VANGUARD OHIO TAX FREE FUND
N-30D, 1995-07-26
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<PAGE>   1

                               CHAIRMAN'S LETTER


DEAR SHAREHOLDER:


During the six months ended May 31, 1995--the first half of the fiscal year for
Vanguard State Tax-Free Portfolios--a fairly substantial decline in long-term
interest rates resulted in higher prices for long-term tax-exempt bonds. These
price increases pushed the six-month total returns (capital change plus income)
of all our Insured Longer-Term Portfolios well into double-digit territory.
While long rates declined during the past six months, shorter-term interest
rates actually increased marginally. In this environment, the yields of our
Money Market Portfolios increased nicely and remained comfortably ahead of the
yields offered by comparable funds.

THE STATE INSURED LONG-TERM PORTFOLIOS

In the wake of repeated interest rate increases by the Federal Reserve
during 1994, long-term municipal bond yields peaked in November 1994 at 7.1%.
As these rate hikes seemed to slow the economy's growth, concerns about future
inflation were allayed, and rates began to decline. By the end of May,
municipal bond yields had fallen to 5.8%, a decline of 130 basis points.

       In this environment, longer-term municipal bond funds enjoyed
outstanding returns. Indeed, each of Vanguard's Insured Long-Term Portfolios
provided six-month total returns (capital change plus income) in the area of
+14%. This sharp price rally overwhelmed the negative returns of the prior six
months, bringing our total returns for the twelve months strongly into positive
territory. Although fluctuating net asset values are part and parcel of bond
fund investing, the recent swings in market value demonstrate the benefit of
remaining committed to a long-term investment strategy.

       The table opposite shows the Longer-Term Portfolios' twelve-month
returns, reflecting a full year's income. To provide some perspective on how
fluctuating interest rates have impacted our Insured Longer-Term Portfolios
over this period, the table breaks down our Portfolios' total returns into
their income and capital components. I would emphasize that the table conceals
the fact that the full period was composed of two vastly different six-month
sub-periods, one in which returns were sharply negative, the other strongly
positive.

<TABLE>                                                               
<CAPTION>                                                             
                                                                            
- ---------------------------------------------------------------------------
                                             Investment Returns       
                                            Twelve Months Ended       
                                                 May 31,1995          
                                  -----------------------------------------
Insured Longer-Term Portfolio     Income           Capital            Total
- ---------------------------------------------------------------------------
<S>                               <C>               <C>               <C>
CALIFORNIA INTERMEDIATE-TERM      +5.2%             +2.2%             +7.4%
CALIFORNIA LONG-TERM              +6.1              +3.8              +9.9
NEW YORK LONG-TERM                +6.0              +3.0              +9.0
PENNSYLVANIA LONG-TERM            +6.2              +2.1              +8.3
NEW JERSEY LONG-TERM              +6.0              +3.5              +9.5
OHIO LONG-TERM                    +5.9              +3.2              +9.1
FLORIDA LONG-TERM                 +5.8              +3.6              +9.4
- --------------------------------------------------------------------------
</TABLE>                                                              
                                                                      
The current tax-exempt yields on our Insured Longer-Term Portfolios are
presently in the area of 5.2%, compared with 6.3% six months ago. The yield for
each Portfolio is presented in the table on page 3 of this report, which also
includes per share net asset values, dividends, and total returns over the past
six and twelve months.

THE STATE MONEY MARKET PORTFOLIOS

As noted earlier, the Federal Reserve Board has remained relatively
tight-fisted in its monetary policy during the past six months, bringing some
stability to money market yields. This stability is a stark contrast to fiscal
1994, when the Board raised the Fed funds rate (at which banks borrow from one
another) on fully six separate occasions. It would appear that the Fed's tough
policy is bearing fruit: inflation so far remains quite subdued, and business
activity has slowed to a more normal growth rate.

       While rates have been stable in recent months, the table below shows the
impact of the dramatic surge in short-term rates on our annualized yields over
the past year and one-half. You will note that, during this period, the yields
on our Money Market Portfolios have risen by more than 60%.

<TABLE>              
<CAPTION>            
                                                                        
- -------------------------------------------------------------------------
                                    Seven-Day Annualized Yield
                        -------------------------------------------------
Money Market            May 31,      Nov. 30,       May 31,      Nov. 30,
Portfolio                1995          1994          1994          1993
- -------------------------------------------------------------------------
<S>                      <C>           <C>           <C>           <C>
CALIFORNIA               3.8%          3.4%          2.6%          2.3%
PENNSYLVANIA             3.8           3.5           2.6           2.3
NEW JERSEY               3.7           3.3           2.5           2.2
OHIO                     3.9           3.5           2.6           2.4
- -------------------------------------------------------------------------
                                                              (continued)
</TABLE>                     




                                       1
<PAGE>   2
Regardless of future interest rate movements, the yield advantage of our
Vanguard State Money Market Portfolios is virtually certain to remain
attractive relative to other comparable money market funds. The principal
reason for this advantage, as you know, is that our operating expenses are so
much lower than industry norms. Our Portfolios, for example, operate at an
annual expense ratio of about 0.2%, compared with 0.6% for our average
competitor. This advantage of 0.4% carries directly to the bottom line: the
yield you receive. Thus, in a market in which gross yields are, say, 4.0%, our
Portfolios should provide a net yield of 3.8%, compared with 3.4% for other
comparable money market portfolios.

       I want to underscore that our higher yields do not arise from the
ownership of lower quality money market instruments. The quality of our
Portfolios is, we believe, as high as any tax-exempt money market fund in the
field. Funds which stinted on quality last year ran the risk that their net
asset values might fall below the $1.00 value that investors have come to take
for granted. Our focus on quality--along with, we acknowledge, some good
luck--spared us the consequences of this risk, and we owned no direct
obligations of Orange County, California, the most troubled credit of the
period. Each of our Money Market Portfolios' net asset values remained at $1.00
per share, which as you know, is our objective, but is not guaranteed.

IN SUMMARY

The recent swings in total returns we have witnessed help to demonstrate that
"staying the course"--even in the face of turbulent markets-- will more often
than not lead to a successful long-term investment program. In contrast,
attempting to jump into and out of mutual funds in hopes of timing the
movements of the market is almost certain to result in failure.

       Whether rates remain volatile or not, the benefits of investing in
Vanguard State Tax-Free Portfolios endure: high quality, low cost, and
professional management. Along with these advantages, the Portfolios distribute
income that is 100% exempt from both Federal and state income taxes.  Together,
these factors should ensure our ability to provide shareholders with efficient
and effective Portfolios in the years to come.

       I look forward to reporting to you on our results for the full year in
our 1995 Annual Report six months hence.

Sincerely,


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

June 9, 1995

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





                                       2
<PAGE>   3
A FEW WORDS ABOUT POSSIBLE CHANGES IN THE TAX LAW

The uncertainties related to a variety of new tax proposals seem to have
unnerved some participants in the tax-exempt bond market. Of the options which
have been considered, perhaps the most significant to municipal bond investors
is the "flat tax." Indeed, under one proposed version, municipal bond yields
would have no advantage over taxable yields. Because of this uncertainty, the
rise in municipal bond prices has been significantly less than the rise in U.S.
Treasury bond prices over the past few months.

       As a result, the current yield on high-quality long-term municipal bonds
is 94% of the yield on taxable U.S. Treasuries giving municipal bonds their
largest after-tax yield advantage in recent years. What this means is that an
investor in the highest marginal tax bracket (40%) would earn an after-tax
yield of about 3.8% on a U.S. Treasury bond (60% of 6.4%). A high-grade
municipal bond, on the other hand, would provide a tax-exempt yield of
6.0%--fully 58% higher. Thus, it would appear that tax uncertainty has created
unusual yield opportunity.

       In any event, the flat tax option is no longer high on the legislative
agenda, and neither of the tax bills adopted by the Senate or the House of
Representatives would disturb the existing tax-exempt status of municipal bond
interest. Until the details of any tax law changes become clearer, we would
caution municipal bond investors to give careful consideration before making
any shifts in their holdings of municipal bonds. In the meantime, we will keep
you abreast of our views on the possible effects of any proposed legislation
that could materially impact the tax status of your holdings in Vanguard
municipal bond funds.

<TABLE>             
<CAPTION>           
    
- ----------------------------------------------------------------------------------------------------------------------------------
                                                           Net Asset Value       
                            Total                               Per Share              Dividends          Total Return
                       Net Assets                         ------------------      -----------------     ----------------
                       (millions)     Average   Average   Nov. 30,   May 31,       Six       Twelve      Six      Twelve    Current
Portfolio            May 31, 1995    Maturity  Quality*    1994       1995        Months     Months     Months    Months    Yield**
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>         <C>          <C>      <C>       <C>           <C>        <C>        <C>        <C>        <C>
MONEY MARKET                                                                       
  CALIFORNIA. . . . . .  $1,114       24 DAYS     MIG 1    $  1.00   $  1.00       $.019      $.033      + 1.9%     +3.3%      3.80%
  PENNSYLVANIA  . . . .   1,148       26 DAYS     MIG 1       1.00      1.00        .018       .033      + 1.9      +3.3       3.80
  NEW JERSEY  . . . . .     818       51 DAYS     MIG 1       1.00      1.00        .018       .032      + 1.8      +3.2       3.71
  OHIO  . . . . . . . .     166       60 DAYS     MIG 1       1.00      1.00        .019       .033      + 1.9      +3.4       3.92
- ------------------------------------------------------------------------------------------------------------------------------------
INSURED LONG-TERM                                                                  
  CALIFORNIA                                                                         
    INTERMEDIATE-TERM .  $  171     6.6 YEARS     Aaa      $  9.64   $ 10.26       $.253      $.499      + 9.2%     +7.4%      4.86%
  CALIFORNIA  . . . . .     936    12.7 YEARS     Aaa         9.92     11.06        .301       .606      +14.7      +9.9       5.29
  NEW YORK  . . . . . .     799    11.1 YEARS     Aaa         9.70     10.80        .293       .587      +14.5      +9.0       5.18
  PENNSYLVANIA. . . . .   1,482    12.8 YEARS     Aaa        10.07     11.08        .308       .625      +13.2      +8.3       5.28
  NEW JERSEY  . . . . .     742    10.5 YEARS     Aaa        10.40     11.57        .316       .628      +14.4      +9.5       5.12
  OHIO  . . . . . . . .     175     9.5 YEARS     Aaa        10.28     11.43        .307       .611      +14.3      +9.1       5.22
  FLORIDA   . . . . . .     362    13.1 YEARS     Aaa         9.61     10.75        .281       .562      +14.9      +9.4       5.27
- ------------------------------------------------------------------------------------------------------------------------------------
</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.
    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
                          AVERAGE ANNUAL TOTAL RETURNS


THE CURRENT YIELDS NOTED IN THE CHAIRMAN'S LETTER ARE CALCULATED IN ACCORDANCE
WITH SEC GUIDELINES. THE AVERAGE ANNUAL TOTAL RETURNS FOR THE PORTFOLIOS
(PERIODS ENDED MARCH 31, 1995) 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      +6.72%       --        +5.61%        +4.96%      +0.65%
CALIFORNIA INSURED LONG-TERM                      4/7/86      +8.14        +8.33%    +7.75         +6.55       +1.20
CALIFORNIA MONEY MARKET                           6/1/87      +3.09        +3.47     +4.18         +4.18        0.00
NEW YORK INSURED TAX-FREE                         4/7/86      +7.84        +8.72     +7.30         +6.54       +0.76
PENNSYLVANIA INSURED LONG-TERM                    4/7/86      +7.54        +8.73     +8.04         +6.75       +1.29
PENNSYLVANIA MONEY MARKET                        6/13/88      +3.04        +3.52     +4.19         +4.19        0.00
NEW JERSEY INSURED LONG-TERM                      2/3/88      +8.06        +8.69     +8.57         +6.55       +2.02
NEW JERSEY MONEY MARKET                           2/3/88      +2.96        +3.48     +4.17         +4.17        0.00
OHIO INSURED LONG-TERM                           6/18/90      +7.57          --      +8.80         +6.08       +2.72
OHIO MONEY MARKET                                6/18/90      +3.08          --      +3.44         +3.44        0.00
FLORIDA INSURED TAX-FREE                          9/1/92      +8.74          --      +7.68         +5.44       +2.24
</TABLE>

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

PLEASE NOTE THAT AN INVESTMENT IN A MONEY MARKET FUND, SUCH AS 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.





                                       4
<PAGE>   5
                       REPORT FROM THE INVESTMENT ADVISER


Two significant events occurred during the first six months of the fiscal year.
The first was the stunning market rally that drove long-term municipal yields
approximately -1.1 percentage points lower. The second was the turmoil
surrounding the bankruptcy of Orange County, California.

MONEY MARKETS

The aggressive tightening of monetary policy by the Federal Reserve Board in
1994 slowed down dramatically in the first half of fiscal year 1995. The only
intervention occurred on February 1, 1995, when the Federal Reserve Board
increased the discount and Federal funds rates 0.5%.  Participants in the
short-term municipal market reacted favorably to this relative stability in
interest rates and 1-year notes rallied roughly +1%. While yields on 1-year
notes declined, yields on shorter-term variable rate instruments moved in the
opposite direction, resulting in what is known as a flattening of the
short-term municipal yield curve. The average weighted maturities of the
Portfolios were positioned at the lower end of their maturity spectrum, and
consequently benefited from this flattening. During the fiscal half, the
average monthly yield on all non-institutional state-specific money funds rose
+0.78%.

       In the upcoming months, increased supply of short-term municipal
issuance should present an opportunity for our Money Market Portfolios to
extend their average maturities, but not at the expense of sacrificing quality.

BOND MARKETS

For the first half of the fiscal year, investors pushed long-term interest
rates lower as economic indices pointed increasingly to slower domestic
economic growth. Investors viewed the slowing as beneficially affecting
inflation. Long-term interest rates declined for virtually the entire six
months. For example, the benchmark 30-year U.S. Treasury bond began the fiscal
year yielding 8.0%, and by the end of May, the yield had fallen -1.4% to 6.6%.
Long-term tax-exempt bond yields followed suit, however, not in quite the same
magnitude as the taxable market. The Bond Buyer 20 Municipal Bond Index yield
declined -1.1% (from 6.9% to 5.8%) over the same period.

       The Florida, New Jersey, New York, Ohio, California, and Pennsylvania
Insured Long-Term Portfolios performed well over the six-month period. The
Portfolios benefited from an extension in their average weighted maturity that
began in the fourth quarter of the last fiscal year. Additionally, the
Portfolios' structure, with superior protection from early calls, aided in
maintaining the price responsiveness of the Portfolios during the market rally.

       Looking ahead there are three main strategies that we expect to pursue
regarding the management of the money invested in the Florida, New Jersey, New
York, Ohio, California, and Pennsylvania Insured Long-Term Portfolios. The
first is a continued focus on improvements in call protection to enhance the
durability of dividends; second is investing to minimize taxable capital gains
distributions when it does not interfere with superior total return potential;
and third is a focus on higher coupon bonds that would position the Portfolios
more defensively should interest rates reverse direction and move higher.

ORANGE COUNTY

During the afternoon of December 1, 1994, reports began to appear in the media
that Orange County, California, had experienced massive losses from its
investment pool in the range of $1.5 billion. Several days later, a news
conference convened by county officials confirmed the losses. On December 6,
acting to prevent creditors from forcing the county to become insolvent, the
officials filed for bankruptcy protection under Chapter 9 of the Federal
Bankruptcy Code. This was the first municipal bankruptcy filing by a major
government since the Great Depression. So far, there have been no major
defaults on bonds by the county or the other 187 government pool participants
(mainly from Orange County). However, if plans for a financial rescue of the
County are not completed before the end of June 1995, a series of defaults
could occur which would rival the $2.5 billion default by the Washington Public
Power Supply System in 1984. Importantly, Vanguard has no direct exposure to
losses stemming from Orange County.

       How this debacle happened is still being discussed and investigated. The
County Treasurer used reverse repurchase agreements to leverage the





                                       5
<PAGE>   6
portfolio to roughly three times the value of the underlying investments. He
then invested about a quarter of the pool in exotic derivative securities which
had coupons that reset inversely to changes in interest rates. As rates rose
rapidly during 1994, the portfolio suffered massive unrealized market value
losses. Orange County was not the only jurisdiction to have experienced massive
investment losses in 1994.  Highly publicized, but less serious problems
occurred in the investments of the State of Wisconsin, Cuyahoga County (Ohio),
and Odessa (Texas) Junior College District. As a result, state and local
government investments, investment policies, and investment oversight will be
more carefully scrutinized in the future.

       Nevertheless, the aftershock of the bankruptcy extended well beyond the
boundaries of California, and consequently, all municipal money market funds
experienced its effects. The immediate reaction in the short-term municipal
market resulted in a rise in yields of +0.75 percentage points on all general
market notes. Orange County Tax and Revenue Anticipation Notes, and any related
credits, faced a much more severe crisis with virtually no bid for these
securities. Since then, liquidity for general market notes has returned, and
yields have rallied through their December levels. However, illiquidity
persists for Orange County investors as bondholders negotiate payment on the
notes that are due in July.

       The Orange County bankruptcy underscores the benefit of the additional
layer of credit protection provided by the AAA-rated insurance policies
attached to the bonds that are owned by the State Insured Long-Term Portfolios.
As the bankruptcy story unfolded, most uninsured Orange County investment pool
related bonds were illiquid. In contrast, while insured Orange County related
bonds underperformed other insured bonds by three points, the insured market
was liquid. By late December, much of that underperformance had disappeared,
and at the end of the fiscal half, insured Orange County related bonds were
trading at prices just slightly lower than other insured bonds.

CONCLUSION

The Orange County bankruptcy has reinforced our commitment to rigorous credit
evaluation of the municipal securities in which we invest. This conservative
approach to assessing credit quality combined with Vanguard's low expenses
provides a high-quality investment that is exempt from both Federal and state
income taxes.

Respectfully,

Ian A. MacKinnon
Senior Vice President

Jerome J. Jacobs
Vice President

Pamela W. Tynan
Vice President

David E. Hamlin
Assistant Vice President

Reid O. Smith
Assistant Vice President

Danine A. Mueller
Portfolio Manager

Vanguard Fixed Income Group

June 14, 1995





                                       6
<PAGE>   7
                                                            FINANCIAL STATEMENTS
                                                                     (unaudited)
                                                                    May 31, 1995

                            STATEMENT OF NET ASSETS

<TABLE>
<CAPTION>
                                                              Face                      Market
                                                            Amount                       Value
INSURED LONG-TERM PORTFOLIO                                  (000)                      (000)+
- ----------------------------------------------------------------------------------------------
<S>                                                      <C>                       <C>
MUNICIPAL BONDS (100.5%)                                                                     
- ---------------------------------------------------------------------------------------------
ISSUER INSURED (83.0%)
   Adams County School Dist. GO
     5.55%, 12/1/09 (1)                                  $   1,000                 $     1,013
   Akron Bath & Copley Joint Township
     (Children's Hosp. Medical Center)
     5.50%, 1/1/08 (2)                                       1,000                       1,016
   Allen County GO
     5.30%, 12/1/15 (2)                                      1,250                       1,212
   Bedford Heights GO
     5.65%, 12/1/14 (2)                                        500                         504
   Big Walnut School Dist. GO
     5.70%, 6/1/14 (2)                                       1,000                       1,014
   Butler County Sewer System Rev.
     6.25%, 12/1/12 (2)                                      2,925                       3,060
   City of Canton GO
     5.375%, 12/1/07 (2)                                     1,000                       1,012
     (Waterworks System)
     5.75%, 12/1/10 (2)                                      1,000                       1,012
     5.85%, 12/1/15 (2)                                      1,000                       1,011
   Chillicothe GO
     6.05%, 12/1/12 (2)                                        675                         697
   Clermont County
     (Mercy Health System)
     5.40%, 9/1/05 (2)                                       2,500                       2,555
     5.50%, 9/1/06 (2)                                       2,500                       2,555
   Cleveland Airport System Rev.
     7.25%, 1/1/20 (1)                                         750                         826
   Cleveland GO
     5.30%, 9/1/08 (2)                                       4,500                       4,500
     5.375%, 9/1/09 (2)                                      2,000                       1,997
     5.375%, 9/1/10 (2)                                      1,000                         989
     5.375%, 9/1/12 (2)                                      1,000                         983
   Cleveland Public Power System Rev.
     7.00%, 11/15/24 (1)                                     2,500                       2,879
   Cleveland School Dist. GO
     0.00%, 12/1/05 (3)                                        700                         410
     0.00%, 12/1/06 (3)                                        700                         386
     0.00%, 12/1/07 (3)                                        500                         259
     0.00%, 12/1/08 (3)                                        400                         194
     5.875%, 12/1/11 (3)                                     1,500                       1,531
   Cleveland Water Works Rev.
     5.50%, 1/1/13 (1)                                       2,125                       2,104
     5.50%, 1/1/21 (1)                                       1,500                       1,478
     6.25%, 1/1/15 (2)                                       4,500                       4,694
   Columbus City School Dist. GO
     7.00%, 12/1/00 (3) (Prere.)                             1,750                       1,979
   Cuyahoga County Hosp. Rev.
     (Metro Health System)
     6.00%, 2/15/19 (1)                                      1,000                       1,009
     (Univ. Hosp. Health System)
     6.875%, 1/15/19 (6)                                     1,825                       1,967
   Dayton Water System Rev.
     6.75%, 12/1/10 (1)                                      1,000                       1,067
   Delaware City School Dist. GO
     5.20%, 12/1/16 (3)                                      1,500                       1,429
   Delaware Sewer System Rev.
     5.95%, 11/15/12 (2)                                     1,500                       1,526
   Dublin School Dist. GO
     0.00%, 12/1/05 (3)                                      1,220                         709
     0.00%, 12/1/06 (3)                                      1,220                         668
   Fairfield County Hosp. Rev. GO
     5.375%, 6/15/15 (1)                                     3,000                       2,902
   Franklin County Convention Center Rev.
     0.00%, 12/1/07 (1)                                      4,355                       2,235
     7.00%, 12/1/00 (1)(Prere.)                                675                         763
   Franklin County Hosp. Facilities Rev.
     (Riverside United Methodist)
     7.25%, 5/15/20 (1)                                        750                         835
   Hamilton County
     (Children's Hosp.)
     5.20%, 5/15/09 (1)                                      2,000                       1,959
   Hamilton County Sewer System Rev.
     5.25%, 12/1/16 (3)                                      2,000                       1,916
     5.40%, 12/1/08 (3)                                      5,700                       5,749
     5.45%, 12/1/09 (3)                                      3,250                       3,263
   Hamilton Gas System Rev.
     5.15%, 10/15/13 (1)                                     2,750                       2,652
   Hamilton Water System Rev.
     6.30%, 10/15/21 (1)                                     2,000                       2,084
   Hilliard County School Dist. GO
     5.75%, 12/1/19 (3)                                      2,000                       2,012
     6.55%, 12/1/05 (3)                                        500                         557
   Kettering City School Dist. GO
     5.30%, 12/1/14 (3)                                      1,350                       1,316
   Lima Sewer Rev.
     6.30%, 12/1/12 (2)                                      5,000                       5,341
   Lima Water Rev.
     6.30%, 12/1/12 (2)                                      3,400                       3,632
   Lisbon School Dist.
     6.25%, 12/1/17 (2)                                      1,000                       1,047
   Lucas County GO
     6.95%, 12/1/11 (1)                                      1,800                       1,994
   Mahoning County Hosp. Rev.
     Improvement Project (YHA Inc.)
     6.50%, 10/15/14 (1)                                     2,500                       2,665
   Marietta City School Dist.
     5.75%, 12/1/07 (2)                                      1,500                       1,557
   Marysville GO
     5.55%, 12/1/13 (2)                                      1,400                       1,403
</TABLE>


                                      7
<PAGE>   8



                      STATEMENT OF NET ASSETS (continued)


<TABLE>
<CAPTION>
                                                              Face                      Market
                                                            Amount                       Value
                                                             (000)                      (000)+
- ----------------------------------------------------------------------------------------------
<S>                                                      <C>                       <C>
   Marysville Water System Rev.
     7.05%, 12/1/01 (1)(Prere.)                          $   1,250                 $     1,426
   Medina City School Dist. GO
     6.20%, 12/1/18 (3)                                      2,100                       2,178
   Montgomery County Sewer System Rev.
     5.60%, 9/1/11 (3)                                       1,000                       1,008
   Mount Vernon Sewer System Rev.
     6.00%, 12/1/12 (2)                                        750                         773
   New Philadelphia City School Dist.
     6.25%, 12/1/17 (2)                                      2,300                       2,398
   North Canton GO
     5.90%, 12/1/14 (2)                                      2,000                       2,046
   Northeast Ohio Sewer Dist. Rev.
     6.50%, 11/15/16 (2)                                     2,500                       2,656
   Ohio Air Quality Development Auth.
     (Ohio Edison)
     7.10%, 6/1/18 (3)                                       1,000                       1,106
     7.45%, 3/1/16 (3)                                         500                         558
   Ohio Building Auth.
     (Transportation Facilities)
     7.00%, 9/1/07 (1)                                         850                         943
   Ohio Higher Education Facilities Rev.
     (Univ. of Dayton)
     5.80%, 12/1/14 (3)                                      1,000                       1,012
     6.60%, 12/1/17 (3)                                      1,000                       1,090
     6.75%, 12/1/15 (3)                                      1,000                       1,102
   Ohio Univ. General Receipts
     5.00%, 12/1/13 (3)                                      2,000                       1,878
   Ohio Water Development Auth.
     5.50%, 12/1/11 (2)                                      1,000                         997
   Olmsted Falls City School Dist. GO
     5.85%, 2/15/17 (3)                                      2,000                       2,033
     6.85%, 2/15/11 (3)                                        565                         638
   Omega Municipal Electric
     5.375%, 2/15/13 (2)                                     2,000                       1,967
   Ottowa GO
     7.00%, 9/1/11 (2)                                         500                         559
   Pickerington GO
     5.80%, 12/1/09 (3)                                        500                         519
   Revere School Dist. GO
     6.00%, 12/1/16 (2)                                      3,850                       3,962
   Reynoldsburg School Dist. GO
     6.55%, 12/1/17 (3)                                      1,600                       1,733
   Springfield GO
     6.875%, 9/1/10 (2)                                      1,000                       1,107
   Summit County GO
     6.90%, 8/1/12 (2)                                       2,500                       2,764
   Trumbull County Rev.
     (Trumbull Memorial Hosp.)
     6.25%, 11/15/12 (3)                                     2,000                       2,092
   Trumbull County GO
     5.30%, 12/1/14 (2)                                      1,500                       1,459
   Univ. of Toledo
     5.75%, 12/1/12 (3)                                      1,000                       1,012
   Wood County Justice Center GO
     5.95%, 12/1/07 (2)                                      1,750                       1,846
   Woodridge School Dist. GO
     6.00%, 12/1/19 (2)                                      1,000                       1,024
     6.80%, 12/1/14 (2)                                      2,000                       2,322
   Wooster City School Dist. GO
     6.50%, 12/1/17 (2)                                      2,500                       2,719
OUTSIDE OHIO:
   Puerto Rico Public Building 
   Auth. Rev.
   0.00%, 7/1/01 (3)                                           850                         634
                                                                                   -----------
        GROUP TOTAL                                                                    145,688
                                                                                   -----------
- ----------------------------------------------------------------------------------------------
SECONDARY MARKET INSURED (1.3%)
   Franklin (Mount Carmel Health)
     6.75%, 6/1/19 (1)                                       2,000                       2,176
                                                                                   -----------
- ----------------------------------------------------------------------------------------------
NON-INSURED (16.2%)
   Cincinnati Student Loan Funding
   Corp. VRDO
   3.60%, 6/7/95                                             2,300                       2,300
   Columbus Electric VRDO
     4.30%, 7/3/95 (LOC)                                     2,500                       2,500
   Columbus Sewer VRDO
     3.80%, 6/8/95                                           3,000                       3,000
   Cuyahoga County Hosp.
     Improvement VRDO
     (St. Luke's Hosp.)
     3.90%, 6/7/95 (LOC)                                     1,300                       1,300
   Franklin County Solid Waste
     4.10%, 8/25/95                                          2,000                       2,000
   Independence Ohio BAN
     4.25%, 9/8/95                                           2,100                       2,100
   Ohio Air Quality Development
     Auth. VRDO
     (Mead Corp.)
     4.15%, 6/2/95 (LOC)                                       800                         800
   Ohio GO
     7.625%, 8/1/10                                          3,510                       4,307
   Ohio Higher Education
     Facilities Auth. Rev.
     (Case Western Reserve Univ.)
     6.50%, 10/1/20                                            250                         281
     (Oberlin College)
     5.375%, 10/1/15                                         1,500                       1,433
   Ohio Public Facilities Comm.
     (Mental Health Facilities)
     4.25%, 6/1/96                                           3,000                       3,001
</TABLE>




                                       8
<PAGE>   9



<TABLE>
<CAPTION>
                                                              Face                      Market
                                                            Amount                       Value
                                                             (000)                      (000)+
- ----------------------------------------------------------------------------------------------
<S>                                                     <C>                       <C>
   Ohio Water Development
     Auth. VRDO
     (Mead Corp.)
     4.15%, 6/2/95 (LOC)                                $      620                $        620
   Scioto County VRDO
     (Norfolk Southern Corp.)
     3.65%, 6/7/95                                             400                         400
   Toledo Notes
     5.25%, 5/2/96 (LOC)                                     3,000                       3,030
   Univ. of Cincinnati BAN
     4.75%, 8/30/95                                          1,000                       1,001
OUTSIDE OHIO:
   Puerto Rico Govt. Development Bank
     VRDO 3.45%, 6/7/95 (LOC)                                  400                         400
                                                                                    -----------
        GROUP TOTAL                                                                     28,473
                                                                                    -----------
- -----------------------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
 (Cost $169,084)                                                                       176,337
- -----------------------------------------------------------------------------------------------
 OTHER ASSETS AND LIABILITIES (-.5%)                                                         
- -----------------------------------------------------------------------------------------------
   Other Assets--Note B                                                                  3,655
   Liabilities                                                                          (4,518)
                                                                                    -----------
                                                                                          (863)
- -----------------------------------------------------------------------------------------------
NET ASSETS (100%)
- -----------------------------------------------------------------------------------------------
   Applicable to 15,353,245 outstanding
     shares of beneficial interest
     (unlimited authorization--no par value)                                          $175,474
- -----------------------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                               $11.43
===============================================================================================
</TABLE>
+See Note A to Financial Statements.
For explanations of abbreviations and other references, see page 10.

<TABLE>
<CAPTION>
                                                                                             
- ----------------------------------------------------------------------------------------------
AT MAY 31, 1995, NET ASSETS CONSISTED OF:                                                    
- ----------------------------------------------------------------------------------------------
                                                          Amount                           Per
                                                           (000)                         Share
                                                        --------                        ------
<S>                                                     <C>                             <C>
Paid in Capital                                         $168,557                        $10.98 
Undistributed Net Investment Income                           --                            -- 
Accumulated Net Realized Losses                              (78)                         (.01) 
Unrealized Appreciation of Investments--Note D             6,995                           .46
- ---------------------------------------------------------------------------------------------- 
NET ASSETS                                              $175,474                        $11.43
- ---------------------------------------------------------------------------------------------- 
</TABLE>

<TABLE>
<CAPTION>
                                                             Face                       Market
                                                           Amount                        Value
MONEY MARKET PORTFOLIO                                      (000)                       (000)+
- ----------------------------------------------------------------------------------------------
MUNICIPAL BONDS (98.7%)                                                                      
- ---------------------------------------------------------------------------------------------
  <S>                                                 <C>                         <C>
  Akron Sewer System VRDO
    3.85%, 6/7/95 (LOC)                               $      300                  $        300
  Butler County BAN
    4.73%-4.88%, 11/29/95-4/19/96                          4,695                         4,711
    GO 5.07%, 3/15/96                                      1,700                         1,706
  Butler County Sewer BAN
    4.74%, 4/19/96                                         1,700                         1,706
  Cincinnati Student Loan VRDO
    3.60%, 6/7/95 (LOC)                                    5,500                         5,500
  Clark County BAN
    4.37%, 10/5/95                                         1,800                         1,801
  Cleveland--Cuyahoga County Port
    Auth. VRDO
    (Rock & Roll Hall of Fame)
    3.85%, 6/7/95 (LOC)                                    5,000                         5,000
  Cleveland Heights City BAN
    4.15%, 9/1/95                                          2,000                         2,001
  Cleveland Waterworks
    Improvement TOB VRDO
    4.10%, 6/8/95 (1)                                      9,560                         9,560
  Columbus Electric VRDO
    4.30%, 7/3/95 (LOC)                                   12,740                        12,740
  Columbus GO VRDO
    3.85%, 6/8/95                                          3,000                         3,000
  Columbus Sewer Rev. VRDO
    3.80%, 6/8/95                                          7,400                         7,400
  Cuyahoga County Hosp.
    Improvement VRDO
    (St. Luke's Hosp.)
    3.90%, 6/7/95 (LOC)                                   13,395                        13,395
  Euclid City GO BAN
    4.24%-4.47%, 9/29/95                                   4,140                         4,143
  Franklin County Hosp. Rev. VRDO
    (Holy Cross Health System)
    4.15%, 6/8/95                                          6,600                         6,600
  Franklin County Solid Waste
    4.10%, 8/25/95                                         4,000                         4,001
  Hamilton County BAN
  5.00%, 5/10/96                                           2,459                         2,470
  Hamilton County Metropolitan
    Sewer TOB VRDO
    4.10%, 6/8/95 (3)                                      3,340                         3,340
  Hillard BAN
    4.75%, 10/5/95                                           375                           376
  Huber Heights GO BAN
    5.00%, 4/1/96                                          1,600                         1,607
  Kings Local School Dist. BAN
    5.45%, 6/21/95                                         2,500                         2,501
  Lake County BAN
    4.15%, 7/27/95                                         1,000                         1,000
</TABLE>

                                       9
<PAGE>   10


                      STATEMENT OF NET ASSETS (continued)


<TABLE>
<CAPTION>
                                                            Face                         Market
                                                          Amount                          Value
                                                           (000)                         (000)+
- -----------------------------------------------------------------------------------------------
<S>                                                    <C>                         <C>
  Medina County GO BAN
    4.75%, 10/12/95                                    $   2,220                   $     2,223
  Montgomery County Hosp.
    Facilities CP
    (Miami Valley Hosp.)
    4.25%, 7/10/95 (LOC)                                   1,000                         1,000
  Montgomery County Sewer GO
    5.00%, 10/27/95                                        5,135                         5,153
  Ohio Air Quality Development
    Auth. VRDO
    (Mead Corp.)
    4.15%, 6/2/95 (LOC)                                    4,600                         4,600
  Ohio Higher Education
    Facilities TOB VRDO
    4.056%, 6/1/95 (2)                                     6,000                         6,000
  Ohio State Univ. VRDO
    4.00%, 6/8/95                                          5,550                         5,550
  Ohio Water Development
    Auth. VRDO
    TOB 4.15%, 6/8/95 (2)                                  5,000                         5,000
    (Mead Corp.)
    4.15%, 6/2/95 (LOC)                                    5,300                         5,300
    (Timpken)
    3.65%, 6/7/95 (LOC)                                    5,000                         5,000
  Scioto County VRDO
    (Norfolk Southern Corp.)
    3.65%, 6/7/95                                         11,600                        11,600
  Summit County BAN
    5.00%, 3/7/96                                          1,580                         1,584
  Toledo Notes
    4.80%, 7/27/95 (LOC)                                   2,500                         2,502
    5.25%, 5/2/96                                          1,000                         1,007
  Univ. of Cincinnati GO BAN
    4.75%-5.00%, 8/30/95-3/21/96                           7,400                         7,416
OUTSIDE OHIO:
  Puerto Rico Electric Power Auth.
    9.00%, 7/1/95 (Prere.)                                 4,750                         4,908
- -----------------------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
 (Cost $163,701)                                                                       163,701
- -----------------------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (1.3%)
- -----------------------------------------------------------------------------------------------
 Other Assets--Note B                                                                    2,615
 Liabilities                                                                              (474)
                                                                                   ------------
                                                                                         2,141
- -----------------------------------------------------------------------------------------------
NET ASSETS (100%)                                                                            
- -----------------------------------------------------------------------------------------------
 Applicable to 165,845,937 outstanding
  shares of beneficial interest
  (unlimited authorization--no par value)                                             $165,842
- -----------------------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                                $1.00
===============================================================================================
</TABLE>
+See Note A to Financial Statements.

<TABLE>
<CAPTION>
                                                                                             
- ---------------------------------------------------------------------------------------------
AT MAY 31, 1995, NET ASSETS CONSISTED OF:                                                    
- ---------------------------------------------------------------------------------------------
                                                          Amount                           Per
                                                           (000)                         Share
                                                        --------                         -----
<S>                                                     <C>                              <C>
  Paid in Capital                                       $165,850                         $1.00
  Undistributed Net
    Investment Income                                         --                            --
  Accumulated Net
    Realized Losses                                           (8)                           --
  Unrealized Appreciation of
    Investments                                               --                            --
- ----------------------------------------------------------------------------------------------
NET ASSETS                                              $165,842                         $1.00
- ----------------------------------------------------------------------------------------------
</TABLE>
BAN=Bond Anticipation Note
COP=Certificate of Participation
CP=Commercial Paper
GO=General Obligation
PCR=Pollution Control Revenue
RAN=Revenue Anticipation Note
TAN=Tax Anticipation Note
TOB=Tender Option Bond
TRAN=Tax Revenue Anticipation Note
VRDO=Variable Rate Demand Obligation
(Prere.)=Prerefunded
*Put Option Obligation.

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.





                                      10
<PAGE>   11
                            STATEMENT OF OPERATIONS


<TABLE>
<CAPTION>
                                                                INSURED LONG-TERM                             MONEY MARKET
                                                                        PORTFOLIO                                PORTFOLIO
- --------------------------------------------------------------------------------------------------------------------------
                                                                 Six Months Ended                         Six Months Ended
                                                                     May 31, 1995                             May 31, 1995
                                                                            (000)                                    (000)
- --------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>             <C>                    <C>                 <C>
INVESTMENT INCOME
   INCOME
      Interest      . . . . . . . . . . . . . . . .                      $  4,699                                   $3,100
- --------------------------------------------------------------------------------------------------------------------------
               Total Income   . . . . . . . . . . .                         4,699                                    3,100
- --------------------------------------------------------------------------------------------------------------------------
   EXPENSES
      The Vanguard Group--Note B
        Investment Advisory Services  . . . . . . .      $   10                                 $   10
        Management and Administrative   . . . . . .         128                                    122
        Marketing and Distribution  . . . . . . . .          19               157                   21                 153
                                                         ------                                 ------                    
      Auditing Fees   . . . . . . . . . . . . . . .                             4                                        3
      Shareholders' Reports   . . . . . . . . . . .                             8                                        5
      Annual Meeting and Proxy Costs  . . . . . . .                             1                                        1
- --------------------------------------------------------------------------------------------------------------------------
               Total Expenses   . . . . . . . . . .                           170                                      162
- --------------------------------------------------------------------------------------------------------------------------
                 Net Investment Income  . . . . . .                         4,529                                    2,938
- --------------------------------------------------------------------------------------------------------------------------
REALIZED NET GAIN (LOSS)
      Investment Securities Sold  . . . . . . . . .                           199                                       --
      Futures Contracts   . . . . . . . . . . . . .                          (457)                                      --
- --------------------------------------------------------------------------------------------------------------------------
                 Realized Net Loss  . . . . . . . .                          (258)                                      --
- --------------------------------------------------------------------------------------------------------------------------
CHANGE IN UNREALIZED APPRECIATION
   (DEPRECIATION)
      Investment Securities   . . . . . . . . . . .                        16,923                                       --
      Futures Contracts   . . . . . . . . . . . . .                            27                                       --
- --------------------------------------------------------------------------------------------------------------------------
               Change in Unrealized
                 Appreciation (Depreciation)  . . .                         16,950                                      --
- --------------------------------------------------------------------------------------------------------------------------
               Net Increase in Net Assets
                 Resulting from Operations  . . . .                        $21,221                                  $2,938
==========================================================================================================================
</TABLE>




                                      11
<PAGE>   12
                       STATEMENT OF CHANGES IN NET ASSETS


<TABLE> 
<CAPTION>
                                                                          INSURED LONG-TERM                            MONEY MARKET
                                                                                  PORTFOLIO                               PORTFOLIO
- -----------------------------------------------------------------------------------------------------------------------------------
                                                      SIX MONTHS ENDED           Year Ended     SIX MONTHS ENDED         Year Ended
                                                               MAY 31,         November 30,              MAY 31,       November 30,
                                                                  1995                 1994                 1995               1994
                                                                 (000)                (000)                (000)              (000)
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                        <C>                   <C>                 <C>                <C>
INCREASE (DECREASE) IN NET ASSETS                                                                                    
OPERATIONS                                                                                                           
  Net Investment Income   . . . . . . . . . . . . .        $    4,529            $    8,876          $    2,938         $    3,523
  Realized Net Gain (Loss)  . . . . . . . . . . . .              (258)                  897                  --                 (5)
  Change in Unrealized Appreciation                                                                                  
    (Depreciation)  . . . . . . . . . . . . . . . .            16,950               (20,587)                 --                 --
- ----------------------------------------------------------------------------------------------------------------------------------
    Net Increase (Decrease) in Net Assets                                                                            
      Resulting from Operations   . . . . . . . . .            21,221               (10,814)              2,938              3,518
- ----------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS (1)                                                                                                    
  Net Investment Income   . . . . . . . . . . . . .            (4,529)               (8,876)             (2,938)            (3,523)
  Realized Net Gain . . . . . . . . . . . . . . . .                --                  (462)                 --                 --
- ----------------------------------------------------------------------------------------------------------------------------------
    Total Distributions   . . . . . . . . . . . . .            (4,529)               (9,338)             (2,938)            (3,523)
- ----------------------------------------------------------------------------------------------------------------------------------
CAPITAL SHARE TRANSACTIONS (2)                                                                                       
  Issued    -- Regular  . . . . . . . . . . . . . .            15,967                35,213              79,238            105,947
            -- In Lieu of Cash Distributions  . . .             3,296                 6,873               2,755              3,286
            -- Exchange   . . . . . . . . . . . . .            13,255                17,949              18,736             41,136
  Redeemed  -- Regular  . . . . . . . . . . . . . .           (10,846)              (27,595)            (58,326)           (94,221)
            -- Exchange   . . . . . . . . . . . . .           (11,410)              (30,244)            (23,820)           (40,486)
- ----------------------------------------------------------------------------------------------------------------------------------
    Net Increase from                                                                                                
      Capital Share Transactions  . . . . . . . . .            10,262                 2,196              18,583             15,662
- ----------------------------------------------------------------------------------------------------------------------------------
    Total Increase (Decrease)   . . . . . . . . . .            26,954              (17,956)              18,583             15,657
- ----------------------------------------------------------------------------------------------------------------------------------
NET ASSETS                                                                                                           
  Beginning of Period   . . . . . . . . . . . . . .           148,520               166,476             147,259            131,602
- ----------------------------------------------------------------------------------------------------------------------------------
  End of Period   . . . . . . . . . . . . . . . . .          $175,474              $148,520            $165,842           $147,259
==================================================================================================================================
  (1) Distributions Per Share                                                                                        
      Net Investment Income   . . . . . . . . . . .             $.307                 $.599               $.019              $.026
      Realized Net Gain   . . . . . . . . . . . . .                --                 $.032                  --                 --
- ----------------------------------------------------------------------------------------------------------------------------------
  (2) Shares Issued and Redeemed                                                                                     
      Issued  . . . . . . . . . . . . . . . . . . .             2,663                 4,731              97,974            147,083
      Issued in Lieu of Cash Distributions  . . . .               298                   619               2,755              3,286
      Redeemed  . . . . . . . . . . . . . . . . . .            (2,050)               (5,248)            (82,146)          (134,707)
- ----------------------------------------------------------------------------------------------------------------------------------
                                                                  911                   102              18,583             15,662
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
        
        
        


                                       12
<PAGE>   13
                              FINANCIAL HIGHLIGHTS


<TABLE>                                                                  
<CAPTION>                                                                
                                                                             INSURED LONG-TERM PORTFOLIO
- ---------------------------------------------------------------------------------------------------------------------------------
                                                                                   Year Ended November 30,             June 18 to
                                                    SIX MONTHS ENDED        ----------------------------------------     Nov. 30,
For a Share Outstanding Throughout Each Period          MAY 31, 1995        1994         1993        1992       1991         1990
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                                                          <C>          <C>          <C>         <C>        <C>          <C>
NET ASSET VALUE, BEGINNING OF PERIOD. . . . . .               $10.28      $11.61       $11.07      $10.60     $10.30       $10.00
                                                              ------      ------       ------      ------     ------       -------
INVESTMENT OPERATIONS                                                                                         
   Net Investment Income. . . . . . . . . . . .                 .307        .599         .608        .630       .650         .295
   Net Realized and Unrealized Gain (Loss)                                                                    
      on Investments. . . . . . . . . . . . . .                1.150      (1.298)        .685        .474       .300         .300
                                                              ------      ------       ------      ------     ------       -------
         TOTAL FROM INVESTMENT OPERATIONS . . .                1.457       (.699)       1.293       1.104       .950         .595
- ----------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS                                                                                                 
   Dividends from Net Investment Income . . . .               (.307)       (.599)       (.608)      (.630)     (.650)       (.295)
   Distributions from Realized Capital Gains. .                  --        (.032)       (.145)      (.004)        --           --
                                                              ------      ------       ------      ------     ------       -------
         TOTAL DISTRIBUTIONS. . . . . . . . . .               (.307)       (.631)       (.753)      (.634)     (.650)       (.295)
- ----------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD. . . . . . . . .               $11.43      $10.28       $11.61      $11.07     $10.60       $10.30
==================================================================================================================================
TOTAL RETURN. . . . . . . . . . . . . . . . . .              +14.32%      -6.29%      +12.03%     +10.69%     +9.50%       +6.04%
- ----------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA                                                                                      
- ------------------------                                                                                      
Net Assets, End of Period (Millions). . . . . .                 $175        $149         $166        $101        $61          $17
Ratio of Expenses to Average Net Assets . . . .                .21%*        .23%         .21%        .31%       .27%        .22%*
Ratio of Net Investment Income to . . . . . . .                                                               
   Average Net Assets . . . . . . . . . . . . .               5.60%*       5.38%        5.29%       5.77%      6.20%       6.55%*
Portfolio Turnover Rate . . . . . . . . . . . .                  7%*         16%          10%         27%        20%           2%
- ----------------------------------------------------------------------------------------------------------------------------------
*Annualized.
</TABLE>  
          
          



                                      13
<PAGE>   14
                        FINANCIAL HIGHLIGHTS (continued)


<TABLE>
<CAPTION>
                                                                               MONEY MARKET PORTFOLIO
- --------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                   
                                                                                     Year Ended November 30,          June 18 to
                                                          SIX MONTHS ENDED      -----------------------------------     Nov. 30, 
For a Share Outstanding Throughout Each Period                MAY 31, 1995      1994       1993      1992      1991         1990
- ---------------------------------------------------------------------------------------------------------------------------------
<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  . . . . . . . . . . . . . . . . .           .019      .026       .023      .030      .045         .027
   Net Realized and Unrealized Gain (Loss)
      on Investments  . . . . . . . . . . . . . . . . . . .             --        --         --        --        --           --
                                                                     ------    ------     ------    ------    ------       ------
         TOTAL FROM INVESTMENT OPERATIONS   . . . . . . . .           .019      .026       .023      .030      .045         .027
- ---------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
   Dividends from Net Investment Income   . . . . . . . . .          (.019)    (.026)     (.023)    (.030)    (.045)       (.027)
   Distributions from Realized Capital Gains  . . . . . . .             --        --         --        --        --           --
                                                                     ------    ------     ------    ------    ------       ------
         TOTAL DISTRIBUTIONS  . . . . . . . . . . . . . . .          (.019)    (.026)     (.023)    (.030)    (.045)       (.027)
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . . . . . . . .          $1.00     $1.00      $1.00     $1.00     $1.00        $1.00
=================================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . . . . . . . .         +1.91%    +2.58%     +2.37%    +3.01%    +4.64%       +2.59%
- ---------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- ------------------------
Net Assets, End of Period (Millions)  . . . . . . . . . . .           $166      $147       $132       $92       $79          $37
Ratio of Expenses to Average Net Assets . . . . . . . . . .          .21%*      .23%       .21%      .31%      .26%        .23%*
Ratio of Net Investment Income
   Average Net Assets   . . . . . . . . . . . . . . . . . .         3.69%*     2.56%      2.34%     2.95%     4.45%       5.65%*
Portfolio Turnover Rate . . . . . . . . . . . . . . . . . .            N/A       N/A        N/A       N/A       N/A          N/A
- ---------------------------------------------------------------------------------------------------------------------------------
*Annualized.
</TABLE>



                         NOTES TO FINANCIAL STATEMENTS


Vanguard Ohio 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
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 Ohio.

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
    valued at amortized cost which approximates market value.  Insured
    Long-Term Portfolio: 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





                                       14
<PAGE>   15
    income. Accordingly, no provision for Federal income taxes is required in 
    the financial statements.

3.  FUTURES: The Insured Long-Term Portfolio utilizes 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 Portfolio may purchase futures contracts instead of 
    municipal bonds when futures contracts are believed to be priced more 
    attractively than municipal bonds. The Portfolio 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 Portfolio 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, Inc. furnishes at cost investment advisory, corporate 
management, administrative, marketing and distribution services. The costs of 
such services are allocated to the Fund under methods approved by the Board of 
Trustees. At May 31, 1995, the Fund had contributed capital of $46,000 to 
Vanguard (included in Other Assets), representing .2% of Vanguard's 
capitalization. The Fund's officers and trustees are also officers and
directors of Vanguard.

C.  During the six months ended May 31, 1995, the Insured Long-Term Portfolio 
made purchases of $13,439,000 and sales of $4,931,000 of investment securities 
other than temporary cash investments.

At November 30, 1994, the Insured Long-Term Portfolio had available a capital
loss carryforward of $105,000 to offset future net capital gains through
November 30, 2002.

D.  At May 31, 1995, unrealized appreciation of investment securities of the 
Insured Long-Term Portfolio for financial reporting and Federal income tax 
purposes aggregated $7,253,000, of which $7,749,000 related to appreciated
securities and $496,000 related to depreciated securities.

At May 31, 1995, the Insured Long-Term Portfolio had short positions in
Municipal Bond Index futures contracts expiring in June 1995, with an aggregate
settlement value and net unrealized depreciation of $6,606,000 and $258,000.
The market value of securities deposited as initial margin for open futures
contracts was $554,000.





                                       15
<PAGE>   16
                          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/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 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


                                    [LOGO]
<TABLE>
<S>                                        <C>
Vanguard Financial Center                  Valley Forge, Pennsylvania 19482

New Account Information:                   Shareholder Account Services: 
        1-(800) 662-7447                   1-(800) 662-2739
</TABLE>

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.
                                      
                                   Q962-5/95



VANGUARD
OHIO
TAX-FREE FUND



SEMI-ANNUAL REPORT
MAY 31, 1995


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