopment
                              Agency Tax Allocation, Series
                              1998 A, (Merged Downtown
                              Redevelopment), 4.40%,
                              11/1/07 (FSA)                         1,018,160
                1,385,000  Sacramento Schools Insurance
                              Auth. Rev., Series 1993 C,
                              (Workers Compensation
                              Program), 5.75%, 6/1/03(1)            1,448,987
                2,000,000  San Bernardino County COP,
                              Series 1995 A, (Medical
                              Center),  5.20%, 8/1/04 
                              (MBIA)                                2,130,140 
                1,500,000  San Diego County Tax and Rev.
                              Anticipation Notes, 4.50%,
                              9/30/99                               1,517,055
                2,000,000  San Diego Unified School District
                              COP, Series 1997 A, (Capital
                              Projects-Phase XIII), 5.00%,
                              7/1/00                                2,047,900
                2,930,000  San Francisco Port Commission
                              Rev., 5.25%, 7/1/99                   2,972,690
                1,000,000  San Jose Redevelopment Agency
                              Tax Allocation, (Merged Area
                              Redevelopment), 5.00%,
                              8/1/05 (AMBAC)                        1,061,420
                1,085,000  Santa Barbara County COP,
                              4.90%, 3/1/01                         1,114,718
                1,250,000  Santa Barbara County Tax and
                              Rev. Anticipation Notes, 4.50%,
                              10/1/99                               1,263,587
                1,000,000  Southern California Public Power
                              Auth. Electric Rev., 6.75%,
                              7/1/99                                1,026,940

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

               $1,000,000  Southern California Public Power
                              Auth. Power Project Rev., Series
                              1997 A, (Palo Verde), 5.00%,
                              7/1/04 (FSA)                         $1,055,510
                1,075,000  Stockton Health Facilities Auth.
                              Rev., Series 1997 A, (Dameron
                              Hospital Association), 4.80%,
                              12/1/02                               1,103,165
                  725,000  Stockton Health Facilities Auth.
                              Rev., Series 1997 A, (Dameron
                              Hospital Association), 4.80%,
                              12/1/03                                 744,915
                1,040,000  Victor Valley Joint Union High
                              School District GO, 5.60%,
                              9/1/04 (MBIA)                         1,133,485
                1,000,000  Virgin Islands Water and Power
                              Auth. Electric System Rev.,
                              5.00%, 7/1/02                         1,028,530
                                                                 -------------
TOTAL MUNICIPAL SECURITIES--95.0%                                 129,023,378
                                                                 -------------
   (Cost $126,185,099)

SHORT-TERM MUNICIPAL SECURITIES
                2,000,000  California Pollution Control
                              Financing Auth. Rev., Series
                              1986 C, (Southern California
                              Edison), VRDN, 3.80%, 9/1/98          2,000,000
                1,200,000  Irvine Ranch California Water
                              District Rev., (Consolidated
                              Bonds), VRDN, 3.15%, 9/1/98
                              (LOC: Landesbank
                              Hessen-Thuringen Girozentrale)        1,200,000
                3,575,000  Richmond Joint Powers Financing
                              Port Auth. Term Lease Rev.,
                              VRDN, 3.35%, 9/1/98 (LOC:
                              Union Bank of California, N.A.)       3,575,000
                                                                 -------------
TOTAL SHORT-TERM
MUNICIPAL SECURITIES--5.0%                                          6,775,000
                                                                 -------------
  (Cost $6,775,000)

TOTAL INVESTMENT SECURITIES--100.0%                              $135,798,378
                                                                 =============
   (Cost $132,960,099)

See Notes to Financial Statements


                                                www.americancentury.com       11


Limited-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

NOTES TO SCHEDULE OF INVESTMENTS

AMBAC = AMBAC Assurance Corporation

COP = Certificates of Participation

FGIC = Financial Guaranty Insurance Co.

FSA = Financial Security Assurance Inc.

GO = General Obligation

LOC = Letter of Credit

MBIA = MBIA Insurance Corp.

VRDN = Variable Rate Demand Note.  Interest  reset date is indicated and used in
calculating the weighted  average  portfolio  maturity.  Rate shown is effective
August 31, 1998.

(1)  Escrowed  to  maturity  in U.S.  Government  securities  or state and local
government securities.

(2) Security,  or a portion  thereof,  has been segregated at the custodian bank
for a when-issued security.

(3) When-issued security.

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

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

                                              See Notes to Financial Statements


12      1-800-345-2021


California Interm.-Term Tax-Free--Performance
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
TOTAL RETURNS AS OF AUGUST 31, 1998
                                INCEPTION 11/9/83
                       CALIFORNIA INTERM.  LEHMAN 5-YEAR  CALIF. INTERMEDIATE MUNICIPAL DEBT FUNDS(2)
                        -TERM TAX-FREE       GO INDEX         AVERAGE RETURN    FUND'S RANKING
- ---------------------------------------------------------------------------------------------------
<S>                      <C>                  <C>              <C>                <C>                    
6 MONTHS(1) ..............   2.88%            2.91%              2.70%                --
1 YEAR ...................   7.00%            6.80%              6.79%           14 OUT OF 33
- ---------------------------------------------------------------------------------------------------
AVERAGE ANNUAL RETURNS
3 YEARS ..................   6.39%            5.75%              6.21%            9 OUT OF 25
5 YEARS ..................   5.45%            5.38%              5.32%            5 OUT OF 14
10 YEARS .................   6.99%            6.96%              7.11%            2 OUT OF 2
</TABLE>

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

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

See pages 41-42 for more information about returns,  the comparative  index, and
Lipper fund rankings.

[mountain chart - data below]

GROWTH OF $10,000 OVER 10 YEARS

Value on 8/31/98:
Intermediate-Term Tax-Free          $19,650
Lehman 5-Year GO Index              $19,589

                 Intermediate-Term     Lehman 5-Year
                     Tax-Free             GO Index
DATE                ACCT VALUE           ACCT VALUE
8/31/88              $10,000              $10,000
9/30/88              $10,111              $10,097
12/31/88             $10,228              $10,159
3/31/89              $10,205              $10,129
6/30/89              $10,637              $10,606
9/30/89              $10,715              $10,724
12/31/89             $11,040              $11,045
3/31/90              $11,099              $11,099
6/30/90              $11,337              $11,346
9/30/90              $11,419              $11,466
12/31/90             $11,811              $11,846
3/31/91              $12,044              $12,102
6/30/91              $12,232              $12,314
9/30/91              $12,664              $12,752
12/31/91             $13,037              $13,181
3/31/92              $12,973              $13,170
6/30/92              $13,412              $13,598
9/30/92              $13,766              $13,937
12/31/92             $13,961              $14,158
3/31/93              $14,422              $14,519
6/30/93              $14,810              $14,862
9/30/93              $15,286              $15,183
12/31/93             $15,455              $15,370
3/31/94              $14,840              $14,884
6/30/94              $14,956              $15,083
9/30/94              $15,099              $15,206
12/31/94             $14,880              $15,155
3/31/95              $15,662              $15,769
6/30/95              $15,989              $16,171
9/30/95              $16,438              $16,613
12/31/95             $16,894              $16,917
3/31/96              $16,779              $16,969
6/30/96              $16,891              $17,044
9/30/96              $17,229              $17,322
12/31/96             $17,611              $17,699
3/31/97              $17,601              $17,671
6/30/97              $18,106              $18,111
9/30/97              $18,564              $18,506
12/31/97             $18,926              $18,846
3/31/98              $19,091              $19,067
6/30/98              $19,293              $19,259
8/31/98              $19,650              $19,589

$10,000 investment made 8/31/88

The chart at left shows the growth of a $10,000  investment over 10 years, while
the chart below shows the fund's  year-by-year  performance.  The Lehman  5-Year
General  Obligation  Index is provided for comparison in each chart.  California
Intermediate-Term   Tax-Free's  returns  include  operating  expenses  (such  as
transaction costs and management fees) that reduce returns, while the returns of
the index do not. Past performance does not guarantee future results. Investment
return and principal value will fluctuate,  and redemption  value may be more or
less than original cost.

[bar chart - data below]

ONE-YEAR RETURNS OVER 10 YEARS (PERIODS ENDED AUGUST 31)

                         Intermediate-Term     Lehman 5-Year
                             Tax-Free            GO Index
08/31/88-08/31/89              7.28%              7.19%
08/31/89-08/31/90              6.16%              5.91%
08/31/90-08/31/91              9.74%             10.09%
08/31/91-08/31/92              9.18%              9.93%
08/31/92-08/31/93             10.42%              8.83%
08/31/93-08/31/94              1.11%              1.64%
08/31/94-08/31/95              7.09%              8.12%
08/31/95-08/31/96              4.79%              3.80%
08/31/96-08/31/97              7.39%              6.10%
08/31/97-08/31/98              7.00%              6.82%


                                               www.americancentury.com        13


California Intermediate-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------

     An interview with Colleen  Denzler,  a portfolio  manager on the California
Intermediate-Term Tax-Free fund investment team.

HOW DID CALIFORNIA  INTERMEDIATE-TERM TAX-FREE PERFORM FOR THE FISCAL YEAR ENDED
AUGUST 31, 1998?

     The fund  performed  well,  outpacing  the  returns  of both its  peers and
benchmark.   For  the  fiscal   year   ended   August   31,   1998,   California
Intermediate-Term  Tax-Free  returned  7.00%,  compared  with the 6.79%  average
return of the 33  "California  Intermediate  Municipal  Debt  Funds"  tracked by
Lipper Analytical  Services,  and the 6.80% return of the fund's benchmark,  the
Lehman  5-Year  General  Obligation  Index.  (See the Total Returns table on the
previous page for other fund performance comparisons.)

     The fund's  yield  also  compared  favorably  with the  average  California
intermediate fund. California  Intermediate-Term  Tax-Free's 30-day SEC yield on
August 31 was 3.70%, compared with the 3.69% average yield of its peers.

WHAT WAS BEHIND THE FUND'S FAVORABLE RETURNS VERSUS THE AVERAGE CALIFORNIA
INTERMEDIATE FUND?

     Duration  management was an important factor.  Duration is a measure of the
portfolio's  sensitivity  to  changes in  interest  rates and is one of the more
important tools we have to enhance  returns.  The longer the duration,  the more
the fund's share price gains when  interest  rates fall,  and the more the share
price falls when rates rise.  Conversely,  a shorter  duration means that a bond
fund's share price fluctuates less when rates change.  So, ideally,  you want to
have a longer  duration when interest  rates are falling and a shorter  duration
when rates are rising.

     We kept  California  Intermediate-Term  Tax-Free's  duration  slightly long
compared with its peers because we were fairly  optimistic  that interest  rates
would move lower, which they did for most of the period.

     Keep in mind, though, that any adjustments we make are done conservatively,
so the  fund's  duration  is  never  far  from  that of the  average  California
intermediate fund, even when we are bullish on rates.

WHAT OTHER MANAGEMENT TECHNIQUES DID YOU FOCUS ON DURING THE 12 MONTHS?

     Using the municipal yield curve to the portfolio's advantage was one of the
more  prominent  ways we tried to enhance  returns.  (A yield curve  graphically
represents  the  relationship  between bond  maturities  and yields.  Yields are
represented along the vertical axis and maturity along the horizontal.)

     Usually, a longer-maturity municipal security will have a higher yield than
a shorter-maturity  one of the same credit quality.  That's mainly because there
is less interest rate  uncertainty in the near term than in the distant  future.
This difference in yields is referred to as the "spread."

     During  most  of the  12-month  period,  the  spread  between  longer-  and
shorter-term  securities  narrowed  as the  yield  curve  flattened--  yields on
longer-term   municipals  fell,  while  shorter-term  ones  remained  relatively
constant. Early in July, however, the curve began to steepen, causing the spread
to widen as short-term yields fell dramatically.

[left margin]

"THE FUND PERFORMED WELL, OUTPACING THE RETURNS OF BOTH ITS PEERS AND
BENCHMARK."

YIELDS AS OF AUGUST 31, 1998

30-DAY SEC YIELD                    3.70%

30-DAY TAX-EQUIVALENT YIELDS
34.70% TAX BRACKET                  5.67%
37.42% TAX BRACKET                  5.91%
41.95% TAX BRACKET                  6.37%
45.22% TAX BRACKET                  6.75%


PORTFOLIO AT A GLANCE
                                   8/31/98           8/31/97
NUMBER OF SECURITIES                 151               142
WEIGHTED AVERAGE
MATURITY                           8.6 YRS           7.7 YRS
AVERAGE DURATION                   5.6 YRS           5.2 YRS
EXPENSE RATIO                       0.51%             0.48%

Investment terms are defined in the Glossary on page 42.


14       1-800-345-2021


California Intermediate-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WITH THOSE  BASICS IN MIND,  HOW DID YOU USE THE YIELD CURVE TO THE  PORTFOLIO'S
ADVANTAGE?

     Basically,  we looked at yield spreads to determine  which bond  maturities
were offering the best risk-adjusted  returns.  We then looked for securities in
those  ranges that  matched  our strict  credit  criteria  and added them to the
portfolio.  For  example,  in March we began  purchasing  longer-term  municipal
securities,  because they were attractively  priced. To keep the fund's duration
from extending too far out, we also added some short-term securities.

     Adding  these  securities   helped  us  modify  the  portfolio's   maturity
structure--the ratio of shorter- to longer-term  municipals.  Though the fund is
typically  "bulleted" (with the maturity of most holdings  clustered in one area
of the  yield  curve),  we  were  able  to  move  it  more  toward  a  "barbell"
configuration.  In a classic barbell structure,  a portfolio is heavily invested
in  securities in the shorter and longer parts of the fund's  maturity  spectrum
and  underweighted  in securities in the middle.  A barbell  structure  tends to
perform best when the municipal yield curve is moving from steep to flat, as was
the case during the  majority  of the  period--longer-term  interest  rates fell
faster than  shorter-term  rates. When the curve began to steepen again in early
July, as short-term  yields  plummeted,  the short-term  municipal paper that we
added performed very well.

SPEAKING OF INTEREST RATES, WHERE DO YOU BELIEVE THEY ARE HEADED?

     The end of September  marked the first time the Federal Reserve has lowered
interest  rates in nearly  three  years.  The question now is whether the Fed is
poised for further rate cuts or not. Our feeling is that the Fed may not be done
lowering  rates.  For one thing,  the U.S.  economy is proving less resilient to
overseas  turmoil than was  originally  hoped,  and that has curtailed  domestic
growth.  Inflation is also crawling  ahead at a snail's pace,  having risen only
1.6% annually for the first eight months of this year.  Consumer confidence fell
to its lowest  level in a year during  August,  which  could be a  harbinger  of
slower consumer spending (the main driver of economic growth).  To keep the U.S.
economy  from  quietly  slipping  into  recession,  the Fed may find itself with
little choice but to lower rates again in an effort to stimulate growth.

     However,  there are a few  glaring  uncertainties  that could  derail  this
outlook.  One is whether  Japan will  finally be able to pull its economy out of
the doldrums and the positive  repercussions  that could have on other economies
across the globe.  Another is whether all these events will  actually  translate
into  subdued  consumer  spending  here  at  home.  For  instance,  if  spending
strengthens despite the overseas economic debacle,  further U.S. rate reductions
by the Fed may prove entirely unnecessary.

[right margin]

"THE END OF SEPTEMBER MARKED THE FIRST TIME THE FEDERAL RESERVE HAS LOWERED
INTEREST RATES IN NEARLY THREE YEARS."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF AUGUST 31, 1998
Revenue                    43%
COPs/Leases                27%
GO                         13%
Prerefunded/ETM            11%
Land-Secured                5%
Other                       1%

AS OF FEBRUARY 28, 1998
Revenue                    44%
COPs/Leases                29%
Prerefunded/ETM            11%
GO                         11%
Land-Secured                5%
Other                       1%

Security types are defined on page 42.


                                               www.americancentury.com        15


California Intermediate-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHAT DOES THAT OUTLOOK MEAN FOR THE MUNICIPAL MARKET?

     Municipal  bonds have yet to appreciate as sharply as Treasury  securities.
That's largely  because of the surge in new municipal  issuance early this year,
and again in May. The good news is that issuance has  subsequently  tapered off.
Most of the securities that would have been released as the year progressed have
already been brought to market. From a supply standpoint,  that means the amount
of outstanding  securities should remain relatively  constant for the near term.
Another  factor  working in favor of municipal  securities is that they are very
attractively priced compared with Treasury securities. That has created a viable
opportunity  for market  participants to take advantage of the rally in interest
rates,  especially  since investors of almost all tax brackets are better off in
municipal securities from a tax-savings standpoint.

WITH THIS OUTLOOK IN MIND, WHAT ARE YOUR PLANS FOR CALIFORNIA  INTERMEDIATE-TERM
TAX-FREE GOING FORWARD?

     From a duration and structure standpoint, more of the same for now--we will
probably  keep  duration  slightly  long  compared  with the average  California
intermediate  municipal  fund and  maintain  the  portfolio's  fairly  barbelled
structure.  If yields  continue to  decline,  which we believe  they will,  this
should enhance returns.

     As always, we will continue working with our strong credit research team to
uncover  securities  that we feel will  improve  the  fund's  yield and  enhance
returns. We will also continue monitoring the municipal yield curve, looking for
opportunities  to add value by adding  securities that we feel offer  attractive
yields relative to their maturities.

[left margin]

"THE GOOD NEWS IS THAT ISSUANCE HAS TAPERED OFF. MOST OF THE SECURITIES THAT
WOULD HAVE BEEN RELEASED AS THE YEAR PROGRESSED HAVE ALREADY BEEN BROUGHT TO
MARKET."

PORTFOLIO COMPOSITION BY CREDIT RATING
                     % OF FUND INVESTMENTS
                    AS OF             AS OF
                   8/31/98           2/28/98
AAA                  64%               64%
AA                   14%               15%
A                    21%               20%
BBB                   1%                1%

Ratings provided by Standard & Poor's.  See Credit Rating  Guidelines on page 41
for more information.


16      1-800-345-2021


Interm.-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------

AUGUST 31, 1998

Principal Amount                                                     Value
- --------------------------------------------------------------------------------
MUNICIPAL SECURITIES
             $  8,845,000  Alameda County COP, (Santa
                              Rita Jail), 5.375%, 6/1/09
                              (MBIA)                                $9,584,619
                2,450,000  Association of Bay Area
                              Governments Financing Auth.
                              Rev. COP, (Episcopal Homes
                              Foundation), 4.80%, 7/1/06             2,528,131
                4,060,000  Burbank Redevelopment Agency
                              Tax Allocation, (West Olive),
                              6.50%, 12/1/01 (AMBAC)                 4,409,363
                1,175,000  California Educational Facility
                              Auth. Rev., (Santa Clara
                              University), 5.25%, 9/1/10
                              (MBIA)                                 1,254,313
                2,145,000  California Educational Facility
                              Auth. Rev., (University of San
                              Diego), 6.75%, 10/1/02
                              (MBIA)                                 2,323,271
                5,000,000  California Educational Facility
                              Auth. Rev., Series 1997 M,
                              (Stanford University), 5.25%,
                              12/1/99                                5,115,450
                1,500,000  California Health Facilities
                              Financing Auth. Rev., (Pomona
                              Valley Hospital Medical Center),
                              6.75%, 1/1/00, Prerefunded at
                              102% of Par (MBIA)(1)                  1,591,620
                1,045,000  California Health Facilities
                              Financing Auth. Rev., (Valley
                              Presbyterian Hospital), 5.25%,
                              5/1/03 (MBIA)                          1,106,665
                1,500,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1989 A, (Kaiser Permanente),
                              6.70%, 10/1/99                         1,550,295
                1,280,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1993 A, (St. Francis Memorial
                              Hospital), 5.25%, 11/1/99(1)           1,307,174
                1,660,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1993 A, (St. Francis Memorial
                              Hospital), 5.375%, 11/1/00(1)          1,721,852
                1,745,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1993 A, (St. Francis Memorial
                              Hospital), 5.625%, 11/1/02(1)          1,868,982
                1,560,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1993 A, (St. Francis Memorial
                              Hospital), 5.75%, 11/1/03,
                              Prerefunded at 102% of Par(1)          1,724,596
                3,145,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1995 A, (Insured Health
                              Facility), 6.00%, 7/1/04
                              (AMBAC)                                3,475,194

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

              $ 1,000,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1998 A, (Casa De Las
                              Campanas), 5.50%, 8/1/12
                              (California Mortgage Insurance)       $1,045,440
                3,250,000  California Public Works Board
                              Energy Efficiency Rev. COP,
                              Series 1991 A, (Pooled Project),
                              6.00%, 9/1/99                          3,330,925
                2,000,000  California Public Works Board
                              Lease Rev. COP, Series
                              1990 A, (University of
                              California), 6.90%, 9/1/00(2)          1,849,680
                4,520,000  California Public Works Board
                              Lease Rev. COP, Series
                              1992 A, (Archives Building
                              Project), 6.20%, 12/1/05
                              (AMBAC)                                5,147,783
                1,000,000  California Public Works Board
                              Lease Rev. COP, Series
                              1992 A, (Various University of
                              California Projects), 5.90%,
                              12/1/03 (AMBAC)                        1,097,640
                3,000,000  California Public Works Board
                              Lease Rev., Series 1992 A,
                              (Various California State
                              University Projects), 5.70%,
                              10/1/99                                3,072,360
                3,700,000  California Public Works Board
                              Lease Rev., Series 1993 D,
                              (California State Prisons),
                              5.25%, 6/1/08                          3,907,126
                3,000,000  California Public Works Board
                              Lease Rev., Series 1994 A,
                              (Various University of California
                              Projects), 6.15%, 11/1/09              3,334,950
                1,010,000  California Public Works Board
                              Lease Rev., Series 1997 A,
                              (California Science Center),
                              4.60%, 10/1/05                         1,045,199
                1,000,000  California Public Works Board
                              Lease Rev., Series 1997 D,
                              (Department of Corrections),
                              5.75%, 9/1/06 (MBIA)                   1,112,650
                1,000,000  California State Department of
                              Water Resource Center Valley
                              Project Rev., Series 1995 O,
                              4.75%, 12/1/17                           977,110
                2,000,000  California State Department of
                              Water Resource Central Valley
                              Project Rev., Series 1995 O,
                              4.75%, 12/1/18                         1,950,320
                4,795,000  California State Department Water
                              Resource Rev., (Central Valley
                              Project), Series 1992 J-2,
                              (Water System), 5.80%,
                              12/1/04                                5,294,303
                3,710,000  California State Franchise Tax
                              Board COP, 6.90%, 10/1/99,
                              Prerefunded at 102% of Par(1)          3,919,986

See Notes to Financial Statements


                                                www.americancentury.com      17


Interm.-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

              $10,000,000  California State GO, 6.50%, Value
                              3/1/02 (AMBAC)(3)                    $10,895,900
                2,400,000  California State GO, 6.00%,
                              9/1/03 (MBIA)                          2,637,816
                1,855,000  California State GO, 7.00%,
                              11/1/06 (FGIC)                         2,222,865
                3,000,000  California State GO, 4.75%,
                              9/1/18 (FSA)                           2,926,230
                1,470,000  California State Public Works
                              Board Lease Rev., Series
                              1996 C, (Department of
                              Corrections), 5.125%, 9/1/11
                              (MBIA)                                 1,547,690
                3,000,000  California State Universities and
                              Colleges Rev., 5.75%, 11/1/15
                              (FGIC)                                 3,256,500
                8,000,000  California Statewide Communities
                              Development Auth. COP,
                              (California Lutheran Homes),
                              5.375%, 11/15/06                       8,637,600
                2,385,000  California Statewide Communities
                              Development Auth. COP, (St.
                              Joseph Health System), 6.50%,
                              7/1/03(1)                              2,668,410
                2,545,000  Capistrano Unified Public
                              Financing Auth. Special Tax Rev.,
                              Series 1996 A, (First Lien),
                              6.00%, 9/1/06 (AMBAC)                  2,874,756
                2,075,000  Chabot Las Positas Community
                              College District COP, 5.50%,
                              12/1/10 (FSA)                          2,310,056
                1,465,000  City of Woodland Waste Water
                              System Refunding COP, 6.00%,
                              3/1/06 (AMBAC)                         1,646,675
                2,500,000  Contra Costa County Public
                              Facility COP, 7.45%, 6/1/00
                              (BIGI)                                 2,620,400
                1,065,000  Contra Costa County Water
                              District Rev., Series 1990 A,
                              7.00%, 10/1/00, Prerefunded
                              at 102% of Par(1)                      1,156,782
                7,935,000  Contra Costa Transportation Auth.
                              Sales Tax Rev., Series 1993 A,
                              6.00%, 3/1/05 (FGIC)                   8,857,126
                1,220,000  Coronado Community
                              Development Agency Tax
                              Allocation, 6.00%, 9/1/08 (FSA)        1,380,503
                2,570,000  East Bay Municipal Utility District
                              Water System Rev., 6.00%,
                              6/1/05                                 2,797,394
                3,590,000  East Bay Municipal Utility District
                              Water System Rev., 4.50%,
                              6/1/12                                 3,566,127
                2,000,000  Eastern Municipal Water District
                              Water and Sewer Rev. COP,
                              4.75%, 7/1/23 (FGIC)                   1,936,120
                3,365,000  Fremont Unified School District
                              Alameda County,
                              Series 1998 A, 4.70%, 
                              8/1/15 (FGIC)(4)                       3,323,510

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

              $ 5,000,000  Fremont Unified School District
                              Alameda County, Series 1998 A,
                              4.75%, 8/1/20 (FGIC)(4)               $4,857,200
                4,230,000  Fresno Special Tax, (Community
                              Facilities District No. 3), 4.75%,
                              9/1/05 (LOC: Rabobank
                              International)                         4,274,669
                1,285,000  Garden Grove Agency Community
                              Development Tax Allocation,
                              (Garden Grove Community),
                              5.30%, 10/1/02                         1,345,832
                1,320,000  Golden West Schools Financing
                              Auth. Rev., Series 1998 A,
                              5.90%, 8/1/01 (MBIA and
                              School District GO)                    1,401,233
                1,460,000  Golden West Schools Financing
                              Auth. Rev., Series 1998 A,
                              6.10%, 8/1/02 (MBIA and
                              School District GO)                    1,585,005
                1,225,000  Imperial Irrigation District COP,
                              (Electrical System), 5.20%,
                              11/1/09 (AMBAC)                        1,323,012
                7,350,000  Imperial Irrigation District COP,
                              (Electrical System), 6.50%,
                              11/1/07 (MBIA)                         8,664,548
                2,715,000  Irvine Unified School District
                              Special Tax, (Community
                              Facilities District No. 86-1),
                              5.50%, 11/1/10 (AMBAC)                 2,990,382
                1,750,000  Loma Linda Hospital Rev.,
                              (University Medical Center),
                              6.95%, 12/1/05 (AMBAC)                 1,854,440
                2,300,000  Los Angeles Airport Rev., Series
                              1995 A, 6.00%, 5/15/05
                              (FGIC)                                 2,571,630
                4,000,000  Los Angeles Capital Asset Lease
                              Rev. COP, 5.875%, 12/1/05
                              (AMBAC)                                4,466,360
                1,155,000  Los Angeles Convention and
                              Exhibition Center Auth. Lease
                              Rev. COP, Series 1993 A,
                              6.00%, 8/15/10 (MBIA)                  1,328,839
                4,315,000  Los Angeles COP, (Equipment &
                              Real Estate Acquisition
                              Program), 4.60%, 10/1/05               4,447,686
                4,000,000  Los Angeles County Correctional
                              Facility Project COP, 6.00%,
                              9/1/99 (MBIA)(1)                       4,105,040
                2,625,000  Los Angeles County Metropolitan
                              Transportation Auth. Rev., Series
                              1996 A, (Union Station), 5.10%,
                              7/1/10 (FSA)                           2,765,569
                1,000,000  Los Angeles County Metropolitan
                              Transportation Auth. Sales Tax
                              Rev., Series 1995 A,
                              (Proposition C), 5.90%, 7/1/06
                              (AMBAC)                                1,120,560

                                              See Notes to Financial Statements


18      1-800-345-2021


Interm.-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

              $ 6,175,000  Los Angeles County Metropolitan
                              Transportation Auth. Sales Tax
                              Rev., Series 1997 A,
                              (Proposition A), 5.25%, 7/1/12
                              (MBIA)                                $6,516,725
                1,000,000  Los Angeles County Public
                              Properties COP, 6.25%,
                              4/1/00 (BIGI)                          1,040,790
                5,000,000  Los Angeles County Public Works
                              Financing Auth. Lease Rev.,
                              Series 1997 A, (Master
                              Reference), 4.50%, 3/1/05
                              (FSA)                                  5,149,050
                2,625,000  Los Angeles County Sanitation
                              Districts Financing Auth. Rev.,
                              Series 1993 A, (Capital), 5.20%,
                              10/1/05                                2,817,098
                2,900,000  Los Angeles County
                              Transportation Commission
                              COP, Series 1992 B, 6.00%,
                              7/1/01                                 3,070,056
                4,665,000  Los Angeles County
                              Transportation Commission
                              COP, Series 1992 B, 6.20%,
                              7/1/03                                 5,114,100
                2,000,000  Los Angeles County
                              Transportation Commission
                              COP, Series 1992 B, 6.25%,
                              7/1/04                                 2,189,700
                2,500,000  Los Angeles County
                              Transportation Commission
                              Sales Tax Rev., Series 1991 A,
                              (Proposition A), 6.40%, 7/1/01,
                              Prerefunded at 102% of Par(1)          2,729,500
                3,515,000  Los Angeles County
                              Transportation Commission
                              Sales Tax Rev., Series 1992 A,
                              (Proposition C), 6.20%, 7/1/04         3,904,884
                3,765,000  Los Angeles County
                              Transportation Commission
                              Sales Tax Rev., Series 1992 A,
                              (Proposition C), 6.40%, 7/1/06         4,309,796
                1,000,000  Los Angeles County Wastewater
                              System Rev., Series 1990 B,
                              6.80%, 6/1/00, Prerefunded at
                              102% of Par(1)                         1,074,080
                2,045,000  Los Angeles County Wastewater
                              System Rev., Series 1991 A,
                              6.60%, 2/1/00 (MBIA)                   2,110,604
                4,780,000  Los Angeles County Wastewater
                              System Rev., Series 1992 B,
                              6.20%, 6/1/02, Prerefunded at
                              102% of Par (AMBAC)(1)                 5,278,745
                1,000,000  Los Angeles Department of
                              Water and Power Water Works
                              Rev., 6.30%, 4/15/06 (FGIC)            1,089,330
                4,685,000  Los Angeles Municipal
                              Improvement Corporation Rev.,
                              Series 1995 A, 6.00%, 2/1/03
                              (MBIA)                                 5,095,312

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

              $ 2,900,000  Los Angeles Unified School
                              District GO, Series 1997 A,
                              6.00%, 7/1/11 (FGIC)                  $3,335,696
                1,000,000  Los Angeles Unified School
                              District GO, Series 1997 A,
                              6.00%, 7/1/15 (FGIC)                   1,151,250
                7,190,000  Metropolitan Water District of
                              Southern California Rev., 6.50%,
                              7/1/01, Prerefunded at 102%
                              of Par(1)                              7,869,239
                1,000,000  Metropolitan Water District of
                              Southern California Rev.,
                              6.625%, 7/1/01, Prerefunded
                              at 102% of Par(1)                      1,097,810
                1,100,000  Mojave California Water Agency
                              Improvement District GO,
                              (Morongo Basin), 5.40%,
                              9/1/08 (FGIC)                          1,203,499
                1,000,000  Morgan Hill Redevelopment
                              Agency Tax Allocation, (Ojo De
                              Agua Community Development),
                              5.50%, 3/1/99                          1,010,280
                1,165,000  Ontario Redevelopment Financing
                              Auth. Local Agency Rev., Series
                              1995 A, 5.80%, 9/2/06 (FSA)            1,273,613
                1,250,000  Orange County Water District
                              COP, 7.00%, 8/15/00,
                              Prerefunded at 102% of Par(1)          1,355,288
                3,000,000  Orange County Water District
                              COP, Series 1997 A, 5.00%,
                              8/15/14 (MBIA)                         3,062,130
                1,330,000  Oxnard Harbor District Rev.,
                              7.00%, 8/1/04 (FSA)                    1,535,658
                1,955,000  Paramount Unified School District 
                              GO, Series 1998
                              A, 4.90%, 9/1/14 (FSA)                 1,982,839
               14,150,000  Puerto Rico Commonwealth GO,
                              4.50%, 7/1/23                         13,082,949
                3,500,000  Puerto Rico Commonwealth
                              Infrastructure Financing Auth.
                              Special Tax Rev., Series 1998 A,
                              5.50%, 7/1/08 (AMBAC)                  3,867,710
                5,000,000  Puerto Rico Electric Power Auth.
                              Rev., Series 1998 DD, 4.50%,
                              7/1/19 (FSA)                           4,737,300
                3,090,000  Puerto Rico Public Buildings Auth.
                              Rev., Series 1995 A, 6.25%,
                              7/1/09 (AMBAC)                         3,613,075
                1,000,000  Ramona Municipal Water District
                              COP, 6.90%, 10/1/01
                              (AMBAC)                                1,082,230
                1,060,000  Redding Joint Powers Financing
                              Auth. Electric System Rev.,
                              Series 1996 A, 6.25%, 6/1/07
                              (MBIA)                                 1,223,113
                1,010,000  Richmond Joint Powers Financing
                              Auth. Rev. COP, Series 1995 A,
                              5.30%, 5/15/06                         1,077,286

See Notes to Financial Statements


                                                www.americancentury.com      19


Interm.-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

              $ 2,000,000  Riverside County Asset Leasing
                              Corporation Leasehold Rev.,
                              Series 1993 A, (Riverside
                              County Hospital), 5.90%,
                              6/1/02                                $2,139,240
                2,080,000  Riverside County Public Financing
                              Auth. Special Tax Rev., Series
                              1995 A, 5.25%, 9/1/04
                              (MBIA)                                 2,228,366
                1,225,000  Riverside County Transportation
                              Commission Sales Tax Rev.,
                              Series 1993 A, 5.60%, 6/1/05
                              (AMBAC)                                1,343,274
                2,900,000  Riverside County Transportation
                              Commission Sales Tax Rev.,
                              Series 1993 A, 5.70%, 6/1/06
                              (AMBAC)                                3,212,301
                1,025,000  Rocklin Unified School District
                              Community Facility Special Tax
                              Rev., No. 1, 5.20%, 9/1/09
                              (MBIA)                                 1,098,913
                2,600,000  Sacramento County Multifamily
                              Housing Rev., Issue 1985 B,
                              (Parcwood Apartments), 4.80%,
                              9/1/02 (Guarantee:
                              Connecticut General Life
                              Insurance)                             2,657,668
                1,000,000  Sacramento Municipal Utility
                              District Electric Rev., Series
                              1992 A, 6.25%, 8/15/10
                              (MBIA)                                 1,173,600
                5,710,000  Sacramento Municipal Utility
                              District Electric Rev., Series
                              1992 C, 5.75%, 11/15/07
                              (MBIA)                                 6,189,583
                3,500,000  Sacramento Municipal Utility
                              District Electric Rev., Series
                              1994 H, 5.75%, 1/1/11
                              (MBIA)                                 3,798,655
                4,230,000  Sacramento Municipal Utility
                              District Electric Rev., Series
                              1997 L, 5.00%, 7/1/10
                              (AMBAC)                                4,446,576
                1,205,000  Saddleback Valley Unified School
                              District Public Financing Special
                              Tax Rev., 6.00%, 9/1/11 (FSA)          1,387,871
                5,000,000  San Bernardino County COP,
                              Series 1995 A, (Medical
                              Center), 5.75%, 8/1/07 (MBIA)          5,596,900
                1,080,000  San Bernardino Municipal Water
                              Department Sewer Rev. COP,
                              4.75%, 2/1/14 (FGIC)                   1,080,464
                2,000,000  San Diego County COP, (Central
                              Jail), 5.00%, 10/1/10
                              (AMBAC)                                2,090,360
                1,500,000  San Diego County Regional
                              Transportation Commission
                              Sales Tax Rev., Series 1989 A,
                              7.75%, 4/1/99(1)                       1,538,145

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

              $ 7,200,000  San Diego County Water Auth.
                              Rev. COP, Series 1991 A,
                              6.125%, 5/1/03                        $7,733,376
                4,400,000  San Diego County Water Auth.
                              Rev. COP, Series 1991 A,
                              6.40%, 5/1/01, Prerefunded at
                              102% of Par(1)                         4,786,232
                5,340,000  San Diego County Water Auth.
                              Rev. COP, Series 1997 A,
                              4.75%, 5/1/20                          5,181,402
                3,505,000  San Diego Regional
                              Transportation Commission
                              Sales Tax Rev., Series 1992 A,
                              5.50%, 4/1/04 (FGIC)                   3,782,911
                5,175,000  San Diego Regional
                              Transportation Commission
                              Sales Tax Rev., Series 1992 A,
                              5.50%, 4/1/05 (FGIC)                   5,634,281
                4,000,000  San Diego Regional
                              Transportation Commission
                              Sales Tax Rev., Series 1994 A,
                              6.00%, 4/1/04 (FGIC)                   4,416,600
                3,800,000  San Francisco Bay Area Rapid
                              Transit District Sales Tax Rev.,
                              4.75%, 7/1/23 (AMBAC)                  3,678,628
                1,000,000  San Francisco Bay Area Rapid
                              Transit District Sales Tax Rev.,
                              5.35%, 7/1/07 (FGIC)                   1,076,090
                1,035,000  San Francisco City and County
                              Airport Commission International
                              Airport Rev., (Second
                              Series-Issue 15B), 4.70%,
                              5/1/15 (MBIA)                          1,022,332
                3,555,000  San Francisco City and County
                              Airport Commission International
                              Airport Rev., (Second
                              Series-Issue 18B), 4.75%,
                              5/1/17 (FGIC)                          3,487,882
                3,000,000  San Francisco City and County
                              Finance Corporation Lease Rev.,
                              Series 1998 I, (Citywide
                              Emergency Radio), 4.00%,
                              4/1/02 (FSA)                           3,029,370
                7,000,000  San Francisco City and County 
                              GO, Series 1, 4.50%, 6/15/05
                              (FGIC)                                 7,224,840
                1,605,000  San Francisco City and County
                              Public Utilities Commission
                              Water Rev., Series 1996 A,
                              5.00%, 11/1/11                         1,673,132
                3,405,000  San Francisco Port Commission
                              Rev., 5.625%, 7/1/02                   3,606,474
                3,950,000  San Jose Financing Auth. Rev.
                              COP, (Convention Center),
                              6.00%, 9/1/05                          4,248,976
                4,580,000  San Jose Financing Auth. Rev.
                              COP, Series 1993 A,
                              (Convention Center), 6.10%,
                              9/1/06                                 4,904,447

                                              See Notes to Financial Statements


20      1-800-345-2021


Interm.-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

              $ 3,875,000  San Jose Redevelopment Agency
                              Tax Allocation, Series 1992 A,
                              (Merged Area Redevelopment),
                              6.00%, 8/1/02 (MBIA)(1)               $4,174,576
                1,620,000  San Mateo County Joint Powers
                              Auth. Lease Rev., Series
                              1997 A, 4.875%, 7/15/11
                              (FSA)                                  1,671,548
                4,585,000  San Mateo County Transportation
                              District Sales Tax Rev., Series
                              1993 A, 5.00%, 6/1/11
                              (MBIA)                                 4,828,051
                1,015,000  Santa Ana Police Administration
                              COP, Series 1994 A, 5.50%,
                              7/1/07 (MBIA)                          1,100,981
                1,510,000  Santa Clara County Financing
                              Auth. Lease Rev., Series
                              1997 A, 6.00%, 11/15/12
                              (AMBAC)                                1,734,552
                1,000,000  Signal Hill California
                              Redevelopment Agency Tax
                              Allocation, Series 1990 B,
                              7.40%, 10/1/00, Prerefunded
                              at 100% of Par(1)                      1,077,120
                1,785,000  South Sutter Water District
                              Hydroelectric Refunding Rev.,
                              6.80%, 8/1/01 (FGIC)                   1,871,465
                3,090,000  Southern California Public Power
                              Auth. Rev., (Transmission),
                              5.625%, 7/1/03 (MBIA)                  3,333,152
                2,000,000  Southern California Public Power
                              Auth. Rev., 6.75%, 7/1/00              2,108,680
                3,000,000  Southern California Public Power
                              Auth. Rev., 6.75%, 7/1/01              3,210,270
                4,065,000  Southern California Rapid Transit
                              District COP, (Workers
                              Compensation), 6.20%, 7/1/02
                              (MBIA)                                 4,378,167
                5,000,000  Southern California Rapid Transit
                              District COP, (Workers
                              Compensation), 6.40%, 7/1/04
                              (MBIA)                                 5,391,300
                1,500,000  Southern California Rapid Transit
                              District COP, (Workers
                              Compensation), 6.50%, 7/1/07
                              (MBIA)                                 1,620,690
                2,000,000  Stanislaus County Refunding
                              COP, 5.50%, 5/1/06 (MBIA)              2,184,560
                1,000,000  Stockton-East Water District COP,
                              Series 1997 A, (1990), 4.75%,
                              4/1/17 (AMBAC)                           978,810
                1,150,000  Taft Public Financing Auth. Lease
                              Rev. COP, Series 1997 A,
                              (Community Correctional
                              Facility), 5.50%, 1/1/06               1,232,201
                1,950,000  University of California Rev.,
                              (University of California Medical
                              Center), 5.60%, 7/1/09
                              (AMBAC)                                2,130,257

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

              $ 1,985,000  University of California Rev.,
                              Series 1994 C, (Multiple
                              Purpose), 4.75%, 9/1/16
                              (AMBAC)                               $1,950,818
                2,340,000  Virgin Islands Water and Power
                              Auth. Electric System Rev.,
                              5.25%, 7/1/05                          2,450,517
                2,510,000  Watsonville California Hospital
                              Insured Rev., Series 1996 A,
                              (Watsonville Community
                              Hospital), 5.45%, 7/1/03
                              (California Mortgage Insurance)        2,667,803
                3,980,000  Whittier California Health Facility
                              Rev., (Presbyterian
                              Intercommunity), 6.00%,
                              6/1/06 (MBIA)                          4,481,678
                                                                 ---------------
TOTAL MUNICIPAL SECURITIES--98.9%                                  458,108,282
                                                                 ---------------
   (Cost $434,424,344)

SHORT-TERM MUNICIPAL SECURITIES
                3,000,000  California Health Facilities 
                              Financing Auth. Rev.,
                              Series 1996 B, VRDN, 3.15%, 
                              9/1/98 (AMBAC) (SBBPA:
                              ABN Amro Bank N.V.)                    3,000,000
                1,800,000  California State Economic
                              Development Financing Auth.
                              Rev., Series 1998 B, (California
                              Independent System), VRDN,
                              3.20%, 9/1/98 (LOC: Bank of
                              America N.T. & S.A.)                   1,800,000
                  225,000  Richmond Joint Powers Financing
                              Port Auth. Term Lease Rev.,
                              VRDN, 3.35%, 9/1/98 (LOC:
                              Union Bank of California, N.A.)          225,000
                                                                 ---------------
TOTAL SHORT-TERM
MUNICIPAL SECURITIES--1.1%                                           5,025,000
                                                                 ---------------
   (Cost $5,025,000)

TOTAL INVESTMENT SECURITIES--100.0%                               $463,133,282
                                                                 ===============
   (Cost $439,449,344)

See Notes to Financial Statements


                                                www.americancentury.com      21


Interm.-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

NOTES TO SCHEDULE OF INVESTMENTS

AMBAC = AMBAC Assurance Corporation

BIGI = Bond Investor's Guaranty

COP = Certificates of Participation

FGIC = Financial Guaranty Insurance Co.

FSA = Financial Security Assurance Inc.

GO = General Obligation

LOC = Letter of Credit

MBIA = MBIA Insurance Corp.

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
August 31, 1998.

(1)  Escrowed  to  maturity  in U.S.  Government  securities  or state and local
government securities.

(2) Security is a zero-coupon  municipal bond. The yield to maturity at purchase
is indicated.  Zero-coupon  securities  are purchased at a substantial  discount
from their value at maturity.

(3) Security,  or a portion  thereof,  has been segregated at the custodian bank
for when-issued securities.

(4) When-issued security.

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

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

                                              See Notes to Financial Statements


22      1-800-345-2021


California Long-Term Tax-Free--Performance
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
TOTAL RETURNS AS OF AUGUST 31, 1998
                                                       INCEPTION 11/9/83
                       CALIFORNIA LONG-TERM  LEHMAN LONG-TERM  CALIFORNIA MUNICIPAL DEBT FUNDS(2)
                             TAX-FREE         MUNI BOND INDEX   AVERAGE RETURN   FUND'S RANKING
- -----------------------------------------------------------------------------------------------
<S>                      <C>                    <C>                 <C>              <C>                  
6 MONTHS(1) .................  3.89%               4.07%            3.27%              --
1 YEAR ......................  9.25%              10.51%            8.51%         20 OUT OF 104
- -----------------------------------------------------------------------------------------------
AVERAGE ANNUAL RETURNS
3 YEARS .....................  8.57%               9.52%            7.72%         14 OUT OF 90
5 YEARS .....................  6.36%               7.08%            5.83%         12 OUT OF 58
10 YEARS ....................  8.33%               9.44%            7.90%          7 OUT OF 30
</TABLE>

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

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

See pages 41-42 for more information about returns,  the comparative  index, and
Lipper fund rankings.

[mountain chart - data below]

GROWTH OF $10,000 OVER 10 YEARS

Value on 8/31/98:
Long-Term Tax-Free              $22,265
Lehman Long-Term Municipal      $24,850

                    Long-Term         Lehman Long-Term
                     Tax-Free         Municipal Index
DATE                ACCT VALUE           ACCT VALUE
8/31/88              $10,000              $10,000
9/30/88              $10,136              $10,227
12/31/88             $10,385              $10,529
3/31/89              $10,500              $10,634
6/30/89              $11,071              $11,370
9/30/89              $10,997              $11,310
12/31/89             $11,399              $11,788
3/31/90              $11,388              $11,813
6/30/90              $11,656              $12,116
9/30/90              $11,528              $12,018
12/31/90             $12,152              $12,638
3/31/91              $12,363              $12,928
6/30/91              $12,634              $13,257
9/30/91              $13,185              $13,855
12/31/91             $13,584              $14,350
3/31/92              $13,576              $14,400
6/30/92              $14,129              $15,034
9/30/92              $14,442              $15,444
12/31/92             $14,692              $15,816
3/31/93              $15,329              $16,508
6/30/93              $15,937              $17,189
9/30/93              $16,581              $17,877
12/31/93             $16,712              $18,150
3/31/94              $15,758              $16,697
6/30/94              $15,854              $16,818
9/30/94              $15,947              $16,886
12/31/94             $15,624              $16,501
3/31/95              $16,738              $18,143
6/30/95              $17,025              $18,558
9/30/95              $17,557              $19,063
12/31/95             $18,717              $20,340
3/31/96              $18,184              $19,809
6/30/96              $18,335              $20,043
9/30/96              $18,864              $20,664
12/31/96             $19,389              $21,239
3/31/97              $19,271              $21,054
6/30/97              $19,989              $21,993
9/30/97              $20,681              $22,811
12/31/97             $21,277              $23,637
3/31/98              $21,470              $23,911
6/30/98              $21,798              $24,358
8/31/98              $22,265              $24,850

$10,000 investment made 8/31/88

The chart at left shows the growth of a $10,000  investment over 10 years, while
the chart below shows the fund's year-by-year performance.  The Lehman Long-Term
Municipal  Bond Index is  provided  for  comparison  in each  chart.  California
Long-Term  Tax-Free's  returns include  operating  expenses (such as transaction
costs and management  fees) that reduce returns,  while the returns of the index
do not. Past performance does not guarantee  future results.  Investment  return
and principal  value will  fluctuate,  and redemption  value may be more or less
than original cost.

[bar chart - data below]

ONE-YEAR RETURNS OVER 10 YEARS (PERIODS ENDED AUGUST 31)

                             Long-Term       Lehman Long-Term
                             Tax-Free        Municipal Index
08/31/88-08/31/89             10.39%             13.44%
08/31/89-08/31/90              4.66%              6.11%
08/31/90-08/31/91             12.26%             13.47%
08/31/91-08/31/92             10.58%             12.60%
08/31/92-08/31/93             14.02%             14.76%
08/31/93-08/31/94             -0.78%             -2.05%
08/31/94-08/31/95              7.21%              9.43%
08/31/95-08/31/96              6.77%              6.88%
08/31/96-08/31/97              9.70%             11.26%
08/31/97-08/31/98              9.25%             10.51%


                                                www.americancentury.com      23


California Long-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------

     An  interview  with Dave  MacEwen,  a portfolio  manager on the  California
Tax-Free and Municipal funds investment team.

HOW DID THE FUND PERFORM DURING THE FISCAL YEAR ENDED AUGUST 31, 1998?

     California  Long-Term Tax-Free performed quite well, posting a 9.25% return
compared with the 8.51% average  return of the 104  "California  Municipal  Debt
Funds" tracked by Lipper Analytical Services.  The fund's one-year return placed
it in the top 20% of its peer group.  Over the last 10 years, the fund's returns
consistently  placed  it in the top  third of the  peer  group.  (See the  Total
Returns table on the previous page for other fund performance comparisons.)

     The fund also  produced  more  current  income than the average  California
municipal fund. The fund's 30-day SEC yield as of August 31 was 4.32%,  compared
with the 3.95% yield of the average California municipal fund.

HOW DID CALIFORNIA LONG-TERM TAX-FREE OUTPACE ITS COMPETITORS?

     One factor was California  Long-Term  Tax-Free's  below-average  management
fee, which gave us a leg up on our peers. The fund's coupon  structure  provided
another  important  advantage.  As a quick review, a bond's coupon refers to the
amount of interest it pays.  Discount bonds trade below face value because their
interest rates are lower than the prevailing market interest rate; premium bonds
trade at prices  above face value  because  their  coupons  are higher  than the
prevailing market interest rate.

     Throughout the past year, we continually swapped into lower-coupon discount
bonds and out of  higher-coupon  premium bonds.  First,  we sold some bonds with
coupons of 5.50% and replaced them with 5.25% bonds. As rates declined  further,
we replaced many of our 5.25% bonds with 5.00% bonds and, ultimately, with 4.75%
bonds.  As a result of these trades,  the fund's average coupon dropped to 5.58%
at the end of the period, from 6.05% six months earlier.

 WHAT WAS THE  THINKING  BEHIND  THE FOCUS ON  DISCOUNT  BONDS,  AND HOW DID THE
STRATEGY PAN OUT?

     Our view was that interest  rates would fall and that discount  bonds would
be less likely than premium bonds to be called  (refinanced by the issuer before
maturity). Like homeowners,  municipal issuers often refinance--or "call"--their
older,  higher-rate  debt  when  interest  rates  fall.  If a  bond  is  called,
bondholders  often have to forfeit  high-yielding  older bonds and  reinvest the
proceeds at lower interest rates.

     Investing in discount  bonds helps to guard against these  unwanted  calls.
Issuers of discount  bonds don't have much  incentive  to  refinance  bonds that
carry interest rates lower than prevailing  interest  rates.  Issuers of premium
bonds,  on the other hand,  can save money  because  their debt carries  coupons
above  prevailing  rates.  As a result of their  resistance  to untimely  calls,
discount  bonds tend to perform  better than premium bonds when  interest  rates
fall.

     While the fund's  increased  stake in  discount  bonds  served us well when
interest rates fell substantially in 1997, it muted our relative  performance in
the first quarter of 1998 when  interest  rates were fairly  steady.  Since May,
however, interest rates have moved lower, and the strategy has paid off.

[left margin]

"THE FUND'S ONE-YEAR RETURN PLACED IT IN THE TOP 20% OF ITS PEER GROUP."

YIELDS AS OF AUGUST 31, 1998

30-DAY SEC YIELD                     4.32%

30-DAY TAX-EQUIVALENT YIELDS
34.70% TAX BRACKET                   6.62%
37.42% TAX BRACKET                   6.90%
41.95% TAX BRACKET                   7.44%
45.22% TAX BRACKET                   7.88%

PORTFOLIO AT A GLANCE
                                    8/31/98          8/31/97
NUMBER OF SECURITIES                  83                87
WEIGHTED AVERAGE
MATURITY                           19.5 YRS          19.8 YRS
AVERAGE DURATION                    8.7 YRS           8.0 YRS
EXPENSE RATIO                        0.51%             0.48%

Investment terms are defined in the Glossary on page 42.


24      1-800-345-2021


California Long-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

DID YOU TAKE ANY ADDITIONAL MEASURES TO PROTECT THE FUND AGAINST CALLS?

     Discount  bonds were our main  defense  because  they offer more  potential
upside than premium  bonds if interest  rates fall and no more downside if rates
rise.  Another way we tried to insulate the fund from  inopportune  calls was to
increase the fund's holdings in non-callable  bonds,  which can't be redeemed by
their issuers before maturity.

HOW DID YOU MANAGE CALIFORNIA LONG-TERM TAX-FREE'S INTEREST RATE SENSITIVITY?

     As we added more discount bonds,  we also increased the fund's  sensitivity
to changes in interest  rates,  as measured  by  duration.  (The longer a fund's
duration,  the more its share price tends to rise or fall when rates change.) At
the end of the period,  the fund's duration was 8.7 years, up from 8.3 years six
months ago and 8.0 years at the beginning of the period.

     It's  important to note that we make only modest  adjustments to the fund's
duration,  generally  keeping  it within a year of the  duration  of  California
Long-Term  Tax-Free's  benchmark  (a  group  of funds  with  similar  investment
objectives).

WHY WAS THE FUND'S CREDIT QUALITY HIGHER AT THE END OF THE PERIOD THAN IT WAS AT
THE BEGINNING?

     We didn't think we were being adequately compensated--in the form of enough
extra yield--for holding a large amount of lower-rated bonds. An increase in the
amount of municipal debt issued with bond insurance  dramatically reduced credit
spreads,  which measure the  difference in yield between bonds of various credit
quality.

     About 60% of all  municipal  debt now comes to market with  insurance and a
AAA  rating.  As a  result,  there  is a  shrinking  amount  of  BBB  debt.  But
yield-hungry investors have kept demand for higher-yielding BBB securities quite
strong.  In light of shrinking supply and high demand,  the yield spread between
AAA and BBB California  long-term  securities narrowed to historical lows during
the period.

     Just a few  years  ago,  a  20-year  California  BBB bond  offered  a yield
advantage  of 100 basis  points or more over a AAA bond with the same  maturity.
Six months ago,  the same BBB bond  offered  only 20-30 basis  points more yield
than the AAA bond.  By the end of May,  that  spread had  diminished  to just 15
basis points. To look at it another way, a bond rated AAA offered roughly 96% of
the yield of lower-quality bonds at the end of the period, but carried much less
credit risk.

WHAT'S YOUR OUTLOOK FOR THE MUNICIPAL MARKET?

     As 1998 has  progressed,  the Asian economic crisis has taken a bigger bite
out of U.S.  economic growth and in turn calmed  inflationary  fears.  Inflation
presently  appears to be almost  non-existent,  rising at an annualized  rate of
just 1.6% for the first eight  months of this year.  And although the job market
remains strong, prices for goods and services seem to have stabilized. Given the
lack of any building inflationary  pressures, we believe that interest rates can
move  lower.  Furthermore,  continued  bad news out of Asia,  Russia,  and Latin
America will likely prompt the Federal Reserve to cut short-term interest rates

[right margin]

"JUST A FEW YEARS AGO, A 20-YEAR CALIFORNIA BBB BOND OFFERED A YIELD ADVANTAGE
OF 100 BASIS POINTS OR MORE OVER A BOND RATED AAA WITH THE SAME MATURITY. BY THE
END OF MAY, THAT SPREAD HAD DIMINISHED TO JUST 15 BASIS POINTS."

PORTFOLIO COMPOSITION BY CREDIT RATING
                  % OF FUND INVESTMENTS
                  AS OF             AS OF
                 8/31/98           2/28/98
AAA                53%               53%
AA                 11%               11%
A                  30%               31%
BBB                 6%                5%

Ratings provided by Standard & Poor's.  See Credit Rating  Guidelines on page 41
for more information.

"TO LOOK AT IT ANOTHER WAY, A BOND RATED AAA OFFERED ROUGHLY 96% OF THE YIELD OF
LOWER-QUALITY BONDS AT THE END OF THE PERIOD, BUT CARRIED MUCH LESS CREDIT
RISK."


                                               www.americancentury.com        25


California Long-Term Tax-Free--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

     As for the municipal  market,  we think that supply and demand will be more
balanced for the remainder of the year. Much of the supply we've seen so far was
the result of a  record-setting  $3.5 billion  municipal  bond issue by the Long
Island Power  Authority in May, as well as issuers  flooding the market with new
debt in advance of that deal.  Going forward,  we believe that municipal  supply
will taper off to a more  normalized  level for the  remainder  of the year.  If
demand  remains firm or rises,  the municipal  market would likely  benefit from
lower supply.

GIVEN YOUR OUTLOOK,  WHAT ARE YOUR PLANS FOR CALIFORNIA  LONG-TERM TAX-FREE OVER
THE NEXT SIX MONTHS?

     We expect to remain  focused  on the upper  tiers of the  municipal  market
until we think that  lower-quality  bonds offer adequate  compensation for their
higher credit risk.

     As long as we believe that  interest  rates have the  potential to decline,
we'll keep the fund's  duration  slightly  longer than its  neutral  position of
around eight years.  In addition,  we'll  maintain our stake in discount  bonds,
which  we  believe  will  outperform  their  premium  bond   counterparts  in  a
declining-rate environment.

[left margin]

"GIVEN THE LACK OF ANY BUILDING INFLATIONARY PRESSURES, WE BELIEVE THAT
INTEREST RATES CAN MOVE LOWER.

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF AUGUST 31, 1998
Revenue                    44%
COPs/Leases                23%
Land-Secured               16%
GO                          6%
Prerefunded/ETM             5%
Other                       6%

AS OF FEBRUARY 28, 1998
Revenue                    52%
COPs/Leases                21%
Land-Secured               15%
Prerefunded/ETM             5%
GO                          3%
Other                       4%

Security types are defined on page 42.


26      1-800-345-2021


Long-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------

AUGUST 31, 1998

Principal Amount                                                       Value
- --------------------------------------------------------------------------------
MUNICIPAL SECURITIES
             $  2,300,000  Alameda County COP, 6.80%,
                              6/15/17 (MBIA)(1)                        $898,610
                2,700,000  Brea Public Financing Auth. Rev.,
                              (Project Area AB), 7.00%,
                              8/1/15 (MBIA)                           2,973,213
                1,220,000  Brea Redevelopment Agency Tax
                              Allocation, (Project AB),
                              6.125%, 8/1/13 (MBIA)                   1,342,329
                1,300,000  California Educational Facility
                              Auth. Rev., Series 1989 I,
                              (Stanford University), 7.125%,
                              1/1/19                                  1,340,534
                1,500,000  California Educational Facility
                              Auth. Rev., Series 1997 B,
                              (Pooled College and University
                              Projects), 6.30%, 4/1/21                1,635,030
                4,000,000  California Health Facilities
                              Financing Auth. Rev., (Kaiser
                              Permanente), 7.00%, 10/1/18             4,200,920
                3,000,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1989 A, (Kaiser Permanente),
                              7.15%, 10/1/09(1)                       1,787,850
                1,500,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1988 A, (H.M. Newhall
                              Memorial Hospital), 8.00%,
                              10/1/18                                 1,534,875
                1,730,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1990 A, (Gould Medical),
                              7.30%, 4/1/20(2)                        1,866,065
                2,500,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1991 B, (Adventist Health),
                              6.75%, 3/1/14 (MBIA)                    2,698,275
                2,000,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1992 A, 6.75%, 3/1/20
                              (California Mortgage Insurance)         2,183,580
                1,290,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1992 C, (AIDS Healthcare
                              Foundation), 6.25%, 9/1/17              1,379,320
                5,165,000  California Health Facilities
                              Financing Auth. Rev., Series
                              1993 C, (St. Francis Memorial
                              Hospital), 5.875%, 11/1/23(2)           5,849,827
                1,400,000  California Housing Finance
                              Agency Rev., (Multi-Unit Rental
                              Housing), 6.75%, 2/1/09                 1,419,460
                1,290,000  California Housing Finance
                              Agency Rev., (Multi-Unit Rental
                              Housing), 6.875%, 2/1/22                1,310,601

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

             $  5,125,000  California Housing Finance
                              Agency Rev., Series 1994 G,
                              (Home Mortgage), 7.25%,
                              8/1/17                                 $5,565,443
                1,125,000  California Housing Finance
                              Agency Rev., Series 1995 C,
                              (Home Mortgage), 6.80%,
                              8/1/17                                  1,217,723
                1,500,000  California Pollution Control
                              Financing Auth. Rev., Series
                              1987 D, (Southern California
                              Edison), 6.85%, 12/1/08                 1,571,325
                1,000,000  California State Franchise Tax
                              Board COP, 6.90%, 10/1/99,
                              Prerefunded at 102% of Par(2)           1,056,600
                3,000,000  California State GO, 6.125%,
                              10/1/11 (AMBAC)                         3,494,190
                1,410,000  California State GO, Series
                              1984 B, (New Prison
                              Construction), 10.00%, 8/1/03           1,790,263
               17,100,000  California State Public Works
                              Board Lease Rev. COP, Series
                              1993 D, (Department of
                              Corrections State Prisons),
                              5.25%, 6/1/15 (FSA)                    18,203,289
                5,695,000  Capistrano School District Special
                              Tax, (Refunding Issue 1988-1),
                              6.50%, 9/1/14 (FSA)                     6,560,014
                1,000,000  Coachella Valley Water District
                              #71 COP, (Flood Control),
                              6.75%, 10/1/12                          1,129,140
                8,000,000  Compton Redevelopment Agency
                              Tax Allocation, Series 1995 A,
                              6.50%, 8/1/13 (FSA)                     9,201,200
                2,580,000  Concord Joint Power Financing
                              Auth. Lease Rev. COP, (Police
                              Facilities), 5.25%, 8/1/13              2,732,246
               10,250,000  East Bay Municipal Utility District
                              Wastewater Treatment System
                              Rev., 4.75%, 6/1/21 (FGIC)              9,937,273
                4,700,000  East Bay Municipal Utility District
                              Wastewater System Rev.,
                              4.75%, 6/1/28 (MBIA)                    4,536,346
                1,815,000  Kern County High School District
                              GO, 7.15%, 8/1/14 (MBIA)(2)             2,324,325
                1,305,000  Los Altos Association of Bay Area
                              Governments COP, 5.90%,
                              5/1/27                                  1,388,755
                3,475,000  Los Angeles Community
                              Redevelopment Agency
                              Housing Rev., Series 1994 A,
                              6.45%, 7/1/17 (AMBAC)                   3,722,385
                5,000,000  Los Angeles County Metropolitan
                              Transportation Auth. Sales Tax
                              Rev., Series 1993 B, 4.75%,
                              7/1/18 (AMBAC)                          4,883,500

See Notes to Financial Statements


                                                www.americancentury.com      27


Long-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

             $  2,000,000  Los Angeles County Metropolitan
                              Transportation Auth. Sales Tax
                              Rev., Series 1996 A, 6.00%,
                              7/1/23 (MBIA)                          $2,212,280
                3,000,000  Los Angeles County
                              Transportation Commission
                              Sales Tax Rev., Series 1987 A,
                              7.40%, 7/1/15                           3,148,110
                4,050,000  Los Angeles County
                              Transportation Commission
                              Sales Tax Rev., Series 1989 A,
                              (Capital Appreciation), 7.20%,
                              7/1/02 (MBIA)(1)                        3,265,434
                1,000,000  Los Angeles Transportation
                              Commission Sales Tax Rev.,
                              6.50%, 7/1/13 (MBIA)                    1,086,260
                2,410,000  Los Angeles Wastewater System
                              Rev., Series 1991 C, 6.90%,
                              6/1/09                                  2,510,015
                3,050,000  Los Angeles Wastewater System
                              Rev., Series 1991 C, 7.10%,
                              6/1/18                                  3,181,028
                1,865,000  Mendocino Coast District Health
                              Care Facility Rev., 5.875%,
                              2/1/20                                  2,000,045
                8,000,000  Metropolitan Water District of
                              Southern California Waterworks
                              Rev., 5.75%, 8/10/18                    8,946,000
                3,000,000  Metropolitan Water District of
                              Southern California Waterworks
                              Rev., Series 1996 B, 4.75%,
                              7/1/21 (MBIA)                           2,906,310
                5,150,000  Mid-Peninsula Regional Open
                              Space District GO, 7.00%,
                              9/1/14                                  5,915,496
                5,830,000  Modesto, Stockton, Redding
                              Public Power Agency Rev.,
                              Series 1989 D, (San Juan),
                              6.75%, 7/1/20 (MBIA)                    7,069,983
                3,000,000  Oakland Redevelopment Agency
                              Tax Allocation, (Central District
                              Redevelopment Tax), 5.50%,
                              2/1/14 (AMBAC)                          3,280,020
                1,855,000  Pacifica Financing Auth. Sewer
                              Rev., 6.20%, 8/1/26                     1,902,674
                2,950,000  Pasadena COP, (Old Pasadena
                              Parking Facility), 6.25%,
                              1/1/18                                  3,372,765
                4,475,000  Pittsburg Redevelopment Agency
                              Tax Allocation, (Los Medanos
                              Community Development),
                              6.20%, 8/1/19                           4,842,040
                5,000,000  Pittsburg Redevelopment Agency
                              Tax Allocation, (Los Medanos
                              Community Development),
                              6.25%, 8/1/26                           5,430,700

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

             $  2,700,000  Pittsburg Redevelopment Agency
                              Tax Allocation, Series 1993 B,
                              (Los Medanos Community
                              Development), 5.80%, 8/1/34
                              (FSA)                                  $3,021,921
                2,100,000  Pomona Public Financing Auth.
                              Rev., Series 1992 A, (Water
                              Treatment), 6.10%, 7/1/17
                              (AMBAC)                                 2,287,698
                9,750,000  Puerto Rico Commonwealth GO,
                              4.50%, 7/1/23                           9,014,753
                5,680,000  Riverside County Asset Leasing
                              Corporation Rev. COP, Series
                              1997 B, (Riverside County
                              Hospital), 5.00%, 6/1/19
                              (MBIA)                                  5,632,458
                9,655,000  Sacramento Municipal Utility
                              District Electric Rev., Series
                              1993 G, 4.75%, 9/1/21
                              (MBIA)                                  9,301,724
                8,500,000  Sacramento Municipal Utility
                              District Electric Rev., Series
                              1997 K, 5.25%, 7/1/24
                              (AMBAC)                                 8,990,705
                1,000,000  Saddleback Valley Unified School
                              District Public Financing Auth.
                              Special Tax Rev., Series 1997 A,
                              6.00%, 9/1/16 (FSA)                     1,152,100
                7,425,000  San Bernardino County COP,
                              (Medical Center Financing),
                              4.75%, 8/1/28                           6,990,118
                3,400,000  San Diego County COP, 5.625%,
                              9/1/12 (AMBAC)                          3,760,400
                3,500,000  San Diego County Regional
                              Transportation Sales Tax Rev.,
                              Series 1991 A, 6.93%,
                              4/1/04(1)(2)                            2,781,205
                2,850,000  San Diego County Water Auth.
                              Water Rev. COP, Series 1997 A,
                              4.75%, 5/1/20                           2,765,355
                6,405,000  San Francisco Bay Area Rapid
                              Transit District Sales Tax Rev.,
                              4.75%, 7/1/23 (AMBAC)                   6,200,424
                1,000,000  San Francisco City and County
                              Redevelopment Hotel Tax Rev.,
                              6.75%, 7/1/15 (FSA)                     1,165,880
                3,000,000  San Jose Financing Auth. Rev.
                              COP, Series 1993 C,
                              (Convention Center), 6.375%,
                              9/1/13                                  3,207,420
                7,575,000  San Jose Financing Auth. Rev.
                              COP, Series 1993 D, (Central
                              Service Yard), 5.25%, 10/15/23          7,648,478
                9,525,000  San Jose Redevelopment Agency
                              Tax Allocation, Series 1993 D,
                              (Merged Area Redevelopment),
                              5.75%, 8/1/24                           9,983,724
                5,000,000  San Marino Unified School District 
                              GO, Series 1998
                              B, 5.00%, 6/1/23                        5,088,900

                                              See Notes to Financial Statements


28       1-800-345-2021


Long-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

             $  3,475,000  San Mateo County Joint Powers
                              Finance Auth. Lease Rev. COP,
                              (Capital Projects Program),
                              6.50%, 7/1/16 (MBIA)                   $4,198,356
                4,000,000  San Mateo County Joint Powers
                              Finance Auth. Lease Rev. COP,
                              (Capital Projects Program),
                              6.00%, 7/1/19 (MBIA)                    4,613,000
                3,500,000  Santa Ana Finance Auth. Lease
                              Rev. COP, 6.25%, 7/1/15
                              (MBIA)                                  4,130,420
                4,830,000  Santa Monica Community
                              College District COP, Series
                              1997 A, 5.90%, 2/1/27                   5,214,033
                3,730,000  Southern California Public Power
                              Auth. Rev., (Multipurpose),
                              6.75%, 7/1/13 (FSA)                     4,578,239
                1,425,000  Southern California Public Power
                              Auth. Rev., (Transportation
                              Auth.), 7.00%, 7/1/09                   1,521,387
                7,315,000  Southern California Public Power
                              Auth. Rev., 6.75%, 7/1/12
                              (FSA)                                   8,931,981
                3,260,000  Southern California Public Power
                              Auth. Rev., 6.00%, 7/1/18               3,331,916
                3,000,000  Southern California Public Power
                              Auth. Rev., Series 1989 A,
                              7.15%, 7/1/04 (AMBAC)(1)                2,362,830
                2,000,000  Southern Orange County Finance
                              Auth. Special Tax Rev., Series
                              1994 A, 7.00%, 9/1/11
                              (MBIA)                                  2,494,820
                  800,000  Stockton Health Facilities Rev.,
                              Series 1997 A, (Dameron
                              Hospital Association), 5.70%,
                              12/1/14                                   818,944
                2,000,000  Taft Public Financing Auth. Lease
                              Rev. COP, Series 1997 A,
                              (Community Correctional
                              Facility), 6.05%, 1/1/17                2,139,960
                1,400,000  Torrance Redevelopment Agency
                              Rev., Series 1998 A,
                              (Downtown Redevelopment),
                              5.60%, 9/1/28                           1,414,014
                1,300,000  Upland COP, (San Antonio
                              Community Hospital), 5.00%,
                              1/1/18                                  1,263,041
                3,020,000  Watsonville California Insured
                              Hospital Rev., Series 1996 A,
                              (Watsonville Community
                              Hospital), 6.20%, 7/1/12                3,468,379
                                                                 ---------------
TOTAL MUNICIPAL SECURITIES--96.2%                                   312,278,249
                                                                 ---------------
   (Cost $287,315,447)

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

MUNICIPAL DERIVATIVES--1.3%
             $  4,000,000  Northern California Transmission
                              Rev., Inverse Floater, 6.78%,
                              4/29/24 (MBIA)(3)                      $4,300,000
                                                                 ---------------
   (Cost $3,963,920)

SHORT-TERM MUNICIPAL SECURITIES
                3,300,000  California Health Facilities 
                              Financing Auth. Rev.,
                              Series 1996 B, VRDN, 
                              3.15%, 9/1/98 (AMBAC) (SBBPA:
                              ABN Amro Bank N.V.)                     3,300,000
                4,800,000  Irvine Improvement Bond Act
                              1915, (Assessment District No.
                              97-17), VRDN, 3.15%, 9/1/98
                              (LOC: Bayerische Vereinsbank
                              A.G.)                                   4,800,000
                                                                 ---------------
TOTAL SHORT-TERM
MUNICIPAL SECURITIES--2.5%                                            8,100,000
                                                                 ---------------
   (Cost $8,100,000)

TOTAL INVESTMENT SECURITIES--100.0%                                $324,678,249
                                                                 ===============
   (Cost $299,379,367)

See Notes to Financial Statements


                                                www.americancentury.com      29


Long-Term Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

NOTES TO SCHEDULE OF INVESTMENTS

AMBAC = AMBAC Assurance Corporation

COP = Certificates of Participation

FGIC = Financial Guaranty Insurance Co.

FSA = Financial Security Assurance Inc.

GO = General Obligation

LOC = Letter of Credit

MBIA = MBIA Insurance Corp.

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
August 31, 1998.

(1)  Security  is a  zero-coupon  municipal  bond.  The  yield  at  purchase  is
indicated.  Zero-coupon  securities are purchased at a substantial discount from
their value at maturity.

(2)  Escrowed  to  maturity  in U.S.  Government  securities  or state and local
government securities.

(3) Inverse floaters have interest rates which move inversely to market interest
rates. Inverse floaters typically have durations which are longer than long-term
bonds, which may cause their value to be more volatile than long-term bonds when
interest rates change.

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

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

                                              See Notes to Financial Statements


30       1-800-345-2021


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

                                            LIMITED-TERM   INTERMEDIATE-TERM    LONG-TERM
AUGUST 31, 1998                               TAX-FREE         TAX-FREE         TAX-FREE

ASSETS
<S>                                              <C>              <C>             <C>    
Investment securities, at value
  (identified cost of $132,960,099,
  $439,449,344 and $299,379,367,
  respectively) (Note 3) ...............   $ 135,798,378    $ 463,133,282   $ 324,678,249
Cash ...................................         112,234          387,196         493,838
Investment in affiliated money
market fund (Note 2) ...................           7,698           10,049           7,152
Receivable for investments sold ........            --          8,000,550            --
Interest receivable ....................       1,784,067        7,077,883       3,909,560
                                           -------------    -------------   -------------
                                             137,702,377      478,608,960     329,088,799
                                           -------------    -------------   -------------

LIABILITIES
Disbursements in excess of
demand deposit cash ....................       2,511,684        3,124,064       1,237,742
Payable for investments purchased ......       4,915,798       14,363,084       2,243,761
Payable for capital shares redeemed ....          40,274          151,604         147,987
Accrued management fees (Note 2) .......          55,200          196,541         137,235
Dividends payable ......................          42,271          168,955         127,666
Payable for trustees' fees
and expenses ...........................             563              873             752
                                           -------------    -------------   -------------
                                               7,565,790       18,005,121       3,895,143
                                           -------------    -------------   -------------
Net Assets .............................   $ 130,136,587    $ 460,603,839   $ 325,193,656
                                           =============    =============   =============

CAPITAL SHARES
Outstanding (Unlimited number
of shares authorized) ..................      12,481,523       40,506,442      27,742,768
                                           =============    =============   =============
Net Asset Value Per Share ..............   $       10.43    $       11.37   $       11.72
                                           =============    =============   =============

NET ASSETS CONSIST OF:
Capital paid in ........................   $ 127,878,867    $ 434,312,587   $ 298,230,438
Undistributed net investment income ....            --              8,020           9,033
Accumulated undistributed net
realized gain (loss) on investments ....        (580,559)       2,599,294       1,655,303
Net unrealized appreciation on
investments (Note 3) ...................       2,838,279       23,683,938      25,298,882
                                           -------------    -------------   -------------
                                           $ 130,136,587    $ 460,603,839   $ 325,193,656
                                           =============    =============   =============
</TABLE>

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

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

See Notes to Financial Statements


                                               www.americancentury.com        31


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

                                        LIMITED-TERM  INTERMEDIATE-TERM   LONG-TERM
YEAR ENDED AUGUST 31, 1998                TAX-FREE        TAX-FREE        TAX-FREE

INVESTMENT INCOME
Income:
<S>                                     <C>             <C>             <C>        
Interest ..........................     $ 5,824,726     $22,679,637     $17,485,505
                                        -----------     -----------     -----------

Expenses (Note 2):
Management fees ...................         656,701       2,264,194       1,599,824
Trustees' fees and expenses .......           7,434          12,959          10,682
                                        -----------     -----------     -----------
                                            664,135       2,277,153       1,610,506
                                        -----------     -----------     -----------
Net investment income .............       5,160,591      20,402,484      15,874,999
                                        -----------     -----------     -----------

REALIZED AND UNREALIZED
GAIN ON INVESTMENTS (NOTE 3)
Net realized gain on investments ..         253,098       3,919,772       2,963,978
Change in net unrealized
appreciation on investments .......       1,302,650       5,632,637       8,929,558
                                        -----------     -----------     -----------
Net realized and unrealized
gain on investments ...............       1,555,748       9,552,409      11,893,536
                                        -----------     -----------     -----------
Net Increase in Net Assets
Resulting from Operations .........     $ 6,716,339     $29,954,893     $27,768,535
                                        ===========     ===========     ===========
</TABLE>

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

Fund OPERATIONS include:

* income earned from investments

* management fees and other expenses

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

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

                                              See Notes to Financial Statements


32       1-800-345-2021


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

YEARS ENDED AUGUST 31, 1998  AND  AUGUST 31, 1997

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

Increase in Net Assets                    1998           1997            1998             1997             1998            1997

OPERATIONS
<S>                                  <C>             <C>             <C>             <C>             <C>             <C>          
Net investment income .............  $   5,160,591   $   4,682,931   $  20,402,484   $  20,904,240   $  15,874,999   $  16,098,064
Net realized gain on investments ..        253,098         317,683       3,919,772       4,489,257       2,963,978       4,196,683
Change in net unrealized
  appreciation on investments .....      1,302,650         857,109       5,632,637       5,607,704       8,929,558       7,428,889
                                     -------------   -------------   -------------   -------------   -------------   -------------
Net increase in net assets
  resulting from operations .......      6,716,339       5,857,723      29,954,893      31,001,201      27,768,535      27,723,636
                                     -------------   -------------   -------------   -------------   -------------   -------------

DISTRIBUTIONS TO SHAREHOLDERS
From net investment income ........     (5,160,591)     (4,696,464)    (20,402,484)    (20,910,599)    (15,874,999)    (16,104,213)
From net realized gains on
   investment transactions ........           --              --        (5,651,243)     (1,183,599)     (5,354,293)       (424,536)
                                     -------------   -------------   -------------   -------------   -------------   -------------
Decrease in net assets
  from distributions ..............     (5,160,591)     (4,696,464)    (26,053,727)    (22,094,198)    (21,229,292)    (16,528,749)
                                     -------------   -------------   -------------   -------------   -------------   -------------

CAPITAL SHARE TRANSACTIONS
Proceeds from shares sold .........     43,612,098      65,320,633     155,826,396     156,377,551      98,878,179     114,942,666
Proceeds from reinvestment
  of distributions ................      3,439,775       3,333,775      19,653,179      16,509,842      14,613,846      11,252,698
Payments for shares redeemed ......    (45,102,215)    (46,891,310)   (154,216,741)   (177,304,237)    (99,508,180)   (120,742,069)
                                     -------------   -------------   -------------   -------------   -------------   -------------
Net increase (decrease) in net
  assets from capital share
  transactions ....................      1,949,658      21,763,098      21,262,834      (4,416,844)     13,983,845       5,453,295
                                     -------------   -------------   -------------   -------------   -------------   -------------
Net increase in net assets ........      3,505,406      22,924,357      25,164,000       4,490,159      20,523,088      16,648,182

NET ASSETS
Beginning of year .................    126,631,181     103,706,824     435,439,839     430,949,680     304,670,568     288,022,386
                                     -------------   -------------   -------------   -------------   -------------   -------------
End of year .......................  $ 130,136,587   $ 126,631,181   $ 460,603,839   $ 435,439,839   $ 325,193,656   $ 304,670,568
                                     =============   =============   =============   =============   =============   =============
Undistributed net investment
  income ..........................           --              --     $       8,020            --     $       9,033            --
                                     =============   =============   =============   =============   =============   =============

TRANSACTIONS IN SHARES
OF THE FUNDS
Sold ..............................      4,214,707       6,370,918      13,806,443      13,989,592       8,544,372      10,168,195
Issued in reinvestment of
  distributions ...................        332,197         325,340       1,741,245       1,479,691       1,262,693         995,435
Redeemed ..........................     (4,357,987)     (4,577,218)    (13,662,495)    (15,865,262)     (8,606,849)    (10,670,666)
                                     -------------   -------------   -------------   -------------   -------------   -------------
Net increase (decrease) ...........        188,917       2,119,040       1,885,193        (395,979)      1,200,216         492,964
                                     =============   =============   =============   =============   =============   =============
</TABLE>

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

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

* distributions--income and gains distributed to shareholders

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

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

See Notes to Financial Statements


                                               www.americancentury.com        33


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

AUGUST 31, 1998

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) (the "Funds") are three of
the seven funds issued by the Trust.  The Funds are  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. The Funds invest primarily
in  municipal  obligations  with  maturities  based  on each  Fund's  investment
objective.  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 are in  accordance  with  generally
accepted accounting principles.

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

     SECURITY  TRANSACTIONs--Security  transactions  are accounted for as of the
trade date. Net realized gains and losses are determined on the identified  cost
basis, which is also used for federal income tax purposes.

     INVESTMENT  INCOME--Interest  income is recorded  on the accrual  basis and
includes accretion of discounts and amortization of premiums.

     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 income 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.  For the year ended
August  31,  1998,  100%  (unaudited)  of  the  Funds'  distributions  from  net
investment  income have been  designated  as exempt from federal and  California
state income tax.

     At August 31, 1998,  accumulated  net realized  capital loss  carryovers of
$580,559 for  Limited-Term  (expiring  2003 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  reflect the differing character
of certain income items and net capital gains and losses for financial statement
and tax  purposes  and may  result in  reclassification  among  certain  capital
accounts.

     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 contracts may include the possibility that
the changes in value of the contract may not correlate with the changes in value
of the underlying  securities.  Upon entering into a futures contract, the Funds
are  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 Funds.  The
variation  margin is equal to the  daily  change  in the  contract  value and is
recorded as an unrealized  gain or loss. The Funds  recognize a realized gain or
loss when the contract is closed or expires.  Net realized and unrealized  gains
or losses  occurring  during  the  holding  period of  futures  contracts  are a
component of realized gain (loss) on  investments  and  unrealized  appreciation
(depreciation)  on  investments,   respectively.  There  were  no  open  futures
contracts at August 31, 1998.

     USE OF ESTIMATES--  The  preparation of financial  statements in conformity
with  generally  accepted  accounting  principles  requires  management  to make
estimates and assumptions.  These estimates and assumptions  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.

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


34       1-800-345-2021


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998
- --------------------------------------------------------------------------------
2. TRANSACTIONS WITH RELATED PARTIES

     The Trust has entered into a Management  Agreement  with  American  Century
Investment  Management,  Inc.  (ACIM) that  provides  each Fund with  investment
advisory and management  services in exchange for a single,  unified  management
fee.  Expenses  excluded from this  agreement are  brokerage,  taxes,  portfolio
insurance,  interest,  fees and expenses of the Trustees who are not  considered
"interested persons" as defined in the Investment Company Act of 1940 (including
counsel fees) and extraordinary  expenses.  The annual rate at which this fee is
assessed is determined monthly in a two-step process: First, a fee rate schedule
is  applied  to the net  assets  of all of the  funds in the  Fund's  investment
category which are managed by ACIM (the "Investment  Category Fee"). The overall
investment objective of each Fund determines its Investment Category.  The three
investment  categories  are:  the  Money  Market  Fund  Category,  the Bond Fund
Category  and the Equity  Fund  Category.  Limited-Term,  Intermediate-Term  and
Long-Term are included in the Bond Fund  Category.  Second,  a separate fee rate
schedule  is applied to the net assets of all of the funds  managed by ACIM (the
"Complex Fee").  The Investment  Category Fee and the Complex Fee are then added
to determine the unified management fee rate. The management fee is paid monthly
by each Fund based on each Fund's aggregate  average daily net assets during the
previous month multiplied by the monthly management fee rate.

    The annualized Investment Category Fee schedule is as follows:

     0.2800% of the first $1 billion 
     0.2280% of the next $1 billion 
     0.1980% of the next $3 billion 
     0.1780% of the next $5 billion 
     0.1650% of the next $15 billion 
     0.1630% of the next $25 billion 
     0.1625% of the average daily net assets over $50 billion

    The annualized Complex Fee schedule (for all Funds) is as follows:

     0.3100% of the first $2.5 billion 
     0.3000% of the next $7.5 billion
     0.2985% of the next $15 billion 
     0.2970% of the next $25 billion
     0.2960% of the next $50 billion 
     0.2950% of the next $100 billion
     0.2940% of the next $100 billion 
     0.2930% of the next $200 billion
     0.2920% of the next $250 billion 
     0.2910% of the next $500 billion
     0.2900% of the average daily net assets over $1,250 billion

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

     As of August 31, 1998, Limited-Term,  Intermediate-Term,  and Long-Term had
invested  $7,698,  $10,049,  and  $7,152,  respectively,  in shares of  American
Century - Benham California  Tax-Free Money Market Fund (Tax-Free Money Market).
The terms of such transactions were identical to those with non-related entities
except that, to avoid  duplicative  management  fees, the Funds did not pay ACIM
management fees with respect to assets invested in Tax-Free Money Market.


                                               www.americancentury.com        35


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998
- --------------------------------------------------------------------------------
3. INVESTMENT TRANSACTIONS

  Investment transactions, excluding short-term investments, were as follows:

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

PURCHASES
Municipal Obligations ... $66,887,853          $151,318,909        $116,868,450

PROCEEDS FROM SALES
Municipal Obligations ... $55,304,548          $124,203,381        $112,147,017

  On  August  31,  1998,  the   composition  of  unrealized   appreciation   and
depreciation of investment securities based on the aggregate cost of investments
for federal income tax purposes was as follows:

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

Appreciation ............  $2,838,279          $23,710,245         $25,298,882

Depreciation ............      --                (26,307)               --
                          -------------   -----------------    -----------------

Net .....................  $2,838,279          $23,683,938         $25,298,882
                          =============   =================    =================

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


36       1-800-345-2021


<TABLE>
<CAPTION>
Limited-Term Tax-Free--Financial Highlights
- --------------------------------------------------------------------------------

                                            FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED AUGUST 31
 
                                          1998           1997           1996           1995           1994
PER-SHARE DATA
Net Asset Value,
<S>                                  <C>            <C>            <C>            <C>            <C>        
Beginning of Year .................  $     10.30    $     10.19    $     10.23    $     10.12    $     10.34
                                     -----------    -----------    -----------    -----------    -----------
Income From Investment
Operations
  Net Investment Income ...........         0.42           0.43           0.43           0.41           0.38
  Net Realized and Unrealized
  Gain (Loss) on Investment
  Transactions ....................         0.13           0.11          (0.04)          0.11          (0.18)
                                     -----------    -----------    -----------    -----------    -----------
  Total From Investment
  Operations ......................         0.55           0.54           0.39           0.52           0.20
                                     -----------    -----------    -----------    -----------    -----------
Distributions
  From Net Investment Income ......        (0.42)         (0.43)         (0.43)         (0.41)         (0.38)
  In Excess of Net Realized Gains .         --             --             --             --            (0.04)
                                     -----------    -----------    -----------    -----------    -----------
  Total Distributions .............        (0.42)         (0.43)         (0.43)         (0.41)         (0.42)
                                     -----------    -----------    -----------    -----------    -----------
Net Asset Value, End of Year ......  $     10.43    $     10.30    $     10.19    $     10.23    $     10.12
                                     ===========    ===========    ===========    ===========    ===========
  Total Return(1) .................         5.40%          5.42%          3.87%          5.33%          1.90%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .............         0.52%          0.49%          0.49%          0.51%          0.51%
Ratio of Net Investment Income
to Average Net Assets .............         4.02%          4.20%          4.20%          4.10%          3.68%
Portfolio Turnover Rate ...........           44%            47%            44%            50%            66%
Net Assets, End
of Year (in thousands) ............  $   130,137    $   126,631    $   103,707    $   104,723    $   120,627
</TABLE>

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

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

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

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

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

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

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

See Notes to Financial Statements


                                               www.americancentury.com        37


<TABLE>
<CAPTION>
Intermediate-Term Tax-Free--Financial Highlights
- --------------------------------------------------------------------------------

                                                   FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED AUGUST 31

                                            1998            1997            1996            1995            1994
PER-SHARE DATA
Net Asset Value,
<S>                                    <C>             <C>             <C>             <C>             <C>        
Beginning of Year ..................   $     11.27     $     11.05     $     11.06     $     10.86     $     11.36
                                       -----------     -----------     -----------     -----------     -----------
Income From Investment
Operations
  Net Investment Income ............          0.52            0.54            0.54            0.54            0.54
  Net Realized and Unrealized
  Gain (Loss) on Investment
  Transactions .....................          0.25            0.25           (0.01)           0.20           (0.41)
                                       -----------     -----------     -----------     -----------     -----------
  Total From Investment
  Operations .......................          0.77            0.79            0.53            0.74            0.13
                                       -----------     -----------     -----------     -----------     -----------
Distributions
  From Net Investment Income .......         (0.52)          (0.54)          (0.54)          (0.54)          (0.54)
  From Net Realized Gains on
  Investment Transactions ..........         (0.15)          (0.03)           --              --             (0.08)
  In Excess of Net Realized Gains ..          --              --              --              --             (0.01)
                                       -----------     -----------     -----------     -----------     -----------
  Total Distributions ..............         (0.67)          (0.57)          (0.54)          (0.54)          (0.63)
                                       -----------     -----------     -----------     -----------     -----------
Net Asset Value, End of Year .......   $     11.37     $     11.27     $     11.05     $     11.06     $     10.86
                                       ===========     ===========     ===========     ===========     ===========
  Total Return(1) ..................          7.00%           7.39%           4.79%           7.09%           1.11%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets ..............          0.51%           0.48%           0.48%           0.48%           0.48%
Ratio of Net Investment Income
to Average Net Assets ..............          4.60%           4.81%           4.87%           5.02%           4.82%
Portfolio Turnover Rate ............            28%             42%             36%             25%             44%
Net Assets, End
of Year (in thousands) .............   $   460,604     $   435,440     $   430,950     $   417,550     $   448,293
</TABLE>

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

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

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

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

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

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

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

                                              See Notes to Financial Statements


38       1-800-345-2021


<TABLE>
<CAPTION>
Long-Term Tax-Free--Financial Highlights
- --------------------------------------------------------------------------------
        
                                               FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED AUGUST 31

                                           1998           1997            1996            1995            1994
PER-SHARE DATA
Net Asset Value,
<S>                                   <C>             <C>             <C>             <C>             <C>        
Beginning of Year .................   $     11.48     $     11.06     $     10.94     $     10.88     $     12.02
                                      -----------     -----------     -----------     -----------     -----------
Income From Investment
Operations
  Net Investment Income ...........          0.59            0.61            0.61            0.62            0.63
  Net Realized and Unrealized
  Gain (Loss) on Investment
  Transactions ....................          0.44            0.44            0.12            0.12           (0.71)
                                      -----------     -----------     -----------     -----------     -----------
  Total From Investment
  Operations ......................          1.03            1.05            0.73            0.74           (0.08)
                                      -----------     -----------     -----------     -----------     -----------
Distributions
  From Net Investment Income ......         (0.59)          (0.61)          (0.61)          (0.62)          (0.63)
  From Net Realized Gains on
  Investment Transactions .........         (0.20)          (0.02)           --             (0.06)          (0.43)
                                      -----------     -----------     -----------     -----------     -----------
  Total Distributions .............         (0.79)          (0.63)          (0.61)          (0.68)          (1.06)
                                      -----------     -----------     -----------     -----------     -----------
Net Asset Value, End of Year ......   $     11.72     $     11.48     $     11.06     $     10.94     $     10.88
                                      ===========     ===========     ===========     ===========     ===========
  Total Return(1) .................          9.25%           9.70%           6.77%           7.21%          (0.78)%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .............          0.51%           0.48%           0.48%           0.49%           0.48%
Ratio of Net Investment Income
to Average Net Assets .............          5.07%           5.40%           5.48%           5.84%           5.51%
Portfolio Turnover Rate ...........            36%             50%             42%             60%             62%
Net Assets, End
of Year (in thousands) ............   $   325,194     $   304,671     $   288,022     $   276,085     $   277,477
</TABLE>

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

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

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

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

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

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

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

See Notes to Financial Statements


                                               www.americancentury.com        39


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

To the Board of Trustees of the
American Century California Tax-Free and Municipal Funds
and Shareholders of the American Century-Benham California Limited-Term
Tax-Free Fund, the American Century-Benham California Intermediate-Term Tax Free
Fund and the American Century-Benham California Long-Term Tax-Free Fund


In our opinion, the accompanying statements of assets and liabilities, including
the schedules of investments, and the related statements of operations,  changes
in net assets and the  financial  highlights  present  fairly,  in all  material
respects,  the  financial  position of the  American  Century-Benham  California
Limited-Term   Tax-Free   Fund,   the   American    Century-Benham    California
Intermediate-Term  Tax-Free  Fund  and the  American  Century-Benham  California
Long-Term  Tax-Free Fund (three of the funds  constituting  the American Century
California  Tax-Free and Municipal Funds,  hereafter referred to as the "Funds")
at August 31, 1998, the results of each of their operations, the changes in each
of their net assets and the  financial  highlights  for the year then ended,  in
conformity  with  generally  accepted  accounting  principles.  The statement of
changes  in net assets for the year  ended  August  31,  1997 and the  financial
highlights  for the four years in the period ended August 31, 1997 for each fund
were audited by other auditors,  whose report,  dated October 3, 1997, expressed
an  unqualified  opinion on those  statements.  These  financial  statements and
financial highlights  (hereafter referred to as "financial  statements") are the
responsibility  of the Funds'  management;  our  responsibility is to express an
opinion on these  financial  statements  based on our audits.  We conducted  our
audits of these  financial  statements in  accordance  with  generally  accepted
auditing  standards  which  require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the  amounts  and  disclosures  in  the  financial  statements,   assessing  the
accounting  principles  used and significant  estimates made by management,  and
evaluating the overall  financial  statement  presentation.  We believe that our
audits,  which  included  confirmation  of  securities  at  August  31,  1998 by
correspondence with the custodian and brokers and the application of alternative
auditing procedures where confirmations from brokers were not received,  provide
a reasonable basis for the opinion expressed above.


                                                      PricewaterhouseCoopers LLP


Kansas City, Missouri
October 14, 1998


40      1-800-345-2021


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

INVESTMENT PHILOSOPHY AND POLICIES

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

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

     CALIFORNIA  LIMITED-TERM  TAX-FREE is a variable-price bond fund that seeks
to provide  interest income exempt from both federal and California state income
taxes.  The fund  invests  primarily in  California  municipal  securities  with
maturities of 1-5 years and maintains a weighted  average maturity of five years
or less.

     CALIFORNIA  INTERMEDIATE-TERM  TAX-FREE is a variable-price  bond fund that
seeks to provide  interest income exempt from both federal and California  state
income taxes. The fund invests primarily in California municipal securities with
maturities  of four years or more and maintains a weighted  average  maturity of
5-10 years.

     CALIFORNIA  LONG-TERM TAX-FREE is a variable-price  bond fund that seeks to
provide  interest income exempt from federal and California  state income taxes.
The fund invests primarily in California municipal securities with maturities of
seven or more years and  maintains  a weighted  average  maturity of 10 years or
more.

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 index's  average  maturity is 3
years.

     The LEHMAN  BROTHERS  5-YEAR GENERAL  OBLIGATION  (GO) 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 index's  average
maturity is approximately 5 years.

     THE LEHMAN BROTHERS LONG-TERM MUNICIPAL BOND INDEX is composed of more than
2,800 municipal bonds with maturities  greater than 22 years. The average credit
rating of the securities in the index is AA2/AA3.  The index's average  maturity
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.

     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.


INVESTMENT TEAM LEADERS

PORTFOLIO MANAGERS
     DAVE MACEWEN
     COLLEEN DENZLER
     JOEL SILVA

CREDIT RESEARCH DIRECTOR
     STEVEN PERMUT


CREDIT RATING GUIDELINES

       CREDIT  RATINGS  ARE ISSUED BY  INDEPENDENT  RESEARCH  COMPANIES  SUCH AS
STANDARD  & POOR'S  AND  MOODY'S.  RATINGS  ARE BASED ON AN  ISSUER'S  FINANCIAL
STRENGTH AND ABILITY TO PAY INTEREST AND PRINCIPAL IN A TIMELY MANNER.

       IT'S IMPORTANT TO NOTE THAT CREDIT RATINGS ARE SUBJECTIVE, REFLECTING THE
OPINIONS OF THE RATING AGENCIES; THEY ARE NOT ABSOLUTE STANDARDS OF QUALITY.


                                               www.americancentury.com        41


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

RETURNS

* TOTAL  RETURN  figures  show the overall  percentage  change in the value of a
hypothetical  investment  in  the  fund  and  assume  that  all  of  the  fund's
distributions are reinvested.

* AVERAGE ANNUAL RETURNS  illustrate the annually  compounded returns that would
have produced the fund's cumulative total returns if the fund's  performance had
been  constant  over the  entire  period.  Average  annual  returns  smooth  out
variations  in a fund's  return;  they are not the same as  fiscal  year-by-year
results.

YIELDS

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

*  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

* 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.

* BULLET  STRUCTURE--a  structure  that clusters a portfolio's  bond  maturities
around a single maturity (usually an intermediate-term maturity). This structure
tends  to  perform  best  when the  yield  curve is  moving  from  flat to steep
(long-term  rates are rising faster that short-term  rates, or short-term  rates
are falling faster than long-term rates).

INVESTMENT TERMS

* BASIS POINT--one  one-hundredth  of a percentage point (or 0.01%).  Therefore,
100 basis points equal one percentage point (or 1%).

* YIELD CURVE--a graphic representation of the relationship between maturity and
yield for fixed-income securities.

STATISTICAL TERMINOLOGY

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

*  WEIGHTED  AVERAGE   MATURITY   (WAM)--a  measure  of  the  sensitivity  of  a
fixed-income  portfolio to interest rate changes. WAM indicates the average time
until the securities in the portfolio mature, weighted by dollar amount.

* 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.

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

TYPES OF MUNICIPAL SECURITIES

* 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.

*    GO BONDS--general obligation securities backed by the taxing power of the
issuer.

*  LAND-SECURED  BONDS--securities  such as Mello-Roos  bonds and 1915 Act bonds
that are issued to finance real estate development projects.

*  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.

*  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).


42       1-800-345-2021


Notes
- --------------------------------------------------------------------------------


                                               www.americancentury.com        43


Notes
- --------------------------------------------------------------------------------


44       1-800-345-2021


[inside back cover]

[right margin]

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

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

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

AUTOMATED INFORMATION LINE:
1-800-345-8765

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

FAX: 816-340-7962

INTERNET: www.americancentury.com


AMERICAN CENTURY CALIFORNIA TAX-FREE
AND MUNICIPAL FUNDS


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

THIS  REPORT AND THE  STATEMENTS  IT  CONTAINS  ARE  SUBMITTED  FOR THE  GENERAL
INFORMATION OF OUR  SHAREHOLDERS.  THE REPORT IS NOT AUTHORIZED FOR DISTRIBUTION
TO  PROSPECTIVE  INVESTORS  UNLESS  PRECEDED  OR  ACCOMPANIED  BY  AN  EFFECTIVE
PROSPECTUS.

(c) 1998 AMERICAN CENTURY SERVICES CORPORATION
FUNDS DISTRIBUTOR, INC.


[recycled logo]
Recycled


[back cover]

[40 Years]
Four Decades of Serving Investors
40 Years
American Century
1958-1998

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



9810                              (c)1998 American Century Services Corporation
SH-BKT-13908                                            Funds Distributor, Inc.
<PAGE>
[front cover]                                                    August 31, 1998

SEMIANNUAL REPORT
- -----------------
AMERICAN CENTURY

   [graphic of stairs]

BENHAM GROUP
- ------------------------------------
CALIFORNIA HIGH-YIELD MUNICIPAL
CALIFORNIA INSURED TAX-FREE

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


A Note from the Founder
- --------------------------------------------------------------------------------

     On our 40th  anniversary,  I would  personally  like to express my profound
appreciation  for the  confidence  you have shown in  American  Century.  We are
grateful for the opportunity to manage your money,  and we will do our utmost to
continue to meet your expectations and justify your confidence in us.

     I  founded  American  Century  on  the  belief  that  if we  can  make  you
successful,  you, in turn,  will make us successful.  That is the principle that
will guide us in the future.

     Sincerely,
     /s/James E. Stowers


About our New Report Design
- --------------------------------------------------------------------------------

Why We Changed

We're trying hard to be reader-friendly.  Our reports contain a lot of very good
information, from fund statistics and financials to Q&A's with fund managers. We
hope the new design will make the reports more  interesting  and  understandable
while helping you keep abreast of your fund's strategy and performance.

What's New

The reports are designed to be attractive and easy to use whether you're reading
them in depth or just skimming.

     New features include:

* Larger type size in many sections.
* Brief explanations of the financial statements.
* More prominent graphs and charts.
* Quotes in the margins to highlight report content.

THE BOTTOM LINE.

The new design  actually  costs  slightly less than the old one. We  reallocated
costs and eliminated a cover letter and the envelope that  previously  came with
your  report  enclosed.  This not only saves  money,  but  reduces the number of
mailing pieces you receive.

The new  reports  also use  roughly  the same  amount  of paper as the old ones.
Previously,  paper was trimmed  and thrown  away to produce  the smaller  report
size.

We believe we've come up with a more interesting,  informative and user-friendly
publication.

We hope you enjoy it.

[left margin]

Benham Group

California High-Yield Municipal
(BCHYX)

California Insured Tax-Free
(BCINX)

[40 Years logo]
Four Decades of Serving Investors
40 Years
American Century
1958-1998


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

     During the year ended August 31, 1998,  U.S.  interest rates fell as global
economic and financial  conditions  worsened.  Falling interest rates,  combined
with increased  demand,  sparked a rally in the municipal bond market.  Although
demand for municipal  bonds wasn't as strong as for Treasury bonds, it was still
enough to boost bond prices and put downward  pressure on yields. In California,
global  economic   weakness  began  to  infiltrate  the  strong  state  economy,
encouraging  investors  to  keep a  closer  watch  on the  financial  health  of
municipal bond issuers.

     Within this  environment,  the Benham California  High-Yield  Municipal and
Insured  Tax-Free funds continued to perform well.  Both funds provided  returns
that exceeded the average returns of their fund peers.

     The current market environment  illustrates the importance of a diversified
investment  portfolio.  While bonds  produced  positive  returns,  stock markets
worldwide suffered sharp declines.  Diversifying your assets among stocks, bonds
and money market funds can help  weatherproof  your portfolio against changes in
the economic or investment climate.

     On the corporate  front,  we have been  expanding the products and services
offered by our new American Century Brokerage.  Our brokerage operation offers a
wide range of investment options and features,  including individual securities,
mutual funds from hundreds of companies,  a Gold MasterCard  ATM/debit card, and
24-hour   telephone   and   Internet   access.   Call  our   Investor   Services
representatives or visit our Web site for more details.

     We also have a huge effort underway to prepare American  Century's computer
systems for the year 2000 (Y2K). A team of technology  professionals  is working
to address  Y2K-related  issues.  Through the rest of 1998 and 1999,  we will be
extensively  testing all of our systems,  including those involved with dividend
payments to verify the accuracy of dividend calculations and distributions.

     Finally,  we hope you like the new design of this report.  It's intended to
make the important information you need about your fund easier to find and read.

     We appreciate your investment with American Century.

Sincerely,

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


[right margin]

               Table of Contents
   Report Highlights ......................................................    2
   Market Perspective .....................................................    3
   Municipal Credit Review ................................................    4
CALIFORNIA HIGH-YIELD MUNICIPAL
   Performance Information ................................................    5
   Management Q&A .........................................................    6
   Portfolio Composition
   by Credit Rating .......................................................    7
   Portfolio Composition
   by Security Type .......................................................    8
   Schedule of Investments ................................................    9
CALIFORNIA INSURED TAX-FREE
   Performance Information ................................................   15
   Management Q&A .........................................................   16
   Portfolio Composition
   by Security Type .......................................................   17
   Portfolio Composition
   by Credit Rating .......................................................   18
   Schedule of Investments ................................................   19
FINANCIAL STATEMENTS
   Statements of Assets and
   Liabilities ............................................................   22
   Statements of Operations ...............................................   23
   Statements of Changes
   in Net Assets ..........................................................   24
   Notes to Financial
   Statements .............................................................   25
   Financial Highlights ...................................................   27
   Report of Independent
   Accountants ............................................................   29
OTHER INFORMATION
   Background Information
      Investment Philosophy
      and Policies ........................................................   30
      Comparative Indices .................................................   30
      Credit Rating
      Guidelines ..........................................................   30
      Investment Team
      Leaders .............................................................   30
   Glossary ...............................................................   31


                                                  www.americancentury.com      1


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

MARKET PERSPECTIVE

*   Municipal bonds posted moderate gains during the year ended August 31, 1998,
    as interest rates fell across the board.

*   A global economic  slowdown erased fears about inflation and created greater
    investor demand for bonds.

*   Although economic  conditions  favored bonds, a 47% increase in new issuance
    limited the price gains of municipal securities.

*   The gap between  Treasury and municipal bond yields narrowed to its tightest
    level  since  1986,  making  municipal  yields  extremely  attractive  on  a
    tax-adjusted basis.

CREDIT REVIEW

*   A robust state economy and healthy tax revenues  enhanced  municipal  credit
    quality in California.

*   Strong job growth and consumer  spending  helped the state  produce a budget
    surplus.

*   Recent  slowing in  California's  economy has made us cautiously  optimistic
    about credit conditions going forward.

CALIFORNIA HIGH-YIELD MUNICIPAL

*   The fund's yield and one-year  return beat the average  California debt fund
    by a wide margin.

*   Between new investments (fund assets increased by 60%) and the proceeds from
    a number  of called  bonds  (those  refinanced  by the  issuer  and paid off
    early),  the fund had a  substantial  amount  of cash to  invest  in a lower
    interest rate environment.

*   We put much of this  money to work in  non-rated  bonds,  where we found the
    best values.

*   We  continued  to  participate  in private  placements  and  limited  public
    offerings.  We typically  work with the issuer to help structure the bond to
    meet our strict credit standards.

*   Looking  ahead,  we plan to maintain a core position in non-rated  bonds and
    will keep a wary eye on the strength of the California economy.

CALIFORNIA INSURED TAX-FREE

*   The fund's yield and  one-year  return beat the average  California  insured
    debt fund.

*   California  Insured  Tax-Free was  positioned  to take  advantage of falling
    interest  rates,  with  a  longer  duration  (a  measure  of  interest  rate
    sensitivity)  and an emphasis on discount bonds (bonds that trade below face
    value because they pay lower-than-prevailing interest rates).

*   We concentrated  our investments in tax revenue bonds,  which performed well
    because of the strong California economy.

*   We expect interest rates to continue to decline,  so we plan to maintain the
    fund's current positioning going forward.

[left margin]

             CALIFORNIA HIGH-YIELD
                   MUNICIPAL
                    (BCHYX)
TOTAL RETURNS:                AS OF 8/31/98
    6 Months                         4.09%*
    1 Year                            9.35%
NET ASSETS:                  $303.8 million
30-DAY SEC YIELD:                     4.61%
INCEPTION DATE:                    12/30/86


              CALIFORNIA INSURED
                   TAX-FREE
                    (BCINX)
TOTAL RETURNS:                AS OF 8/31/98
    6 Months                         3.75%*
    1 Year                            8.96%
NET ASSETS:                  $215.5 million
30-DAY SEC YIELD:                     4.17%
INCEPTION DATE:                    12/30/86

* Not annualized.

See  Total  Returns  on pages 5 and 15.  Investment  terms  are  defined  in the
Glossary on page 31.


2       1-800-345-2021


Market Perspective from Randall W. Merk
- --------------------------------------------------------------------------------
/photo of Randall W. Merk/
Randall W. Merk, director of fixed-income investing at American Century

SOLID MUNICIPAL BOND PERFORMANCE

     Municipal  securities  posted  solid gains during the year ended August 31,
1998. Interest rates declined and bond prices rose as a global economic slowdown
alleviated inflation fears.

     Municipal  bond  yields  fell  across the board,  with most of the  decline
occurring in late 1997.  Long-term  municipal bonds, which are most sensitive to
interest rate changes, reaped the biggest price gains as rates fell.

WEAKENING ECONOMIC CONDITIONS

     The catalyst for falling  interest  rates was a series of financial  crises
around the world that threatened to apply the brakes to global economic  growth.
Asia's financial  problems came to light in late 1997 and mushroomed in 1998. By
mid-1998, the contagion had spread to Russia and Latin America.

     One effect of these  crises was to calm fears that  inflationary  pressures
were  intensifying.  This was especially welcome in the U.S., where unemployment
was  at  a  28-year  low  and  consumer  spending  remained  very  robust.   The
tranquilizing  effect on  inflation  allowed  the  Federal  Reserve  to keep its
short-term interest rate barometer steady during the period.

     The global  economic  problems  wreaked havoc on stock  markets  worldwide.
Investors  grew  concerned  about the outlook  for  corporate  profits,  and the
ensuing stock market volatility created greater demand for bonds.

TREASURYS BEAT MUNICIPALS

     The biggest  benefactor  of the global  turmoil was the U.S.  Treasury bond
market.  Investors  fleeing  volatile  markets looked for safe haven in Treasury
bonds. This "flight to quality" sent U.S. interest rates down to levels not seen
in three  decades--the  30-year  Treasury  bond  yield  ended  the  period at an
all-time low of 5.27%.

     The demand for municipal  bonds,  while remaining firm,  couldn't keep pace
with the growing appetite for Treasurys.  International  investors don't benefit
from the tax-exempt  status of municipal  securities,  so they prefer the higher
yields and greater liquidity offered by Treasurys.

     In addition, municipal bond issuance expanded over the past year as issuers
scrambled to take advantage of low interest rates. For the first eight months of
1998, new issue volume was up 47% compared with the previous year.

     As a result, Treasury bonds outperformed municipals, and the difference--or
spread--between  the  yields  of  Treasury  and  municipal  securities  narrowed
substantially (see the accompanying  chart). By the end of the period, the yield
spread between a 10-year Treasury and a 10-year  municipal bond was the tightest
it's been in 12 years.

      At these levels,  municipal bonds offer extremely  attractive  yields on a
tax-equivalent  basis.  As of August 31, an investor in the highest  federal tax
bracket could earn a tax-adjusted  yield of more than 7% on a 10-year  municipal
bond, well above the 5% yield on the 10-year Treasury.

[right margin]

"LONG-TERM MUNICIPAL BONDS, WHICH ARE MOST SENSITIVE TO INTEREST RATE CHANGES,
REAPED THE BIGGEST PRICE GAINS AS RATES FELL."

[line chart - data below]

10-YEAR TREASURY YIELDS VS. 10-YEAR AAA MUNICIPAL YIELDS

            10-Year Treasury      10-Year AAA Municipal
8/31/97           6.33%                 4.72%
9/30/97           6.10%                 4.59%
10/31/97          5.83%                 4.54%
11/30/97          5.85%                 4.59%
12/31/97          5.74%                 4.41%
1/31/98           5.51%                 4.34%
2/28/98           5.61%                 4.37%
3/31/98           5.65%                 4.45%
4/30/98           5.67%                 4.54%
5/31/98           5.55%                 4.44%
6/30/98           5.44%                 4.40%
7/31/98           5.49%                 4.42%
8/31/98           4.97%                 4.27%

Source: Bloomberg Financial Markets

"BY THE END OF THE PERIOD, THE YIELD SPREAD BETWEEN A 10-YEAR TREASURY AND A
10-YEAR MUNICIPAL BOND WAS THE TIGHTEST IT'S BEEN IN 12 YEARS."


                                               www.americancentury.com        3


California Municipal Credit Review
- --------------------------------------------------------------------------------

     Municipal credit  conditions in California  continued to improve during the
year ended  August 31,  1998.  The robust  state  economy  helped  increase  tax
revenues  for state and  local  governments.  However,  recent  economic  trends
indicate a slowing in California's  economy, so we are cautiously positive about
state credit conditions going forward.

CALIFORNIA ECONOMY IN HIGH GEAR

     Economic  growth in California was extremely  healthy during the past year.
The state  remains the hub of  leading-edge  technology  firms,  and it has also
benefited from vibrant tourism and entertainment industries.  Although the Asian
financial  crisis  began to hurt the state's  exports in late 1997,  other large
trading  partners--especially  Mexico and  Europe--picked up the slack,  helping
exports grow overall during the period.  Strong demand for housing fueled a boom
in the construction industry, which experienced the largest employment growth in
the state.

     California  jobs grew by 3.5%  during the first half of 1998,  compared  to
2.6%  nationally.  The  unemployment  rate in 15 counties  fell below 5%,  while
statewide unemployment hit its lowest level since the mid-1980s.  Job growth was
strongest in southern  California--Los  Angeles  County alone added 100,000 jobs
between  July  1997 and  July  1998,  and  four out of the five  fastest-growing
metropolitan areas are in the Southland.

     One of the biggest  benefactors of California's hearty economy has been the
state's general fund. The state budget is very economically  dependent,  relying
on  income  and  sales  tax  revenues  for  much  of  its  funding.   Thanks  to
higher-than-expected tax revenues, California erased its accumulated deficit and
produced a  surplus.  The state put a portion  of the  surplus  in an  emergency
reserve  fund for periods of economic  uncertainty;  the  remainder  allowed the
state to cut vehicle licensing fees and reinstate some tax credits.

CHANGES ON THE HORIZON

     Recently,  we've seen evidence that the state's economy has started to slow
down. Six of the state's 10 largest  foreign  trading  partners are in Asia, and
other crucial  export  markets--Mexico,  Canada,  Europe--are  also  struggling.
Although  foreign  exports  make up only 5% of the state's  economy,  California
businesses  also  compete  domestically  with  cheaper  imports  from  Asia  and
elsewhere.

     The San Francisco Bay Area, which is more  export-oriented and dominated by
technology  companies,  is already feeling the strain.  Many high-tech companies
are beginning to cut costs (and jobs) in order to remain competitive.

THE OUTLOOK

     After one of the most severe downturns in the state's  history,  California
has  experienced  explosive  economic  growth  over the last  few  years.  Going
forward,  however,  forecasts are calling for slower but more sustainable levels
of growth.

     As a result  of  fundamental  changes  over the past  decade,  the  state's
economy is more  diversified  and better able to withstand  economic  downturns.
However,  continued  dependence on  economically  sensitive  revenues leaves the
state's  recently  improved  financial  position   vulnerable  to  a  pronounced
slowdown.

     From a long-term perspective,  we're still positive on California's economy
and  credit  conditions,  but  we're  cautious  over the near  term  because  of
uncertainty  about the impact that the global  economic  crisis will have on the
state.

[left margin]

"ECONOMIC GROWTH IN CALIFORNIA WAS EXTREMELY HEALTHY DURING THE PAST YEAR."

[line chart - data below]

EMPLOYMENT GROWTH
              California           U.S.
'91             -3.5%             -1.5%
'92              0.1%              0.3%
'93             -0.8%              1.8%
'94              1.7%              3.1%
'95              0.6%              2.7%
'96              1.4%              2.1%
'97              3.9%              2.5%
'98              2.4%              2.6%

Source: Employment Development Department, Bureau of Labor Statistics

"CALIFORNIA JOBS GREW BY 3.5% DURING THE FIRST HALF OF 1998, COMPARED TO 2.6%
NATIONALLY."


4       1-800-345-2021


<TABLE>
<CAPTION>
California High-Yield Municipal--Performance
- --------------------------------------------------------------------------------

TOTAL RETURNS AS OF AUGUST 31, 1998

                              INCEPTION 12/30/86
                          CALIFORNIA         LEHMAN LONG-TERM    CALIF. MUNICIPAL DEBT FUNDS(2)
                     HIGH-YIELD MUNICIPAL    MUNI BOND INDEX    AVERAGE RETURN    FUND'S RANKING
- -----------------------------------------------------------------------------------------------
<S>                      <C>                  <C>                  <C>               <C>                  
6 MONTHS(1) .............    4.09%                4.07%             3.27%              --
1 YEAR ..................    9.35%               10.51%             8.51%         15 OUT OF 104
- -----------------------------------------------------------------------------------------------
AVERAGE ANNUAL RETURNS
3 YEARS .................    9.32%                9.52%             7.72%          6 OUT OF 90
5 YEARS .................    7.13%                7.08%             5.83%          4 OUT OF 58
10 YEARS ................    8.55%                9.44%             7.90%          5 OUT OF 30
</TABLE>

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

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

See pages 30-31 for more information about returns,  the comparative  index, and
Lipper fund rankings.

[mountain chart - data below]

GROWTH OF $10,000 OVER 10 YEARS

Value on 8/31/98:
California High-Yield Municipal              $22,729
Lehman Long-Term Municipal Bond Index        $24,850

                   California          Lehman Long-Term
              High-Yield Municipal   Municipal Bond Index

DATE               ACCT VALUE            ACCT VALUE
8/31/88              $10,000              $10,000
9/30/88              $10,158              $10,227
12/31/88             $10,407              $10,529
3/31/89              $10,596              $10,634
6/30/89              $11,061              $11,370
9/30/89              $11,101              $11,310
12/31/89             $11,413              $11,788
3/31/90              $11,533              $11,813
6/30/90              $11,832              $12,116
9/30/90              $11,695              $12,018
12/31/90             $12,058              $12,638
3/31/91              $12,339              $12,928
6/30/91              $12,680              $13,257
9/30/91              $13,164              $13,855
12/31/91             $13,375              $14,350
3/31/92              $13,566              $14,400
6/30/92              $14,045              $15,034
9/30/92              $14,388              $15,444
12/31/92             $14,600              $15,816
3/31/93              $15,098              $16,508
6/30/93              $15,739              $17,189
9/30/93              $16,313              $17,877
12/31/93             $16,525              $18,150
3/31/94              $15,775              $16,697
6/30/94              $15,898              $16,818
9/30/94              $16,055              $16,886
12/31/94             $15,639              $16,501
3/31/95              $16,762              $18,143
6/30/95              $17,096              $18,558
9/30/95              $17,516              $19,063
12/31/95             $18,504              $20,340
3/31/96              $18,225              $19,809
6/30/96              $18,560              $20,043
9/30/96              $19,108              $20,664
12/31/96             $19,595              $21,239
3/31/97              $19,544              $21,054
6/30/97              $20,357              $21,993
9/30/97              $21,049              $22,811
12/31/97             $21,653              $23,637
3/31/98              $21,887              $23,911
6/30/98              $22,308              $24,358
8/31/98              $22,729              $24,850

$10,000 investment made 8/31/88

The chart at left shows the growth of a $10,000  investment over 10 years, while
the chart below shows the fund's year-by-year performance.  The Lehman Long-Term
Municipal  Bond Index is  provided  for  comparison  in each  chart.  California
High-Yield  Municipal's  returns include operating expenses (such as transaction
costs and management  fees) that reduce returns,  while the returns of the index
do not. Past performance does not guarantee  future results.  Investment  return
and principal  value will  fluctuate,  and redemption  value may be more or less
than original cost.

[Bar chart - data below]

ONE-YEAR RETURNS OVER 10 YEARS (PERIODS ENDED AUGUST 31)

                          California           Lehman Long-Term
                      High Yield Municipal    Municipal Bond Index
08/31/88-08/31/89           10.88%                 13.44%
08/31/89-08/31/90            5.77%                  6.11%
08/31/90-08/31/91           10.75%                 13.47%
08/31/91-08/31/92           10.11%                 12.60%
08/31/92-08/31/93           12.61%                 14.76%
08/31/93-08/31/94            0.87%                 -2.05%
08/31/94-08/31/95            7.09%                  9.43%
08/31/95-08/31/96            8.02%                  6.88%
08/31/96-08/31/97           10.61%                 11.26%
08/31/97-08/31/98            9.35%                 10.51%


                                               www.americancentury.com        5


California High-Yield Municipal--Q&A
- --------------------------------------------------------------------------------

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

HOW DID  CALIFORNIA  HIGH-YIELD  MUNICIPAL  PERFORM DURING THE FISCAL YEAR ENDED
AUGUST 31, 1998?

     The  fund  has a  history  of  strong  returns,  and the  past  year was no
exception.  For the  year  ended  August  31,  California  High-Yield  Municipal
returned  9.35%,  compared with the 8.51% average return of the 104  "California
Municipal Debt Funds" tracked by Lipper Analytical Services. The fund's one-year
return  placed it in the top 15% of this group of funds.  (See the Total Returns
table on the previous page for other fund performance comparisons.)

YIELD IS A KEY ATTRACTION OF THIS FUND. HOW DID IT COMPARE?

     The fund's  30-day SEC yield* as of August 31 was 4.61%,  compared with the
3.95% yield of the average  California  municipal fund. Despite some challenges,
we've been able to maintain a yield that beat the average by a healthy margin.

WHAT SORT OF CHALLENGES DID YOU FACE?

     For one  thing,  a lot of new  money  came  into the fund  during  the past
year--California  High-Yield  Municipal's assets increased by nearly 60%, and we
had to invest this new cash in a lower interest rate environment.

     Second,  a number of the  portfolio's  bonds were called during the period.
Many municipal  bonds have a call feature that allows the issuer to pay back the
principal early, similar to a homeowner refinancing a mortgage. Falling interest
rates have  encouraged  many municipal  issuers to call their existing bonds and
"refinance" by issuing new ones at lower rates.  Some even  refinance  months or
years in advance of the call date just so they can take advantage of low rates.

     These "advanced refundings" can be good for the fund's total return because
the bonds often  appreciate in value--since  the issuer already has the money to
pay off the interest and principal, the credit quality of the bond goes up.

     However,  calls  generally  hurt the fund's yield  because the called bonds
typically have high interest rates.  California High-Yield Municipal had quite a
few bonds with rates of 7-8% called away during the fiscal year.

     Between new  investments  and the proceeds from called  bonds,  we had more
than $100 million to invest in the California  high-yield market over the course
of the year.  Unfortunately,  municipal  bond  yields were  falling,  and credit
spreads remained very tight.

WHAT'S A CREDIT SPREAD?

     A "spread" is the gap between the yields of  different  bonds,  so a credit
spread is the gap between  the yields of bonds with  different  credit  quality.
Lower-quality  bonds  traditionally  offer higher yields as compensation for the
additional  risk. The most common credit spread tracked by the municipal  market
is the spread between bonds rated AAA and BBB.

* Although California  High-Yield  Municipal'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 on the greater credit risk of
the securities in the fund's portfolio.

[left margin]

"DESPITE SOME CHALLENGES, WE'VE BEEN ABLE TO MAINTAIN A YIELD THAT BEAT THE
AVERAGE BY A HEALTHY MARGIN."

YIELDS AS OF AUGUST 31, 1998

30-DAY SEC YIELD                    4.61%

30-DAY TAX-EQUIVALENT YIELDS
34.70% TAX BRACKET                  7.06%
37.42% TAX BRACKET                  7.37%
41.95% TAX BRACKET                  7.94%
45.22% TAX BRACKET                  8.42%

PORTFOLIO AT A GLANCE
                                   8/31/98           8/31/97
NUMBER OF SECURITIES                 146               102
WEIGHTED AVERAGE
MATURITY                          20.8 YRS          20.3 YRS
AVERAGE DURATION                   7.9 YRS           7.5 YRS
EXPENSE RATIO                       0.54%             0.50%

Investment terms are defined in the Glossary on page 31.


6       1-800-345-2021


California High-Yield Municipal--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

     Just a few years ago,  a BBB bond  offered a yield  advantage  of 100 basis
points (1.00%--a basis point equals 0.01%) or more over a AAA bond with the same
maturity.  Six months ago, the spread had  narrowed to just 35-45 basis  points,
and by the end of May,  it was down to 25 basis  points.  To look at it  another
way, a AAA bond offered  roughly 95% of the yield of a  lower-quality  bond, but
with much less credit risk.

WHY WERE MUNICIPAL CREDIT SPREADS SO TIGHT?

     There were several reasons.  First, the strength of the California  economy
led to more credit  upgrades.  This was good for some of our bonds  because they
increased  in value  as a result  of their  upgrades,  but it also  reduced  the
outstanding supply of lower-rated bonds. In addition,  bond insurance has become
more prevalent in the municipal market;  many bonds that would normally be rated
BBB are now being issued with insurance and a AAA rating.

     On the demand side,  falling  interest rates led to a growing  appetite for
the higher yields of  lower-quality  bonds.  The combination of shrinking supply
and greater  demand  compressed  credit spreads and made it harder to find value
among lower-rated municipals.

SO YOU HAD A SIZABLE AMOUNT OF CASH TO INVEST IN AN UNFAVORABLE ENVIRONMENT.
WHAT DID YOU DO WITH IT?

     We  invested  some of it in AAA bonds  because  that was where  supply  was
heaviest.  But we also put a lot of the money to work in non-rated bonds,  where
we  thought we could find the best  values.  There was a great deal of  issuance
among non-rated securities, so yields were relatively attractive in this sector.

     And the  non-rated  area of the  market  is where  our  experienced  credit
research team can really shine.  Since  non-rated bonds are not evaluated by the
rating agencies, there's a lot of variability in credit quality.

     Our  credit  team was  able to roll up its  sleeves  and  find a number  of
non-rated  issues that offered nice yields while  meeting our  stringent  credit
standards.  We now have 40% of the fund's  portfolio in non-rated bonds, up from
about 30% a year ago.

WHAT EFFECT DID ALL OF THIS INVESTMENT ACTIVITY HAVE ON THE FUND'S DURATION?

     California High-Yield Municipal's duration extended slightly from 7.5 years
to 7.9  years  during  the  fiscal  year.  (Duration  measures  the  portfolio's
sensitivity to changes in interest rates.  The longer the fund's  duration,  the
greater the share price  fluctuates  when interest rates change.) As I mentioned
before, we were investing in a declining  interest rate environment,  so we were
buying lower-yielding municipal bonds. In general,  lower-yielding bonds tend to
have longer durations, and that contributed to the fund's duration increase.

     It's important to note that we manage the fund's duration very carefully so
that it remains  relatively neutral compared with its peers, and any investments
we make are  consistent  with  this  approach.  The  lengthening  of the  fund's
duration over the past year reflected a similar increase in the average duration
of the peer group.

[right margin]

"BETWEEN NEW INVESTMENTS AND THE PROCEEDS FROM CALLED BONDS, WE HAD MORE THAN
$100 MILLION TO INVEST IN THE CALIFORNIA HIGH-YIELD MARKET OVER THE COURSE OF
THE YEAR."

PORTFOLIO COMPOSITION BY CREDIT RATING
                   % OF FUND INVESTMENTS
                  AS OF             AS OF
                 8/31/98           2/28/98
AAA                26%               26%
AA                  9%               15%
A                  12%               14%
BBB                13%               14%
UNRATED            40%               31%

Ratings provided by Standard & Poor's.  See Credit Rating  Guidelines on page 30
for more information.

"OUR CREDIT TEAM WAS ABLE TO ROLL UP ITS SLEEVES AND FIND A NUMBER OF NON-RATED
ISSUES THAT OFFERED NICE YIELDS WHILE MEETING OUR STRINGENT CREDIT STANDARDS."


                                                 www.americancentury.com       7


California High-Yield Municipal--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

WHAT OTHER CHANGES DID YOU MAKE TO THE FUND'S PORTFOLIO?

     We    expanded    California    High-Yield    Municipal's    holdings    of
healthcare-related  securities,  such as hospital and retirement facility bonds.
We also  increased  our exposure to  land-based  bonds,  which help finance land
development and are backed by property tax revenues.  Both of these bond sectors
benefited from the strength of the California economy.

IN THE LAST REPORT IN FEBRUARY, YOU TALKED ABOUT YOUR INVOLVEMENT IN PRIVATE
PLACEMENTS AND LIMITED PUBLIC OFFERINGS. ARE YOU STILL PARTICIPATING IN THESE
DEALS?

     Yes. Bonds issued through  private  placements or limited public  offerings
are sold only to large  investors,  like mutual funds and  insurance  companies.
This is  another  area where we benefit  from a strong  credit  team--California
issuers come to us for help in structuring  these deals,  and we're able to have
some input on the creditworthiness and yield of the bonds.

     We were  involved in a few mobile  home park deals over the past year,  and
we're currently working on a multifamily housing deal.

LOOKING AHEAD, WHAT'S YOUR OUTLOOK FOR THE CALIFORNIA MUNICIPAL MARKET?

     We're a little more  cautious  than we were six months ago, but we're still
optimistic  about the market.  Despite  recent  evidence of slower  growth,  the
California  economy  appears  to have  plenty  of life  in it,  and the  state's
fundamental credit situation remains positive.

     In addition,  municipal  bond yields are  currently  very  attractive  when
compared with the Treasury bond market.  On an after-tax basis,  municipal bonds
even make sense for investors in the lowest tax brackets. Increased demand would
be favorable for municipal bond prices.

     However,  the Asian  financial  crisis may cause  further  slowdowns in the
California  economy.  As a result, we could see credit spreads begin to widen at
some point.  Although  wider credit spreads would make the yields of lower-rated
bonds more attractive, they would also hurt the prices of lower-quality bonds.

GIVEN YOUR OUTLOOK, WHAT ARE YOUR PLANS FOR CALIFORNIA HIGH-YIELD MUNICIPAL OVER
THE NEXT SIX MONTHS?

     We'll continue to manage the fund the way we always have--careful  security
selection based on thorough  bond-by-bond  analysis.  We plan to maintain a core
position in non-rated bonds,  seeking out attractive values with the help of our
credit research team.

     One of the challenges we may face going forward is the possibility that, if
interest  rates  remain  low,  more of our  bonds  will be  refinanced  by their
issuers.  We'll try to  anticipate  these  potential  refinancings  and look for
attractive places to reinvest the proceeds.

[left margin]

"WE'RE A LITTLE MORE CAUTIOUS THAN WE WERE SIX MONTHS AGO, BUT WE'RE STILL
OPTIMISTIC ABOUT THE MARKET."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF AUGUST 31, 1998
Revenue                    47%
Land-Secured               28%
COPs/Leases                14%
Prerefunded/ETM             8%
Other                       3%

AS OF FEBRUARY 28, 1998
Revenue                    44%
Land-Secured               36%
COPs/Leases                11%
Prerefunded/ETM             4%
Other                       5%

Security types are defined on page 31.


8       1-800-345-2021


High-Yield Municipal--Schedule of Investments
- --------------------------------------------------------------------------------

AUGUST 31, 1998

Principal Amount                                                     Value
- --------------------------------------------------------------------------------
MUNICIPAL SECURITIES
              $2,000,000   Alameda Public Financing Auth.
                              Local Agency Rev., Series
                              1996 A, (Community Facility
                              District No. 1), 7.00%, 8/1/19        $2,224,980
               1,000,000   American Canyon Joint Powers
                              Financing Auth. Lease Rev.,
                              (Civic-Recreation Facilities),
                              6.40%, 6/1/22                          1,059,800
               1,000,000   Association of Bay Area
                              Governments Finance Auth.
                              Rev. COP, (Episcopal Homes
                              Foundation), 5.125%, 7/1/18              991,330
               3,000,000   Association of Bay Area
                              Governments Finance Auth.
                              Rev. COP, (Rhoda Haas
                              Goldman Plaza), 5.125%,
                              5/15/23 (California Mortgage
                              Insurance)                             2,970,720
                 700,000   Bishop, Escalon & Lemoore Cities
                              COP, Series 1991 A, 7.70%,
                              5/1/11                                   747,635
               1,000,000   Blythe Financing Auth. Water Rev.,
                              5.75%, 4/1/28                          1,022,450
               1,800,000   Blythe Redevelopment No. 1 Tax
                              Allocation, 5.80%, 5/1/28              1,876,626
               3,000,000   Brawley COP, (Water System
                              Improvement), 6.40%,
                              12/1/26(1)                             3,515,760
               1,285,000   Brea Community Facilities District
                              Special Tax, (Olinda Heights
                              No. 1997-1), 5.80%, 9/1/28             1,293,301
               2,000,000   Brea Olinda Unified School
                              District Community Facilities
                              Special Tax, (No. 95-1),
                              5.75%, 9/1/28                          2,031,440
               2,500,000   Brentwood Infrastructure
                              Refinancing Auth. Rev., Series
                              1998-1, 5.875%, 9/2/28                 2,505,975
               1,540,000   Brisbane COP, (Capital
                              Improvement Refinancing),
                              6.00%, 4/1/18(1)                       1,623,807
               1,000,000   Cabrillo Unified School District
                              GO, Series 1996 A, 5.95%,
                              8/1/17 (AMBAC)(2)                        393,260
               1,850,000   California Community College
                              Financing Auth. Lease Rev.,
                              Series 1998 A, 4.625%,
                              9/1/23 (MBIA)                          1,751,617
               5,000,000   California Department Water
                              Resource Center Various
                              Project Rev., Series 1995 O,
                              (Water Systems), 4.75%,
                              12/1/25                                4,811,100
                 500,000   California Educational Facilities
                              Auth. Rev., (California Lutheran
                              University), 7.375%, 12/1/16             538,370

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

              $2,000,000   California Educational Facilities
                              Auth. Rev., (Los Angeles College
                              Chiropractic), 5.60%, 11/1/17         $2,083,320
               1,000,000   California Educational Facilities
                              Auth. Rev., (Mills College),
                              6.875%, 9/1/22                         1,131,720
               3,350,000   California Educational Facilities
                              Auth. Rev., (St. Mary's College),
                              4.75%, 10/1/20 (MBIA)                  3,232,147
               2,215,000   California Educational Facilities
                              Auth. Rev., (University of San
                              Diego), 4.75%, 10/1/15
                              (AMBAC)                                2,200,824
               1,000,000   California Educational Facilities
                              Auth. Rev., Series 1993 B,
                              (Pooled College and University
                              Financing), 6.125%, 6/1/09             1,072,670
               2,500,000   California Educational Facilities
                              Auth. Rev., Series 1998 A,
                              (Pooled College and University
                              Projects), 5.625%, 7/1/23              2,554,000
               4,000,000   California Health Facilities
                              Financing Auth. Rev., Series
                              1989 A, (Kaiser Permanente),
                              7.15%, 10/1/12 (AMBAC)(2)              2,015,960
               1,000,000   California Health Facilities
                              Financing Auth. Rev., Series
                              1998 A, (Casa De Las
                              Campanas), 5.25%, 8/1/20
                              (California Mortgage Insurance)        1,008,030
                 160,000   California Housing Finance
                              Agency Home Mortgage Rev.,
                              Series 1988 B, 8.60%, 8/1/19             163,200
                 550,000   California Housing Finance
                              Agency Home Mortgage Rev.,
                              Series 1989 B, 8.00%, 8/1/29             571,896
                 400,000   California Housing Finance
                              Agency Home Mortgage Rev.,
                              Series 1990 C, 7.60%, 8/1/30             420,396
               1,955,000   California Housing Finance
                              Agency Home Mortgage Rev.,
                              Series 1997 B, 6.10%, 2/1/28
                              (MBIA)                                 2,085,320
               1,500,000   California Housing Finance
                              Agency Home Mortgage Rev.,
                              Series 1997 E, 6.10%, 8/1/29
                              (AMBAC)                                1,603,560
               3,500,000   California Housing Finance
                              Agency Multi-Unit Rental Rev.,
                              Series 1992 C-II, 6.875%,
                              8/1/24                                 3,740,520
               3,455,000   California Housing Finance
                              Agency Multi-Family Housing
                              Rev. Bonds, Series 1997 A,
                              5.95%, 8/1/28 (MBIA)                   3,641,294
               2,500,000   California Housing Finance
                              Agency Single-Family Mortgage
                              Rev., Series 1997 A-1, 5.95%,
                              8/1/16                                 2,661,625

See Notes to Financial Statements


                                                www.americancentury.com       9


High-Yield Municipal--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

              $3,000,000   California Housing Finance
                              Agency Single-Family Mortgage
                              Rev., Series 1997 C-2, 5.65%,
                              2/1/25 (FHA, VA)                      $3,108,690
                 400,000   California Public Capital
                              Improvements Financing Auth.
                              Rev., Series 1988 A, (Pooled
                              Project), 8.50%, 3/1/18                  409,472
               3,160,000   California State Department of
                              Water Resource Rev., Series
                              1997 S, (Central Valley Project),
                              5.00%, 12/1/19                         3,141,356
               3,665,000   California State GO, 6.75%,
                              9/1/09(2)                              2,240,341
               1,575,000   California State Local Government
                              Financing Auth. Rev., (Marin
                              Valley Mobile Home Park),
                              7.50%, 10/1/24 (Acquired
                              3/13/97, Cost $1,575,000)(3)           1,688,274
               2,000,000   California State Public Works
                              Board Lease Rev. COP, Series
                              1993 D, (Department of
                              Corrections State Prisons),
                              5.25%, 6/1/15 (FSA)                    2,129,040
               7,000,000   California Statewide Communities
                              Development Auth. Lease Rev.,
                              Series 1997 A, (United Airlines),
                              5.70%, 10/1/33                         7,229,110
               1,000,000   California Statewide Communities
                              Development Auth. Rev. COP,
                              Series 1996 A, (Insurance
                              Health Facility, San Gabriel
                              Valley), 5.50%, 9/1/14
                              (California Mortgage Insurance)        1,036,180
                 250,000   Clayton Improvement Bond Act
                              1915 Special Assessment,
                              (Oakhurst Assessment District),
                              8.00%, 9/2/14                            260,210
                  65,000   Clayton Improvement Bond Act
                              1915 Special Assessment,
                              Series 1988 A, (Oakhurst
                              Assessment District), 8.40%,
                              9/2/10                                    67,856
               4,500,000   Colton Public Financing Auth. Rev.,
                              (Electric System), 7.50%,
                              10/1/03, Prerefunded at
                              101% of Par(4)                         5,272,689
               1,320,000   Compton Sewer Rev., 5.375%,
                              9/1/23                                 1,323,472
                 750,000   Contra Costa County Public
                              Financing Auth. Tax Allocation
                              Rev., Series 1992 A, 7.10%,
                              8/1/22                                   825,750
                 680,000   Corcoran COP, 8.75%, 6/1/16
                              (Acquired 4/28/92, Cost
                              $680,000)(3)                             753,753
               4,000,000   Corona Community Facilities
                              District Special Tax, 4.70%,
                              9/1/20 (MBIA)                          3,856,480

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

              $3,500,000   Culver City Redevelopment
                              Financing Auth. Rev. Tax
                              Allocation, 4.60%, 11/1/20
                              (AMBAC)                               $3,309,005
               1,000,000   Davis Community Facility District
                              No. 1991-2 Special Tax, Series
                              1992 B, 7.80%, 9/1/02,
                              Prerefunded at 103% of Par(4)          1,172,740
               1,500,000   Del Mar Race Track Auth. Rev.,
                              6.20%, 8/15/11                         1,634,580
               5,000,000   East Bay Municipal Utility District
                              Water System Rev., 4.75%,
                              6/1/34 (MBIA)                          4,812,550
               1,200,000   Escondido Improvement Bond Act
                              1915 GO, (Assessment District
                              No. 86-1-R), 5.625%, 9/2/18            1,211,509
               3,000,000   Folsom Public Financing Auth.
                              Rev., Series 1997 A, 6.875%,
                              9/2/19                                 3,100,440
               1,500,000   Folsom Special Tax, (Community
                              Facility District No. 7), 7.25%,
                              9/1/21                                 1,631,385
               2,500,000   Fontana Redevelopment Agency
                              Tax Allocation, Series 1994 B,
                              (Jurupa Hills), 7.70%, 1/1/19          2,805,250
               1,040,000   Foothill-De Anza Community
                              College District COP, (Campus
                              Center), 7.35%, 3/1/07                 1,151,831
               2,500,000   Foster City Redevelopment
                              Agency Tax Allocation, (Metro
                              Center), 6.75%, 9/1/20                 2,795,075
               3,065,000   Fremont Public Financing Auth.
                              Rev., Series 1998 A, 5.50%,
                              9/2/11                                 3,069,230
               1,185,000   Gateway Improvement Auth. Rev.,
                              Series 1995 A, (Marin City
                              Community Facility), 7.75%,
                              9/1/25                                 1,465,786
               2,000,000   Industry Urban Redevelopment
                              Agency Tax Allocation,
                              (Project 3), 6.90%, 11/1/16            2,196,200
                 985,000   Irvine Improvement Bond 1915
                              Special Assessment, Series
                              1992 A, (District No. 89-9),
                              7.40%, 9/2/17                          1,017,131
               5,000,000   Kern Community College District
                              COP, 5.00%, 1/1/25 (MBIA)(5)           4,945,500
               1,000,000   La Mesa Improvement Bond Act
                              1915 Special Assessment,
                              (Limited Obligation, District
                              No. 98-1), 5.75%, 9/2/23               1,011,420
               2,000,000   La Mirada Redevelopment Agency
                              Special Tax Rev., (Community
                              Facilities District No. 89-1),
                              5.70%, 10/1/20                         2,024,120
               1,000,000   Lake Elsinore School Financing
                              Auth. Rev., 6.125%, 9/1/19             1,067,810

                                              See Notes to Financial Statements


10      1-800-345-2021


High-Yield Municipal--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

              $1,000,000   Lake Elsinore Unified School
                              District Community Facilities
                              Special Tax, (No. 88-1), 8.25%,
                               9/1/16                               $1,090,440
               1,000,000   Long Beach Industrial
                              Development Rev., Series
                              1998 A, (CSU Foundation),
                              5.25%, 2/1/13                          1,015,410
               3,590,000   Long Beach Water Rev., Series
                              1997 A, 5.00%, 5/1/24 (MBIA)           3,571,763
               2,000,000   Los Angeles Community Facilities
                              District Special Tax, (Cascades
                              Business Park), 6.40%, 9/1/22          2,079,260
               4,600,000   Los Angeles County Public Works
                              Financing Auth. Rev., Series
                              1997 A, (Regional Park and
                              Open Space District), 5.00%,
                              10/1/19                                4,561,314
                  95,000   Los Angeles County Single-Family
                              Mortgage Rev., (GNMA
                              Mortgage, Issue B), 9.00%,
                              12/1/20 (GNMA)                           103,908
               1,000,000   Los Angeles County Transportation
                              Commission Sales Tax Rev.,
                              Series 1991 B, 6.50%, 7/1/13           1,083,450
                  20,000   Los Angeles Home Mortgage Rev.,
                              9.00%, 6/15/18                            20,174
               2,150,000   Los Angeles State Building Auth.
                              Lease Rev. COP, Series 1993 A,
                              5.625%, 5/1/11                         2,386,952
               2,000,000   Los Angeles Unified School
                              District GO, Series 1997 A,
                              5.00%, 7/1/21 (FGIC)                   1,990,420
               1,775,000   Los Angeles Wastewater System
                              Rev., Series 1993 D, 4.70%,
                              11/1/17 (FGIC)                         1,725,708
               2,020,000   Milpitas Improvement Bond Act
                              1915 GO, Series 1998 A,
                              (Local Improvement District 18),
                              5.85%, 9/2/18                          2,065,329
               4,145,000   Milpitas Improvement Bond Act
                              1915 Special Assessment,
                              (Local Improvement District 18),
                              5.65%, 9/2/14                          4,210,823
               3,000,000   Milpitas Improvement Bond Act
                              1915 Special Assessment,
                              Series 1996 A, (Local
                              Improvement District 18),
                              6.75%, 9/2/16                          3,261,270
               1,500,000   Modesto Irrigation District
                              Financing Auth. Rev., Series
                              1998 D, (Domestic Water),
                              4.75%, 9/1/22 (AMBAC)                  1,447,920
               2,000,000   Novato Community Facility District
                              No. 1 Special Tax, (Vintage
                              Oaks), 7.20%, 8/1/15                   2,193,840

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

              $5,000,000   Oceanside Mobile Home Park
                              Financing Auth. Rev., (Laguna
                              Vista Mobile Estates), 5.80%,
                              3/1/28                                $5,058,150
               1,000,000   Orange County Community
                              Facilities District No. 86-2
                              Special Tax, Series 1998 A,
                              (Rancho Santa Margarita),
                              5.55%, 8/15/17                         1,011,430
               1,000,000   Orange County Community
                              Facilities District No. 87-5E
                              Special Tax, Series 1993 A,
                              7.30%, 8/15/18                         1,088,810
               1,000,000   Pioneer Union Elementary School
                              District GO, 7.50%, 8/1/14             1,067,370
                 880,000   Pittsburg Assessment District
                              90-1 Special Assessment,
                              (Oak Hills), 7.75%, 9/2/20               906,506
               1,500,000   Pittsburg Assessment District 92-1
                              Special Assessment, (Village at
                              New York Landing), 8.00%,
                              9/2/22                                 1,545,180
               1,645,000   Pittsburg Infrastructure Financing
                              Auth. Rev. Improvement Special
                              Assessment, Series 1998 A,
                              5.55%, 9/2/16                          1,663,260
               3,500,000   Pittsburg Redevelopment Agency
                              Tax Allocation, (Los Medanos
                              Community Development),
                              6.25%, 8/1/26                          3,801,490
               5,000,000   Pomona Improvement Bond Act
                              1915 Special Assessment, (Rio
                              Rancho Assessment District
                              294), 7.50%, 9/2/21                    5,488,100
                 475,000   Pomona Public Financing Auth.
                              Rev., Series 1994 L, (Southwest
                              Pomona Redevelopment),
                              5.70%, 2/1/04, Prerefunded at
                              102% of Par(4)                           523,460
               1,025,000   Pomona Public Financing Auth.
                              Rev., Series 1994 L, (Southwest
                              Pomona Redevelopment),
                              5.70%, 2/1/13                          1,073,811
               1,305,000   Poway Community Facilities
                              District Special Tax, (No. 88-1,
                              Parkway Business Center),
                              6.75%, 8/15/15                         1,432,316
               2,250,000   Rancho Mirage Joint Powers
                              Financing Auth. COP,
                              (Eisenhower Memorial Hospital),
                              7.00%, 3/1/02, Prerefunded at
                              102% of Par(4)                         2,526,098
               1,815,000   Redondo Beach Public Financing
                              Auth. Rev., (South Bay Center
                              Redevelopment), 7.125%,
                              7/1/26                                 2,035,940
               1,000,000   Richmond Joint Powers Financing
                              Auth. Rev. COP, Series 1995 A,
                              5.25%, 5/15/13                         1,033,340

See Notes to Financial Statements


                                                www.americancentury.com       11


High-Yield Municipal--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

              $3,165,000   Richmond Redevelopment Agency
                              Tax Allocation, Series 1998 A,
                              (Harbour Redevelopment),
                              4.75%, 7/1/23 (MBIA)                  $3,061,694
                 500,000   Roseville Community Facilities
                              District No. 2 Special Tax,
                              8.25%, 9/1/21                            553,225
               2,200,000   Sacramento County Improvement
                              Bond Act 1915 Special
                              Assessment, (Sunrise/Cordova
                              Reassessment), 5.30%, 9/2/09           2,219,536
                 635,000   Sacramento County Special Tax,
                              (Community Facilities District
                              No. 1), 5.60%, 9/1/07                    659,498
                 645,000   Sacramento County Special Tax,
                              (Community Facilities District
                              No. 1), 5.70%, 9/1/08                    673,328
               2,250,000   Sacramento County Special Tax,
                              (Community Facilities District
                              No. 1), 5.70%, 12/1/20                 2,275,673
               1,500,000   Sacramento County Special Tax,
                              (Community Facilities District
                              No. 1), 6.30%, 9/1/21                  1,581,210
               3,000,000   Sacramento Municipal Utility
                              District Electric Rev., Series
                              1993 G, 4.75%, 9/1/21 (MBIA)           2,890,230
               3,970,000   Sacramento Municipal Utility
                              District Electric Rev., Series
                              1997 K, 5.25%, 7/1/24
                              (AMBAC)                                4,199,188
               1,400,000   Salinas COP, Series 1997 A,
                              (Capital Improvement), 5.70%,
                              10/1/28                                1,464,946
                 750,000   Salinas Improvement Bond Act
                              1915 Special Assessment,
                              (District No. 90-1, Series
                              C-185), 5.45%, 9/2/13                    751,905
               1,000,000   Salinas Improvement Bond Act
                              1915 Special Assessment,
                              (District No. 90-1, Series
                              C-185), 5.50%, 9/2/14                  1,001,580
               1,920,000   Salinas Improvement Bond Act
                              1915 Special Assessment,
                              (Harden Ranch Assessment
                              District 94-1), 6.875%, 9/2/11         2,046,624
               2,000,000   San Diego Certificates of
                              Undivided Interest Water Utility
                              Fund System Rev., 4.75%,
                              8/1/28 (FGIC)                          1,930,260
               1,000,000   San Diego Community Facilities
                              District No. 1 Special Tax, Series
                              1995 B, 7.10%, 9/1/20                  1,198,790
               3,990,000   San Diego County Improvement
                              Bond Act 1915 GO, 6.25%,
                              9/2/12                                 4,123,027
               4,000,000   San Francisco Bay Area Rapid
                              Transit District Sales Tax Rev.,
                              4.75%, 7/1/23 (AMBAC)                  3,872,240

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

              $1,500,000   San Francisco City & County
                              Airport Commission International
                              Airport Rev., 5.90%, 5/1/26           $1,598,775
               7,810,000   San Francisco Community
                              College District COP, Series
                              1998 A, 5.95%, 7/1/18                  7,811,172
               1,780,000   San Jose Finance Auth. Rev. COP,
                              Series 1993 C, (Convention
                              Center), 6.30%, 9/1/09                 1,917,078
               1,000,000   San Marcos Public Facilities Auth.
                              Rev., 5.80%, 9/1/27                    1,005,580
               5,000,000   San Marcos Public Facilities Auth.
                              Rev., Series 1993 A, (Civic
                              Center), 6.20%, 8/1/22                 5,189,300
               2,365,000   San Marcos Redevelopment
                              Agency Tax Allocation, Series
                              1998 A, (Affordable Housing),
                              5.65%, 10/1/28                         2,428,595
               1,540,000   San Mateo County Joint Powers
                              Auth. Lease Rev., Series
                              1997 A, 5.00%, 7/15/22
                              (FSA)                                  1,531,407
               5,000,000   Santa Ana COP, (City Hall
                              Expansion), 4.70%, 1/1/28
                              (FSA)                                  4,762,750
               3,000,000   Santa Barbara County Tax and
                              Rev. Anticipation Notes, 4.50%,
                              10/1/99                                3,032,610
               1,500,000   Santa Rosa Improvement Bond
                              Act 1915 Special Assessment,
                              Series 1998 A, (Skyhawk
                              Assessment District), 5.75%,
                              9/2/20                                 1,525,875
               3,000,000   South Orange County Public
                              Financing Auth. Special Tax
                              Rev., Series 1994 B, (Jr. Lien),
                              7.25%, 9/1/13                          3,060,000
               1,615,000   South San Francisco
                              Redevelopment Agency Tax
                              Allocation, 7.60%, 9/1/18              1,764,048
                 480,000   Southern California Housing
                              Finance Auth. Single-Family
                              Mortgage Rev., Series 1991 A,
                              7.35%, 9/1/24 (GNMA, FNMA)               507,014
                 500,000   Southern California Public Power
                              Auth. Rev., (Pooled Project),
                              6.75%, 7/1/10 (FSA)                      611,080
               2,400,000   Southern California Public Power
                              Auth. Rev., (Transmission),
                              6.35%, 7/1/14 (MBIA)(2)                1,127,280
               1,250,000   Southern California Public Power
                              Auth. Rev., (Transmission),
                              6.35%, 7/1/15 (MBIA)(2)                  548,388
               2,000,000   Stockton Community Facilities
                              District Special Tax Rev., Series
                              1998 A, (Mello Roos-Weston
                              Ranch), 5.80%, 9/1/14                  2,057,300

                                              See Notes to Financial Statements


12      1-800-345-2021


High-Yield Municipal--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

              $1,100,000   Stockton Community Facilities
                              District Special Tax Rev., Series
                              1998 A, (Mello Roos-Weston
                              Ranch), 6.00%, 9/1/24                 $1,135,464
               2,000,000   Stockton East Water District COP,
                              Series 1997 A, 4.75%, 4/1/22
                              (AMBAC)                                1,925,760
               1,770,000   Tehama Community COP, (Social
                              Services Building), 7.00%,
                              10/1/20                                2,109,875
               1,655,000   Torrance Hospital Rev., (Little
                              County of Mary Hospital),
                              6.875%, 7/1/15                         1,809,627
               1,180,000   Torrance Redevelopment Agency
                              Tax Allocation, Series 1998 B,
                              5.625%, 9/1/28                         1,186,962
               2,260,000   Tracy Joint Powers Auth. Rev., (Jr.
                              Lien Assessment District 87-3),
                              6.375%, 9/2/11                         2,330,896
               1,565,000   Twentynine Palms Water District
                              COP, 7.10%, 8/1/22                     1,711,281
               2,000,000   Union City Special Tax,
                              (Community Facilities District
                              No. 1997-1), 5.80%, 9/1/28             2,042,660
               2,250,000   Vacaville Improvement Bond Act
                              1915 Special Assessment,
                              (Northeast Sector Assessment
                              District A), 7.00%, 9/2/22             2,413,575
               3,850,000   Vacaville Special Tax, Series
                              1998 C, (Community Facilities
                              District No. 2), 5.60%, 9/1/15         3,927,924
               2,000,000   West Contra Costa Unified School
                              District COP, 7.125%, 1/1/24           2,201,380
               1,000,000   Whittier Redevelopment Agency
                              Tax Allocation, (Whittier Blvd.),
                              5.70%, 11/1/19                         1,018,130
               1,520,000   Windsor Redevelopment Agency
                              Tax Allocation, 6.875%, 9/1/15         1,698,433
                                                                 ---------------
TOTAL MUNICIPAL SECURITIES--97.8%                                  296,865,303
                                                                 ---------------
   (Cost $281,669,202)

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

SHORT-TERM MUNICIPAL SECURITIES
              $2,000,000   California Health Facilities
                              Financing Auth. Rev., Series
                              1996 B, VRDN, 3.15%,
                              9/1/98 (AMBAC) (SBBPA:
                              ABN Amro Bank N.V.)                   $2,000,000
                 590,000   Richmond Joint Powers Financing
                              Port Auth. Term Lease Rev.,
                              VRDN, 3.35%, 9/1/98 (LOC:
                              Union Bank of California, N.A.)          590,000
               4,000,000   San Francisco City and County
                              Airport Commission International
                              Airport Rev., Series 1998 A-48,
                              VRDN, 3.95%, 9/1/98 (FGIC)
                              (SBBPA: National Westminster
                              Bank PLC) (Acquired 8/20/98,
                              Cost $4,000,000)(3)                    4,000,000
                                                                 ---------------
TOTAL SHORT-TERM
MUNICIPAL SECURITIES--2.2%                                           6,590,000
                                                                 ---------------
   (Cost $6,590,000)

TOTAL INVESTMENT SECURITIES--100.0%                               $303,455,303
                                                                 ===============
   (Cost $288,259,202)

See Notes to Financial Statements


                                                www.americancentury.com       13


High-Yield Municipal--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

NOTES TO SCHEDULE OF INVESTMENTS

AMBAC = AMBAC Assurance Corporation

COP = Certificates of Participation

FGIC = Financial Guaranty Insurance Co.

FHA = Federal Housing Authority

FNMA = Federal National Mortgage Association

FSA = Financial Security Assurance Inc.

GNMA = Government National Mortgage Association

GO = General Obligation

LOC = Letter of Credit

MBIA = MBIA Insurance Corp.

SBBPA = Standby Bond Purchase Agreement

VA = Veteran's Administration

VRDN = Variable Rate Demand Note.  Interest  reset date is indicated and used in
calculating the weighted  average  portfolio  maturity.  Rate shown is effective
August 31, 1998.

(1) Security,  or a portion  thereof,  has been segregated at the custodian bank
for a when-issued security.

(2) Security is a zero-coupon  municipal bond. The yield to maturity at purchase
is indicated.  Zero-coupon  securities  are purchased at a substantial  discount
from their value at maturity.

(3) Security was purchased under rule 144A of the Securities Act of 1933 or is a
private  placement,  and  unless  registered  under  the  Act or  exempted  from
registration,  may  only be  sold  to  qualified  institutional  investors.  The
aggregate value of these  securities at August 31, 1998, was  $6,442,027,  which
represented 2.1% of net assets.  Securities which were illiquid represented less
than 1% of net assets.

(4)  Escrowed  to  maturity  in U.S.  Government  securities  or state and local
government securities.

(5) When-issued security.

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

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

                                              See Notes to Financial Statements


14       1-800-345-2021


<TABLE>
<CAPTION>
California Insured Tax-Free--Performance
- --------------------------------------------------------------------------------

TOTAL RETURNS AS OF AUGUST 31, 1998

                                                    INCEPTION 12/30/86
                       CALIFORNIA INSURED   LEHMAN LONG-TERM   CALIF. INSURED MUNICIPAL DEBT FUNDS(2)
                            TAX-FREE         MUNI BOND INDEX    AVERAGE RETURN     FUND'S RANKING
- --------------------------------------------------------------------------------------------------
<S>                      <C>                   <C>                <C>               <C>                    
6 MONTHS(1) ...............   3.75%              4.07%             3.07%                --
1 YEAR ....................   8.96%             10.51%             8.11%            3 OUT OF 26
- ------------------------------------------------------------------------------------------------
AVERAGE ANNUAL RETURNS
3 YEARS ...................   8.26%              9.52%             7.59%            1 OUT OF 25
5 YEARS ...................   6.16%              7.08%             5.64%            3 OUT OF 14
10 YEARS ..................   8.36%              9.44%             8.32%            3 OUT OF 7
</TABLE>

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

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

See pages 30-31 for more information about returns,  the comparative  index, and
Lipper fund rankings.

[mountain chart - data below]

GROWTH OF $10,000 OVER 10 YEARS

Value on 8/31/98:
Lehman Long-Term Municipal Bond Index    $24,850
California Insured Tax-Free              $22,324

                California Insured     Lehman Long-Term
                     Tax-Free        Municipal Bond Index

DATE                ACCT VALUE           ACCT VALUE
8/31/88              $10,000              $10,000
9/30/88              $10,204              $10,227
12/31/88             $10,437              $10,529
3/31/89              $10,577              $10,634
6/30/89              $11,253              $11,370
9/30/89              $11,126              $11,310
12/31/89             $11,512              $11,788
3/31/90              $11,496              $11,813
6/30/90              $11,762              $12,116
9/30/90              $11,603              $12,018
12/31/90             $12,291              $12,638
3/31/91              $12,443              $12,928
6/30/91              $12,689              $13,257
9/30/91              $13,238              $13,855
12/31/91             $13,677              $14,350
3/31/92              $13,641              $14,400
6/30/92              $14,258              $15,034
9/30/92              $14,592              $15,444
12/31/92             $14,935              $15,816
3/31/93              $15,591              $16,508
6/30/93              $16,135              $17,189
9/30/93              $16,779              $17,877
12/31/93             $16,943              $18,150
3/31/94              $15,811              $16,697
6/30/94              $15,928              $16,818
9/30/94              $16,029              $16,886
12/31/94             $15,833              $16,501
3/31/95              $16,941              $18,143
6/30/95              $17,273              $18,558
9/30/95              $17,757              $19,063
12/31/95             $18,846              $20,340
3/31/96              $18,320              $19,809
6/30/96              $18,452              $20,043
9/30/96              $19,024              $20,664
12/31/96             $19,543              $21,239
3/31/97              $19,336              $21,054
6/30/97              $20,061              $21,993
9/30/97              $20,791              $22,811
12/31/97             $21,367              $23,637
3/31/98              $21,523              $23,911
6/30/98              $21,850              $24,358
8/31/98              $22,324              $24,850

$10,000 investment made 8/31/88

The chart at left shows the growth of a $10,000  investment over 10 years, while
the chart below shows the fund's year-by-year performance.  The Lehman Long-Term
Municipal  Bond Index is  provided  for  comparison  in each  chart.  California
Tax-Free Insured's returns include operating expenses (such as transaction costs
and management fees) that reduce returns, while the returns of the index do not.
Past  performance  does not  guarantee  future  results.  Investment  return and
principal  value will fluctuate,  and redemption  value may be more or less than
original cost.

[bar chart - data below]

ONE-YEAR RETURNS OVER 10 YEARS (PERIODS ENDED AUGUST 31)

                         California            Lehman Long-Term
                       Insured Tax-Free       Municipal Bond Index
08/31/88-08/31/89           12.04%                 13.44%
08/31/89-08/31/90            3.96%                  6.11%
08/31/90-08/31/91           11.87%                 13.47%
08/31/91-08/31/92           11.67%                 12.60%
08/31/92-08/31/93           13.74%                 14.76%
08/31/93-08/31/94           -1.68%                 -2.05%
08/31/94-08/31/95            8.09%                  9.43%
08/31/95-08/31/96            6.60%                  6.88%
08/31/96-08/31/97            9.25%                 11.26%
08/31/97-08/31/98            8.96%                 10.51%


                                               www.americancentury.com        15


California Insured Tax-Free--Q&A
- --------------------------------------------------------------------------------

     An  interview  with Dave  MacEwen,  a portfolio  manager on the  California
Insured Tax-Free fund investment team.

HOW DID THE FUND PERFORM DURING THE FISCAL YEAR ENDED AUGUST 31, 1998?

     California  Insured  Tax-Free  continued to perform well,  posting an 8.96%
return,  compared with the 8.11% average  return of the 26  "California  Insured
Municipal Debt Funds" tracked by Lipper Analytical Services. The fund's one-year
return placed it in the top 12% of its peer group.  (See the Total Returns table
on the previous page for other fund performance comparisons).

     California  Insured  Tax-Free also  produced  more current  income than its
peers. The fund's 30-day SEC yield as of August 31 was 4.17%,  compared with the
3.70% yield of the average  California insured municipal fund. The strong yields
and  returns can be  attributed  in part to the fund's  below-average  expenses.
Other things being equal,  lower expenses mean higher yields and returns for our
shareholders.

WHAT OTHER FACTORS CONTRIBUTED TO CALIFORNIA INSURED TAX-FREE'S STRONG RETURNS?

     A big  contributor  was our increasing  focus on discount bonds. As a quick
review,  discount  bonds trade below face value because their interest rates are
lower than the prevailing  market  interest rate;  premium bonds trade at prices
above face value because their interest rates are higher than prevailing  market
rates.

     When bond yields declined during the period,  we responded by swapping into
lower-coupon  discount bonds and out of higher-coupon  premium bonds. We started
by selling  bonds with  interest  rates of 5.50% and  replacing  them with 5.25%
bonds. As rates declined further, we replaced many of our 5.25% bonds with 5.00%
bonds and, ultimately, with 4.75% bonds.

     The fund's  increased  stake in  discounts  served it well in 1997,  but it
muted our  performance  somewhat in the spring of this year when interest  rates
were fairly stable.  Nonetheless,  we continued this strategy  because  discount
bonds offered more  potential  upside than premium bonds if interest  rates fell
and no more downside if rates rose. Our patience was rewarded when rates resumed
their decline in May, and discount  bonds outpaced  premiums  through the end of
the period.

WHY DO DISCOUNT BONDS PERFORM WELL IN DECLINING INTEREST RATE ENVIRONMENTS?

     Discount bonds are less likely than premium bonds to be called  (refinanced
by the issuer  before  maturity),  so  investing  in discount  bonds helps guard
against these inopportune calls.

     Like homeowners, municipal issuers often refinance--or "call"--their older,
higher-rate  debt when  interest  rates fall.  If a bond is called,  bondholders
often have to forfeit  high-yielding  bonds and  reinvest  the proceeds at lower
interest  rates.  If it  appears  that a bond is in  jeopardy  of being  called,
investors usually push its price lower.

[left margin]

"THE FUND'S ONE-YEAR RETURN PLACED IT IN THE TOP 12% OF ITS PEER GROUP."

YIELDS AS OF AUGUST 31, 1998

30-DAY SEC YIELD                    4.17%

30-DAY TAX-EQUIVALENT YIELDS
  34.70% TAX BRACKET                6.39%
  37.42% TAX BRACKET                6.66%
  41.95% TAX BRACKET                7.18%
  45.22% TAX BRACKET                7.61%

PORTFOLIO AT A GLANCE
                                   8/31/98            8/31/97
NUMBER OF SECURITIES                 71                63
WEIGHTED AVERAGE
MATURITY                          17.9 YRS          18.5 YRS
AVERAGE DURATION                   8.5 YRS           8.1 YRS
EXPENSE RATIO                       0.51%             0.48%

Investment terms are defined in the Glossary on page 31.


16       1-800-345-2021


California Insured Tax-Free--Q&A
- --------------------------------------------------------------------------------
                                                                    (Continued)

     Premium bonds are especially susceptible to calls because their issuers can
save money by refinancing  at lower rates.  Issuers of discount bonds don't have
much  incentive  to  refinance  bonds  that  carry  interest  rates  lower  than
prevailing  interest rates.  As a result,  discount bonds tend to perform better
than premium bonds when interest rates fall.

     Another way we tried to  insulate  the fund from  inopportune  calls was to
increase the fund's holdings of non-callable  bonds,  which can't be called away
by their issuers before  maturity.  In periods of declining  interest rates, the
fund's non-callable holdings performed quite well.

HOW DID YOU MANAGE CALIFORNIA INSURED TAX-FREE'S INTEREST RATE SENSITIVITY?

     We  increased  the fund's  sensitivity  to changes in  interest  rates,  as
measured by duration.  (The longer a fund's  duration,  the more the share price
tends to rise or fall when rates change.) In general,  lower-yielding bonds tend
to have longer  durations,  so our emphasis on discount  bonds caused the fund's
duration to extend slightly.

     By the end of the period,  California Insured Tax-Free's  duration stood at
8.5 years,  compared to 8.2 years six months ago and 8.1 years at the  beginning
of the period.

     It's  important to note that we make only modest  adjustments to the fund's
duration,  generally keeping it within a year of California  Insured  Tax-Free's
benchmark (a group of funds with similar investment objectives).

WHAT'S  THE  ATTRACTION  OF  REVENUE  BONDS,  WHICH  MADE UP  ABOUT  HALF OF THE
PORTFOLIO?

     Sales-tax revenue bonds,  which made up the majority of the fund's holdings
in the revenue sector,  have done well as California's  economy rolls along. But
the main reason we bought  these bonds was because  they had certain  structural
features we liked, such as discount coupons and protection from early calls.

WHAT'S YOUR OUTLOOK FOR THE MUNICIPAL MARKET?

     As 1998 has  progressed,  the Asian economic crisis has taken a bigger bite
out of U.S.  economic growth. It has also calmed  inflationary  fears--inflation
presently  appears to be almost  non-existent,  rising at an annualized  rate of
just  1.6% for the  first  eight  months  of this  year.  Given  the lack of any
building inflationary  pressures, we believe that interest rates can move lower.
In addition,  continued  bad news out of Asia,  Russia,  and Latin  America will
likely prompt the Federal Reserve to lower short-term interest rates.

     As for the municipal  market,  we think that supply and demand will be more
balanced for the remainder of the year. Much of the supply we've seen so far was
the result of a  record-setting  $3.5 billion  municipal  bond issue by the Long
Island Power  Authority in May, as well as issuers  flooding the market with new
debt in advance of that deal.  Going forward,  we believe that municipal  supply
will taper off to a more  normalized  level for the  remainder  of the year.  If
demand  remains firm or rises,  the municipal  market would likely  benefit from
lower supply.

[right margin]

"SALES-TAX REVENUE BONDS, WHICH MAKE UP THE MAJORITY OF THE FUND'S HOLDINGS IN
THE REVENUE SECTOR, HAVE DONE WELL AS CALIFORNIA'S ECONOMY ROLLS ALONG."

[pie charts - data below]

PORTFOLIO COMPOSITION BY SECURITY TYPE

AS OF AUGUST 31, 1998
Revenue                    52%
COPs/Leases                24%
Land-Secured               14%
Prerefunded/ETM             6%
GO                          4%

AS OF FEBRUARY 28, 1998
Revenue                    53%
COPs/Leases                23%
Land-Secured               16%
Prerefunded/ETM             4%
GO                          4%

Security types are defined on page 31.


                                                www.americancentury.com      17


California Insured Tax-Free--Q&A
- --------------------------------------------------------------------------------
                                                                     (Continued)

GIVEN YOUR OUTLOOK, WHAT ARE YOUR PLANS FOR CALIFORNIA INSURED TAX-FREE OVER THE
NEXT SIX MONTHS?

     As long as we believe that  interest  rates have the  potential to decline,
we'll keep the fund's  duration  slightly  longer than its  neutral  position of
around eight years.  In addition,  we'll  maintain our stake in discount  bonds,
which we believe will outperform premium bonds in a declining rate environment.

[left margin]

"GIVEN THE LACK OF ANY BUILDING INFLATIONARY PRESSURES, WE BELIEVE THAT
INTEREST RATES CAN MOVE LOWER."

PORTFOLIO COMPOSITION BY CREDIT RATING
                  % OF FUND INVESTMENTS
                 AS OF             AS OF
                8/31/98           2/28/98
AAA              100%              100%

Ratings provided by Standard & Poor's.  See Credit Rating  Guidelines on page 30
for more information.


18       1-800-345-2021


Insured Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------

AUGUST 31, 1998

Principal Amount                                                     Value
- --------------------------------------------------------------------------------
MUNICIPAL SECURITIES
            $  1,000,000   Banning COP, (Wastewater
                              System Refunding &
                              Improvement), 8.00%, 1/1/19
                              (AMBAC)                                $1,322,900
                 900,000   Brea Redevelopment Agency Tax
                              Allocation, (Project AB),
                              6.125%, 8/1/13 (MBIA)                     990,243
               2,500,000   California Health Facilities
                              Financing Auth. Rev., Series
                              1989 A, (Sutter Hospital),
                              6.70%, 1/1/13 (AMBAC)                   2,548,500
               1,250,000   California Health Facilities
                              Financing Auth. Rev., Series
                              1991 A, (Adventist Health),
                              7.00%, 3/1/13 (MBIA)                    1,358,675
               1,505,000   California Public Capital
                              Improvements Financing Auth.
                              Rev., (Pooled Project 1988 B),
                              8.10%, 3/1/18 (BIGI)                    1,540,548
               4,000,000   California State Public Works
                              Board Lease Rev. COP, Series
                              1993 A, (Department of
                              Corrections State Prisons),
                              5.00%, 12/1/19 (AMBAC)                  4,092,120
               6,000,000   California State Public Works
                              Board Lease Rev. COP, Series
                              1993 D, (Department of
                              Corrections State Prisons),
                              5.25%, 6/1/15 (FSA)                     6,387,120
               4,135,000   California State Universities and
                              Colleges Rev., 5.75%,
                              11/1/15 (FGIC)                          4,488,543
               3,925,000   California Statewide Communities
                              Development Auth. Rev. COP,
                              (Gemological Institute), 6.75%,
                              5/1/10 (Connie Lee)                     4,750,545
               5,000,000   California Statewide Community
                              Development Auth. Rev., Series
                              1998 A, (Sherman Oaks),
                              5.00%, 8/1/22 (AMBAC,
                              California Mortgage Insurance)          5,045,100
               1,520,000   Castaic Lake Water Agency COP,
                              Series 1994 A, (Water System
                              Improvement), 7.00%, 8/1/12
                              (MBIA)                                  1,883,812
               1,000,000   Contra Costa County COP, 7.80%,
                              6/1/07 (BIGI)                           1,050,730
               1,200,000   Contra Costa Water District Rev.,
                              Series 1992 E, 6.25%,
                              10/1/12 (AMBAC)                         1,411,056
               7,080,000   Corona Community Facilities
                              District Special Tax, No. 90-1-A,
                              4.625%, 9/1/17 (MBIA)                   6,836,802
               2,000,000   East Bay Municipal Utility District
                              Wastewater System Rev.,
                              4.75%, 6/1/28 (MBIA)                    1,930,360

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

            $  1,000,000   East Valley Water District COP,
                              (Treatment Plant), 6.60%,
                              12/1/14 (AMBAC)                        $1,109,410
               2,000,000   Escondido Joint Powers Financing
                              Auth. Rev. COP, 6.125%,
                              9/1/11 (AMBAC)                          2,158,980
               2,000,000   Fontana Unified School District
                              GO, Series 1997 D, 5.85%,
                              5/1/22 (FGIC)(1)                        1,977,640
               2,100,000   Foothill-De Anza Community
                              College District COP, 6.25%,
                              9/1/13 (Connie Lee)                     2,324,952
               1,240,000   Fresno Sewer Rev., Series
                              1993 A-1, 4.75%, 9/1/21
                              (AMBAC)                                 1,223,260
               1,725,000   Fresno Sewer Rev., Series
                              1993 A-1, 6.25%, 9/1/14
                              (AMBAC)                                 2,039,468
               5,000,000   Glendale Hospital Rev., Series
                              1991 A, (Adventist Hospital),
                              6.75%, 3/1/13 (MBIA)                    5,399,050
               4,830,000   Glendale Unified School District 
                              COP, Series 1994 A, 6.50%,
                              3/1/12 (AMBAC)                          5,403,080
               1,340,000   Kern High School District GO,
                              Series 1993 C, 6.25%, 8/1/13
                              (MBIA)(2)                               1,583,880
               3,630,000   Kern High School District GO,
                              Series 1993 D, 7.00%, 8/1/17
                              (MBIA)(2)                               4,205,900
               2,000,000   La Quinta Financing Auth. Lease
                              Rev. COP, (La Quinta City Hall),
                              5.55%, 10/1/18 (MBIA)                   2,187,780
                 790,000   Lake Elsinore Public Financing
                              Auth. Tax Allocation, Series
                              1992 C, (Redevelopment),
                              6.625%, 2/1/17 (FGIC)                     834,888
               1,500,000   Lakewood Redevelopment
                              Agency Tax Allocation, Series
                              1992 A, (Project No. 1), 6.50%,
                              9/1/17 (FSA)                            1,660,305
                 805,000   Los Angeles Community
                              Redevelopment Agency Housing
                              Rev., Series 1994 C, 7.00%,
                              1/1/14 (AMBAC)                            882,988
               3,500,000   Los Angeles Community
                              Redevelopment Agency Tax
                              Allocation, Series 1993 H,
                              (Bunker Hill), 6.50%, 12/1/14
                              (FSA)                                   3,952,095
               4,000,000   Los Angeles Community
                              Redevelopment Agency Tax
                              Allocation, Series 1993 H,
                              (Bunker Hill), 6.50%, 12/1/15
                              (FSA)                                   4,516,680
               2,000,000   Los Angeles County Metropolitan
                              Transportation Auth. Sales Tax
                              Rev., Series 1993 B, 4.75%,
                              7/1/18 (AMBAC)                          1,953,400

See Notes to Financial Statements


                                                www.americancentury.com       19


Insured Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

            $  1,000,000   Los Angeles County
                              Transportation Commission
                              Sales Tax Rev., 6.50%, 7/1/13
                              (AMBAC)                                $1,086,260
               1,100,000   Los Angeles Wastewater System
                              Rev., Series 1991 C, 7.00%,
                              6/1/11 (AMBAC)                          1,148,708
               1,785,000   Los Angeles Wastewater System
                              Rev., Series 1993 D, 4.70%,
                              11/1/19 (FGIC)                          1,718,830
               4,015,000   Metropolitan Water District of
                              Southern California Waterworks
                              Rev., Series 1996 B, 4.75%,
                              7/1/21 (MBIA)                           3,889,612
               1,915,000   Midpeninsula Regional Open
                              Space District Financing Auth.
                              Rev., 5.90%, 9/1/14 (AMBAC)             2,104,202
               5,000,000   Modesto, Stockton, Redding
                              Public Power Agency Rev.,
                              Series 1989 D, (San Juan),
                              6.75%, 7/1/20 (MBIA)(2)                 6,063,450
               1,200,000   National City Joint Powers Auth.
                              Lease Rev. COP, (Police
                              Facilities), 6.75%, 10/1/17
                              (AMBAC)                                 1,314,372
               2,810,000   Oakland Redevelopment Agency
                              Tax Allocation, (Central District
                              Redevelopment Tax), 5.50%,
                              2/1/14 (AMBAC)                          3,072,285
               2,700,000   Orange County Financing Auth.
                              Tax Allocation, Series 1992 A,
                              6.25%, 9/1/14 (MBIA)                    2,922,480
               1,950,000   Ramona Municipal Water District
                              COP, 7.20%, 10/1/10
                              (AMBAC)                                 2,108,555
               1,100,000   Redlands Unified School District
                              COP, 6.00%, 9/1/12 (FSA)                1,163,481
               5,000,000   Sacramento Municipal Utility
                              District Electric Rev., Series
                              1993 G, 4.75%, 9/1/21
                              (MBIA)                                  4,817,050
              17,500,000   Sacramento Municipal Utility
                              District Electric Rev., Series
                              1997 K, 5.25%, 7/1/24
                              (AMBAC)                                18,510,274
               1,305,000   Sacramento Redevelopment
                              Agency Tax Allocation, (Merged
                              Downtown Redevelopment),
                              6.50%, 11/1/00, Prerefunded
                              at 102% of Par (MBIA)(2)                1,409,713
               1,200,000   Sacramento Redevelopment
                              Agency Tax Allocation, (Merged
                              Downtown Redevelopment),
                              6.50%, 11/1/13 (MBIA)                   1,296,288
               3,000,000   Saddleback Community College
                              District COP, 7.00%, 8/1/19
                              (BIGI)                                  3,142,050

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

            $  1,345,000   San Diego Community College
                              District Lease Rev. COP,
                              6.125%, 12/1/06, Prerefunded
                              at 102% of Par (MBIA)(2)               $1,565,015
               7,000,000   San Diego County COP, 5.625%,
                              9/1/12 (AMBAC)                          7,742,000
               3,000,000   San Francisco Bay Area Rapid
                              Transit District Sales Tax Rev.,
                              4.75%, 7/1/23 (AMBAC)                   2,904,180
               3,250,000   San Francisco Bay Area Rapid
                              Transit District Sales Tax Rev.,
                              6.75%, 7/1/00, Prerefunded at
                              102% of Par (AMBAC)(2)(3)               3,497,065
              10,000,000   San Francisco City and County
                              International Airport Rev.,
                              (Second Series Issue 2), 6.75%,
                              5/1/20 (MBIA)                          11,286,800
               3,500,000   San Mateo County Joint Powers
                              Auth. Lease Rev., (Capital),
                              5.00%, 7/1/21 (MBIA)                    3,574,200
               3,535,000   San Mateo County Joint Powers
                              Auth. Lease Rev. COP, (Capital
                              Projects Program), 6.50%,
                              7/1/15 (MBIA)                           4,273,815
               1,000,000   San Mateo County Transportation
                              District Sales Tax Rev., Series
                              1993 A, 5.25%, 6/1/18 (MBIA)            1,054,960
               1,000,000   San Ysidro School District GO,
                              6.125%, 8/1/21 (AMBAC)                  1,152,720
               3,500,000   Santa Ana Financing Auth. Rev.,
                              Series 1999 B, (South Harbor
                              Boulevard), 5.125%, 9/1/19
                              (MBIA)(4)                               3,479,945
               2,000,000   Santa Margarita-Dana Point Auth.
                              Rev., Series 1994 B,
                              (Improvement Districts 3, 3A,
                              4, 4A), 7.25%, 8/1/14 (MBIA)            2,581,460
               1,265,000   Sierra Valley Hospital District GO,
                              5.50%, 8/1/23 (MBIA)                    1,332,260
               2,500,000   South Coast Air Quality
                              Management District Building
                              GO, (Headquarters), 6.00%,
                              8/1/11 (AMBAC)                          2,877,475
               2,040,000   Stockton East Water District COP,
                              Series 1997 A, 4.75%, 4/1/22
                              (AMBAC)                                 1,964,275
                  30,000   Thousand Oaks Redevelopment
                              Agency Rev., (Single Family
                              Residential Mortgage Rev.),
                              7.90%, 1/1/16 (AMBAC)                      30,182
               2,500,000   Ukiah Electric Rev., 6.25%,
                              6/1/18 (MBIA)                           2,951,925
               1,445,000   Walnut Valley Unified School
                              District GO, Series 1992 B,
                              6.00%, 8/1/10 (AMBAC)(2)                1,667,010

                                              See Notes to Financial Statements


20      1-800-345-2021


Insured Tax-Free--Schedule of Investments
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998

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

            $  4,525,000   Woodland COP, (Wastewater
                              System Refunding), 5.75%,
                              3/1/12 (AMBAC)                         $5,051,258
                                                                ----------------
TOTAL MUNICIPAL SECURITIES--93.8%                                   203,804,965
                                                                ----------------
   (Cost $188,000,954)

MUNICIPAL DERIVATIVES(5)
               2,000,000   East Bay Municipal Utility District
                              Wastewater Treatment System
                              Rev., Yield Curve Notes, Inverse
                              Floater, 6.72%, 6/1/13
                              (AMBAC)                                 2,220,000
               1,000,000   San Diego County Water Auth.
                              COP, (Reg Rites), Yield Curve
                              Notes, Inverse Floater, 7.64%,
                              4/22/09 (FGIC)                          1,222,500
               2,750,000   Southern California Public Power
                              Auth. Rev., Yield Curve Notes,
                              Inverse Floater, 6.62%, 7/1/17
                              (FGIC)                                  2,952,813
                                                                ----------------
TOTAL MUNICIPAL DERIVATIVES--3.0%                                     6,395,313
                                                                ----------------
   (Cost $5,843,373)

Principal Amount                                                     Value
- --------------------------------------------------------------------------------
SHORT-TERM MUNICIPAL SECURITIES
            $  2,000,000   California Pollution Control
                              Financing Auth. Rev., Series
                              1986 C, (Southern California
                              Edison), VRDN, 3.80%, 9/1/98           $2,000,000
               3,000,000   Irvine Improvement Bond Act
                              1915 Special Assessment, 
                              Series 1996 A, (Assessment District 
                              95-12), VRDN, 3.15%, 9/1/98
                              (LOC: KBC Bank and
                              Insurance Holding)                      3,000,000
               2,000,000   Irvine Ranch California Water
                              District Rev., (Consolidated
                              Bonds), VRDN, 3.15%, 9/1/98
                              (LOC: Landesbank
                              Hessen-Thuringen Girozentrale)          2,000,000
                                                                ----------------
TOTAL SHORT-TERM
MUNICIPAL SECURITIES--3.2%                                            7,000,000
                                                                ----------------
   (Cost $7,000,000)

TOTAL INVESTMENT SECURITIES--100.0%                               $ 217,200,278
                                                                ================
   (Cost $200,844,327)

NOTES TO SCHEDULE OF INVESTMENTS

AMBAC = AMBAC Assurance Corporation

BIGI = Bond Investor's Guaranty Inc.

COP = Certificates of Participation

FGIC = Financial Guaranty Insurance Co.

FSA = Financial Security Assurance Inc.

GO = General Obligation

LOC = Letter of Credit

MBIA = MBIA Insurance Corp.

VRDN = Variable Rate Demand Note.  Interest  reset date is indicated and used in
calculating the weighted  average  portfolio  maturity.  Rate shown is effective
August 31, 1998.

(1)  Step-coupon  security.  Yield to maturity at purchase is  indicated.  These
securities  become interest bearing at a predetermined  rate and future date and
are purchased at a substantial discount from their value at maturity.

(2)  Escrowed  to  maturity  in U.S.  Government  securities  or state and local
government securities.

(3) Security,  or a portion  thereof,  has been segregated at the custodian bank
for a when-issued security.

(4) When-issued security.

(5) Inverse  floaters have interest rates that move inversely to market interest
rates.  Inverse  floaters  typically have durations longer than long-term bonds,
which may cause  their  value to be more  volatile  than  long-term  bonds  when
interest rates change.

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

The schedule includes:

* a list of each investment

* the principal amount of each investment

* the market value of each investment

See Notes to Financial Statements


                                                www.americancentury.com       21


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

AUGUST 31, 1998                                     HIGH-YIELD          INSURED
                                                    MUNICIPAL          TAX-FREE
ASSETS
Investment securities, at value
  (identified cost of $288,259,202 and
  $200,844,327, respectively) (Note 3) .......     $303,455,303     $217,200,278
Investment in affiliated money
market fund (Note 2) .........................            8,523            8,695
Cash .........................................          918,893          119,703
Receivable for investments sold ..............             --          2,887,560
Interest receivable ..........................        5,054,723        3,296,567
                                                   ------------     ------------
                                                    309,437,442      223,512,803
                                                   ------------     ------------

LIABILITIES
Disbursements in excess of
demand deposit cash ..........................          186,602        1,482,433
Payable for investments purchased ............        4,899,944        6,237,045
Payable for capital shares redeemed ..........          249,208          109,338
Accrued management fees (Note 2) .............          135,145           90,997
Dividends payable ............................          124,308           83,156
Payable for trustees' fees
and expenses .................................              695              617
                                                   ------------     ------------
                                                      5,595,902        8,003,586
                                                   ------------     ------------
Net Assets ...................................     $303,841,540     $215,509,217
                                                   ============     ============

CAPITAL SHARES
Outstanding (unlimited number
of shares authorized) ........................       30,594,204       20,325,822
                                                   ============     ============
Net Asset Value Per Share ....................     $       9.93     $      10.60
                                                   ============     ============

NET ASSETS CONSIST OF:
Capital paid in ..............................     $286,644,057     $198,471,580
Undistributed net investment income ..........           18,811             --
Accumulated undistributed net
realized gain on investment
transactions .................................        1,982,571          681,686
Net unrealized appreciation
on investments (Note 3) ......................       15,196,101       16,355,951
                                                   ------------     ------------
                                                   $303,841,540     $215,509,217
                                                   ============     ============

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

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

                                              See Notes to Financial Statements


22       1-800-345-2021


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

YEAR ENDED AUGUST 31, 1998                         HIGH-YIELD          INSURED
                                                   MUNICIPAL           TAX-FREE
INVESTMENT INCOME
Income:
Interest ...................................       $13,998,056       $10,968,312
                                                   -----------       -----------

Expenses (Note 2):
Management fees ............................         1,311,664         1,031,569
Trustees' fees and expenses ................             9,263             8,687
                                                   -----------       -----------
                                                     1,320,927         1,040,256
                                                   -----------       -----------
Net investment income ......................        12,677,129         9,928,056
                                                   -----------       -----------

REALIZED AND UNREALIZED
GAIN ON INVESTMENTS (NOTE 3)
Net realized gain on investments ...........         2,562,512         1,583,804
Change in net unrealized
appreciation on investments ................         6,311,903         5,870,522
                                                   -----------       -----------
Net realized and unrealized
gain on investments ........................         8,874,415         7,454,326
                                                   -----------       -----------
Net Increase in Net Assets
Resulting from Operations ..................       $21,551,544       $17,382,382
                                                   ===========       ===========

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

Fund OPERATIONS include:

* income earned from investments

* management fees and other expenses

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

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

See Notes to Financial Statements


                                                www.americancentury.com       23


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

YEARS ENDED AUGUST 31, 1998  AND AUGUST 31, 1997

                                            HIGH-YIELD MUNICIPAL               INSURED TAX-FREE
Increase (Decrease) in Net Assets           1998            1997              1998            1997

OPERATIONS
<S>                                   <C>              <C>              <C>              <C>          
Net investment income .............   $  12,677,129    $   9,693,133    $   9,928,056    $   9,922,832
Net realized gain on investments ..       2,562,512        2,344,182        1,583,804        2,673,486
Change in net unrealized
  appreciation on investments .....       6,311,903        5,003,597        5,870,522        4,232,221
                                      -------------    -------------    -------------    -------------
Net increase in net assets
  resulting from operations .......      21,551,544       17,040,912       17,382,382       16,828,539
                                      -------------    -------------    -------------    -------------

DISTRIBUTIONS TO  SHAREHOLDERS
From net investment income ........     (12,677,129)      (9,698,539)      (9,928,056)      (9,927,378)
From net realized gains on
  investment transactions .........      (2,545,652)            --         (2,921,262)            --
                                      -------------    -------------    -------------    -------------
Decrease in net assets
from distributions ................     (15,222,781)      (9,698,539)     (12,849,318)      (9,927,378)
                                      -------------    -------------    -------------    -------------

CAPITAL SHARE  TRANSACTIONS
Proceeds from shares sold .........     181,804,274      139,322,252       82,053,478       56,168,346
Proceeds from reinvestment
of distributions ..................      11,152,218        6,931,665        8,954,545        7,003,430
Payments for shares redeemed ......     (88,275,006)    (105,440,242)     (69,176,578)     (72,739,195)
                                      -------------    -------------    -------------    -------------
Net increase (decrease) in net
  assets from capital share
  transactions ....................     104,681,486       40,813,675       21,831,445       (9,567,419)
                                      -------------    -------------    -------------    -------------
Net increase (decrease)
in net assets .....................     111,010,249       48,156,048       26,364,509       (2,666,258)

NET ASSETS
Beginning of year .................     192,831,291      144,675,243      189,144,708      191,810,966
                                      -------------    -------------    -------------    -------------
End of year .......................   $ 303,841,540    $ 192,831,291    $ 215,509,217    $ 189,144,708
                                      =============    =============    =============    =============
Undistributed net investment
income ............................   $      18,811             --               --               --
                                      =============    =============    =============    =============

TRANSACTIONS IN SHARES
OF THE FUNDS
Sold ..............................      18,553,052       14,692,971        7,856,824        5,525,997
Issued in reinvestment of
distributions .....................       1,137,993          729,711          855,798          666,648
Redeemed ..........................      (9,015,907)     (11,108,238)      (6,627,802)      (7,128,973)
                                      -------------    -------------    -------------    -------------
Net increase (decrease) ...........      10,675,138        4,314,444        2,084,820         (936,328)
                                      =============    =============    =============    =============
</TABLE>

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

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

* distributions--income and gains distributed to shareholders

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

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

                                              See Notes to Financial Statements

24         1-800-345-2021



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

AUGUST 31, 1998

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 High-Yield
Municipal Fund  (High-Yield)  and American Century - Benham  California  Insured
Tax-Free  Fund  (Insured)  (the Funds) are two of the seven funds  issued by the
Trust. The Funds are diversified under the 1940 Act. The Funds seek income which
is exempt from federal and California income taxes.  High-Yield seeks to provide
as high a level of current income 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 as is consistent  with safety
of principal through investment in insured California municipal securities.  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 are in accordance with generally accepted accounting principles.

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

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

     Investment  Income--Interest  income is recorded  on the accrual  basis and
includes accretion of discounts and amortization of premiums.

     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 income taxes

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

     The  character of  distributions  made during the year from net  investment
income  or  net  realized   capital   gains  may  differ  from  their   ultimate
characterization for federal income tax purposes.  These differences reflect the
differing character of certain income items and net capital gains and losses for
financial  statement and tax purposes and may result in  reclassification  among
certain capital accounts.

     Futures  Contracts--The  Funds  may  buy and  sell  interest  rate  futures
contracts  relating  to debt  securities.  Futures  transactions  may be used 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 contracts may include the possibility that
the changes in value of the contract may not correlate with the changes in value
of the underlying  securities.  Upon entering into a futures contract, the Funds
are  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 Funds.  The
variation  margin is equal to the  daily  change  in the  contract  value and is
recorded as an unrealized  gain or loss. The Funds  recognize a realized gain or
loss when the contract is closed or expired.  Net realized and unrealized  gains
or losses  occurring  during  the  holding  period of  futures  contracts  are a
component of realized gain (loss) on  investments  and  unrealized  appreciation
(depreciation)  on  investments,   respectively.  There  were  no  open  futures
contracts at August 31, 1998.

     Use of  Estimates--The  preparation  of financial  statements in conformity
with  generally  accepted  accounting  principles  requires  management  to make
estimates and assumptions.  These estimates and assumptions  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.

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


                                                www.americancentury.com       25


Notes to Financial Statements
- --------------------------------------------------------------------------------
                                                                    (Continued)
AUGUST 31, 1998
- --------------------------------------------------------------------------------
2. TRANSACTIONS WITH RELATED PARTIES

     The Trust has entered into a Management  Agreement  with  American  Century
Investment  Management,  Inc.  (ACIM) that  provides  each Fund with  investment
advisory and management  services in exchange for a single,  unified  management
fee.  Expenses  excluded from this  agreement are  brokerage,  taxes,  portfolio
insurance,  interest,  fees and expenses of the Trustees who are not  considered
"interested persons" as defined in the Investment Company Act of 1940 (including
counsel fees) and extraordinary  expenses.  The annual rate at which this fee is
assessed is determined monthly in a two-step process: First, a fee rate schedule
is  applied  to the net  assets  of all of the  funds in the  Fund's  investment
category which are managed by ACIM (the "Investment  Category Fee"). The overall
investment objective of each Fund determines its Investment Category.  The three
investment  categories  are:  the  Money  Market  Fund  Category,  the Bond Fund
Category and the Equity Fund  Category.  High-Yield  and Insured are included in
the Bond Fund Category.  Second,  a separate fee rate schedule is applied to the
net  assets  of all of the  funds  managed  by ACIM  (the  "Complex  Fee").  The
Investment  Category  Fee and the  Complex Fee are then added to  determine  the
unified  management  fee rate.  The  management fee is paid monthly by each Fund
based on each Fund's  aggregate  average  daily net assets  during the  previous
month multiplied by the monthly  management fee rate. The annualized  Investment
Category Fee schedule for each Fund is as follows:

     High-Yield:

     0.3100% of the first $1 billion 
     0.2580% of the next $1 billion 
     0.2280% of the next $3 billion 
     0.2080% of the next $5 billion 
     0.1950% of the next $15 billion 
     0.1930% of the next $25 billion
     0.1925% of the average daily net assets over $50 billion


     Insured:

     0.2800% of the first $1 billion 
     0.2280% of the next $1 billion 
     0.1980% of the next $3 billion 
     0.1780% of the next $5 billion 
     0.1650% of the next $15 billion 
     0.1630% of the next $25 billion
     0.1625% of the average daily net assets over $50 billion

     The annualized Complex Fee schedule (for all Funds) is as follows:

     0.3100% of the first $2.5 billion 
     0.3000% of the next $7.5 billion
     0.2985% of the next $15 billion 
     0.2970% of the next $25 billion 
     0.2960% of the next $50 billion 
     0.2950% of the next $100 billion 
     0.2940% of the next $100 billion 
     0.2930% of the next $200 billion 
     0.2920% of the next $250 billion 
     0.2910% of the next $500 billion
     0.2900% of the average daily net assets over $1,250 billion

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

     As of August 31, 1998, High-Yield had invested $8,523 in shares of American
Century - Benham California Municipal Money Market Fund (Municipal Money Market)
and Insured had invested $8,695 in shares of American  Century - Benham Tax-Free
Money Market Fund (Tax-Free Money Market).  The terms of such  transactions were
identical to those with non-related  entities except that, to avoid  duplicative
management  fees,  High-Yield and Insured did not pay ACIM  management fees with
respect to assets invested in Municipal Money Market and Tax-Free Money Market.

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

     Purchases of investment securities,  excluding short-term investments,  for
High-Yield and Insured totaled $186,517,043 and $79,693,641, respectively. Sales
of investment securities,  excluding short-term investments,  for High-Yield and
Insured totaled $83,389,798 and $62,635,322, respectively.

     As  of  August  31,  1998,  accumulated  net  unrealized  appreciation  for
High-Yield and Insured was  $15,196,101  and  $16,355,951,  respectively,  which
consisted  of  unrealized   appreciation   of   $15,269,117   and   $16,356,029,
respectively,  and unrealized depreciation of $73,016 and $78, respectively. The
aggregate  cost of  investments  for federal income tax purposes was the same as
the cost for financial reporting purposes.


26       1-800-345-2021


<TABLE>
<CAPTION>
High-Yield Municipal--Financial Highlights
- --------------------------------------------------------------------------------

                                            FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED AUGUST 31

                                              1998              1997              1996              1995            1994
PER-SHARE DATA
Net Asset Value,
<S>                                     <C>               <C>               <C>               <C>               <C>        
Beginning of Year .................     $      9.68       $      9.27       $      9.11       $      9.06       $      9.66
                                        -----------       -----------       -----------       -----------       -----------
Income From Investment
Operations
  Net Investment Income ...........            0.51              0.55              0.56              0.56              0.56
  Net Realized and Unrealized
  Gain (Loss) on
  Investment Transactions .........            0.37              0.41              0.16              0.05             (0.48)
                                        -----------       -----------       -----------       -----------       -----------
  Total From Investment
  Operations ......................            0.88              0.96              0.72              0.61              0.08
                                        -----------       -----------       -----------       -----------       -----------
Distributions
  From Net Investment Income ......           (0.51)            (0.55)            (0.56)            (0.56)            (0.56)
  From Net Realized
  Capital Gains ...................           (0.12)             --                --                --               (0.12)
                                        -----------       -----------       -----------       -----------       -----------
  Total Distributions .............           (0.63)            (0.55)            (0.56)            (0.56)            (0.68)
                                        -----------       -----------       -----------       -----------       -----------
Net Asset Value, End of Year ......     $      9.93       $      9.68       $      9.27       $      9.11       $      9.06
                                        ===========       ===========       ===========       ===========       ===========
  Total Return(1) .................            9.35%            10.61%             8.02%             7.09%             0.87%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .............            0.54%             0.50%             0.51%             0.51%             0.51%
Ratio of Net Investment
Income to Average Net Assets ......            5.23%             5.77%             5.99%             6.30%             6.02%
Portfolio Turnover Rate ...........              36%               46%               36%               40%               43%
Net Assets, End
of Year (in thousands) ............     $   303,842       $   192,831       $   144,675       $   116,166       $   116,000
</TABLE>

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

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL HIGHLIGHTS--These  statements itemize current period
activity and  statistics  and provide  comparison  data for the last five fiscal
years.

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

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

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

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

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

See Notes to Financial Statements


                                                www.americancentury.com       27


<TABLE>
<CAPTION>
Insured Tax-Free --Financial Highlights
- --------------------------------------------------------------------------------

                                                FOR A SHARE OUTSTANDING THROUGHOUT THE YEARS ENDED AUGUST 31

                                           1998              1997              1996              1995             1994

PER-SHARE DATA
Net Asset Value,
<S>                                   <C>               <C>               <C>               <C>               <C>        
Beginning of Year .................   $     10.37       $     10.00       $      9.89       $      9.67       $     10.64
                                      -----------       -----------       -----------       -----------       -----------
Income From Investment
Operations
  Net Investment Income ...........          0.51              0.53              0.53              0.53              0.53
  Net Realized and Unrealized
  Gain (Loss) on
  Investment Transactions .........          0.39              0.37              0.11              0.22             (0.69)
                                      -----------       -----------       -----------       -----------       -----------
  Total From Investment
  Operations ......................          0.90              0.90              0.64              0.75             (0.16)
                                      -----------       -----------       -----------       -----------       -----------
Distributions
  From Net Investment Income ......         (0.51)            (0.53)            (0.53)            (0.53)            (0.53)
  From Net Realized Capital Gains .         (0.16)             --                --                --               (0.21)
  In Excess of Net Realized Gains .          --                --                --                --               (0.07)
                                      -----------       -----------       -----------       -----------       -----------
  Total Distributions .............         (0.67)            (0.53)            (0.53)            (0.53)            (0.81)
                                      -----------       -----------       -----------       -----------       -----------
Net Asset Value, End of Year ......   $     10.60       $     10.37       $     10.00       $      9.89       $      9.67
                                      ===========       ===========       ===========       ===========       ===========
  Total Return(1) .................          8.96%             9.25%             6.60%             8.09%            (1.68)%

RATIOS/SUPPLEMENTAL DATA
Ratio of Operating Expenses
to Average Net Assets .............          0.51%             0.48%             0.49%             0.50%             0.49%
Ratio of Net Investment Income
to Average Net Assets .............          4.91%             5.23%             5.30%             5.54%             5.20%
Portfolio Turnover Rate ...........            31%               46%               43%               40%               47%
Net Assets, End
of Year (in thousands) ............   $   215,509       $   189,145       $   191,811       $   178,913       $   189,439
</TABLE>

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

- --------------------------------------------------------------------------------
UNDERSTANDING THE FINANCIAL HIGHLIGHTS--These  statements itemize current period
activity and  statistics  and provide  comparison  data for the last five fiscal
years.

On a per-share basis, it includes:

* share price at the beginning of the period

* investment income and capital gains or losses

* income and capital gains distributions paid to shareholders

* share price at the end of the period

It also includes some key statistics for the period:

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

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

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

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

                                              See Notes to Financial Statements


28       1-800-345-2021


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

To the Board of Trustees of the
American Century California Tax-Free and Municipal Funds and  Shareholders of
the American Century-Benham California High-Yield Municipal Fund and the
American Century-Benham California Insured Tax-Free Fund


In our opinion, the accompanying statements of assets and liabilities, including
the schedules of investments, and the related statements of operations,  changes
in net assets and the  financial  highlights  present  fairly,  in all  material
respects,  the  financial  position of the  American  Century-Benham  California
High-Yield  Municipal Fund and the American Century - Benham California  Insured
Tax-Free Fund (two of the funds  constituting  the American  Century  California
Tax-Free and Municipal  Funds,  hereafter  referred to as the "Funds") at August
31, 1998, the results of each of their operations,  the changes in each of their
net assets and the financial  highlights for the year then ended,  in conformity
with generally accepted accounting  principles.  The statement of changes in net
assets for the year ended August 31, 1997 and the financial  highlights for each
of the four years in the period ended August 31, 1997 for each fund were audited
by other auditors, whose report, dated October 3, 1997, expressed an unqualified
opinion on those statements. These financial statements and financial highlights
(hereafter referred to as "financial  statements") are the responsibility of the
Funds'  management;  our  responsibility  is to  express  an  opinion  on  these
financial  statements  based on our  audits.  We  conducted  our audits of these
financial  statements in accordance with generally  accepted auditing  standards
which require that we plan and perform the audit to obtain reasonable  assurance
about whether the financial  statements  are free of material  misstatement.  An
audit includes examining,  on a test basis,  evidence supporting the amounts and
disclosures in the financial  statements,  assessing the  accounting  principles
used and  significant  estimates made by management,  and evaluating the overall
financial  statement  presentation.  We believe that our audits,  which included
confirmation  of  securities  at  August  31,  1998 by  correspondence  with the
custodian and brokers and the  application  of alternative  auditing  procedures
where  confirmations from brokers were not received,  provide a reasonable basis
for the opinion expressed above.


                                                      PricewaterhouseCoopers LLP


Kansas City, Missouri
October 14, 1998


                                                www.americancentury.com       29


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

INVESTMENT PHILOSOPHY AND POLICIES

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

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

     California  High-Yield  Municipal seeks to provide a high level of interest
income exempt from both federal and  California  state income taxes by investing
in California municipal securities.  The fund typically invests a portion of its
assets in lower-quality and unrated  securities,  which are subject to increased
credit risk, default risk and liquidity risk. The fund is managed to maintain an
average maturity of 10 years or more.

     California  Insured  Tax-Free  seeks to  provide a high  level of  interest
income exempt from both federal and  California  state income taxes by investing
in insured California municipal  securities.  The fund is managed to maintain an
average maturity of 10 years or more. Fund shares are not insured.

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
2,800 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  High-Yield  Municipal and Insured
Tax-Free funds are:

     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.

CREDIT RATING GUIDELINES

     Credit  ratings  are  issued  by  independent  research  companies  such as
Standard  & Poor's  and  Moody's.  Ratings  are based on an  issuer's  financial
strength and ability to pay interest and principal in a timely manner.

     Securities  rated  AAA,  AA,  A, or BBB are  considered  "investment-grade"
securities, meaning they are relatively safe from default. California High-Yield
Municipal  may invest up to 50% of its  portfolio in  securities  that are below
investment grade or not rated.

     It's important to note that credit ratings are  subjective,  reflecting the
opinions of the rating agencies; they are not absolute standards of quality.


[left margin]

INVESTMENT TEAM LEADERS

PORTFOLIO MANAGERS
     DAVE MACEWEN
     STEVEN PERMUT

CREDIT RESEARCH MANAGER
     STEVEN PERMUT


30       1-800-345-2021


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

RETURNS

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

* Average Annual Returns  illustrate the annually  compounded returns that would
have produced the fund's cumulative total returns if the fund's  performance had
been  constant  over the  entire  period.  Average  annual  returns  smooth  out
variations  in a fund's  return;  they are not the same as  fiscal  year-by-year
results.  For  fiscal  year-by-year  returns,  please  refer  to the  "Financial
Highlights" on pages 27-28.

YIELDS

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

* 30-Day  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 30-day SEC yield.

INVESTMENT TERMS

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

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

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

STATISTICAL TERMINOLOGY

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

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

* Average  Duration--  another  measure  of the  sensitivity  of a  fixed-income
portfolio to interest rate changes.  Duration is a time-weighted  average of the
interest and principal payments of the securities in a portfolio.

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

TYPES OF MUNICIPAL SECURITIES

* 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.

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

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

*  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.

*  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).


                                                www.americancentury.com       31


Notes
- --------------------------------------------------------------------------------


32       1-800-345-2021


[inside back cover]

[right margin]

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

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

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

AUTOMATED INFORMATION LINE:
1-800-345-8765

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

FAX: 816-340-7962

INTERNET: www.americancentury.com


AMERICAN CENTURY CALIFORNIA TAX-FREE
AND MUNICIPAL FUNDS


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

THIS  REPORT AND THE  STATEMENTS  IT  CONTAINS  ARE  SUBMITTED  FOR THE  GENERAL
INFORMATION OF OUR  SHAREHOLDERS.  THE REPORT IS NOT AUTHORIZED FOR DISTRIBUTION
TO  PROSPECTIVE  INVESTORS  UNLESS  PRECEDED  OR  ACCOMPANIED  BY  AN  EFFECTIVE
PROSPECTUS.

(c) 1998 AMERICAN CENTURY SERVICES CORPORATION
FUNDS DISTRIBUTOR, INC.


[recycled logo]
Recycled


[back cover]

[40 Years]
Four Decades of Serving Investors
40 Years
American Century
1958-1998

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



9810                              (c)1998 American Century Services Corporation
SH-BKT-13909                                            Funds Distributor, Inc.


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