VANGUARD CALIFORNIA TAX FREE FUND
N-30D, 1994-08-09
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<PAGE>   1

CHAIRMAN'S LETTER



DEAR SHAREHOLDER:

The six months ended May 31, the first half of the 1994 fiscal year for the
eleven Portfolios of the Vanguard State Tax-Free Fund, witnessed something that
we have not seen much of since 1987: rising interest rates. As a result, the
prices of long-term municipal bonds declined during the period, while the
income from money market instruments received a nice boost.

       This environment, of course, negatively impacted the net asset values of
each of our Insured Long-Term Portfolios, as reflected in the table on page 2.
(The net asset values of our Money Market Portfolios, as you would expect,
remained constant, at $1.00 per share.) While fluctuating asset values are part
and parcel of bond investing, our Long-Term Portfolios exceeded the total
returns (capital change plus income) achieved by competitive state tax-free
bond funds. What is more, all of our Portfolios remain virtually peerless in
the mutual fund field with respect to their investment quality, as shown in the
third column of the table on page 2. In summary form, here are the Portfolio
highlights over the past twelve months:

*         THE STATE MONEY MARKET PORTFOLIOS--provided total returns ranging
          from +2.2% to +2.3% . . . current yields are in the area of 2.6%,
          about the same as they were twelve months ago but nicely above their
          level at the outset of the fiscal half year . . . net asset values
          remained at $1.00 per share.

*         THE STATE INSURED LONG-TERM PORTFOLIOS--reflecting the rebound in
          interest rates, turned in modest total returns ranging from +1.9% to
          +3.3% . . . current income yields are running about 5.4%, some 40
          basis points (0.40%) higher than they were twelve months ago.

       The detailed results for each of our State Tax-Free
Portfolios--including per share net asset values, dividends, and capital gains
distributions, as well as current yields--are presented on the following page.
To provide some perspective on how our Insured Long-Term Portfolios fared in
the face of rising interest rates, the table that follows summarizes the income
returns and the capital returns for each Portfolio:

<TABLE>
<CAPTION>
- - --------------------------------------------------------------------------------------------------------
                                                                       Investment Returns
                                                                       Twelve Months Ended
                                                                          May 31, 1994
Insured Long-Term                                         ----------------------------------------------
Portfolio*                                                Income              Capital              Total
- - --------------------------------------------------------------------------------------------------------
<S>                                                        <C>                 <C>                 <C>
CALIFORNIA                                                 +5.4%               -3.5%               +1.9%
NEW YORK                                                   +5.4                -3.2                +2.2
PENNSYLVANIA                                               +5.6                -2.3                +3.3
NEW JERSEY                                                 +5.3                -3.4                +1.9
OHIO                                                       +5.2                -2.8                +2.4
FLORIDA                                                    +5.1                -2.2                +2.9
- - --------------------------------------------------------------------------------------------------------
</TABLE>

*On March 4, 1994, the California Insured Intermediate-Term Portfolio was
introduced. Since its inception, the Portfolio has achieved an income return of
+1.0%, a capital return of +0.4%, and a total return of +1.4%.

* FIXED-INCOME MARKET REVIEW

The basic benchmark for the bond market is the long-term U.S. Treasury bond.
During the past six months, its yield rose from 6.3% at the start of the period
to 7.4% at its conclusion. This yield change engendered a decline of about -13%
in the Treasury bond's price. I am happy to report that the tax-exempt bond
market fared a good bit better, with the yield on long-term high-grade
municipal bonds rising from 5.5% to 6.1%, resulting in a price decline of some
- - -8%. However painful this decline may be for investors in long-term bonds, it
is worth noting that interest rates had been dropping steadily for some seven
years, and the retracement during the past six months has merely returned rates
to the level prevailing at the end of 1992.

       A primary cause of the interest rate rise was investor fears about a
resurgence of inflation. So far, at least, there is little evidence of it. The
U.S. Consumer Price Index has risen just 2.3% over the past twelve months,
although more sensitive indicators--such as commodity prices--have been rising
at a much higher rate. In an effort to quell these inflationary fears, the
Federal reserve acted to "tighten" the money supply and slow economic growth
and potential future inflation, raising the Federal funds rate (at which banks
borrow from one





                                       1
<PAGE>   2
another) four times--in February, March, April, and again in May--from 3.00% to
4.25%.

       These increases in short-term rates are often seen by market
participants as a restraint on potential inflation, and thus cause long-term
rates to fall. This time around, quite the reverse has been true. In any event,
proving that "it is an ill wind (indeed) that blows no good," the rate increase
has added to the income received by investors in our Money Market Portfolios.
And, because of the "lag" from the date interest rates rise until they are
fully manifested in money market fund yields, further dividend increases in our
Money Market Portfolios likely lie in prospect.

* IN SUMMARY

In my Chairman's letter to you one year ago, I noted that "it is hard to
imagine that the steady trend toward ever-lower interest rates can go much
further." I went on to caution that if rates did reverse their decline in
response to a strengthening economy, the capital rewards enjoyed by our
longer-term Portfolios would turn to capital penalties. While I do not presume
any forecasting ability whatsoever, these observations have proved prescient.
Nonetheless, provided that you own the Vanguard Portfolio (or combination of
Portfolios) that meets your long-term risk-reward objectives, I would urge you
to "stay the course" and avoid the temptation to make precipitate changes in
your fund holdings.

       In closing, I am pleased to note the intro-duction of a new Portfolio to
our State Tax-Free Fund stable, the California Insured Intermediate-Term
Portfolio. The Portfolio is off to a fine start, earning a total return of
+1.4% since its inception on March 4, 1994. What is more, in just three months
our assets have reached the $60 million mark. I look forward to reporting on
our results for the full 1994 fiscal year six months hence.

Sincerely,

/S/ JOHN C. BOGLE
- - ---------------------
John C. Bogle
Chairman of the Board                                         June 17, 1994


<TABLE>
<CAPTION>                           
                                                              Net Asset Value
                               Total                             Per Share             Dividends        Total Return
                          Net Assets                         -----------------     -----------------   --------------------------
                          (millions)  Average    Average     Nov. 30,  May 31,      Six       Twelve     Six    Twelve    Current
Portfolio               May 31, 1994 Maturity   Quality*       1993      1994      Months     Months   Months   Months    Yield**
- - ---------------------------------------------------------------------------------------------------------------------------------
<S>                        <C>      <C>           <C>        <C>      <C>          <C>      <C>       <C>       <C>        <C>
MONEY MARKET
CALIFORNIA                 $1,126      35 DAYS    MIG 1      $  1.00  $  1.00       $.011     $.023    +1.1%    +2.3%      2.55%
PENNSYLVANIA                1,041      37 DAYS    MIG 1         1.00     1.00        .011      .023    +1.1     +2.3       2.60
NEW JERSEY                    803      41 DAYS    MIG 1         1.00     1.00        .011      .022    +1.1     +2.2       2.46
OHIO                          139      47 DAYS    MIG 1         1.00     1.00        .011      .023    +1.2     +2.3       2.57
- - ---------------------------------------------------------------------------------------------------------------------------------
INSURED LONG-TERM
CALIFORNIA                 $  929   12.9 YEARS     Aaa       $11.30   $10.66      $ .451+    $.753+   -1.8%    +1.9%      5.58%
CALIFORNIA INTERMEDIATE-           
  TERM                         57   75.3 YEARS     Aaa        --       10.04        .101++  --        +1.4++   --         4.82
NEW YORK                      760   11.8 YEARS     Aaa        10.97    10.49        .306+     .602+   -1.6     +2.2       5.41
PENNSYLVANIA                1,430   11.7 YEARS     Aaa        11.36    10.85        .388+     .703+   -1.1     +3.3       5.47
NEW JERSEY                    700   11.5 YEARS     Aaa        11.77    11.18        .374+     .690+   -1.9     +1.9       5.41
OHIO                          162   29.7 YEARS     Aaa        11.61    11.08        .327+     .630+   -1.8     +2.4       5.48
FLORIDA                       292   12.1 YEARS     Aaa        10.86    10.38        .339+     .611+   -1.3     +2.9       5.39
- - ---------------------------------------------------------------------------------------------------------------------------------
</TABLE>

*   MIG 1 and Aaa are Moody's highest ratings for, respectively, short-term and
    long-term municipal bonds.

**  Money Market Portfolios' yields are 7-day annualized yields; others are
    30-day SEC yields.

+   Include capital gains distributions of $.152 for California, $.012 for New
    York, $.079 for Pennsylvania, $.063 for New Jersey, $.032 for Ohio, and
    $.070 for Florida.

++  Since inception, March 4, 1994.

    The shares of each of the Vanguard "single state" Portfolios are available
    for purchase solely by residents of the designated states.





                                       2
<PAGE>   3
AVERAGE ANNUAL TOTAL RETURNS



THE CURRENT YIELDS NOTED IN THE CHAIRMAN'S LETTER ARE CALCULATED IN ACCORDANCE
WITH SEC GUIDELINES. THE AVERAGE ANNUAL TOTAL RETURNS FOR THE PORTFOLIOS
(PERIODS ENDED MARCH 31, 1994) ARE AS FOLLOWS:

<TABLE>
<CAPTION>
                                                  INCEPTION                                         SINCE
PORTFOLIO                                           DATE            1 YEAR        5 YEARS         INCEPTION
- - ------------------------------------              ---------         ------        -------         ---------
<S>                                               <C>               <C>            <C>               <C>
CALIFORNIA INSURED LONG-TERM                       4/7/86           +1.77%         +8.56%            +7.70%
CALIFORNIA INSURED INTERMEDIATE-TERM               3/4/94             --             --              -0.64
CALIFORNIA MONEY MARKET                            6/1/87           +2.34          +4.05             +4.34
NEW YORK INSURED TAX-FREE                          4/7/86           +2.37          +8.97             +7.23
PENNSYLVANIA INSURED LONG-TERM                     4/7/86           +3.14          +9.22             +8.11
PENNSYLVANIA MONEY MARKET                         6/13/88           +2.31          +4.15             +4.39
NEW JERSEY INSURED LONG-TERM                       2/3/88           +2.44          +8.87             +8.65
NEW JERSEY MONEY MARKET                            2/3/88           +2.24          +4.12             +4.37
OHIO INSURED LONG-TERM                            6/18/90           +2.70            --              +9.12
OHIO MONEY MARKET                                 6/18/90           +2.31            --              +3.54
FLORIDA INSURED TAX-FREE                           9/1/92           +2.56            --              +7.01
</TABLE>

THESE DATA REPRESENT PAST PERFORMANCE. THE INVESTMENT RETURN AND PRINCIPAL
VALUE OF AN INVESTMENT WILL FLUCTUATE SO THAT AN INVESTOR'S SHARES, WHEN
REDEEMED, MAY BE WORTH MORE OR LESS THAN THEIR ORIGINAL COST.

PLEASE NOTE THAT AN INVESTMENT IN A MONEY MARKET FUND, SUCH AS A MONEY MARKET
PORTFOLIO OF THE VANGUARD STATE TAX-FREE FUNDS, IS NEITHER INSURED NOR
GUARANTEED BY THE U.S. GOVERNMENT, AND THERE IS NO ASSURANCE THAT THE FUND WILL
BE ABLE TO MAINTAIN A STABLE NET ASSET VALUE OF $1.00 PER SHARE.





                                       3
<PAGE>   4
REPORT FROM THE INVESTMENT ADVISER


STATE INSURED
LONG-TERM PORTFOLIOS

Over the past six months, the pace of domestic economic activity accelerated
sharply. Strong improvements in the rate of growth in Gross Domestic Product
(GDP), and a host of related statistics such as home sales, automobile sales,
and consumer confidence, provided ample evidence of renewed vigor. Bond markets
seldom react well to strong economic signals and this period was no exception.
The yield on the 30-year Treasury bond rose 1.1 percentage points (from 6.3% to
7.4%). During the same period, municipal bonds performed slightly better, with
the yield on long-term high-grades rising 0.6% (from 5.5% to 6.1%), producing
an 8.3% loss of value.

       As one would expect, the sharp rise in interest rates negatively
impacted the share price of the State Insured Long-Term Portfolios. To be sure,
a decline of this nature can be disconcerting to even the most resolute
long-term investor. However, following more than a decade of exceptional
returns of longer-term fixed-income assets, the poor six-month period
represents only a partial "give back" of previous prosperity. Looking beyond
the short-term share price volatility, a shareholder of the State Insured
Long-Term Portfolios can expect to receive an attractive, consistent, and
durable stream of tax-exempt dividend income.

* SUCCESSFUL STRATEGIES . . .

For the recent period, two of several core strategies stand out for enhancing
the relative returns of the State Insured Long-Term Portfolios. First, a
reduction in average maturity over the past year improved relative market
performance and moderated some of the "sting" of a bear market. Some of this
was accomplished by focusing on municipals maturing in 15 to 20 years, rather
than the slightly higher yielding but more volatile 30-year maturities. This
modest reduction in average maturity effectively "locked-in" a portion of the
gains in share price achieved in the previous bull market.

       Second, the prudent maintenance of reserve positions of about 10% of
fund assets added to our relative stability. What is more, these reserves
provided a liquidity cushion to meet shareholder redemptions. In good times,
reserves (which normally yield less than longer-term assets) forego a small
amount of yield potential. In difficult market conditions, such as prevailed
during the past six months, the additional reserves allow the portfolio to meet
redemption requests without the inopportune (and sometimes "distressed") sale
of securities.

* LOOKING FORWARD . . .

The issuance of new municipal bonds has fallen dramatically. Issuance for the
first six months in fiscal 1994 was 26% below the pace of a year earlier. Early
indications show forward supply even lower compared to the "mad dash" of 1993.
Municipalities appear to have completed the process of refinancing older,
higher coupon debt of the 1980's and early 1990's. At the same time, a record
number of previously mentioned high coupon bonds are approaching their call
dates, and a huge amount of principal will be returned to owners of individual
bonds. All things being equal, this should continue to provide more attractive
returns for municipal bonds than their taxable brethren.

       In conclusion, it would be reassuring to believe that the recent
increase in interest rates is sufficient to "rein in" the rapidly expanding
U.S. economy and dampen any inflationary expectations. Yet, that observation
might be premature. If history serves as any guide, the process may take longer
than the recent six months of "pain." If so, there could be more share price
unpleasantness ahead before the markets resume their positive return pattern of
the past decade. However, attempting to "time" the turnaround--getting out at
the highs and then getting back in at the lows--tends to be equally futile for
the institutional and individual investor alike. The best advice we know is to
endure the swings and allow the powerful tax exempt compounding of interest to
continue.





                                       4
<PAGE>   5
STATE MONEY MARKET PORTFOLIOS

The past six months ushered in a change in the Federal Reserve Board's
previously accommodative monetary policy. Since February 4, 1994, market
participants watched anxiously as the Federal Reserve Board, in four separate
instances, pushed the Federal funds rate up 125 basis points (1.25%) to 4.25%
and tightened the discount rate 50 basis points (0.50%) to 3.50%. This series
of moves by the Fed has signaled the end of stimulative policy (maintained
throughout 1993) and the initiation of a policy of "neutrality."

       The effect of the tightening on the short-term municipal market was
surprisingly mild. While yields on "first tier" taxable money market funds rose
approximately 70 basis points over the six-month period, yields on
state-specific and general purpose tax-free money funds rose a mere 35 basis
points. The primary contributor to the unresponsive municipal market was the
scarcity of new issue supply. Supply of short-term municipal securities is
quite cyclical, and depends on an issuer's fiscal year, which generally runs
from July 1 to June 30. As a result, supply typically remains light in the
months leading up to June and dramatically increases in the summer months, as
issuers prepare to fund their upcoming budgetary needs in the new fiscal year.
This lack of supply experienced during a period of rising rates in the broader
taxable markets enabled short-term municipal yields to maintain relative
stability. As technical supply factors temporarily have been depressing yields
on short-term municipal securities, we have been targeting a low average
weighted maturity for the tax-exempt money funds of 45 to 60 days. Our
Portfolios should be commensurately more responsive when new issue supply
surges and interest rates rise. We expect the shift from scarcity to abundance
will occur within weeks.

       While the market focused on an accelerating economy and the rise in
interest rates, the Securities and Exchange Commission quietly launched its own
initiative to ensure the net asset value safety of tax-exempt money funds,
consistent with those already applicable to taxable money funds. In fact, the
SEC has proposed regulations that coincide with (or in some cases are less
restrictive than) our conservative approach to managing money market funds.
Thus, they will have little impact on the Vanguard Money Market Portfolios. We
believe that the Commission's proposals, if adopted, will be a positive force
in elevating industrywide portfolio standards.

       In conclusion, the upcoming months could potentially bring about
significant regulatory and economic changes in our market.  While keeping a
watchful eye on the actions of the Federal Reserve Board and maintaining our
conservative investment approach, we look forward to capitalizing on any
opportunities that may result.

Sincerely,

Ian A. MacKinnon
Senior Vice President

Jerome J. Jacobs
Vice President

Pamela E. Wisehaupt
Vice President

David E. Hamlin
Assistant Vice President

Reid O. Smith
Assistant Vice President

Danine A. Mueller
Portfolio Manager

Vanguard Fixed Income Group

June 13, 1994





                                       5
<PAGE>   6


STATEMENT OF NET ASSETS
FINANCIAL STATEMENTS (unaudited)
                                                                    May 31, 1994
<TABLE>
<CAPTION>
                                                                                       Face                        Market
                                                                                     Amount                         Value
INSURED LONG-TERM PORTFOLIO                                                           (000)                        (000)+
- - -------------------------------------------------------------------------------------------------------------------------
<S>                                                                                <C>                            <C>
MUNICIPAL BONDS (99.4%)
- - -------------------------------------------------------------------------------------------------------------------------
ISSUER INSURED (87.5%)
  Alameda COP(Santa Rita Jail Project)5.375%, 6/1/09 (1)                           $11,300                        $10,758
  Anaheim Convention Center COP
     0.00%, 8/1/04 (1)                                                               3,120                          1,736
     0.00%, 8/1/05 (1)                                                               1,250                            648
     0.00%, 8/1/06 (1)                                                               3,125                          1,506
     5.50%, 8/1/14 (1)                                                               4,000                          3,641
  City of Barstow Redevelopment Agency
     6.25%, 9/1/22 (1)                                                               2,225                          2,210
  Brea Public Finance Auth.
     5.50%, 8/1/17 (1)                                                              11,650                         10,534
  California Education Facilities Auth.
     5.50%, 6/1/19 (1)                                                               5,000                          4,500
  California Health Facilities Auth.
     (Adventist Health System)
     6.75%, 3/1/11 (1)                                                               5,000                          5,224
     (Centinela Hosp.)
     6.50%, 9/1/08 (1)                                                               5,000                          5,238
     6.25%, 9/1/15 (1)                                                              20,400                         20,428
     (San Diego Hosp.)
     6.625%, 5/1/19 (1)                                                              6,525                          6,631
     (Unihealth America)
     7.625%, 10/1/15 (2)                                                             1,500                          1,673
  California Housing Finance Agency
     Multifamily Housing Rev.
     8.625%, 8/1/15 (1)                                                                305                            311
  California Public Works Board
     (Univ. of California)
     6.25%, 12/1/07 (2)                                                              6,945                          7,199
     6.50%, 12/1/08 (2)                                                              4,000                          4,260
  Chino Basin Finance Auth.
     Municipal Water Dist.
     6.50%, 8/1/10 (2)                                                               3,095                          3,257
     6.00%, 8/1/16 (2)                                                               5,500                          5,374
  Contra Costa COP5.50%, 6/1/12 (2)                                                  6,850                          6,348
     5.60%, 6/1/19 (2)                                                               9,395                          8,628
     6.70%, 2/1/21 (2)                                                               4,630                          4,729
  Contra Costa Transportation Auth.
     Sales Tax Rev. VRDO
     2.70%, 6/1/94 (3)                                                               1,400                          1,400
  Culver City Finance Auth.
     5.50%, 11/1/14 (2)                                                              9,225                          8,512
  Culver City Redevelopment
     Finance Auth.
     6.75%, 11/1/15 (2)                                                              1,000                          1,028
  Eastern Municipal Water Dist.
     6.75%, 7/1/12 (3)                                                               8,000                          8,675
  Elsinore Valley Municipal Water Dist. COP
     5.90%, 7/1/06 (3)                                                               1,685                          1,720
     6.00%, 7/1/12 (3)                                                               2,210                          2,195
  Encina Power Auth.
     6.875%, 8/1/11 (3)                                                              3,650                          3,797
  City of Fresno Sewer Rev.
     6.25%, 9/1/10 (2)                                                               6,395                          6,572
  Garden Grove Public Finance Auth.
     5.50%, 12/15/23 (3)                                                             2,900                          2,591
  Glendale Hosp. Rev.
     (Adventist Health System)
     6.00%, 3/1/14 (1)                                                               3,000                          2,935
  Glendale Redevelopment Agency
     7.10%, 12/1/98 (2) (Prere.)                                                     5,000                          5,553
  Indian Wells Redevelopment Agency
     5.50%, 12/1/22 (1)                                                              2,000                          1,789
  City of Industry GO
     5.875%, 7/1/10 (3)                                                              3,015                          2,979
  Kern High School Dist. GO
     6.25%, 8/1/11 (1)                                                               1,065                          1,091
     6.40%, 8/1/14 (1)                                                               1,490                          1,555
     6.40%, 8/1/15 (1)                                                               1,645                          1,719
     6.40%, 8/1/16 (1)                                                               1,815                          1,894
  LaQuinta Redevelopment Agency
     7.30%, 9/1/10 (1)                                                               1,000                          1,125
  Long Beach Financing Auth.
     5.85%, 11/1/05 (2)                                                              2,630                          2,691
     6.00%, 11/1/10 (2)                                                              3,860                          3,876
     6.00%, 11/1/17 (2)                                                              2,000                          1,958
  Los Angeles COP
     (Children's Hosp.)
     6.00%, 6/1/10 (1)                                                               1,000                          1,000
     6.00%, 6/1/11 (1)                                                               2,365                          2,357
  Los Angeles County Waste
     Water System
     5.70%, 6/1/09 (1)                                                               3,050                          2,996
     6.25%, 6/1/12 (2)                                                               4,730                          4,774
     6.00%, 12/1/12 (3)                                                             16,765                         16,617
     5.70%, 6/1/23 (1)                                                               2,000                          1,851
  MSR Public Power Agency
     6.125%, 7/1/13 (2)                                                              8,000                          7,999
     6.625%, 7/1/13 (6)                                                              2,000                          2,044
     6.75%, 7/1/20 (1)                                                              37,000                         40,066
  Modesto City School Dist. GO
     5.40%, 8/1/05 (3)                                                               1,000                            992
  Modesto Irrigation Dist.
     Finance Auth.
     6.50%, 10/1/11 (2)                                                              8,125                          8,504
     6.50%, 10/1/22 (2)                                                              9,750                         10,258
</TABLE>





                                       6
<PAGE>   7
<TABLE>
<CAPTION>
                                                                                       Face                        Market
                                                                                     Amount                         Value
                                                                                      (000)                        (000)+

- - -------------------------------------------------------------------------------------------------------------------------
  <S>                                                                             <C>                            <C>
  Mountain View Capital
     Improvement Finance Auth.
     6.25%, 8/1/12 (1)                                                            $  5,000                       $  5,041
  Northern California Power Agency
     6.00%, 7/1/08 (1)                                                               5,500                          5,583
     6.00%, 7/1/09 (1)                                                               7,530                          7,623
     5.50%, 7/1/16 (1)                                                              10,000                          9,085
     7.50%, 7/1/21 (2) (Prere.)                                                      1,810                          2,146
     5.50%, 7/1/23 (1)                                                               5,000                          4,475
  Oakland Redevelopment Agency
     6.00%, 2/1/06 (2)                                                               3,000                          3,094
     5.50%, 2/1/14 (2)                                                               5,500                          5,065
  Orange County Local
     Transportation Auth.
     5.80%, 2/15/05 (3)                                                              9,000                          9,157
     5.90%, 2/15/06 (3)                                                              8,000                          8,148
  Orange County Sanitation Dist.
     VRDO 2.80%, 6/1/94 (3)                                                          1,100                          1,100
     COP 6.00%, 8/1/01 (3) (Prere.)                                                  2,300                          2,455
  Oro Loma Sanitation Dist.
     5.20%, 10/1/16 (2)                                                              4,800                          4,192
  Palmdale Single Family Mortgage
     9.875%, 4/1/08 (3)                                                                  6                              8
  Pittsburg Redevelopment Agency
     5.50%, 8/1/07 (3)                                                               2,750                          2,702
     5.50%, 8/1/15 (3)                                                              12,700                         11,617
  Placer County Water Rev. COP
     7.75%, 7/1/18 (6)                                                               3,500                          3,869
  Pomona Unified School Dist.
     GO 5.60%, 8/1/14 (1)                                                            1,585                          1,485
     GO 5.60%, 8/1/15 (1)                                                            2,000                          1,862
     5.50%, 8/1/16 (3)                                                               1,000                            915
     GO 5.60%, 8/1/16 (1)                                                            1,000                            928
     GO 7.50%, 8/1/17 (1)                                                            2,540                          2,985
  Port Hueneme Redevelopment Agency
     5.50%, 5/1/14 (2)                                                               2,000                          1,845
  Poway Redevelopment Agency
     7.25%, 12/15/11 (3)                                                             7,500                          8,024
  Rancho Water Dist.
     6.25%, 8/1/12 (3)                                                               2,000                          2,019
     COP 7.125%, 11/1/15 (2)                                                           800                            847
  Redding Joint Power Finance Auth.
     Waste Water Rev.
     5.50%, 12/1/18 (3)                                                              2,300                          2,074
  Redlands Water COP
     7.00%, 11/1/96 (2) (Prere.)                                                     5,500                          5,926
  Riverside County Transportation Comm.
     5.75%, 6/1/08 (2)                                                               1,750                          1,742
     5.75%, 6/1/09 (2)                                                               4,795                          4,747
  Riverside Sewer Rev.5.00%, 8/1/11 (3)                                              4,520                          4,008
     5.00%, 8/1/12 (3)                                                               4,745                          4,186
  Sacramento County Public Facilities
     (Main Detention Facility Project)
     5.50%, 6/1/10 (1)                                                               4,000                          3,800
  Sacramento Finance Auth.
     5.375%, 11/1/14 (2)                                                             4,000                          3,638
     5.40%, 11/1/20 (2)                                                              7,000                          6,260
  Sacramento Municipal Utility Dist.
     6.25%, 8/15/07 (1)                                                              4,000                          4,121
     6.25%, 8/15/10 (1)                                                             32,550                         33,382
     5.75%, 8/15/13 (1)                                                             18,295                         17,435
     6.50%, 9/1/13 (1)                                                               8,895                          9,419
     6.16%, 8/15/18 (1)                                                              8,000                          7,989
  Sacramento Redevelopment Agency
     6.50%, 11/1/13 (1)                                                              2,500                          2,555
  San Diego County Transportation Comm.
     5.25%, 4/1/06 (3)                                                               9,000                          8,752
  San Diego Redevelopment Agency
     6.00%, 9/1/18 (2)                                                               6,500                          6,321
  San Francisco Airport Comm.
     6.20%, 5/1/06 (2)                                                              10,000                         10,451
     6.20%, 5/1/08 (2)                                                               1,000                          1,037
     6.00%, 5/1/10 (1)                                                               2,000                          2,009
     6.00%, 5/1/11 (1)                                                               2,000                          2,000
     6.00%, 5/1/20 (1)                                                               6,500                          6,317
  San Francisco Bay Area Rapid Transit
     6.75%, 7/1/10 (2)                                                               6,370                          6,865
     6.75%, 7/1/11 (2)                                                               7,455                          8,005
  San Francisco City & County
     Airport Rev.
     6.40%, 5/1/05 (1)                                                               3,080                          3,292
     6.50%, 5/1/06 (1)                                                               3,280                          3,494
     6.60%, 5/1/07 (1)                                                               2,490                          2,651
     6.625%, 5/1/08 (1)                                                              3,720                          3,972
     6.70%, 5/1/09 (1)                                                               3,970                          4,246
  San Joaquin County COP
     (Human Services Project)
     6.70%, 5/15/99 (6) (Prere.)                                                     2,800                          3,070
  San Joaquin County Public Facility
     Finance Corp. COP
     5.00%, 11/15/09 (1)                                                             1,000                            913
     5.00%, 11/15/10 (1)                                                             1,110                            996
     5.50%, 11/15/13 (1)                                                             3,895                          3,620
  San Jose Airport Rev.
     5.875%, 3/1/07 (3)                                                              7,085                          7,189
     5.75%, 3/1/16 (1)                                                               4,350                          4,127
</TABLE>





                                       7
<PAGE>   8
STATEMENT OF NET ASSETS (continued)
<TABLE>
<CAPTION>
                                                                                       Face                        Market
                                                                                     Amount                         Value
                                                                                      (000)                        (000)+

- - -------------------------------------------------------------------------------------------------------------------------
<S>                                                                               <C>                           <C>
  San Jose Merged Area
     Redevelopment Rev.
     6.00%, 8/1/11 (1)                                                            $  8,845                       $  8,844
     6.00%, 8/1/15 (1)                                                               3,000                          2,950
  San Jose Santa Clara CleanWater Auth.
     7.00%, 10/1/04 (1)                                                              5,615                          6,107
  San Mateo County Finance Auth.
     6.50%, 7/1/13 (1)                                                              14,560                         15,414
     6.50%, 7/1/15 (1)                                                               4,235                          4,460
  San Mateo Sewer
     6.60%, 8/1/14 (1)                                                               2,500                          2,540
  San Mateo Transportation
     5.25%, 6/1/15 (1)                                                               8,215                          7,297
  Santa Ana Community
     Redevelopment Auth.
     7.375%, 12/1/96 (3) (Prere.)                                                    1,695                          1,844
     7.40%, 12/1/96 (3) (Prere.)                                                       270                            294
  Santa Clara Redevelopment Agency
     7.00%, 7/1/10 (2)                                                               7,000                          7,723
  Santa Fe Springs Redevelopment
     Agency
     6.00%, 9/1/14 (1)                                                               5,350                          5,245
  Santa Rosa Waste Water Rev.
     6.25%, 9/1/12 (3)                                                               7,075                          7,154
     6.00%, 7/2/15 (2)                                                               7,000                          6,860
     6.00%, 9/1/15 (3)                                                               5,580                          5,468
     5.25%, 9/1/16 (3)                                                               3,000                          2,655
  South Coast Air Quality
     Management Dist.
     6.00%, 8/1/11 (2)                                                               3,200                          3,186
     5.50%, 8/1/14 (1)                                                               8,000                          7,334
  South County Water Auth.
     5.50%, 8/1/22 (3)                                                               8,000                          7,160
  South Orange County Public Finance Auth.
     7.00%, 9/1/10 (1)                                                               3,300                          3,654
     7.00%, 9/1/11 (1)                                                               3,000                          3,316
  Southern California Public
     Power Auth.(Palo Verde)
     7.00%, 7/1/07 (2)                                                               1,600                          1,683
     6.60%, 7/1/08 (2)                                                               4,280                          4,398
     7.00%, 7/1/10 (2)                                                               2,500                          2,629
     (San Juan)
     TOB VRDO 2.85%, 7/1/94 (1)                                                     18,645                         18,645
  Southern California Rapid Transit Dist.
     5.75%, 9/1/05 (2)                                                               5,000                          5,112
     5.80%, 9/1/06 (2)                                                               3,900                          3,958
     5.90%, 9/1/07 (2)                                                               4,800                          4,875
  Sweetwater Water Rev.
     7.00%, 4/1/99 (2) (Prere.)                                                      3,050                          3,358
     7.00%, 4/1/10 (2)                                                               1,950                          2,076
  Three Valley Municipal
     Water Dist. COP
     7.30%, 11/1/96 (1) (Prere.)                                                     3,200                          3,498
     5.25%, 11/1/10 (3)                                                              4,220                          3,884
  Torrance COP
     7.20%, 4/1/16 (2)                                                               4,050                          4,284
  Transmission Agency of Northern
     California
     5.25%, 5/1/08 (1)                                                               4,000                          3,792
  Tri City Hosp. Dist.
     (Oceanside Hosp.)
     7.00%, 2/1/12 (1)                                                               5,950                          6,341
  Tulare County COP
     5.80%, 11/15/04 (1)                                                             1,000                          1,025
     5.875%, 11/15/05 (1)                                                            1,000                          1,026
  Turlock Irrigation Dist. COP
     6.75%, 1/1/12 (3)                                                               2,130                          2,200
     6.75%, 1/1/13 (3)                                                               3,155                          3,218
  Turlock Irrigation Dist.
     Water & Electric
     5.75%, 1/1/18 (1)                                                               1,150                          1,081
  Ukiah Electric Rev.
     6.00%, 6/1/08 (1)                                                               4,565                          4,660
     6.25%, 6/1/18 (1)                                                               6,000                          6,105
  Univ. of California
     Board of Regents
     6.00%, 9/1/08 (1)                                                               2,515                          2,547
     6.00%, 9/1/12 (1)                                                               3,530                          3,503
     6.00%, 9/1/13 (1)                                                               3,320                          3,271
  Walnut Finance Auth.
     6.00%, 9/1/15 (1)                                                               5,000                          4,900
  Walnut Valley School Dist.
     6.20%, 8/1/09 (2)                                                               1,270                          1,310
     6.00%, 8/1/12 (2)                                                               1,790                          1,782
     6.00%, 8/1/13 (2)                                                               1,980                          1,960
     6.00%, 8/1/14 (2)                                                               2,205                          2,172
     6.00%, 8/1/15 (2)                                                               2,470                          2,429
     6.00%, 8/1/16 (2)                                                               2,690                          2,644
  West Sacramento Financing Auth.
     5.25%, 8/1/08 (3)                                                               2,160                          2,050
                                                                                                                ---------
        GROUP TOTAL                                                                                               812,746
                                                                                                                ---------
- - -------------------------------------------------------------------------------------------------------------------------
PORTFOLIO INSURED (.1%)
  Riverside Hosp. Dist.
     (Kaiser Permanente Medical Center)
     9.00%, 12/1/15                                                                    300                            324
  Sacramento Municipal Utility Dist.
     8.00%, 11/15/10                                                                   205                            205
                                                                                                                ---------
        GROUP TOTAL                                                                                                   529
                                                                                                                ---------
- - -------------------------------------------------------------------------------------------------------------------------
</TABLE>





                                       8
<PAGE>   9
<TABLE>
<CAPTION>
                                                                                       Face                        Market
                                                                                     Amount                         Value
                                                                                      (000)                        (000)+
- - -------------------------------------------------------------------------------------------------------------------------
<S>                                                                               <C>                            <C>
SECONDARY MARKET INSURED (4.0%)
  California Housing Finance Agency
     (Single Family Mortgage)
     6.90%, 8/1/16 (6)                                                            $  5,750                       $  5,845
  California Public Works Board
     (Department of Corrections)
     6.50%, 9/1/17 (2)                                                              30,000                         31,438
                                                                                                                ---------
        GROUP TOTAL                                                                                                37,283
                                                                                                                ---------
- - -------------------------------------------------------------------------------------------------------------------------
NON-INSURED (7.8%)
  California Health Facilities
     Auth. VRDO
     2.55%, 6/1/94                                                                   1,625                          1,625
  California PCR VRDO
     (Southern California Edison)
     3.40%, 6/1/94                                                                   1,700                          1,700
  California State RAN
     3.50%, 6/28/94                                                                  4,000                          4,000
  California State RAW
     3.50%, 7/26/94                                                                  8,700                          8,703
  California Water Department
     7.00%, 12/1/11                                                                  2,585                          2,896
     7.00%, 12/1/12                                                                  4,520                          5,081
  Irvine City Assessment Dist. VRDO
     2.80%, 6/1/94                                                                   1,300                          1,300
  Irvine Ranch Water Dist. VRDO
     2.85%, 6/1/94                                                                   3,400                          3,400
     2.80%, 6/1/94                                                                   1,500                          1,500
  Kern County High School Dist.
     TRAN
     3.25%, 7/21/94                                                                  5,000                          5,000
  Los Angeles County TRAN
     3.00%, 6/30/94                                                                  4,200                          4,198
  Los Angeles Department of
     Water & Power
     6.50%, 4/1/10                                                                   3,950                          4,309
  Orange County VRDO (Irvine Co.)
     2.90%, 6/1/94                                                                   1,100                          1,100
  Orange County Sanitation Dist. COP VRDO
     2.80%, 6/1/94                                                                     700                            700
  Orange County Water Dist. COP VRDO
     2.80%, 6/1/94                                                                     200                            200
  Pasadena Electric Works Rev.
     5.375%, 8/1/12                                                                  7,040                          6,483
  Riverside VRDO
     2.95%, 6/1/94                                                                  20,500                         20,500
                                                                                                                ---------
        GROUP TOTAL                                                                                                72,695
                                                                                                                ---------
- - -------------------------------------------------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS (Cost $916,282)                                                                             923,253
- - -------------------------------------------------------------------------------------------------------------------------
</TABLE>



<TABLE>
<CAPTION>
                                                                                                                  Market
                                                                                                                   Value
                                                                                                                  (000)+
<S>                                                                                                             <C>
- - -------------------------------------------------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (.6%)
- - -------------------------------------------------------------------------------------------------------------------------
Other Assets--Note B                                                                                            $  27,831
Liabilities                                                                                                       (22,065)
                                                                                                                ---------
                                                                                                                    5,766
- - -------------------------------------------------------------------------------------------------------------------------
NET ASSETS (100%)
- - -------------------------------------------------------------------------------------------------------------------------
Applicable to 87,120,703 outstanding shares
  of beneficial interest
  (unlimited authorization--no par value)                                                                        $929,019
- - -------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                                                          $10.66
=========================================================================================================================
</TABLE>

+ See Note A to Financial Statements.
For explanations of abbreviations and other references, see page 13.

<TABLE>
<CAPTION>
- - -------------------------------------------------------------------------------------------------------------------------
AT MAY 31, 1994, NET ASSETS  CONSISTED OF:
- - -------------------------------------------------------------------------------------------------------------------------
                                                                                    Amount                            Per
                                                                                     (000)                          Share
                                                                                  --------                         ------
<S>                                                                               <C>                              <C>
Paid in Capital                                                                   $910,624                         $10.45
Undistributed Net Investment Income                                                     --                             --
Accumulated Net Realized Gains                                                       7,128                            .08
Unrealized Appreciation of Investments--Note D                                      11,267                            .13
- - -------------------------------------------------------------------------------------------------------------------------
NET ASSETS                                                                        $929,019                         $10.66
- - -------------------------------------------------------------------------------------------------------------------------
</TABLE>





                                       9
<PAGE>   10
STATEMENT OF NET ASSETS (continued)

<TABLE>
<CAPTION>
                                                                                       Face                        Market
INSURED INTERMEDIATE-TERM                                                            Amount                         Value
PORTFOLIO                                                                             (000)                        (000)+
- - -------------------------------------------------------------------------------------------------------------------------
<S>                                                                                <C>                            <C>
MUNICIPAL BONDS (104.7%)
- - -------------------------------------------------------------------------------------------------------------------------
ISSUER INSURED (97.6%)
  California Housing Finance Agency VRDO
     2.55%, 6/1/94 (1)                                                             $   500                        $   500
  California Public Works Board
     (Univ. of California Regents)
     6.25%, 12/1/07 (2)                                                              1,000                          1,037
  Central Coast Water Auth.
     5.65%, 10/1/01 (2)                                                                695                            714
     6.05%, 10/1/04 (2)                                                              1,800                          1,881
  Clovis COP
     (Clovis Community Hosp.)
     8.75%, 2/1/95 (2) (Prere.)                                                      1,800                          1,897
  Contra Costa Transportation Auth. VRDO
     2.70%, 6/1/94 (3)                                                               1,500                          1,500
  City of Corona Redevelopment Project
     7.50%, 9/1/04 (3)                                                                 970                          1,123
     7.50%, 9/1/05 (3)                                                               1,040                          1,205
  Culver City Redevelopment Finance Auth.
     6.75%, 11/1/99 (2) (Prere.)                                                     2,500                          2,751
  Elsinore Valley Municipal Water Dist.
     COP 5.90%, 7/1/05 (3)                                                           1,730                          1,777
     6.00%, 7/1/07 (3)                                                               1,650                          1,691
  LaQuinta Redevelopment Agency
     8.00%, 9/1/03 (1)                                                               1,325                          1,573
  Long Beach Financing Auth.
     5.85%, 11/1/05 (2)                                                              1,000                          1,023
  Los Angeles County
     Transportation Comm.
     Sales Tax Rev. VRDO
     2.70%, 7/1/94 (3)                                                                 600                            600
  MSR Public Power Agency
     (San Juan Project)
     5.85%, 7/1/06 (2)                                                               2,000                          2,044
  Modesto City School Dist.
     5.40%, 8/1/05 (3)                                                                 615                            610
  Oakland Redevelopment Agency
     (Central Dist. Project)
     6.00%, 2/1/06 (2)                                                               2,125                          2,191
  Orange County Sanitation Dist. COP
     6.00%, 8/1/01 (3) (Prere.)                                                      1,500                          1,601
     6.40%, 8/1/07 (3)                                                               1,415                          1,482
  Rancho Water Dist. COP
     7.125%, 11/1/95 (2) (Prere.)                                                      200                            212
  Redding Electric System Rev. COP
     7.125%, 7/1/97 (1) (Prere.)                                                     1,000                          1,088
  Sacramento Municipal Utility Dist.
     6.25%, 8/15/07 (1)                                                              1,000                          1,030
  Sacramento Redevelopment Agency
     (Merged Downtown Project)
     6.50%, 11/1/05 (1)                                                              1,000                          1,082
  San Diego County Regional
     Transportation Comm. VRDO
     2.75%, 6/1/94 (3)                                                                 530                            530
  San Diego Redevelopment Agency
     (Centre City Project)
     5.80%, 9/1/03 (2)                                                               2,210                          2,278
  San Francisco City and County Airport Rev.
     6.60%, 5/1/07 (1)                                                               1,000                          1,065
  City of San Francisco Sewer Rev.
     5.70%, 10/1/04 (2)                                                                185                            190
  San Joaquin County COP
     (Human Services Project)
     6.70%, 5/15/99 (6) (Prere.)                                                     2,500                          2,741
  San Jose Merged Area Redevelopment Project
     7.50%, 8/1/96 (1) (Prere.)                                                      1,000                          1,082
  San Jose Santa Clara Clean Water Finance Auth.
     7.25%, 10/1/02 (1)                                                              1,500                          1,635
  South Orange County Public Finance Auth.
     7.00%, 9/1/05 (1)                                                               2,615                          2,914
  Southern California Public Power Auth.
     (Palo Verde)
     7.00%, 7/1/07 (2)                                                               1,300                          1,367
     (Transmission Project) VRDO
     2.70%, 7/1/94 (2)                                                                 570                            570
  Southern California Rapid Transit Dist.
     5.75%, 9/1/05 (2)                                                                 310                            317
  Three Valley Municipal Water Dist. COP
     7.30%, 11/1/96 (1) (Prere.)                                                     1,000                          1,093
  Tri-City Hosp. Dist. (Oceanside Care)
     7.00%, 2/1/05 (1)                                                                 915                            975
  Tulare County COP
     5.70%, 11/15/03 (1)                                                             1,000                          1,019
  Univ. of California
     Board of Regents
     10.00%, 9/1/02 (1)                                                              2,950                          3,843
  Visalia Waste Water System Rev.
     6.00%, 12/1/07 (1)                                                              1,000                          1,024
  West Basin Water Dist.
     6.80%, 8/1/00 (2) (Prere.)                                                      2,000                          2,212
                                                                                                                  -------
        GROUP TOTAL                                                                                                55,467
                                                                                                                  -------
- - -------------------------------------------------------------------------------------------------------------------------
NON-INSURED (7.1%)
  California Health Facilities Auth. VRDO
     (Daughters of Charity Health System-West)
     2.90%, 6/1/94                                                                     200                            200
</TABLE>





                                       10
<PAGE>   11
<TABLE>
<CAPTION>
                                                                                       Face                        Market
                                                                                     Amount                         Value
                                                                                      (000)                        (000)+
- - -------------------------------------------------------------------------------------------------------------------------
<S>                                                                                <C>                            <C>
  Kern County VRDO
     2.65%, 6/1/94                                                                 $   300                        $   300
  Orange County VRDO
     2.90%, 6/1/94                                                                     200                            200
  Orange County Sanitation
     Dist. COP VRDO
     2.80%, 6/1/94                                                                     200                            200
  Riverside VRDO
     2.95%, 6/1/94                                                                   2,150                          2,150
  Santa Clara VRDO
     (El Camino Hosp.
     Dist.-Valley Medical)
     2.90%, 6/1/94                                                                   1,000                          1,000
                                                                                                                  -------
        GROUP TOTAL                                                                                                 4,050
                                                                                                                  -------
- - -------------------------------------------------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS (Cost $59,149)                                                                               59,517
- - -------------------------------------------------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (-4.7%)
- - -------------------------------------------------------------------------------------------------------------------------
Other Assets--Note B                                                                                                1,906
Payable for Securities Purchased                                                                                   (4,483)
Other Liabilities                                                                                                     (71)
                                                                                                                  -------
                                                                                                                   (2,648)
- - -------------------------------------------------------------------------------------------------------------------------
NET ASSETS (100%)
- - -------------------------------------------------------------------------------------------------------------------------
  Applicable to 5,665,104 outstanding shares
     of beneficial interest
     (unlimited authorization--no par value)                                                                      $56,869
- - -------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                                                          $10.04
=========================================================================================================================
</TABLE>

+See Note A to Financial Statements.
For explanations of abbreviations and other references, see page 13.


<TABLE>
<CAPTION>
- - -------------------------------------------------------------------------------------------------------------------------
AT MAY 31, 1994, NET ASSETS  CONSISTED OF:
- - -------------------------------------------------------------------------------------------------------------------------
                                                                                    Amount                            Per
                                                                                     (000)                          Share
                                                                                   -------                         ------
<S>                                                                                <C>                             <C>
Paid in Capital                                                                    $56,450                          $9.97
Undistributed Net Investment Income                                                     --                             --
Accumulated Net Realized Gains                                                          23                             --
Unrealized Appreciation of Investments--Note D                                         396                            .07
- - -------------------------------------------------------------------------------------------------------------------------
NET ASSETS                                                                         $56,869                         $10.04
- - -------------------------------------------------------------------------------------------------------------------------
</TABLE>



<TABLE>
<CAPTION>
                                                                                       Face                        Market
                                                                                     Amount                         Value
MONEY MARKET PORTFOLIO                                                                (000)                        (000)+
- - -------------------------------------------------------------------------------------------------------------------------
<S>                                                                               <C>                            <C>
MUNICIPAL BONDS (99.7%)
- - -------------------------------------------------------------------------------------------------------------------------
  Alameda County TRAN
     3.25%, 7/29/94                                                               $  9,000                       $  9,013
  Anaheim City Public Improvement
     Corp. COP VRDO
     2.70%, 6/1/94 (2)                                                              33,900                         33,900
  California Dept. Water
     Resource TOB VRDO
     (Central Valley Project)
     2.70%, 6/2/94                                                                  25,285                         25,285
  California Health Facilities
     Finance Auth. VRDO
     2.80%, 6/1/94                                                                   6,700                          6,700
     (Adventist Health System
     & West Sutter Health)
     2.65%, 6/2/94                                                                  24,100                         24,100
     (Catholic Health Care West)
     2.55%, 6/1/94 (1)                                                              39,175                         39,175
     (Daughters of Charity)
     2.85%, 6/1/94                                                                  41,100                         41,100
     (Kaiser Permanente)
     2.65%, 6/1/94                                                                  11,100                         11,100
  California PCR Finance Auth.
     (Pacific Gas & Electric) CP
     3.20%, 7/6/94                                                                  22,000                         22,000
     2.80%, 7/11/94                                                                  7,500                          7,500
     3.20%, 7/18/94                                                                  5,500                          5,500
     3.05%, 9/22/94                                                                 15,500                         15,500
     (Southern California Edison)
     VRDO 3.40%, 6/1/94                                                              4,100                          4,100
  California State GO TOB
     3.35%, 11/1/94*                                                                 9,000                          9,000
  California State RAN
     3.50%, 6/28/94                                                                 37,200                         37,223
  California State RAW
     3.50%, 7/26/94                                                                 22,200                         22,224
     3.75%, 12/21/94                                                                35,000                         35,098
  California Statewide
     Communities Development Auth.
     3.25%, 6/30/94                                                                  8,000                          8,004
  Clovis Unified School Dist. TRAN
     3.00%, 6/29/94                                                                  8,000                          8,002
  Contra Costa County TRAN
     3.25%, 7/29/94                                                                  8,500                          8,499
  Contra Costa Transportation Auth. VRDO
     2.70%, 6/1/94 (3)                                                              16,000                         16,000
  Foothill/Eastern Transport Correction Agency VRDO
     2.50%, 6/2/94                                                                   5,000                          5,000
  City of Fullerton TRAN
     3.00%, 7/29/94                                                                  5,000                          5,001
</TABLE>





                                       11
<PAGE>   12
STATEMENT OF NET ASSETS (continued)
<TABLE>
<CAPTION>
                                                                                       Face                        Market
                                                                                     Amount                         Value
                                                                                      (000)                        (000)+
- - -------------------------------------------------------------------------------------------------------------------------
<S>                                                                               <C>                           <C>
  City of Irvine Assessment Dist.
     CP 3.20%, 7/14/94                                                            $  6,953                       $  6,953
     VRDO 2.80%, 6/1/94                                                              2,100                          2,100
  Irvine Ranch Water Dist. VRDO
     2.85%, 6/1/94                                                                   2,300                          2,300
  Kern County Board of Education TRAN
     3.25%, 6/30/94                                                                  2,500                          2,501
  Kern County TRAN
     3.25%, 7/5/94                                                                   8,000                          8,003
  Kern County VRDO
     2.65%, 6/1/94                                                                  31,700                         31,700
  Long Beach County TRAN
     3.25%, 9/21/94                                                                  6,000                          6,007
  Los Angeles County
     Metropolitan Transit Auth.
     TOB VRDO 2.95%, 6/2/94                                                          2,920                          2,920
     CP 3.05%, 7/21/94                                                              35,921                         35,921
  Los Angeles County School Comm.
     College Dist.
     3.25%, 6/30/94                                                                 17,000                         17,005
  Los Angeles County TRAN
     CP 2.60%, 6/2/94                                                               41,300                         41,300
     3.00%, 6/30/94                                                                 31,555                         31,557
  Los Angeles County
     Transportation Comm.
     CP 3.00%, 8/11/94                                                              15,000                         15,000
     VRDO 2.70%, 6/1/94 (3)                                                          7,900                          7,900
  Los Angeles County Unified
     School Dist. TRAN3.25%, 7/15/94                                                50,500                         50,520
  Los Angeles Dept. of Water
     & Power TOB
     2.50%, 6/15/94*                                                                15,500                         15,500
  City of Oakland Health
     Facilities VRDO
     (Children's Hosp.)
     2.80%, 6/1/94                                                                   7,215                          7,215
  Orange County Sanitation
     Dist. COP VRDO
     2.55%, 6/2/94 (2)                                                              39,200                         39,200
  Orange County School Dist. TRAN
     3.25%, 7/29/94                                                                  6,700                          6,703
  Orange County TRAN
     3.00%, 6/30/94                                                                  5,500                          5,502
  Orange County Water Dist.
     COP VRDO
     2.80%, 6/1/94                                                                   3,400                          3,400
  Riverside County TRAN
     VRDO 2.35%, 6/7/94                                                             12,835                         12,835
     CP 2.95%, 6/8/94                                                               13,700                         13,700
     3.00%, 6/30/94                                                                 22,500                         22,501
  Sacramento County VRDO
     (Administration Center
     & Courthouse)
     2.65%, 6/2/94                                                                  26,150                         26,150
  Sacramento Municipal Utility
     Dist. TOB VRDO
     3.143%, 6/2/94 (1)                                                             12,185                         12,185
  Saddleback Valley Unified
     School Dist. TRAN
     3.25%, 6/30/94                                                                 28,000                         28,011
  San Diego County Regional
     Transportation Comm. VRDO
     2.75%, 6/1/94 (3)                                                              31,800                         31,800
  San Diego County TRAN
     3.25%, 7/29/94                                                                 51,000                         51,056
  San Diego Local Govt. TRAN
     COP 3.25%, 6/30/94                                                             26,000                         26,008
  San Mateo County COP VRDO
     2.60%, 6/7/94                                                                   1,525                          1,525
  San Mateo County TRAN
     3.00%, 6/30/94                                                                 20,300                         20,304
  Santa Clara (El Camino
     Hosp.-Valley Medical) VRDO
     2.30%, 6/7/94                                                                  22,300                         22,300
  Santa Clara County TRAN
     3.25%, 7/29/94                                                                 25,000                         25,012
  Southern California Metropolitan
     Water Dist. TOB VRDO
     2.839%, 6/2/94                                                                  7,980                          7,980
     2.85%, 6/7/94                                                                   5,630                          5,630
     2.45%, 8/4/94*                                                                  8,380                          8,380
  Southern California Public
     Power Auth.
     (Transmission Project)
     VRDO 2.70%, 6/1/94 (3)                                                         31,230                         31,230
     11.25%, 1/1/95 (Prere.)                                                         3,445                          3,701
  Torrance Hosp. Rev. VRDO
     (Little Co. of Mary-
     Torrance Memorial Medical Center)
     2.95%, 6/2/94                                                                   4,000                          4,000
  Ventura County Solid Waste
     Sanitary Dist. VRDO
     2.75%, 6/1/94                                                                   2,800                          2,800
  Ventura County TRAN
     3.00%, 8/1/94                                                                  26,500                         26,508
- - -------------------------------------------------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
     (Cost $1,121,847)                                                                                          1,121,847
- - -------------------------------------------------------------------------------------------------------------------------
</TABLE>





                                       12
<PAGE>   13
<TABLE>
<CAPTION>
                                                                                                                   Market
                                                                                                                    Value
                                                                                                                   (000)+
- - -------------------------------------------------------------------------------------------------------------------------
<S>                                                                                                           <C>
OTHER ASSETS AND LIABILITIES (.3%)
- - -------------------------------------------------------------------------------------------------------------------------
  Other Assets--Note B                                                                                        $    23,788
  Liabilities                                                                                                     (20,021)
                                                                                                                    3,767
- - -------------------------------------------------------------------------------------------------------------------------
  NET ASSETS (100%)
- - -------------------------------------------------------------------------------------------------------------------------
  Applicable to 1,125,674,890 outstanding shares
     of beneficial interest (unlimited
     authorization--no par value)                                                                              $1,125,614
- - -------------------------------------------------------------------------------------------------------------------------
  NET ASSET VALUE PER SHARE                                                                                         $1.00
=========================================================================================================================
</TABLE>

+See Note A to Financial Statements.

<TABLE>
<CAPTION>
- - -------------------------------------------------------------------------------------------------------------------------
AT MAY 31, 1994, NET ASSETS  CONSISTED OF:
- - -------------------------------------------------------------------------------------------------------------------------
                                                                                    Amount                            Per
                                                                                     (000)                          Share
                                                                                ----------                          -----
  <S>                                                                           <C>                                 <C>
  Paid in Capital                                                               $1,125,688                          $1.00
  Undistributed Net Investment Income                                                   --                             --
  Accumulated Net
     Realized Losses                                                                   (74)                            --
  Unrealized Appreciation
     of Investments                                                                     --                             --
- - -------------------------------------------------------------------------------------------------------------------------
  NET ASSETS                                                                    $1,125,614                          $1.00
- - -------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1) MBIA (Municipal Bond Insurance Association)
(2) AMBAC (AMBAC Indemnity Corporation)
(3) FGIC (Financial Guaranty Insurance Company)
(4) FSA (Financial Security Assurance)
(5) CGI (Capital Guaranty Insurance)
(6) BIGI (Bond Investors Guaranty Insurance)
(7) Connie Lee Inc.
(8) FHA (Federal Housing Authority)
COP--Certificate of Participation
CP--Commercial Paper
GO--General Obligation
PCR--Pollution Control Revenue
RAN--Revenue Anticipation Note
RAW--Revenue Anticipation Warrant
TOB--Tender Option Bond
TRAN--Tax Revenue Anticipation Note
VRDO--Variable Rate Demand Obligation
(Prere.)--Prerefunded
*Put Option Obligation.





                                       13
<PAGE>   14
STATEMENT OF OPERATIONS



<TABLE>
<CAPTION>
                                                                                    INSURED
                                                              INSURED         INTERMEDIATE-                   MONEY
                                                            LONG-TERM                  TERM                  MARKET
                                                            PORTFOLIO             PORTFOLIO               PORTFOLIO
- - -------------------------------------------------------------------------------------------------------------------
                                                     Six Months Ended            March 4 to        Six Months Ended
                                                         May 31, 1994          May 31, 1994            May 31, 1994
                                                                (000)                 (000)                   (000)
- - -------------------------------------------------------------------------------------------------------------------
<S>                                                <C>       <C>             <C>       <C>     <C>         <C>
INVESTMENT INCOME
  INCOME
    Interest  . . . . . . . . . . . . . . .                  $ 28,714                  $360                $13,232
- - -------------------------------------------------------------------------------------------------------------------
        Total Income  . . . . . . . . . . .                    28,714                   360                 13,232
- - -------------------------------------------------------------------------------------------------------------------
 EXPENSES
   The Vanguard Group--Note B
     Investment Advisory Services . . . . .        $  57                      --                $    54
     Management and Administrative  . . . .          813                     $13                    843
     Marketing and Distribution . . . . . .          121          991         --         13         142      1,039
                                                   -----                     ---                -------
   Insurance Expense  . . . . . . . . . . .                         1                    --                     --
   Auditing Fees  . . . . . . . . . . . . .                         4                     1                      4
   Shareholders' Reports  . . . . . . . . .                        19                     1                     15
   Annual Meeting and Proxy Costs . . . . .                         3                    --                      2
   Trustees' Fees and Expenses  . . . . . .                         3                    --                      3
- - -------------------------------------------------------------------------------------------------------------------
        Total Expenses  . . . . . . . . . .                     1,021                    15                  1,063
- - -------------------------------------------------------------------------------------------------------------------
          Net Investment Income . . . . . .                    27,693                   345                 12,169
- - -------------------------------------------------------------------------------------------------------------------
REALIZED NET GAIN (LOSS)
   Investment Securities Sold . . . . . . .                     9,761                    --                    (22)
   Futures Contracts  . . . . . . . . . . .                     8,406                    23                     --
- - -------------------------------------------------------------------------------------------------------------------
          Realized Net Gain (Loss)  . . . .                    18,167                    23                    (22)
- - -------------------------------------------------------------------------------------------------------------------
CHANGE IN UNREALIZED APPRECIATION
  (DEPRECIATION)
    Investment Securities . . . . . . . . .                   (67,837)                  368                     --
    Futures Contracts . . . . . . . . . . .                     2,970                    28                     --
- - -------------------------------------------------------------------------------------------------------------------
          Change in Unrealized
            Appreciation (Depreciation) . .                   (64,867)                  396                     --
- - -------------------------------------------------------------------------------------------------------------------
          Net Increase (Decrease) in Net
            Assets Resulting from
            Operations  . . . . . . . . . .                  $(19,007)                 $764                $12,147
===================================================================================================================
</TABLE>





                                       14
<PAGE>   15
STATEMENT OF CHANGES IN NET ASSETS


<TABLE>
<CAPTION>
                                                                                                INSURED
                                                                             INSURED      INTERMEDIATE-                     MONEY
                                                                            LONG-TERM              TERM                    MARKET
                                                                            PORTFOLIO         PORTFOLIO                 PORTFOLIO
- - ---------------------------------------------------------------------------------------------------------------------------------
                                                               SIX MONTHS                       MARCH 4   SIX MONTHS
                                                                    ENDED  Year Ended                to        ENDED   Year Ended
                                                                  MAY 31,    Nov. 30,           MAY 31,      MAY 31,     Nov. 30,
                                                                     1994        1993              1994         1994         1993
                                                                    (000)       (000)             (000)        (000)        (000)
- - ---------------------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>           <C>                  <C>       <C>           <C>
INCREASE (DECREASE) IN NET ASSETS
OPERATIONS
   Net Investment Income  . . . . . . . . . . . . . . . . . $     27,693  $    53,842          $    345  $    12,169   $   20,882
   Realized Net Gain (Loss) . . . . . . . . . . . . . . . .       18,167        4,826                23          (22)          14
   Change in Unrealized
     Appreciation (Depreciation)  . . . . . . . . . . . . .      (64,867)      45,930               396           --           --
- - ---------------------------------------------------------------------------------------------------------------------------------
         Net Increase (Decrease) in Net Assets
           Resulting from Operations  . . . . . . . . . . .      (19,007)     104,598               764       12,147       20,896
- - ---------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS (1)
   Net Investment Income  . . . . . . . . . . . . . . . . .      (27,693)     (53,842)             (345)     (12,169)     (20,882)
   Realized Net Gain  . . . . . . . . . . . . . . . . . . .      (14,386)     (15,193)               --           --           --
- - ---------------------------------------------------------------------------------------------------------------------------------
         Total Distributions  . . . . . . . . . . . . . . .      (42,079)     (69,035)             (345)     (12,169)     (20,882)
- - ---------------------------------------------------------------------------------------------------------------------------------
CAPITAL SHARE TRANSACTIONS (2)
   Issued     -- Regular  . . . . . . . . . . . . . . . . .       76,373      319,720             8,712      466,341      832,642
              -- In Lieu of Cash Distributions    . . . . .       31,157       51,774               262       11,418       19,557
              -- Exchange   . . . . . . . . . . . . . . . .       57,480      129,416            53,431      205,426      258,659
   Redeemed   -- Regular  . . . . . . . . . . . . . . . . .      (97,839)    (131,693)           (1,256)    (442,234)    (686,768)
              -- Exchange   . . . . . . . . . . . . . . . .     (151,494)    (158,317)           (4,699)    (121,041)    (212,367)
- - ---------------------------------------------------------------------------------------------------------------------------------
         Net Increase (Decrease) from
           Capital Share Transactions   . . . . . . . . . .      (84,323)     210,900            56,450      119,910      211,723
- - ---------------------------------------------------------------------------------------------------------------------------------
         Total Increase (Decrease)  . . . . . . . . . . . .     (145,409)     246,463            56,869      119,888      211,737
- - ---------------------------------------------------------------------------------------------------------------------------------
NET ASSETS
   Beginning of Period  . . . . . . . . . . . . . . . . . .    1,074,428      827,965                --    1,005,726      793,989
- - ---------------------------------------------------------------------------------------------------------------------------------
   End of Period  . . . . . . . . . . . . . . . . . . . . .  $   929,019   $1,074,428          $ 56,869   $1,125,614   $1,005,726
=================================================================================================================================
   (1)   Distributions Per Share
         Net Investment Income  . . . . . . . . . . . . . .        $.299        $.604             $.101        $.011        $.024
         Realized Net Gain  . . . . . . . . . . . . . . . .        $.152        $.199                --           --           --
- - ---------------------------------------------------------------------------------------------------------------------------------
   (2)   Shares Issued and Redeemed
         Issued . . . . . . . . . . . . . . . . . . . . . .       12,137       40,203             6,239      671,767    1,091,301
         Issued in Lieu of Cash Distributions . . . . . . .        2,804        4,663                26       11,418       19,557
         Redeemed . . . . . . . . . . . . . . . . . . . . .      (22,899)     (25,866)             (600)    (563,275)    (899,135)
- - ---------------------------------------------------------------------------------------------------------------------------------
                                                                  (7,958)      19,000             5,665      119,910      211,723
- - ---------------------------------------------------------------------------------------------------------------------------------
</TABLE>





                                       15
<PAGE>   16
FINANCIAL HIGHLIGHTS


<TABLE>
<CAPTION>
                                                                    INSURED LONG-TERM PORTFOLIO
- - -------------------------------------------------------------------------------------------------------------------
                                                SIX MONTHS ENDED                  Year Ended November 30,
                                                                       --------------------------------------------
For a Share Outstanding Throughout Each Period      MAY 31, 1994       1993      1992      1991      1990      1989
- - -------------------------------------------------------------------------------------------------------------------
<S>                                                       <C>        <C>     <C>         <C>       <C>      <C>
NET ASSET VALUE, BEGINNING OF PERIOD  . . . . . . .       $11.30     $10.89    $10.43    $10.22    $10.19     $9.71
                                                          ------     ------  --------    ------    ------   -------
INVESTMENT OPERATIONS
  Net Investment Income . . . . . . . . . . . . . .         .299       .604      .633      .644      .660      .671
  Net Realized and Unrealized Gain (Loss)
    on Investments  . . . . . . . . . . . . . . . .        (.488)      .609      .464      .210      .030      .480
  TOTAL FROM INVESTMENT OPERATIONS  . . . . . . . .        (.189)     1.213     1.097      .854      .690     1.151
- - -------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income  . . . . . .        (.299)     (.604)    (.633)    (.644)    (.660)    (.671)
  Distributions from Realized Capital Gains . . . .        (.152)     (.199)    (.004)       --        --        --
                                                          ------     ------  --------    ------    ------   -------
      TOTAL DISTRIBUTIONS   . . . . . . . . . . . .        (.451)     (.803)    (.637)    (.644)    (.660)    (.671)
- - -------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . . . .       $10.66     $11.30    $10.89    $10.43    $10.22    $10.19
===================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . . . .       -1.77%    +11.53%   +10.81%    +8.61%    +7.06%   +12.16%
- - -------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- - ------------------------
Net Assets, End of Period (Millions)  . . . . . . .         $929     $1,074      $828      $629      $385      $260
Ratio of Expenses to Average Net Assets . . . . . .        .20%*       .19%      .24%     .25%+     .26%+     .24%+
Ratio of Net Investment Income to
  Average Net Assets  . . . . . . . . . . . . . . .       5.43%*      5.38%     5.92%     6.24%     6.57%     6.67%
Portfolio Turnover Rate . . . . . . . . . . . . . .         14%*        27%       54%       19%        6%        3%
- - -------------------------------------------------------------------------------------------------------------------
</TABLE>

+Insurance expenses represent .01%, .01%, and .02%.
*Annualized.




<TABLE>
<CAPTION>
                                                                               INSURED INTERMEDIATE-TERM PORTFOLIO
- - -------------------------------------------------------------------------------------------------------------------
                                                                                                         MARCH 4 TO
For a Share Outstanding Throughout Each Period                                                         MAY 31, 1994
- - -------------------------------------------------------------------------------------------------------------------
<S>                                                                                                          <C>
NET ASSET VALUE, BEGINNING OF PERIOD  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      $10.00
                                                                                                             ------
INVESTMENT OPERATIONS
  Net Investment Income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .        .101
  Net Realized and Unrealized Gain (Loss) on Investments  . . . . . . . . . . . . . . . . . . . . . . .        .040
                                                                                                             ------
      TOTAL FROM INVESTMENT OPERATIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .        .141
- - -------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .       (.101)
  Distributions from Realized Capital Gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          --
                                                                                                             ------
      TOTAL DISTRIBUTIONS   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .       (.101)
- - -------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      $10.04
===================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      +1.42%
- - -------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- - ------------------------
Net Assets, End of Period (Millions)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         $57
Ratio of Expenses to Average Net Assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .       .20%*
Ratio of Net Investment Income to Average Net Assets  . . . . . . . . . . . . . . . . . . . . . . . . .      4.55%*
Portfolio Turnover Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          0%
- - -------------------------------------------------------------------------------------------------------------------
</TABLE>
*Annualized.





                                       16
<PAGE>   17
<TABLE>
<CAPTION>
                                                                 MONEY MARKET PORTFOLIO
- - -------------------------------------------------------------------------------------------------------------------
                                                SIX MONTHS ENDED                  Year Ended November 30,
                                                                       --------------------------------------------
For a Share Outstanding Throughout Each Period      MAY 31, 1994       1993      1992      1991      1990      1989
- - -------------------------------------------------------------------------------------------------------------------
<S>                                                       <C>        <C>       <C>       <C>       <C>       <C>
NET ASSET VALUE, BEGINNING OF PERIOD  . . . . . .          $1.00      $1.00     $1.00     $1.00     $1.00     $1.00
                                                          ------     ------    ------    ------    ------    ------
INVESTMENT OPERATIONS
  Net Investment Income . . . . . . . . . . . . .           .011       .024      .029      .043      .054      .060
  Net Realized and Unrealized Gain (Loss)
    on Investments  . . . . . . . . . . . . . . .             --         --        --        --        --        --
                                                          ------     ------    ------    ------    ------    ------
        TOTAL FROM INVESTMENT OPERATIONS  . . . .           .011       .024      .029      .043      .054      .060
- - -------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income  . . . . .          (.011)     (.024)    (.029)    (.043)    (.054)    (.060)
  Distributions from Realized Capital Gains . . .             --         --        --        --        --        --
                                                          ------     ------    ------    ------    ------    ------
        TOTAL DISTRIBUTIONS   . . . . . . . . . .          (.011)     (.024)    (.029)    (.043)    (.054)    (.060)
- - -------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . . .          $1.00      $1.00     $1.00     $1.00     $1.00     $1.00
===================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . . .         +1.14%     +2.40%    +2.97%    +4.44%    +5.59%    +6.19%
- - -------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- - ------------------------
Net Assets, End of Period (Millions)  . . . . . .         $1,126     $1,006      $794      $759      $723      $540
Ratio of Expenses to Average Net Assets . . . . .          .20%*       .19%      .24%      .24%      .25%      .22%
Ratio of Net Investment Income to
  Average Net Assets  . . . . . . . . . . . . . .         2.29%*      2.37%     2.92%     4.32%     5.43%     5.99%
Portfolio Turnover Rate . . . . . . . . . . . . .            N/A        N/A       N/A       N/A       N/A       N/A
- - -------------------------------------------------------------------------------------------------------------------
</TABLE>

*Annualized.





                                       17
<PAGE>   18
NOTES TO FINANCIAL STATEMENTS

Vanguard California Tax-Free Fund is registered under the Investment Company
Act of 1940 as an open-end investment company and consists of the Insured
Long-Term, Insured Intermediate-Term and Money Market Portfolios. Each
Portfolio invests in debt instruments of municipal issuers whose ability to
meet their obligations may be affected by economic and political developments
in the State of California.

* A.     The following significant accounting policies are in conformity with
generally accepted accounting principles for investment companies. Such
policies are consistently followed by the Fund in the preparation of financial
statements.

1.       SECURITY VALUATION: Money Market Portfolio: investment securities are
         stated at amortized cost which approximates market value. Other
         Portfolios: municipal bonds are valued utilizing primarily the latest
         bid prices or, if bid prices are not available, on the basis of
         valuations based on a matrix system (which considers such factors as
         security prices, yields, maturities and ratings), both as furnished by
         an independent pricing service.

2.       FEDERAL INCOME TAXES: Each Portfolio of the Fund intends to continue
         to qualify as a regulated investment company and distribute all of its
         income. Accordingly, no provision for Federal income taxes is required
         in the financial statements.

3.       FUTURES: The Insured Long-Term and Insured Intermediate-Term
         Portfolios utilize futures contracts to a limited extent. The primary
         risks associated with the use of futures contracts are imperfect
         correlation between the change in market value of the bonds held by
         the Portfolios and the prices of futures contracts, and the
         possibility of an illiquid market. Futures contracts are valued based
         upon their quoted daily settlement prices. Fluctuations in the value
         of futures contracts are recorded as unrealized appreciation
         (depreciation) until terminated at which time realized gains (losses)
         are recognized.

         Unrealized appreciation (depreciation) related to open futures
         contracts is required to be treated as realized gain (loss) for
         Federal income tax purposes.

4.       DISTRIBUTIONS: Distributions from net investment income are declared
         on a daily basis payable on the first business day of the following
         month. Annual distributions from realized gains, if any, are recorded
         on the ex-dividend date. Capital gain distributions are determined on
         a tax basis and may differ from realized capital gains for financial
         reporting purposes due to differences in the timing of realization of
         gains.

5.       OTHER: Security transactions are accounted for on the date the
         securities are purchased or sold. Costs used in determining realized
         gains and losses on the sale of investment securities are those of
         specific securities sold. Premiums and original issue discounts are
         amortized and accreted, respectively, to interest income over the
         lives of the respective securities.

* B.     The Vanguard Group, Inc. furnishes at cost investment advisory,
corporate management, administrative, marketing, and distribution services. The
costs of such services are allocated to the Fund under methods approved by the
Board of Trustees. The Fund has contributed capital aggregating $337,000 to
Vanguard (included in Other Assets), representing 1.7% of Vanguard's
capitalization. The Fund's officers and trustees are also officers and
directors of Vanguard.

* C.     During the period ended May 31, 1994, purchases and sales of
investment securities other than temporary cash investments were:
<TABLE>
<CAPTION>
- - -----------------------------------------------------------------------------------------------------
                                                                                     (000)
                                                                        -----------------------------
Portfolio                                                               Purchases               Sales
- - -----------------------------------------------------------------------------------------------------
<S>                                                                       <C>                <C>
INSURED LONG-TERM                                                         $67,752            $155,082
INSURED INTERMEDIATE-TERM                                                  49,544                  --
- - -----------------------------------------------------------------------------------------------------
</TABLE>





                                       18
<PAGE>   19
* D.     At May 31, 1994, unrealized appreciation of investment securities for
financial reporting and Federal income tax purposes was:
<TABLE>
<CAPTION>
- - -------------------------------------------------------------------------------------------------------
                                                                           (000)
                                                   ----------------------------------------------------
                                                   Appreciated          Depreciated      Net Unrealized
Portfolio                                          Securities           Securities        Appreciation
- - -------------------------------------------------------------------------------------------------------
<S>                                                  <C>                 <C>                  <C>
INSURED LONG-TERM                                    $23,315             $(16,344)            $6,971
INSURED INTERMEDIATE-TERM                                498                 (130)               368
- - -------------------------------------------------------------------------------------------------------
</TABLE>

At May 31, 1994, the aggregate settlement value and unrealized appreciation of
long positions in Municipal Bond Index futures contracts expiring in June 1994,
and short positions in U.S. Treasury Bond futures contracts expiring through
September, 1994, were:

<TABLE>
<CAPTION>
- - ------------------------------------------------------------------------------------------------------
                                                                                    (000)
                                                                        Aggregate          Unrealized
                                                                     ---------------------------------
Portfolio                                                            Settlement Value     Appreciation
- - ------------------------------------------------------------------------------------------------------
<S>                                                                     <C>                   <C>
INSURED LONG-TERM
 LONG POSITIONS                                                         $  30,174             $   579
 SHORT POSITIONS                                                          128,012               3,717
INSURED INTERMEDIATE-TERM
 SHORT POSITIONS                                                            3,515                  28
- - ------------------------------------------------------------------------------------------------------
</TABLE>

The market values of securities deposited as initial margin for open futures
contracts by the Insured Long-Term and Insured Intermediate-Term Portfolios
were $3,037,000 and $107,000, respectively.





                                       19
<PAGE>   20

                          THE VANGUARD FAMILY OF FUNDS
                               MONEY MARKET FUNDS
                         Vanguard Money Market Reserves

                         TAX-EXEMPT MONEY MARKET FUNDS
              Vanguard Municipal Bond Fund-Money Market Portfolio
                 Vanguard State Tax-Free Funds (CA, NJ, OH, PA)

                            TAX-EXEMPT INCOME FUNDS
                          Vanguard Municipal Bond Fund
             Vanguard State Tax-Free Funds (CA, FL, NJ, NY, OH, PA)

                               FIXED INCOME FUNDS
                             Vanguard Admiral Funds
                            Vanguard Bond Index Fund
                     Vanguard Fixed Income Securities Fund
                         Vanguard Preferred Stock Fund

                                 BALANCED FUNDS
                         Vanguard Asset Allocation Fund
                          Vanguard Balanced Index Fund
                               Vanguard STAR Fund
                         Vanguard/Wellesley Income Fund
                            Vanguard/Wellington Fund

                                  EQUITY FUNDS
                            GROWTH AND INCOME FUNDS
                      Vanguard Convertible Securities Fund
                          Vanguard Equity Income Fund
                              Vanguard Index Trust
                        Vanguard Quantitative Portfolios
                 Vanguard/Trustees' Equity Fund-U.S. Portfolio
                             Vanguard/Windsor Fund
                              Vanguard/Windsor II

                                  GROWTH FUNDS
                          Vanguard/Morgan Growth Fund
                             Vanguard/PRIMECAP Fund
                         Vanguard U.S. Growth Portfolio

                            AGGRESSIVE GROWTH FUNDS
                             Vanguard Explorer Fund
                        Vanguard Specialized Portfolios

                              INTERNATIONAL FUNDS
                    Vanguard International Equity Index Fund
                    Vanguard International Growth Portfolio
             Vanguard/Trustees' Equity Fund-International Portfolio


                 The Vanguard Group * Vanguard Financial Center
                             Valley Forge, PA 19482
                   New Account Information: 1-(800) 662-7447
                 Shareholder Account Services: 1-(800) 662-2739

               This Report has been prepared for shareholders and
                may be distributed to others only if preceded or
             accompanied by a current prospectus. All Funds in the
                Vanguard Family are offered by prospectus only.

                                   Q752-05/94

                                    VANGUARD
                                   CALIFORNIA
                                 TAX-FREE FUND

                         [PHOTO -- SEE EDGAR APPENDIX]


                               SEMI-ANNUAL REPORT
                                  MAY 31, 1994
<PAGE>   21
                                 EDGAR APPENDIX

         The back cover of the printed version of this report features the
flags of the United States of America and Vanguard flying from a halyard.



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