VANGUARD INDEX TRUST
497, 1996-07-02
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                                                                     [FLAG LOGO]
                          P  R  O  S  P  E  C  T  U  S
                                  JULY 1, 1996
 
                          
                            VANGUARD BOND INDEX FUND

                          VANGUARD BALANCED INDEX FUND

                              VANGUARD INDEX TRUST

                    VANGUARD INTERNATIONAL EQUITY INDEX FUND

                     VANGUARD TOTAL INTERNATIONAL PORTFOLIO



                             [VANGUARD GROUP LOGO]

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PROSPECTUS -- JULY 1, 1996                         Members of The Vanguard Group
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NEW ACCOUNT INFORMATION: INVESTOR INFORMATION DEPARTMENT -- 1-800-662-7447
(SHIP)
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SHAREHOLDER ACCOUNT SERVICES: CLIENT SERVICES DEPARTMENT -- 1-800-662-2739
(CREW)
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INVESTMENT
OBJECTIVES AND
POLICIES          The Vanguard index funds offered in this prospectus are four
                  separate, individual open-end diversified investment
                  companies. The funds 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.
                  Each of the Portfolios invests in securities (bonds or common
                  stocks) in order to match the investment performance of a
                  distinct market index.
    
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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 is $3,000 for each Portfolio or $1,000 for Uniform
                  Gifts/Transfers to Minors Act accounts. Each of the Funds
                  assesses a $10 annual account maintenance fee. A portfolio
                  transaction fee of 1% is deducted from purchases of the Small
                  Capitalization Stock Portfolio of Vanguard Index Trust and a
                  0.5% portfolio transaction fee is deducted from purchases of
                  its Extended Market Portfolio. The European and Pacific
                  Portfolios of Vanguard International Equity Index Fund and the
                  Total International Portfolio assess a 1% portfolio
                  transaction fee on purchases and its Emerging Markets
                  Portfolio assesses a 2% portfolio transaction fee on purchases
                  and a 1% portfolio transaction fee on 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."
    
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ABOUT THIS
PROSPECTUS        This Prospectus is designed to set forth concisely the
                  information you should know about the Funds 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 Funds or by
                  calling our Investor Information Department.
    
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TABLE OF CONTENTS
 
<TABLE>
<S>                            <C>       <C>                            <C>       <C>                            <C>
Highlights...................    2       Implementation of Policies...   32               SHAREHOLDER GUIDE
Fund Expenses................    5       Investment Limitations.......   44       Opening an Account and
Financial Highlights.........    8       Management of the Funds......   45         Purchasing Shares..........     51
Yield and Total Return.......   14       Investment Advisers..........   45       When Your Account Will
        FUND INFORMATION                 Dividends, Capital Gains                   Be Credited................     56
Investment Objectives........   15         and Taxes................     46       Selling Your Shares..........     57
Investment Policies..........   17       The Share Price of                       Exchanging Your Shares.......     60
Investment Risks.............   24         Each Portfolio..............  49       Important Information About
Who Should Invest............   29       General Information..........   49         Telephone Transactions.....     62
                                                                                  Transferring Registration....     62
</TABLE>
 
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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.
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<PAGE>   3
 
                                   HIGHLIGHTS
 
                        Vanguard offers four index funds consisting of a total
                        of fifteen separate portfolios. Unlike other mutual
                        funds which generally attempt to "beat" market averages
                        with often unpredictable results, Vanguard's index funds
                        seek to "match" the performance of their underlying
                        indexes and thus are expected to provide a highly
                        predictable return relative to their benchmarks. The
                        Funds 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
                        Funds will meet their objectives.
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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 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 15
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VANGUARD BALANCED
INDEX FUND              The Fund invests in U.S. common stocks and bonds. It
                        seeks to replicate with respect to 60% of its assets the
                        performance of the Wilshire 5000 Index and with respect
                        to 40% of its assets, the Lehman Brothers Index. Under
                        normal circumstances the Fund will invest primarily in
                        securities of its underlying indexes.            PAGE 15
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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 Index.
                        - The EXTENDED MARKET PORTFOLIO seeks to replicate the
                          performance of the Wilshire 4500 Index.
 
                                        2
<PAGE>   4
 
                        - The TOTAL STOCK MARKET PORTFOLIO seeks to replicate
                          the performance of the Wilshire 5000 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 15
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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 Index.
                        - The EMERGING MARKETS PORTFOLIO seeks to parallel the
                          performance of the Morgan Stanley Capital
                          International -- Select Emerging 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 16
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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 17
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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 and
                        the Portfolios of Vanguard Index Trust and Vanguard
                        International Equity Index Fund 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, the
                        Portfolios of Vanguard International Equity Index Fund
                        and the 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>   5
 
                        Because of the risks associated with common stocks and
                        bonds, the Funds 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
                        Funds, see "Investment Risks".                   PAGE 24
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THE VANGUARD
GROUP                   The Funds 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 $190 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 45
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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 45
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FEES AND EXPENSES       The Portfolios are subject to the following transaction
                        fees:
 
<TABLE>
<CAPTION>
                                                                                      FEE DEDUCTED
                                                                    FEE DEDUCTED          FROM
                                                                   FROM PURCHASES     REDEMPTIONS
                           <S>                                     <C>              <C>
                           VANGUARD INDEX TRUST
                           Extended Market Portfolio                     .5%              None
                           Small Capitalization Stock Portfolio           1%              None
                           VANGUARD INTERNATIONAL EQUITY INDEX
                             FUND
                           European Portfolio                             1%              None
                           Pacific Portfolio                              1%              None
                           Emerging Markets Portfolio                     2%                1%
                           TOTAL INTERNATIONAL PORTFOLIO                  1%              None
</TABLE>
 
                        Portfolio transaction fees are paid directly to the
                        Portfolios to offset transaction costs of buying
                        securities of small- and medium-sized companies and
                        international companies.
 
                        Additionally, shareholders will also incur a $10 annual
                        account maintenance fee for each account in any of
                        Vanguard's Index Funds. This fee will be waived for
                        shareholders with an account balance of $10,000 or
                        more.                                            PAGE 52
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                                        4
<PAGE>   6
 
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 1995
                        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 1% portfolio transaction fee, payable directly to the
                                        Portfolio, on each purchase of shares.
                                   **   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.
</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%      0.21%      0.15%      0.14%        0.21%        0.12%
                                   Investment
                                    Advisory
                                    Fees..........    0.00      0.00       0.00       0.01       0.01         0.01         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       0.03         0.01         0.05
                                                   -------    -------   -------    -------    -------    ----------      -------
                                   Total Other
                                    Expenses......    0.03      0.04       0.04       0.04       0.05         0.03         0.07
                                                   -------    -------   -------    -------    -------    ----------      -------
                                      TOTAL
                                        OPERATING
                                       EXPENSES...    0.20%     0.25%      0.25%      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
                                    TRANSACTION    MARKET       BOND       TERM BOND        BOND     EUROPEAN    PACIFIC
                                      EXPENSES   PORTFOLIO   PORTFOLIO     PORTFOLIO     PORTFOLIO   PORTFOLIO  PORTFOLIO
                                   -----------------------------------------------------------------------------------------------
                                   <S>           <C>         <C>         <C>             <C>         <C>        <C>
                                   Sales Load
                                    Imposed on
                                    Purchases....    None       None          None          None        None*      None*
                                   Sales Load
                                    Imposed on
                                    Reinvested
                                    Dividends....    None       None          None          None        None       None
                                   Redemption
                                    Fees++.......    None       None          None          None        None       None
                                   Exchange
                                    Fees.........    None       None          None          None        None       None
 
<CAPTION>
 
                                    SHAREHOLDER    EMERGING       TOTAL
                                    TRANSACTION     MARKETS   INTERNATIONAL
                                      EXPENSES     PORTFOLIO    PORTFOLIO
                                   ----------------------------------------
                                   <S>            <C>         <C>
                                   Sales Load
                                    Imposed on
                                    Purchases....     None+       None*
                                   Sales Load
                                    Imposed on
                                    Reinvested
                                    Dividends....     None         None
                                   Redemption
                                    Fees++.......        1%**      None
                                   Exchange
                                    Fees.........     None         None
                                   *    Shareholders are charged a 1% portfolio transaction fee, payable directly to the
                                        Portfolio on each purchase of shares.
                                   **   The 1% portfolio transaction fee withheld from redemption proceeds is paid to the
                                        Portfolio.
                                   +    Shareholders are charged a 2% 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.
</TABLE>
 
                                        5
<PAGE>   7
<TABLE>
<CAPTION>
                                                                      TOTAL     SHORT-
                                                ANNUAL FUND           BOND       TERM     INTERMEDIATE-  LONG-TERM
                                                 OPERATING           MARKET      BOND       TERM BOND      BOND     EUROPEAN
                                                 EXPENSES           PORTFOLIO  PORTFOLIO    PORTFOLIO    PORTFOLIO  PORTFOLIO
                                        <S>                         <C>        <C>        <C>            <C>        <C>
                                        -------------------------------------------------------------------------------------
                                        Management & Administrative
                                         Expenses***...............    0.14%      0.14%        0.15%        0.01%     0.26%
                                        Investment Advisory
                                         Fees......................    0.01       0.01         0.01         0.01      0.01
                                        12b-1 Fees.................    None       None         None         None      None
                                        Other Expenses
                                         Distribution Costs........    0.03       0.02         0.02         0.01      0.02
                                         Miscellaneous Expenses....    0.02       0.03         0.02         0.17      0.06
                                                                     ------     ------     --------       ------    ------
                                        Total Other Expenses.......    0.05       0.05         0.04         0.18      0.08
                                                                     ------     ------     --------       ------    ------
                                           TOTAL OPERATING
                                            EXPENSES...............    0.20%(1)   0.20%        0.20%        0.20%     0.35%
                                                                     ======     ======     ========       ======    ====== 
                                        *** In addition to these costs, shareholders incur 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.
 
<CAPTION>
 
                                                ANNUAL FUND                     EMERGING      TOTAL
                                                 OPERATING            PACIFIC   MARKETS   INTERNATIONAL
                                                 EXPENSES            PORTFOLIO  PORTFOLIO   PORTFOLIO
                                        <S>                         <C>         <C>       <C>
                                        ---------------------------------------------------------------
                                        Management & Administrative
                                         Expenses***...............     0.25%     0.09%        0.24%
                                        Investment Advisory
                                         Fees......................     0.01      0.03         0.01
                                        12b-1 Fees.................     None      None         None
                                        Other Expenses
                                         Distribution Costs........     0.02      0.02         0.02
                                         Miscellaneous Expenses....     0.07      0.46         0.11
                                                                      ------    ------     --------
                                        Total Other Expenses.......     0.09      0.48         0.13
                                                                      ------    ------     --------
                                           TOTAL OPERATING
                                            EXPENSES...............     0.35%     0.60%        0.38%
                                                                      ======    ======     ========
                                        *** In addition to these costs, shareholders incur 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
TRANSACTION FEES        The Small Capitalization Stock Portfolio of Vanguard
                        Index Trust, the European and Pacific Portfolios of
                        Vanguard International Equity Index Fund, and Vanguard
                        Total International Portfolio assess a portfolio
                        transaction fee on purchases of Portfolio shares equal
                        to 1% of the dollar amount invested. The Extended Market
                        Portfolio of Vanguard Index Trust assesses a portfolio
                        transaction fee equal to 0.5% of the dollar amount
                        invested. The Emerging Markets Portfolio of Vanguard
                        International Equity Index Fund assess a portfolio
                        transaction fee equal to 2% of the dollar amount
                        invested. The portfolio transaction fees are paid to the
                        respective Portfolio, not to Vanguard. They are not
                        sales charges.
 
                        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).
 
                        The fees represent Vanguard's estimate of the brokerage
                        and other transaction costs incurred by the Portfolios
                        in acquiring stocks in their
 
                                        6
<PAGE>   8
 
                        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% redemption
                        transaction fee. 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 and $10 annually 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. 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 example
                        includes the $10 account maintenance fee for each
                        Portfolio; the 1% portfolio transaction fee for the
                        Extended Market and Small Capitalization Stock
                        Portfolios of Vanguard Index Trust, the European and
                        Pacific Portfolios of Vanguard International Equity
                        Index Fund and the Total International Portfolio; the
                        0.25% transaction fee for the Total Stock Market
                        Portfolio of Vanguard Index Trust; and the 2% purchase
                        transaction fee and the 1% redemption transaction fee
                        for the Emerging Markets Portfolio of Vanguard
                        International Equity Index Fund.
 
                                        7
<PAGE>   9
 
<TABLE>
<CAPTION>
                                                             1         3         5         10
                                                            YEAR     YEARS     YEARS     YEARS
                                                            ---      ----      ----       ----
                        <S>                                <C>      <C>       <C>       <C>
                        Total Bond Market Portfolio......   $ 12      $36      $  61      $124
                        Short-Term Bond Portfolio........   $ 12      $36      $  61      $124
                        Intermediate-Term Bond
                          Portfolio......................   $ 12      $36      $  61      $124
                        Long-Term Bond Portfolio.........   $ 12      $36      $  61      $124
                        Balanced Index Fund..............   $ 12      $36      $  61      $124
                        500 Portfolio....................   $ 12      $36      $  61      $124
                        Extended Market Portfolio........   $ 15      $40      $  66      $133
                        Total Stock Market Portfolio.....   $ 13      $38      $  64      $130
                        Value Portfolio..................   $ 12      $36      $  61      $124
                        Growth Portfolio.................   $ 12      $36      $  61      $124
                        Small Capitalization Stock
                          Portfolio......................   $ 23      $48      $  74      $140
                        European Portfolio...............   $ 24      $51      $  79      $152
                        Pacific Portfolio................   $ 24      $51      $  78      $152
                        Emerging Markets Portfolio.......   $ 46      $79      $ 114      $204
                        Total International Portfolio....   $ 24      $52      $  81      $155
</TABLE>
 
                        Included in these estimates are account maintenance fees
                        of $10, $30, $50 and $100 for the respective periods
                        shown. The $10 account maintenance fee is a flat charge
                        which does not vary by the size of your investment.
                        Accordingly, for investments larger than $1,000, your
                        total expenses will be substantially lower in percentage
                        terms than this illustration implies.
 
                        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, 1995, have been audited by Price
                        Waterhouse LLP, independent accountants, whose reports
                        thereon were unqualified. (Please note that Vanguard
                        Total International Portfolio began operations on April
                        29, 1996.) 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 1995 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 1995 Annual Report
                        to Shareholders and inserts thereto. For a more complete
                        discussion of each Fund's performance, please see the
                        1995 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.
 
                                        8
<PAGE>   10
 
<TABLE>
<CAPTION>
                          -------------------------------------------------------------------------------------------------------
                                                                TOTAL BOND MARKET PORTFOLIO
                          -------------------------------------------------------------------------------------------------------
                                                           YEAR ENDED DECEMBER 31,
                          -----------------------------------------------------------------------------------------    DEC. 9,+
                           1995       1994       1993       1992      1991      1990      1989      1988      1987    TO 31, 1986
<S>                       <C>        <C>        <C>        <C>        <C>       <C>       <C>       <C>       <C>     <C>
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING
 OF PERIOD................  $9.17    $10.06      $9.88      $9.99     $9.41     $9.44     $9.05     $9.20     $9.94      $10.00
                          ------     ------     ------      -----     -----     -----     -----     -----     -----     -------
INVESTMENT OPERATIONS
 Net Investment Income....   .650      .622       .638       .699      .766      .796      .797      .807      .834        .028
 Net Realized and
   Unrealized Gain (Loss)
   on Investments.........   .970     (.888)      .300      (.018)     .605     (.030)     .390     (.150)    (.740)      (.060)
                          ------     ------     ------      -----     -----     -----     -----     -----     -----     -------
       TOTAL FROM
        INVESTMENT
        OPERATIONS........  1.620     (.266)      .938       .681     1.371      .766     1.187      .657      .094       (.032)
- ---------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income......  (.650)    (.622)     (.638)     (.699)    (.766)    (.796)    (.797)    (.807)    (.834)      (.028)
 Distributions from
   Realized Capital
   Gains..................     --     (.002)     (.120)     (.092)    (.025)       --        --        --        --          --
                          ------     ------     ------      -----     -----     -----     -----     -----     -----     -------
       TOTAL
        DISTRIBUTIONS.....  (.650)    (.624)     (.758)     (.791)    (.791)    (.796)    (.797)    (.807)    (.834)      (.028)
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF
 PERIOD................... $10.14     $9.17     $10.06      $9.88     $9.99     $9.41     $9.44     $9.05     $9.20       $9.94
- ---------------------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN(1)...........  18.18%    (2.66)%     9.68%      7.14%    15.25%     8.65%    13.65%     7.35%     1.14%      (0.21)%
- ---------------------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period
 (Millions)............... $2,405    $1,731     $1,540     $1,066      $849      $277      $139       $58       $43          $3
Ratio of Expenses to
 Average Net Assets.......    .20%      .18%       .18%       .20%      .16%      .21%      .24%      .30%      .14%          0%
Ratio of Net Investment
 Income to Average Net
 Assets...................   6.66%     6.57%      6.24%      7.06%     7.95%     8.60%     8.49%     8.84%     9.01%       6.82%*
Portfolio Turnover Rate...     36%       33%        50%        49%       31%       29%       33%       21%       77%          0%
</TABLE>
   * Annualized.
 (1) Total return figures are adjusted to reflect the annual account maintenance
     fee of $10.
   + Commencement of operations.

 
<TABLE>
<CAPTION>
                                                                 ----------------------------------------------------------------
                                                                   SHORT-TERM          INTERMEDIATE-TERM          LONG-TERM
                                                                 BOND PORTFOLIO         BOND PORTFOLIO         BOND PORTFOLIO
                                                                 ----------------------------------------------------------------
                                                                       MAR. 1+ TO             MAR. 1+ TO             MAR. 1+ TO
                                                               1995   DEC. 31, 1994   1995   DEC. 31, 1994   1995   DEC. 31, 1994
<S>                                                           <C>     <C>            <C>     <C>            <C>     <C>
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.........................  $9.50     $ 10.00      $8.96     $ 10.00      $9.18     $ 10.00
                                                              ------   ---------     ------   ---------     ------   ---------
INVESTMENT OPERATIONS
 Net Investment Income.......................................   .623        .463       .692        .533       .661        .586
 Net Realized and Unrealized Gain (Loss) on Investments......   .570       (.500)     1.884       (.820)     1.217      (1.040)
                                                               -----    --------      -----    --------      -----    --------
       TOTAL FROM INVESTMENT OPERATIONS......................  1.193       (.037)     2.576       (.287)     1.878       (.454)
- ---------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income........................  (.623)      (.463)     (.692)      (.533)     (.661)      (.586)
 Distributions from Realized Capital Gains...................     --          --      (.024)         --      (.027)         --
                                                               -----    --------      -----    --------      -----    --------
       TOTAL DISTRIBUTIONS...................................  (.623)      (.463)     (.716)      (.533)     (.688)      (.586)
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD............................... $10.07       $9.50     $10.82       $9.18     $10.37       $8.96
- ---------------------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN(1)..............................................  12.88%      (0.37)%    29.72%      (2.88)%    21.07%      (4.53)%
- ---------------------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).........................   $208         $77        $24         $71       $346          $9
Ratio of Expenses to Average Net Assets......................    .20%        .18%*      .20%        .18%*      .20%        .18%*
Ratio of Net Investment Income to Average Net Assets.........   6.28%       5.77%*     6.90%       6.88%*     6.55%       7.70%*
Portfolio Turnover Rate......................................     65%         53%*       45%         63%*       71%         70%*
</TABLE>
   * Annualized.
 (1) Returns 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.

 
                                        9
<PAGE>   11
 
<TABLE>
<CAPTION>
                                                                                  --------------------------------------------
                                                                                                VANGUARD BALANCED
                                                                                                   INDEX FUND
                                                                                  --------------------------------------------
                                                                                           YEAR ENDED
                                                                                          DECEMBER 31,            SEPT. 28, TO
                                                                                  ---------------------------       DEC. 31,
                                                                                    1995       1994     1993          1992
<S>                                                                                <C>        <C>      <C>        <C>
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.............................................  $10.34     $10.91   $10.31        $10.00
                                                                                   ------     ------   ------     ---------
INVESTMENT OPERATIONS
 Net Investment Income...........................................................     .45        .41      .39           .08
 Net Realized and Unrealized Gain (Loss) on Investments..........................    2.48       (.58)     .63           .31
                                                                                    -----      -----    -----      --------
       TOTAL FROM INVESTMENT OPERATIONS..........................................    2.98       (.17)    1.02           .39
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income............................................    (.45)      (.40)    (.39)         (.08)
 Distributions from Realized Capital Gains.......................................    (.05)        --     (.03)           --
                                                                                    -----      -----    -----      --------
       TOTAL DISTRIBUTIONS.......................................................    (.50)      (.40)    (.42)         (.08)
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD...................................................  $12.77     $10.34   $10.91        $10.31
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN**...................................................................   28.64%     (1.56)%  10.00%         3.69%
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).............................................    $590       $403     $367          $109
Ratio of Expenses to Average Net Assets..........................................     .20%       .20%     .20%          .22%*
Ratio of Net Investment Income to Average Net Assets.............................    3.85%      3.86%    3.53%         3.76%*
Portfolio Turnover Rate..........................................................      16%        16%      25%           17%
</TABLE>
 * 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.
 
<TABLE>
<CAPTION>
                                       ------------------------------------------------------------------------------------------
                                                                             500 PORTFOLIO
                                       ------------------------------------------------------------------------------------------
                                                                        YEAR ENDED DECEMBER 31,
                                       ------------------------------------------------------------------------------------------
                                        1995      1994     1993     1992     1991     1990     1989     1988     1987      1986
<S>                                    <C>       <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF
 PERIOD..............................   $42.97   $43.83   $40.97   $39.32   $31.24   $33.64   $27.18   $24.65   $24.27     $22.99
                                        ------    -----    -----   ------   ------   ------   ------   ------   ------     ------
INVESTMENT OPERATIONS
 Net Investment Income...............     1.22     1.18     1.13     1.12     1.15     1.17     1.20     1.08      .88        .89
 Net Realized and Unrealized Gain
   (Loss) on Investments.............    14.76     (.67)    2.89     1.75     8.20    (2.30)    7.21     2.87      .36       3.30
                                        ------    -----    -----    -----    -----    -----    -----    -----    -----      -----
       TOTAL FROM INVESTMENT
        OPERATIONS...................    15.98      .51     4.02     2.87     9.35    (1.13)    8.41     3.95     1.24       4.19
- ---------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment
   Income............................    (1.22)   (1.17)   (1.13)   (1.12)   (1.15)   (1.17)   (1.20)   (1.10)    (.69)     (.89)
 Distributions from Realized Capital
   Gains.............................     (.13)    (.20)    (.03)    (.10)    (.12)    (.10)    (.75)    (.32)    (.17)    (2.02)
                                        ------    -----    -----    -----    -----    -----    -----    -----    -----      -----
       TOTAL DISTRIBUTIONS...........    (1.35)   (1.37)   (1.16)   (1.22)   (1.27)   (1.27)   (1.95)   (1.42)    (.86)    (2.91)
- ---------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.......   $57.60   $42.97   $43.83   $40.97   $39.32   $31.24   $33.64   $27.18   $24.65     $24.27
- ---------------------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN*........................    37.45%    1.18%    9.89%    7.42%   30.22%   (3.32)%  31.36%   16.22%    4.71%    18.06%
- ---------------------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period
 (Millions)..........................  $17,372   $9,356   $8,273   $6,547   $4,345   $2,173   $1,804   $1,055     $826       $485
Ratio of Expenses to Average
 Net Assets..........................      .20%     .19%     .19%     .19%     .20%     .22%     .21%     .22%     .26%      .28%
Ratio of Net Investment Income to
 Average Net Assets..................     2.38%    2.72%    2.65%    2.81%    3.07%    3.60%    3.62%    4.08%    3.15%     3.40%
Portfolio Turnover Rate..............        4%+      6%+      6%+      4%+      5%+     23%+      8%      10%      15%       29%
</TABLE>
*Total return figures do not reflect the annual account maintenance fee of $10.
+Portfolio turnover rates excluding in-kind redemptions were 2%, 4%, 2%, 1%,
 1%, and 6%, respectively.
 
                                       10
<PAGE>   12
<TABLE>
<CAPTION>
                            -------------------------------------------------------------------------------------------------
                                                                  EXTENDED MARKET PORTFOLIO
                            -------------------------------------------------------------------------------------------------
                                                          YEAR ENDED DECEMBER 31,                                
                            ----------------------------------------------------------------------------------    DEC. 21, +
                             1995       1994       1993       1992       1991       1990       1989       1988    TO 31, 1987
<S>                         <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>      <C>         
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE,
 BEGINNING OF PERIOD....    $18.52     $19.43     $17.35     $15.82     $11.48     $13.92     $11.60      $9.99      $10.00
                             -----      -----     ------     ------     ------     ------     ------     ------    --------
INVESTMENT OPERATIONS
 Net Investment
   Income...............       .30        .28        .23        .24        .25        .30        .26        .34         .03
 Net Realized and
   Unrealized Gain
   (Loss) on
   Investments..........      5.95       (.62)      2.28       1.72       4.54      (2.25)      2.52       1.63        (.04)
                             -----      -----      -----      -----      -----      -----      -----      -----     -------
   TOTAL FROM INVESTMENT
     OPERATIONS.........      6.25       (.34)      2.51       1.96       4.79      (1.95)      2.78       1.97        (.01)
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income....      (.30)      (.28)      (.23)      (.25)      (.25)      (.33)      (.23)      (.20)         --
 Distributions from
   Realized Capital
   Gains................      (.40)      (.29)      (.20)      (.18)      (.20)      (.16)      (.23)      (.16)         --
                             -----      -----      -----      -----      -----      -----      -----      -----     -------
   TOTAL
     DISTRIBUTIONS......      (.70)      (.57)      (.43)      (.43)      (.45)      (.49)      (.46)      (.36)         --
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF
 PERIOD.................    $24.07     $18.52     $19.43     $17.35     $15.82     $11.48     $13.92     $11.60       $9.99
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN*...........     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)......    $1,523       $967       $928       $585       $372       $179       $147        $35          $5
Ratio of Expenses to
 Average Net Assets.....       .25%       .20%       .20%       .20%       .19%       .23%       .23%       .24%          0%
Ratio of Net Investment
 Income to Average Net
 Assets.................      1.51%      1.51%      1.48%      1.73%      2.14%      2.68%      2.92%      2.90%          0%
Portfolio Turnover
 Rate...................        15%        19%        13%         9%        11%         9%        14%        26%          3%
</TABLE>

* Total return figures do not reflect the 1% transaction fee on purchases or 
  the annual account maintenance fee of $10.
+ Commencement of Operations.
 
<TABLE>
<CAPTION>
            ------------------------------------------------------------------------------------------------------------------
                         TOTAL STOCK
                     MARKET PORTFOLIO***                    GROWTH PORTFOLIO**                     VALUE PORTFOLIO**
            --------------------------------------  ------------------------------------  ------------------------------------
                                       MARCH 16+,                              NOV. 2,                               NOV. 2,
              YEAR ENDED DEC. 31,       1992, TO      YEAR ENDED DEC. 31,      1992, TO     YEAR ENDED DEC. 31,      1992, TO
            ------------------------    DEC. 31,    ------------------------   DEC. 31,   ------------------------   DEC. 31,
             1995     1994     1993       1992       1995     1994     1993      1992      1995     1994     1993      1992
<S>         <C>      <C>      <C>      <C>          <C>      <C>      <C>      <C>        <C>      <C>      <C>      <C>      
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET
 VALUE,
 BEGINNING
 OF
 PERIOD...  $11.37   $11.69   $10.84     $10.00     $10.28   $10.20   $10.26    $10.00    $11.12   $11.74   $10.30    $10.00
             -----    -----    -----    -------     ------   ------   ------   -------    ------   ------   ------   -------
INVESTMENT
OPERATIONS
 Net
Investment
 Income...     .29      .27      .26        .23        .21      .21      .21       .06       .41      .38      .38       .07
 Net
  Realized
   and
Unrealized
   Gain
   (Loss)
   on
   Invest-
   ments...   3.75     (.29)     .88        .84       3.68      .08     (.06)      .26      3.66     (.46)    1.50       .30
             -----    -----    -----    -------      -----    -----    -----    ------     -----    -----    -----    ------
   TOTAL
     FROM
INVESTMENT
   OPERA-
   TIONS...   4.04     (.02)    1.14       1.07       3.89      .29      .15       .32      4.07     (.08)    1.88       .37
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends
   from
   Net
Investment
 Income...    (.28)    (.27)    (.26)      (.23)      (.20)    (.21)    (.21)     (.06)     (.40)    (.38)    (.38)     (.07)
 Distribu-
   tions
   from
   Realized
   Capital
  Gains...    (.09)    (.03)    (.03)        --         --       --       --        --        --     (.16)    (.06)       --
             -----    -----    -----    -------      -----    -----    -----    ------     -----    -----    -----    ------
   TOTAL
   DISTRIBU-
   TIONS...   (.37)    (.30)    (.29)      (.23)      (.20)    (.21)    (.21)     (.06)     (.40)    (.54)    (.44)     (.07)
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET
 VALUE,
 END OF
 PERIOD...  $15.04   $11.37   $11.69     $10.84     $13.97   $10.28   $10.20    $10.26    $14.79   $11.12   $11.74    $10.30
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
TOTAL
 RETURN...   35.79%   (0.17)%  10.62%     10.41%     38.06%    2.89%    1.53%     3.19%    36.94%   (0.73)%  18.35%     3.70%
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUP-
 PLEMENTAL
 DATA
Net
 Assets,
 End of
 Period
 (Mil-
 lions)...  $1,571     $786     $512       $275       $271      $86      $51       $21      $496     $297     $190       $24
Ratio of
 Expenses
 to
 Average
 Net
 Assets...     .25%     .20%     .20%       .21%*      .20%     .20%     .20%        0%*     .20%     .20%     .20%        0%*
Ratio of
 Net
Investment
 Income to
 Average
 Net
 Assets...    2.14%    2.35%    2.31%      2.42%*     1.71%    2.08%    2.10%     2.85%*    3.06%    3.37%    3.26%     3.46%*
Portfolio
 Turnover
 Rate.....       3%       2%       1%         3%        24%      28%      36%        2%       27%      32%      30%        4%
</TABLE>

   * Annualized.
  ** Total return figures do not reflect the annual account maintenance fee 
     of $10 or applicable portfolio transaction fees.
 *** Total return figures do not reflect the .25% transaction fee on purchases
     or the annual account maintenance fee of $10. 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.
 
                                      11
<PAGE>   13
 
<TABLE>
<CAPTION>
                                                     --------------------------------------------------------------------------
                                                                       SMALL CAPITALIZATION STOCK PORTFOLIO(1)
                                                     --------------------------------------------------------------------------
                                                                            OCT. 1,
                                                              FEB. 1 TO     1993 TO              YEAR ENDED SEPTEMBER 30,
                                                               DEC. 31,     JAN. 31,     --------------------------------------
                                                     1995       1994**       1994**      1993      1992      1991     1990(2)
<S>                                                 <C>       <C>           <C>         <C>       <C>       <C>       <C> 
- -------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD............... $14.99      $16.24       $16.23     $12.63    $12.03     $8.55    $11.88
                                                    ------    --------      -------     ------    ------    ------    -------
INVESTMENT OPERATIONS
 Net Investment Income (Loss)......................    .24         .20          .05        .20       .19       .20       .17
 Net Realized and Unrealized Gain (Loss) on
   Investments.....................................   4.06        (.86)         .96       3.73       .88      3.60     (3.46 )
                                                     -----     -------       ------      -----     -----     -----    ------
   TOTAL FROM INVESTMENT OPERATIONS................   4.30        (.66)        1.01       3.93      1.07      3.80     (3.29 )
- -------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income..............   (.23)       (.22)        (.18)      (.18)     (.18)     (.18)     (.04 )
 Distributions from Realized Capital Gains.........   (.45)       (.37)        (.82)      (.15)     (.29)     (.14)       --
                                                     -----     -------       ------      -----     -----     -----    ------
   TOTAL DISTRIBUTIONS.............................   (.68)       (.59)       (1.00)      (.33)     (.47)     (.32)     (.04 )
- -------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD..................... $18.61      $14.99       $16.24     $16.23    $12.63    $12.03     $8.55
- -------------------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN++.....................................  28.74%      (4.00)%       6.65%     31.60%     9.34%    45.91%   (27.73 )%
- -------------------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)...............   $971        $605         $533       $432      $202      $111       $40
Ratio of Expenses to Average Net Assets............    .25%        .17%*        .18%*      .18%      .18%      .21%      .31 %
Ratio of Net Investment Income (Loss) to
 Average Net Assets................................   1.58%       1.50%*       1.16%*     1.47%     1.65%     2.11%     1.91 %
Portfolio Turnover Rate............................     28%         25%*          5%*       26%       26%       33%       40 %
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                     -----------------------------------------
                                                                                       SMALL CAPITALIZATION STOCK PORTFOLIO(1)
                                                                                     -----------------------------------------
                                                                                               YEAR ENDED SEPTEMBER 30,
                                                                                     -----------------------------------------
                                                                                     1989+       1988       1987       1986
<S>                                                                                  <C>        <C>        <C>        <C>
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD...............................................  $11.96     $15.73     $13.24     $11.68
                                                                                     ------     ------     ------     ------
INVESTMENT OPERATIONS
 Net Investment Income (Loss)......................................................     .10        .03       (.04)      (.01)
 Net Realized and Unrealized Gain (Loss) on Investments............................    2.13      (2.59)      4.42       1.57
                                                                                      -----      -----      -----      -----
   TOTAL FROM INVESTMENT OPERATIONS................................................    2.23      (2.56)      4.38       1.56
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income..............................................    (.14)        --         --         --
 Distributions from Realized Capital Gains.........................................   (2.17)     (1.21)     (1.89)        --
                                                                                      -----      -----      -----      -----
   TOTAL DISTRIBUTIONS.............................................................   (2.31)     (1.21)     (1.89)        --
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.....................................................  $11.88     $11.96     $15.73     $13.24
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN++.....................................................................   18.83%    (14.30)%    38.02%     13.33%
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)...............................................     $20        $27        $35        $31
Ratio of Expenses to Average Net Assets............................................    1.00%       .95%       .92%       .92%
Ratio of Net Investment Income (Loss) to Average Net Assets........................     .65%       .24%      (.25)%     (.06)%
Portfolio Turnover Rate............................................................     160%        68%        92%        92%
</TABLE>
   * 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.
   + Prior to September 11, 1989, Schroder Capital Management International
     provided investment advisory services to the Fund. Effective September 11,
     1989, The Vanguard Group, Inc. began providing investment advisory
     services to the Fund on an at-cost basis.
  ++ Total return figures do not reflect the annual account maintenance fees
     of $10 or applicable portfolio transaction fees.

 
                                       12
<PAGE>   14
 
<TABLE>
<CAPTION>
                                                               ----------------------------------------------------------------
                                                                                    EUROPEAN PORTFOLIO(1)
                                                               ----------------------------------------------------------------
                                                                            YEAR ENDED DECEMBER 31,                  MAY 1+ TO
                                                               -------------------------------------------------      DEC. 31,
                                                                1995       1994       1993       1992      1991        1990
<S>                                                            <C>        <C>        <C>        <C>        <C>       <C>
- -------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.........................  $11.76     $11.88      $9.33      $9.92     $9.06       $10.00
                                                                -----     ------     ------      -----     -----       ------
INVESTMENT OPERATIONS
 Net Investment Income.......................................     .32        .28        .17        .25       .26          .16
 Net Realized and Unrealized Gain (Loss) on Investments......    2.30       (.06)      2.55       (.58)      .86         (.94)
                                                                -----     ------     ------      -----     -----       ------
   TOTAL FROM INVESTMENT OPERATIONS..........................    2.62        .22       2.72       (.33)     1.12         (.78)
- -------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income........................    (.32)      (.28)      (.17)      (.26)     (.26)        (.16)
 Distributions from Realized Capital Gains...................    (.04)      (.06)        --         --        --           --
                                                                -----     ------     ------      -----     -----       ------
   TOTAL DISTRIBUTIONS.......................................    (.36)      (.34)      (.17)      (.26)     (.26)        (.16)
- -------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD...............................  $14.02     $11.76     $11.88      $9.33     $9.92        $9.06
- -------------------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN.................................................   22.28%      1.88%     29.13%     (3.32)%   12.40%       (7.23)%
- -------------------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).........................  $1,017       $715       $601       $256      $161          $96
Ratio of Expenses to Average Net Assets......................     .35%       .32%       .32%       .32%      .33%         .40%*
Ratio of Net Investment Income to Average Net Assets.........    2.66%      2.41%      2.05%      3.05%     3.06%        3.68%*
Portfolio Turnover Rate......................................       2%         6%         4%         1%       15%**         3%
</TABLE>
   * 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>
<CAPTION>
                                                               -----------------------------------------------------------------
                                                                                    PACIFIC PORTFOLIO(1)
                                                               -----------------------------------------------------------------
                                                                            YEAR ENDED DECEMBER 31,                  MAY 1+ TO
                                                               -------------------------------------------------      DEC. 31,
                                                                1995       1994       1993       1992      1991        1990
<S>                                                            <C>        <C>        <C>        <C>        <C>       <C>
- --------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.........................  $11.31     $10.13      $7.56       $9.42     $8.56       $10.00
                                                               ------      -----     ------      ------     -----       ------
INVESTMENT OPERATIONS
 Net Investment Income.......................................     .10        .08        .06         .05       .05          .05
 Net Realized and Unrealized Gain (Loss) on Investments......     .21       1.24       2.62       (1.76)      .86        (1.44)
                                                               ------      -----     ------      ------     -----       ------
   TOTAL FROM INVESTMENT OPERATIONS..........................     .31       1.32       2.68       (1.71)      .91        (1.39)
- --------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income........................    (.12)      (.08)      (.06)       (.05)     (.05)        (.05)
 Distributions from Realized Capital Gains...................      --       (.06)      (.05)       (.10)       --           --
                                                               ------      -----     ------      ------     -----       ------
   TOTAL DISTRIBUTIONS.......................................    (.12)      (.14)      (.11)       (.15)     (.05)        (.05)
- --------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD...............................  $11.50     $11.31     $10.13       $7.56     $9.42        $8.56
- --------------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN.................................................   (2.75)%    13.04%     35.46%     (18.17)%   10.65%      (14.01)%
- --------------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).........................     $31       $697       $493        $207       $84          $31
Ratio of Expenses to Average Net Assets......................     .35%       .32%       .32%        .32%      .32%         .35%*
Ratio of Net Investment Income to Average Net Assets.........     .97%       .71%       .75%        .92%      .70%        1.02%*
Portfolio Turnover Rate......................................       1%         4%         7%          3%       21%**         2%
</TABLE>
   * 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.
                                       13
<PAGE>   15
<TABLE>
<CAPTION>

                                                                                              -------------------------------  
                                                                                                 EMERGING MARKETS PORTFOLIO 
                                                                                              -------------------------------
                                                                                              YEAR ENDED
                                                                                              DECEMBER 31,         MAY 4+ TO
                                                                                              -----------           DEC. 31,
                                                                                                  1995                1994 
<S>                                                                                            <C>                   <C>
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD.........................................................     $10.37               $10.00
                                                                                               ---------                -----
INVESTMENT OPERATIONS
 Net Investment Income.......................................................................        .15                  .06
 Net Realized and Unrealized Gain (Loss) on Investments......................................       (.09)                 .92
                                                                                               ---------                -----
   TOTAL FROM INVESTMENT OPERATIONS..........................................................        .06                  .98
- ------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income........................................................       (.18)                (.07)
 Distributions from Realized Capital Gains...................................................         --                 (.04)

   Total DISTRIBUTIONS.......................................................................       (.18)                (.11)
- ------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD...............................................................     $10.75               $10.87
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN(1)..............................................................................        .56%                9.81%
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions).........................................................       $234                  $83
Ratio of Expenses to Average Net Assets......................................................        .60%                 .60%*
Ratio of Net Investment Income to Average Net Assets.........................................       2.00%                1.32%*
Portfolio Turnover Rate......................................................................          3%                   6%
</TABLE>

   * 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.
 
- --------------------------------------------------------------------------------
 
YIELD AND TOTAL
RETURN                  From time to time a Portfolio of the Vanguard Index
                        Funds 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.
- --------------------------------------------------------------------------------
 
                                       14
<PAGE>   16
 
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.
                        --------------------------------------------------------
 
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 and, with respect to 40% of its assets,
                        the investment performance of 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 securities included in the
                        index generally have an outstanding market value of at
                        least $25 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 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 Index, an index
 
                                       15
<PAGE>   17
 
                          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 4500 Index.
 
                        - The SMALL CAPITALIZATION STOCK PORTFOLIO seeks to
                          replicate the aggregate price and yield performance of
                          the Russell 2000 Small Stock 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.
 
                        There is no assurance that the Portfolios will achieve
                        their stated objectives.
  ------------------------------------------------------------------------------
 
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"), a diversified, capitalization weighted
                        index consisting of companies located in Australia,
                        Japan, Hong Kong, New Zealand, Singapore and Malaysia.
                        There is no assurance that either Portfolio will achieve
                        its stated objective.
 
                        By holding both 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, Australia and Far
                        East (Free) Index ("EAFE Free"), a broadly diversified
                        international index consisting of more than 1,000 equity
                        securities of companies located outside of the United
                        States. As of December, 31, 1995, the MSCI-Pacific
                        (Free) Index represented approximately 51% of the market
                        capitalization of EAFE (Free), while the MSCI-Europe
                        (Free) Index represented the remaining 49%.
 
                                       16
<PAGE>   18
 
                        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
                        12 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, Australia, and Far East + Select
                        Emerging Markets (Free) Index (the MSCI -- EAFE + Select
                        EMF Index) by investing in a combination of the
                        European, Pacific, and Emerging Markets Portfolios of
                        Vanguard International Equity Index Fund.
 
                        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.
- --------------------------------------------------------------------------------
 
INVESTMENT
POLICIES

EACH FUND USES
A "PASSIVE"
INVESTMENT APPROACH     The Funds 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 Funds, utilizing a "passive" or
                        indexing investment approach, attempt to approximate the
                        investment performance of their respective indexes
                        through statistical procedures. The Funds are managed
                        without regard to tax ramifications.
 
                        Each Fund is responsible for voting the shares of all
                        securities it holds.
 
                        The investment policies of the Funds are not fundamental
                        and so may be changed by the Board of Directors 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
 
                                       17
<PAGE>   19
 
                        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, agency securities and 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 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, 1995, 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       53%          86%          60%            68%
                           Corporate bonds           16%          13%          29%            26%
                           International
                             (dollar-
                             denominated) bonds      3%           1%           11%             6%
                           Mortgage-backed
                             securities              28%          0%            0%             0%
                           Dollar-weighted
                             Average Maturity
                             (Years)               8.5 yrs      2.7 yrs      7.6 yrs        23.3 yrs
</TABLE>
 
                        The 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 U.S. Treasury
                        bonds) than
 
                                       18
<PAGE>   20
 
                        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" 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
 
                                       19
<PAGE>   21
 
                        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 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 stock 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 1,600 and 1,800 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. 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 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 portfolio
                        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.
 
                                       20
<PAGE>   22
 
                        Typically, the Portfolio invests in approximately 1,900
                        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 7,000
                        stocks included in the Wilshire 5000 Index. Typically,
                        the Portfolio invests in approximately 1,900 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 5000 Index.
 
                        The SMALL CAPITALIZATION STOCK PORTFOLIO invests in a
                        statistically selected sample of the approximately 2,000
                        stocks included in the Russell 2000 Index. Typically,
                        the Portfolio invests in approximately 1,400 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, 1995, the S&P/BARRA Value
                        Index included 315 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, 1995, the S&P/BARRA Growth
                        Index included 185 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 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
 
                                       21
<PAGE>   23
 
                        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
                        countries. Three countries, the United Kingdom, Germany
                        and France, dominate MSCI-Europe (Free), with 34%, 14%,
                        and 13% of the market capitalization of the Index,
                        respectively, as of December 31, 1995. 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 81% of the market capitalization of
                        the Index as of December 31, 1995.
 
                        The European and Pacific 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 of the two
                        Portfolios 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.
 
                        Each of the two 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. 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, and warrants
                        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.
 
                                       22
<PAGE>   24
 
                        The European and Pacific 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.
 
                        The EMERGING MARKETS PORTFOLIO invests in a
                        statistically selected sample of 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 17%, 15%, 14% and 11% of the market
                        capitalization of the Index, respectively, as of March
                        31, 1996.
 
                        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 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.
 
                        Under normal circumstances at least 80% of the assets of
                        the Portfolio will be invested in stocks that are
                        represented in the Index and futures contracts and
                        options thereon. The Portfolio may also invest up to 50%
                        of its assets in stock futures contracts, options,
                        warrants, convertible securities or 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 the Portfolio's assets would be
                        made in emergency situations, for short-term purposes.
 
                        See "Implementation of Policies" for a description of
                        these and other investment practices of the Portfolios.
  ------------------------------------------------------------------------------
 
                                       23
<PAGE>   25
 
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, Australia, and Far East +
                        Select Emerging Markets (Free) Index. As of December 31,
                        1995, the European and Pacific markets each contributed
                        approximately 45%, and the Emerging Markets contributed
                        10% to the Index's market capitalization.
 
                        See "Implementation of Policies" for a description of
                        these and other investment practices of the Portfolio.
- --------------------------------------------------------------------------------
 
INVESTMENT
RISKS
EACH PORTFOLIO IS
SUBJECT TO MARKET RISK  As mutual funds investing primarily in common stocks,
                        Vanguard Balanced Index Fund and the Portfolios of
                        Vanguard Index Trust and Vanguard International Equity
                        Index Fund 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 +10.7% for all 10-year
                        periods from 1926 to 1995. Average return may not be
                        useful for forecasting future returns in any particular
                        period, as stock returns are quite volatile from year to
                        year.
  ------------------------------------------------------------------------------
 
INDEX TRUST
THE EXTENDED MARKET,
TOTAL STOCK MARKET
AND SMALL
CAPITALIZATION STOCK
PORTFOLIOS MAY EXHIBIT
GREATER VOLATILITY      Historically, medium- and small-capitalization stocks
                        have been more volatile in price than the
                        larger-capitalization stocks included in the S&P 500
                        Index. Among the reasons for the greater price
                        volatility of these securities are the less certain
                        growth prospects of smaller firms, the lower degree of
                        liquidity in the markets for such stocks, and the
                        greater sensitivity of medium- and small-size companies
                        to changing economic conditions. Besides exhibiting
                        greater volatility, medium- and small-size company
                        stocks may, to a degree, fluctuate independently of
                        larger company stocks. Medium- and small-size company
                        stocks may decline in price as large company stocks
                        rise, or rise in price as large company stocks decline.
                        Medium- and small-size company stocks constitute the
                        investments of the Extended Market Portfolio while the
                        Small Capitalization Stock Portfolio is composed
                        primarily of small-size company stocks. Investors in the
                        Portfolios should therefore expect that the Extended
                        Market and Small Capitalization Stock Portfolios will be
                        more volatile than, and may fluctuate independently of,
                        the 500 Portfolio.
 
                        Similarly, medium- and small-size company stocks
                        constituted approximately 30% of the net assets of the
                        Total Stock Market Portfolio on December 31, 1995.
                        Investors in the Portfolio should therefore anticipate
                        somewhat greater price volatility in the Total Stock
                        Market Portfolio relative to the 500 Portfolio.
 
                                       24
<PAGE>   26
 
THE VALUE AND
GROWTH PORTFOLIOS
MAY FLUCTUATE
INDEPENDENTLY           Stocks that emphasize particular investment
                        characteristics, such as "value" and "growth," may
                        fluctuate divergently from the broad market as
                        represented by the S&P 500 Index, and may also
                        demonstrate greater volatility over short or extended
                        periods relative to the broad market.
 
                        The S&P/BARRA Value Index maintains a lower
                        price-to-book ratio and historically has had a higher
                        yield than the S&P 500 Index, while the S&P/BARRA Growth
                        Index maintains a higher price-to-book and historically
                        has had a lower yield than the S&P 500 Index. Because of
                        these investment characteristics, the S&P/BARRA Value
                        Index has exhibited somewhat less short-term volatility
                        than the S&P 500 Index, while the S&P/BARRA Growth Index
                        has displayed somewhat greater short-term volatility
                        than the S&P 500 Index from 1975 through 1995. However,
                        as stated above, both Indexes may be more volatile than
                        the S&P 500 Index over short or extended periods. The
                        Indexes have been in existence since May, 1992.
                        Historical performance data was generated by BARRA by
                        constructing the S&P/BARRA Value and Growth Indexes from
                        actual S&P 500 Index holdings.
  ------------------------------------------------------------------------------
 
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 +14.2% for all 10-year periods from 1970-1995,
                        and the MSCI-Pacific Index has provided annual total
                        returns, averaging +17.8% during the same periods. By
                        comparison, the average annual total return of U.S.
                        stocks during this same period was +13.1% (as measured
                        by the Standard & Poor's 500 Composite Stock Price
                        Index). Note, however, that the period from 1970 to 1995
                        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 81% of the MSCI-Pacific (Free) Index as of
                        December 31, 1995, 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 13% of the MSCI-Europe Index,
                        respectively, as of December 31, 1995. 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.
 
                                       25
<PAGE>   27
 
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 1989-1995,
                        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
                        1989-1995, the average positive monthly return of the
                        Morgan Stanley Capital International Emerging Markets
                        Free Index, a widely quoted emerging market benchmark,
                        was +5.5%; while the average negative monthly return was
                        -4.9%.
 
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 judgement from a foreign
                        court;
 
                                       26
<PAGE>   28
 
                        political instability which could affect U.S. investment
                        in foreign countries; and potential restriction on the
                        flow of international capital.
  ------------------------------------------------------------------------------
 
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.
 
                                       27
<PAGE>   29
 
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 18), 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.
 
                        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, 1995, 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..............................  Aa1
</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 18) will increase credit risk
                        somewhat, as short-term investment grade corporate bonds
                        are substituted for U.S. Treasury bonds and
 
                                       28
<PAGE>   30
 
                        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 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.
  ------------------------------------------------------------------------------
 
                                       29
<PAGE>   31
 
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
                        18. 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 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 24.
 
                        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.
  ------------------------------------------------------------------------------
 
                                       30
<PAGE>   32
 
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.
 
                        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.
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                                       31
<PAGE>   33
 
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 (51% in the
                        Pacific Portfolio and 49% in the European Portfolio as
                        of December 31, 1995), a portfolio approximating the
                        investment characteristics of 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.
                        --------------------------------------------------------
 
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 Portfolio 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 18.
 
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
 
                                       32
<PAGE>   34
 
                        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.
 
                        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, 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.
  ------------------------------------------------------------------------------
 
                                       33
<PAGE>   35
 
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
                        6,900 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.
 
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
                        5,300 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 $50 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.
 
                                       34
<PAGE>   36
 
BONDS ARE SELECTED
USING A STRATIFIED
SAMPLING TECHNIQUE      The large number of issues in the Index makes it
                        impractical for the Fund to hold all of the individual
                        issues which comprise the Index. Instead, the Fund will
                        attempt to replicate the investment performance of the
                        Lehman Brothers Index by holding a representative sample
                        of the securities in the Index. In choosing a
                        representative sample of bond investments from the
                        Lehman Brothers Index, the Fund utilizes a "stratified
                        sampling" technique, which means that, the Fund will
                        select one or two individual bond issues to represent
                        entire "classes" or types of fixed-income investments in
                        the Index.
 
                        At the broadest level, the Fund will seek to hold
                        securities reflecting the three major classes of
                        fixed-income investments in the Lehman Brothers
                        Index -- U.S. Treasury and Government agency securities,
                        corporate debt obligations, and mortgage-backed
                        securities. For example, if corporate debt obligations
                        represent 25% of the Index, then 25% of the Fund's bond
                        holdings will also be invested in such securities. As
                        the Fund's assets grow, these classes of investments
                        will be further delineated along the lines of sector,
                        term to maturity, coupon, and credit rating. For
                        example, within the corporate debt class, all long-term,
                        low coupon AA-rated utility bonds might be represented
                        in the Fund by one or two individual utility securities,
                        which would result in less diversification and greater
                        security specific risk in the Fund compared to the
                        Index.
 
                        The Lehman Brothers Index is a trademark of Lehman
                        Brothers, Inc. Inclusion of a security in the Index in
                        no way implies an opinion by Lehman Brothers, Inc. as to
                        the attractiveness or appropriateness of a security as
                        an investment. Lehman Brothers, Inc. is neither a
                        sponsor of nor in any way affiliated with the Fund.
 
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.
  ------------------------------------------------------------------------------
 
                                       35
<PAGE>   37
 
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, 1995,
                        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 44% 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, 1995, the five largest companies in the
                        Index were: General Electric (2.6%), American Telephone
                        and Telegraph (2.2%), Exxon Corporation (2.2%), Coca-
                        Cola (2.1%), and Merck & Co. (1.8%). The largest
                        industry categories were: telephone companies (8.5%),
                        banks (6.4%), pharmaceutical companies (6.3%),
                        international oil companies (6.0%) and medical supplies
                        (4.2%).
 
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 5,000 stocks of medium- and small-capitalization
                        companies are included in the Wilshire 4500 Index.
 
                        The Extended Market Portfolio will be unable to hold all
                        of the more than 5,000 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
                        6,000 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 900 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
 
                                       36
<PAGE>   38
 
                        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 1,400 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, 1995, the average stock
                        market capitalization of the Russell 2000 was $360
                        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 34,
                        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 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
 
                                       37
<PAGE>   39
 
                        "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, 1995, after the semi-annual
                        reconstitution of the indexes, the S&P/BARRA Value Index
                        consisted of 315 common stocks in the S&P 500 Index,
                        while the S&P/BARRA Growth Index consisted of the
                        remaining 185. 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, 1995, the five largest companies in the
                        S&P/BARRA Value Index were Exxon Corp., Royal Dutch
                        Petroleum Co., IBM, Mobil, and Bell South Corp., the
                        five largest companies in the S&P/BARRA Growth Index
                        were General Electric Co., American Telephone &
                        Telegraph, Coca Cola Co., Merck & Co., Inc. and Phillip
                        Morris Cos., Inc.
 
                        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.
 
                                       38
<PAGE>   40
 
                        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
AND PACIFIC PORTFOLIO

THE PORTFOLIOS INVEST
IN INTERNATIONAL
COMMON STOCKS USING
SAMPLING TECHNIQUES
("PORTFOLIO
OPTIMIZATION")          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. 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) is weighted
                        according to its market value as a percentage of the
                        total market value of all stocks in the 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 the Morgan Stanley Capital International
                        believes the stock to be an attractive investment.
 
                        The 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 400 or more of
                        the securities in its respective Index, which will be
                        selected utilizing the statistical technique, "portfolio
                        optimization." (See page 34 for a general explanation of
                        "portfolio optimization".)
 
                        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.
  ------------------------------------------------------------------------------
 
                                       39
<PAGE>   41
 
EMERGING MARKETS
PORTFOLIO

THE PORTFOLIO INVESTS
IN INTERNATIONAL
COMMON STOCKS USING
SAMPLING TECHNIQUES
("PORTFOLIO
OPTIMIZATION")          The MSCI -- Select Emerging Markets Free Index consists
                        of approximately 500 equity securities from emerging
                        market countries in Asia, Latin America, Africa and
                        Europe. The stocks included in the Index are chosen on a
                        statistical basis. The companies based in Hong Kong and
                        Singapore are included in the Index to provide
                        participation in more liquid emerging markets; their
                        combined weight is limited to 20% of the Index. Each
                        stock within Hong Kong and Singapore will be weighted
                        according to its market value as a percentage of the
                        total market value of all of the Hong Kong and Singapore
                        stocks included in the index. (A stock's market value
                        equals the number of shares outstanding times the most
                        recent price of the security). The remaining portion of
                        the Index will be comprised of common stocks from 10
                        other emerging market countries -- Indonesia, Malaysia,
                        the Philippines, Thailand, Argentina, Brazil, Mexico,
                        Greece, Portugal and Turkey. Each stock in these
                        countries will be weighted according to its market value
                        as a percentage of the total market value of the
                        companies in the 10 countries multiplied by the
                        percentage of the index that these countries represent.
                        From time to time, additional emerging markets will be
                        analyzed for inclusion in the Index, based on liquidity
                        and tradeability. The inclusion of a country or stock in
                        the Index in no way implies that the country or stock is
                        an attractive investment.
 
                        The Portfolio will be unable to hold all of the issues
                        that comprise its Index, because of the transaction
                        costs involved and the illiquidity of many of the
                        securities. Instead, the Portfolio will attempt to hold
                        a representative sample of approximately 400 or more of
                        the securities in its Index by selecting stocks
                        utilizing the statistical technique, "portfolio
                        optimization." (See page 34 for a general explanation of
                        "portfolio optimization".)
 
                        Due to the use of this sampling or "portfolio
                        optimization" technique, the Portfolio is not expected
                        to track its benchmark with the same degree of accuracy
                        as large capitalization domestic index funds. Over time,
                        the correlation between the performance of the Portfolio
                        and the Index is expected to be greater than 0.95. A
                        correlation of 0.95 or higher is expected to be achieved
                        when the Portfolio exceeds $100 million in assets.
 
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
 
                                       40
<PAGE>   42
 
                        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. Both
                        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 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 stock and bond (interest rate)
                        futures contracts, options, warrants, convertible
                        securities and swap agreements to a limited extent.
                        Specifically, the Fund 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. Additionally, 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
 
                                       41
<PAGE>   43
 
                        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 are
                        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.
 
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 its 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
 
                                       42
<PAGE>   44
 
                        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 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 either Index.
 
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 Portfolios will
                        minimize this risk by entering into agreements that mark
                        to market no less frequently than quarterly. However,
                        the Portfolios' daily share price will take into effect
                        the daily price movement of any swap agreement entered
                        into by the Portfolios. Swap agreements also bear the
                        risk that the Portfolios will not be able to meet its
                        obligation to the counterparty. This risk will be
                        mitigated by investing the Portfolios 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.
 
                                       43
<PAGE>   45
 
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;
 
                        (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 will not:
 
                        (a)  invest more than 5% of its assets in the securities
                             of any single issuer except obligations of the
                             United States Government;
 
                        (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.
 
                        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; and
 
                        (b)  with respect to 75% of its assets, 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.
- --------------------------------------------------------------------------------
 
                                       44
<PAGE>   46
 
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 $190 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 1995, the average expense
                        ratio (annual costs including advisory fees divided by
                        total net assets) for the Vanguard funds amounted to
                        approximately .31% compared to an average of 1.11% for
                        the mutual fund industry (data provided by Lipper
                        Analytical Services).
 
                        The Officers of the Funds manage its day to day
                        operations and are responsible to the Funds Board of
                        Directors (Trustees). The Directors (Trustees) set broad
                        policies for the Funds and choose its 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 Funds 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 it share of the
                        Group's distribution costs.
- --------------------------------------------------------------------------------
 
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 $66 billion as of December 31, 1995. 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.
 
                                       45
<PAGE>   47
 
                        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 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,
                        1995 were $33 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 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
 
                                       46
<PAGE>   48
 
                        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 you have 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
                        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
 
                                       47
<PAGE>   49
 
                        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 gain 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 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.
 
                                       48
<PAGE>   50
 
                        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          The share price or "net asset value" per share of each
                        Portfolio is determined by dividing the total market
                        value of the Portfolio's investments and other assets,
                        less any liabilities, by the number of outstanding
                        shares of the Portfolio. Net asset value per share is
                        determined once daily at the close of regular trading on
                        the New York Stock Exchange (generally 4:00 p.m. Eastern
                        time).
 
                        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 not readily available are valued
                        at the mean of the bid and ask prices. Temporary cash
                        investments are valued at amortized cost which
                        approximates market value. 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.
- --------------------------------------------------------------------------------
 
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 is offering shares of three
                        series.
 
                        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
 
                                       49
<PAGE>   51
 
                        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.
- --------------------------------------------------------------------------------
 
                                       50
<PAGE>   52
 
                               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 assistance 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.
 
                                       51
<PAGE>   53
 
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...........      .5%         None
                          Small Capitalization Stock
                             Portfolio........................       1%         None
                          Value Portfolio.....................    None          None
                          Growth Portfolio....................    None          None
                        Vanguard International Equity Index Fund
                          European Portfolio..................       1%         None
                          Pacific Portfolio...................       1%         None
                          Emerging Markets Portfolio..........       2%            1%
                        Vanguard Total International
                          Portfolio...........................       1%         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 53 for the                  write your account number
                          appropriate number and mail          on your check, and using
                          to:                                  the return envelope pro-
                                                               vided, mail to the address
                          VANGUARD FINANCIAL CENTER            indicated on the
                          P.O. BOX 2600                        Invest-by-Mail Form. See
                          VALLEY FORGE, PA 19482               page 53 for the ap-
                                                               propriate Portfolio number.
</TABLE>
 
                                       52
<PAGE>   54
 
<TABLE>
<S>                       <C>                                  <C>
For express or            VANGUARD FINANCIAL CENTER            All written requests should
registered mail,          455 DEVON PARK DRIVE                 be mailed to one of the
send to:                  WAYNE, PA 19087                      addresses indicated for new
                                                               accounts. Do not send
                                                               registered or express 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
                          ----------------------------------------------------------------
</TABLE>
 
<TABLE>
<S>                       <C>
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.
 
                                       53
<PAGE>   55
 
                        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 or yearly) 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 three 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
 
                                       54
<PAGE>   56
 
                        value of your investment will be the same after the
                        capital gain distribution -- the amount of the capital
                        gain distribution will offset 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. 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 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                If you would prefer to 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.
                        If you elect to do so, you may also receive a paper copy
                        of the prospectus, by calling 1-800-662-7447.
- --------------------------------------------------------------------------------
 
                                       55
<PAGE>   57
 
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 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 the Extended
                        Market and Small Capitalization Stock Portfolios are
                        also subject to a 1% portfolio transaction fee, shares
                        of the Total Stock Market Portfolio are subject to a
                        0.25% portfolio transaction fee. Shares of Vanguard
                        International Equity Index Fund-Pacific Portfolio and
                        European Portfolio and Vanguard Total International
                        Portfolio are subject to a 1% transaction fee while
                        shares of the Emerging Markets Portfolio are subject to
                        a 2% 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.)
- --------------------------------------------------------------------------------
 
                                       56
<PAGE>   58
 
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.
 
                                       57
<PAGE>   59
 
                        5. Other supporting legal documentation that might be
                           required, in the case of estates, corporations,
                           trusts, and certain other accounts.
                        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 (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, by Vanguard
                        Online 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
 
                                       58
<PAGE>   60
 
                        Registration Form. We will send you a confirmation of
                        your Fund Express service; please wait three 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 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 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.
                        --------------------------------------------------------
 
                                       59
<PAGE>   61
 
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 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 exchange. 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 VANGUARD BALANCED INDEX FUND, VANGUARD INDEX
                        TRUST, 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
 
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<PAGE>   62
 
                        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.)
                        --------------------------------------------------------
 
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 or Vanguard/PRIMECAP 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.
- --------------------------------------------------------------------------------
 
                                       61
<PAGE>   63
 
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. If Vanguard
                        fails to follow reasonable security procedures, it may
                        be liable for 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, 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
 
                                       62
<PAGE>   64
 
                        Cost Statement along with their Portfolio Summary
                        Statement. Please call our Client Services Department
                        (1-800-662-2739) for information.
 
                        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. 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).
- --------------------------------------------------------------------------------
 
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<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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