VANGUARD INDEX TRUST
485BPOS, EX-99.BO, 2000-10-16
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                                 VANGUARD FUNDS

                               MULTIPLE CLASS PLAN

I.       INTRODUCTION
         ------------

     This Multiple Class Plan (the "Plan")  describes  four separate  classes of
shares that may be offered by investment  company  members of The Vanguard Group
(collectively  the  "Funds,"  individually  a  "Fund").  The Plan  explains  the
separate  arrangements for each class, how expenses are allocated to each class,
and the conversion  features of each class.  Each Fund may offer any one or more
of the specified classes.

     The Plan has been approved by the Board of Directors of The Vanguard  Group
("Vanguard").  In addition, the Plan has been adopted by a majority of the Board
of Trustees  of each Fund,  including  a majority  of the  Trustees  who are not
interested  persons of each Fund. The classes of shares offered by each Fund are
designated  in Schedule A hereto,  as such  Schedule may be amended from time to
time.

II.      SHARE CLASSES
         -------------

     A Fund may offer any one or more of the following share classes:

                                 Investor Shares

                                 Admiral Shares

                              Institutional Shares

                                  VIPER Shares

If a Fund has not  previously  issued  separate  classes of  shares,  all of its
currently  outstanding  shares will be designated as Investor Shares.  Currently
outstanding  shares of other Funds will  continue to be  designated  as Investor
Shares or Institutional Shares, as appropriate.

III.     DISTRIBUTION AND ELIGIBILITY
         ----------------------------

     Distribution  arrangements  will  be the  same  for all  classes,  although
eligibility  requirements  for purchasing  shares of each class will differ,  as
follows:

         A.       INVESTOR SHARES

               Investor  Shares  will  be  available  to  investors  who are not
          permitted  to  purchase  other  classes  of  shares,  subject  to  the
          eligibility  requirements  specified  in  Schedule  B hereto,  as such
          Schedule  may be amended  from time to time.  It is expected  that the
          minimum  investment  amount for Investor Shares will be  substantially
          lower  than the  amount  required  for any other  class of the  Fund's
          shares.

<PAGE>

         B.       ADMIRAL SHARES

                  Admiral  Shares will be available  to  investors  who meet the
         eligibility  requirements  specified  in  Schedule  B  hereto,  as such
         Schedule  may  be  amended  from  time  to  time.   These   eligibility
         requirements may take into account:  (i) the amount of an investment in
         the  Fund;  (ii)  the  length  of time  that a Fund  account  has  been
         maintained;  and (iii) whether the investor has  registered for on-line
         access to the Fund account through Vanguard's web site.

         C.       INSTITUTIONAL SHARES

                  Institutional  Shares will be available to investors  who meet
         the eligibility  requirements  specified in Schedule B hereto,  as such
         Schedule  may be amended  from time to time.  It is  expected  that the
         minimum   investment   amount   for   Institutional   Shares   will  be
         substantially  higher than the amount  required  for any other class of
         the Fund's shares.

         D.       VIPER SHARES

                  VIPER Shares will be  available to investors  that are (or who
         purchase through)  Authorized DTC  Participants,  and who pay for their
         VIPER shares by  depositing a prescribed  basket of  securities  rather
         than paying cash.  An Authorized  DTC  Participant  is an  institution,
         usually a broker-dealer,  that is a participant in the Depository Trust
         Company  (DTC) and that has executed a Participant  Agreement  with the
         Fund's distributor.

IV.      SERVICE ARRANGEMENTS
         --------------------

     All share classes will receive a range of services  provided by Vanguard on
a per account  basis.  These  "account-based"  services may include  transaction
processing  and  shareholder  recordkeeping,  as well as the  mailing of updated
prospectuses,  shareholder  reports,  tax statements,  confirmation  statements,
quarterly  portfolio  summaries,  and  other  items.  It is  expected  that  the
aggregate  amount of  account-based  services  provided to Investor  Shares will
materially  exceed the amount of such services  provided to any other class, due
to the existence of many more accounts holding  Investor Shares.  In addition to
this  difference in the volume of services  provided,  arrangements  will differ
among the classes as follows:

         A.       INVESTOR SHARES

                  Investor  Shares will  receive the most basic level of service
         from Vanguard.  In general,  Investor Shares will be serviced through a
         pool of Vanguard client service  representatives.  Investor Shares held
         through an employee  benefit plan may receive VISTA  recordkeeping  and
         participant education services from Vanguard.

         B.       ADMIRAL SHARES

               Admiral  Shares  will  receive  a higher  level of  service  from
          Vanguard  as  compared  to Investor  Shares.  Special  client  service
          representatives will be assigned

                                        2

<PAGE>

          to service  Admiral  Shares,  and  holders of such shares from time to
          time may receive special mailings from Vanguard and unique  additional
          services.

               Admiral Shares are not eligible to receive VISTA recordkeeping or
          participant education services.

         C.       INSTITUTIONAL SHARES

               Institutional  Shares will  receive the highest  level of service
          from Vanguard as compared to any other share  classes.  Special client
          service  representatives  will be  assigned  to service  Institutional
          Shares,  and most  holders of such shares  periodically  will  receive
          special  updates  from  Vanguard's   investment   staff.   Holders  of
          Institutional  Shares may  receive  unique  additional  services  from
          Vanguard,  and  generally  will be permitted to transact with Vanguard
          through the National Securities Clearing Corporation's FundSERV system
          and other special servicing platforms for institutional investors.

               Institutional  Shares generally are not eligible to receive VISTA
          recordkeeping or participant education services.

         D.       VIPER SHARES

               The Fund will maintain only one  shareholder  of record for VIPER
          Shares--DTC or its nominee.  Special  client  service  representatives
          will be  assigned to the DTC  account,  and all  transactions  on this
          account will be handled electronically.  Due to the nature and purpose
          of the DTC account,  VIPER Shares will not receive any special updates
          from Vanguard's investment staff.

               VIPER Shares are not eligible to receive VISTA  recordkeeping  or
          participant education services.

V.       CONVERSION FEATURES
         -------------------

         A.       VOLUNTARY CONVERSIONS

                           1. CONVERSION INTO INVESTOR  SHARES.  An investor may
                  convert Admiral Shares or  Institutional  Shares into Investor
                  Shares,  provided that  following the conversion the investor:
                  (i) meets the then  applicable  eligibility  requirements  for
                  Investor Shares;  and (ii) receives  services  consistent with
                  Investor  Shares.  Any  such  conversion  will  occur  at  the
                  respective   net  asset  values  of  the  share  classes  next
                  calculated after Vanguard's  receipt of the investor's request
                  in good order.

                           2. CONVERSION  INTO ADMIRAL  SHARES.  An investor may
                  convert Investor Shares or  Institutional  Shares into Admiral
                  Shares (if available),  provided that following the conversion
                  the  investor:  (i)  meets  the  then  applicable  eligibility
                  requirements  for Admiral Shares;  and (ii) receives

                                        3

<PAGE>

                    services consistent with Admiral Shares. Any such conversion
                    will occur at the  respective  net asset values of the share
                    classes  next  calculated  after  Vanguard's  receipt of the
                    investor's request in good order.

                         3. CONVERSION INTO  INSTITUTIONAL  SHARES.  An investor
                    may  convert   Investor   Shares  or  Admiral   Shares  into
                    Institutional Shares (if available), provided that following
                    the conversion the investor:  (i) meets the then  applicable
                    eligibility  requirements for Institutional Shares; and (ii)
                    receives services consistent with Institutional  Shares. Any
                    such  conversion  will  occur at the  respective  net  asset
                    values of the share classes next calculated after Vanguard's
                    receipt of the investor's request in good order.

                         4.  CONVERSION  INTO  VIPER  SHARES.  An  investor  may
                    convert  Investor Shares,  Admiral Shares,  or Institutional
                    Shares into VIPER Shares (if available),  provided that: (i)
                    the shares to be converted  are not held through an employee
                    benefit  plan;  and  (ii)  following  the  conversion,   the
                    investor will hold VIPER Shares through a brokerage account.
                    Any such  conversion  will occur at the respective net asset
                    values of the share classes next calculated after Vanguard's
                    receipt of the investor's request in good order. Vanguard or
                    the  Fund  may  charge  an  administrative  fee  to  process
                    conversion transactions.

         B.       INVOLUNTARY CONVERSIONS AND CASH OUTS

                         1. CASH OUTS.  If an investor in any class of shares no
                    longer meets the eligibility  requirements  for such shares,
                    the  Fund  may cash  out the  investor's  remaining  account
                    balance.  Any  such  cash out will be  preceded  by  written
                    notice to the  investor  and will be  subject  to the Fund's
                    normal redemption fees, if any.

                         2.  CONVERSION  OF ADMIRAL  SHARES.  If an  investor no
                    longer  meets  the  eligibility   requirements  for  Admiral
                    Shares,  the Fund may convert the investor's  Admiral Shares
                    into Investor  Shares.  Any such conversion will be preceded
                    by  written  notice to the  investor,  and will occur at the
                    respective net asset values of the share classes without the
                    imposition of any sales load, fee, or other charge.

                         3. CONVERSION OF INSTITUTIONAL  SHARES.  If an investor
                    no   longer   meets   the   eligibility   requirements   for
                    Institutional  Shares,  the Fund may convert the  investor's
                    Institutional  Shares into Admiral  Shares (or into Investor
                    Shares  if  the  investor  does  not  meet  the  eligibility
                    requirements for Admiral  Shares).  Any such conversion will
                    be  preceded  by written  notice to the  investor,  and will
                    occur  at the  respective  net  asset  values  of the  share
                    classes  without the  imposition of any sales load,  fee, or
                    other charge.

                                        4

<PAGE>

VI.      EXPENSE ALLOCATION AMONG CLASSES
         --------------------------------

         A.       BACKGROUND

               Vanguard is a  jointly-owned  subsidiary  of the Funds.  Vanguard
          provides  the  Funds,  on an  at-cost  basis,  virtually  all of their
          corporate  management,   administrative  and  distribution   services.
          Vanguard also may provide  investment  advisory services on an at-cost
          basis to the Funds.  Vanguard was established and operates pursuant to
          a  Funds'  Service   Agreement  between  itself  and  the  Funds  (the
          "Agreement"),  and pursuant to certain exemptive orders granted by the
          U.S.   Securities  and  Exchange  Commission   ("Exemptive   Orders").
          Vanguard's  direct  and  indirect  expenses  of  providing   corporate
          management,  administrative and distribution services to the Funds are
          allocated among such funds in accordance with methods specified in the
          Agreement.

         B.       CLASS SPECIFIC EXPENSES

                    1. Expenses for Account-Based Services.  Expenses associated
               with Vanguard's  provision of account-based  services to the Fund
               will be  allocated  among the share  classes  on the basis of the
               amount incurred by each such class as follows:

                                    (a) ACCOUNT MAINTENANCE  EXPENSES.  Expenses
                           associated with the maintenance of investor  accounts
                           will be  proportionately  allocated  among the Fund's
                           share classes based upon a monthly  determination  of
                           the costs to service  each  class of shares.  Factors
                           considered   in  this   determination   are  (i)  the
                           percentage of total shareholder  accounts represented
                           by each class;  (ii) the  percentage of total account
                           transactions  performed  by Vanguard  for each class;
                           and (iii) the  percentage of new accounts  opened for
                           each class.

                                    (b)    EXPENSES    OF   SPECIAL    SERVICING
                           ARRANGEMENTS.   Expenses   relating  to  any  special
                           servicing  arrangements  for a specific class will be
                           allocated entirely to that class.

                                    (c)   LITERATURE   PRODUCTION   AND  MAILING
                           EXPENSES.   Expenses   associated  with   shareholder
                           reports, proxy materials and other literature will be
                           allocated  among the Fund's share  classes based upon
                           the number of such items produced and mailed for each
                           class.

                    2. OTHER CLASS SPECIFIC  EXPENSES.  Expenses for the primary
               benefit of a  particular  share class will be  allocated  to that
               share  class.   Such  expenses   would  include  any  legal  fees
               attributable to a particular class.

         C.       FUND-WIDE EXPENSES

                    1. MARKETING AND DISTRIBUTION EXPENSES.  Expenses associated
               with  Vanguard's  marketing and  distribution  activities will be
               allocated among


                                        5

<PAGE>

               the Funds and  their  separate  share  classes  according  to the
               "Vanguard  Modified Formula," with each share class treated as if
               it were a separate Fund. The Vanguard Modified Formula,  which is
               set forth in the  Agreement  and in certain of the SEC  Exemptive
               Orders, has been deemed an appropriate  allocation methodology by
               each Fund's Board of Trustees under  paragraph  (c)(1)(v) of Rule
               18f-3 under the Investment Company Act of 1940.

                    2.  ASSET  MANAGEMENT  EXPENSES.  Expenses  associated  with
               management  of a  Fund's  assets  (including  all  advisory,  tax
               preparation  and custody fees) will be allocated among the Fund's
               share classes on the basis of their relative net assets.

                    3.  OTHER  FUND  EXPENSES.   Any  other  Fund  expenses  not
               described  above will be allocated among the share classes on the
               basis of their relative net assets.

VII.     ALLOCATION OF INCOME, GAINS AND LOSSES
         --------------------------------------

         Income,  gains and losses  will be  allocated  among the  Fund's  share
classes on the basis of their relative net assets. As a result of differences in
allocated expenses, it is expected that the net income of, and dividends payable
to, each class of shares will vary.  Dividends  and  distributions  paid to each
class of shares will be  calculated  in the same manner,  on the same day and at
the same time.

VIII.    VOTING AND OTHER RIGHTS
         -----------------------

         Each share class will have:  (i) exclusive  voting rights on any matter
submitted to  shareholders  that relates  solely to its service or  distribution
arrangements;  and (ii)  separate  voting  rights  on any  matter  submitted  to
shareholders  in which the  interests of one class differ from the  interests of
the other class;  and (iii) in all other  respects the same rights,  obligations
and privileges as each other, except as described in the Plan.

II.      AMENDMENTS
         ----------

         All material  amendments  to the Plan must be approved by a majority of
the Board of Trustees of each Fund, including a majority of the Trustees who are
not interested  persons of the Fund. In addition,  any material amendment to the
Plan must be approved by the Board of Directors of Vanguard.

                                        6

<PAGE>

                                   SCHEDULE A

                                       TO

                       VANGUARD FUNDS MULTIPLE CLASS PLAN

Note: This Schedule reflects multiple class arrangements  approved by the Boards
of  Directors/Trustees  of Vanguard  and the  Vanguard  Funds on July 21,  2000.
Classes not  previously in existence as of that date will be  implemented in the
normal course of business.

--------------------------------------------------------------------------------
VANGUARD FUND                                   SHARE CLASSES OFFERED
-----------------------------------------------------------------------------
Vanguard Admiral Funds

o   Money Market Treasury Fund                  Investor
o   Short-Term Treasury Fund                    Investor
o   Intermediate-Term Treasury Fund             Investor
o   Long-Term Treasury Fund                     Investor
o   Treasury Money Market Fund                  Investor

Vanguard Balanced Index Fund                    Investor, Admiral, Institutional

Vanguard Bond Index Funds

o   Short-Term Bond Index Fund                  Investor, Admiral
o   Intermediate-Term Bond Index Fund           Investor, Admiral
o   Long-Term Bond Index Fund                   Investor
o   Total Bond Market Index Fund                Investor, Admiral, Institutional

Vanguard California Tax-Exempt Funds
o   Tax-Exempt Money Market Fund                Investor
o   Insured Intermediate-Term Tax-Exempt Fund   Investor, Admiral
o   Insured Long-Term Tax-Exempt Fund           Investor, Admiral

Vanguard Convertible Securities Fund            Investor

Vanguard Explorer Fund                          Investor, Admiral

Vanguard Fenway Funds

o   Equity Income Fund                          Investor, Admiral
o   Growth Equity Fund                          Investor

Vanguard Fixed Income Securities Funds

o   Short-Term Treasury Fund                    Investor, Admiral
o   Short-Term Federal Fund                     Investor, Admiral
o   Short-Term Corporate Fund                   Investor, Admiral, Institutional
o   Intermediate-Term Treasury Fund             Investor, Admiral
o   Intermediate-Term Corporate Fund            Investor, Admiral
o   GNMA Fund                                   Investor, Admiral
o   Long-Term Treasury Fund                     Investor, Admiral
o   Long-Term Corporate Fund                    Investor, Admiral
o   High Yield Corporate Fund                   Investor, Admiral
o   Inflation-Protected Securities Fund         Investor

Vanguard Florida Insured Tax-Exempt Fund        Investor

                                        7

<PAGE>

<TABLE>
<CAPTION>

--------------------------------------------------------------------------------
VANGUARD FUND                                   SHARE CLASSES OFFERED
--------------------------------------------------------------------------------
<S>                                             <C>
Vanguard Horizon Funds
o   Aggressive Growth Fund                      Investor
o   Capital Opportunity Fund                    Investor, Admiral
o   Global Asset Allocation Fund                Investor
o   Global Equity Fund                          Investor

Vanguard Index Trust

o   500 Index Fund                              Investor, Admiral, VIPER
o   Extended Market Index Fund                  Investor, Admiral, Institutional, VIPER
o   Growth Index Fund                           Investor, Admiral, Institutional, VIPER
o   Mid-Cap Index Fund                          Investor, Institutional, VIPER
o   Small-Cap Growth Index Fund                 Investor, Institutional, VIPER
o   Small-Cap Index Fund                        Investor, Admiral, Institutional, VIPER
o   Small-Cap Value Index Fund                  Investor, Institutional, VIPER
o   Total Stock Market Index Fund               Investor, Admiral, Institutional, VIPER
o   Value Index Fund                            Investor, Admiral, Institutional, VIPER

Vanguard International Equity Index Funds

o   Emerging Markets Stock Index Fund           Investor, Admiral, Institutional
o   European Stock Index Fund                   Investor, Admiral, Institutional
o   Pacific Stock Index Fund                    Investor, Admiral, Institutional

Vanguard Malvern Funds

o   Asset Allocation Fund                       Investor, Admiral
o   U.S. Value Fund                             Investor

Vanguard Massachusetts Tax-Exempt Fund          Investor

Vanguard Money Market Reserves

o   Prime Money Market Fund                     Investor, Institutional
o   Federal Money Market Fund                   Investor

Vanguard Morgan Growth Fund                     Investor, Admiral

Vanguard Municipal Bond Funds

o   Tax-Exempt Money Market Fund                Investor
o   Short-Term Tax-Exempt Fund                  Investor, Admiral
o   Limited-Term Tax-Exempt Fund                Investor, Admiral
o   Intermediate-Term Tax-Exempt Fund           Investor, Admiral
o   Insured Long-Term Tax-Exempt Fund           Investor, Admiral
o   Long-Term Tax-Exempt Fund                   Investor, Admiral
o   High Yield Tax-Exempt Fund                  Investor, Admiral

</TABLE>

                                        8

<PAGE>

--------------------------------------------------------------------------------
VANGUARD FUND                                   SHARE CLASSES OFFERED
--------------------------------------------------------------------------------
Vanguard New Jersey Tax-Exempt Funds
o   Tax-Exempt Money Market Fund                Investor
o   Insured Long-Term Tax-Exempt Fund           Investor, Admiral

Vanguard New York Tax-Exempt Funds

o   Tax-Exempt Money Market Fund                Investor
o   Insured Long-Term Tax-Exempt Fund           Investor, Admiral

Vanguard Ohio Tax-Exempt Funds

o   Tax-Exempt Money Market Fund                Investor
o   Insured Long-Term Tax-Exempt Fund           Investor

Vanguard Pennsylvania Tax-Exempt Funds
o   Tax-Exempt Money Market  Fund               Investor
o   Insured Long-Term Tax-Exempt Fund           Investor, Admiral

Vanguard Preferred Stock Fund                   Investor

Vanguard PRIMECAP Fund                          Investor, Admiral

Vanguard Quantitative Funds

o   Growth and Income Fund                      Investor, Admiral

Vanguard Specialized Funds

o   Energy Fund                                 Investor
o   Gold and Precious Metals Fund               Investor
o   Health Care Fund                            Investor, Admiral
o   Utilities Income Fund                       Investor
o   REIT Index Fund                             Investor

Vanguard Tax-Managed Funds

o   Tax-Managed Balanced Fund                   Investor

o   Tax-Managed Capital Appreciation Fund       Investor, Admiral, Institutional
o   Tax-Managed Growth and Income Fund          Investor, Admiral, Institutional
o   Tax-Managed International Fund              Investor, Institutional
o   Tax-Managed Small-Cap Fund                  Investor, Institutional

                                        9

<PAGE>

--------------------------------------------------------------------------------
VANGUARD FUND                                        SHARE CLASSES OFFERED
--------------------------------------------------------------------------------
Vanguard Treasury Funds

o   Treasury Money Market Fund                  Investor

Vanguard Trustees' Equity Fund

o   International Value Fund                    Investor, Admiral

Vanguard Wellesley Income Fund                  Investor, Admiral

Vanguard Wellington Fund                        Investor, Admiral

Vanguard Whitehall Funds

o   Selected Value Fund                         Investor

Vanguard Windsor Funds

o   Windsor Fund                                Investor, Admiral
o   Windsor II                                  Investor, Admiral

Vanguard World Funds

o   U.S. Growth Fund                            Investor, Admiral
o   International Growth Fund                   Investor, Admiral
o   Calvert Social Index Fund                   Investor, Institutional

Vanguard Variable Insurance Funds

o   Balanced Portfolio                          Investor
o   Diversified Value Portfolio                 Investor
o   Equity Income Portfolio                     Investor
o   Equity Index Portfolio                      Investor
o   Growth Portfolio                            Investor
o   High-Grade Bond Portfolio                   Investor
o   High Yield Bond Portfolio                   Investor
o   International Portfolio                     Investor
o   Mid-Cap Index Portfolio                     Investor
o   Money Market Portfolio                      Investor
o   REIT Index Portfolio                        Investor
o   Short-Term Corporate Portfolio              Investor
o   Small Company Growth Portfolio              Investor

                                       10

<PAGE>

                                   SCHEDULE B

                                       TO

                       VANGUARD FUNDS MULTIPLE CLASS PLAN

Note:  This Schedule  reflects class  eligibility  requirements  approved by the
Boards of  Directors/Trustees  of Vanguard  and the  Vanguard  Funds on July 21,
2000. Classes not previously in existence as of that date will be implemented in
the normal course of business.

INVESTOR SHARES - ELIGIBILITY REQUIREMENTS
------------------------------------------
Investor Shares require a minimum initial investment and ongoing account balance
of  $3,000  ($1,000  for IRAs  and  UGMA  accounts),  subject  to the  following
exceptions:

o   Vanguard Admiral Funds-$50,000 minimum amount for Investor Shares

o   Vanguard Capital Opportunity Fund-$25,000 minimum amount for Investor Shares

o   Vanguard STAR Fund-$1,000 minimum amount for Investor Shares

o   Vanguard Tax-Managed Funds-$10,000 minimum amount for Investor Shares


ADMIRAL SHARES - ELIGIBILITY REQUIREMENTS
-----------------------------------------
Admiral Shares require a minimum initial  investment and ongoing account balance
of $250,000, subject to the following exceptions:

o    Tenure exception - The minimum amount for Admiral Shares is $150,000 if the
     investor has maintained an account in the  applicable  Fund for 3 years and
     $50,000 if the investor has  maintained an account in the  applicable  Fund
     for 10 years,  subject to administrative  policies developed by Vanguard to
     exclude  costly  accounts.  To take advantage of the tenure  exception,  an
     investor  must be  registered  for  on-line  access to their  Fund  account
     through vanguard.com.

o    Financial  intermediary  exception - Admiral  Shares are not  available  to
     financial  intermediaries  who would meet the  eligibility  requirements by
     aggregating  the  holdings  of  underlying  investors.  However,  financial
     intermediaries  may  purchase  Admiral  Shares on behalf of any  underlying
     investor whose investment individually meets the $250,000 minimum amount if
     they comply with Vanguard's procedures for identifying such accounts.

o    VISTA  exception - Admiral  Shares are not  available  to  participants  in
     employee  benefit  plans  that  utilize  Vanguard's  VISTA  system for plan
     recordkeeping.

o    403(b)(7) custodial account exception - Admiral Shares are not available to
     403(b)(7) custodial acccounts.

                                       11

<PAGE>

INSTITUTIONAL SHARES - ELIGIBILITY REQUIREMENTS
------------------------------------------------
Institutional  Shares require a minimum  initial  investment and ongoing account
balance of $10,000,000, subject to the following exceptions:

o    Vanguard  Short-Term  Corporate  Fund  -  $50,000,000  minimum  amount  for
     Institutional Shares

o    Financial  intermediary  exception - Institutional Shares are not available
     to financial  intermediaries who would meet the eligibility requirements by
     aggregating the holdings of underlying investors.

o    VISTA exception - Institutional Shares are not available to participants in
     employee  benefit  plans  that  utilize  Vanguard's  VISTA  system for plan
     recordkeeping.  However,  Vanguard  may  determine  to waive  this rule for
     investors  whose  aggregate  assets with the Vanguard Funds are expected to
     generate substantial economies in the servicing of their accounts.

VIPER SHARES - ELIGIBILITY REQUIREMENTS
---------------------------------------
The  eligibility  requirements  for VIPER Shares will be set forth in the Fund's
Registration  Statement. To be eligible to purchase VIPER Shares directly from a
Fund,  an  investor  must  be (or  must  purchase  through)  an  Authorized  DTC
Participant, as defined in Paragraph III.D of the Multiple Class Plan. Investors
purchasing  VIPER Shares from a Fund must  purchase a minimum  number of shares,
known as a Creation  Unit.  The number of VIPER  Shares in a Creation  Unit will
vary from Fund to Fund,  and will be set forth in the relevant  prospectus.  The
value of a Fund's Creation Unit will vary with the net asset value of the Fund's
VIPER  Shares,  but is  expected  to be several  million  dollars.  An  eligible
investor  generally  must  purchase a Creation  Unit by  depositing a prescribed
basket of securities with the Fund, rather than paying cash.

                                       12


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