VANGUARD INDEX TRUST
497, 1997-05-19
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<PAGE>   1
 
================================================================================
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                                   FORM N-1A
                   REGISTRATION STATEMENT (NO. 2-56846) UNDER
                           THE SECURITIES ACT OF 1933
                          PRE-EFFECTIVE AMENDMENT NO.
                        POST-EFFECTIVE AMENDMENT NO. 47
                                      AND
 
              REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY
                                  ACT OF 1940
                                AMENDMENT NO. 49
                              VANGUARD INDEX TRUST
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
 
                     P.O. BOX 2600, VALLEY FORGE, PA 19482
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)
 
                  REGISTRANT'S TELEPHONE NUMBER (610) 669-1000
 
                         RAYMOND J. KLAPINSKY, ESQUIRE
                                  P.O. BOX 876
                             VALLEY FORGE, PA 19482
 
              IT IS PROPOSED THAT THIS AMENDMENT BECOME EFFECTIVE
         60 days after filing pursuant to paragraph (a)(1) of Rule 485.
 
                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:
  As soon as practicable after this Registration Statement becomes effective.
 
     WE HAVE ELECTED TO REGISTER AN INDEFINITE NUMBER OF SHARES PURSUANT TO
REGULATION 24f-2 UNDER THE INVESTMENT COMPANY ACT OF 1940. REGISTRANT FILED ITS
RULE 24f-2 NOTICE FOR THE YEAR ENDED DECEMBER 31, 1996 ON FEBRUARY 19, 1997.
 
================================================================================
<PAGE>   2
 
                              VANGUARD INDEX TRUST
 
                             CROSS REFERENCE SHEET
   
<TABLE>
<CAPTION>
FORM N-1A
ITEM NUMBER                                                           LOCATION IN PROSPECTUS
<C>           <S>                                              <C>
    Item 1.   Cover Page....................................   Cover Page
    Item 2.   Synopsis......................................   Fund & Trust Expenses
    Item 3.   Condensed Financial Information...............   Financial Highlights
    Item 4.   General Description of Registrant.............   Investment Objectives; Investment
                                                               Limitations; Investment Policies;
                                                               Investment Risks; General Information
    Item 5.   Management of the Fund........................   Management and Investment Advisory
                                                               Services
   Item 5A.   Management's Discussion of Fund Performance...   Herein incorporated by reference to
                                                               Registrant's Annual Report to
                                                               Shareholders dated December 31, 1996
                                                               filed with the Securities & Exchange
                                                               Commission's EDGAR system on March
                                                               11, 1997
    Item 6.   Capital Stock and Other Securities............   Opening an Account and Purchasing
                                                               Shares; Selling Shares; The Share
                                                               Price of the Fund and Each Portfolio;
                                                               Dividends, Capital Gains and Taxes;
                                                               General Information
    Item 7.   Purchase of Securities Being Offered..........   Opening an Account and Purchasing
                                                               Shares; Exchanging Shares; Exchange
                                                               Privilege Limitations
    Item 8.   Redemption or Repurchase......................   Selling Shares
    Item 9.   Pending Legal Proceedings.....................   Not Applicable
 
<CAPTION>
FORM N-1A                                                              LOCATION IN STATEMENT
ITEM NUMBER                                                          OF ADDITIONAL INFORMATION
<C>           <S>                                              <C>
   Item 10.   Cover Page....................................   Cover Page
   Item 11.   Table of Contents.............................   Cover Page
   Item 12.   General Information and History...............   Not Applicable
   Item 13.   Investment Objectives and Policies............   Investment Objectives and Policies;
                                                               Investment Limitations
   Item 14.   Management of the Registrant..................   Management of the Trust
   Item 15.   Control Persons and Principal Holders of
              Securities....................................   Not Applicable
   Item 16.   Investment Advisory and Other Services........   Management of the Trust
   Item 17.   Brokerage Allocation and Other Services.......   Portfolio Transactions
   Item 18.   Capital Stock and Other Securities............   Description of Shares and Voting
                                                               Rights
   Item 19.   Purchase, Redemption and Pricing of Securities
              Being Offered.................................   Purchase of Shares; Redemption of
                                                               Shares
   Item 20.   Tax Status....................................   Not Applicable
   Item 21.   Underwriters..................................   Management of the Trust
   Item 22.   Calculation Performance Data..................   Yield and Total Return; Performance
                                                               Measures
   Item 23.   Financial Statements..........................   Financial Statements
</TABLE>
    
<PAGE>   3
                                                                     [FLAG LOGO]

   
                         C   O   M   B   I   N   E   D
    
                     P   R   O   S   P   E   C   T   U   S
 
   
                                  MAY 19, 1997
    
 
                                      
                            VANGUARD BOND INDEX FUND

                          VANGUARD BALANCED INDEX FUND

                              VANGUARD INDEX TRUST

                    VANGUARD INTERNATIONAL EQUITY INDEX FUND

                     VANGUARD TOTAL INTERNATIONAL PORTFOLIO

 


                             [VANGUARD GROUP LOGO]
<PAGE>   4
 
================================================================================
COMBINED PROSPECTUS -- MAY 19, 1997                Members of The Vanguard Group
================================================================================
 
NEW ACCOUNT INFORMATION: INVESTOR INFORMATION DEPARTMENT -- 1-800-662-7447
(SHIP)
- --------------------------------------------------------------------------------
 
SHAREHOLDER ACCOUNT SERVICES: CLIENT SERVICES DEPARTMENT -- 1-800-662-2739
(CREW)
- --------------------------------------------------------------------------------
 
   
INVESTMENT
OBJECTIVES AND
POLICIES            The Vanguard index funds offered in this prospectus are four
                    separate, individual open-end diversified investment
                    companies. These include: Vanguard Bond Index Fund, Inc.
                    (the Total Bond Market, Short-Term Bond, Intermediate-Term
                    Bond and Long-Term Bond Portfolios); Vanguard Balanced Index
                    Fund, Inc.; Vanguard Index Trust (the 500, Extended Market,
                    Total Stock Market, Small Capitalization Stock, Value and
                    Growth Portfolios); and Vanguard International Equity Index
                    Fund, Inc. (the European, Pacific and Emerging Markets
                    Portfolios). The Total International Portfolio, which is
                    also discussed in this prospectus, is part of Vanguard STAR
                    Fund, an open-end non-diversified investment company. Each
                    of the Portfolios invests in securities (bonds or common
                    stocks) in order to match the investment performance of a
                    distinct market index.
    
- --------------------------------------------------------------------------------
 
   
OPENING AN
ACCOUNT             To open a regular (non-retirement) account, please complete
                    and return the Account Registration Form. If you need
                    assistance in completing this Form, please call our Investor
                    Information Department. To open an Individual Retirement
                    Account (IRA), please use a Vanguard IRA Adoption Agreement.
                    To obtain a copy of this form, call 1-800-662-7447, Monday
                    through Friday, from 8:00 a.m. to 9:00 p.m. and Saturday,
                    from 9:00 a.m. to 4:00 p.m. (Eastern time). The minimum
                    initial investment for each Portfolio is $3,000 or $1,000
                    for Uniform Gifts/Transfers to Minors Act accounts. Each of
                    the Funds assesses a $10 annual account maintenance fee.
                    Certain Vanguard index funds deduct a portfolio transaction
                    fee from share purchases or share redemptions. The fee on
                    share purchases is .05% for the Extended Market, Small
                    Capitalization Stock and Pacific Portfolios. For the
                    European, Total International and Emerging Markets
                    Portfolios, the fee on share purchases is 1%, 0.75% and
                    1.5%, respectively. The Emerging Markets Portfolio, but not
                    the other Vanguard index funds, also deducts a 1% portfolio
                    transaction fee from share redemptions. Portfolio
                    transaction fees are paid to the Portfolios to offset
                    transaction costs of buying and selling securities of small-
                    and medium-sized companies and international companies. See
                    "Fund Expenses."
    
 
   
                    Note to Large Investors: Through a separate prospectus, the
                    Total Bond Market Portfolio of Vanguard Bond Market Fund
                    offers a separate, institutional class of shares for certain
                    investors investing $10 million or more. For a copy of the
                    Portfolio's Institutional Shares prospectus, please call
                    Vanguard's Institutional Investor Services Department at
                    1-800-523-8066.
    
- --------------------------------------------------------------------------------
 
   
ABOUT THIS
PROSPECTUS          This Prospectus is designed to set forth concisely the
                    information you should know about the Portfolios before you
                    invest. It should be retained for future reference.
                    "Statements of Additional Information" containing additional
                    information about each of the Vanguard index funds have been
                    filed with the Securities and Exchange Commission. These
                    Statements have been incorporated by reference into this
                    Prospectus. A copy may be obtained without charge by writing
                    to the Portfolios or by calling our Investor Information
                    Department.
    
- --------------------------------------------------------------------------------
 
TABLE OF CONTENTS
 
   
<TABLE>
<S>                          <C>       <C>                          <C>       <C>                          <C>
Highlights.................    2       Implementation of                      SHAREHOLDER GUIDE
Fund Expenses..............    5       Policies...................   35       Opening an Account and
Financial Highlights.......    8       Investment Limitations.....   45       Purchasing Shares..........     52
Yield and Total Return.....   17       Management of the Funds....   46       When Your Account Will
                                       Investment Advisers........   47
FUND INFORMATION                       Dividends, Capital Gains               Be Credited................     57
Investment Objectives......   17       and Taxes..................   48       Selling Your Shares........     58
Investment Policies........   20       The Share Price of                     Exchanging Your Shares.....     61
Investment Risks...........   27       Each Portfolio.............   50       Important Information About
Who Should Invest..........   31       General Information........   50       Telephone Transactions.....     63
                                                                              Transferring                    
                                                                              Registration...............     63
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE COMMISSION PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
- --------------------------------------------------------------------------------
<PAGE>   5
 
                                   HIGHLIGHTS
 
   
                         Vanguard offers a total of fifteen separate index
                         portfolios or funds ("Portfolios"). Unlike other mutual
                         funds, which generally attempt to "beat" market
                         averages with often unpredictable results, the
                         Portfolios seek to "match" the performance of their
                         underlying indexes and thus are expected to provide
                         highly predictable returns relative to their
                         benchmarks. The Portfolios offer investors the
                         advantages of a "passive" approach to investing. These
                         include low investment costs, exceptional
                         diversification among securities, minimal portfolio
                         turnover, and relative predictability.
    
 
   
                         As with any mutual fund, there is no assurance that the
                         Portfolios will meet their objectives.
    
- --------------------------------------------------------------------------------
 
   
INVESTMENT
OBJECTIVES AND
POLICIES                 Vanguard Bond Index Fund, Vanguard Balanced Index Fund,
                         Vanguard Index Trust and Vanguard International Equity
                         Index Fund are each open-end diversified investment
                         companies designed as "index" funds. Vanguard Total
                         International Portfolio, also designed as an index
                         fund, is part of Vanguard STAR Fund, an open-end non-
                         diversified investment company.
    
 
   
VANGUARD BOND
INDEX FUND               The Fund consists of four Portfolios, each of which
                         invests in bonds.
    
 
                         - The TOTAL BOND MARKET PORTFOLIO seeks to replicate
                           the performance of the Lehman Brothers Aggregate Bond
                           Index.
                         - The SHORT-TERM BOND PORTFOLIO seeks to replicate the
                           performance of the Lehman Brothers Mutual Fund Short
                           (1-5) Government/ Corporate Index.
                         - The INTERMEDIATE-TERM BOND PORTFOLIO seeks to
                           replicate the performance of the Lehman Brothers
                           Mutual Fund Intermediate (5-10) Government/Corporate
                           Index.
                         - The LONG-TERM BOND PORTFOLIO seeks to replicate the
                           performance of the Lehman Brothers Mutual Fund Long
                           (10+) Government/Corporate Index.
 
   
                         Each Portfolio will invest at least 80% of its assets
                         in securities included in its respective index. The
                         Lehman Brothers Indexes encompass two major classes of
                         investment grade fixed income securities: U.S. Treasury
                         and agency securities and corporate bonds.
                         Additionally, the Lehman Brothers Aggregate Bond Index
                         includes mortgage-backed securities.            PAGE 17
    
  ------------------------------------------------------------------------------
 
   
VANGUARD BALANCED
INDEX FUND               The Fund invests in common stocks and bonds. It seeks
                         to replicate with respect to 60% of its assets the
                         performance of the Wilshire 5000 Equity Index and with
                         respect to 40% of its assets, the Lehman Brothers
                         Aggregate Bond Index. Under normal circumstances the
                         Fund will invest primarily in securities of its
                         underlying indexes.                             PAGE 17
    
  ------------------------------------------------------------------------------
 
   
VANGUARD INDEX TRUST     The Trust consists of six separate Portfolios, each of
                         which invests in U.S. common stocks.
    
 
   
                         - The 500 PORTFOLIO seeks to replicate the performance
                           of the S&P 500 Composite Stock Price Index.
    
   
                         - The EXTENDED MARKET PORTFOLIO seeks to replicate the
                           performance of the Wilshire 4500 Equity Index.
    
 
                                        2
<PAGE>   6
 
   
                         - The TOTAL STOCK MARKET PORTFOLIO seeks to replicate
                           the performance of the Wilshire 5000 Equity Index.
    
                         - The SMALL CAPITALIZATION STOCK PORTFOLIO seeks to
                           replicate the performance of the Russell 2000 Small
                           Stock Index.
                         - The VALUE PORTFOLIO seeks to replicate the
                           performance of the S&P/BARRA Value Index.
   
                         - The GROWTH PORTFOLIO seeks to replicate the
                           performance of the S&P/BARRA Growth Index.    PAGE 18
    
  ------------------------------------------------------------------------------
 
VANGUARD
INTERNATIONAL
EQUITY INDEX FUND        The Fund consists of three Portfolios each of which
                         invests in international common stocks.
 
                         - The EUROPEAN PORTFOLIO seeks to parallel the
                           performance of the Morgan Stanley Capital
                           International -- Europe (Free) Index.
   
                         - The PACIFIC PORTFOLIO seeks to parallel the
                           performance of the Morgan Stanley Capital
                           International -- Pacific (Free) Index.
    
   
                         - The EMERGING MARKETS PORTFOLIO seeks to parallel the
                           performance of the Morgan Stanley Capital
                           International -- Select Emerging (Free) Markets Free
                           Index.
    
 
   
                         The European Portfolio and the Pacific Portfolio invest
                         primarily in the common stocks included in their
                         respective indexes. The Emerging Markets Portfolio
                         invests 95% of its assets in securities which are
                         representative of securities in its index and 5% in
                         cash reserves.                                  PAGE 19
    
  ------------------------------------------------------------------------------
 
   
VANGUARD
TOTAL INTERNATIONAL
PORTFOLIO                The Total International Portfolio seeks to match the
                         performance of the Morgan Stanley Capital
                         International -- Europe, Australia, and Far East +
                         Select Emerging Markets (Free) Index.           PAGE 19
    
- --------------------------------------------------------------------------------
 
INVESTMENT
RISKS                    The Portfolios of the Vanguard Bond Index Fund and the
                         bond portion of the Vanguard Balanced Fund are subject
                         to risks associated with fixed income investing
                         including interest rate, income, call and credit risks.
                         Additionally, since the Total Bond Market Portfolio of
                         Vanguard Bond Index Fund invests in mortgage-backed
                         securities, the Portfolio is subject to prepayment
                         risk.
 
   
                         The equity portion of Vanguard Balanced Index Fund,
                         Vanguard Index Trust, Vanguard International Equity
                         Index Fund and Vanguard Total International Portfolio
                         are subject to stock market risk, which is the
                         possibility that common stock prices will decline over
                         short or extended periods. Both U.S. and foreign stock
                         markets tend to be cyclical, with periods when stock
                         prices generally rise and periods when stock prices
                         generally decline. Additionally, Vanguard International
                         Equity Index Fund and Vanguard Total International
                         Portfolio are subject to currency risk, the risk that
                         changes in foreign exchange rates will affect the value
                         of foreign securities held by the Portfolios.
    
 
                         Investors considering the Emerging Markets Portfolio
                         should be aware that emerging markets can be
                         substantially more volatile than both U.S. and more
                         developed foreign markets. Volatility in emerging
                         markets can be exacerbated by illiquidity in the market
                         for emerging market stocks.
 
                                        3
<PAGE>   7
 
   
                         Because of the risks associated with common stocks and
                         bonds, the Portfolios are intended to be long-term
                         investment vehicles and are not designed to provide
                         investors with a means of speculating on short-term
                         market movements. Investors should not consider an
                         investment in any one portfolio a complete investment
                         program, but should maintain holdings of securities
                         with different risk characteristics -- including U.S.
                         common stocks, bonds and money market instruments. For
                         further information concerning the risks associated
                         with investing in the Portfolios, see "Investment
                         Risks".                                         PAGE 27
    
- --------------------------------------------------------------------------------
 
   
THE VANGUARD
GROUP                    The investment companies to which the Portfolios belong
                         are members of The Vanguard Group of Investment
                         Companies, a group of more than 30 investment companies
                         with more than 90 distinct investment portfolios and
                         total assets in excess of $250 billion. The Vanguard
                         Group, Inc. ("Vanguard"), a subsidiary jointly owned by
                         the Vanguard Funds, provides all corporate management,
                         administrative, distribution and shareholder accounting
                         services on an at-cost basis to the Funds in the
                         Group.                                          PAGE 46
    
- --------------------------------------------------------------------------------
 
   
INVESTMENT
ADVISERS                 The Vanguard Bond Index Fund and the bond portion of
                         Vanguard Balanced Index Fund receive investment
                         advisory services from Vanguard's Fixed Income Group.
                         Vanguard Index Trust, Vanguard International Equity
                         Index Fund, Vanguard Total International Portfolio, and
                         the equity portion of Vanguard Balanced Index Fund
                         receive investment advisory services from Vanguard's
                         Core Management Group. All investment advisory services
                         are provided to the Index Funds on an at-cost basis. As
                         a result, the Funds receive investment advisory
                         services at a substantially lower cost than would be
                         possible if the Funds paid an investment advisory fee
                         to an external investment adviser.              PAGE 47
    
- --------------------------------------------------------------------------------
 
   
FEES AND EXPENSES        Certain Portfolios impose transaction fees on share
                         purchases or redemptions:
    
 
   
<TABLE>
<CAPTION>
                                                                                    FEE DEDUCTED
                                                                  FEE DEDUCTED          FROM
                                                                 FROM PURCHASES     REDEMPTIONS
                           <S>                                   <C>              <C>
                           VANGUARD INDEX TRUST
                           Extended Market Portfolio                   0.5%             None
                           Small Capitalization Stock Portfolio        0.5%             None
                           VANGUARD INTERNATIONAL EQUITY INDEX
                             FUND
                           European Portfolio                            1%             None
                           Pacific Portfolio                           0.5%             None
                           Emerging Markets Portfolio                  1.5%               1%
                           TOTAL INTERNATIONAL PORTFOLIO              0.75%             None
</TABLE>
    
 
   
                         The Vanguard Bond Index Fund reserves the right to
                         impose a portfolio transaction fee on certain large
                         purchases. Portfolio transaction fees are paid directly
                         to the Portfolios to offset all transaction costs of
                         buying securities of small- and medium-sized companies
                         and international companies.                     PAGE 6
    
 
   
                         Each Portfolio charges a $10 annual account maintenance
                         fee for accounts with balances of less than
                         $10,000.                                        PAGE 53
    
- --------------------------------------------------------------------------------
 
                                        4
<PAGE>   8
 
   
FUND EXPENSES            The following table illustrates ALL expenses and fees
                         that you would incur as a shareholder of Vanguard Index
                         Trust, Vanguard Bond Index Fund, Vanguard International
                         Equity Index Fund and Vanguard Balanced Index Fund. The
                         expenses and fees set forth below are for the 1996
                         fiscal year.
    
 
   
<TABLE>
<CAPTION>
                                                                TOTAL                              SMALL
              SHAREHOLDER                           EXTENDED    STOCK                          CAPITALIZATION  BALANCED
              TRANSACTION                   500      MARKET    MARKET      VALUE     GROWTH        STOCK        INDEX
                EXPENSES                 PORTFOLIO  PORTFOLIO PORTFOLIO  PORTFOLIO  PORTFOLIO    PORTFOLIO+      FUND
      -----------------------------------------------------------------------------------------------------------------
<S>                                      <C>        <C>       <C>        <C>        <C>        <C>             <C>
Sales Load Imposed on Purchases.........    None      None*      None       None       None         None*        None
Sales Load Imposed on Reinvested
  Dividends.............................    None      None       None       None       None         None         None
Redemption Fees++.......................    None      None       None       None       None         None         None
Exchange Fees...........................    None      None       None       None       None         None         None
*    Shareholders are charged a 0.5% portfolio transaction fee, payable directly to the
     Portfolio, on each purchase of shares.
+    Formerly Vanguard Small Capitalization Stock Fund, Inc.
++   Wire redemptions of less than $5,000 are subject to a $5 processing fee.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                TOTAL                              SMALL
              ANNUAL FUND                           EXTENDED    STOCK                          CAPITALIZATION  BALANCED
               OPERATING                    500      MARKET    MARKET      VALUE     GROWTH        STOCK        INDEX
                EXPENSES                 PORTFOLIO  PORTFOLIO PORTFOLIO  PORTFOLIO  PORTFOLIO    PORTFOLIO+      FUND
      -----------------------------------------------------------------------------------------------------------------
<S>                                      <C>        <C>       <C>        <C>        <C>        <C>             <C>
Management & Administrative
  Expenses++............................    0.17%     0.21%      0.18%      0.16%      0.16%        0.21%        0.12%
Investment Advisory Fees................    0.00      0.00       0.00       0.00       0.00         0.00         0.01
12b-1 Fees..............................    None      None       None       None       None         None         None
Other Expenses
  Distribution Costs....................    0.02      0.02       0.02       0.02       0.02         0.02         0.02
  Miscellaneous Expenses................    0.01      0.02       0.02       0.02       0.02         0.02         0.05
                                         --------   --------  --------   --------   --------   -----------     --------
Total Other Expenses....................    0.03      0.04       0.04       0.04       0.04         0.04         0.07
                                         --------   --------  --------   --------   --------   -----------     --------
    TOTAL OPERATING EXPENSES............    0.20%     0.25%      0.22%      0.20%      0.20%        0.25%        0.20%
                                         ========   ========  ========   ========   ========   ===========     ========
+    Formerly Vanguard Small Capitalization Stock Fund, Inc.
++   In addition to these costs, each Portfolio assesses an annual account maintenance fee of
     $10. This fee will be waived for shareholders with an account balance of $10,000 or more.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                               TOTAL      SHORT-                     LONG-
         SHAREHOLDER           BOND        TERM     INTERMEDIATE-    TERM                           EMERGING      TOTAL
         TRANSACTION          MARKET       BOND       TERM BOND      BOND      EUROPEAN   PACIFIC   MARKETS   INTERNATIONAL
          EXPENSES           PORTFOLIO   PORTFOLIO    PORTFOLIO    PORTFOLIO   PORTFOLIO PORTFOLIO  PORTFOLIO   PORTFOLIO
- ----------------------------------------------------------------------------------------------------------------------------
<S>                             <C>        <C>          <C>         <C>         <C>        <C>       <C>         <C>
Sales Load Imposed on
  Purchases..................    None(1)    None(1)      None(1)      None(1)    None**     None*     None+        None(2)
Sales Load Imposed on
  Reinvested Dividends.......    None       None         None         None       None       None      None         None
Redemption Fees++............    None       None         None         None       None       None       1.0%***     None
Exchange Fees................    None       None         None         None       None       None      None         None
*    Shareholders are charged a 0.5% portfolio transaction fee, payable directly to the Portfolio
     on each purchase of shares.
**   Shareholders are charged a 1% portfolio transaction fee, payable directly to the Portfolio
     on each purchase of shares.
***  The 1.0% portfolio transaction fee withheld from redemption proceeds is paid to the
     Portfolio.
+    Shareholders are charged a 1.5% portfolio transaction fee, payable directly to the Portfolio
     on each purchase of shares.
++   Wire redemptions of less than $5,000 are subject to a $5 processing fee.
(1)  A portfolio transaction fee, payable directly to the Portfolio, may be imposed on purchases
     of $50 million or more for the Total Bond Market Portfolio; $15 million for the Short-Term
     and Intermediate-Term Bond Portfolios; and $2 million for the Long-Term Bond Portfolio. See
     Vanguard Bond Index Fund's Statement of Additional Information for further information.
(2)  Shareholders are charged a 0.75% portfolio transaction fee, payable directly to the
     Portfolio on each purchase of shares.
</TABLE>
    
 
                                        5
<PAGE>   9
 
   
<TABLE>
<CAPTION>
                                  TOTAL      SHORT-
          ANNUAL FUND             BOND        TERM     INTERMEDIATE-  LONG- TERM                      EMERGING      TOTAL
           OPERATING             MARKET       BOND       TERM BOND      BOND     EUROPEAN   PACIFIC   MARKETS   INTERNATIONAL
           EXPENSES             PORTFOLIO   PORTFOLIO    PORTFOLIO    PORTFOLIO  PORTFOLIO PORTFOLIO  PORTFOLIO   PORTFOLIO
- -----------------------------------------------------------------------------------------------------------------------------
<S>                             <C>         <C>        <C>            <C>        <C>       <C>        <C>       <C>
Management & Administrative
  Expenses***..................    0.14%       0.14%        0.14%        0.08%     0.26%      0.24%     0.23%        0.23%
Investment Advisory Fees.......    0.01        0.01         0.01         0.01      None       None      None         None
12b-1 Fees.....................    None        None         None         None      None       None      None         None
Other Expenses
  Distribution Costs...........    0.03        0.03         0.03         0.03      0.02       0.03      0.03         0.02
  Miscellaneous Expenses.......    0.02        0.02         0.02         0.08      0.07       0.08      0.34         0.11
                                --------    --------   ----------     --------   --------  --------   --------  -----------
Total Other Expenses...........    0.05        0.05         0.05         0.11      0.09       0.11      0.37         0.13
                                --------    --------   ----------     --------   --------  --------   --------  -----------
    TOTAL OPERATING
      EXPENSES.................    0.20%(1)    0.20%        0.20%        0.20%     0.35%      0.35%     0.60%        0.38%
                                ========    ========   ==========     ========   ========  ========   ========  ===========
*** In addition to these costs, each Portfolio assesses an annual account maintenance fee of $10. This fee will be waived for
    shareholders with an account balance of $10,000 or more.
(1) The Portfolio's Institutional Class of shares are offered at an estimated expense ratio of 0.10% per year.
</TABLE>
    
 
                         The purpose of this table is to assist you in
                         understanding the various costs and expenses that you
                         would bear directly or indirectly as an investor in the
                         Funds.
 
   
SIX PORTFOLIOS ASSESS
PURCHASE TRANSACTION
FEES                     Shares of Vanguard Index Trust -- Extended Market and
                         Small Capitalization Stock Portfolios and Vanguard
                         International Equity Index Fund -- Pacific Portfolio
                         are subject to a 0.5% transaction fee on purchases.
                         Shares of Vanguard International Equity Index Fund --
                         European Portfolio are subject to a 1% transaction fee
                         on purchases. Shares of Vanguard International Equity
                         Index Fund -- Emerging Markets Portfolio are subject to
                         a 1.5% transaction fee on purchases. Shares of the
                         Total International Portfolio are subject to a 0.75%
                         transaction fee on purchases. The portfolio transaction
                         fees are paid to the respective Portfolio, not to
                         Vanguard. They are not sales charges.
    
 
   
                         The Portfolios of Vanguard Bond Index Fund may assess
                         portfolio transaction fees on certain large purchases.
                         Please see the Shareholder Transaction Expense table
                         and the Fund's Statement of Additional Information for
                         more details.
    
 
                         These fees apply to initial investments in the
                         respective Portfolios and all subsequent purchases
                         (including purchases made by exchange from another
                         Vanguard Fund or from other Portfolios within a Fund),
                         but not to reinvested dividend or capital gains
                         distributions. Portfolio transaction fees are deducted
                         automatically from the amount invested; they cannot be
                         paid separately.
 
                         The purpose of these transaction fees is to allocate
                         transaction costs associated with new purchases to
                         investors making those purchases, thus insulating
                         existing shareholders from those transaction costs.
                         These costs include: (1) brokerage costs; (2) market
                         impact costs -- i.e., the increase in market prices
                         which may result when the Portfolio purchases thinly
                         traded stocks; and, most importantly, (3) the effect of
                         the "bid-ask" spread in the over-the-counter market.
                         (Securities in the over-the-counter market are bought
                         at the "ask" or purchase price, but are valued in the
                         Portfolio at the mean of the "bid" or sale, and "ask"
                         prices).
 
                                        6
<PAGE>   10
 
                         The fees represent Vanguard's estimate of the brokerage
                         and other transaction costs incurred by the Portfolios
                         in acquiring stocks in their respective markets.
                         Without the fees, the Portfolios, which incur these
                         costs directly, would experience reduced investment
                         performance for all shareholders in each Portfolio.
                         With the fees, the transaction costs of acquiring
                         additional stocks are borne not by all existing
                         shareholders, but by those investors making additional
                         purchases. Because the purchaser, not the Portfolios,
                         bears these costs, the Portfolios are expected to track
                         their respective benchmark indexes more closely.
 
   
THE EMERGING MARKETS
PORTFOLIO CHARGES A
1% REDEMPTION
TRANSACTION FEE          The Emerging Markets Portfolio of Vanguard
                         International Equity Index Fund also assesses a 1%
                         transaction fee on redemptions. This 1% charge applies
                         to redemptions or exchanges from the Portfolio. The 1%
                         fee is deducted from redemption or exchange proceeds
                         and is paid directly to the Portfolio, not to Vanguard.
                         It is not a contingent deferred sales charge.
    
 
   
EACH PORTFOLIO CHARGES
A $10 ACCOUNT
MAINTENANCE FEE          Each Portfolio assesses an annual account maintenance
                         fee of $10 to allocate part of the fixed costs of
                         maintaining shareholder accounts equally to all
                         accounts. This fee is deducted from each Portfolio's
                         dividend at a rate of $2.50 per quarter for accounts in
                         the 500, Total Stock Market, Value and Growth
                         Portfolios of Vanguard Index Trust, Vanguard Bond Index
                         Fund and Vanguard Balanced Index Fund. For accounts in
                         the Extended Market Portfolio of Vanguard Index Trust,
                         the European, Pacific and Emerging Markets Portfolios
                         of Vanguard International Equity Index Fund, and
                         Vanguard Total International Portfolio there is one $10
                         deduction per year. See "Dividends, Capital Gains and
                         Taxes" for more information on this fee. The $10 fee
                         amounts to 1.00% on a $1,000 investment in a Portfolio,
                         and 0.33% on a $3,000 investment. This fee will be
                         waived for shareholders with an account balance of
                         $10,000 or more.
    
 
   
                         The following example illustrates the expenses that you
                         would incur on a $1,000 investment over various time
                         periods, assuming (1) a 5% annual rate of return and
                         (2) redemption at the end of each period.
                         The $10 annual fee payable on accounts of less than
                         $10,000 is
                         not included.
    
 
   
<TABLE>
<CAPTION>
                                                            1         3         5         10
                                                           YEAR     YEARS     YEARS     YEARS
                                                           ---      ----      ----       ----
                        <S>                               <C>      <C>       <C>       <C>
                        Total Bond Market Portfolio.....   $  2      $ 6       $11       $ 26
                        Short-Term Bond Portfolio.......   $  2      $ 6       $11       $ 26
                        Intermediate-Term Bond
                          Portfolio.....................   $  2      $ 6       $11       $ 26
                        Long-Term Bond Portfolio........   $  2      $ 6       $11       $ 26
                        Balanced Index Fund.............   $  2      $ 6       $11       $ 26
                        500 Portfolio...................   $  2      $ 6       $11       $ 26
                        Extended Market Portfolio.......   $  8      $13       $19       $ 37
                        Total Stock Market Portfolio....   $  2      $ 7       $12       $ 28
                        Value Portfolio.................   $  2      $ 6       $11       $ 26
                        Growth Portfolio................   $  2      $ 6       $11       $ 26
                        Small Capitalization Stock
                          Portfolio.....................   $  8      $13       $19       $ 37
                        European Portfolio..............   $ 14      $21       $29       $ 54
                        Pacific Portfolio...............   $  9      $16       $25       $ 49
                        Emerging Markets Portfolio......   $ 31      $45       $60       $104
                        Total International Portfolio...   $ 11      $20       $29       $ 55
</TABLE>
    
 
                                        7
<PAGE>   11
 
   
                         THIS EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION
                         OF PAST OR FUTURE EXPENSES OR PERFORMANCE. ACTUAL
                         EXPENSES MAY BE HIGHER OR LOWER THAN THOSE SHOWN.
    
- --------------------------------------------------------------------------------
 
   
FINANCIAL
HIGHLIGHTS               The following financial highlights for a share
                         outstanding throughout each period, insofar as they
                         relate to each of the respective periods in the period
                         ended December 31, 1996, have been audited by Price
                         Waterhouse LLP, independent accountants, whose reports
                         thereon were unqualified. This financial information
                         should be read in conjunction with each Fund's
                         financial statements and notes thereto, which, together
                         with the remaining portions of each Fund's 1996 Annual
                         Report to Shareholders, are incorporated by reference
                         in the Statements of Additional Information and in this
                         Prospectus, and which appear, along with the reports of
                         Price Waterhouse LLP, in each Fund's 1996 Annual Report
                         to Shareholders and inserts thereto. For a more
                         complete discussion of each Fund's performance, please
                         see the 1996 Annual Report of each Fund, which may be
                         obtained free of charge by writing to the Funds or
                         calling our Investor Information Department at
                         1-800-662-7447.
    
 
   
<TABLE>
<CAPTION>
                              ---------------------------------------------------------------------------------------------------
                                                                  TOTAL BOND MARKET PORTFOLIO
                              ---------------------------------------------------------------------------------------------------
                                                                    YEAR ENDED DECEMBER 31,
                              ---------------------------------------------------------------------------------------------------
                               1996       1995       1994       1993      1992      1991      1990      1989      1988      1987
<S>                           <C>        <C>        <C>        <C>        <C>       <C>       <C>       <C>       <C>       <C>
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING 
 OF YEAR..................... $10.14      $9.17     $10.06      $9.88     $9.99     $9.41     $9.44     $9.05     $9.20     $9.94
                              ------     ------     ------      -----     -----     -----     -----     -----     -----     -----
INVESTMENT OPERATIONS
 Net Investment Income.......   .640       .650       .622       .638      .699      .766      .796      .797      .807      .834
 Net Realized and Unrealized
   Gain (Loss) on
   Investments...............  (.300)      .970      (.888)      .300     (.018)     .605     (.030)     .390     (.150)    (.740)
                              ------     ------     ------      -----     -----     -----     -----     -----     -----     -----
       TOTAL FROM INVESTMENT
        OPERATIONS...........   .340      1.620      (.266)      .938      .681     1.371      .766     1.187      .657      .094
- ---------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income.........  (.640)     (.650)     (.622)     (.638)    (.699)    (.766)    (.796)    (.797)    (.807)    (.834)
 Distributions from Realized
   Capital Gains.............     --         --      (.002)     (.120)    (.092)    (.025)       --        --        --        --
                              ------     ------     ------      -----     -----     -----     -----     -----     -----     -----
       TOTAL DISTRIBUTIONS...  (.640)     (.650)     (.624)     (.758)    (.791)    (.791)    (.796)    (.797)    (.807)    (.834)
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF
 PERIOD......................  $9.84     $10.14      $9.17     $10.06     $9.88     $9.99     $9.41     $9.44     $9.05     $9.20
=================================================================================================================================
TOTAL RETURN(1)..............   3.58%     18.18%     (2.66)%     9.68%     7.14%    15.25%     8.65%    13.65%     7.35%    1.14%
=================================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period
 (Millions).................. $2,962     $2,405     $1,731     $1,540     $1,066     $849      $277      $139       $58       $43
Ratio of Expenses to Average
 Net Assets..................   0.20%      0.20%      0.18%      0.18%     0.20%     0.16%     0.21%     0.24%     0.30%    0.14%
Ratio of Net Investment
 Income to Average Net
 Assets......................   6.54%      6.66%      6.57%      6.24%     7.06%     7.95%     8.60%     8.49%     8.84%    9.01%
Portfolio Turnover Rate......     39%        36%        33%        50%       49%       31%       29%       33%       21%      77%
 (1) Total return figures do not reflect the annual account maintenance fee of $10.
</TABLE>
    
 
                                        8
<PAGE>   12
 
   
<TABLE>
<CAPTION>
                                                                                 -------------------------------------------
                                                                                                 SHORT-TERM
                                                                                               BOND PORTFOLIO
                                                                                 -------------------------------------------
                                                                                 YEAR ENDED DECEMBER 31,
                                                                                 -----------------------        MAR. 1+, TO
                                                                                  1996             1995        DEC. 31, 1994
<S>                                                                              <C>              <C>          <C>
- ----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD...........................................  $10.07           $ 9.50          $ 10.00
                                                                                 ------           ------        ---------
INVESTMENT OPERATIONS
 Net Investment Income.........................................................    .587             .623             .463
 Net Realized and Unrealized Gain (Loss) on Investments........................   (.146)            .570            (.500)
                                                                                  -----            -----         --------
       TOTAL FROM INVESTMENT OPERATIONS........................................    .441            1.193            (.037)
- ----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income..........................................   (.587)           (.623)           (.463)
 Distributions from Realized Capital Gains.....................................   (.004)              --               --
                                                                                  -----            -----         --------
       TOTAL DISTRIBUTIONS.....................................................   (.591)           (.623)           (.463)
- ----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.................................................   $9.92           $10.07            $9.50
============================================================================================================================
TOTAL RETURN(1)................................................................    4.55%           12.88%           (0.37)%
============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)...........................................    $328             $208              $77
Ratio of Expenses to Average Net Assets........................................    0.20%            0.20%            0.18%*
Ratio of Net Investment Income to Average Net Assets...........................    5.93%            6.28%            5.77%*
Portfolio Turnover Rate........................................................      65%              65%              53%
   * Annualized.
 (1) Total return figures do not reflect the annual account maintenance fee of $10.
   + Subscription period for the Portfolio was from January 18, 1994, through February 28, 1994, during which time all
     assets were held in money market instruments.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                  ------------------------------------------
                                                                                               INTERMEDIATE-TERM
                                                                                                BOND PORTFOLIO
                                                                                  ------------------------------------------
                                                                                   YEAR ENDED DECEMBER 31,       MAR. 1+, TO
                                                                                  ------------------------        DEC. 31,
                                                                                    1996            1995            1994
<S>                                                                               <C>             <C>           <C>
- ----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.............................................   $10.37           $9.18         $ 10.00
                                                                                   -------         -------       ---------
INVESTMENT OPERATIONS
 Net Investment Income...........................................................     .648            .661            .533
 Net Realized and Unrealized Gain (Loss) on Investments..........................    (.406)          1.217           (.820)
                                                                                    ------          ------        --------
       TOTAL FROM INVESTMENT OPERATIONS..........................................     .242           1.878           (.287)
- ----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income............................................    (.648)          (.661)          (.533)
 Distributions from Realized Capital Gains.......................................    (.004)          (.027)             --
                                                                                    ------          ------        --------
       TOTAL DISTRIBUTIONS.......................................................    (.652)          (.688)          (.533)
- ----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD...................................................    $9.96          $10.37           $9.18
============================================================================================================================
TOTAL RETURN(1)..................................................................     2.55%          21.07%          (2.88)%
============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).............................................     $460            $346             $71
Ratio of Expenses to Average Net Assets..........................................     0.20%           0.20%           0.18%*
Ratio of Net Investment Income to Average Net Assets.............................     6.54%           6.55%           6.88%*
Portfolio Turnover Rate..........................................................       80%             71%             63%
   * Annualized.
 (1) Total return figures do not reflect the annual account maintenance fee of $10.
   + Subscription period for the Portfolio was from January 18, 1994, through February 28, 1994, during which time all
     assets were held in money market instruments.
</TABLE>
    
 
                                        9
<PAGE>   13
 
   
<TABLE>
<CAPTION>
                                                                                --------------------------------------------
                                                                                                   LONG-TERM
                                                                                                BOND PORTFOLIO
                                                                                --------------------------------------------
                                                                                 YEAR ENDED DECEMBER 31,         MAR. 1+, TO
                                                                                -------------------------         DEC. 31,
                                                                                  1996            1995              1994
<S>                                                                             <C>             <C>           <C>
- ----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD........................................     $ 10.82           $8.96           $ 10.00
                                                                                  ------          ------        ----------
INVESTMENT OPERATIONS
 Net Investment Income......................................................        .674            .692              .586
 Net Realized and Unrealized Gain (Loss) on Investments.....................       (.731)          1.884            (1.040)
                                                                                  ------          ------        ----------
       TOTAL FROM INVESTMENT OPERATIONS.....................................       (0.57)          2.576             (.454)
- ----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income.......................................       (.674)          (.692)            (.586)
 Distributions from Realized Capital Gains..................................       (.009)          (.024)               --
                                                                                  ------          ------        ----------
       TOTAL DISTRIBUTIONS..................................................       (.683)          (.716)            (.586)
- ----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD..............................................      $10.08          $10.82             $8.96
============================================================================================================================
TOTAL RETURN(1).............................................................       (0.26)%         29.72%            (4.53)%
============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)........................................     $    44             $24                $9
Ratio of Expenses to Average Net Assets.....................................        0.20%           0.20%             0.18%*
Ratio of Net Investment Income to Average Net Assets........................        6.75%           6.90%             7.70%*
Portfolio Turnover Rate.....................................................          46%             45%               70%*
   * Annualized.
 (1) Total return figures do not reflect the annual account maintenance fee of $10.
   + Subscription period for the Portfolio was from January 18, 1994, through February 28, 1994, during which time all
     assets were held in money market instruments.
</TABLE>
    
 
                                       10
<PAGE>   14
 
   
<TABLE>
<CAPTION>
                                                                          ---------------------------------------------------
                                                                                     VANGUARD BALANCED INDEX FUND
                                                                          ---------------------------------------------------
                                                                                                                  SEPT. 28+,
                                                                               YEAR ENDED DECEMBER 31,                TO
                                                                          ---------------------------------          DEC. 31,
                                                                          1996     1995       1994     1993          1992
<S>                                                                      <C>      <C>        <C>      <C>        <C>
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD...................................  $12.77   $10.34     $10.91   $10.31        $10.00
                                                                         ------   ------     ------   ------     ---------
INVESTMENT OPERATIONS
 Net Investment Income.................................................     .50      .45        .41      .39           .08
 Net Realized and Unrealized Gain (Loss) on Investments................    1.26     2.48       (.58)     .63           .31
                                                                          -----    -----      -----    -----      --------
       TOTAL FROM INVESTMENT OPERATIONS................................    1.76     2.98       (.17)    1.02           .39
- -----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income..................................    (.49)    (.45)      (.40)    (.39)         (.08)
 Distributions from Realized Capital Gains.............................    (.12)    (.05)        --     (.03)           --
                                                                          -----    -----      -----    -----      --------
       TOTAL DISTRIBUTIONS.............................................    (.61)    (.50)      (.40)    (.42)         (.08)
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.........................................  $13.92   $12.77     $10.34   $10.91        $10.31
=============================================================================================================================
TOTAL RETURN**.........................................................   13.95%   28.64%     (1.56)%  10.00%         3.69%
=============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)...................................    $826     $590       $403     $367          $109
Ratio of Expenses to Average Net Assets................................    0.20%    0.20%      0.20%    0.20%         0.22%*
Ratio of Net Investment Income to Average Net Assets...................    3.69%    3.85%      3.86%    3.53%         3.76%*
Portfolio Turnover Rate................................................      37%++     16%       16%      25%           17%
Average Commission Rate Paid...........................................  $.0226      N/A        N/A      N/A           N/A
 * Annualized.
 **Total return figures do not reflect the annual account maintenance fee of $10. Subscription
   period for Fund was from September 28, 1992, to November 8, 1992, during which time all assets
   were held in money market instruments. Performance measurement begins on November 9, 1992.
 + Commencement of operations.
 ++ Fund turnover rate excluding in-kind redemptions was 30%.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                      ---------------------------------------------------------------------------------------
                                                                             500 PORTFOLIO
                                      ---------------------------------------------------------------------------------------
                                                                        YEAR ENDED DECEMBER 31,
                                      ---------------------------------------------------------------------------------------
                                      1996      1995     1994     1993     1992     1991     1990     1989     1988     1987
<S>                                  <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>    
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF
 YEAR..............................   $57.60   $42.97   $43.83   $40.97   $39.32   $31.24   $33.64   $27.18   $24.65   $24.27
                                      ------   ------   ------   ------   ------   ------   ------   ------   ------   ------
INVESTMENT OPERATIONS
 Net Investment Income.............     1.28     1.22     1.18     1.13     1.12     1.15     1.17     1.20     1.08      .88
 Net Realized and Unrealized Gain
   (Loss) on Investments...........    11.82    14.76     (.67)    2.89     1.75     8.20    (2.30)    7.21     2.87      .36
                                       -----    -----    -----    -----    -----    -----    -----    -----    -----    -----
       TOTAL FROM INVESTMENT
        OPERATIONS.................    13.10    15.98      .51     4.02     2.87     9.35    (1.13)    8.41     3.95     1.24
- -----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment
   Income..........................    (1.28)   (1.22)   (1.17)   (1.13)   (1.12)   (1.15)   (1.17)   (1.20)   (1.10)    (.69)
 Distributions from Realized
   Capital Gains...................     (.25)    (.13)    (.20)    (.03)    (.10)    (.12)    (.10)    (.75)    (.32)    (.17)
                                       -----    -----    -----    -----    -----    -----    -----    -----    -----    -----
       TOTAL DISTRIBUTIONS.........    (1.53)   (1.35)   (1.37)   (1.16)   (1.22)   (1.27)   (1.27)   (1.95)   (1.42)    (.86)
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.....   $69.17   $57.60   $42.97   $43.83   $40.97   $39.32   $31.24   $33.64   $27.18   $24.65
=============================================================================================================================
TOTAL RETURN*......................    22.88%   37.45%    1.18%    9.89%    7.42%   30.22%   (3.32)%  31.36%   16.22%    4.71%
=============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period
 (Millions)........................  $30,332   $17,372  $9,356   $8,273   $6,547   $4,345   $2,173   $1,804   $1,055     $826
Ratio of Expenses to Average
 Net Assets........................     0.20%    0.20%    0.19%    0.19%    0.19%    0.20%    0.22%    0.21%    0.22%    0.26%
Ratio of Net Investment Income to
 Average Net Assets................     2.04%    2.38%    2.72%    2.65%    2.81%    3.07%    3.60%    3.62%    4.08%    3.15%
Portfolio Turnover Rate............        5%+      4%+      6%+      6%+      4%+      5%+     23%+      8%      10%      15%
Average Commission Rate Paid.......   $.0166      N/A      N/A      N/A      N/A      N/A      N/A      N/A      N/A      N/A
*Total return figures do not reflect the annual account maintenance fee of $10.
+Portfolio turnover rates excluding in-kind redemptions were 2%, 2%, 4%, 2%, 1%, 1%, and 6%, respectively.
</TABLE>
    
 
                                       11
<PAGE>   15
 
   
<TABLE>
<CAPTION>
                     -------------------------------------------------------------------------------------------------------
                                                            EXTENDED MARKET PORTFOLIO
                     -------------------------------------------------------------------------------------------------------
                                                    YEAR ENDED DECEMBER 31,                                       DEC. 21+,
                     ------------------------------------------------------------------------------------------     TO DEC.
                     1996      1995      1994      1993      1992      1991      1990       1989       1988        31, 1987
<S>               <C>       <C>       <C>        <C>       <C>        <C>      <C>       <C>        <C>         <C>      
- ---------------------------------------------------------------------------------------------------------------------------
NET ASSET
 VALUE,
 BEGINNING OF
 PERIOD.........    $24.07    $18.52    $19.43    $17.35    $15.82    $11.48    $13.92     $11.60      $9.99     $10.00
                    ------    ------    ------    ------    ------    ------    ------     ------     ------   --------
INVESTMENT
 OPERATIONS
 Net
   Investment
   Income.......       .34       .30       .28       .23       .24       .25       .30        .26        .34        .03
 Net Realized
   and
   Unrealized
   Gain (Loss)
   on
   Investments..      3.85      5.95      (.62)     2.28      1.72      4.54     (2.25)      2.52       1.63       (.04)
                     -----     -----     -----     -----     -----     -----     -----      -----      -----    -------
   TOTAL FROM
    INVESTMENT
    OPERATIONS...     4.19      6.25      (.34)     2.51      1.96      4.79     (1.95)      2.78       1.97       (.01)
- --------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends
   from Net
   Investment
   Income.....        (.34)     (.30)     (.28)     (.23)     (.25)     (.25)     (.33)      (.23)      (.20)        --
 Distributions
   from
   Realized
   Capital
   Gains......       (1.72)     (.40)     (.29)     (.20)     (.18)     (.20)     (.16)      (.23)      (.16)        --
                     -----     -----     -----     -----     -----     -----     -----      -----      -----    -------
   TOTAL
   DISTRIBUTIONS...  (2.06)     (.70)     (.57)     (.43)     (.43)     (.45)     (.49)      (.46)      (.36)        --
- --------------------------------------------------------------------------------------------------------------------------
NET ASSET
 VALUE, END OF
 PERIOD.......      $26.20    $24.07    $18.52    $19.43    $17.35    $15.82    $11.48     $13.92     $11.60      $9.99
==========================================================================================================================
TOTAL
 RETURN*......       17.65%    33.80%    (1.76)%   14.49%    12.47%    41.85%   (14.05)%    24.10%     19.75%     (0.10)%
==========================================================================================================================
RATIOS/SUPPLEMENTAL
 DATA
Net Assets,
 End of Period
 (Millions)...      $2,099    $1,523      $967      $928      $585      $372      $179       $147        $35         $5
Ratio of
 Expenses to
 Average Net
 Assets.......        0.25%     0.25%     0.20%     0.20%     0.20%     0.19%     0.23%      0.23%      0.24%         0%
Ratio of Net
 Investment
 Income to
 Average Net
 Assets.......        1.42%     1.51%     1.51%     1.48%     1.73%     2.14%     2.68%      2.92%      2.90%         0%
Portfolio
 Turnover
 Rate.........          22%       15%       19%       13%        9%       11%        9%        14%        26%         3%
Average
 Commission
 Rate Paid....      $.0235       N/A       N/A       N/A       N/A       N/A       N/A        N/A        N/A        N/A
*Total return figures do not include transaction fees (0.5% in 1995 and 1996, 1% in 1991 through 1994) on purchases or the
 $10 annual account maintenance fee.
+ Commencement of operations.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                  --------------------------------------------------------
                                                                                TOTAL STOCK MARKET PORTFOLIO
                                                                  --------------------------------------------------------
                                                                                                                    MARCH
                                                                                                                    16+,
                                                                           YEAR ENDED DECEMBER 31,                 TO DEC.
                                                                  ------------------------------------------         31,
                                                                   1996        1995        1994        1993         1992
<S>                                                              <C>         <C>         <C>         <C>         <C>      
- ---------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD............................  $15.04      $11.37      $11.69      $10.84        $10.00
                                                                  ------      ------      ------      ------       -------
INVESTMENT OPERATIONS
 Net Investment Income..........................................     .29         .29         .27         .26           .23
 Net Realized and Unrealized Gain (Loss) on Investments.........    2.84        3.75        (.29)        .88           .84
                                                                   -----       -----       -----       -----        ------
   TOTAL FROM INVESTMENT OPERATIONS.............................    3.13        4.04        (.02)       1.14          1.07
- ---------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income...........................    (.29)       (.28)       (.27)       (.26)         (.23)
 Distributions from Realized Capital Gains......................    (.11)       (.09)       (.03)       (.03)           --
                                                                   -----       -----       -----       -----        ------
   TOTAL DISTRIBUTIONS..........................................    (.40)       (.37)       (.30)       (.29)         (.23)
- ---------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD..................................  $17.77      $15.04      $11.37      $11.69        $10.84
===========================================================================================================================
TOTAL RETURN**..................................................   20.96%      35.79%      (0.17)%     10.62%        10.41%
===========================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)............................  $3,531      $1,571        $786        $512          $275
Ratio of Expenses to Average Net Assets.........................    0.22%       0.25%       0.20%       0.20%         0.21%*
Ratio of Net Investment Income to Average Net Assets............    1.86%       2.14%       2.35%       2.31%         2.42%*
Portfolio Turnover Rate.........................................       3%          3%          2%          1%            3%
Average Commission Rate Paid....................................  $.0216         N/A         N/A         N/A           N/A
   * Annualized.
  ** Total return figures do not reflect the .25% transaction fee on purchases (eliminated at year-end 1995) or the $10
     annual account maintenance fee. Subscription period for the Portfolio was from March 16, 1992, to April 26, 1992, during
     which time all assets were held in money market instruments. Performance measurement begins on April 27, 1992.
   + Commencement of operations.
</TABLE>
    
 
                                       12
<PAGE>   16
 
   
<TABLE>
<CAPTION>
                                                                           ---------------------------------------------------
                                                                                            GROWTH PORTFOLIO
                                                                           ---------------------------------------------------
                                                                                 YEAR ENDED DECEMBER 31,            NOV. 2+,
                                                                           ------------------------------------    TO DEC. 31,
                                                                            1996      1995      1994      1993        1992
<S>                                                                        <C>       <C>       <C>       <C>       <C>
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD...................................... $13.97    $10.28    $10.20    $10.26       $10.00
                                                                           ------    ------    ------    ------     --------
INVESTMENT OPERATIONS
 Net Investment Income....................................................    .22       .21       .21       .21          .06
 Net Realized and Unrealized Gain (Loss) on Investments...................   3.07      3.68       .08      (.06)         .26
                                                                            -----     -----     -----     -----      -------
   TOTAL FROM INVESTMENT OPERATIONS.......................................   3.29      3.89       .29       .15          .32
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income.....................................   (.22)     (.20)     (.21)     (.21)        (.06)
 Distributions from Realized Capital Gains................................   (.14)       --        --        --           --
                                                                            -----     -----     -----     -----      -------
   TOTAL DISTRIBUTIONS....................................................   (.36)     (.20)     (.21)     (.21)        (.06)
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD............................................ $16.90    $13.97    $10.28    $10.20       $10.26
==============================================================================================================================
TOTAL RETURN**............................................................  23.74%    38.06%     2.89%     1.53%        3.19%
==============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)......................................   $787      $271       $86       $51          $21
Ratio of Expenses to Average Net Assets...................................   0.20%     0.20%     0.20%     0.20%           0%
Ratio of Net Investment Income to
 Average Net Assets.......................................................   1.57%     1.71%     2.08%     2.10%        2.85%*
Portfolio Turnover Rate...................................................     29%       24%       28%       36%           2%
Average Commission Rate Paid.............................................. $.0183        N/A       N/A       N/A          N/A
   * Annualized.
  ** Total return figures do not reflect the annual account maintenance fee of $10.
   + Commencement of operations.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                           ---------------------------------------------------
                                                                                             VALUE PORTFOLIO
                                                                           ---------------------------------------------------
                                                                                 YEAR ENDED DECEMBER 31,            NOV. 2+,
                                                                           ------------------------------------    TO DEC. 31,
                                                                            1996      1995      1994      1993        1992
<S>                                                                       <C>       <C>       <C>       <C>        <C>
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD...................................... $14.79    $11.12    $11.74    $10.30       $10.00
                                                                           ------    ------    ------    ------     --------
INVESTMENT OPERATIONS
 Net Investment Income....................................................    .37       .41       .38       .38          .07
 Net Realized and Unrealized Gain (Loss) on Investments...................   2.81      3.66      (.46)     1.50          .30
                                                                            -----     -----     -----     -----      -------
   TOTAL FROM INVESTMENT OPERATIONS.......................................   3.18      4.07      (.08)     1.88          .37
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income.....................................   (.38)     (.40)     (.38)     (.38)        (.07)
 Distributions from Realized Capital Gains................................   (.57)       --      (.16)     (.06)          --
   TOTAL DISTRIBUTIONS....................................................   (.95)     (.40)     (.54)     (.44)        (.07)
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD............................................ $17.02    $14.79    $11.12    $11.74       $10.30
==============================================================================================================================
TOTAL RETURN**............................................................  21.86%    36.94%    (0.73)%   18.35%        3.70%
==============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)...................................... $1,016      $496      $297      $190          $24
Ratio of Expenses to Average Net Assets...................................   0.20%     0.20%     0.20%     0.20%           0%
Ratio of Net Investment Income to
 Average Net Assets.......................................................   2.54%     3.06%     3.37%     3.26%        3.46%*
Portfolio Turnover Rate...................................................     29%       27%       32%       30%           4%
Average Commission Rate Paid.............................................. $.0188        N/A       N/A       N/A          N/A
   * Annualized.
  ** Total return figures do not reflect the annual account maintenance fee of $10.
   + Commencement of operations.
</TABLE>
    
 
                                       13
<PAGE>   17
 
   
<TABLE>
<CAPTION>
                                                  ----------------------------------------------------------------------------
                                                                    SMALL CAPITALIZATION STOCK PORTFOLIO(1)
                                                  ----------------------------------------------------------------------------
                                                                                         
                                                                                        OCT. 1,
                                                                                         1993 
                                                                           FEB. 1 TO      TO         YEAR ENDED SEPTEMBER 30,
                                                                           DEC. 31,    JAN. 31,   ---------------------------
                                                   1996        1995         1994**      1994**     1993      1992      1991
<S>                                               <C>       <C>            <C>          <C>      <C>       <C>       <C>    
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD............. $18.61       $14.99        $16.24     $16.23    $12.63    $12.03     $8.55
                                                  ------     --------       -------     ------    ------    ------    -------
INVESTMENT OPERATIONS
 Net Investment Income (Loss)....................    .26          .24           .20        .05       .20       .19       .20
 Net Realized and Unrealized Gain (Loss) on
   Investments...................................   3.07         4.06          (.86)       .96      3.73       .88      3.60
                                                   -----      -------        ------      -----     -----     -----    ------
   TOTAL FROM INVESTMENT OPERATIONS..............   3.33         4.30          (.66)      1.01      3.93      1.07      3.80
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income............   (.27)        (.23)         (.22)      (.18)     (.18)     (.18)     (.18) 
 Distributions from Realized Capital Gains.......  (1.44)        (.45)         (.37)      (.82)     (.15)     (.29)     (.14) 
                                                   -----      -------        ------      -----     -----     -----    ------
   TOTAL DISTRIBUTIONS...........................  (1.71)        (.68)         (.59)     (1.00)     (.33)     (.47)     (.32) 
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD................... $20.23       $18.61        $14.99     $16.24    $16.23    $12.63    $12.03
==============================================================================================================================
TOTAL RETURN++...................................  18.12%       28.74%        (4.00)%     6.65%    31.60%     9.34%    45.91% 
==============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)............. $1,713         $971          $605       $533      $432      $202      $111
Ratio of Expenses to Average Net Assets..........   0.25%        0.25%         0.17%*     0.18%*    0.18%     0.18%     0.21% 
Ratio of Net Investment Income (Loss) to
 Average Net Assets..............................   1.51%        1.58%         1.50%*     1.16%*    1.47%     1.65%     2.11% 
Portfolio Turnover Rate..........................     28%          28%           25%         5%       26%       26%       33% 
Average Commission Rate Paid..................... $.0245           N/A           N/A        N/A       N/A       N/A       N/ A
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                    ----------------------------------------
                                                                                     SMALL CAPITALIZATION STOCK PORTFOLIO(1)
                                                                                    ----------------------------------------
                                                                                             YEAR ENDED SEPTEMBER 30,
                                                                                    ----------------------------------------
                                                                                   1990(2)     1989       1988       1987
<S>                                                                                <C>        <C>        <C>        <C>    
- ----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.............................................  $11.88     $11.96     $15.73     $13.24
                                                                                   ------     ------     ------     ------
INVESTMENT OPERATIONS
 Net Investment Income (Loss)....................................................     .17        .10        .03       (.04)
 Net Realized and Unrealized Gain (Loss) on Investments..........................   (3.46)      2.13      (2.59)      4.42
                                                                                    -----      -----      -----      -----
   TOTAL FROM INVESTMENT OPERATIONS..............................................   (3.29)      2.23      (2.56)      4.38
- ----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income............................................    (.04)      (.14)        --         --
 Distributions from Realized Capital Gains.......................................      --      (2.17)     (1.21)     (1.89)
                                                                                    -----      -----      -----      -----
   TOTAL DISTRIBUTIONS...........................................................    (.04)     (2.31)     (1.21)     (1.89)
- ----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD...................................................   $8.55     $11.88     $11.96     $15.73
============================================================================================================================
TOTAL RETURN++...................................................................  (27.73)%    18.83%    (14.30)%    38.02%
============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).............................................     $40        $20        $27        $35
Ratio of Expenses to Average Net Assets..........................................    0.31%      1.00%      0.95%      0.92%
Ratio of Net Investment Income (Loss) to Average Net Assets......................    1.91%      0.65%      0.24%     (0.25)%
Portfolio Turnover Rate..........................................................      40%       160%        68%        92%
Average Commission Rate Paid.....................................................      N/A        N/A        N/A        N/A
   * Annualized.
  ** Unaudited.
 (1) Results prior to January 31, 1994 are for the former Vanguard Small Capitalization Stock Fund.
 (2) Adjusted to reflect a 3-for-1 stock split as of February 3, 1990.
  ++ Total return figures do not reflect the annual account maintenance fees of $10 or the 1% portfolio transaction fee on
     purchases.
</TABLE>
    
 
                                       14
<PAGE>   18
 
   
<TABLE>
<CAPTION>
                                                   ---------------------------------------------------------------------------
                                                                               EUROPEAN PORTFOLIO
                                                   ---------------------------------------------------------------------------
                                                                                                                     MAY 1+,
                                                                     YEAR ENDED DECEMBER 31,                           TO
                                                   -----------------------------------------------------------      DEC. 31,
                                                    1996       1995       1994       1993       1992      1991        1990
<S>                                                <C>        <C>        <C>        <C>        <C>        <C>       <C>
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.............  $14.02     $11.76     $11.88      $9.33      $9.92     $9.06       $10.00
                                                   ------     ------     ------     ------     ------     -----      -------
INVESTMENT OPERATIONS
 Net Investment Income...........................     .34        .32        .28        .17        .25       .26          .16
 Net Realized and Unrealized Gain (Loss) on
   Investments...................................    2.63       2.30       (.06)      2.55       (.58)      .86         (.94)
                                                   ------     ------     ------     ------     ------     -----      -------
   TOTAL FROM INVESTMENT OPERATIONS..............    2.97       2.62        .22       2.72       (.33)     1.12         (.78)
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income............    (.36)      (.32)      (.28)      (.17)      (.26)     (.26)        (.16)
 Distributions from Realized Capital Gains.......    (.06)      (.04)      (.06)        --         --        --           --
                                                   ------     ------     ------     ------     ------     -----      -------
   TOTAL DISTRIBUTIONS...........................    (.42)      (.36)      (.34)      (.17)      (.26)     (.26)        (.16)
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD...................  $16.57     $14.02     $11.76     $11.88      $9.33     $9.92        $9.06
==============================================================================================================================
TOTAL RETURN(1)..................................   21.26%     22.28%      1.88%     29.13%     (3.32)%   12.40%       (7.23)%
==============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).............  $1,595     $1,017       $715       $601       $256      $161          $96
Ratio of Expenses to Average Net Assets..........    0.35%      0.35%      0.32%      0.32%      0.32%     0.33%        0.40%*
Ratio of Net Investment Income to Average Net
 Assets..........................................    2.45%      2.66%      2.41%      2.05%      3.05%     3.06%        3.68%*
Portfolio Turnover Rate..........................       4%         2%         6%         4%         1%       15%**         3%
Average Commission Rate Paid.....................  $.0395         N/A        N/A        N/A        N/A       N/A          N/A
   * Annualized.
  ** Portfolio turnover rates for 1991 excluding in-kind redemptions was 3% for the European Portfolio.
   + Commencement of operations.
 (1) Total return figures do not reflect the 1% transaction fee on purchases or the annual account maintenance fee of $10.
     Subscription period for Portfolio was May 1, 1990, to June 17, 1990, during which time all assets were held in money
     market instruments. Performance measurement begins on June 18, 1990.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                   ----------------------------------------------------------------------------
                                                                              PACIFIC PORTFOLIO
                                                   ----------------------------------------------------------------------------
                                                                                                                     MAY 1+,
                                                                     YEAR ENDED DECEMBER 31,                           TO
                                                   -----------------------------------------------------------      DEC. 31,
                                                    1996       1995       1994       1993       1992      1991        1990
<S>                                               <C>        <C>        <C>         <C>        <C>        <C>       <C>
- -------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.............  $11.50     $11.31     $10.13      $7.56       $9.42     $8.56       $10.00
                                                   ------     ------     ------     ------      ------     -----      -------
INVESTMENT OPERATIONS
 Net Investment Income...........................     .10        .10        .08        .06         .05       .05          .05
 Net Realized and Unrealized Gain (Loss) on
   Investments...................................   (1.00)       .21       1.24       2.62       (1.76)      .86        (1.44)
                                                   ------     ------     ------     ------      ------     -----      -------
   TOTAL FROM INVESTMENT OPERATIONS..............    (.90)       .31       1.32       2.68       (1.71)      .91        (1.39)
- -------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income............    (.09)      (.12)      (.08)      (.06)       (.05)     (.05)        (.05)
 Distributions from Realized Capital Gains.......      --         --       (.06)      (.05)       (.10)       --           --
                                                   ------     ------     ------     ------      ------     -----      -------
   TOTAL DISTRIBUTIONS...........................    (.09)      (.12)      (.14)      (.11)       (.15)     (.05)        (.05)
- -------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD...................  $10.51     $11.50     $11.31     $10.13       $7.56     $9.42        $8.56
===============================================================================================================================
TOTAL RETURN(1)..................................   (7.82)%    2.75%      13.04%     35.46%     (18.17)%   10.65%      (14.01)%
===============================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).............    $978       $831       $697       $493        $207       $84          $31
Ratio of Expenses to Average Net Assets..........    0.35%      0.35%      0.32%      0.32%       0.32%     0.32%        0.35%*
Ratio of Net Investment Income to Average Net
 Assets..........................................    0.89%      0.97%      0.71%      0.75%       0.92%     0.70%        1.02%*
Portfolio Turnover Rate..........................       9%         1%         4%         7%          3%       21%**         2%
Average Commission Rate Paid.....................  $.0156         N/A        N/A        N/A         N/A       N/A          N/A
   * Annualized.
  ** Portfolio turnover rates for 1991 excluding in-kind redemptions was 1% for the Pacific Portfolio.
   + Commencement of operations.
 (1) Total return figures do not reflect the 1% transaction fee on purchases or the annual account maintenance fee of $10.
     Subscription period for Portfolio was May 1, 1990, to June 17, 1990, during which time all assets were held in money
     market instruments. Performance measurement begins on June 18, 1990.
</TABLE>
    
                                       15
<PAGE>   19
   
<TABLE>
<CAPTION>
                                                                               -------------------------------------------
                                                                                       EMERGING MARKETS PORTFOLIO
                                                                               -------------------------------------------
                                                                                YEAR ENDED DECEMBER 31,        MAY 4+ TO
                                                                               -------------------------        DEC. 31,
                                                                                   1996           1995            1994
<S>                                                                             <C>            <C>              <C>
- --------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD...........................................  $10.75         $10.37           $10.00
                                                                                 ------         ------          -------
INVESTMENT OPERATIONS
 Net Investment Income.........................................................     .18            .15              .06
 Net Realized and Unrealized Gain (Loss) on Investments........................    1.52           (.09)             .92
                                                                                 ------         ------          -------
   TOTAL FROM INVESTMENT OPERATIONS............................................    1.70            .06              .98
- --------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income..........................................    (.17)          (.18)            (.07)
 Distributions from Realized Capital Gains.....................................      --             --             (.04)
                                                                                 ------         ------          -------
   TOTAL DISTRIBUTIONS.........................................................    (.17)          (.18)            (.11)
- --------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.................................................  $12.28         $10.75           $10.87
==========================================================================================================================
TOTAL RETURN(1)................................................................   15.83%           .56%            9.81%
==========================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)...........................................    $637           $234              $83
Ratio of Expenses to Average Net Assets........................................    0.60%          0.60%            0.60%*
Ratio of Net Investment Income to Average Net Assets...........................    1.69%          2.00%            1.32%*
Portfolio Turnover Rate........................................................       1%             3%               6%
Average Commission Rate Paid...................................................  $.0004             N/A              N/A
   * Annualized.
   + Commencement of operations.
 (1) Total return does not reflect the 2% transaction fee on purchases, the 1% transaction fee on redemptions, or the annual
     account maintenance fee of $10. Subscription period for Portfolio was April 18, 1994, to May 3, 1994, during which time
     all assets were held in money market instruments. Performance measurement begins on May 4, 1994.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                            -----------------------------
                                                                                            TOTAL INTERNATIONAL PORTFOLIO
                                                                                            -----------------------------
                                                                                                   APRIL 29+, TO
                                                                                                 DECEMBER 31, 1996
<S>                                                                                        <C>                          
- -------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD...............................................                    $10.26
                                                                                            -----------------
INVESTMENT OPERATIONS
 Income Dividends Received.........................................................                      .150
 Capital Gain Distributions Received...............................................                      0.15
                                                                                            -----------------
   Total Distributions Received....................................................                      .165
 Net Realized and Unrealized Gain (Loss) on Investments............................                     (.110)
                                                                                            -----------------
   TOTAL FROM INVESTMENT OPERATIONS................................................                      0.55
- -------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income..............................................                     (.160)
 Distributions from Realized Capital Gains.........................................                     (0.15)
                                                                                            -----------------
   TOTAL DISTRIBUTIONS.............................................................                     (.175)
- -------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.....................................................                    $10.14
=========================================================================================================================
TOTAL RETURN**.....................................................................                      0.55%
=========================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)...............................................                      $280
Ratio of Expenses to Average Net Assets............................................                         0%
Ratio of Net Investment Income to Average Net Assets...............................                      1.51%*
Portfolio Turnover Rate............................................................                         0%
Average Commission Rate Paid.......................................................                        N/A
   * Annualized.
  ** Total return figures do not reflect the 1% transaction fee on purchases or the annual account maintenance fee of $10.
   + Commencement of operations.
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>
    
 

 
                                       16
<PAGE>   20
 
   
YIELD AND TOTAL
RETURN                   From time to time a Portfolio may advertise its yield
                         and total return. Both yield and total return figures
                         are based on historical earnings and are not intended
                         to indicate future performance. The "total return" of a
                         Portfolio refers to the average annual compounded rates
                         of return over one-, five- and ten-year periods or for
                         the life of the Portfolio (as stated in the
                         advertisement) that would equate an initial amount
                         invested at the beginning of a stated period to the
                         ending redeemable value of the investment, assuming the
                         reinvestment of all dividend and capital gains
                         distributions.
    
 
                         In accordance with industry guidelines set forth by the
                         U.S. Securities and Exchange Commission, the "30-day
                         yield" of a Portfolio is calculated by dividing the net
                         investment income per share earned during a 30-day
                         period by the net asset value per share on the last day
                         of the period. Net investment income includes interest
                         and dividend income earned on a Portfolio's securities;
                         it is net of all expenses and all recurring and
                         nonrecurring charges that have been applied to all
                         shareholder accounts. The yield calculation assumes
                         that net investment income earned over 30 days is
                         compounded monthly for six months and then annualized.
                         Methods used to calculate advertised yields are
                         standardized for all stock and bond mutual funds.
                         However, these methods differ from the accounting
                         methods used by a Portfolio to maintain its books and
                         records, and so the advertised 30-day yield may not
                         fully reflect the income paid to an investor's account.
- --------------------------------------------------------------------------------
 
   
INVESTMENT
OBJECTIVES               Vanguard Bond Index Fund, Vanguard Balanced Index Fund,
                         Vanguard Index Trust and Vanguard International Equity
                         Index Fund are each open-end diversified investment
                         companies designed as "index" funds. The Total
                         International Portfolio is part of Vanguard STAR Fund,
                         an open-end non-diversified investment company. This
                         Portfolio is also designed as an index fund.
    
  ------------------------------------------------------------------------------
 
BOND INDEX FUND

EACH PORTFOLIO SEEKS
TO MATCH THE
INVESTMENT
PERFORMANCE OF ITS
RESPECTIVE INDEX         The Fund consists of four Portfolios, each of which
                         seeks to match the investment results of a particular
                         investment grade bond index through the use of index
                         sampling techniques. The Total Bond Market Portfolio
                         seeks to replicate the performance of a broad market
                         weighted bond index, while the Short-Term Bond,
                         Intermediate-Term Bond and Long-Term Bond Portfolios
                         attempt to replicate the performance of market weighted
                         bond indexes with prescribed maturity standards. There
                         is no assurance that any of the Fund's Portfolios will
                         achieve its stated objective.
  ------------------------------------------------------------------------------
 
   
BALANCED INDEX
FUND

THE FUND SEEKS
TO TRACK THE
WILSHIRE 5000 AND THE
LEHMAN BROTHERS
INDEX                    The objective of the Fund is to replicate, with respect
                         to 60% of its assets, the investment performance of the
                         Wilshire 5000 Equity Index and, with respect to 40% of
                         its assets, the investment performance of the Lehman
                         Brothers Aggregate Bond Index (the "Lehman Brothers
                         Index"). There is no assurance that the Fund will
                         achieve its stated objective.
    
 
                         The Wilshire 5000 consists of all U.S. common stocks
                         that trade on a regular basis on the New York and
                         American Stock Exchanges and in the NASDAQ
                         over-the-counter market. The Lehman Brothers Index
                         measures the total return (capital change plus income)
                         provided by a universe of fixed-income securities,
                         weighted by market value. The
 
                                       17
<PAGE>   21
 
   
                         securities included in the index generally have an
                         outstanding market value of at least $100 million, are
                         of investment grade quality and are readily available
                         in the marketplace.
    
  ------------------------------------------------------------------------------
 
INDEX TRUST

EACH PORTFOLIO SEEKS
TO MATCH THE
INVESTMENT
PERFORMANCE OF A
PARTICULAR STOCK
MARKET INDEX             The Trust consists of six Portfolios, each of which
                         seeks to provide investment results that correspond to
                         a particular stock market index. The correlation
                         between the performance of each of the Trust's
                         Portfolios and the respective index that each Portfolio
                         attempts to match is expected to be at least 0.95. The
                         500, Extended Market, Total Stock Market and Small
                         Capitalization Stock Portfolios attempt to replicate
                         the investment performance of broad market indexes,
                         while the Value and Growth Portfolios attempt to
                         replicate indexes which possess certain "value" and
                         "growth" investment characteristics.
 
                         - The 500 PORTFOLIO seeks to replicate the aggregate
                           price and yield performance of the Standard & Poor's
                           500 Composite Stock Price Index (the "S&P 500
                           Index"), an index which emphasizes large-
                           capitalization companies.
 
   
                         - The EXTENDED MARKET PORTFOLIO seeks to replicate the
                           aggregate price and yield performance of the Wilshire
                           4500 Equity Index, an index which consists of more
                           than 5,000 medium- and small-capitalization companies
                           that are not included in the S&P 500 Index.
    
 
   
                         - The TOTAL STOCK MARKET PORTFOLIO seeks to replicate
                           the aggregate price and yield performance of the
                           Wilshire 5000 Equity Index, an index which consists
                           of all U.S. stocks that trade on a regular basis on
                           either the New York or American Stock Exchange or the
                           NASDAQ over-the-counter market. These stocks include
                           the large-capitalization companies of the S&P 500
                           Index, with the exception of Royal Dutch and
                           Unilever, N.V., which trade on the New York Stock
                           Exchange as ADR's, as well as the medium- and
                           small-capitalization companies of the Wilshire Equity
                           4500 Index.
    
 
   
                         - The SMALL CAPITALIZATION STOCK PORTFOLIO seeks to
                           replicate the aggregate price and yield performance
                           of the Russell 2000 Index (the "Russell 2000"), a
                           broadly diversified small-capitalization stock index
                           consisting of approximately 2,000 common stocks.
    
 
                         - The VALUE PORTFOLIO seeks to replicate the aggregate
                           price and yield performance of the S&P/BARRA Value
                           Index, an index which includes stocks in the S&P 500
                           Index with lower than average ratios of market price
                           to book value. These types of stocks are often
                           referred to as "value" stocks.
 
                         - The GROWTH PORTFOLIO seeks to replicate the aggregate
                           price and yield performance of the S&P/BARRA Growth
                           Index, an index which includes stocks in the S&P 500
                           Index with higher than average ratios of market price
                           to book value. These types of stocks are often
                           referred to as "growth" stocks.
  ------------------------------------------------------------------------------
 
                                       18
<PAGE>   22
 
   
INTERNATIONAL
EQUITY INDEX FUND

EACH PORTFOLIO SEEKS
TO MATCH THE
INVESTMENT
PERFORMANCE OF ITS
RESPECTIVE INDEX         The Fund consists of three Portfolios, each of which
                         seeks to match the investment results of a Morgan
                         Stanley Capital International Index. The European
                         Portfolio seeks to replicate the aggregate price and
                         yield performance of the Morgan Stanley Capital
                         International-Europe (Free) Index ("MSCI-Europe
                         (Free)"), a diversified, capitalization weighted index
                         comprised of companies located in fourteen European
                         countries. The Pacific Portfolio seeks to replicate the
                         aggregate price and yield performance of the Morgan
                         Stanley Capital International-Pacific (Free) Index
                         ("MSCI-Pacific (Free)"), a diversified, capitalization
                         weighted index consisting of companies located in
                         Australia, Japan, Hong Kong, New Zealand, Singapore and
                         Malaysia.
    
 
   
                         By combining the European and Pacific Portfolios in
                         appropriate proportions, an investor may create an
                         aggregate portfolio designed to approximate the total
                         return (income plus capital change) of the Morgan
                         Stanley Capital International-Europe, Australasia and
                         Far East (Free) Index ("EAFE Free"), a broadly
                         diversified international index consisting of more than
                         1,000 equity securities of companies in Europe and the
                         Pacific Rim. As of December, 31, 1996, the MSCI-Pacific
                         (Free) Index represented approximately 44% of the
                         market capitalization of EAFE (Free), while the
                         MSCI-Europe (Free) Index represented the remaining 56%.
    
 
   
                         The Emerging Markets Portfolio seeks, with respect to
                         95% of assets, to provide investment results that
                         parallel the Morgan Stanley Capital International
                         ("MSCI")-Select Emerging Markets Free Index ("Index").
                         The MSCI-Select Emerging Markets Free Index is a
                         diversified index consisting of common stocks located
                         in 14 countries. This Index provides broader
                         diversification and more liquidity than other
                         "published" emerging markets indexes and also takes
                         into consideration the trading capabilities of
                         foreigners in emerging stock market countries.
    
 
                         The Fund is neither sponsored by nor affiliated with
                         Morgan Stanley Capital International.
  ------------------------------------------------------------------------------
 
   
VANGUARD TOTAL
INTERNATIONAL
PORTFOLIO                The Total International Portfolio seeks to match the
                         performance of the Morgan Stanley Capital International
                         (MSCI) -- Europe, Australasia, and Far East + Select
                         Emerging Markets (Free) Index ("MSCI -- EAFE + Select
                         EMF Index") by investing in a combination of the
                         European, Pacific, and Emerging Markets Portfolios of
                         Vanguard International Equity Index Fund.
    
  ------------------------------------------------------------------------------
 
ALL PORTFOLIOS           The investment objectives of each Portfolio of Vanguard
                         Bond Index Fund and Vanguard Index Trust are
                         fundamental and so cannot be changed without the
                         approval of a majority of a Portfolio's shareholders.
 
                         The investment objectives of Vanguard Balanced Index
                         Fund, each Portfolio of Vanguard International Equity
                         Index Fund and Vanguard Total International Portfolio
                         are not fundamental and may be changed by the Board of
                         Directors without shareholder approval. However,
                         shareholders would be notified prior to a material
                         change.
 
                                       19
<PAGE>   23
 
   
                         There is no assurance that the Portfolios will achieve
                         their stated objectives.
    
- --------------------------------------------------------------------------------
 
   
INVESTMENT
POLICIES

EACH PORTFOLIO USES
A "PASSIVE"
INVESTMENT APPROACH      The Portfolios are not managed according to traditional
                         methods of "active" investment management, which
                         involve the buying and selling of securities based upon
                         economic, financial and market analysis and investment
                         judgment. Instead, the Portfolios, utilizing a
                         "passive" or indexing investment approach, attempt to
                         approximate the investment performance of their
                         respective indexes through statistical procedures. The
                         Portfolios are managed without regard to tax
                         ramifications.
    
 
   
                         Each Portfolio is responsible for voting the shares of
                         all securities it holds.
    
 
   
                         The investment policies of the Portfolios are not
                         fundamental and so may be changed by the Board of
                         Directors (Trustees) without shareholder approval.
                         However, shareholders would be notified prior to a
                         material change.
    
  ------------------------------------------------------------------------------
 
BOND INDEX FUND

EACH PORTFOLIO INVESTS
IN FIXED INCOME
SECURITIES               Each Portfolio will invest in a group of fixed-income
                         securities selected from its respective index which,
                         when taken together, are expected to perform similarly
                         to the index as a whole. This sampling technique is
                         expected to enable each Portfolio to track the dividend
                         income and price movements of its respective index,
                         while minimizing brokerage, custodial and accounting
                         costs.
 
                         The TOTAL BOND MARKET PORTFOLIO will invest in a
                         portfolio of fixed-income securities selected to match
                         the Lehman Brothers Aggregate Bond Index (the
                         "Aggregate Bond Index"). The Aggregate Bond Index is a
                         broad market weighted index which encompasses four
                         major classes of investment grade fixed-income
                         securities in the United States: U.S. Treasury and
                         agency securities, corporate bonds, international
                         (dollar-denominated) bonds, and mortgage-backed
                         securities, with maturities greater than one year.
 
   
                         The SHORT-TERM BOND PORTFOLIO will invest in a
                         portfolio of fixed-income securities selected to match
                         the Lehman Brothers Mutual Fund Short (1-5)
                         Government/Corporate Index (the "Short-Term Index").
                         The Short-Term Index is a market weighted index which
                         encompasses three major classes of investment grade
                         fixed-income securities: U.S. Treasury and, agency
                         securities, corporate bonds, and international (dollar-
                         denominated) bonds, all with maturities between 1 and 5
                         years.
    
 
                         The INTERMEDIATE-TERM BOND PORTFOLIO will invest in a
                         portfolio of fixed-income securities selected to match
                         the Lehman Brothers Mutual Fund Intermediate (5-10)
                         Government/Corporate Index (the "Intermediate-Term
                         Index"). The Intermediate-Term Index is a market
                         weighted index which encompasses three major classes of
                         investment grade fixed-income securities: U.S. Treasury
                         and agency securities, corporate bonds, and
                         international (dollar-denominated) bonds, all with
                         maturities between 5 and 10 years.
 
                         The LONG-TERM BOND PORTFOLIO will invest in a portfolio
                         of fixed-income securities selected to match the Lehman
                         Brothers Mutual Fund
 
                                       20
<PAGE>   24
 
                         Long (10+) Government/Corporate Index (the "Long-Term
                         Index"). The Long-Term Index is a market weighted index
                         which encompasses three major classes of investment
                         grade fixed-income securities: U.S. Treasury and agency
                         securities, corporate bonds, and international (dollar-
                         denominated) bonds, all with maturities greater than 10
                         years.
 
   
                         Each Portfolio will invest 80% or more of its assets in
                         securities included in its respective index. As of
                         December 31, 1996, the major classes of fixed-income
                         securities represented the following proportions of the
                         respective indexes' total market values:
    
 
   
<TABLE>
<CAPTION>
                                                 AGGREGATE    SHORT-TERM   INTERMEDIATE-   LONG-TERM
                                                 BOND INDEX     INDEX       TERM INDEX       INDEX
                           <S>                   <C>          <C>          <C>             <C>
                           -------------------------------------------------------------------------
                           U.S. Treasury and
                             agency securities        52%          86%           57%            66%
                           Corporate bonds            14%          12%           32%            28%
                           International
                             (dollar-
                             denominated) bonds        4%           2%           11%             6%
                           Mortgage-backed
                             securities               30%           0%            0%             0%
                           Dollar-weighted
                             Average Maturity
                             (Years)                 8.7yrs       2.7yrs    7.6 yrs           23.3yrs
</TABLE>
    
 
   
                         The Total Bond Market and Short-Term Bond Portfolios of
                         the Fund may, from time to time, substitute one type of
                         investment grade bond for another. For instance, a
                         Portfolio may hold more short-term corporate bonds
                         (fewer short-term U.S. Treasury bonds) than represented
                         in the Index so as to increase income. This corporate
                         substitution strategy will entail the assumption of
                         additional credit risk; however, substantial
                         diversification within the corporate sector should
                         moderate issue-specific credit risk. In addition,
                         current investment policy restricts corporate
                         substitutions to issues with less than 4 years
                         remaining to maturity and in aggregate no more than 15%
                         of net assets. Overall, credit risk is expected to be
                         very low for each of the Portfolios.
    
 
                         Fixed-income securities will be primarily of investment
                         grade quality -- i.e., those rated at least Baa3 by
                         Moody's Investors Service, Inc. or BBB- by Standard &
                         Poor's Corporation. Securities rated Baa or BBB are
                         considered as medium grade obligations. Interest
                         payments and principal are regarded as adequate for the
                         present but certain protective elements found in higher
                         rated bonds may be lacking. Such bonds lack outstanding
                         investment characteristics and, in fact, have
                         speculative characteristics as well.
 
                         In its efforts to duplicate the investment performance
                         of the Index, each Portfolio will invest in
                         fixed-income securities approximating its relative
                         proportion of the Index's total market value. For the
                         Total Bond Market Portfolio, these investments will
                         include U.S. Treasury and agency securities,
                         mortgage-backed securities and corporate and
                         international (dollar-denominated) bonds. For the
                         Short-Term Bond, Intermediate-Term Bond and Long-Term
                         Bond Portfolios, these investments include U.S.
                         Treasury and agency securities, corporate debt and
                         international (dollar-denominated) debt. The Portfolios
                         may invest in U.S. Treasury bills, notes and bonds and
                         other "full faith and credit"
 
                                       21
<PAGE>   25
 
                         obligations of the U.S. Government. The Portfolios may
                         also invest in U.S. Government agency securities, which
                         are debt obligations issued or guaranteed by agencies
                         or instrumentalities of the U.S. Government. Such
                         "agency" securities may not be backed by the "full
                         faith and credit" of the U.S. Government. Such U.S.
                         Government agencies may include the Federal Farm Credit
                         Banks, the Resolution Trust Corporation and in the case
                         of the Total Bond Market Portfolio, the Government
                         National Mortgage Association. Even though they all
                         carry top (AAA) credit ratings, "agency" obligations
                         are not explicitly guaranteed by the U.S. Government
                         and so are perceived as somewhat riskier than
                         comparable Treasury bonds.
 
                         Each Portfolio may also invest up to 20% of its assets
                         in short-term money market instruments, and may invest
                         in bond (interest rate) futures contracts and options
                         to a limited extent. Such securities will be held only
                         to invest uncommitted cash balances, to maintain
                         liquidity to meet shareholder redemptions, or to
                         minimize trading costs. The Portfolios will not invest
                         in such securities as part of a temporary defensive
                         strategy (such as altering the aggregate maturity of a
                         Portfolio) to protect the Fund against potential bond
                         market declines. Each Portfolio intends to remain fully
                         invested, to the extent practicable, in a pool of
                         securities which will duplicate the investment
                         characteristics of the respective index. See
                         "Implementation of Policies" for a description of other
                         investment practices of the Fund.
  ------------------------------------------------------------------------------
 
   
BALANCED INDEX
FUND

THE FUND INVESTS IN
STOCKS AND BONDS         Under normal circumstances, the Fund will invest 60% of
                         its net assets in a portfolio of common stocks selected
                         to track the Wilshire 5000 and 40% of its net assets in
                         a portfolio of investment-grade bonds designed to track
                         the Lehman Brothers Aggregate Bond Index (the "Lehman
                         Brothers Index"). The Fund may also invest in certain
                         short-term fixed income securities as cash reserves,
                         although cash and cash equivalents are normally
                         expected to represent less than 1% of the Fund's
                         assets.
    
 
   
                         The Fund's common stock portfolio will invest in a
                         portfolio of common stocks selected to match the
                         Wilshire 5000. The Fund is expected to invest in
                         approximately 500 of the largest securities in the
                         Wilshire 5000 as measured by market capitalization and
                         a representative sample of the remainder. Typically,
                         the Fund will hold between 2,200 and 2,400 stocks,
                         which are selected primarily on the basis of market
                         capitalization and industry weightings.
    
 
   
                         The Fund's bond portfolio will invest in a portfolio of
                         fixed income securities selected to match the Lehman
                         Brothers Index, a broad market-weighted index which
                         encompasses four major classes of investment grade
                         fixed-income securities in the United States: U.S.
                         Treasury and agency securities, corporate bonds,
                         international (dollar-denominated) bonds, and
                         mortgage-backed securities, with maturities greater
                         than one year. The Fund will invest in a representative
                         sample of fixed-income securities in the Lehman
                         Brothers Index, which, taken together, are expected to
                         perform similarly to the Index.
    
 
   
                         The Fund may, from time to time, substitute one type of
                         investment grade bond for another. For instance, the
                         Fund may hold more short-term
    
 
                                       22
<PAGE>   26
 
   
                         corporate bonds (fewer short-term U.S. Treasury bonds)
                         than represented in the Index so as to increase income.
                         This corporate substitution strategy will entail the
                         assumption of additional credit risk; however,
                         substantial diversification within the corporate sector
                         should moderate issue-specific credit risk. In
                         addition, current investment policy restricts corporate
                         substitutions to issues with less than 4 years
                         remaining to maturity and in aggregate no more than 15%
                         of net assets. Overall, credit risk is expected to be
                         very low for each of the Portfolios.
    
 
   
                         Fixed-income securities will be primarily of investment
                         grade quality -- i.e., those rated at least Baa3 by
                         Moody's Investors Service, Inc. or BBB- by Standard &
                         Poor's Corporation. Securities rated Baa or BBB are
                         considered medium grade obligations. Interest payments
                         and principal are regarded as adequate for the present
                         but certain protective elements found in higher rated
                         bonds may be lacking. Such bonds lack outstanding
                         investment characteristics and, in fact, have
                         speculative characteristics as well.
    
 
                         The Fund may also invest up to 30% of its assets in
                         stock or bond futures contracts and options in order to
                         invest uncommitted cash balances, to maintain liquidity
                         to meet shareholder redemptions, or to minimize trading
                         costs. The Fund will not invest in futures contracts,
                         options, or cash reserves as part of a temporary
                         defensive strategy, such as lowering the Fund's
                         investment allocation in common stocks to protect
                         against potential stock market declines. The Fund
                         intends to remain fully invested, to the extent
                         practicable, in a pool of securities which will
                         duplicate the investment characteristics of the
                         Wilshire 5000 and Lehman Brothers Indexes. See
                         "Implementation of Policies" for a description of these
                         and other investment practices of the Fund.
  ------------------------------------------------------------------------------
 
   
INDEX TRUST

ALL SIX PORTFOLIOS
INVEST IN
COMMON STOCKS            The 500, Value, and Growth Portfolios each invest in
                         all the stocks included in each of their respective
                         indexes in approximately the same proportion as they
                         are represented in the index. The Extended Market,
                         Total Stock Market, and Small Capitalization Stock
                         Portfolios invest in statistically selected samples of
                         the stocks included in each of their respective
                         indexes. This sampling technique is expected to enable
                         each of these Portfolios to track the price movements
                         of its respective index, while minimizing the
                         brokerage, custodial, and accounting costs.
    
 
                         The 500 PORTFOLIO invests in all 500 stocks in the S&P
                         500 Index in approximately the same proportions as they
                         are represented in the Index.
 
   
                         The EXTENDED MARKET PORTFOLIO invests in a
                         statistically selected sample of the more than 5,000
                         stocks included in the Wilshire 4500 Index. Typically,
                         the Portfolio invests in approximately 2,000 stocks.
                         Stocks are selected for inclusion in the Portfolio
                         based primarily on market capitalization and industry
                         weightings. The Portfolio is constructed to have
                         aggregate investment characteristics similar to those
                         of the Wilshire 4500 Index.
    
 
   
                         The TOTAL STOCK MARKET PORTFOLIO invests in a
                         statistically selected sample of the more than 7,300
                         stocks included in the Wilshire 5000 Index. Typically,
                         the Portfolio invests in approximately 2,700 stocks.
                         Stocks are selected for inclusion in the Portfolio
                         based primarily on
    
 
                                       23
<PAGE>   27
 
                         market capitalization and industry weightings. The
                         Portfolio is constructed to have aggregate investment
                         characteristics similar to those of the Wilshire 5000
                         Index.
 
   
                         The SMALL CAPITALIZATION STOCK PORTFOLIO invests in a
                         statistically selected sample of the approximately
                         1,900 stocks included in the Russell 2000 Index.
                         Typically, the Portfolio invests in approximately 1,500
                         stocks. Stocks are selected for inclusion in the
                         Portfolio based on their contribution to the
                         Portfolio's market capitalization, industry weightings
                         and other fundamental characteristics such as price-
                         earnings ratios, dividend yields, price-to-book ratios
                         and financial leverage. The stocks held by the
                         Portfolio are weighted to make the Portfolio's
                         aggregate investment characteristics similar to those
                         of the Russell 2000 Index as a whole.
    
 
   
                         The VALUE PORTFOLIO invests in all of the common stocks
                         included in the S&P/BARRA Value Index in approximately
                         the same proportions as they are represented in the
                         Index. As of December 31, 1996, the S&P/BARRA Value
                         Index included 340 of the stocks that make up the S&P
                         500 Index, and 50% of the total market value of the
                         Index.
    
 
   
                         The GROWTH PORTFOLIO invests in all of the common
                         stocks included in the S&P/BARRA Growth Index in
                         approximately the same proportions as they are
                         represented in the Index. As of December 31, 1996, the
                         S&P/BARRA Growth Index included 160 of the stocks that
                         make up the S&P 500 Index, and 50% of the total market
                         value of the Index.
    
 
   
ALL SIX PORTFOLIOS
ATTEMPT TO REMAIN
FULLY INVESTED           Each Portfolio attempts to remain fully invested in
                         common stocks. Under normal circumstances each
                         Portfolio will invest at least 95% of its assets in the
                         common stocks of its respective index and futures
                         contracts and options. Each Portfolio may invest in
                         certain short-term fixed income securities such as cash
                         reserves, although cash or cash equivalents are
                         normally expected to represent less than 1% of each
                         Portfolio's assets. Each Portfolio may also invest up
                         to 20% of its assets in stock futures contracts and
                         options in order to invest uncommitted cash balances,
                         to maintain liquidity to meet shareholder redemptions,
                         or to minimize trading costs. The Portfolios will not
                         invest in cash reserves, futures contracts or options
                         as part of a temporary defensive strategy, such as
                         lowering a Portfolio's investment in common stocks to
                         protect against potential stock market declines. The
                         Portfolios intend to remain fully invested, to the
                         extent practicable, in a pool of securities which will
                         duplicate the investment characteristics of their
                         respective indexes. See "Implementation of Policies"
                         for a description of these and other investment
                         practices of the Trust.
    
  ------------------------------------------------------------------------------
 
   
INTERNATIONAL
EQUITY INDEX FUND

EACH PORTFOLIO
INVESTS IN
INTERNATIONAL STOCKS     Each of the three Portfolios invest in statistically
                         selected samples of the stocks included in each of
                         their respective indexes. This sampling technique is
                         expected to enable each Portfolio to track the price
                         movements of its respective index, while minimizing the
                         brokerage, custodial, and accounting costs.
    
 
                         The EUROPEAN PORTFOLIO invests in a statistically
                         selected sample of approximately 600 stocks included in
                         the MSCI-Europe (Free) Index, an index of equity
                         securities of companies located in fourteen European
 
                                       24
<PAGE>   28
 
   
                         countries. Three countries, the United Kingdom, Germany
                         and France, dominate MSCI-Europe (Free), with 34%, 14%,
                         and 12% of the market capitalization of the Index,
                         respectively, as of December 31, 1996. The 11 other
                         countries are individually much less significant to the
                         Index and, consequently, the Portfolio. The "Free"
                         Index includes only shares that U.S. investors are
                         "free" to purchase.
    
 
   
                         The PACIFIC PORTFOLIO invests in a statistically
                         selected sample of the more than 500 stocks included in
                         the MSCI-Pacific (Free) Index, an index of equity
                         securities of Pacific Basin companies. The MSCI-Pacific
                         (Free) Index is dominated by the Japanese stock market,
                         which represented 74% of the market capitalization of
                         the Index as of December 31, 1996.
    
 
   
                         The Pacific, European and Emerging Markets Portfolios
                         are each expected to invest in approximately 400 stocks
                         or more. Stocks are selected for inclusion in each
                         Portfolio based on country, market capitalization,
                         industry weightings, and fundamental characteristics
                         such as return variability, earnings valuation, and
                         yield. Each Portfolio is constructed to have aggregate
                         investment characteristics similar to those of its
                         respective index. In order to parallel the performance
                         of its respective index, each Portfolio will invest in
                         each country in approximately the same percentage as
                         the country's weight in the index. The correlation
                         between the performance of each Portfolio and its
                         respective index is expected to be at least 0.95. (A
                         correlation of 1.00 would be perfect correlation.)
    
 
   
                         The EMERGING MARKETS PORTFOLIO invests in a
                         statistically selected sample of the approximately 500
                         stocks included in the MSCI -- Select Emerging Markets
                         (Free) Index, an index of equity securities of
                         companies located in the countries of 14 emerging
                         markets. Four countries, Malaysia, South Africa, Hong
                         Kong and Brazil, represent a majority of the
                         MSCI -- Select Emerging Markets (Free) Index, with 19%,
                         12%, 14% and 14% of the market capitalization of the
                         Index, respectively, as of December 31, 1996. The
                         fourteen countries of the Index and their percentage
                         weightings as of December 31, 1996, were:
    
 
   
<TABLE>
                        <S>                     <C>       <C>                     <C>
                        Greece.................   1.3%    Hong Kong.............. 13.6%
                        Portugal...............   2.2%    Indonesia..............  6.1%
                        Turkey.................   1.5%    Malaysia............... 18.6%
                        EUROPE.................   5.0%    Philippines (Free).....  3.8%
                                                          Singapore..............  6.4%
                        Argentina..............   3.8%    Thailand...............  5.4%
                        Brazil.................  13.8%    Israel.................  2.3%
                        Mexico (Free)..........   9.0%    ASIA................... 56.2%
                        LATIN AMERICA..........  26.6%    South Africa........... 12.2%
</TABLE>
    
 
   
                         The Index includes only shares that U.S. investors are
                         "free,"
    
   
                         or allowed by law, to purchase and sell and that have
                         sufficient
    
   
                         trading liquidity.
    
 
   
                         The Portfolio is expected to invest in approximately
                         500 stocks. Stocks are selected for inclusion in the
                         Portfolio in order to form a statistically
                         representative sample corresponding to the MSCI-Select
                         Emerging Markets Free Index. The Portfolio is
                         constructed to have aggregate
    
 
                                       25
<PAGE>   29
 
   
                         investment characteristics (based on country, market
                         capitalization and industry weightings), fundamental
                         characteristics (such as return variability, earnings
                         valuation and yield) and liquidity measures, similar to
                         those of its Index.
    
 
   
                         The Portfolio's policy is to remain 95% invested in
                         common stocks. The remaining 5% of the Portfolio will
                         be invested in cash reserves in order to maintain a
                         higher degree of portfolio liquidity to meet daily
                         redemption requests.
    
 
   
                         Each of the Portfolio's policy is to remain fully
                         invested in common stocks. Under normal circumstances
                         at least 80% of the assets of each Portfolio will be
                         invested in stocks that are represented in its
                         respective index. Since the Total International
                         Portfolio will invest primarily in shares of the
                         underlying Portfolios, at least 80% of its equity
                         exposure will be to stocks that are included in the
                         MSCI -- EAFE + Select EMF Index. Each Portfolio may
                         invest in certain short-term fixed income securities
                         such as cash reserves, although cash or cash
                         equivalents are normally expected to represent less
                         than 1% of each Portfolio's assets. Each Portfolio may
                         also invest up to 50% of its assets in stock futures
                         contracts, options, warrants, convertible securities,
                         and swap agreements in order to invest uncommitted cash
                         balances, maintain liquidity to meet shareholder
                         redemptions, or minimize trading costs. Any investment
                         in futures contracts, options, warrants, convertible
                         securities or swap agreements over 20% of each
                         Portfolio's assets would be made in emergency
                         situations, for short-term purposes.
    
 
   
                         These Portfolios will not invest in cash reserves,
                         futures contracts, options or warrants as part of a
                         temporary defensive strategy, such as lowering a
                         Portfolio's investment in common stocks, to protect
                         against potential stock market declines. The Portfolios
                         intend to remain fully invested, to the extent
                         practicable, in a pool of securities which will
                         approximate the investment characteristics of their
                         respective indexes. The Portfolios may also enter into
                         forward foreign currency exchange contracts in order to
                         maintain the same currency exposure as their respective
                         indexes, but not as part of a defensive strategy to
                         protect against fluctuations in exchange rates.
    
 
   
                         See "Implementation of Policies" for a description of
                         these and other investment practices of the Portfolios.
    
  ------------------------------------------------------------------------------
 
   
VANGUARD TOTAL
INTERNATIONAL
PORTFOLIO                The TOTAL INTERNATIONAL PORTFOLIO allocates its assets
                         among the European, Pacific and Emerging Markets
                         Portfolios of Vanguard International Equity Index Fund
                         based on each market segment's contribution to the
                         market capitalization of the Morgan Stanley Capital
                         International -- Europe, Australasia, and Far East +
                         Select Emerging Markets (Free) Index. As of December
                         31, 1996, the European and Pacific markets contributed
                         approximately 49% and 38%, respectively, and the
                         Emerging Markets contributed 13% to the Index's market
                         capitalization.
    
 
                         See "Implementation of Policies" for a description of
                         these and other investment practices of the Portfolio.
- --------------------------------------------------------------------------------
 
                                       26
<PAGE>   30
 
   
INVESTMENT
RISKS
EACH PORTFOLIO IS
SUBJECT TO MARKET RISK   As mutual funds investing primarily in common stocks,
                         Vanguard Balanced Index Fund, the Portfolios of
                         Vanguard Index Trust and Vanguard International Equity
                         Index Fund and Vanguard Total International Portfolio
                         are subject to MARKET RISK -- i.e., the possibility
                         that common stock prices will decline over short or
                         even extended periods. Both U.S. and foreign stock
                         markets tend to be cyclical, with periods when stock
                         prices generally rise and periods when prices generally
                         decline.
    
 
   
                         Common stocks, as measured by the S&P 500 Index, have
                         provided annual total returns (capital appreciation
                         plus dividend income), averaging +10.8% for all 10-year
                         periods from 1926 to 1996. Average return may not be
                         useful for forecasting future returns in any particular
                         period, as stock returns are quite volatile from year
                         to year.
    
  ------------------------------------------------------------------------------
 
   
BALANCED INDEX
FUND
INVESTORS ARE EXPOSED
TO STOCK MARKET AND
INTEREST RATE RISK       As with any investment program, the Fund entails
                         certain risks. As a mutual fund investing 60% of its
                         assets in common stocks, the Fund is subject to STOCK
                         MARKET RISK -- i.e., the possibility that stock prices
                         in general will decline over short or even extended
                         periods. The stock market tends to be cyclical, with
                         periods when stock prices generally rise and periods
                         when stock prices generally decline.
    
 
   
                         Since the Fund also invests in bonds, investors in the
                         Fund are also exposed to INTEREST RATE RISK -- i.e.,
                         fluctuations in the market value of bonds due to
                         changing interest rates. Bond prices are influenced
                         primarily by changes in the level of interest rates.
                         When interest rates rise, the prices of bonds generally
                         fall; conversely, when interest rates fall, bond prices
                         generally rise. While bonds normally fluctuate less in
                         price than stocks, there have been extended periods of
                         cyclical increases in interest rates that have caused
                         significant declines in bond prices. For example, bond
                         prices fell 48% from December 1976 to September 1981.
                         However, a decline in the market value of bonds may be
                         offset in whole or in part by the high level of income
                         that bonds provide.
    
 
   
                         To a limited extent, the Fund is also subject to CREDIT
                         RISK -- i.e., the likelihood that a bond issuer will
                         fail to make timely payments of interest and principal
                         to the Fund. Such credit risk is expected to be low,
                         however, due to the credit quality and diversification
                         of the Fund's bond investments.
    
 
   
                         From time to time, the stock and bond markets may
                         fluctuate independently of one another. In other words,
                         a decline in the stock market may in certain instances
                         be offset by a rise in the bond market, or vice versa.
                         As a result, the Fund, with its balance of common stock
                         and bond investments, is expected to entail less
                         investment risk (and a potentially lower return) than a
                         mutual fund investing exclusively in common stocks.
    
  ------------------------------------------------------------------------------
 
                                       27
<PAGE>   31
 
   
INDEX TRUST
THE EXTENDED MARKET,
AND SMALL
CAPITALIZATION STOCK
PORTFOLIOS MAY EXHIBIT
GREATER VOLATILITY       Historically, the mid- and small-cap stocks of the
                         Wilshire 4500 and Russell 2000 Indexes (the target
                         indexes for the Extended Market and Small
                         Capitalization Stock Portfolios, respectively) have
                         been more volatile than -- and at times have performed
                         quite differently from -- the large-cap stocks of the
                         S&P 500 Index. This is due to several factors,
                         including less-certain growth and dividend prospects
                         for small companies.
    
 
   
THE VALUE AND
GROWTH PORTFOLIOS
MAY FLUCTUATE
INDEPENDENTLY            Even indexes that are subsets of the S&P 500
                         Index -- such as the S&P/BARRA Value Index and the
                         S&P/BARRA Growth Index (the target indexes for the
                         Value and Growth Portfolios) -- will not perform in the
                         same way as the broader S&P 500 Index. Historically,
                         stocks of the S&P/BARRA Value Index have been less
                         volatile than the stocks found in the broader S&P 500
                         Index Stocks of the S&P/BARRA Growth Index, on the
                         other hand, have displayed somewhat greater short-term
                         volatility than the S&P 500 Index's stocks. Historical
                         performance aside, however, both value and growth
                         stocks have the potential to be more volatile than the
                         broader market.
    
  ------------------------------------------------------------------------------
 
INTERNATIONAL
EQUITY INDEX FUND
INTERNATIONAL STOCKS
MAY EXHIBIT GREATER
VOLATILITY THAN
U.S. STOCKS              Investments in foreign stock markets can be as
                         volatile, if not more volatile, than investments in
                         U.S. markets.
 
   
                         The MSCI-Europe Index has provided annual total
                         returns, averaging +15.8% for all 10-year periods from
                         1969-1996, and the MSCI-Pacific Index has provided
                         annual total returns, averaging +17.1% during the same
                         periods. By comparison, the average annual total return
                         of U.S. stocks during this same period was +13.2% (as
                         measured by the Standard & Poor's 500 Composite Stock
                         Price Index). Note, however, that the period from 1969
                         to 1996 was a very favorable one for foreign stock
                         market investing. The figures on total return and stock
                         market volatility are provided here only as a guide to
                         potential market risk, and may not be useful for
                         forecasting future returns in any particular period.
    
 
   
THE JAPANESE STOCK
MARKET IS A MAJOR
COMPONENT OF THE
PACIFIC INDEX            Investors should realize that Japanese securities
                         comprised 74% of the MSCI-Pacific (Free) Index as of
                         December 31, 1996, and that therefore stocks of
                         Japanese companies will represent a correspondingly
                         large component of the Pacific Portfolio's investment
                         assets. Such a large investment in the Japanese stock
                         market may entail a higher degree of risk than with
                         more diversified international portfolios, especially
                         considering that by fundamental measures of corporate
                         valuation, such as its high price-earnings ratios and
                         low dividend yields, the Japanese market as a whole may
                         appear expensive relative to other world stock markets.
    
 
   
STOCKS FROM THREE
COUNTRIES DOMINATE
THE EUROPE INDEX         Stocks from the United Kingdom, Germany and France
                         comprised 34%, 14% and 12% of the MSCI-Europe Index,
                         respectively, as of December 31, 1996. The remaining 11
                         countries in the MSCI-Europe Index have much less
                         significant capitalization weightings in the Index and
                         will therefore have much less impact on the total
                         return of the Index and the European Portfolio.
    
 
                                       28
<PAGE>   32
 
EMERGING MARKETS
MAY EXHIBIT GREATER
VOLATILITY THAN
DEVELOPED MARKETS        Emerging markets, such as those invested in by the
                         Emerging Markets Portfolio, are associated with
                         substantial investment risks. These risks include
                         market volatility, investment illiquidity, currency
                         risk, political instability and unexpected changes in
                         economic policy including capital controls,
                         expropriation, taxes and hyper-inflation.
 
   
                         Investors should be aware that emerging markets can be
                         substantially more volatile than both U.S. and more
                         developed foreign markets. For example, from 1989-1996,
                         the average positive monthly return for the Wilshire
                         5000 Index, a broad measure of the U.S. equity market,
                         was +3.1%. The average negative monthly return for the
                         Wilshire 5000 Index was -2.6%. In contrast, from
                         1989-1996, the average positive monthly return of the
                         Morgan Stanley Capital International Emerging Markets
                         Free Index, a widely quoted emerging market benchmark,
                         was +4.5%; while the average negative monthly return
                         was -4.3%.
    
 
INVESTMENT ILLIQUIDITY
RISK                     Volatility in emerging markets may be exacerbated by
                         illiquidity. Average daily trading volume in all of the
                         emerging markets combined is a small fraction of the
                         average daily volume of the U.S. market. Small trading
                         volumes may result in investors being forced to
                         purchase securities at substantially higher prices than
                         the current market, or sell securities at much lower
                         prices than the current market.
  ------------------------------------------------------------------------------
 
VANGUARD TOTAL
INTERNATIONAL
PORTFOLIO                Because it invests its assets in the Europe, Pacific,
                         and Emerging Markets Portfolios of Vanguard
                         International Equity Index Fund, the Total
                         International Portfolio is subject to the same risks,
                         in varying degrees.
 
   
INTERNATIONAL STOCKS
ALSO EXPOSE INVESTORS
TO CURRENCY AND OTHER
RISKS                    For U.S investors, the returns of foreign investments,
                         such as those held by the three Portfolios, are
                         influenced by not only the returns on foreign common
                         stocks themselves, but also by the returns on the
                         currencies in which the stocks are denominated.
                         Currency risk is the risk that changes in foreign
                         exchange rates will affect, favorably or unfavorably,
                         the value of foreign securities held by a Portfolio. In
                         a period when the U.S. dollar generally rises against
                         foreign currencies, the returns on foreign stocks for a
                         U.S. investor will be diminished. By contrast, in a
                         period when the U.S. dollar generally declines, the
                         returns on foreign stocks will be enhanced. Currency
                         risk in emerging markets may be exacerbated by
                         unexpected exchange rate devaluations.
    
 
   
                         Other risks and considerations of international
                         investing include: differences in accounting, auditing
                         and financial reporting standards; generally higher
                         transaction costs on foreign portfolio transactions;
                         small trading volumes and generally lower liquidity of
                         foreign stock markets, which may result in greater
                         price volatility; foreign withholding taxes payable on
                         a Portfolio's foreign securities, which may reduce
                         dividend income payable to shareholders; the
                         possibility of expropriation or confiscatory taxation;
                         adverse change in investment or exchange control
                         regulations; difficulty in obtaining a judgment from a
                         foreign court; political instability which could affect
                         U.S. investment in foreign countries; and potential
                         restriction on the flow of international capital.
    
  ------------------------------------------------------------------------------
 
                                       29
<PAGE>   33
 
BOND INDEX FUND
THE PORTFOLIOS ARE
SUBJECT TO INTEREST
RATE RISK                INTEREST RATE RISK is the potential for fluctuations in
                         bond prices due to changing interest rates. As a rule,
                         bond prices vary inversely with interest rates. If
                         interest rates rise, bond prices generally decline; if
                         interest rates fall, bond prices generally rise. In
                         addition, for a given change in interest rates,
                         longer-maturity bonds fluctuate more in price than
                         shorter-maturity bonds. To compensate investors for
                         these larger fluctuations, longer-maturity bonds
                         usually offer higher yields than shorter-maturity
                         bonds, other factors, including credit quality, being
                         equal.
 
                         These basic principles of bond prices also apply to
                         U.S. Government securities. A security backed by the
                         "full faith and credit" of the U.S. Government is
                         guaranteed only as to its stated interest rate and face
                         value at maturity, not its current market price. Just
                         like other fixed-income securities, government-
                         guaranteed securities will fluctuate in value when
                         interest rates change.
 
                         The TOTAL BOND MARKET and INTERMEDIATE-TERM BOND
                         PORTFOLIOS maintain an intermediate-term average
                         weighted maturity, and are therefore subject to a
                         moderate to high level of interest rate risk. Interest
                         rate risk for the SHORT-TERM BOND PORTFOLIO should be
                         modest. Because of the short-term average weighted
                         maturities, the Portfolio is expected to exhibit low to
                         moderate price fluctuations as interest rates change.
                         The LONG-TERM BOND PORTFOLIO is exposed to substantial
                         interest rate risk. The Portfolio is expected to have
                         an average maturity in excess of 15 years which exposes
                         it to high to very high price fluctuations due to
                         changing interest rates.
 
THE PORTFOLIOS ARE
SUBJECT TO INCOME RISK   INCOME RISK is the potential for a decline in a
                         Portfolio's income due to falling market interest
                         rates. In relative terms, income risk will be higher
                         for the Fund's shorter-term Portfolios and lower for
                         the Fund's longer-term Portfolios.
 
THE LONG-TERM BOND
PORTFOLIO IS SUBJECT TO
CALL RISK                An additional risk associated with long-term corporate
                         bonds is call risk. CALL RISK is the possibility that
                         corporate bonds held by the Portfolio will be repaid
                         prior to maturity. Call provisions, common in many
                         corporate bonds, allow bond issuers to redeem bonds
                         prior to maturity (at a specific price). When interest
                         rates are falling, bond issuers often exercise these
                         call provisions, paying off bonds that carry high
                         stated interest rates and often issuing new bonds at
                         lower rates. For the Portfolio, the result would be
                         that bonds with high interest rates are "called" and
                         must be replaced with lower-yielding instruments. In
                         these circumstances, the income of the Portfolio would
                         decline. Reflecting these additional credit and call
                         risks, the corporate portion of the portfolio will
                         generally offer higher yields than the government
                         portion.
 
   
THE TOTAL BOND
MARKET PORTFOLIO IS
SUBJECT TO
PREPAYMENT RISK          As a mutual fund investing a portion of its assets in
                         mortgage-backed securities (see chart on page 21), the
                         Total Bond Market Portfolio is subject to prepayment
                         risk to a limited extent. PREPAYMENT RISK is the
                         possibility that, during periods of declining interest
                         rates, the principal invested in high-yielding
                         mortgage-backed securities will be repaid earlier than
                         scheduled, and the Fund will be forced to reinvest the
                         unanticipated payments at generally lower interest
                         rates.
    
 
                                       30
<PAGE>   34
 
                         Prepayment risk has two important effects on the
                         Portfolio. First, when interest rates fall and
                         principal prepayments are reinvested at lower interest
                         rates, the income that the Portfolio derives from
                         mortgage-backed securities is reduced. Second, like
                         other fixed-income securities, mortgage-backed
                         securities generally decline in price when interest
                         rates rise. However, because of prepayment risk,
                         mortgage-backed securities (and thus in part the share
                         price of the Portfolio and the value of the Index) will
                         not enjoy as large a gain in market value as ordinary
                         bonds when interest rates fall. In part to compensate
                         for prepayment risk, mortgage-backed securities
                         generally offer higher yields than bonds of comparable
                         credit quality and maturity.
 
CREDIT RISK IS EXPECTED
TO BE LOW                CREDIT RISK is the possibility that an issuer of
                         securities held by a Portfolio will be unable to make
                         payments of either interest or principal. The credit
                         risk of a Portfolio is a function of the credit quality
                         of its underlying securities.
 
   
                         The credit quality of each Portfolio is expected to be
                         very high, and thus credit risk should be low. As of
                         December 31, 1996, the average quality, as rated by
                         Moody's Investors Service, Inc., of each Portfolio's
                         benchmark index was as follows:
    
 
<TABLE>
                            <S>                                               <C>
                            Aggregate Bond Index.............................  Aaa
                            Short-Term Bond Index............................  Aaa
                            Intermediate-Term Bond Index.....................  Aa1
                            Long-Term Bond Index.............................  Aa2
</TABLE>
 
                         To a limited extent, the Portfolios are also exposed to
                         event risk, the possibility that corporate fixed-income
                         securities held by the Portfolios may suffer a
                         substantial decline in credit quality and market value
                         due to a corporate restructuring. Corporate
                         restructurings, such as mergers, leveraged buyouts,
                         takeovers or similar events, are often financed by a
                         significant expansion of corporate debt. As a result of
                         the added debt burden, the credit quality and market
                         value of a firm's existing debt securities may decline
                         significantly. While event risk may be high for certain
                         corporate and international (dollar-denominated)
                         securities held by the Portfolios, event risk for each
                         Portfolio in the aggregate should be low because of
                         each Portfolios diversified holdings and the small
                         percentage of the Portfolio assets invested in these
                         securities.
 
   
                         The corporate substitution strategy used by the Fund
                         (see discussion on page 21) will increase credit risk
                         somewhat, as short-term investment grade corporate
                         bonds are substituted for U.S. Treasury bonds and
                         notes; however, owing to the diversified nature of the
                         Portfolios, and policies limiting the maturity and
                         maximum amount of substitutions, the overall credit and
                         event risk of the Portfolio is expected to be low.
    
 
NO CURRENCY RISK IN
ANY PORTFOLIO            While each of the chosen Lehman Index benchmarks do
                         have limited exposure to international bonds, there is
                         no currency risk associated with the investments since
                         they are all dollar-denominated.
- --------------------------------------------------------------------------------
 
WHO SHOULD
INVEST                   The Funds offer investors the advantage of a "passive"
                         approach to investing. These include low investment
                         costs, exceptional diversification among a wide range
                         of stocks and bonds, minimal portfolio
 
                                       31
<PAGE>   35
 
                         turnover, and relative predictability. Unlike other
                         mutual funds, which generally attempt to "beat" market
                         averages with often unpredictable results, the
                         Portfolios of the Funds seek to "match" the performance
                         of their underlying indexes and thus are expected to
                         provide a highly predictable return relative to these
                         benchmarks.
 
                         However, shareholders should expect to be fully exposed
                         to the market risks inherent in investing in stocks and
                         bonds. As the prices of stocks and bonds may be
                         volatile, only investors able to tolerate short-term,
                         possibly substantial fluctuations in the value of their
                         investment, brought about by generally declining stock
                         or bond prices, should contemplate an investment in the
                         Funds.
 
                         Investors may wish to reduce the potential risk of
                         investing in a Portfolio by purchasing shares on a
                         regular, periodic basis (dollar-cost averaging) rather
                         than making an investment in one lump sum.
 
                         The Funds are intended to be a long-term investment
                         vehicle and not designed to provide investors with a
                         means of speculating on short-term market movements.
                         Investors who engage in excessive account activity
                         generate additional costs which are borne by all
                         shareholders. In order to minimize such costs the Funds
                         have adopted the following policies. The Funds reserve
                         the right to reject any purchase request (including
                         exchange purchases from other Vanguard portfolios) that
                         is reasonably deemed to be disruptive to efficient
                         portfolio management, either because of the timing of
                         the investment or previous excessive trading by the
                         investor. Additionally, the Funds have adopted exchange
                         privilege limitations as described in the section
                         "Exchange Privilege Limitations." Finally, the Funds
                         reserve the right to suspend the offering of their
                         shares.
 
                         Investors should not consider an investment in any one
                         Fund a complete investment program, but should maintain
                         holdings of securities with different risk
                         characteristics -- including common stocks, bonds and
                         money market instruments.
  ------------------------------------------------------------------------------
 
   
BOND INDEX FUND
INVESTORS SEEKING TO
PARTICIPATE IN THE
"BOND MARKET" AS A
WHOLE OR ITS VARIOUS
MATURITY SEGMENTS        The Portfolios are designed for individual and
                         institutional investors seeking well-diversified,
                         low-cost ways to participate in the U.S. fixed-income
                         markets. The Portfolios will be essentially fully
                         invested at all times. Because the Total Bond Market
                         Portfolio will represent all major sectors of the
                         investment grade fixed-income securities market, the
                         Portfolio is a suitable vehicle for those investors
                         seeking ownership in the "bond market" as a whole,
                         without regard to particular sectors. The Short-Term
                         Bond, Intermediate-Term Bond and Long-Term Bond
                         Portfolios are suitable vehicles for those investors
                         seeking ownership in specific maturity segments of the
                         "bond market." Each Portfolio concentrates on bonds of
                         various maturities as illustrated in the chart on page
                         21. Because of the risks associated with bond
                         investments, each Portfolio is intended to be a
                         long-term investment vehicle and is not designed to
                         provide investors with a means of speculating on short-
                         term bond market movements.
    
 
                         As with all longer-term, fixed-income investments, the
                         share price of the Total Bond Market, Intermediate-Term
                         Bond and Long-Term Bond Portfolios will vary, with the
                         Long-Term Bond Portfolio expected to
 
                                       32
<PAGE>   36
 
   
                         exhibit the greatest volatility. Share price volatility
                         should be significantly less for the Short-Term Bond
                         Portfolio. Credit risk should be minimal for each
                         Portfolio. The investment risks are described on page
                         30.
    
 
                         The Portfolios are also suitable for those investors
                         with common stock holdings who are seeking a
                         complementary fixed-income investment to create a more
                         balanced asset mix. Because of potential share price
                         fluctuations, the Portfolios may be inappropriate for
                         investors who have short-term objectives or who require
                         stability of principal.
  ------------------------------------------------------------------------------
 
BALANCED INDEX
FUND
INVESTORS SEEKING A
BALANCE BETWEEN
CURRENT INCOME AND
CAPITAL GROWTH           The Fund is designed for conservative investors seeking
                         a long-term investment offering both current income and
                         the potential for capital growth. By balancing its
                         investments among common stocks and bonds, the Fund is
                         expected to provide lower investment risk and share
                         price volatility than a mutual fund which invests
                         exclusively in common stocks. The balanced investment
                         approach of the Fund tends to reduce exposure to stock
                         and bond market risks; it does not eliminate them. The
                         Fund is thus suitable for investors who wish to gain
                         exposure to the potential capital growth provided by
                         the stock market, while limiting investment risk. Such
                         a balanced investment program might be particularly
                         well-suited to long-term investment objectives such as
                         retirement savings.
  ------------------------------------------------------------------------------
 
INDEX TRUST
LONG-TERM INVESTORS
SEEKING A "PASSIVE"
APPROACH FOR INVESTING
IN COMMON STOCKS         All six Portfolios of the Trust are designed for
                         long-term investors seeking the advantages of investing
                         in a diversified portfolio of common stocks.
 
                         Four Portfolios of the Trust provide a vehicle for
                         investing in a broad market index:
 
                         - The 500 PORTFOLIO is designed for investors seeking
                           to replicate the total return of the S&P 500 Index,
                           an index emphasizing large capitalization common
                           stocks.
 
                         - The EXTENDED MARKET PORTFOLIO is designed for
                           investors seeking to replicate the total return of
                           the Wilshire 4500 Index, an index consisting of
                           small- and medium-capitalization companies.
 
                         - The TOTAL STOCK MARKET PORTFOLIO is designed for
                           investors seeking to replicate the total return of
                           the Wilshire 5000 Index, an index consisting of all
                           U.S. stocks that trade on a regular basis on either
                           the New York or American Stock Exchange or the NASDAQ
                           over-the-counter market. The Total Stock Market
                           Portfolio will therefore reflect the performance of
                           the entire U.S. stock market.
 
                         - The SMALL CAPITALIZATION STOCK PORTFOLIO is designed
                           for investors seeking to replicate the total return
                           of the Russell 2000 Small Stock Index, an index
                           consisting of approximately 2,000
                           small-capitalization stocks.
 
                                       33
<PAGE>   37
 
                         Two Portfolios are designed for investors seeking to
                         emphasize certain investment characteristics while
                         continuing to utilize a "passive" investment approach:
 
                         - The VALUE PORTFOLIO is designed for investors seeking
                           to replicate the total return of the S&P/BARRA Value
                           Index, an index consisting of companies of the S&P
                           500 Index with lower than average market price to
                           book value ratios. Such a "value-oriented" Portfolio
                           may be appropriate for more conservative stock market
                           investors who are seeking higher dividend income and
                           somewhat below average stock market volatility.
 
                         - The GROWTH PORTFOLIO is designed for investors
                           seeking to replicate the total return of the
                           S&P/BARRA Growth Index, an index consisting of
                           companies of the S&P 500 Index with higher than
                           average market price to book value ratios. Such a
                           "growth-oriented" Portfolio may be appropriate for
                           investors who have little need for current dividend
                           income and who can tolerate somewhat above average
                           stock market volatility.
 
                         Taken together in appropriate proportions, the Value
                         and Growth Portfolios are expected to approximate the
                         total returns achieved by the 500 Portfolio.
  ------------------------------------------------------------------------------
 
INTERNATIONAL
EQUITY INDEX FUND
LONG-TERM INVESTORS
SEEKING TO INVEST
IN INTERNATIONAL
COMMON STOCKS            The Portfolios are designed for investors who seek a
                         low-cost "passive" approach for investing in a broadly
                         diversified portfolio of international common stocks.
                         Unlike other equity mutual funds, which generally seek
                         to "beat" market averages with often unpredictable
                         results, the Portfolios of the Fund seek to "match"
                         their respective indexes and thus are expected to
                         provide a predictable return relative to their
                         respective benchmarks. In particular, the European
                         Portfolio is designed for investors seeking to
                         approximate the total investment results (before fund
                         expenses and withholding taxes) of the MSCI-Europe
                         (Free) Index, a diversified index of European common
                         stocks. The Pacific Portfolio is designed for investors
                         seeking to approximate the total investment results
                         (before fund expenses and withholding taxes) of the
                         MSCI-Pacific (Free) Index, a diversified index of
                         Pacific Basin common stocks.
 
   
                         The European and Pacific Portfolios are also suitable
                         for investors seeking to create a portfolio which
                         parallels the performance of the MSCI-EAFE (Free)
                         Index, a broadly diversified index consisting of over
                         1,000 international equity securities. By investing in
                         the two portfolios in the appropriate percentages (44%
                         in the Pacific Portfolio and 56% in the European
                         Portfolio as of December 31, 1996), a portfolio
                         approximating the investment characteristics of
                         MSCI-EAFE (Free) may be created.
    
 
                         The Emerging Markets Portfolio is designed for
                         investors seeking to approximate the total investment
                         results (before fund expenses and withholding taxes) of
                         the MSCI-Select Emerging Markets Free Index, a
                         diversified index of common stocks of emerging market
                         countries.
  ------------------------------------------------------------------------------
 
                                       34
<PAGE>   38
 
   
TOTAL
INTERNATIONAL
PORTFOLIO                The Total International Portfolio is designed for
                         investors seeking to approximate investment results
                         that parallel those of the MSCI-EAFE + Select EMF Index
                         through a combination of the Europe, Pacific, and
                         Emerging Markets Portfolios of Vanguard International
                         Equity Index Fund.
    
- --------------------------------------------------------------------------------
 
IMPLEMENTATION
OF POLICIES              The Portfolios follow a variety of investment practices
                         in an effort to duplicate the total return of their
                         respective indexes.
  ------------------------------------------------------------------------------
 
   
BOND INDEX FUND
THE PORTFOLIOS INVEST
IN FIXED INCOME
SECURITIES               Each Portfolio will invest at least 80% or more of its
                         assets in securities included in its benchmark Index.
                         The Indexes measure the total investment return
                         (capital change plus income) provided by a universe of
                         fixed-income securities, weighted by the market value
                         outstanding of each security. The securities included
                         in each Index generally meet the following criteria, as
                         defined by Lehman Brothers: an outstanding market value
                         of at least $100 million; and investment grade
                         quality -- i.e., rated a minimum of Baa by Moody's
                         Investors Service, Inc. or BBB by Standard & Poor's
                         Corporation. The maturities of securities included in
                         each index will vary as described on page 21.
    
 
   
THE PORTFOLIOS USE A
"SAMPLING" TECHNIQUE     The Portfolios will be unable to hold all of the
                         individual issues which comprise the Indexes because of
                         the large number of securities involved. Instead, each
                         Portfolio will hold a representative sample of the
                         securities in its respective Index, selecting one or
                         two issues to represent entire "classes" or types of
                         securities in the Index. Each Portfolio will be
                         constructed so as to match the composition of its
                         benchmark index as described below after adjusting for
                         the corporate substitution strategy described on page
                         21 for the Total Bond Market and Short-Term Bond
                         Portfolios.
    
 
                         At the broadest level, each Portfolio will seek to hold
                         securities which reflect the weighting of the major
                         asset classes in its respective index. For the Total
                         Bond Market Portfolio, these classes include U.S.
                         Treasury and agency securities, corporate bonds, and
                         mortgage-backed securities. For the Short-Term Bond,
                         Intermediate-Term Bond and Long-Term Bond Portfolios,
                         the two major classes of securities include U.S.
                         Treasury and agency securities and corporate bonds.
 
                         Such a sampling technique is expected to be an
                         effective means of substantially duplicating the income
                         and capital returns provided by each Index. Over time,
                         the correlation between the performance of the Fund and
                         the Index is expected to be 0.95 or higher. A
                         correlation of 1.00 would indicate perfect correlation,
                         which would be achieved when the net asset value of a
                         Portfolio, including the value of its dividend and
                         capital gain distributions, increases or decreases in
                         exact proportion to changes in the Index. Because the
                         Portfolios of the Fund incur operating expenses, as
                         opposed to their respective indexes, which do not, a
                         perfect correlation of 1.00 is unlikely to be achieved.
 
THE TOTAL BOND
MARKET PORTFOLIO MAY
INVEST IN MORTGAGE-
BACKED SECURITIES        As part of its effort to duplicate the investment
                         performance of its Index, the Total Bond Market
                         Portfolio may invest in mortgage-backed securities.
                         Mortgage-backed securities represent an interest in an
                         underlying pool of mortgages. Unlike ordinary
                         fixed-income securities,
 
                                       35
<PAGE>   39
 
                         which generally pay a fixed rate of interest and return
                         principal upon maturity, mortgage-backed securities
                         repay both interest income and principal as part of
                         their periodic payments. Because the mortgages
                         underlying mortgage-backed certificates can be prepaid
                         at any time by homeowners or corporate borrowers,
                         mortgage-backed securities give rise to certain unique
                         "prepayment" risks. See "Investment Risks."
 
                         The Total Bond Market Portfolio may purchase
                         mortgage-backed securities issued by the Government
                         National Mortgage Association (GNMA), the Federal Home
                         Loan Mortgage Corporation (FHLMC), the Federal National
                         Mortgage Association (FNMA), and the Federal Housing
                         Authority (FHA). GNMA securities are guaranteed by the
                         U.S. Government as to the timely payment of principal
                         and interest; securities from other
                         Government-sponsored entities are generally not secured
                         by an explicit pledge of the U.S. Government. The
                         Portfolio may also invest in conventional mortgage
                         securities, which are packaged by private corporations
                         and are not guaranteed by the U.S. Government. Mortgage
                         securities that are guaranteed by the U.S. Government
                         are guaranteed only as to the timely payment of
                         principal and interest. The market value of such
                         securities is not guaranteed and may fluctuate.
  ------------------------------------------------------------------------------
 
   
BALANCED INDEX
FUND
THE FUND INVESTS IN
A SAMPLE OF ALL U.S.
COMMON STOCKS            The Fund's common stock investments will be selected
                         from securities included in the Wilshire 5000, an index
                         of all regularly and publicly traded U.S. common stocks
                         that trade on the New York and American Stock Exchanges
                         and in the NASDAQ over-the-counter market.
                         Approximately 7,000 stocks, including large-, medium-,
                         and small-capitalization companies, are included in the
                         Wilshire 5000, which serves as a proxy for the complete
                         U.S. stock market.
    
 
                         Under normal circumstances, the Fund will invest 60% of
                         its net assets in common stocks included in the
                         Wilshire 5000. In an effort to replicate the investment
                         performance of the Wilshire 5000, the Fund's common
                         stock holdings will include approximately 500 of the
                         largest market capitalization stocks in the Index and
                         an additional representative sample of the remaining
                         stocks. The high transaction costs and illiquidity of
                         many of the smaller stocks in the Wilshire 5000 make
                         complete replication of the Index's holding
                         impractical.
 
COMMON STOCKS ARE
SELECTED USING
OPTIMIZATION
TECHNIQUES ("PORTFOLIO
OPTIMIZATION")           The stocks of the Wilshire 5000 included in the Fund
                         are selected using a statistical technique known as
                         "optimization." This process selects stocks for the
                         Fund so that various industry weightings, market
                         capitalizations, and fundamental characteristics (e.g.,
                         price-to-book, price-to-earnings, and debt-to-asset
                         ratios, as well as dividend yields) match those of the
                         Wilshire 5000. For instance, if 10% of the
                         capitalization of the Wilshire 5000 consists of utility
                         companies with relatively large market capitalizations,
                         then the Fund's stock holdings are constructed so that
                         approximately 10% of the Fund's stocks represent
                         utilities with relatively large capitalizations.
 
                         The Fund is not sponsored, endorsed, sold or promoted
                         by Wilshire Associates. Wilshire(R) and Wilshire
                         5000(R) are registered service marks of Wilshire
                         Associates.
 
                                       36
<PAGE>   40
 
   
THE FUND INVESTS IN A
SAMPLE OF ALL U.S.
INVESTMENT GRADE DEBT    Under normal circumstances, the Fund will invest 40% of
                         its net assets in fixed income securities included in
                         the Lehman Brothers Index, an index of U.S.
                         investment-grade, fixed-income securities. More than
                         5,500 individual bond issues, including U.S. Treasury
                         and Government agency securities, corporate debt
                         obligations, and mortgage-backed securities are
                         included in the Lehman Brothers Index.
    
 
   
                         The securities included in the Lehman Brothers Index in
                         which the Fund may invest generally meet the following
                         criteria, as defined by Lehman Brothers: an effective
                         maturity of not less than one year; an outstanding
                         market value of at least $100 million; investment grade
                         quality -- i.e., rated a minimum of Baa by Moody's
                         Investors Service, Inc. or BBB by Standard & Poor's
                         Corporation; and general availability in the
                         marketplace. If a security held in the Fund's portfolio
                         is downgraded to a rating below these minimum
                         standards, the Fund may continue to hold it until such
                         time as the adviser deems it most advantageous to
                         dispose of the security.
    
 
   
BONDS ARE SELECTED
USING A STRATIFIED
SAMPLING TECHNIQUE       The Fund will be unable to hold all of the individual
                         issues which comprise the Lehman Brothers Index because
                         of the large number of securities involved. Instead,
                         the Fund will hold a representative sample of the
                         securities in the Index, selecting a few issues to
                         represent entire "classes" or types of securities in
                         the Index. The Fund will be constructed so as to
                         approximately match the composition of its benchmark
                         index, after adjusting for the corporate substitution
                         policy described on page 21.
    
 
   
                         At the broadest level, and adjusted for the corporate
                         substitution strategy, the Fund will seek to hold
                         securities which reflect the weighting of the major
                         asset classes in the Lehman Brothers Index -- U.S.
                         Treasury and agency securities, corporate bonds, and
                         mortgage-backed securities. For example, if U.S.
                         Treasury and agency securities represent approximately
                         60% of the Index's interest rate risk, then
                         approximately 60% of the Fund's interest rate risk will
                         come from such securities. Similarly, if corporate
                         bonds represent 20% of the interest rate risk of the
                         Index, then they will represent approximately 20% of
                         the interest rate risk of the Fund.
    
 
   
                         Such a sampling technique is expected to be an
                         effective means of substantially duplicating the income
                         and capital returns provided by each index. Over time,
                         the correlation between the performance of the Fund and
                         the Index is expected to be 0.95 or higher. A
                         correlation of 1.00 would indicate perfect correlation,
                         which would be achieved when the net asset value of the
                         Fund, including the value of its dividend and capital
                         gains distributions, increases or decreases in exact
                         proportion to changes in the Index (without taking into
                         consideration the effect of the Fund's common stock
                         holdings). Because the Fund incurs operating expenses,
                         as opposed to its indexes, which do not, a perfect
                         correlation of 1.00 is unlikely to be achieved. The
                         performance of the Fund versus that of its respective
                         index is monitored daily. If a tracking error develops,
                         the Fund is rebalanced to bring it in line with the
                         Index.
    
 
                                       37
<PAGE>   41
 
THE FUND'S RETURNS
SHOULD BE CLOSELY
CORRELATED WITH ITS
UNDERLYING INDEXES       The sampling techniques utilized by the Fund are
                         expected to be an effective means of substantially
                         duplicating the investment performance (dividend income
                         plus capital change) of the Fund's underlying indexes:
                         the Wilshire 5000 (for the 60% of net assets invested
                         in common stocks) and the Lehman Brothers Index (for
                         the 40% of net assets invested in bonds). The
                         correlation between the performance of the Fund's stock
                         and bond investments and the Wilshire 5000 and Lehman
                         Brothers Indexes, respectively, is expected to be at
                         least 0.95.
 
                         Due to the use of sampling techniques, however, neither
                         the stock nor bond holdings of the Fund are expected to
                         track their target benchmarks with the degree of
                         accuracy that complete replication of the indexes would
                         have provided. The principal advantage of this sampling
                         approach is to provide an efficient means of investing
                         in a large universe of stocks and bonds. In particular,
                         the Fund is expected to provide exceptionally broad
                         diversification, and should operate at low costs due to
                         both its "passive" approach to portfolio management and
                         expected low portfolio turnover rate.
  ------------------------------------------------------------------------------
 
INDEX TRUST
THE 500 PORTFOLIO
INVESTS IN ALL 500 S&P
STOCKS                   The 500 Portfolio attempts to duplicate the investment
                         results of the S&P 500 Index by holding all 500 stocks
                         in approximately the same proportions as they are
                         represented in the Index. This indexing technique is
                         known as "complete replication."
 
   
                         The S&P 500 Index is composed of 500 common stocks,
                         which are chosen by Standard & Poor's Corporation on a
                         statistical basis to be included in the Index. The
                         inclusion of a stock in the S&P 500 Index in no way
                         implies that Standard & Poor's Corporation believes the
                         stock to be an attractive investment. The 500
                         securities, most of which trade on the New York Stock
                         Exchange, represented, as of December 31, 1996,
                         approximately 70% of the market value of all U.S.
                         common stocks. Each stock in the S&P 500 Index is
                         weighted by its market value.
    
 
   
                         Because of the market-value weighting, the 50 largest
                         companies in the S&P 500 Index currently account for
                         approximately 47% of the Index. Typically, companies
                         included in the S&P 500 Index are the largest and most
                         dominant firms in their respective industries. As of
                         December 31, 1996, the five largest companies in the
                         Index were: General Electric (2.9%), Coca Cola Company
                         (2.3%), Exxon Corporation (2.2%), Intel Corporation
                         (1.9%), and Microsoft Corporation (1.7%). The largest
                         industry categories were: banks (7.7%), telephone
                         companies (6.6%), pharmaceutical companies (6.4%),
                         international oil companies (5.8%) and computer
                         companies (4.6%).
    
 
   
THE EXTENDED MARKET
PORTFOLIO INVESTS IN
MEDIUM- AND SMALL-
SIZE COMPANY STOCKS      While the S&P 500 Index includes the preponderance of
                         large market capitalization stocks, it excludes most of
                         the medium- and small-size companies which comprise the
                         remaining 30% of the capitalization of the U.S. stock
                         market. The Wilshire 4500 Index consists of all U.S.
                         stocks that are not in the S&P 500 Index and that trade
                         regularly on the New York and American Stock Exchanges
                         as well as in the NASDAQ over-the-counter market. More
                         than 6,800 stocks of medium- and small-capitalization
                         companies are included in the Wilshire 4500 Index.
    
 
                                       38
<PAGE>   42
 
   
                         The Extended Market Portfolio will be unable to hold
                         all of the more than 6,800 issues which comprise the
                         Wilshire 4500 Index because of the costs involved and
                         the illiquidity of many of the securities. Instead, the
                         Portfolio will hold a representative sample of the
                         securities in the Wilshire 4500 Index.
    
 
   
THE TOTAL STOCK
MARKET PORTFOLIO
INVESTS IN A SAMPLE OF
ALL U.S. STOCKS          Neither the S&P 500 Index nor the Wilshire 4500 Index
                         independently represents the U.S. stock market as a
                         whole. The Wilshire 5000 Index, which consists of all
                         regularly and publicly traded U.S. stocks, provides a
                         complete proxy for the U.S. stock market. More than
                         7,300 stocks, including large-, medium-, and
                         small-capitalization companies are included in the
                         Wilshire 5000 Index.
    
 
   
                         In an effort to replicate the investment performance of
                         the Wilshire 5000 Index, the Total Stock Market
                         Portfolio will invest in approximately 2,700 of the
                         largest stocks in the index and an additional
                         representative sample of the remaining stocks. As in
                         the case for the Extended Market Portfolio, the high
                         transaction costs and illiquidity of many of the
                         smaller stocks make complete replication of the
                         Wilshire 4500 Index's holdings impractical.
    
 
                         The Extended Market and Total Stock Market Portfolios
                         are not sponsored, endorsed, sold or promoted by
                         Wilshire Associates. Wilshire(R) and Wilshire 5000(R)
                         are registered service marks of Wilshire Associates.
 
   
THE SMALL
CAPITALIZATION STOCK
PORTFOLIO INVESTS IN
SMALL-SIZE COMPANY
STOCKS                   The Small Capitalization Stock Portfolio attempts to
                         duplicate the investment results of the Russell 2000
                         Index by investing in approximately 1,500 of the 2,000
                         stocks in the Russell 2000 Index. The Russell 2000
                         Index is composed of approximately 2,000
                         small-capitalization common stocks. A company's stock
                         market capitalization is the total market value of its
                         floating outstanding shares. As of December 31, 1996,
                         the average stock market capitalization of the Russell
                         2000 was $550 million. As in the case of the Extended
                         Market Portfolio, the high transaction costs and
                         illiquidity of many of the small stocks contained in
                         the Russell 2000 Index make complete replication of the
                         holdings impractical.
    
 
                         The Portfolio is neither sponsored by nor affiliated
                         with the Frank Russell Company. Frank Russell's only
                         relationship to the Portfolio is the licensing of the
                         use of the Russell 2000 Small Stock Index. Frank
                         Russell Company is the owner of the trademarks and
                         copyrights relating to the Russell indexes.
 
THE EXTENDED MARKET,
TOTAL STOCK MARKET
AND SMALL
CAPITALIZATION STOCK
PORTFOLIOS USE
SAMPLING TECHNIQUES      The stocks of the Wilshire 4500 Index to be included in
                         the Extended Market, Total Stock Market and Small
                         Capitalization Stock Portfolios will be selected
                         utilizing a statistical sampling technique known as
                         "optimization."
 
   
                         This sampling technique, which is described on page 21,
                         is expected to be an effective means of substantially
                         duplicating the income and capital returns of the
                         Extended Market, Total Stock Market and Small
                         Capitalization Stock Portfolios' target benchmarks.
                         Over time, the correlation between the performance of
                         the Extended Market, Total Stock Market and Small
                         Capitalization Stock Portfolios and their respective
                         indexes, the Wilshire 4500 Index, Wilshire 5000 Index
                         and Russell 2000 Index, is expected to be at least
                         0.95. A correlation of 1.00
    
 
                                       39
<PAGE>   43
 
                         would indicate perfect correlation, which would be
                         achieved when the net asset value of a Portfolio,
                         including the value of its dividend and capital gains
                         distributions, increases or decreases in exact
                         proportion to changes in the respective target
                         benchmark.
 
                         Due to the use of the sampling technique, neither the
                         Extended Market Portfolio, Total Stock Market Portfolio
                         nor the Small Capitalization Stock Portfolio is
                         expected to track its benchmark index with the same
                         degree of accuracy as evidenced by the high degree of
                         correlation between the 500 Portfolio and its
                         benchmark. However, the principal advantage of this
                         technique is to provide an efficient means to invest in
                         the universe of stocks. In particular, the three
                         Portfolios are expected to provide broad
                         diversification, and should operate at low costs due
                         both to their "passive" approach to portfolio
                         management and low portfolio turnover rate.
 
THE VALUE AND GROWTH
PORTFOLIOS EMPHASIZE
STOCKS WITH CERTAIN
INVESTMENT
CHARACTERISTICS          In an effort to duplicate the investment results of
                         their respective indexes, the Value and Growth
                         Portfolios will utilize "complete replication," the
                         same indexing technique used for the 500 Portfolio.
                         Specifically, the Value and Growth Portfolios will hold
                         all of the stocks included in the S&P/BARRA Value and
                         Growth Indexes, respectively, in approximately the same
                         proportions as those stocks are represented in the
                         Indexes.
 
   
                         Standard & Poor's Corporation constructs the S&P/BARRA
                         Value and Growth Indexes semi-annually by ranking all
                         common stocks included in the S&P 500 Index by their
                         price-to-book ratios. The resulting list is then
                         divided in half by market capitalization. Those
                         companies representing half of the market
                         capitalization of the S&P 500 Index and having lower
                         price-to-book ratios are included in the S&P/BARRA
                         Value Index; the remaining companies are incorporated
                         in the S&P/BARRA Growth Index. On December 31, 1996,
                         after the semi-annual reconstitution of the indexes,
                         the S&P/BARRA Value Index consisted of 340 common
                         stocks in the S&P 500 Index, while the S&P/BARRA Growth
                         Index consisted of the remaining 160. Each Index
                         represented half of the market capitalization of the
                         S&P 500 Index.
    
 
                         Investment managers may use a number of different
                         methods to classify stocks as "value" or "growth".
                         There may also be other ways to define benchmarks for
                         "value" and "growth" investing. If other methods were
                         applied to the companies comprising the S&P/BARRA Value
                         and Growth Indexes, the classification of the stocks as
                         "growth" or "value" might be different.
 
   
                         Typically, the stocks included in the S&P/BARRA Value
                         Index exhibit above-average dividend yields and lower
                         price-to-book ratios. By comparison, the stocks
                         included in the S&P/BARRA Growth Index exhibit
                         below-average dividend yields and higher price-to-book
                         ratios. As of December 31, 1996, the five largest
                         companies in the S&P/BARRA Value Index were Exxon
                         Corp., Royal Dutch Petroleum Co., IBM, AT&T Corp., and
                         Citicorp, the five largest companies in the S&P/BARRA
                         Growth Index were General Electric Co., Coca Cola Co.,
                         Intel Corp., Microsoft Corp., and Merck & Co., Inc.
    
 
                                       40
<PAGE>   44
 
                         The 500, Value and Growth Portfolios are not sponsored,
                         endorsed, sold or promoted by Standard & Poor's
                         Corporation ("S&P"). S&P makes no representations or
                         warranty, implied or expressed, to the purchasers of
                         the Portfolios or any member of the public regarding
                         the advisability of investing in index funds or the
                         ability of the S&P 500, S&P/BARRA Value and S&P/BARRA
                         Growth Indexes to track general stock market
                         performance or to track the general performance of
                         value and growth stocks. S&P does not guarantee the
                         accuracy and/or the completeness of the S&P 500,
                         S&P/BARRA Value and S&P/BARRA Growth Indexes or any
                         data included herein.
 
                         THE S&P MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO
                         RESULTS TO BE OBTAINED BY LICENSEE, OWNERS OF THE
                         TRUST, ANY PERSON OR ENTITY FROM THE USE OF THE S&P 500
                         OR ANY DATA INCLUDED THEREIN IN CONNECTION WITH THE USE
                         LICENSED HEREUNDER, OR FOR ANY OTHER USE. S&P MAKES NO
                         EXPRESS OR IMPLIED WARRANTIES, AND HEREBY EXPRESSLY
                         DISCLAIMS ALL SUCH WARRANTIES OF MERCHANTABILITY OR
                         FITNESS FOR A PARTICULAR PURPOSE FOR USE WITH RESPECT
                         TO THE S&P 500 OR ANY DATA INCLUDED THEREIN.
 
                         S&P's only relationship to the Portfolios is the
                         licensing of the S&P marks and the S&P 500, S&P/BARRA
                         Value and S&P/BARRA Growth Indexes, which are
                         determined, composed and calculated by S&P without
                         regard to the 500, Value and Growth Portfolios.
  ------------------------------------------------------------------------------
 
   
INTERNATIONAL
EQUITY INDEX FUND
EUROPEAN PORTFOLIO,
PACIFIC PORTFOLIO,
AND EMERGING MARKETS
PORTFOLIO                The MCSI-Europe (Free) Index consists of approximately
                         600 equity securities from Europe, and the MSCI-Pacific
                         (Free) Index consists of more than 500 equity
                         securities from Australia and the Far East, and the
                         MSCI -- Select Emerging Markets (Free) Index consists
                         of some 500 stocks from Asia, Latin America, Africa and
                         Europe. The stocks included in each index are chosen by
                         Morgan Stanley Capital International on a statistical
                         basis. Each stock in MSCI-Europe (Free) and
                         MSCI-Pacific (Free), and MSCI -- Select Emerging
                         Markets (Free) Indexes is weighted according to its
                         market value as a percentage of the total market value
                         of all stocks in the respective index. (A stock's
                         market value equals the number of shares outstanding
                         times the most recent price of the security). The
                         inclusion of a stock in the index in no way implies
                         that Morgan Stanley Capital International believes the
                         stock to be an attractive investment.
    
 
   
THE PORTFOLIOS INVEST
IN INTERNATIONAL
COMMON STOCKS USING
SAMPLING TECHNIQUES
("PORTFOLIO
OPTIMIZATION")           The European, Pacific and Emerging Markets Portfolios
                         will be unable to hold all of the issues that comprise
                         their respective indexes because of the costs involved
                         and the illiquidity of many of the securities. Instead,
                         each Portfolio will attempt to hold a representative
                         sample of approximately 500 or more of the securities
                         in its respective Index, which will be selected
                         utilizing a mathematical technique known as "portfolio
                         optimization." Under this technique, each stock is
                         considered for inclusion in the Portfolio based on its
                         contribution to certain country, capitalization,
                         industry and fundamental investment characteristics.
                         Each Portfolio is constructed so that in the aggregate,
                         each Portfolio's country, capitalization, industry, and
                         fundamental investment characteristics resemble those
                         of its respective Index. Over time,
    
 
                                       41
<PAGE>   45
 
   
                         portfolio composition is altered (or "rebalanced") to
                         reflect changes in the characteristics of the Indexes.
    
 
   
                         Due to the use of this sampling or "portfolio
                         optimization" technique, the Portfolios are not
                         expected to track their benchmark indexes with the same
                         degree of accuracy as large capitalization domestic
                         index funds. Over time, the correlation between the
                         performance of each Portfolio and its respective index
                         is expected to be greater than 0.95. A correlation of
                         1.00 would indicate perfect correlation, which would be
                         achieved when the net asset value of each Portfolio,
                         including the value of its dividend and capital gains
                         distributions, increases or decreases in exact
                         proportion to changes in its respective index.
    
  ------------------------------------------------------------------------------
 
FOUR PORTFOLIOS
MAY ENTER INTO
FORWARD CURRENCY
CONTRACTS                The three Portfolios of Vanguard International Equity
                         Index Fund and the Total International Portfolio may
                         enter into foreign currency forward and foreign
                         currency futures contracts in order to maintain the
                         same currency exposure as their respective index. A
                         Portfolio may not enter into such contracts for
                         speculative purposes, or as a way of protecting against
                         anticipated adverse changes in exchange rates between
                         foreign currencies and the U.S. dollar. Specifically, a
                         Portfolio may invest up to 25% of its assets in foreign
                         currency forward contracts. A foreign currency forward
                         contract is an obligation to purchase or sell a
                         specific currency at a future date, which may be any
                         fixed number of days from the date of the contract
                         agreed upon by the parties, at a price set at the time
                         of the contract. These contracts may be bought or sold
                         to protect the Portfolio to a limited extent against
                         adverse changes in exchange rates between foreign
                         currencies and the U.S. dollar. Such contracts, which
                         protect the value of a Portfolio's investment
                         securities against a decline in the value of a
                         currency, do not eliminate fluctuations in the
                         underlying prices of the securities. They simply
                         establish an exchange rate at a future date. Also,
                         although such contracts tend to minimize the risk of
                         loss due to a decline in the value of the hedged
                         currency, at the same time they tend to limit any
                         potential gain that might be realized should the value
                         of such currency increase.
 
   
THE THREE VANGUARD
INTERNATIONAL EQUITY
INDEX PORTFOLIOS
MAY BORROW MONEY         Each Portfolio may borrow money from a bank up to a
                         limit of 15% of the market value of its assets, but
                         only for temporary or emergency purposes. A Portfolio
                         may borrow money only to meet redemption requests prior
                         to the settlement of securities already sold or in the
                         process of being sold by the Portfolio. To the extent
                         that a Portfolio borrows money prior to selling
                         securities, the Portfolio may be leveraged; at such
                         times, the Portfolio may appreciate or depreciate in
                         value more rapidly than its benchmark index. The
                         Portfolios will repay any money borrowed in excess of
                         5% of the market value of their total assets prior to
                         purchasing additional portfolio securities.
    
 
ALL PORTFOLIOS MAY
INVEST IN SHORT-TERM
MONEY MARKET
INSTRUMENTS              Although they normally seek to remain substantially
                         fully invested in securities in the respective indexes,
                         all Portfolios of the Funds may invest temporarily in
                         certain short-term money market instruments. Such
                         securities may be used to invest uncommitted cash
                         balances or to maintain liquidity to meet shareholder
                         redemptions. These securities
 
                                       42
<PAGE>   46
 
   
                         include: obligations of the United States Government
                         and its agencies or instrumentalities; commercial
                         paper, bank certificates of deposit, and bankers'
                         acceptances; and repurchase agreements collateralized
                         by these securities.
    
 
                         The Funds may use futures contracts, options, warrants,
                         convertible securities and swap agreements.
 
BOND INDEX FUND          The Portfolios of the Fund may utilize bond (interest
                         rate) futures contracts and options to a limited
                         extent. Specifically, each Portfolio may enter into
                         futures contracts provided that not more than 5% of its
                         assets are required as a futures contract deposit. In
                         addition, the Portfolios may enter into futures
                         contracts and options transactions only to the extent
                         that obligations under such contracts or transactions
                         represent not more than 20% of a Portfolio's assets.
  ------------------------------------------------------------------------------
 
   
BALANCED INDEX
FUND                     The Fund may utilize warrants, convertible securities
                         and swap agreements to a limited extent. The Fund's
                         investment in warrants will not exceed more than 5% of
                         its assets (2% with respect to warrants not listed on
                         the New York or American Stock Exchanges). The Fund
                         does not intend to invest more than 5% of its assets in
                         convertible securities.
    
  ------------------------------------------------------------------------------
 
INDEX TRUST              Each Portfolio of the Trust may utilize stock futures
                         contracts, options, warrants, convertible securities
                         and swap agreements to a limited extent. Specifically,
                         each Portfolio may enter into futures contracts and
                         options provided that not more than 5% of its assets
                         are required as a margin deposit for futures contracts
                         or options and provided that not more than 20% of a
                         Portfolio's assets are invested in futures and options
                         at any time. Additionally, the Trust's investment in
                         warrants will not exceed more than 5% of its assets (2%
                         with respect to warrants not listed on the New York or
                         American Stock Exchanges). The Trust does not intend to
                         invest more than 5% of its assets in convertible
                         securities.
  ------------------------------------------------------------------------------
 
   
INTERNATIONAL
EQUITY INDEX FUND
TOTAL
INTERNATIONAL
PORTFOLIO                The Portfolios may utilize stock futures contracts,
                         options, warrants, convertible securities and swap
                         agreements to a limited extent. Specifically, each
                         Portfolio may enter into futures contracts and options
                         provided that not more than 5% of its assets is
                         required as a margin deposit for futures contracts or
                         options. Additionally, the Fund's investment in
                         warrants will not exceed more than 5% of its assets
                         (for the European Portfolio and the Pacific Portfolio
                         2% with respect to warrants not listed on the New York
                         or American Stock Exchanges).
    
 
                         Futures contracts, options, warrants, convertible
                         securities and swap agreements may be used for several
                         reasons: to simulate full investment in the underlying
                         index while retaining a cash balance for fund
                         management purposes, to facilitate trading, to reduce
                         transaction costs or to seek higher investment returns
                         when a futures contract, option, warrant, convertible
                         security or swap agreement is priced more attractively
                         than the underlying equity security or index. While
                         each of these securities can be used as leveraged
                         investments, the Portfolios may not use them to
                         leverage their net assets.
 
                                       43
<PAGE>   47
 
   
FUTURES CONTRACTS,
OPTIONS, WARRANTS,
CONVERTIBLE SECURITIES
AND SWAP AGREEMENTS
POSE CERTAIN RISKS       The risk of loss associated with futures contracts in
                         some strategies can be substantial due both to the low
                         margin deposits required and the extremely high degree
                         of leverage involved in futures pricing. As a result, a
                         relatively small price movement in a futures contract
                         may result in an immediate and substantial loss or
                         gain. When investing in futures contracts, Portfolios
                         of the Vanguard Bond Index Fund will segregate cash or
                         cash equivalents in the amount of the underlying
                         obligation. The Portfolios of the Vanguard Balanced
                         Index Fund, Vanguard Index Trust and Vanguard
                         International Equity Index Fund will not use futures
                         contracts, options, warrants, convertible securities or
                         swap agreements for speculative purposes or to leverage
                         their net assets. Accordingly, the primary risks
                         associated with the use of futures contracts, options,
                         warrants, convertible securities or swap agreements by
                         the Portfolio are: (i) imperfect correlation between
                         the change in market value of the stocks held by the
                         Portfolio and the prices of futures contracts, options,
                         warrants, convertible securities or swap agreements;
                         (ii) possible lack of a liquid secondary market for a
                         futures contract and the resulting inability to close a
                         futures position prior to its maturity date; and (iii)
                         the risk of the counterparty or guaranteeing agent
                         defaulting. The risk of imperfect correlation will be
                         minimized by investing only in those contracts whose
                         behavior is expected to resemble that of the
                         Portfolio's underlying securities. The risk that the
                         Portfolio will be unable to close out a futures
                         position will be minimized by entering into such
                         transactions on an exchange with an active and liquid
                         secondary market. However, options, warrants,
                         convertible securities or swap agreements purchased or
                         sold over-the-counter may be less liquid than
                         exchange-traded securities. Illiquid securities, in
                         general, including swap agreements, may not represent
                         more than 15% of the net assets of the Portfolio.
    
 
   
                         Since there are no futures traded on the S&P/BARRA
                         Value and Growth Indexes, MSCI-Europe (Free), Pacific
                         (Free) Index or the MSCI-Select Emerging Markets (Free)
                         Index, it will be necessary for the Vanguard Index
                         Trust Value and Growth Portfolios and the Portfolios of
                         Vanguard International Equity Index Fund to utilize a
                         composite of other futures contracts to simulate the
                         performance of the Indexes. This process may magnify
                         the "tracking error" of a Portfolio's performance
                         compared to that of its Index, due to lower correlation
                         of the selected futures with its Index. The investment
                         adviser will attempt to reduce this tracking error by
                         investing in futures contracts whose behavior is
                         expected to resemble that of the underlying securities,
                         although there can be no assurance that these selected
                         futures will perfectly correlate with the performance
                         of any of the Indexes.
    
 
   
SWAP AGREEMENTS          Swap agreements are contracts between parties in which
                         one party agrees to make payments to the other party
                         based on the change in market value of a specified
                         index or asset. In return, the other party agrees to
                         make payments to the first party based on the return of
                         a different specified index or asset. Although swap
                         agreements entail the risk that a party will default on
                         its payment obligations thereunder, the Portfolio will
                         minimize this risk by entering into agreements that
                         mark to market no less frequently than quarterly.
                         However, the Portfolio's
    
 
                                       44
<PAGE>   48
 
   
                         daily share price will take into account the daily
                         price movement of any swap agreement entered into by
                         the Portfolio. Swap agreements also bear the risk that
                         the Portfolio will not be able to meet its obligation
                         to the counterparty. This risk will be mitigated by
                         investing the Portfolio in the specific asset for which
                         it is obligated to pay a return.
    
 
ALL PORTFOLIOS MAY
LEND THEIR SECURITIES    All Portfolios may lend their investment securities to
                         qualified institutional investors for either short-term
                         or long-term purposes of realizing additional income.
                         Loans of securities by the Portfolio will be
                         collateralized by cash, letters of credit, or
                         securities issued or guaranteed by the U.S. Government
                         or its agencies. The collateral will equal at least
                         100% of the current market value of the loaned
                         securities.
 
PORTFOLIO TURNOVER FOR
ALL PORTFOLIOS IS
EXPECTED TO BE LOW       Although they generally seek to invest for the long
                         term, each Portfolio of Vanguard Bond Index Fund,
                         Vanguard Balanced Index Fund, Vanguard Index Trust, and
                         Vanguard International Equity Index Fund retains the
                         right to sell securities irrespective of how long they
                         have been held. It is anticipated that the annual
                         portfolio turnover of each Portfolio of the Funds
                         (except Vanguard Balanced Index Fund) will not exceed
                         50%. The annual portfolio turnover rate for the
                         Vanguard Balanced Index Fund is not expected to exceed
                         100%. A turnover rate of 50% would occur, for example,
                         if one half of the securities of a Portfolio were
                         replaced within one year.
- --------------------------------------------------------------------------------
 
   
INVESTMENT
LIMITATIONS
EACH PORTFOLIO HAS
ADOPTED CERTAIN
FUNDAMENTAL
LIMITATIONS              Each Portfolio of the Funds has adopted certain
                         limitations on its investment practices. Specifically,
                         each Portfolio will not:
    
 
   
                         (a)  invest more than 25% of its assets in any one
                              industry (except for the Total International
                              Portfolio which may invest more than 25% of its
                              assets in the investment companies which are its
                              underlying Portfolios);
    
 
                         (b)  borrow money, except that the Funds may borrow
                              from banks (or through reverse repurchase
                              agreements), for temporary or emergency (not
                              leveraging) purposes, including the meeting of
                              redemption requests which might otherwise require
                              the untimely disposition of securities, in an
                              amount not exceeding 15% of the value of the
                              Funds' net assets. Whenever borrowing exceeds 5%
                              of the value of the Funds' net assets, the Funds
                              will not make any additional investments.
 
   
                         Each Portfolio of Vanguard Bond Index Fund will not:
    
 
   
                         (a)  invest more than 5% of its assets in the
                              securities of any single issuer except obligations
                              of the United States Government or government
                              agencies;
    
 
                         (b)  purchase more than 5% of the voting securities of
                              any issuer;
 
                         (c) pledge, mortgage or hypothecate its assets to an
                             extent greater than 5% of the value of its total
                             assets.
 
                                       45
<PAGE>   49
 
                         Each Portfolio of Vanguard Balanced Index Fund,
                         Vanguard Index Trust, and Vanguard International Equity
                         Index Fund, and Vanguard Total International Portfolio
                         will not:
 
   
                         (a)  with respect to 75% of its assets, purchase
                              securities of any issuer (except obligations of
                              the U.S. Government and its instrumentalities) if,
                              as a result, more than 5% of the value of the
                              Fund's assets would be invested in the securities
                              of each issuer; or purchase more than 10% of the
                              voting securities of any issuer.
    
 
                         These investment limitations are considered at the time
                         investment securities are purchased. The limitations
                         described here and in the Statement of Additional
                         Information may be changed for a specific Fund only
                         with the approval of a majority of the shareholders.
- --------------------------------------------------------------------------------
 
   
MANAGEMENT OF
THE FUNDS
VANGUARD ADMINISTERS
AND DISTRIBUTES
THE FUNDS                The Funds are members of The Vanguard Group of
                         Investment Companies, a family of more than 30
                         investment companies with more than 90 distinct
                         portfolios and total assets in excess of $250 billion.
                         Through their jointly owned subsidiary, The Vanguard
                         Group, Inc. ("Vanguard"), they and the other funds in
                         the Group obtain at cost virtually all of their
                         corporate management, administrative, shareholder
                         accounting and distribution services. Vanguard also
                         provides investment advisory services on an at-cost
                         basis to certain Vanguard funds. As a result of
                         Vanguard's unique corporate structure, the Vanguard
                         funds have costs substantially lower than those of most
                         competing mutual funds. In 1996, the average expense
                         ratio (annual costs including advisory fees divided by
                         total net assets) for the Vanguard funds amounted to
                         approximately .29% compared to an average of 1.22% for
                         the mutual fund industry (data provided by Lipper
                         Analytical Services).
    
 
   
                         The Officers of the Funds manage their day to day
                         operations and are responsible to the Funds' Boards of
                         Directors (Trustees). The Directors (Trustees) set
                         broad policies for the Funds and choose their Officers.
                         A list of the Directors (Trustees) and Officers of the
                         Funds and a statement of their present positions and
                         principal occupations during the past five years can be
                         found in each of the Fund's Statements of Additional
                         Information.
    
 
                         Vanguard employs a supporting staff of management and
                         administrative personnel needed to provide the
                         requisite services to the funds and also furnishes the
                         funds with necessary office space, furnishings and
                         equipment. Each fund pays its share of Vanguard's net
                         expenses, which are allocated among the funds under
                         methods approved by the Board of Directors (Trustees)
                         of each fund. In addition, each fund bears its own
                         direct expenses, such as legal, auditing and custodian
                         fees.
 
   
                         Vanguard also provides distribution and marketing
                         services to the Vanguard funds. The funds are available
                         on a no-load basis (i.e., there are no sales
                         commissions or 12b-1 fees). However, each fund bears
                         its share of the Group's distribution costs.
    
- --------------------------------------------------------------------------------
 
                                       46
<PAGE>   50
 
   
INVESTMENT
ADVISERS
VANGUARD'S FIXED
INCOME GROUP
MANAGES SOME OF THE
FUNDS' INVESTMENTS       Each Portfolio of Vanguard Bond Index Fund and the bond
                         portion of Vanguard Balanced Index Fund receive all
                         investment advisory services from Vanguard's Fixed
                         Income Group. The Fixed Income Group provides
                         investment advisory services to more than 40 Vanguard
                         money market and bond portfolios, both taxable and
                         tax-exempt. Total assets under management by Vanguard's
                         Fixed Income Group were $79 billion as of December 31,
                         1996. The Portfolios are not actively managed, but are
                         instead administered by the Fixed Income Group using
                         computerized, quantitative techniques. The Fixed Income
                         Group is supervised by the Officers of the Fund. Ian A.
                         MacKinnon, Senior Vice President of Vanguard, has been
                         in charge of the Group since its inception in 1981.
    
 
                         Mr. MacKinnon is responsible for setting the broad
                         investment strategies employed by the Fund, and for
                         overseeing the portfolio manager who implements those
                         strategies on a day-to-day basis.
 
   
                         The portfolio manager for Vanguard Bond Index Fund and
                         the bond portion of Vanguard Balanced Index Fund is
                         Kenneth E. Volpert, a Principal of Vanguard, who also
                         serves as portfolio manager of the Vanguard Variable
                         Insurance Fund -- High-Grade Portfolio and the bond
                         portion of the Balanced Portfolio. Mr. Volpert began
                         managing the Vanguard Bond Index fund in 1992. For six
                         years prior to joining Vanguard, Mr. Volpert was
                         associated with Mellon Bond Associates.
    
 
                         The Fixed Income Group places all orders for purchases
                         and sales of portfolio securities. Purchases of
                         portfolio securities are made either directly from the
                         issuer or from securities dealers. The Fixed Income
                         Group may sell portfolio securities prior to their
                         maturity if circumstances and considerations warrant
                         and if it believes such dispositions advisable. The
                         Group seeks to obtain the best available net price and
                         most favorable execution for all portfolio
                         transactions.
 
   
VANGUARD'S CORE
MANAGEMENT GROUP
MANAGES SOME OF THE
FUNDS, ON AN AT-COST
BASIS                    Each Portfolio of Index Trust and International Equity
                         Index Fund, the Total International Portfolio, and the
                         equity portion of Balanced Index Fund receive their
                         investment advisory services on an at-cost basis from
                         Vanguard's Core Management Group, which also provides
                         investment advisory services to Vanguard Institutional
                         Index Fund, a portion of the assets of Vanguard/Windsor
                         II and Vanguard Morgan Growth Fund, the Equity Index
                         Portfolio of Vanguard Variable Insurance Fund, Vanguard
                         Tax-Managed Fund, and several indexed separate
                         accounts. Total indexed assets under management as of
                         December 31, 1996 were $57 billion. The Portfolios of
                         the Fund are not actively managed, but are instead
                         administered by the Core Management Group using
                         computerized, quantitative techniques. The Group is
                         supervised by the Officers of the Fund.
    
 
                         In placing portfolio transactions, Vanguard's Core
                         Management Group uses its best judgment to choose the
                         broker most capable of providing the brokerage services
                         necessary to obtain the best available price and most
                         favorable execution at the lowest commission rate. The
                         full range and quality of brokerage services available
                         are considered in making these determinations. In those
                         instances where it is reasonably determined that more
                         than one broker can offer the services needed to obtain
                         the best
 
                                       47
<PAGE>   51
 
                         available price and most favorable execution,
                         consideration may be given to those brokers which
                         supply statistical information and provide other
                         services in addition to execution services to the Fund.
- --------------------------------------------------------------------------------
 
DIVIDENDS,
CAPITAL GAINS
AND TAXES
FOUR PORTFOLIOS PAY
QUARTERLY DIVIDENDS;
TWO PAY DIVIDENDS
ONCE A YEAR              Vanguard Index Trust distributes substantially all of
                         its net investment income in the form of dividends. The
                         500, Total Stock Market, Value and Growth Portfolios
                         pay quarterly dividends, while the Extended Market and
                         Small Capitalization Stock Portfolios pay annual
                         dividends. For all six Portfolios, net capital gains,
                         if any, are distributed annually.
 
                         The Total International Portfolio and each Portfolio of
                         the International Equity Index Fund intend to
                         distribute substantially all of their ordinary income
                         in the form of dividends. The Portfolios pay annual
                         dividends. Capital gains distributions, if any, are
                         also made annually.
 
                         The Balanced Index Fund will distribute substantially
                         all of its net investment income in the form of
                         quarterly dividends.
 
                         Dividends consisting of virtually all of the ordinary
                         income of each Portfolio of Bond Index Fund are
                         declared daily and are payable to shareholders of
                         record at the time of declaration. Such dividends are
                         paid on the first business day of each month. Capital
                         gains distributions, if any, are made annually.
 
                         A Portfolio's dividend and capital gains distributions
                         may be reinvested in additional shares or received in
                         cash. See "Choosing a Distribution Option" for a
                         description of these distribution methods. Shareholders
                         of Bond Index Fund who choose to reinvest their
                         dividend distributions will receive a quarterly (not
                         monthly) confirmation statement.
 
                         Pursuant to the Internal Revenue Code, certain dividend
                         and capital gains distributions declared by each
                         Portfolio during December, if received by shareholders
                         by January 31, are deemed to have been paid by the
                         Funds and received by shareholders on December 31 of
                         the prior year.
 
                         Each Portfolio of the Funds intends to continue to
                         qualify for taxation as a "regulated investment
                         company" under the Internal Revenue Code so that each
                         Portfolio will not be subject to federal income tax to
                         the extent its income is distributed to shareholders.
                         Dividends paid by each Portfolio from net investment
                         income, whether received in cash or reinvested in
                         additional shares, will be taxable to shareholders as
                         ordinary income. For corporate investors, dividends
                         from net investment income will generally qualify in
                         part for the intercorporate dividends-received
                         deduction. However, the portion of the dividends so
                         qualified depends on the aggregate taxable qualifying
                         dividend income received by a Portfolio from domestic
                         (U.S.) sources.
 
   
                         Distributions paid by a Portfolio from long-term
                         capital gains, whether received in cash or reinvested
                         in additional shares, are taxable as long-term capital
                         gains, regardless of the length of time a shareholder
                         has owned shares in the Portfolio. Capital gains
                         distributions are made when a Portfolio realizes net
                         capital gains on sales of portfolio securities during
                         the year. A Portfolio does not seek to realize any
                         particular amount of capital gains during a year;
                         rather, realized gains
    
 
                                       48
<PAGE>   52
 
                         are a by-product of portfolio management activities.
                         Consequently, capital gains distributions may be
                         expected to vary considerably from year to year; there
                         will be no capital gains distributions in years when a
                         Portfolio realizes net capital losses.
 
                         Note that if you elect to receive capital gains
                         distributions in cash, instead of reinvesting them in
                         additional shares, you are in effect reducing the
                         capital at work for you in a Portfolio. Also, keep in
                         mind that if you purchase shares in a Portfolio shortly
                         before the record date for a dividend or capital gains
                         distribution, a portion of your investment will be
                         returned to you as a taxable distribution, regardless
                         of whether you are reinvesting your distributions or
                         receiving them in cash.
 
                         The Funds will notify you annually as to the tax status
                         of dividend and capital gains distributions paid by
                         each Portfolio.
 
EACH PORTFOLIO OF
INTERNATIONAL EQUITY
INDEX FUND MAY
"PASS THROUGH"
FOREIGN TAXES            Each Portfolio may elect to "pass through" to its
                         shareholders the amount of foreign income taxes paid by
                         a Portfolio. The Portfolios will make such an election
                         only if it is deemed to be in the best interests of the
                         shareholders. If this election is made, shareholders of
                         a Portfolio will be required to include in their gross
                         income their pro rata share of foreign taxes paid by
                         the Portfolio. However, shareholders will be able to
                         treat their pro rata share of foreign taxes as either
                         an itemized deduction or a foreign tax credit against
                         U.S. income taxes (but not both) on their federal
                         income tax return.
 
                         Any foreign tax credits would not "pass through" to
                         Total International Portfolio shareholders.
 
A CAPITAL GAIN OR LOSS
MAY BE REALIZED UPON
EXCHANGE OR
REDEMPTION               A sale of shares of a Portfolio is a taxable event, and
                         may result in a capital gain or loss. A capital gain or
                         loss may be realized from an ordinary redemption of
                         shares or an exchange of shares between two mutual
                         funds (or two portfolios of the same fund).
 
   
                         Dividend distributions, capital gains distributions,
                         and capital gains or losses from redemptions and
                         exchanges may be subject to state and local taxes.
    
 
                         Each Portfolio of the Funds is required to withhold 31%
                         of taxable dividends, capital gains distributions, and
                         redemptions paid to shareholders who have not complied
                         with IRS taxpayer identification regulations. You may
                         avoid this withholding requirement by certifying on
                         your Account Registration Form your proper Social
                         Security or Employer Identification number and by
                         certifying that you are not subject to backup
                         withholding.
 
                         Vanguard Index Trust and Vanguard Total International
                         Portfolio are organized as Pennsylvania business trusts
                         and, in the opinion of counsel, are not liable for any
                         income or franchise tax in the Commonwealth of
                         Pennsylvania. The Trust and Portfolio will be subject
                         to Pennsylvania county personal property tax in the
                         county which is the site of its principal office.
                         Shareholders who are Pennsylvania residents will not be
                         subject to county personal property taxes, with the
                         exception
 
                                       49
<PAGE>   53
 
                         of non-exempt holders who are residents of the City and
                         School District of Pittsburgh.
 
                         The International Equity Index, Balanced Index and Bond
                         Index Funds have obtained Certificates of Authority to
                         do business as foreign corporations in Pennsylvania and
                         do business and maintain offices in that state. In the
                         opinion of counsel, the shares of each of the Funds are
                         exempt from Pennsylvania personal property taxes.
 
                         The tax discussion set forth above is included for
                         general information only. Prospective investors should
                         consult their own tax advisers concerning the tax
                         consequences of an investment in the Funds.
- --------------------------------------------------------------------------------
 
   
THE SHARE
PRICE OF
EACH PORTFOLIO           Each Portfolio's share price or 'net asset value' per
                         share is calculated by dividing the total assets of the
                         Portfolio, less all liabilities, by the total number of
                         shares outstanding. The net asset value is determined
                         as of the close of the New York Stock Exchange
                         (generally 4:00 p.m. Eastern time) on each day that the
                         Exchange is open for trading.
    
 
   
                         Portfolio securities that are listed on a securities
                         exchange are valued at the last quoted sales price on
                         the day the valuation is made. Price information on
                         listed securities is taken from the exchange where the
                         security is primarily traded. Securities which are
                         listed on an exchange and which are not traded on the
                         valuation date are valued at the mean of the bid and
                         ask prices. For the 500, Value and Growth Portfolios of
                         Vanguard Index Trust, Vanguard International Equity
                         Index Fund, and each Portfolio of Vanguard Bond Index
                         Fund, unlisted securities for which market quotations
                         are readily available are valued at the latest quoted
                         bid price. For the Extended Market, Total Stock Market
                         and Small Capitalization Stock Portfolios, and Vanguard
                         Balanced Index Fund, unlisted securities for which
                         market quotations are readily available are valued at
                         the mean of the bid and ask prices. Short-term
                         instruments (those with remaining maturities of 60 days
                         or less) may be valued at cost, plus or minus any
                         amortized discount or premium which approximates
                         market. For all Funds, securities for which no current
                         quotations are readily available are valued at fair
                         market value as determined in good faith by the
                         Directors (Trustees). Securities may be valued on the
                         basis of prices provided by a pricing service when such
                         prices are believed to reflect the fair market value of
                         such securities.
    
 
   
                         Each Portfolios's share price can be found daily in the
                         mutual fund listings of most major newspapers under the
                         heading of Vanguard Group.
    
- --------------------------------------------------------------------------------
 
   
GENERAL
INFORMATION              Vanguard Bond Index, Vanguard Balanced Index and
                         Vanguard International Equity Index Funds are organized
                         as Maryland corporations. The Articles of Incorporation
                         permit the Directors to issue 1,000,000,000 shares of
                         common stock of each Fund, with a $.001 par value. The
                         Board of Directors has the power to designate one or
                         more classes ("series") of shares of common stock and
                         to classify or reclassify any unissued shares with
                         respect to such series. Currently, Vanguard Bond Index
                         Fund is offering shares of four series, Vanguard
                         Balanced Index Fund is offering shares of one series
                         and Vanguard International Equity Index Fund is
                         offering shares of three series.
    
 
                                       50
<PAGE>   54
 
                         Vanguard Index Trust is a Pennsylvania business trust.
                         The Declaration of Trust permits the Trustees to issue
                         an unlimited number of shares of beneficial interest
                         with no par value. The Board of Trustees has the power
                         to designate one or more classes or series of shares of
                         common stock and to classify or reclassify any unissued
                         shares with respect to such series. Currently, the
                         Trust is offering shares of six series.
 
                         The Total International Portfolio is an independent
                         series of Vanguard STAR Fund, a Pennsylvania business
                         trust.
 
                         The shares of each series of the Funds are fully paid
                         and non-assessable; have no preference as to
                         conversion, exchange, dividends, retirement or other
                         features; and have no preemptive rights. Such shares
                         have non-cumulative voting rights, meaning that the
                         holders of more than 50% of the shares voting for the
                         election of Directors (Trustees) can elect 100% of the
                         Directors (Trustees) if they so choose.
 
                         Annual meetings of shareholders will not be held except
                         as required by the Investment Company Act of 1940 and
                         other applicable law. An annual meeting will be held to
                         vote on the removal of a Director (Trustee) or
                         Directors (Trustees) of a Fund if requested in writing
                         by the holders of not less than 10% of the outstanding
                         shares of such Fund.
 
                         All securities and cash for the Total Bond Market
                         Portfolio of Vanguard Bond Index Fund are held by
                         Morgan Guaranty Trust Company, New York, NY. All
                         securities and cash for the Short-Term Bond,
                         Intermediate-Term Bond and Long-Term Bond Portfolios
                         are held by State Street Bank and Trust Company ("State
                         Street Bank"), Boston, MA. All securities and cash for
                         Vanguard Balanced Index Fund and for Vanguard Total
                         International Portfolio are held by CoreStates Bank,
                         N.A. ("CoreStates"), Philadelphia, PA. All Securities
                         and cash for Vanguard International Equity Index Fund
                         are held by Morgan Stanley Trust Company. All
                         securities and cash for the 500, Extended Market, and
                         Total Stock Market Portfolios of Vanguard Index Trust
                         are held by State Street Bank and Trust Company. All
                         securities and cash for the Small Capitalization Stock
                         and the Value and Growth Portfolios are held by
                         CoreStates Bank.
 
                         The Vanguard Group, Inc., Valley Forge, PA, serves as
                         the Funds' Transfer and Dividend Disbursing Agent.
                         Price Waterhouse LLP, serves as independent accountants
                         for the Funds and will audit their financial statements
                         annually. The Funds are not involved in any litigation.
- --------------------------------------------------------------------------------
 
                                       51
<PAGE>   55
 
                               SHAREHOLDER GUIDE
 
   
OPENING AN
ACCOUNT AND
PURCHASING
SHARES                   You may open a regular (non-retirement) account, either
                         by mail or wire. Simply complete and return an Account
                         Registration Form and any required legal documentation,
                         indicating the Portfolio you have chosen and amount you
                         wish to invest. Your purchase must be equal to or
                         greater than the $3,000 minimum initial investment
                         requirement in any Portfolio ($1,000 for Uniform
                         Gifts/Transfers to Minors Act accounts). You must open
                         a new Individual Retirement Account by mail (IRAs may
                         not be opened by wire) using a Vanguard IRA Adoption
                         Agreement. Your purchase must be equal to or greater
                         than the $1,000 minimum initial investment requirement,
                         but no more than $2,000 if you are making a regular IRA
                         contribution. Rollover contributions are generally
                         limited to the amount withdrawn within the past 60 days
                         from an IRA or other qualified retirement plan. If you
                         need assis-
                         tance with the Account Registration Form or have any
                         questions about the Fund, please call our Investor
                         Information Department (1-800-662-7447). NOTE: For
                         other types of account registrations (e.g.,
                         corporations, associations, other organizations, trusts
                         or powers of attorney), please call us to determine
                         which additional forms you may need.
    
 
PURCHASE
RESTRICTIONS             Each Portfolio's shares are purchased at the
                         next-determined net asset value after your investment
                         has been received in the form of Federal Funds. See
                         "When Your Account Will Be Credited." The Fund is
                         offered on a no-load basis (i.e., there are no sales
                         commissions or 12b-1 fees).
 
                         1) Because of the risks associated with bond and stock
                            investments, each Portfolio is intended to be a
                            long-term investment vehicle and is not designed to
                            provide investors with a means of speculating on
                            short-term bond market movements. Consequently, the
                            Fund reserves the right to reject any specific
                            purchase (and exchange purchase) request. The Fund
                            also reserves the right to suspend the offering of
                            shares for a period of time.
 
   
                         2) Vanguard will not accept third-party checks to
                            purchase shares of the Fund. Please be sure your
                            purchase check is made payable to The Vanguard
                            Group.
    
 
                                       52
<PAGE>   56
 
IMPORTANT NOTE
ON EXPENSES              Transaction fees are charged by Portfolios as follows:
 
   
<TABLE>
<CAPTION>
                                                              FEES ON       FEES ON
                                                             PURCHASES    REDEMPTIONS
                                                             ---------    -----------
                        <S>                                  <C>          <C>
                        Vanguard Bond Index Fund............    None          None
                        Vanguard Balanced Fund..............    None          None
                        Vanguard Index Trust
                          500 Portfolio.....................    None          None
                          Extended Market Portfolio.........     0.5%         None
                          Small Capitalization Stock
                             Portfolio......................     0.5%         None
                          Value Portfolio...................    None          None
                          Growth Portfolio..................    None          None
                        Vanguard International Equity Index Fund
                          European Portfolio................       1%         None
                          Pacific Portfolio.................     0.5%         None
                          Emerging Markets Portfolio........     1.5%            1%
                        Vanguard Total International
                          Portfolio.........................    0.75%         None
</TABLE>
    
 
                         Additionally, each Portfolio of all of the Funds and
                         the Trust assesses a $10 annual account maintenance
                         fee. The $10 annual account maintenance fee will be
                         waived for shareholders with an account balance of
                         $10,000 or more. See "Portfolio Expenses" for more
                         information.
 
ADDITIONAL
INVESTMENTS              Subsequent investments may be made by mail ($100
                         minimum per Portfolio), wire ($1,000 minimum), written
                         exchange from another Vanguard Fund account ($100
                         minimum per Portfolio), or Vanguard Fund Express.
                         Subsequent investments to Individual Retirement
                         Accounts may be made by mail ($100 minimum) or exchange
                         from another Vanguard Fund account. In some instances,
                         contributions may be made by wire or Vanguard Fund
                         Express. Please call us for more information on these
                         options.
  ------------------------------------------------------------------------------
 
   
<TABLE>
<S>                       <C>                                 <C>
                                                              ADDITIONAL INVESTMENTS
                          NEW ACCOUNT                         TO EXISTING ACCOUNTS
PURCHASING BY MAIL        Please include the amount           Additional investments
                          of your initial investment          should include the
Complete and sign the     and the name of the                 Invest-by-Mail remittance
enclosed Account          Portfolios you have                 form attached to your Fund
Registration Form         selected on the registra-           confirmation statements.
                          tion form, make your check          Please make your check
                          payable to The Vanguard             payable to The Vanguard
                          Group (Portfolio Number),           Group (Portfolio Number),
                          see page 54 for the                 write your account number
                          appropriate number and              on your check, and using
                          mail to:                            the return envelope
                                                              provided, mail to the
                          VANGUARD FINANCIAL CENTER           address indicated on the
                          P.O. BOX 2600                       Invest-by-Mail Form. See
                          VALLEY FORGE, PA                    page 54 for the ap-
                          19482-2600                          propriate Portfolio
                                                              number.
</TABLE>
    
 
                                       53
<PAGE>   57
 
   
<TABLE>
<S>                       <C>                                 <C>
For express or            VANGUARD FINANCIAL CENTER           All written requests
registered mail,          455 DEVON PARK DRIVE                should be mailed to one of
send to:                  WAYNE, PA 19087-1815                the addresses indicated
                                                              for new accounts. Do not
                                                              send registered or ex-
                                                              press mail to the post
                                                              office box address.
                          PORTFOLIO NUMBERS
                          --------------------------
                          VANGUARD BOND                       VANGUARD INDEX TRUST
                          INDEX FUND                          500 Portfolio -- 40
                          Total Bond Market                   Extended Market
                          Portfolio -- 84                     Portfolio -- 98
                          Short-Term Bond                     Total Stock Market
                          Portfolio -- 132                    Portfolio -- 85
                          Intermediate-Term Bond              Small Capitalization Stock
                          Portfolio -- 314                    Portfolio -- 48
                          Long-Term Bond                      Value Portfolio -- 06
                          Portfolio -- 522                    Growth Portfolio -- 09
                          VANGUARD BALANCED                   VANGUARD INTERNATIONAL
                          INDEX FUND -- 02                    EQUITY INDEX FUND
                          VANGUARD TOTAL                      European Portfolio -- 79
                          INTERNATIONAL                       Pacific Portfolio -- 72
                          PORTFOLIO -- 113                    Emerging Markets
                                                              Portfolio -- 533
                          --------------------------------------------------------------
PURCHASING BY WIRE                          CORESTATES BANK, N.A.
                                            ABA 031000011
Money should be                             CORESTATES ACCT NO 0101 9897
wired to:                                   ATTN VANGUARD
                                            NAME OF FUND OR TRUST
BEFORE WIRING                               NAME OF PORTFOLIO
                                            ACCOUNT NUMBER
Please contact                              ACCOUNT REGISTRATION
Client Services
(1-800-662-2739)          To assure proper receipt, please be sure your bank includes
                          the name of the Portfolio, the account number Vanguard has
                          assigned to you and the eight digit CoreStates number. If you
                          are opening a new account, please complete the Account
                          Registration Form and mail it to the "New Account" address
                          above after completing your wire arrangement. NOTE: Federal
                          Funds wire purchase orders will be accepted only when the Fund
                          and Custodian Bank are open for business.
</TABLE>
    
 
  ------------------------------------------------------------------------------
 
PURCHASING BY
EXCHANGE (from a
Vanguard account)        You may open an account or purchase additional shares
                         by making an exchange from an existing Vanguard Fund
                         account. However, the Funds reserve the right to refuse
                         any exchange purchase request. Call our Client Services
                         Department (1-800-662-2739) for assistance. The new
                         account will have the same registration as the existing
                         account.
 
                                       54
<PAGE>   58
 
                         Telephone exchanges are not accepted for the Portfolios
                         of Vanguard Balanced Index Fund, Vanguard Index Trust,
                         and Vanguard International Equity Index Fund. You may,
                         however, open an account by exchange by providing the
                         appropriate information on the Account Registration
                         Form.
  ------------------------------------------------------------------------------
 
   
PURCHASING BY
FUND EXPRESS
Automatic Investment
and Special Purchase     The Fund Express Automatic Investment option lets you
                         move money from your bank account to your Vanguard
                         account on the schedule (monthly, bimonthly [every
                         other month], quarterly, semiannually, or annually) you
                         select. Additionally, the Fund Express Special Purchase
                         option which is only available for Portfolios of the
                         Vanguard Bond Index Fund lets you move money from your
                         bank account to your Vanguard account on an "as needed"
                         basis. To establish this option, please provide the
                         appropriate information on the Account Registration
                         Form. We will send you a confirmation of your Fund
                         Express enrollment; please wait two weeks before using
                         the service.
    
- --------------------------------------------------------------------------------
 
CHOOSING A
DISTRIBUTION
OPTION                   You must select one of three distribution options:
 
                         1. AUTOMATIC REINVESTMENT OPTION -- Both dividends and
                            capital gains distributions will be reinvested in
                            additional Fund shares. This option will be selected
                            for you automatically unless you specify one of the
                            other options.
 
                         2. CASH DIVIDEND OPTION -- Your dividends will be paid
                            in cash and your capital gains will be reinvested in
                            additional Fund shares.
 
                         3. ALL CASH OPTION -- Both dividend and capital gains
                            distributions will be paid in cash.
 
                         You may change your option by calling our Client
                         Services Department (1-800-662-2739).
 
                         In addition, an option to invest your cash dividends
                         and/or capital gains distributions in another Vanguard
                         Fund account is available. Please call our Client
                         Services Department (1-800-662-2739) for information.
                         You may also elect Vanguard Dividend Express which
                         allows you to transfer your cash dividends and/or
                         capital gains distributions automatically to your bank
                         account. Please see "Other Vanguard Services" for more
                         information.
- --------------------------------------------------------------------------------
 
TAX CAUTION
INVESTORS SHOULD ASK
ABOUT THE TIMING OF
CAPITAL GAINS AND
DIVIDEND DISTRIBUTIONS
BEFORE INVESTING         Under Federal tax laws, the Fund is required to
                         distribute net capital gains and dividend income to
                         Fund shareholders. These distributions are made to all
                         shareholders who own Fund shares as of the
                         distribution's record date, regardless of how long the
                         shares have been owned. Purchasing shares just prior to
                         the record date could have a significant impact on your
                         tax liability for the year. For example, if you
                         purchase shares immediately prior to the record date of
                         a sizable capital gain distribution, you will be
                         assessed taxes on the amount of the capital gain
                         distribution later paid even though you owned the Fund
                         shares for just a short period of time. (Taxes are due
                         on the distributions even if the dividend or gain is
                         reinvested in additional Fund shares.) While the total
                         value of your investment will be the same after the
                         capital gain distribution -- the amount of the capital
                         gain distribution will offset
 
                                       55
<PAGE>   59
 
                         the drop in the net asset value of the shares -- you
                         should be aware of the tax implications the timing of
                         your purchase may have.
 
   
                         Prospective investors should, therefore, inquire about
                         potential distributions before investing. Each Fund's
                         annual capital gains distributions normally occurs in
                         December. Income dividends are generally paid on the
                         first day of each month for the four Portfolios of
                         Vanguard Bond Index Fund, annually in December for the
                         three Portfolios of Vanguard International Equity Index
                         Fund and Vanguard Total International Portfolio, and
                         the Extended Market and Small Capitalization Stock
                         Portfolio of Vanguard Index Trust, and quarterly in
                         March, June, September and December for Vanguard
                         Balanced Index Fund, and the 500, Total Stock Market,
                         and the Value and Growth Portfolios of Vanguard Index
                         Trust. In addition, the Portfolios may occasionally be
                         required to make supplemental dividend or capital gains
                         distributions at some other time of year. For
                         additional information on distributions and taxes, see
                         the section titled "Dividends, Capital Gains, and
                         Taxes."
    
- --------------------------------------------------------------------------------
 
IMPORTANT
INFORMATION
ESTABLISHING OPTIONAL
SERVICES                 The easiest way to establish optional Vanguard services
                         on your account is to select the options you desire
                         when you complete your Account Registration Form. IF
                         YOU WISH TO ADD OPTIONS LATER, YOU MAY NEED TO PROVIDE
                         VANGUARD WITH ADDITIONAL INFORMATION AND A SIGNATURE
                         GUARANTEE. PLEASE CALL OUR CLIENT SERVICES DEPARTMENT
                         (1-800-662-2739) FOR FURTHER ASSISTANCE.
 
SIGNATURE
GUARANTEES               For our mutual protection, we may require a signature
                         guarantee on certain written transaction requests. A
                         signature guarantee verifies the authenticity of your
                         signature and may be obtained from banks, brokers and
                         any other guarantor that Vanguard deems acceptable. A
                         SIGNATURE GUARANTEE CANNOT BE PROVIDED BY A NOTARY
                         PUBLIC.
 
   
CERTIFICATES             Share certificates will be issued upon request for
                         Portfolios of Vanguard Bond Index Fund, Vanguard Index
                         Trust, and the European and Pacific Portfolios of
                         Vanguard International Equity Index Fund. If a
                         certificate is lost, you may incur an expense to
                         replace it. Share certificates will not be available
                         for Vanguard Balanced Index Fund, the Total
                         International Portfolio of Vanguard STAR Fund and the
                         Emerging Markets Portfolio of Vanguard International
                         Equity Index Fund.
    
 
BROKER-DEALER
PURCHASES                If you purchase shares in Vanguard Funds through a
                         registered broker-dealer or investment adviser, the
                         broker-dealer or adviser may charge a service fee.
 
CANCELLING
TRADES                   The Fund will not cancel any trade (e.g., a purchase,
                         exchange or redemption) believed to be authentic,
                         received in writing or by telephone, once the trade
                         request has been received.
 
   
ELECTRONIC
PROSPECTUS
DELIVERY                 You may receive a prospectus for the Fund or any of the
                         Vanguard Funds in an electronic format. Please call
                         1-800-231-7870 for additional information or see "Other
                         Vanguard Services -- Computer Access." You may also
                         receive a paper copy of the prospectus, by calling
                         1-800-662-7447.
    
- --------------------------------------------------------------------------------
 
                                       56
<PAGE>   60
 
WHEN YOUR
ACCOUNT WILL
BE CREDITED              The trade date is the date on which your account is
                         credited.
 
                         For the Vanguard Bond Index Fund, the trade date is
                         generally the day on which the Fund receives your
                         investment in the form of Federal Funds (monies
                         credited to the Fund's Custodian Bank by a Federal
                         Reserve Bank). Your trade date varies according to your
                         method of payment for your shares.
 
   
                         Purchases of Fund shares by check will receive a trade
                         date the day the funds are received in good order by
                         Vanguard. Thus, if your purchase by check is received
                         by the close of regular trading on the New York Stock
                         Exchange (generally 4:00 p.m. Eastern time), your trade
                         date is the business day your check is received in good
                         order. If your purchase is received after the close of
                         the Exchange, your trade date is the business day
                         following receipt of your check.
    
 
                         For purchases by Federal Funds wire or exchange, the
                         Fund is credited immediately with Federal Funds. Thus,
                         if your purchase by Federal Funds wire or exchange is
                         received by the close of the Exchange, your trade date
                         is the day of receipt. If your purchase is received
                         after the close of the Exchange, your trade date is the
                         business day following receipt of your wire or
                         exchange.
 
   
                         For Vanguard Balanced Fund, Vanguard Index Trust and
                         Vanguard International Equity Index Fund, if your
                         purchase is made by check, Federal Funds wire or
                         exchange, and is received by the close of regular
                         trading on the New York Stock Exchange (generally 4:00
                         p.m. Eastern time), your trade date is the day of
                         receipt. If your purchase is received after the close
                         of the Exchange, your trade date is the next business
                         day. Shares of the Funds are purchased at the net asset
                         value determined on your trade date. Shares of Vanguard
                         Index Trust -- Extended Market and Small Capitalization
                         Stock Portfolios, and Vanguard International Equity
                         Index Fund -- Pacific Portfolio are subject to a 0.5%
                         transaction fee on purchases. Shares of Vanguard
                         International Equity Index Fund -- European Portfolio
                         are subject to a 1% transaction fee on purchases.
                         Shares of Vanguard International Equity Index
                         Fund -- Emerging Markets Portfolio are subject to a
                         1.5% transaction fee on purchases. Shares of the Total
                         International Portfolio are subject to a 0.75%
                         transaction fee on purchases. See "Fund Expenses" for
                         additional information.
    
 
                         In order to prevent lengthy processing delays caused by
                         the clearing of foreign checks, Vanguard will only
                         accept a foreign check which has been drawn in U.S.
                         dollars and has been issued by a foreign bank with a
                         U.S. correspondent bank. The name of the U.S.
                         correspondent bank must be printed on the face of the
                         foreign check.
 
                         Your shares are purchased at the next-determined net
                         asset value after your investment has been received in
                         the form of Federal Funds. You will begin to earn
                         dividends on the calendar day following the trade date.
                         (For a Friday trade date, you will begin earning
                         dividends on Saturday.)
- --------------------------------------------------------------------------------
 
                                       57
<PAGE>   61
 
SELLING YOUR
SHARES                   You may withdraw any portion of the funds in your
                         account by redeeming shares at any time. You generally
                         may initiate a request by writing or by telephoning.
                         Your redemption proceeds are normally mailed, credited
                         or wired -- depending upon the method of withdrawal you
                         have PREVIOUSLY chosen -- within two business days
                         after the receipt of the request in Good Order.
  ------------------------------------------------------------------------------
 
SELLING BY WRITING
A CHECK                  Redemption by check is only available to shareholders
                         of Vanguard Bond Index Fund. You may withdraw funds
                         from your Vanguard Bond Index account by writing a
                         check payable in the amount of $250 or more. When a
                         check is presented for payment to the Fund's agent,
                         CoreStates Bank, the Fund will redeem sufficient shares
                         in your account at the next-determined net asset value
                         to cover the amount of the check.
 
                         In order to establish the checkwriting option on your
                         account, all registered shareholders must sign a
                         signature card. After your completed signature card is
                         received by the Fund, an initial supply of checks will
                         be mailed within 10 business days. There is no charge
                         for checks or for their clearance. CORPORATIONS, TRUSTS
                         AND OTHER ORGANIZATIONS SHOULD CALL OR WRITE OUR CLIENT
                         SERVICES DEPARTMENT (1-800-662-2739) BEFORE SUBMITTING
                         SIGNATURE CARDS, AS ADDITIONAL DOCUMENTS MAY BE
                         REQUIRED TO ESTABLISH THE CHECKWRITING SERVICE.
 
                         Before establishing the checkwriting option, you should
                         be aware that:
 
                         1. Writing a check (a redemption of shares) is a
                            taxable event.
                         2. The Fund does not allow an account to be closed
                            through the checkwriting option.
                         3. Vanguard cannot guarantee a stop payment on any
                            check. If you wish to reverse a stop payment order,
                            you must do so in writing.
                         4. Shares held in certificate form cannot be redeemed
                            using the checkwriting option.
                         5. The Fund reserves the right to terminate or alter
                            this service at any time.
  ------------------------------------------------------------------------------
 
SELLING BY MAIL          Requests should be mailed to VANGUARD FINANCIAL CENTER,
                         VANGUARD INDEX FUNDS, P.O. BOX 1120, VALLEY FORGE, PA
                         19482. (For express or registered mail, send your
                         request to Vanguard Financial Center, Vanguard Index
                         Funds, 455 Devon Park Drive, Wayne, PA 19087.)
 
                         The redemption price of shares will be the Portfolio's
                         net asset value next determined after Vanguard has
                         received all required documents in Good Order.
  ------------------------------------------------------------------------------
 
DEFINITION OF
GOOD ORDER               GOOD ORDER means that the request includes the
                         following:
 
                         1. The account number and Portfolio name.
                         2. The amount of the transaction (specified in dollars
                            or shares).
                         3. The signatures of all owners EXACTLY as they are
                            registered on the account.
                         4. Any required signature guarantees.
                         5. Other supporting legal documentation that might be
                            required, in the case of estates, corporations,
                            trusts, and certain other accounts.
 
                                       58
<PAGE>   62
 
                         6. Any certificates you are holding for the account.
 
   
                         IF YOU HAVE QUESTIONS ABOUT THIS DEFINITION AS IT
                         PERTAINS TO YOUR REQUEST, PLEASE CALL OUR CLIENT
                         SERVICES DEPARTMENT (1-800-662-2739).
    
  ------------------------------------------------------------------------------
 
SELLING BY
TELEPHONE                To sell shares by telephone, you or your pre-authorized
                         representative may call our Client Services Department
                         at 1-800-662-2739. For telephone redemptions, you may
                         have the proceeds sent to you either by mail or by
                         wire. In addition to the details below, please see
                         "Important Information About Telephone Transactions."
 
   
                         BY MAIL: Telephone mail redemption is automatically
                         established on your account unless you indicate
                         otherwise on your Account Registration Form. You may
                         redeem any amount by calling Vanguard. The proceeds
                         will be paid to the registered shareholders and mailed
                         to the address of record. PLEASE NOTE: As a protection
                         against fraud, your telephone mail redemption privilege
                         will be suspended for 15 calendar days following any
                         expedited address change to your account. An expedited
                         address change is one that is made by telephone, or, in
                         writing, without the signatures of all account owners.
    
 
                         BY WIRE: Telephone wire redemption must be specifically
                         elected for your account. The best time to elect
                         telephone wire redemption is at the time you complete
                         your Account Registration Form. If you do not presently
                         have telephone wire redemption and wish to establish
                         it, please contact Client Services.
 
                         With the wire redemption option, you may withdraw a
                         minimum of $1,000 and have the amount wired directly to
                         your bank account. Wire redemptions less than $5,000
                         are subject to a $5 charge deducted by Vanguard. There
                         is no Vanguard charge for wire redemptions of $5,000 or
                         more. However, your bank may assess a separate fee to
                         accept incoming wires.
 
                         A request to change the bank associated with your wire
                         redemption option must be received in writing, signed
                         by each registered shareholder, and accompanied by a
                         voided check or preprinted deposit slip. A signature
                         guarantee is required if your bank registration is not
                         identical to your Vanguard Fund account registration.
  ------------------------------------------------------------------------------
 
   
SELLING BY FUND
EXPRESS
Automatic Withdrawal
& Special Redemption     If you select the Fund Express Automatic Withdrawal
                         option, money will be automatically moved from your
                         Vanguard Fund account to your bank account according to
                         the schedule you have selected. The Special Redemption
                         option (only available to Vanguard Bond Index Fund
                         Shareholders) lets you move money from your Vanguard
                         account to your bank account on an "as needed" basis.
                         To establish these Fund Express options, please provide
                         the appropriate information on the Account Registration
                         Form. We will send you a confirmation of your Fund
                         Express service; please wait two weeks before using the
                         service.
    
  ------------------------------------------------------------------------------
 
SELLING BY
EXCHANGE                 You may sell shares of the Portfolio by making an
                         exchange into another Vanguard Fund account. Exchanges
                         to and from Vanguard Balanced Fund, Vanguard Index
                         Trust and Vanguard International Equity Index Fund may
 
                                       59
<PAGE>   63
 
                         be made only by mail. Send your exchange request to
                         Vanguard Financial Center, Vanguard (insert Fund name),
                         P.O. Box 1120, Valley Forge, PA 19482. Please see
                         "Exchanging Your Shares" for details.
  ------------------------------------------------------------------------------
 
IMPORTANT REDEMPTION
INFORMATION              Shares purchased by check or Fund Express may be
                         redeemed at any time. However, your redemption proceeds
                         will not be paid until payment for the purchase is
                         collected, which may take up to ten calendar days.
  ------------------------------------------------------------------------------
 
DELIVERY OF
REDEMPTION
PROCEEDS                 Redemption requests received by telephone prior to the
                         close of the New York Stock Exchange (generally 4:00
                         p.m. Eastern time), are processed on the day of receipt
                         and the redemption proceeds are normally sent on the
                         following business day.
 
                         Redemption requests received by telephone after the
                         close of the Exchange are processed on the business day
                         following receipt and the proceeds are normally sent on
                         the second business day following receipt.
 
                         Redemption proceeds must be sent to you within seven
                         days of receipt of your request in Good Order except as
                         described above in "Important Redemption Information."
 
                         If you experience difficulty in making a telephone
                         redemption during periods of drastic economic or market
                         changes, your redemption request may be made by regular
                         or express mail. It will be implemented at the net
                         asset value next determined after your request has been
                         received by Vanguard in Good Order. The Fund reserves
                         the right to revise or terminate the telephone
                         redemption privilege at any time.
 
                         The Fund may suspend the redemption right or postpone
                         payment at times when the New York Stock Exchange is
                         closed or under any emergency circumstances as
                         determined by the United States Securities and Exchange
                         Commission.
 
   
                         If the Board of Directors (Trustees) determines that it
                         would be detrimental to the best interests of the
                         Fund's remaining shareholders to make payment in cash,
                         the Fund may pay redemption proceeds in whole or in
                         part by a distribution in kind of readily marketable
                         securities.
    
  ------------------------------------------------------------------------------
 
VANGUARD'S AVERAGE
COST STATEMENT           If you make a redemption from a qualifying account,
                         Vanguard will send you an Average Cost Statement which
                         provides you with the tax basis of the shares you
                         redeemed. Please see "Statements and Reports" for
                         additional information.
  ------------------------------------------------------------------------------
 
LOW BALANCE FEE AND
MINIMUM ACCOUNT
BALANCE REQUIREMENT      Due to the relatively high cost of maintaining smaller
                         accounts, each Fund will automatically deduct a $10
                         annual fee from non-retirement accounts with balances
                         falling below $2,500 ($500 for Uniform Gifts/ Transfers
                         to Minors Act accounts). This fee deduction will occur
                         mid-year, beginning in 1996. The fee generally will be
                         waived for investors whose aggregate Vanguard assets
                         exceed $50,000.
 
                         In addition, each Fund reserves the right to liquidate
                         any non-retirement account that is below the minimum
                         initial investment amount of $3,000. If at any time the
                         total investment does not have a value of at least
                         $3,000, you may be notified that your account is below
                         the Fund's
 
                                       60
<PAGE>   64
 
                         minimum account balance requirement. You would then be
                         allowed 60 days to make an additional investment before
                         the account is liquidated. Proceeds would be promptly
                         paid to the registered shareholder.
 
                         Vanguard will not liquidate your account if it has
                         fallen below $3,000 solely as a result of declining
                         markets (i.e., a decline in a Portfolio's net asset
                         value).
- --------------------------------------------------------------------------------
 
EXCHANGING
YOUR SHARES
EXCHANGING BY
TELEPHONE
Call Client Services
(1-800-662-2739)         Should your investment goals change, you may exchange
                         your shares for those of other available Vanguard
                         Funds.
 
   
                         Vanguard Bond Index Fund is the only Vanguard Index
                         Fund that allows telephone exchanges. When exchanging
                         shares by telephone, please have ready the Portfolio
                         name, account number, Social Security Number or
                         employer identification number listed on the account,
                         and exact name and address in which the account is
                         registered. Only the registered shareholder may
                         complete such an exchange. Requests for telephone
                         exchanges received prior to the close of the New York
                         Stock Exchange (generally 4:00 p.m. Eastern time) are
                         processed at the close of business that same day.
                         Requests received after the close of the Exchange are
                         processed the next business day. TELEPHONE EXCHANGES
                         ARE NOT ACCEPTED INTO OR FROM NON-RETIREMENT
                         INVESTMENTS IN VANGUARD BALANCED INDEX FUND, VANGUARD
                         INDEX TRUST, VANGUARD REIT INDEX PORTFOLIO, VANGUARD
                         INTERNATIONAL EQUITY INDEX FUND, VANGUARD TOTAL
                         INTERNATIONAL PORTFOLIO, AND VANGUARD QUANTITATIVE
                         PORTFOLIOS. If you experience difficulty in making a
                         telephone exchange, your exchange request may be made
                         by regular or express mail, and it will be implemented
                         at the closing net asset value on the date received by
                         Vanguard provided the request is received in Good
                         Order.
    
 
                         Neither the Funds nor Vanguard is responsible for the
                         authenticity of exchange instructions received by
                         telephone. Investors bear the full risk of any loss
                         arising from unauthorized telephone exchanges. To
                         prohibit telephone exchanges on your account, please
                         notify the Fund in writing. Otherwise, the telephone
                         exchange privilege will be automatically established
                         for your account.
  ------------------------------------------------------------------------------
 
EXCHANGING BY MAIL       Please be sure to include on your exchange request the
                         name and account number of your current Portfolio, the
                         name of the Fund you wish to exchange into, the amount
                         you wish to exchange, and the signatures of all
                         registered account holders. Send your request to
                         VANGUARD FINANCIAL CENTER, VANGUARD INDEX FUNDS, P.O.
                         BOX 1120, VALLEY FORGE, PA 19482. (For express or
                         registered mail, send your request to Vanguard
                         Financial Center, Vanguard Index Funds, 455 Devon Park
                         Drive, Wayne, PA 19087.)
  ------------------------------------------------------------------------------
 
   
EXCHANGING
ON-LINE                  You may use your personal computer to exchange shares
                         of most Vanguard funds by accessing Vanguard's website
                         (http://
                         www.vanguard.com). To establish this service on your
                         account, you must first register through our website.
                         We will then send to you by mail, an account access
                         password that will enable you to make on-line
                         exchanges.
    
 
                                       61
<PAGE>   65
 
   
                         The Vanguard funds that you cannot purchase or sell
                         through on-line exchange are VANGUARD INDEX TRUST,
                         VANGUARD BALANCED INDEX FUND, VANGUARD INTERNATIONAL
                         EQUITY INDEX FUND, VANGUARD REIT INDEX PORTFOLIO,
                         VANGUARD TOTAL INTERNATIONAL PORTFOLIO, and VANGUARD
                         GROWTH AND INCOME PORTFOLIO (formerly known as Vanguard
                         Quantitative Portfolios). These funds do permit on-line
                         exchanges within IRAs and other retirement accounts.
    
  ------------------------------------------------------------------------------
 
IMPORTANT EXCHANGE
INFORMATION              Before you make an exchange, you should consider the
                         following:
 
                         - Please read the Fund's prospectus before making an
                           exchange. For a copy and for answers to any questions
                           you may have, call our Investor Information
                           Department (1-800-662-7447).
 
                         - An exchange is treated as a redemption and a
                           purchase. Therefore, you could realize a taxable gain
                           or loss on the transaction.
 
   
                         - Exchanges are accepted only if the registrations and
                           the taxpayer identification numbers of the two
                           accounts are identical.
    
 
   
                         - New accounts are not currently accepted in
                           Vanguard/Windsor Fund.
    
 
                         - The redemption price of shares redeemed by exchange
                           is the net asset value next determined after Vanguard
                           has received all required documentation in Good
                           Order.
 
                         - When opening a new account by exchange, you must meet
                           the minimum investment requirement of the new Fund.
 
                         Every effort will be made to maintain the exchange
                         privilege. However, the Fund reserves the right to
                         revise or terminate its provisions, limit the amount of
                         or reject any exchange, as deemed necessary, at any
                         time.
 
                         The exchange privilege is only available in states in
                         which the shares of the Funds are registered for sale.
                         The Funds shares are currently registered for sale in
                         all 50 states and each Fund intends to maintain such
                         registration.
- --------------------------------------------------------------------------------
 
EXCHANGE
PRIVILEGE
LIMITATIONS              The Fund's exchange privilege is not intended to afford
                         shareholders a way to speculate on short-term movements
                         in the market. Accordingly, in order to prevent
                         excessive use of the exchange privilege that may
                         potentially disrupt the management of the Fund and
                         increase transaction costs, the Fund has established a
                         policy of limiting excessive exchange activity.
 
                         Exchange activity generally will not be deemed
                         excessive if limited to TWO SUBSTANTIVE EXCHANGE
                         REDEMPTIONS (AT LEAST 30 DAYS APART) from a Portfolio
                         of the Fund during any twelve month period.
                         Notwithstanding these limitations, the Fund reserves
                         the right to reject any purchase request (including
                         exchange purchases from other Vanguard portfolios) that
                         is reasonably deemed to be disruptive to efficient
                         portfolio management.
   
- --------------------------------------------------------------------------------
    
 
                                       62
<PAGE>   66
 
IMPORTANT
INFORMATION
ABOUT TELEPHONE
TRANSACTIONS             The ability to initiate redemptions (except wire
                         redemptions) and exchanges by telephone is
                         automatically established on your account unless you
                         request in writing that telephone transactions on your
                         account not be permitted. The ability to initiate wire
                         redemptions by telephone will be established on your
                         account only if you specifically elect this option in
                         writing.
 
                         To protect your account from losses resulting from
                         unauthorized or fraudulent telephone instructions,
                         Vanguard adheres to the following security procedures:
 
   
                         1. SECURITY CHECK.  To request a transaction by
                            telephone, the caller must know (i) the name of the
                            Portfolio; (ii) the 10-digit account number; (iii)
                            the exact name and address used in the registration;
                            and (iv) the Social Security or employer
                            identification number listed on the account.
    
 
                         2. PAYMENT POLICY.  The proceeds of any telephone
                            redemption by mail will be made payable to the
                            registered shareowner and mailed to the address of
                            record, only. In the case of a telephone redemption
                            by wire, the wire transfer will be made only in
                            accordance with the shareowner's prior written
                            instructions.
 
   
                         Neither the Fund nor Vanguard will be responsible for
                         the authenticity of transaction instructions received
                         by telephone, provided that reasonable security
                         procedures have been followed. Vanguard believes that
                         the security procedures described above are reasonable,
                         and that if such procedures are followed, you will bear
                         the risk of any losses resulting from unauthorized or
                         fraudulent telephone transactions on your account.
    
- --------------------------------------------------------------------------------
 
TRANSFERRING
REGISTRATION             You may transfer the registration of any of your Fund
                         shares to another person by completing a transfer form
                         and sending it to: VANGUARD FINANCIAL CENTER, P.O. BOX
                         1110, VALLEY FORGE, PA 19482, ATTENTION: TRANSFER
                         DEPARTMENT. The request must be in Good Order. To
                         obtain a transfer form, please call our Client Services
                         Department (1-800-662-2739).
- --------------------------------------------------------------------------------
 
STATEMENTS AND
REPORTS                  Vanguard will send you a confirmation statement each
                         time you initiate a transaction in your account. You
                         will also receive a comprehensive account statement at
                         the end of each calendar quarter. The fourth-quarter
                         statement will be a year-end statement, listing all
                         transaction activity for the entire calendar year.
 
   
                         Vanguard's Average Cost Statement provides you with the
                         average cost of shares redeemed from your account
                         during the calendar year, using the average cost single
                         category method. This service is available for most
                         taxable accounts opened since January 1, 1986. In
                         general, investors who redeemed shares from a
                         qualifying Vanguard account may expect to receive their
                         Average Cost Statement along with their Portfolio
                         Summary Statement. Please call our Client Services
                         Department (1-800-662-2739) for information.
    
 
                                       63
<PAGE>   67
 
                         Financial reports on the Fund will be mailed to you
                         semi-annually, according to the Fund's fiscal year-end.
- --------------------------------------------------------------------------------
 
OTHER VANGUARD
SERVICES                 For more information about any of these services,
                         please call our Investor Information Department at
                         1-800-662-7447.
 
VANGUARD DIRECT
DEPOSIT SERVICE          With Vanguard's Direct Deposit Service, most U.S.
                         Government checks (including Social Security and
                         military pension checks) and private payroll checks may
                         be automatically deposited into your Vanguard Fund
                         account. Separate brochures and forms are available for
                         direct deposit of U.S. Government and private payroll
                         checks.
 
VANGUARD AUTOMATIC
EXCHANGE SERVICE         Vanguard's Automatic Exchange Service allows you to
                         move money automatically among your Vanguard Fund
                         accounts. For instance, the service can be used to
                         "dollar cost average" from a money market portfolio
                         into a stock or bond fund or to contribute to an IRA or
                         other retirement plan. Please contact our Client
                         Services Department at 1-800-662-2739 for additional
                         information.
 
VANGUARD FUND
EXPRESS                  Vanguard's Fund Express allows you to transfer money
                         between your Fund account and your account at a bank,
                         savings and loan association, or a credit union that is
                         a member of the Automated Clearing House (ACH) system.
                         You may elect this service on the Account Registration
                         Form or call our Investor Information Department
                         (1-800-662-7447) for a Fund Express application.
 
                         Special rules govern how your Fund Express purchases or
                         redemptions are credited to your account. In addition,
                         some services of Fund Express cannot be used with
                         specific Vanguard Funds. For more information, please
                         refer to the Vanguard Fund Express brochure.
 
VANGUARD DIVIDEND
EXPRESS                  Vanguard's Dividend Express allows you to transfer your
                         dividends and/or capital gains distributions
                         automatically from your Fund account, one business day
                         after the Fund's payable date, to your account at a
                         bank, savings and loan association, or a credit union
                         that is a member of the Automated Clearing House (ACH)
                         system. You may elect this service on the Account
                         Registration Form or call our Investor Information
                         Department (1-800-662-7447) for a Vanguard Dividend
                         Express application.
 
   
VANGUARD
TELE-ACCOUNT             Vanguard Tele-Account is a convenient, automated
                         service that provides share price, price change and
                         yield quotations on Vanguard Funds through any
                         TouchToneTM telephone. This service also lets you
                         obtain information about your account balance, your
                         last transaction, and your most recent dividend or
                         capital gains payment. In addition, you may perform
                         investment exchanges of Vanguard Fund shares and
                         redemption by check using Tele-Account. To contact
                         Vanguard's Tele-Account service, dial 1-800-ON-BOARD
                         (1-800-662-6273). A brochure offering detailed
                         operating instructions is available from our Investor
                         Information Department (1-800-662-7447).
    
 
   
COMPUTER ACCESS
VANGUARD ON THE
WORLD WIDE WEB
KEYWORD: VANGUARD        Vanguard sponsors an education-oriented website
                         offering news and information about Vanguard Funds and
                         services, as well as interactive, easy-to-use
                         investment planning tools.
    
- --------------------------------------------------------------------------------
 
                                       64
<PAGE>   68
 
                     [THIS PAGE INTENTIONALLY LEFT BLANK.]
<PAGE>   69
 
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<PAGE>   70
 
<TABLE>
<S>              <C>                                    <C>
                 ---------------------------
                 THE VANGUARD GROUP
                 OF INVESTMENT
                 COMPANIES
                 Vanguard Financial Center
                 P.O. Box 2600
                 Valley Forge, PA 19482
                 INVESTOR INFORMATION
                 DEPARTMENT:
                 1-800-662-7447 (SHIP)
                 CLIENT SERVICES
                 DEPARTMENT:
                 1-800-662-2739 (CREW)
                 TELE-ACCOUNT FOR
                 24-HOUR ACCESS:
                 1-800-662-6273 (ON-BOARD)
                 TELECOMMUNICATION SERVICE
                 FOR THE HEARING-IMPAIRED:
                 1-800-662-2738
                 TRANSFER AGENT:
                 The Vanguard Group, Inc.
                 Vanguard Financial Center
                 Valley Forge, PA 19482
 
     P009
</TABLE>


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