VANGUARD CALIFORNIA TAX FREE FUND
N-30D, 1996-07-25
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<PAGE>   1
                           A MESSAGE TO SHAREHOLDERS

DEAR SHAREHOLDER:

The declining interest rate environment that prevailed for most of fiscal 1995
reversed course during the first six months of our current fiscal year.
Short-term tax-exempt yields, after falling through late February, stabilized
and then abruptly rose to end the six-month period slightly higher than where
they began. Long-term tax-exempt yields also moved lower at the outset of the
period, before creeping higher to end above their starting point. This overall
increase in interest rates resulted in lower prices for municipal bonds.

         During the past twelve months, the net asset values of our Insured
Longer-Term Portfolios were negatively impacted by rising rates, but each
Portfolio's income component more than compensated for any decrease in
principal. Our Money Market Portfolios all gave good accounts of themselves,
providing returns that fully reflect the current level of interest rates. The
table at the bottom of page 3 of this Report provides detailed results for each
of our State Tax-Free Portfolios, including per share net asset values,
dividend and capital gains distributions, and total returns over the past six
and twelve months, as well as current yields. In summary form, here are the
Portfolio highlights:

THE STATE MONEY MARKET PORTFOLIOS--provided total returns ranging from +3.4% to
+3.6% for the past year. As expected, net asset values remained at $1.00 per
share. As the following table illustrates, current yields are in the area of
3.4%, moderately lower than they were twelve months ago:

<TABLE>
<CAPTION>
- -------------------------------------------------------
                                     SEVEN-DAY
                                 ANNUALIZED YIELD      
                           ----------------------------
MONEY MARKET               MAY 31,   NOV. 30,   MAY 31,
PORTFOLIO                   1996       1995      1995  
- -------------------------------------------------------
<S>                          <C>       <C>       <C>
CALIFORNIA                   3.39%     3.61%     3.80%
PENNSYLVANIA                 3.44      3.64      3.80
NEW JERSEY                   3.30      3.57      3.71
OHIO                         3.43      3.71      3.92  
- -------------------------------------------------------
</TABLE>

THE STATE INSURED LONGER-TERM PORTFOLIOS--earned sufficient income to offset
the modest decrease in long-term municipal bond prices, providing total returns
(capital change plus reinvested dividends) ranging from +3.4% to +5.0% for the
twelve months. Despite the swings in interest rates during the period, the
current yields on the Insured Longer-Term Portfolios (roughly 5.2%) are nearly
identical to their levels of twelve months ago.

To provide some perspective on how our Insured Longer-Term Portfolios performed
during the past year, the table below breaks out the two components of total
return--income return and capital return. As you can see, the positive
contribution of each Portfolio's income return was marginally reduced by its
negative capital return.

<TABLE>
<CAPTION>
- -------------------------------------------------------
                                INVESTMENT RETURNS     
                           ----------------------------
                                TWELVE MONTHS ENDED
                                   MAY 31, 1996        
                           ----------------------------
INSURED LONGER-TERM
PORTFOLIO                  INCOME     CAPITAL    TOTAL 
- -------------------------------------------------------
<S>                         <C>       <C>       <C>
CALIFORNIA
 INTERMEDIATE-TERM          +5.1%     -0.1%     +5.0%
CALIFORNIA LONG-TERM        +5.5      -1.7      +3.8
NEW YORK                    +5.4      -1.6      +3.8
PENNSYLVANIA                +5.6      -1.3      +4.3
NEW JERSEY                  +5.3      -1.9      +3.4
OHIO                        +5.4      -1.6      +3.8
FLORIDA                     +5.2      -1.4      +3.8   
- -------------------------------------------------------
</TABLE>

FIXED-INCOME MARKET REVIEW

Although the Federal Reserve lowered short-term interest rates in December and
January, the bond market fretted over the apparent strength of the U.S. economy
and the possibility of an increase in inflation. During the past six months,
the yield on the long-term U.S. Treasury bond, the benchmark for the bond
market, rose from 6.1% to 6.9%, engendering a price decline of approximately
- -10% (excluding interest income).

         The long-term municipal bond market fared much better. On balance for
the six-month period, yields on high-grade municipal bonds increased less
dramatically (5.5% to 5.9%), resulting in a price


                                      1
<PAGE>   2
decline of only -6%. Yields on top-grade (MIG 1) municipal notes remained
essentially unchanged on balance at 3.7%.

         Although the future direction of interest rate movements is virtually
impossible to predict with any level of accuracy and consistency, the relative
performance of bond funds with comparable quality and maturity guidelines is
surprisingly predictable.  That is to say, bond funds holding similar types of
securities--say, high-quality, long-term municipal bonds--should, on average,
earn roughly equivalent gross returns. What that absolute return will be,
however, is anyone's guess. On the other hand, what can be predicted with some
semblance of accuracy is the relative performance differential due to the
expense ratios of the funds. The average Vanguard Insured Longer-Term
Portfolio, for example, operates with an annual expense ratio of 0.2%, compared
to 0.9% for our average competitor. Therefore, holding all other factors equal,
a typical Vanguard Insured Longer-Term Portfolio begins with an annual income
advantage of +0.7% over a comparable municipal bond fund.

IN SUMMARY

As you may know, one of the benefits of Vanguard's Insured Longer-Term
Portfolios is their municipal bond insurance, which guarantees the timely
payment of principal and interest. These insurance provisions provide
protection against deteriorating creditworthiness within the various
municipalities and add an important level of enhanced safety.

         There are, of course, "costs" associated with insuring our Portfolios
against potential default. First, bonds that are issued with insurance
typically offer slightly lower yields than non-insured bonds. A second cost is
the explicit expense of purchasing insurance on non-insured bonds. Despite
these costs, however, our top-quality Portfolios continue to benefit from our
expense ratio advantage and provide yields that are fully competitive with
those of uninsured municipal bond portfolios.

         Over time, given our high-quality, low-cost advantage, Vanguard State
Tax-Free Portfolios should remain attractive relative to our competitors'
funds. We look forward to reporting to you in further detail in our 1996 Annual
Report six months hence.

Sincerely,


/s/ John C. Bogle
- -----------------
John C. Bogle
Chairman of the Board


/s/ John J. Brennan
- -------------------
John J. Brennan
President

June 8, 1996

Note: Mutual fund data from Lipper Analytical Services, Inc.





                                       2
<PAGE>   3
                          AVERAGE ANNUAL TOTAL RETURNS

THE CURRENT YIELDS QUOTED IN THE MESSAGE TO SHAREHOLDERS ARE CALCULATED IN
ACCORDANCE WITH SEC GUIDELINES. THE AVERAGE ANNUAL TOTAL RETURNS FOR THE
PORTFOLIOS (PERIODS ENDED MARCH 31, 1996) ARE AS FOLLOWS:


<TABLE>
<CAPTION>
                                                                                               SINCE INCEPTION      
                                                                                       --------------------------------
                                          INCEPTION                                    TOTAL        INCOME      CAPITAL
                                            DATE            1 YEAR       5 YEARS       RETURN       RETURN       RETURN
                                          ---------         ------       -------       ------       ------       ------
<S>                                        <C>               <C>          <C>           <C>          <C>          <C>
CALIFORNIA INSURED INTERMEDIATE-TERM        3/4/94           +7.60%       --            +6.56%       +5.08%       +1.48%
CALIFORNIA INSURED LONG-TERM                4/7/86           +7.73        +8.17%        +7.75        +6.47        +1.28
CALIFORNIA MONEY MARKET                     6/1/87           +3.57        +3.12         +4.11        +4.11         0.00
NEW YORK INYRED TAY  YREE                   4/7/86           +7.50        +8.37         +7.32        +6.44        +0.88
PENNSYLVANIA INSURED LONG-TERM              4/7/86           +7.15        +8.41         +7.95        +6.64        +1.31
PENNSYLVANIA MONEY MARKET                  6/13/88           +3.62        +3.12         +4.11        +4.11         0.00
NEW JERSEY INSURED LONG-TERM                2/3/88           +7.13        +8.10         +8.39        +6.43        +1.96
NEW JERSEY MONEY MARKET                     2/3/88           +3.50        +3.08         +4.09        +4.09         0.00
OHIO INSURED LONG-TERM                     6/18/90           +7.13        +8.08         +8.50        +5.97        +2.53
OHIO MONEY MARKET                          6/18/90           +3.72        +3.17         +3.49        +3.49         0.00
FLORIDA INSURED TAX-FREE                    9/1/92           +7.50        --            +7.62        +5.43        +2.19
</TABLE>

ALL OF THESE DATA REPRESENT PAST PERFORMANCE. THE INVESTMENT RETURN AND
PRINCIPAL VALUE OF AN INVESTMENT WILL FLUCTUATE SO THAT INVESTORS' 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 THE MONEY MARKET
PORTFOLIOS OF 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.

<TABLE>
<CAPTION>
                                                            NET ASSET VALUE            INCOME
                           TOTAL                               PER SHARE              DIVIDENDS            TOTAL RETURN
                      NET ASSETS                           ------------------     ----------------       ----------------
                      (MILLIONS)      AVERAGE  AVERAGE     NOV. 30,   MAY 31,      SIX      TWELVE        SIX      TWELVE   CURRENT
PORTFOLIO           MAY 31, 1996     MATURITY QUALITY*       1995       1996      MONTHS    MONTHS       MONTHS    MONTHS   YIELD**
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>           <C>       <C>        <C>          <C>       <C>         <C>       <C>         <C>
MONEY MARKET                      
 CALIFORNIA   . . . . .   $1,276      42 DAYS    MIG 1     $ 1.00     $ 1.00       $.017     $.034        +1.7%     +3.5%      3.39%
 PENNSYLVANIA   . . . .    1,306      32 DAYS    MIG 1       1.00       1.00        .017      .035        +1.7      +3.5       3.44
 NEW JERSEY   . . . . .      888      57 DAYS    MIG 1       1.00       1.00        .016      .033        +1.6      +3.4       3.30
 OHIO   . . . . . . . .      199      60 DAYS    MIG 1       1.00       1.00        .017      .035        +1.7      +3.6       3.43
- -----------------------------------------------------------------------------------------------------------------------------------
INSURED INTERMEDIATE-TERM         
 CALIFORNIA   . . . . .   $  264    7.4 YEARS      Aaa     $10.44     $10.25       $.254     $.512        +0.6%     +5.0%      4.77%
INSURED LONG-TERM                 
 CALIFORNIA   . . . . .      978   14.1 YEARS      Aaa      11.27      10.87        .299      .600        -0.9      +3.8       5.33
 NEW YORK   . . . . . .      879   11.7 YEARS      Aaa      11.01      10.57        .286      .574        -0.8+     +3.8+      5.23
 PENNSYLVANIA   . . . .    1,565   11.4 YEARS      Aaa      11.28      10.90        .304      .608        -0.4+     +4.3+      5.28
 NEW JERSEY   . . . . .      796   11.9 YEARS      Aaa      11.78      11.29        .310      .617        -1.1+     +3.4+      5.23
 OHIO   . . . . . . . .      203   10.9 YEARS      Aaa      11.63      11.25        .302      .605        -0.7      +3.8       5.29
 FLORIDA  . . . . . . .      453   14.2 YEARS      Aaa      10.94      10.60        .275      .554        -0.6      +3.8       5.22
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

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

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

 +Includes capital gains distributions of $.065 for New York, $.037 for
  Pennsylvania, and $.058 for New Jersey.

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





                                       3
<PAGE>   4
                       REPORT FROM THE INVESTMENT ADVISER

The two major factors affecting the Longer-Term Insured Portfolios over the
last six months were the sharp rise in interest rates and the relatively better
performance of municipal bonds versus their taxable counterparts. The yield on
the 30-year U.S. Treasury bond increased 0.8 percentage points (from 6.1% to
6.9%). This was a decidedly unpleasant turn of events for bondholders and their
total returns. The increase in interest rates was prompted by signs of an
improving economy and investor concerns about inflation.  During the same
period, the yield on high-grade, long-term municipal bonds rose 0.4 percentage
points (from 5.5% to 5.9%). The question of tax reform first raised by Senator
Armey (R-TX) and later championed by Steve Forbes in the Republican
Presidential primaries seemed to have been, at least in part, answered. The
reduced intensity of the rhetoric around the question of tax reform was a
contributing factor in explaining why the municipal market performed better
than the Treasury market.

         The Federal Reserve Board's last action on January 31, 1996, was to
reduce the Federal funds rate and the discount rate by 0.25 percentage points.
At that time, the economy appeared to be struggling, a situation further
exacerbated by the severity of the winter. Unfortunately for bond investors,
the release of February's economic statistics showed a much stronger than
anticipated economy. Concurrently, an increase in the prices of oil, gasoline,
wheat, and corn prodded some investors to become concerned about the specter of
higher inflation. The combined effects caused the yield on the 30-year U.S.
Treasury bond to increase sharply. The beginning of the Presidential primary
season added an extra degree of uncertainty to the market.

         While bear markets are never pleasant, they often offer investment
opportunities that can be exploited to the shareholders' eventual benefit.
First, the Portfolios' dividend distribution can be positively impacted by
swapping bonds with lower yields to maturity for bonds with higher yields to
maturity. Second, capital gains distributions can usually be reduced by
realizing offsetting capital losses. Finally, bear markets are generally the
best time to buy bonds that have superior protection from early redemption. As
interest rates rise, bonds which are noncallable or have long periods before
they are callable are often available at close to the same price as bonds with
less desirable characteristics. When the time comes for interest rates to
reverse course and fall, these bonds will furnish excellent capital returns
while providing a more stable dividend.

         The past six months have been a very volatile period of time. The
future remains unknown, but the State Insured Longer-Term Portfolios will
continue to focus on their objectives. It is through this commitment to
high-quality Federal and state tax-exempt municipal bonds and low-cost, prudent
management that superior and durable investment results can be achieved.

MONEY MARKETS

The volatility experienced in the Treasury market over the past six months has
had little impact on yields in the short-term municipal bond market. Yields on
one-year municipal notes ended the period very close to where they began,
despite a 0.3% rise in yields on one-year Treasury bills. Nevertheless, there
were two issues which had a substantial impact on the short-term market.
First, seasonal supply constraints that typically plague the short-term
municipal market in the spring dampened the average weighted maturities of
money market funds. Second, and most notably, the Securities and Exchange
Commission (SEC) announced changes in the regulations governing money market
funds which became effective June 3, 1996.

         In April, the SEC adopted amendments to rule 2a-7 under the Investment
Company Act of 1940. Section 2a-7 contains regulations that protect the quality
and safety of money market funds. For the most part, the changes emphasize
higher quality and increased diversification. The new guidelines were designed
to tighten the regulations imposed on tax-exempt money market funds and improve
the likelihood that the funds maintain a stable net asset value. Compliance
with the amendments may prove challenging for the industry. Many of our
competitors operate under somewhat lower quality standards and, as a result,
may be forced to significantly restructure their funds in order to meet the
standards. In contrast, our Money Market Portfolios have





                                       4
<PAGE>   5
always been managed quite conservatively with credit quality our most important
consideration. Consequently, we expect the impact of the changes on Vanguard's
State Tax-Free Money Market Portfolios to be minimal.

         The scarcity of new issue supply in the short-term municipal market
contributed to the relative stability in yields over the period. The supply of
short-term municipals tends to be quite seasonal, the timing of which depends
upon an issuer's fiscal year. The vast majority of issuers have fiscal years
beginning July 1 and ending June 30, causing new issue supply to decline in the
months leading up to June and increase dramatically in July. Looking forward,
the glut of new issue supply should provide ample opportunities for us to
extend our average maturities, increase our diversification, and further
enhance our overall quality.

         In conclusion, the months ahead should be challenging for the
industry, with tighter regulations governing tax-free money market funds coming
at a time when short-term issuance is at its peak. Hopefully, the new
amendments adopted by the SEC will "level the playing field," bringing
competitors closer to Vanguard's already conservative style of management,
thereby further enhancing the performance advantage that arises from our "rock
bottom" expense ratios.

Sincerely,

Ian A. MacKinnon           David E. Hamlin
Senior Vice President      Principal

Pamela W. Tynan            Danine A. Mueller
Principal                  Principal

Reid O. Smith              Jerome J. Jacobs
Principal                  Principal

Vanguard Fixed Income Group

June 18, 1996





                                       5
<PAGE>   6
                            STATEMENT OF NET ASSETS


                                                FINANCIAL STATEMENTS (unaudited)
                                                                    May 31, 1996


<TABLE>
<CAPTION>
                                                             Face         Market
INSURED                                                    Amount          Value
LONG-TERM PORTFOLIO                                         (000)         (000)+
- --------------------------------------------------------------------------------
<S>                                                      <C>           <C>
MUNICIPAL BONDS (98.4%)                                                         
- --------------------------------------------------------------------------------
ISSUER INSURED (87.0%)
  Anaheim CA Convention Center COP
    0.00%, 8/1/04 (1)                                    $  3,120      $   2,051
    0.00%, 8/1/05 (1)                                       1,250            774
    0.00%, 8/1/06 (1)                                       3,125          1,798
    5.50%, 8/1/14 (1)                                       5,750          5,410
  Anaheim CA Public Improvement
    Corp. Lease COP VRDO
    (Refunding Projects)
    3.30%, 6/5/96 (2)                                       3,430          3,430
  City of Barstow CA
    Redevelopment Agency
    6.25%, 9/1/22 (1)                                       2,225          2,268
  California Dept. of Water Resources
    4.75%, 12/1/29 (1)                                     22,040         17,814
  California GO
    6.00%, 8/1/19 (3)                                       4,400          4,351
    7.00%, 11/1/04 (3)(Prere.)                              1,935          2,234
    7.00%, 11/1/13 (3)                                         65             71
  California Health Facilities Auth.
    (Adventist Health System)
    6.75%, 3/1/11 (1)                                       5,000          5,352
    (Catholic Health Care West)
    VRDO 3.40%, 6/5/96 (1)                                  7,700          7,700
    5.75%, 7/1/15 (2)                                       4,080          3,969
    6.00%, 7/1/17 (1)                                      21,000         20,850
    (Centinela Hosp.)
    6.25%, 9/1/15 (1)                                      22,400         23,214
    (Mills Peninsula)
    5.75%, 1/15/15 (7)                                     12,500         12,056
    (San Diego Hosp.)
    6.20%, 8/1/20 (1)                                       3,820          3,854
    6.625%, 5/1/19 (1)                                      6,525          6,781
    (Unihealth America)
    7.625%, 10/1/15 (2)                                        50             54
  California Housing Finance Agency
    Multifamily Housing Rev.
    8.625%, 8/1/15 (1)                                        170            176
  California Schools Cash
    Reserve Program
    4.75%, 7/3/96 (1) LOC                                  10,000         10,007
  California Public Works Board
    (Univ. of California)
    6.25%, 12/1/07 (2)                                      6,945          7,406
    6.50%, 12/1/08 (2)                                      4,000          4,392
  California Public Works Lease Rev.
    (Dept. of Corrections)
    5.50%, 12/1/12 (1)                                      2,000          1,956
  Chino CA Basin Finance Auth.
    Municipal Water Dist.
    6.00%, 8/1/16 (2)                                       5,500          5,436
  Contra Costa CA COP
    5.50%, 6/1/12 (2)                                       6,850          6,700
    6.70%, 2/1/21 (2)                                       4,630          4,849
  Culver City CA Redevelopment
    Finance Auth.
    6.75%, 11/1/99 (2) (Prere.)                               955          1,012
  East Bay CA Municipal Utility
    Dist. Waste Water Treatment
    System Rev.
    6.375%, 6/1/12 (2)                                      2,000          2,194
    6.375%, 6/1/21 (2)                                      5,750          6,307
    6.50%, 6/1/20 (2)                                       2,000          2,231
  Eastern CA Municipal Water Dist.
    6.75%, 7/1/12 (3)                                       8,500          9,469
  Elsinore Valley CA Municipal
    Water Dist. COP
    5.90%, 7/1/06 (3)                                       1,685          1,778
    6.00%, 7/1/12 (3)                                       2,210          2,277
  Encina CA Power Auth. Waste
    Water Rev.
    6.875%, 8/1/11 (3)                                      3,650          3,886
  Glendale CA Hosp. Rev.
    (Adventist Health System)
    6.00%, 3/1/14 (1)                                       3,000          2,993
  Indian Wells CA
    Redevelopment Agency
    5.50%, 12/1/22 (1)                                      2,000          1,856
  Kern CA High School Dist. GO
    6.25%, 8/1/11 (1)                                       1,065          1,138
    6.40%, 8/1/14 (1)                                       1,490          1,609
    6.40%, 8/1/15 (1)                                       1,645          1,780
    6.40%, 8/1/16 (1)                                       1,815          1,968
  LaQuinta CA Redevelopment Agency
    (Tax Allocation Project)
    7.30%, 9/1/10 (1)                                       1,145          1,337
  Long Beach CA Financing
    Auth. Rev.
    6.00%, 11/1/17 (2)                                      2,000          2,039
  Los Angeles CA Development Auth.
    Rev. COP
    (Children's Hosp.)
    6.00%, 6/1/10 (1)                                       1,000          1,033
    6.00%, 6/1/11 (1)                                       2,365          2,433
  Los Angeles CA Metropolitan
    Transportation Auth. VRDO
    3.35%, 6/6/96 (1)                                         600            600
  Los Angeles County CA
    Transportation Commission
    Sales Tax Rev. Refunding VRDO
    3.30%, 6/5/96 (3)                                       1,800          1,800
  Los Angeles CA Water Dept.
    5.70%, 6/1/13 (1)                                       5,000          4,968
</TABLE>




                                      6
<PAGE>   7
<TABLE>
<CAPTION>
                                                             Face         Market
                                                           Amount          Value
                                                            (000)         (000)+
- --------------------------------------------------------------------------------
  <S>                                                    <C>           <C>
  MSR CA Public Power Agency
    (San Juan Project)
    6.125%, 7/1/13 (2)                                   $  8,000      $   8,359
    6.625%, 7/1/13 (6)                                      2,000          2,061
    6.75%, 7/1/20 (1)                                      38,785         42,727
  Modesto CA Irrigation Dist.
    Finance Auth. Rev.
    (Woodland Project)
    6.50%, 10/1/11 (2)                                      8,125          8,861
    6.50%, 10/1/22 (2)                                      9,750         10,458
  Mountain View CA Capital
    Improvement Finance
    Auth. Rev.
    6.25%, 8/1/12 (1)                                       5,000          5,121
  North City West CA
    School Facilities Financing Auth.
    6.00%, 9/1/19 (5)                                       2,000          1,975
  Northern California Power Agency
    (Hydro Electric Project)
    5.50%, 7/1/23 (1)                                       5,000          4,636
    6.00%, 7/1/09 (1)                                       7,530          7,885
    6.30%, 7/1/18 (1)                                      10,000         10,477
    7.50%, 7/1/21 (2) (Prere.)                              1,810          2,114
  Oakland CA Redevelopment Agency
    (Central Dist. Project)
    5.50%, 2/1/14 (2)                                       5,500          5,348
  Orange County CA Local
    Transportation Auth.
    5.80%, 2/15/05 (3)                                      6,000          6,219
    5.90%, 2/15/06 (3)                                      8,000          8,309
  Orange County CA Sanitation
    Dist. VRDO
    3.35%, 6/6/96 (2)                                       9,200          9,200
    3.50%, 6/4/96 (2) LOC                                   4,800          4,800
    3.60%, 6/4/96 (3)                                       3,000          3,000
  Oro Loma CA Sanitation Dist.
    5.20%, 10/1/16 (2)                                      4,800          4,362
  Pittsburg CA Redevelopment Agency
    5.50%, 8/1/07 (3)                                       2,750          2,775
    5.50%, 8/1/15 (3)                                      12,700         11,926
  Placer County CA Water Rev. COP
    7.75%, 7/1/18 (6)                                       3,500          3,820
  Pomona CA Unified School Dist. GO
    5.50%, 8/1/16 (3)                                       1,000            959
    5.60%, 8/1/14 (1)                                       1,585          1,558
    5.60%, 8/1/15 (1)                                       2,000          1,945
    5.60%, 8/1/16 (1)                                       1,000            972
    7.50%, 8/1/17 (1)                                       2,540          3,043
  Poway CA Redevelopment Agency
    7.25%, 12/15/11 (3)                                     7,500          8,190
  Rancho CA Water Dist. Finance
    Auth. Rev.
    5.875%, 11/1/10 (3)                                     3,585          3,667
    5.90%, 11/1/15 (3)                                      4,000          3,959
    6.25%, 8/1/12 (3)                                       2,000          2,070
  Redding CA Joint Power Finance
    Auth. Waste Water Rev.
    5.50%, 12/1/18 (3)                                      5,400          5,037
  Redlands CA Water COP
    7.00%, 11/1/96 (2) (Prere.)                             5,500          5,686
  Riverside County CA Public Finance
    5.25%, 9/1/04 (1)                                       2,330          2,366
    5.25%, 9/1/05 (1)                                       2,455          2,478
  Riverside County CA
    Transportation Comm.
    5.75%, 6/1/09 (2)                                       3,800          3,884
  Sacramento CA Finance Auth. Rev.
    5.375%, 11/1/14 (2)                                     4,000          3,838
    5.40%, 11/1/20 (2)                                      9,785          9,132
  Sacramento CA Municipal Utility
    Dist. Rev.
    6.25%, 8/15/10 (1)                                     33,800         36,066
    6.30%, 8/15/18 (1)                                     14,000         14,267
  Sacramento CA
    Redevelopment Agency
    (Tax Allocation Project)
    6.50%, 11/1/13 (1)                                      4,500          4,671
  San Bernardino County CA COP
    (Medical Center Financing Project)
    6.50%, 8/1/17 (1)                                      17,915         19,135
  San Diego CA Unified School
    Dist. COP
    5.00%, 8/1/07 (1)                                       4,400          4,246
    5.00%, 8/1/08 (1)                                       4,630          4,407
    5.00%, 8/1/09 (1)                                       4,875          4,583
  San Francisco CA Airport Comm.
    6.00%, 5/1/10 (1)                                       2,000          2,057
    6.00%, 5/1/11 (1)                                       2,100          2,152
    6.00%, 5/1/20 (1)                                       6,500          6,394
    6.20%, 5/1/06 (2)                                       5,000          5,331
    6.20%, 5/1/08 (2)                                       1,000          1,053
  San Francisco CA Bay Area
    Rapid Transit
    6.75%, 7/1/10 (2)                                       6,370          7,103
    6.75%, 7/1/11 (2)                                       7,455          8,312
  San Francisco CA City & County
    Airport Rev.
    6.30%, 5/1/11 (2)                                       5,000          5,166
    6.50%, 5/1/06 (1)                                       3,280          3,579
    6.60%, 5/1/07 (1)                                       2,490          2,701
    6.625%, 5/1/08 (1)                                      3,720          4,052
    6.70%, 5/1/09 (1)                                       3,970          4,303
</TABLE>





                                       7
<PAGE>   8
                      STATEMENT OF NET ASSETS (continued)

<TABLE>
<CAPTION>
                                                             Face         Market
INSURED LONG-TERM                                          Amount          Value
PORTFOLIO (continued)                                       (000)         (000)+
- --------------------------------------------------------------------------------
  <S>                                                    <C>           <C>
  San Francisco CA City & County Sewer
    6.00%, 10/1/11 (2)                                   $  2,500      $   2,559
  San Jose CA Merged Area
    Redevelopment Rev. Project
    5.00%, 8/1/20 (1)                                       4,600          4,006
    6.00%, 8/1/11 (1)                                       8,845          9,230
  San Mateo County CA Finance Auth.
    6.50%, 7/1/13 (1)                                      14,560         15,803
  San Mateo CA Sewer
    6.60%, 8/1/14 (1)                                       2,500          2,630
  Santa Ana CA Community
    Redevelopment Auth.
    7.375%, 12/1/96 (3) (Prere.)                            1,695          1,760
    7.40%, 12/1/96 (3) (Prere.)                               270            280
  Santa Ana CA Finance Auth.
    Lease Rev.
    6.25%, 7/1/16 (1)                                       5,345          5,608
    6.25%, 7/1/17 (1)                                       2,000          2,101
  Santa Clara County CA Financing
    Auth. Lease Rev.
    (Replacement Project)
    6.75%, 11/15/20 (2)                                    11,500         12,413
  Santa Clara CA
    Redevelopment Agency
    (Bayshore Project)
    7.00%, 7/1/10 (2)                                       7,000          7,960
  Santa Clara CA Valley Water
    Dist. COP
    6.00%, 2/1/24 (3)                                      20,000         19,759
  Santa Fe Springs CA
    Redevelopment Agency
    6.00%, 9/1/14 (1)                                       5,350          5,343
  Santa Margarita/Dana
    Point CA Improvement Dist.
    5.75%, 8/1/20 (1)                                      28,500         27,594
  Santa Rosa CA Waste Water Rev.
    6.00%, 7/2/15 (2)                                       7,000          7,127
    6.00%, 9/1/15 (3)                                       5,580          5,682
    6.25%, 9/1/12 (3)                                       7,075          7,722
  South Coast CA Air Quality
    Management Dist. Rev.
    5.50%, 8/1/14 (1)                                       8,000          7,569
    6.00%, 8/1/11 (2)                                       3,200          3,326
  South County CA Waste Water Auth.
    5.50%, 8/1/22 (3)                                       8,625          8,005
  South Orange County CA Public
    Finance Auth.
    7.00%, 9/1/11 (1)                                       3,000          3,417
    9.50%, 8/15/04 (1)                                      3,000          3,898
  Southern California Public
    Power Auth.
    (Palo Verde Project)
    6.60%, 7/1/08 (2)                                       4,280          4,376
    7.00%, 7/1/07 (2)                                       1,600          1,689
    7.00%, 7/1/10 (2)                                       2,500          2,638
    (Transmission Project)
    VRDO 3.30%, 6/5/96 (2)                                  5,900          5,900
  Sweetwater CA Water Rev.
    7.00%, 4/1/99 (2) (Prere.)                              3,050          3,318
  Three Valley CA Municipal
    Water Dist. COP
    5.25%, 11/1/10 (3)                                      4,220          4,027
    7.30%, 11/1/96 (1) (Prere.)                             3,200          3,344
  Tri-City CA Hosp. Dist.
    (Oceanside Hosp.)
    7.00%, 2/1/12 (1)                                       5,950          6,155
  Tulare County CA COP
    5.875%, 11/15/05 (1)                                    1,000          1,056
  Turlock CA Irrigation Dist. COP
    6.75%, 1/1/97 (3) (Prere.)                              3,020          3,164
  Ukiah CA Electric Rev.
    6.00%, 6/1/08 (1)                                       4,565          4,801
    6.25%, 6/1/18 (1)                                       6,000          6,249
  Univ. of California
    (Multiple Purpose Project)
    6.25%, 9/1/13 (1)                                      10,000         10,330
  Univ. of California
    Board of Regents
    6.00%, 9/1/08 (1)                                       2,515          2,607
    6.375%, 9/1/19 (1)                                      6,500          6,652
  Walnut CA Public Finance Auth.
    6.00%, 9/1/15 (1)                                       5,000          4,966
  Walnut Valley CA Unified
    School Dist.
    6.00%, 8/1/12 (2)                                       1,790          1,854
    6.00%, 8/1/13 (2)                                       1,980          2,042
    6.00%, 8/1/14 (2)                                       2,205          2,264
    6.00%, 8/1/15 (2)                                       2,470          2,515
    6.00%, 8/1/16 (2)                                       2,690          2,736
    6.20%, 8/1/09 (2)                                       1,270          1,354
  West Sacramento CA Financing
    Auth. Rev.
    (Water System Improvement
    Project)
    5.25%, 8/1/08 (3)                                       2,160          2,122
  West Sacramento CA Tax Allocation
    Redevelopment Project
    6.25%, 9/1/21 (1)                                       8,250          8,359
</TABLE>





                                       8
<PAGE>   9
<TABLE>
<CAPTION>
                                                             Face         Market
                                                           Amount          Value
                                                            (000)         (000)+
- --------------------------------------------------------------------------------
<S>                                                      <C>           <C>
  Whittier CA Insurance Health
    Facility Rev.
    (Presbyterian Hosp.)
    6.00%, 6/1/05 (1)                                    $  3,675      $   3,892
    6.25%, 6/1/07 (1)                                       4,260          4,583
    6.25%, 6/1/08 (1)                                       1,750          1,874
                                                                       ---------
        GROUP TOTAL                                                      851,115
                                                                       ---------
- --------------------------------------------------------------------------------
PORTFOLIO INSURED
  Sacramento CA Municipal
    Utility Dist.
    8.00%, 11/15/10                                           205            205
                                                                       ---------
- --------------------------------------------------------------------------------
SECONDARY MARKET INSURED (4.9%)
  California GO
    6.25%, 9/1/12 (3)                                       9,000          9,618
  California Housing Finance Agency
    (Single Family Mortgage)
    6.90%, 8/1/16 (6)                                       5,750          5,859
  California Public Works Board
    (Dept. of Corrections)
    6.50%, 9/1/17 (2)                                      30,000         32,236
                                                                       ---------
        GROUP TOTAL                                                       47,713
                                                                       ---------
- --------------------------------------------------------------------------------
NON-INSURED (6.5%)
  California Dept. of Water Resources
    (Central Valley Project)
    6.40%, 12/1/26                                         20,400         20,862
  California Educational
    Facilities Auth. Rev. VRDO
    (Institute of Technology)
    3.40%, 6/6/96                                           4,400          4,400
  California Health Facilities
    Financing Auth. Rev. VRDO
    (Adventist Health System West
    & Sutter Health)
    3.20%, 6/6/96                                           4,800          4,800
    (Kaiser Permanente)
    3.40%, 6/5/96                                           1,100          1,100
  Irvine CA Ranch Water Dist. VRDO
    3.50%, 6/4/96 LOC                                         400            400
    3.55%, 6/4/96 LOC                                       1,300          1,300
    3.70%, 6/4/96 LOC                                       1,200          1,200
  Kern County CA Public
    Facilities Project VRDO
    3.40%, 6/5/96 LOC                                       4,050          4,050
  Los Angeles CA Dept. of
    Water & Power
    6.50%, 4/1/10                                           3,950          4,301
  Metropolitan Water Dist. of
    Southern California
    8.00%, 7/1/08                                           2,000          2,455
  Orange County CA Sanitation Dist.
    VRDO 3.50%, 6/4/96 LOC                                    800            800
  Orange County CA Water Dist. VRDO
    3.60%, 6/4/96                                             300            300
  Pasadena CA Electric Works Rev.
    5.37%, 8/1/12                                           7,040          6,644
  Riverside County CA Public
    Facilities Project VRDO
    3.10%, 6/4/96 LOC                                       1,800          1,800
    3.50%, 6/4/96 LOC                                       2,900          2,900
  Sacramento County CA VRDO
    (Administrative Center &
    Courthouse Project)
    3.20%, 6/6/96 LOC                                         875            875
  San Diego County CA TRAN
    4.50%, 9/30/96                                            550            552
  San Diego CA Local Govt.
    Pooled TRAN
    4.75%, 10/18/96 LOC                                     1,000          1,004
  Santa Clara CA El Camino Hosp. Dist.
    Facilities Auth. Rev. Lease VRDO
    (Valley Medical Center Project)
    3.35%, 6/4/96 LOC                                       4,000          4,000
                                                                       ---------
        GROUP TOTAL                                                       63,743
                                                                       ---------
- --------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
  (Cost $928,908)                                                        962,776
- --------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (1.6%)                                             
- --------------------------------------------------------------------------------
  Other Assets--Note B                                                    18,988
  Liabilities                                                             (3,577)
                                                                       ---------
                                                                          15,411
- --------------------------------------------------------------------------------
NET ASSETS (100%)                                                               
- --------------------------------------------------------------------------------
  Applicable to 89,985,535 outstanding
    shares of beneficial interest
    (unlimited authorization--no par value)                            $ 978,187
- --------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                 $10.87
================================================================================
</TABLE>

+See Note A to Financial Statements.
For explanations of abbreviations and other references, see page 14.


<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
 AT MAY 31, 1996, NET ASSETS CONSISTED OF:                                      
- --------------------------------------------------------------------------------
                                                           AMOUNT            PER
                                                            (000)          SHARE
                                                         --------         ------
 <S>                                                     <C>              <C>
  PAID IN CAPITAL                                        $946,080         $10.51
  UNDISTRIBUTED NET
    INVESTMENT INCOME                                          --             --
  ACCUMULATED NET
    REALIZED LOSSES                                        (1,012)          (.01)
  UNREALIZED APPRECIATION
    (DEPRECIATION)--NOTE F:
    INVESTMENT SECURITIES                                  33,868            .38
    FUTURES CONTRACTS                                        (749)          (.01)
- --------------------------------------------------------------------------------
 NET ASSETS                                              $978,187         $10.87
- --------------------------------------------------------------------------------
</TABLE>





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

<TABLE>
<CAPTION>
                                                             Face         Market
INSURED INTERMEDIATE-                                      Amount          Value
TERM PORTFOLIO                                              (000)         (000)+
- --------------------------------------------------------------------------------
<S>                                                      <C>           <C>
MUNICIPAL BONDS (98.6%)                                                         
- --------------------------------------------------------------------------------
ISSUER INSURED (96.0%)
  Anaheim CA Electric System COP
    6.80%, 10/1/98 (2)                                   $  1,000      $   1,056
  California GO
    6.50%, 3/1/02 (2)                                       5,570          6,040
  California Health Facilities Auth.
    (Catholic Health Care West)
    VRDO 3.40%, 6/5/96 (1)                                    300            300
    5.75%, 7/1/10 (1)                                       7,000          7,012
    7.00%, 7/1/05 (2)                                       3,410          3,860
    7.00%, 7/1/06 (2)                                       3,395          3,853
    (Centinela Hosp.)
    6.50%, 9/1/08 (1)                                       5,000          5,354
    (Children's Hosp.)
    6.00%, 7/1/01 (1)                                       1,600          1,691
    6.00%, 7/1/02 (1)                                       1,280          1,355
    6.00%, 7/1/04 (1)                                       1,645          1,745
    6.00%, 7/1/06 (1)                                       1,000          1,056
    (Mills Peninsula)
    6.00%, 1/15/00 (7)                                      1,080          1,123
    (Sisters of Providence)
    6.00%, 10/1/09 (2)                                      4,490          4,665
  California Public Works Board
    (Community College)
    5.375%, 3/1/09 (2)                                      4,000          3,917
    (Dept. of Corrections)
    6.40%, 11/1/10 (1)                                      5,000          5,333
    6.60%, 12/1/09 (2)                                      3,500          3,773
    (Univ. of CA Regents)
    6.25%, 12/1/07 (2)                                      1,000          1,066
  Central Coast Water Auth. of CA
    6.05%, 10/1/04 (2)                                      1,800          1,925
    6.25%, 10/1/06 (2)                                      2,000          2,138
  Chino Basin Finance Auth. Municipal
    Water Dist. of CA
    6.50%, 8/1/10 (2)                                       3,095          3,377
  City of Corona CA
    Redevelopment Project
    7.50%, 9/1/04 (3)                                         970          1,128
    7.50%, 9/1/05 (3)                                       1,040          1,215
  Culver City CA Redevelopment
    Finance Auth.
    6.75%, 11/1/99 (2) (Prere.)                             2,500          2,727
  East Bay CA Municipal Utility Dist.
    Waste Water Treatment System Rev.
    6.00%, 6/1/99 (3)                                       4,300          4,491
    6.00%, 6/1/00 (3)                                       1,890          1,986
    6.375%, 6/1/12 (2) (Prere.)                             2,000          2,194
  La Quinta CA Redevelopment Agency
    8.00%, 9/1/03 (1)                                       1,325          1,567
  Long Beach CA Financing Auth.
    6.00%, 11/1/10 (2)                                      3,860          4,027
  Los Angeles CA Dept. of Water,
    Power & Electric
    5.625%, 9/1/09 (3)                                      7,000          7,042
  Los Angeles CA Transportation Rev.
    6.25%, 7/1/13 (1)                                       1,500          1,539
  Los Angeles CA Waste Water
    6.50%, 6/1/07 (1)                                       1,695          1,838
    8.70%, 11/1/02 (3)                                      2,535          3,053
  MSR CA Public Power Agency
    (San Juan Project)
    5.85%, 7/1/06 (2)                                       1,500          1,568
  North City West CA Community Dist.
    5.75%, 9/1/15 (5)                                       2,000          1,954
    6.00%, 9/1/05 (5)                                       1,510          1,601
    6.00%, 9/1/06 (5)                                       1,600          1,690
    6.00%, 9/1/07 (5)                                       1,695          1,781
  Oakland CA Redevelopment Agency
    (Central Dist. Project)
    6.00%, 2/1/06 (2)                                       5,125          5,457
  Orange County CA Municipal Water
    COP (Allen McColloch Pipeline)
    4.625%, 7/1/02 (1)                                      4,380          4,310
    4.80%, 7/1/03 (1)                                       2,000          1,975
    4.90%, 7/1/04 (1)                                       2,445          2,411
  Orange County CA Sanitation Dist.
    VRDO 3.35%, 6/6/96 (2)                                    900            900
    VRDO 3.50%, 6/4/96 (2) LOC                                800            800
    VRDO 3.60%, 6/4/96 (3)                                  2,900          2,900
    COP 6.00%, 8/1/16 (3)                                   1,500          1,614
    COP 6.40%, 8/1/07 (3)                                   1,415          1,491
  Orange County CA
    Transportation Auth.
    9.50%, 2/15/03 (3)                                      5,765          7,171
  Rancho CA Water Dist. Finance
    Auth. Rev.
    6.25%, 8/1/12 (3)                                       1,950          2,018
    6.50%, 11/1/01 (3)                                      1,590          1,727
  Redding CA Electric System Rev. COP
    7.125%, 7/1/97 (1) (Prere.)                             1,000          1,056
  Riverside County CA Public Finance
    5.25%, 9/1/02 (1)                                       2,090         2,138
    5.25%, 9/1/03 (1)                                       2,210          2,254
  Sacramento CA Municipal Utility Dist.
    6.25%, 8/15/07 (1)                                      8,000          8,516
  Sacramento CA
    Redevelopment Agency
    (Merged Downtown Project)
    6.50%, 11/1/13 (1)                                      2,000          2,076
    6.75%, 11/1/05  (1)                                     1,000          1,083
</TABLE>





                                       10
<PAGE>   11

<TABLE>
<CAPTION>
                                                             Face         Market
                                                           Amount          Value
                                                            (000)         (000)+
- --------------------------------------------------------------------------------
<S>                                                      <C>           <C>
  Sacramento County CA Public
    Facilities Finance Corp. COP
    (Main Detention Facility Project)
    5.50%, 6/1/10 (1)                                    $  5,500      $   5,458
  San Diego County CA Regional
    Transportation Comm.
    5.00%, 4/1/98 (3)                                       4,500          4,572
    6.25%, 4/1/02 (3)                                       5,000          5,359
  San Francisco CA Airport Comm. Rev.
    6.20%, 5/1/07 (2)                                       1,615          1,711
    6.50%, 5/1/13 (2)                                       2,160          2,258
  San Francisco CA City & County
    Airport Rev.
    6.00%, 10/1/11 (2)                                      2,000          2,047
    6.40%, 5/1/05 (1)                                       2,800          3,061
    6.60%, 5/1/07 (1)                                       1,000          1,085
  San Joaquin County CA COP
    (Human Services Project)
    6.70%, 5/15/99 (6) (Prere.)                             5,300          5,738
  San Jose CA Merged Area
    Redevelopment Project
    6.00%, 8/1/06 (1)                                       1,000          1,067
    7.50%, 8/1/96 (1) (Prere.)                              1,000          1,026
  San Jose/Santa Clara CA Clean
    Water Finance Auth.
    7.00%, 10/1/04 (1)                                      5,615          5,956
    7.25%, 10/1/02 (1)                                      1,500          1,580
  Santa Barbara CA Redevelopment
    Agency (Central City Project)
    5.50%, 3/1/99 (2)                                       1,645          1,694
    5.50%, 3/1/00 (2)                                       2,075          2,140
    5.50%, 3/1/01 (2)                                       2,215          2,291
  Santa Rosa CA Waste Water Service
    Facilities Dist.
    6.20%, 7/2/09 (2)                                       2,450          2,564
  South Orange County CA Public
    Finance Auth.
    6.25%, 8/15/99 (3)                                      2,000          2,112
    7.00%, 9/1/05 (1)                                       3,440          3,887
    7.00%, 9/1/07 (1)                                       1,000          1,143
    7.00%, 9/1/10 (1)                                       3,300          3,756
    9.50%, 8/15/04 (1)                                      4,395          5,711
  Southern California Public
    Power Auth.
    (Palo Verde)
    7.00%, 7/1/07 (2)                                       1,300          1,372
  Southern CA Rapid Transit Dist.
    6.00%, 9/1/08 (2)                                       2,650          2,747
  Sweetwater CA Water Rev.
    7.00%, 4/1/10 (2)                                       1,950          2,084
  Three Valley Municipal Water CA
    Dist. COP
    7.30%, 11/1/96 (1) (Prere.)                             1,000          1,045
  Tri-City CA Hosp. Dist.
    (Oceanside Hosp.)
    7.00%, 2/1/05 (1)                                         915            947
  Tulare County CA COP
    5.70%, 11/15/03 (1)                                     1,000          1,048
    5.80%, 11/15/04 (1)                                     1,000          1,053
  Univ. of California Board of Regents
    6.00%, 9/1/08 (1)                                       1,500          1,555
    10.00%, 9/1/02 (1)                                      2,950          3,746
    12.00%, 9/1/03 (2)                                      2,000          2,830
  Univ. of California
    (Multiple Purpose Project)
    10.00%, 9/1/02 (2)                                      1,000          1,267
    10.00%, 9/1/03  (2)                                     2,000          2,590
  Visalia Waste Water System
    Rev. of CA
    6.00%, 12/1/07 (1)                                      1,000          1,061
  West Basin CA Water Dist.
    6.80%, 8/1/00 (2) (Prere.)                              2,000          2,201
  Whittier CA Insurance Health
    Facilities Rev.
    (Presbyterian Hosp.)
    6.00%, 6/1/00 (1)                                       1,895          1,989
    6.00%, 6/1/03 (1)                                       3,380          3,584
    6.00%, 6/1/04 (1)                                       3,580          3,797
                                                                       ---------
        GROUP TOTAL                                                      253,069
                                                                       ---------
- --------------------------------------------------------------------------------
NON-INSURED (2.6%)
  California Health Facilities Finance
    Auth. Rev. VRDO
    (Adventist Health System West
    Sutter Health)
    3.20%, 6/6/96 LOC                                         200            200
  Kern County CA Public Facilities
    Project VRDO
    3.40%, 6/5/96 LOC                                         300            300
  Riverside County CA Public
    Facilities Project VRDO
    3.10%, 6/4/96 LOC                                       2,525          2,525
    3.50%, 6/4/96 LOC                                       1,400          1,400
  San Diego CA Local Govt.
    Pooled TRAN
    4.75%, 10/18/96                                         2,500          2,510
                                                                       ---------
        GROUP TOTAL                                                        6,935
                                                                       ---------
- --------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
  (Cost $256,443)                                                        260,004
- --------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (1.4%)                                             
- --------------------------------------------------------------------------------
  Other Assets--Note B                                                     4,757
  Liabilities                                                             (1,004)
                                                                       ---------
                                                                           3,753
- --------------------------------------------------------------------------------
</TABLE>





                                       11
<PAGE>   12
                      STATEMENT OF NET ASSETS (continued)

<TABLE>
<CAPTION>
                                                                          Market
INSURED INTERMEDIATE-TERM                                                  Value
PORTFOLIO (continued)                                                     (000)+
- --------------------------------------------------------------------------------
<S>                                                                     <C>
NET ASSETS (100%)                                                               
- --------------------------------------------------------------------------------
  Applicable to 25,725,344 outstanding
    shares of beneficial interest
    (unlimited authorization--no par value)                             $263,757
- --------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                 $10.25
================================================================================
</TABLE>

+See Note A to Financial Statements.
For explanations of abbreviations and other references, see page 14.


<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
AT MAY 31, 1996, NET ASSETS CONSISTED OF:                                       
- --------------------------------------------------------------------------------
                                                           AMOUNT            PER
                                                            (000)          SHARE
                                                         --------         ------
<S>                                                      <C>              <C>
  PAID IN CAPITAL                                        $260,087         $10.11
  UNDISTRIBUTED NET
    INVESTMENT INCOME                                          --             --
  ACCUMULATED NET
    REALIZED GAINS                                            257            .01
  UNREALIZED APPRECIATION
    (DEPRECIATION)--NOTE F:
    INVESTMENT SECURITIES                                   3,561            .14
    FUTURES CONTRACTS                                        (148)          (.01)
- --------------------------------------------------------------------------------
NET ASSETS                                               $263,757         $10.25
- --------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                                             Face         Market
MONEY MARKET                                               Amount          Value
PORTFOLIO                                                   (000)         (000)+
- --------------------------------------------------------------------------------
<S>                                                      <C>           <C>
MUNICIPAL BONDS (100.3%)                                                        
- --------------------------------------------------------------------------------
  Alameda County CA TRAN
    4.75%, 7/25/96 LOC                                   $  9,900      $   9,912
  Anaheim CA Public Improvement
    Corp. Lease COP VRDO
    (Refunding Projects)
    3.30%, 6/5/96 (2)                                      45,750         45,750
  California Health Facilities Finance
    Auth. Rev. VRDO
    (Adventist Health System West
    Sutter Health)
    3.20%-3.30%, 6/6/96 LOC                                27,300         27,300
    (Catholic Health Care West)
    3.40%, 6/5/96 (1)                                      31,200         31,200
    (Kaiser Permanente)
    3.40%, 6/5/96                                          39,100         39,100
    (Pooled Program)
    3.20%, 6/5/96 LOC                                       6,300          6,300
    (St. Francis Medical Center)
    3.40%, 6/5/96 (1)                                      49,600         49,600
    (St. Joseph Health)
    3.40%, 6/4/96                                           6,400          6,400
  California PCR Finance Auth. CP
    (Pacific Gas & Electric)
    3.15%-3.60%,
    7/10/96-10/21/96 LOC                                  123,800        123,800
  California PCR Finance Auth. PUT
    (San Diego Gas & Electric)
    4.00%, 9/1/96                                          10,000         10,000
  California PCR Finance Auth. VRDO
    (Exxon Project)
    3.70%, 6/4/96                                           4,100          4,100
    (Pacific Gas & Electric)
    3.75%, 6/4/96 LOC                                       3,700          3,700
  California RAN
    4.25%, 6/28/96                                         38,500         38,515
  California School Cash Reserve Auth.
    (Pooled Program)
    4.75%, 7/3/96 (1) LOC                                  25,000         25,018
  California Statewide Communities
    Development Auth.
    VRDO (Kaiser Permanente)
    3.40%, 6/5/96                                           2,500          2,500
  Contra Costa County CA TRAN
    4.50%, 7/3/96                                          12,000         12,009
  East Bay CA Municipal Utility
    Dist. CP
    3.40%-3.60%, 7/8/96-8/8/96                             34,650         34,650
  Foothill CA Eastern Transportation
    Corridor Agency Toll Road
    Rev. VRDO
    3.35%, 6/6/96 LOC                                      25,000         25,000
</TABLE>





                                       12
<PAGE>   13
<TABLE>
<CAPTION>
                                                             Face         Market
                                                           Amount          Value
                                                            (000)         (000)+
- --------------------------------------------------------------------------------
  <S>                                                    <C>           <C>
  Fresno County CA TRAN
    4.50%, 7/2/96                                        $ 15,000      $  15,009
  Irvine CA Assessment Dist. CP
    (Irvine County)
    3.60%-3.90%,
    6/4/96-6/10/96 LOC                                     61,844         61,844
  Kern County CA Public Facilities
    Project VRDO
    3.40%, 6/5/96 LOC                                      28,850         28,850
  Kern County CA TRAN
    4.50%, 7/2/96                                          10,000         10,005
  Los Angeles CA Community
    College TRAN
    4.50%, 7/31/96 LOC                                     13,000         13,011
  Los Angeles CA Dept. of Water &
    Power CP
    3.45%, 7/8/96                                           7,950          7,950
    3.70%, 8/8/96                                           5,850          5,850
  Los Angeles County CA Metropolitan
    Transit Auth. VRDO
    (Union St. Gateway Project)
    3.60%, 6/6/96 (4)                                       5,400          5,400
  Los Angeles County CA Metropolitan
    Transportation Auth.
    CP 3.40%-3.65%,
    8/14/96-8/23/96 LOC                                    19,200         19,200
    VRDO 3.35%, 6/6/96 (1)                                  5,000          5,000
  Los Angeles County CA Pension
    Obligations VRDO
    3.40%, 6/5/96 (2)                                      57,000         57,000
  Los Angeles County CA TRAN
    4.50%, 7/1/96 LOC                                      69,500         69,539
  Los Angeles County CA
    Transportation Commission
    Sales Tax Rev. Refunding VRDO
    3.30%, 6/5/96 (3)                                       6,200          6,200
  Metropolitan Water Dist. of
    Southern CA CP
    3.45%, 7/8/96                                           5,000          5,000
  Orange County CA Sanitation
    Dist. VRDO
    3.35%, 6/6/96 (2)                                      18,900         18,900
    3.50%, 6/4/96 LOC                                      13,000         13,000
    3.50%, 6/4/96 (2) LOC                                  25,750         25,750
  Pittsburg CA Redevelopment Agency
    (Los Medanos Community
    Development Project)
    7.75%, 8/1/96 (Prere.)                                  7,050          7,237
  Rancho Water Dist. Finance
    Auth. CA
    6.50%, 11/1/96 (3)                                      1,105          1,118
  Riverside County CA Public
    Facilities Project VRDO
    3.10%-3.50%, 6/4/96 LOC                                29,605         29,605
  Riverside County CA TRAN
    4.75%, 7/1/96                                          10,000         10,007
  Sacramento CA Municipal Utility
    Dist. Prerefunded TOB VRDO
    3.60%, 6/6/96 (1)                                      12,185         12,185
  Sacramento City CA TRAN
    4.75%, 12/27/96                                         1,800          1,810
  Sacramento County CA
    Administration Center &
    Courthouse Project VRDO
    3.20%, 6/6/96 LOC                                      26,650         26,650
  Sacramento County CA TRAN
    4.75%, 10/4/96                                         38,800         38,908
  San Bernardino CA Transportation
    Auth. Sales Tax Rev. VRDO
    3.40%, 6/6/96 LOC                                      38,690         38,690
  San Bernardino County CA TRAN
    4.50%, 7/5/96 LOC                                      17,500         17,509
  San Diego CA Local Govt.
    Pooled TRAN
    4.75%, 10/18/96                                        24,000         24,093
  San Diego City CA TRAN
    4.75%, 7/3/96                                          10,000         10,006
  San Diego CA Unified School
    Dist. TRAN
    4.75%, 10/10/96 LOC                                    47,500         47,671
  San Diego County CA TRAN
    4.50%, 9/30/96                                         46,000         46,101
  San Diego County CA Water Auth.
    3.60%, 7/19/96                                          1,400          1,400
  San Francisco City CA TRAN
    4.75%, 9/19/96                                         10,000         10,024
  San Jose/Santa Clara CA Clean
    Water Finance Auth. VRDO
    3.35%, 6/5/96 (3)                                       3,700          3,700
  San Mateo County CA COP VRDO
    3.25%, 6/4/96 LOC                                         995            995
  San Mateo County CA TRAN
    4.50%, 7/1/96                                           5,000          5,004
  Santa Clara CA El Camino Hosp. Dist.
    Facilities Auth. Rev. Lease VRDO
    (Valley Medical Center Project)
    3.35%, 6/4/96 LOC                                      33,900         33,900
  Sonoma County CA TRAN
    4.25%, 11/1/96                                          9,680          9,698
</TABLE>





                                       13
<PAGE>   14
                      STATEMENT OF NET ASSETS (continued)

<TABLE>
<CAPTION>
                                                             Face         Market
MONEY MARKET                                               Amount          Value
PORTFOLIO (continued)                                       (000)         (000)+
- --------------------------------------------------------------------------------
<S>                                                      <C>          <C>
  Southern California Public Power
    Auth. VRDO
    (Palo Verde Project)
    3.30%, 6/5/96 (2)                                    $  9,600      $  9,600
    (Transmission Project)
    3.30%, 6/5/96 (2)                                      28,200         28,200
  Turlock CA Irrigation Dist. COP
    (Transmission Project)
    VRDO 3.25%, 6/5/96 LOC                                  3,000          3,000
- --------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
  (Cost $1,279,473)                                                    1,279,473
- --------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (-.3%)                                             
- --------------------------------------------------------------------------------
  Other Assets--Note B                                                    23,062
  Liabilities                                                            (26,710)
                                                                       ---------
                                                                          (3,648)
- --------------------------------------------------------------------------------
NET ASSETS (100%)                                                               
- --------------------------------------------------------------------------------
  Applicable to 1,275,783,142 outstanding
    shares of beneficial interest
    (unlimited authorization--no par value)                           $1,275,825
- --------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                  $1.00
================================================================================
</TABLE>

+See Note A to Financial Statements.


<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
AT MAY 31, 1996, NET ASSETS CONSISTED OF:                                       
- --------------------------------------------------------------------------------
                                                           AMOUNT            PER
                                                            (000)          SHARE
                                                       ----------         ------
<S>                                                    <C>                 <C>
  PAID IN CAPITAL                                      $1,275,923          $1.00
  UNDISTRIBUTED NET
    INVESTMENT INCOME                                          --             --
  ACCUMULATED NET
    REALIZED LOSSES                                           (98)            --
  UNREALIZED APPRECIATION
    OF INVESTMENTS                                             --             --
- --------------------------------------------------------------------------------
NET ASSETS                                             $1,275,825          $1.00
- --------------------------------------------------------------------------------
</TABLE>

BAN=Bond Anticipation Note
COP=Certificate of Participation
CP=Commercial Paper
GO=General Obligation Bond
IDA=Industrial Development Authority Bond
IDR=Industrial Development Revenue Bond
PCR=Pollution Control Revenue Bond
PUT=Put Option Obligation
RAN=Revenue Anticipation Note
RAW=Revenue Anticipation Warrant
Rev.=Revenue Bond
TAN=Tax Anticipation Note
TOB=Tender Option Bond
TRAN=Tax Revenue Anticipation Note
VRDO=Variable Rate Demand Obligation
(ETM)=Escrowed to Maturity
(Prere.)=Prerefunded

Scheduled principal and interest payments are guaranteed by:
(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)
The insurance does not guarantee the market value of the
municipal bonds.

LOC=Scheduled principal and interest payments are guaranteed by bank letter
of credit.





                                       14
<PAGE>   15
                            STATEMENT OF OPERATIONS

<TABLE>
<CAPTION>
                                                                                         INSURED
                                                                    INSURED        INTERMEDIATE-
                                                                  LONG-TERM                 TERM        MONEY MARKET
                                                                  PORTFOLIO            PORTFOLIO           PORTFOLIO
- --------------------------------------------------------------------------------------------------------------------
                                                           Six Months Ended     Six Months Ended    Six Months Ended
                                                               May 31, 1996         May 31, 1996        May 31, 1996
                                                                      (000)                (000)               (000)
- --------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>    <C>          <C>     <C>          <C>     <C>
INVESTMENT INCOME
   INCOME
      Interest  . . . . . . . . . . . . . . . . . . .              $ 27,193              $ 5,923             $21,823
- --------------------------------------------------------------------------------------------------------------------
            Total Income  . . . . . . . . . . . . . .                27,193                5,923              21,823
- --------------------------------------------------------------------------------------------------------------------
   EXPENSES
      The Vanguard Group--Note B
         Investment Advisory Services   . . . . . . .       $  58               $  13                $  72
         Management and Administrative  . . . . . . .         735                 178                  893
         Marketing and Distribution   . . . . . . . .         104       897        32        223       190     1,155
                                                            -----               -----                -----          
      Insurance Expense . . . . . . . . . . . . . . .                     1                   --                  --
      Custodian Fees  . . . . . . . . . . . . . . . .                    12                    4                  18
      Auditing Fees   . . . . . . . . . . . . . . . .                     5                    3                   4
      Shareholders' Reports   . . . . . . . . . . . .                    16                    3                  17
      Annual Meeting and Proxy Costs  . . . . . . . .                     3                    1                   3
      Trustees' Fees and Expenses   . . . . . . . . .                     1                   --                   2
- --------------------------------------------------------------------------------------------------------------------
         Total Expenses . . . . . . . . . . . . . . .                   935                  234               1,199
         Expenses Paid Indirectly--Note C   . . . . .                   (12)                 (14)                (18)
- -------------------------------------------------------------------------------------------------------------------- 
            Net Expenses  . . . . . . . . . . . . . .                   923                  220               1,181
- --------------------------------------------------------------------------------------------------------------------
               Net Investment Income  . . . . . . . .                26,270                5,703              20,642
- --------------------------------------------------------------------------------------------------------------------
REALIZED NET GAIN (LOSS)
      Investment Securities Sold  . . . . . . . . . .                 4,070                  920                   2
      Futures Contracts . . . . . . . . . . . . . . .                (1,682)                (146)                 --
- --------------------------------------------------------------------------------------------------------------------
               Realized Net Gain  . . . . . . . . . .                 2,388                  774                   2
- --------------------------------------------------------------------------------------------------------------------
CHANGE IN UNREALIZED APPRECIATION
   (DEPRECIATION)
      Investment Securities . . . . . . . . . . . . .               (39,341)              (5,272)                 --
      Futures Contracts . . . . . . . . . . . . . . .                 1,622                  118                  --
- --------------------------------------------------------------------------------------------------------------------
            Change in Unrealized
               Appreciation (Depreciation)  . . . . .               (37,719)              (5,154)                 --
- --------------------------------------------------------------------------------------------------------------------
            Net Increase (Decrease) in Net Assets
               Resulting from Operations  . . . . . .              $ (9,061)             $ 1,323             $20,644
- --------------------------------------------------------------------------------------------------------------------
</TABLE>





                                       15
<PAGE>   16
                       STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
                                                                           INSURED                            INSURED
                                                                         LONG-TERM                  INTERMEDIATE-TERM
                                                                         PORTFOLIO                          PORTFOLIO
- ---------------------------------------------------------------------------------------------------------------------
                                                 SIX MONTHS ENDED       Year Ended  SIX MONTHS ENDED       Year Ended
                                                          MAY 31,     November 30,           MAY 31,     November 30,
                                                             1996             1995              1996             1995
                                                            (000)            (000)             (000)            (000)
- ---------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>              <C>               <C>              <C>
INCREASE IN NET ASSETS
OPERATIONS
   Net Investment Income  . . . . . . . . . . . . . .    $ 26,270         $ 50,834          $  5,703         $  8,062
   Realized Net Gain (Loss)   . . . . . . . . . . . .       2,388           (3,444)              774             (322)
   Change in Unrealized Appreciation
      (Depreciation)    . . . . . . . . . . . . . . .     (37,719)         116,910            (5,154)          12,089
- ---------------------------------------------------------------------------------------------------------------------
      Net Increase (Decrease) in Net Assets
         Resulting from Operations  . . . . . . . . .      (9,061)         164,300             1,323           19,829
- ---------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
   Net Investment Income  . . . . . . . . . . . . . .     (26,270)         (50,834)           (5,703)          (8,062)
   Realized Net Gain  . . . . . . . . . . . . . . . .          --               --                --               --
- ---------------------------------------------------------------------------------------------------------------------
      Total Distributions   . . . . . . . . . . . . .     (26,270)         (50,834)           (5,703)          (8,062)
- --------------------------------------------------------------------------------------------------------------------- 
CAPITAL SHARE TRANSACTIONS (1)
   Issued . . . . . . . . . . . . . . . . . . . . . .     104,130          203,465            94,198          142,574
   Issued in Lieu of Cash Distributions   . . . . . .      17,586           34,047             4,276            5,947
   Redeemed . . . . . . . . . . . . . . . . . . . . .     (82,869)        (210,397)          (36,021)         (54,878)
- --------------------------------------------------------------------------------------------------------------------- 
      Net Increase from Capital Share Transactions  .      38,847           27,115            62,453           93,643
- ---------------------------------------------------------------------------------------------------------------------
      Total Increase  . . . . . . . . . . . . . . . .       3,516          140,581            58,073          105,410
- ---------------------------------------------------------------------------------------------------------------------
NET ASSETS
   Beginning of Period  . . . . . . . . . . . . . . .     974,671          834,090           205,684          100,274
- ---------------------------------------------------------------------------------------------------------------------
   End of Period  . . . . . . . . . . . . . . . . . .    $978,187         $974,671          $263,757         $205,684
=====================================================================================================================
   (1)Shares Issued and Redeemed
      Issued  . . . . . . . . . . . . . . . . . . . .       9,363           19,004             9,077           14,150
      Issued in Lieu of Cash Distributions  . . . . .       1,580            3,152               412              584
      Redeemed  . . . . . . . . . . . . . . . . . . .      (7,443)         (19,770)           (3,471)          (5,429)
- --------------------------------------------------------------------------------------------------------------------- 
                                                            3,500            2,386             6,018            9,305
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>





                                       16
<PAGE>   17
<TABLE>
<CAPTION>
                                                                                                         MONEY MARKET
                                                                                                            PORTFOLIO
- ---------------------------------------------------------------------------------------------------------------------
                                                                                    SIX MONTHS ENDED       Year Ended
                                                                                             MAY 31,     November 30,
                                                                                                1996             1995
                                                                                               (000)            (000)
- ---------------------------------------------------------------------------------------------------------------------
<S>                                                                                       <C>             <C>
INCREASE IN NET ASSETS
OPERATIONS
   Net Investment Income  . . . . . . . . . . . . . . . . . . . . . . . . . . . .         $   20,642      $    40,549
   Realized Net Gain (Loss)   . . . . . . . . . . . . . . . . . . . . . . . . . .                  2               60
   Change in Unrealized Appreciation
      (Depreciation)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                 --               --
- ---------------------------------------------------------------------------------------------------------------------
      Net Increase (Decrease) in Net Assets
         Resulting from Operations  . . . . . . . . . . . . . . . . . . . . . . .             20,644           40,609
- ---------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
   Net Investment Income  . . . . . . . . . . . . . . . . . . . . . . . . . . . .            (20,642)         (40,549)
   Realized Net Gain  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                 --               --
- ---------------------------------------------------------------------------------------------------------------------
      Total Distributions   . . . . . . . . . . . . . . . . . . . . . . . . . . .            (20,642)         (40,549)
- --------------------------------------------------------------------------------------------------------------------- 
CAPITAL SHARE TRANSACTIONS (1)
   Issued   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            689,503        1,118,819
   Issued in Lieu of Cash Distributions   . . . . . . . . . . . . . . . . . . . .             19,199           37,820
   Redeemed   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           (634,807)      (1,113,589)
- --------------------------------------------------------------------------------------------------------------------- 
      Net Increase from Capital Share Transactions  . . . . . . . . . . . . . . .             73,895           43,050
- ---------------------------------------------------------------------------------------------------------------------
      Total Increase  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             73,897           43,110
- ---------------------------------------------------------------------------------------------------------------------
NET ASSETS
   Beginning of Period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          1,201,928        1,158,818
- ---------------------------------------------------------------------------------------------------------------------
   End of Period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         $1,275,825      $ 1,201,928
=====================================================================================================================
   (1)Shares Issued and Redeemed
      Issued  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            689,503        1,118,819
      Issued in Lieu of Cash Distributions  . . . . . . . . . . . . . . . . . . .             19,199           37,820
      Redeemed  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           (634,807)      (1,113,589)
- --------------------------------------------------------------------------------------------------------------------- 
                                                                                              73,895           43,050
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>





                                       17
<PAGE>   18
                              FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>
                                                                                 INSURED LONG-TERM PORTFOLIO            
- -------------------------------------------------------------------------------------------------------------------------
                                                                                   Year Ended November 30,
                                            SIX MONTHS ENDED    ---------------------------------------------------------
For a Share Outstanding Throughout Each Period  MAY 31, 1996        1995        1994         1993        1992        1991
- -------------------------------------------------------------------------------------------------------------------------
<S>                                                   <C>        <C>          <C>         <C>         <C>          <C>
NET ASSET VALUE, BEGINNING OF PERIOD  . . . . . .     $11.27     $  9.92      $11.30      $10.89       $10.43      $10.22
                                                      ------     -------      ------      -------      ------      ------
INVESTMENT OPERATIONS
   Net Investment Income    . . . . . . . . . . .       .299        .602        .604         .604        .633        .644
   Net Realized and Unrealized Gain (Loss)
      on Investments  . . . . . . . . . . . . . .      (.400)      1.350      (1.228)        .609        .464        .210
                                                      ------     -------      ------      -------      ------      ------
         TOTAL FROM INVESTMENT OPERATIONS . . . .      (.101)      1.952       (.624)       1.213       1.097        .854
- -------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
   Dividends from Net Investment Income   . . . .      (.299)      (.602)      (.604)       (.604)      (.633)      (.644)
   Distributions from Realized Capital Gains  . .         --          --       (.152)       (.199)      (.004)         --
                                                      ------     -------      ------      -------      ------      ------
         TOTAL DISTRIBUTIONS  . . . . . . . . . .      (.299)      (.602)      (.756)       (.803)      (.637)      (.644)
- -------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . . .     $10.87      $11.27     $  9.92       $11.30      $10.89      $10.43
=========================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . . .     -0.93%     +20.11%      -5.88%      +11.53%     +10.81%      +8.61%
- -------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA 
- -------------------------
Net Assets, End of Period (Millions)  . . . . . .       $978        $975        $834       $1,074        $828        $629
Ratio of Total Expenses to Average Net Assets . .      .19%*        .20%        .19%         .19%        .24%       .25%+
Ratio of Net Investment Income to
   Average Net Assets . . . . . . . . . . . . . .     5.35%*       5.59%       5.60%        5.38%       5.92%       6.24%
Portfolio Turnover Rate . . . . . . . . . . . . .       18%*         23%         28%          27%         54%         19%
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>

+Insurance expense represents .01%. 
*Annualized.





                                       18
<PAGE>   19
<TABLE>
<CAPTION>
                                                            INSURED INTERMEDIATE-TERM PORTFOLIO                         
- -------------------------------------------------------------------------------------------------------------
                                            SIX MONTHS ENDED              Year Ended               March 4 to
For a Share Outstanding Throughout Each Period  MAY 31, 1996       November 30, 1995        November 30, 1994
- -------------------------------------------------------------------------------------------------------------
<S>                                                  <C>                     <C>                       <C>
NET ASSET VALUE, BEGINNING OF PERIOD  . . . . .       $10.44                  $ 9.64                   $10.00
                                                      ------                  ------                   ------
INVESTMENT OPERATIONS
   Net Investment Income  . . . . . . . . . . .         .254                    .511                     .346
   Net Realized and Unrealized Gain (Loss)
      on Investments  . . . . . . . . . . . . .        (.190)                   .800                    (.360)
                                                      ------                  ------                   ------ 
         TOTAL FROM INVESTMENT OPERATIONS . . .         .064                   1.311                    (.014)
- ------------------------------------------------------------------------------------------------------------- 
DISTRIBUTIONS
   Dividends from Net Investment Income   . . .        (.254)                  (.511)                   (.346)
   Distributions from Realized Capital Gains  .           --                      --                       --
                                                      ------                  ------                   ------
         TOTAL DISTRIBUTIONS  . . . . . . . . .        (.254)                  (.511)                   (.346)
- ------------------------------------------------------------------------------------------------------------- 
NET ASSET VALUE, END OF PERIOD  . . . . . . . .       $10.25                  $10.44                   $ 9.64
=============================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . .       +0.61%                 +13.88%                   -0.19%
- -------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- ------------------------
Net Assets, End of Period (Millions)  . . . . .         $264                    $206                     $100
Ratio of Total Expenses to Average Net 
   Assets--Note C . . . . . . . . . . . . . . .        .20%*                    .21%                    .19%*
Ratio of Net Investment Income to
   Average Net Assets   . . . . . . . . . . . .       4.88%*                   5.05%                   4.97%*
Portfolio Turnover Rate . . . . . . . . . . . .         14%*                     11%                       6%
- -------------------------------------------------------------------------------------------------------------
</TABLE>
*Annualized.





                                       19
<PAGE>   20
                        FINANCIAL HIGHLIGHTS (continued)

<TABLE>
<CAPTION>
                                                                                   MONEY MARKET PORTFOLIO            
- -------------------------------------------------------------------------------------------------------------------------
                                                                                   Year Ended November 30,            
                                            SIX MONTHS ENDED      -------------------------------------------------------
For a Share Outstanding Throughout Each Period  MAY 31, 1996        1995        1994         1993        1992        1991
- -------------------------------------------------------------------------------------------------------------------------
<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    . . . . . . . . . . .       .017        .036        .026         .024        .029        .043
   Net Realized and Unrealized Gain (Loss)
      on Investments  . . . . . . . . . . . . . .         --          --          --           --          --          --
                                                     -------      ------      ------       ------       -----       -----
         TOTAL FROM INVESTMENT OPERATIONS   . . .       .017        .036        .026         .024        .029        .043
- -------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
   Dividends from Net Investment Income   . . . .      (.017)      (.036)      (.026)       (.024)      (.029)      (.043)
   Distributions from Realized Capital Gains  . .         --          --          --           --          --          --
                                                     -------      ------      ------       ------       -----       -----
         TOTAL DISTRIBUTIONS  . . . . . . . . . .      (.017)      (.036)      (.026)       (.024)      (.029)      (.043)
- ------------------------------------------------------------------------------------------------------------------------- 
NET ASSET VALUE, END OF PERIOD  . . . . . . . . .    $  1.00      $ 1.00      $ 1.00       $ 1.00       $1.00       $1.00
=========================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . . .     +1.66%      +3.69%      +2.59%       +2.40%      +2.97%      +4.44%
- -------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)  . . . . . .     $1,276      $1,202      $1,159       $1,006      $  794      $  759
Ratio of Total Expenses to Average Net Assets . .      .19%*        .20%        .19%         .19%        .24%        .24%
Ratio of Net Investment Income to
   Average Net Assets . . . . . . . . . . . . . .     3.28%*       3.61%       2.57%        2.37%       2.92%       4.32%
Portfolio Turnover Rate . . . . . . . . . . . . .        N/A         N/A         N/A          N/A         N/A         N/A
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>
*Annualized.





                                       20
<PAGE>   21
                         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 Municipal Bond Index, U.S. Treasury Bond, and U.S. Treasury Note
   futures contracts to a limited extent, with the objectives of enhancing
   returns, managing interest rate risk, maintaining liquidity, diversifying
   credit risk, and minimizing transaction costs. The Portfolios may purchase
   futures contracts instead of municipal bonds when futures contracts are
   believed to be priced more attractively than municipal bonds. The Portfolios
   may also seek to take advantage of price differences among bond market
   sectors by simultaneously buying futures (or bonds) of one market sector and
   selling futures (or bonds) of another sector. Futures contracts may also be
   used to simulate a fully invested position in the underlying bonds while
   maintaining a cash balance for liquidity.

   The primary risks associated with the use of futures contracts are imperfect
   correlation between changes in market values of 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 values 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 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. At May 31, 1996, the Fund had contributed capital aggregating
$259,000 to Vanguard (included in Other Assets),





                                       21
<PAGE>   22
                   NOTES TO FINANCIAL STATEMENTS (continued)

representing 1.3% of Vanguard's capitalization. The Fund's officers and
trustees are also officers and directors of Vanguard.

C.   The Fund's investment adviser may direct new issue portfolio purchases,
subject to obtaining the best price and execution, to underwriters who have
agreed to rebate or credit to the Fund a portion of the underwriting fees
generated. Such rebates or credits are used solely to reduce the Fund's
administrative expenses. The Fund's custodian bank has also agreed to reduce
its fees when the Fund maintains cash on deposit in the non-interest bearing
custodian account. For the six months ended May 31, 1996, directed brokerage
and custodian fee offset arrangements reduced expenses by:

<TABLE>
<CAPTION>
- ------------------------------------------------------------------
                           EXPENSE REDUCTION                    
                                 (000)             Total Expense
                         ----------------------   Reduction as a
                          Directed    Custodian Percent of Average
Portfolio                 Brokerage     Fees        Net Assets    
- ------------------------------------------------------------------
<S>                          <C>           <C>          <C>
INSURED LONG-TERM            --            $12           --
INSURED
  INTERMEDIATE-TERM          $10             4          .01%
MONEY MARKET                 --             18           --       
- ------------------------------------------------------------------
</TABLE>

D.   During the six months ended May 31, 1996, purchases and sales of
investment securities, other than temporary cash investments, were:


<TABLE>
<CAPTION>
- -------------------------------------------------------------
                                             (000)           
                                    -------------------------
Portfolio                           Purchases       Sales    
- -------------------------------------------------------------
<S>                                  <C>           <C>
INSURED LONG-TERM                    $94,217       $80,611
INSURED INTERMEDIATE-TERM             70,612        15,742    
- -------------------------------------------------------------
</TABLE>


E.   At November 30, 1995, capital loss carryforwards available to offset
future net capital gains were:

<TABLE>
<CAPTION>
- -------------------------------------------------------------
                                 Expiration
                            Fiscal Year(s) Ending   Amount
Portfolio                        November 30         (000)   
- -------------------------------------------------------------
<S>                                <C>              <C>
INSURED LONG-TERM                  2002-2003        $1,098
INSURED INTERMEDIATE-TERM          2002-2003           418    
- --------------------------------------------------------------
</TABLE>

F.   At May 31, 1996, unrealized appreciation of investment securities for
financial reporting and Federal income tax purposes was:


<TABLE>
<CAPTION>
- ---------------------------------------------------------------
                                         (000)                  
                         --------------------------------------
                                          Net
                         Appreciated  Depreciated   Unrealized
Portfolio                Securities   Securities   Appreciation
- ---------------------------------------------------------------
<S>                         <C>          <C>          <C>
INSURED LONG-TERM           $37,285      $(3,417)     $33,868
INSURED INTERMEDIATE-TERM     4,442         (881)       3,561   
- ---------------------------------------------------------------
</TABLE>

At May 31, 1996, the aggregate settlement value of open futures contracts
expiring in September 1996, and the related unrealized depreciation were:

<TABLE>
<CAPTION>
- ------------------------------------------------------------
                                             (000)           
                                    ------------------------
                                    Aggregate
                                    Settlement   Unrealized
Portfolio/Futures Contracts         Value       Depreciation
- ------------------------------------------------------------
<S>                                  <C>             <C>
INSURED LONG-TERM
  LONG U.S. TREASURY BOND            $48,389         $(749)
INSURED INTERMEDIATE-TERM
  LONG U.S. TREASURY NOTE             12,515          (148)
- ------------------------------------------------------------
</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 $3,141,000 and $430,000, respectively.





                                       22
<PAGE>   23
                             TRUSTEES AND OFFICERS

JOHN C. BOGLE, Chairman of the Board
Chairman and Director of The Vanguard Group, Inc.,
and of each of the investment companies in The
Vanguard Group.

JOHN J. BRENNAN, President and Chief Executive Officer
President and Director of The Vanguard Group, Inc.,
and of each of the investment companies in The
Vanguard Group.

ROBERT E. CAWTHORN, Chairman of Rhone-Poulenc
Rorer Inc.; Director of Sun Company, Inc.; Director of
Westinghouse Electric Corporation.

BARBARA BARNES HAUPTFUHRER, Director of The Great
Atlantic and Pacific Tea Co., Alco Standard Corp.,
Raytheon Co., Knight-Ridder, Inc., and Massachusetts
Mutual Life Insurance Co.

BURTON G. MALKIEL, Chemical Bank Chairman's
Professor of Economics, Princeton University; Director
of Prudential Insurance Co. of America, Amdahl Corp.,
Baker Fentress & Co., The Jeffrey Co., and Southern
New England Communications Co.

ALFRED M. RANKIN, JR., Chairman, President, and
Chief Executive Officer of NACCO Industries, Inc.;
Director of NACCO Industries, The BFGoodrich Co.,
and The Standard Products Co.

JOHN C. SAWHILL, President and Chief Executive Officer
of The Nature Conservancy; formerly, Director and
Senior Partner of McKinsey & Co. and President of New
York University; Director of Pacific Gas and Electric Co.
and NACCO Industries.

JAMES O. WELCH, JR., Retired Chairman of Nabisco
Brands, Inc.; retired Vice Chairman and Director of RJR
Nabisco; Director of TECO Energy, Inc. and Kmart Corp.

J. LAWRENCE WILSON, Chairman and Chief Executive
Officer of Rohm & Haas Co.; Director of Cummins
Engine Co.; Trustee of Vanderbilt University.


OTHER FUND OFFICERS

RAYMOND J. KLAPINSKY, Secretary; Senior Vice
President and Secretary of The Vanguard Group, Inc.;
Secretary of each of the investment companies in The
Vanguard Group.

RICHARD F. HYLAND, Treasurer; Treasurer of The
Vanguard Group, Inc., and of each of the investment
companies in The Vanguard Group.

KAREN E. WEST, Controller; Vice President of The
Vanguard Group, Inc.; Controller of each of the
investment companies in The Vanguard Group.


OTHER VANGUARD GROUP OFFICERS

ROBERT A. DiSTEFANO               F. WILLIAM McNABB III
Senior Vice President             Senior Vice President
Information Technology            Institutional

JAMES H. GATELY                   RALPH K. PACKARD
Senior Vice President             Senior Vice President
Individual Investor Group         Chief Financial Officer

IAN A. MacKINNON
Senior Vice President
Fixed Income Group





                                       23
<PAGE>   24
                          THE VANGUARD FAMILY OF FUNDS


                               FIXED INCOME FUNDS

MONEY MARKET FUNDS
Vanguard Admiral Funds
U.S. Treasury Money
 Market Portfolio
Vanguard Money Market Reserves
TAX-EXEMPT MONEY MARKET FUNDS
Vanguard Municipal Bond Fund
Money Market Portfolio
Vanguard State Tax-Free Funds
Money Market Portfolios
 (CA, NJ, OH, PA)
TAX-EXEMPT INCOME FUNDS
Vanguard Municipal Bond Fund
Vanguard State Tax-Free Funds
Insured Longer-Term Portfolios
 (CA, FL, NJ, NY, OH, PA)
INCOME FUNDS
Vanguard Admiral Funds
 Vanguard Fixed Income
Securities Fund
Vanguard Preferred Stock Fund


                           EQUITY AND BALANCED FUNDS

GROWTH AND INCOME FUNDS
Vanguard Convertible
Securities Fund
Vanguard Equity Income Fund
Vanguard Quantitative Portfolios
Vanguard Selected Value Portfolio
Vanguard/Trustees' Equity Fund
U.S. Portfolio
Vanguard/Windsor Fund
Vanguard/Windsor II
BALANCED FUNDS
Vanguard Asset Allocation Fund
Vanguard LifeStrategy Funds
Income Portfolio
Conservative Growth Portfolio
Moderate Growth Portfolio
Growth Portfolio
Vanguard STAR Portfolio
Vanguard/Wellesley Income Fund
Vanguard/Wellington Fund
GROWTH FUNDS
Vanguard/Morgan Growth Fund
Vanguard/PRIMECAP Fund
Vanguard U.S. Growth Portfolio
AGGRESSIVE GROWTH FUNDS
Vanguard Explorer Fund
Vanguard Horizon Fund
Global Equity Portfolio
Global Asset Allocation Portfolio
Capital Opportunity Portfolio
Aggressive Growth Portfolio
Vanguard Specialized Portfolios
INTERNATIONAL FUNDS
Vanguard International
 Growth Portfolio
Vanguard/Trustees' Equity Fund
International Portfolio


                                  INDEX FUNDS

Vanguard Index Trust
Total Stock Market Portfolio
500 Portfolio
Extended Market Portfolio
Growth Portfolio
Value Portfolio
Small Capitalization Stock Portfolio
Vanguard International Equity
 Index Fund
European Portfolio
Pacific Portfolio
Emerging Markets Portfolio
Vanguard Bond Index Fund
Vanguard Tax-Managed Fund
Vanguard Balanced Index Fund

                           [THE VANGUARD GROUP LOGO]

           Vanguard Financial Center    Valley Forge, Pennsylvania 19482
            New Account Information:    Shareholder Account Services:
                    1 (800) 662-7447    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.

                                   Q752-5/96

VANGUARD
CALIFORNIA
TAX-FREE FUND


SEMI-ANNUAL REPORT
May 31, 1996



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