[SHIP] [VANGUARD LOGO]


                                 April 22, 2005


Christian Sandoe, Esq.
Division of Investment Management
U.S. Securities and Exchange Commission                 VIA E-MAIL
450 Fifth Street, N.W., Fifth Floor
Washington, D.C. 20549

RE:      VANGUARD INDEX FUNDS (THE "TRUST"); FILE NO. 2-56846

Dear Mr. Sandoe:

     Thank you for your  comments of April 14, 2005  regarding  the Trust's 95th
Post-Effective  Amendment  to the  Registration  Statement  that  was  filed  on
February 28, 2005  pursuant to Rule 485(a).  The  following are our responses to
each of your comments.  Each prospectus page reference is to the Investor Shares
and Admiral Shares version of the Vanguard U.S. Stock Index Funds' prospectus.


COMMENT 1:     ADDITION OF MID-CAP  RISK TO VANGUARD  TOTAL STOCK  MARKET  INDEX
               FUND (PAGE 2)

Comment:       If the Vanguard  Total Stock Market Index Fund (the "Stock Fund")
               invests in mid-cap  stocks,  move mid-cap risk  disclosure to the
               Primary Risks section of the prospectus.

Response:      Item 2 of Form N-1A requires a summary of "the principal risks of
               investing  in the Fund,  including  the risks to which the Fund's
               portfolio as a whole is subject" (emphasis added).  This requires
               disclosure of the risks of a fund's overall portfolio,  not every
               risk  associated with each type of security held by the fund. The
               Commission's approach to risk disclosure is succinctly summarized
               in the 1998  release  adopting  sweeping  revisions  to Form N-1A
               (Investment  Company Act Release No. 23064 (March 13, 1998). Part
               II.A.3.b  of the  release  states  "disclosure  about  the  risks
               associated  with  each  type of  security  in which  the fund may
               invest  does  not  effectively  communicate  to  [investors]  the
               overall risks of investing in the fund. In the Commission's view,
               disclosing  the  risks  of each  possible  portfolio  investment,
               rather than the overall  risks of investing  in a fund,  does not
               help investors evaluate a particular fund or compare the risks of
               the fund with those of other funds."




Mr. Christian Sandoe
Aprill 22, 2005
Page 2 of 3


               Applying the Commission's position to the Stock Fund, we conclude
               that  disclosing  mid-cap  risk in Item 2 would  not  effectively
               communicate the overall risks of investing in the Stock Fund. The
               risk of investing in funds focused on mid- or small-cap stocks is
               that their returns can be more volatile than the returns of funds
               investing  in  large-cap  stocks.  This  risk,  however,  is  not
               significant  for the Stock Fund for two primary  reasons.  First,
               large-capitalization  stocks  constitute the preponderance of the
               Stock Fund's assets. Second, the Stock Fund's limited exposure to
               mid-and  small-cap  stocks is spread across the whole universe of
               domestic stocks.  The result of this  diversification is to limit
               sector-specific and stock-specific risk, including mid-cap risk.

               The  modest,  and broad,  exposure to mid- and  small-cap  stocks
               actually  served to reduce the  volatility  of  returns.  For the
               36-month  period ended March 31, 2005,  the Stock Fund had a beta
               of 1.00 versus the Dow Jones Wilshire 5000 Composite Index (i.e.,
               matched the volatility  exactly).  Relative to the S&P 500 Index,
               the Stock Fund's beta was 0.98%  (i.e.,  slightly  less  volatile
               than the large-cap-only S&P 500 Index).

               Highlighting  the  potential  volatility  of a  relatively  small
               portion of the Stock Fund's holdings in the Primary Risks section
               of the prospectus would be inappropriate, potentially misleading,
               and contrary to the intent of the Commission.

COMMENT 2:     INVESTMENT ADVISOR CLARIFICATION (PAGE 34)

Comment:       In the  Investment  Advisor  section  of the  prospectus,  better
               clarify  that  George  Sauter  oversees,  rather  than  does  the
               day-to-day management, of the Funds within the Trust.

Response:      We believe that the disclosure is clear as written. The paragraph
               describing  Mr.  Sauter  states  that he is  responsible  for the
               "oversight of  approximately  $530 billion  managed by Vanguard's
               Quantitative  Equity and Fixed Income Groups."  Furthermore,  the
               introduction  to the  "Plain  Talk  About  The  Funds'  Portfolio
               Managers"  clearly  states  that the  individuals  listed  in the
               highlighted  "Plain Talk" box are "primarily  responsible for the
               day-to-day  management of the Funds' portfolios." In light of our
               clear statements  about the roles of each  individual,  we do not
               believe that it is  necessary  to state that Mr.  Sauter does not
               have day-to-day management responsibilities for the Funds.

COMMENT 3:     REVISE BOARD REVIEW OF ADVISORY CONTRACTS
               (PAGE B-29 IN THE STATEMENT OF ADDITIONAL INFORMATION ("SAI")

Comment:       Add disclosure to the SAI that relates the factors  considered by
               each Fund's board in reviewing  investment advisory agreements to
               the particulars of each Fund,  pursuant to Item 12(b)(10) of Form
               N-1A.


Mr. Christian Sandoe
April 22, 2005
Page 3 of 3



Response:      Item 12(b)(10)  requires  funds to "discuss in reasonable  detail
               the material  factors and the  conclusions  with respect  thereto
               that formed the basis for the board of  directors  approving  the
               existing  investment  advisory  contract."  We have  revised  our
               existing  disclosure   regarding  board  approval  of  investment
               advisory agreements.

               We propose to revise the relevant SAI  disclosure as indicated in
               Appendix  A  to  this  letter.  Please  note  that  the  proposed
               disclosure  in Appendix A is subject to  editorial  revision  and
               completion.

COMMENT 4:     TANDY REQUIREMENTS

Comment:       The SEC is now requiring all registrants to provide at the end of
               response  letters  to  registration   statement   comments,   the
               following statements:


o Each Fund is responsible for the adequacy and accuracy of the disclosure in
the filing.

               o    Staff  comments or changes in response to staff  comments in
                    the  filings  reviewed  by the  staff do not  foreclose  the
                    Commission  from  taking  any  action  with  respect  to the
                    filing.

               o    Each Fund may not assert staff  comments as a defense in any
                    proceeding  initiated by the  Commission or any person under
                    the federal securities laws of the United States.

Response:      As required by the SEC, we will provide the foregoing
               acknowledgements.

                                    * * * * *

               As required by the SEC, the Funds acknowledge that:

               o    The Funds are  responsible  for the adequacy and accuracy of
                    the disclosure in the filing.

               o    Staff  comments or changes in response to staff  comments in
                    the  filings  reviewed  by the  staff do not  foreclose  the
                    Commission  from  taking  any  action  with  respect  to the
                    filing.

               o    The Funds may not assert staff  comments as a defense in any
                    proceeding  initiated by the  Commission or any person under
                    the federal securities laws of the United States.

     Please call me at (610) 669-5284 if you have any further questions.

                                   Sincerely,


                                Lisa L. B. Matson
                                Associate Counsel
                                The Vanguard Group, Inc.


Enclosure




                                   APPENDIX A


BOARD REVIEW OF INVESTMENT ADVISORY ARRANGEMENTS

Each Fund's board of trustees  oversees the Fund's management and performance on
a regular basis. In addition, the board considers annually whether each Fund and
its shareholders continue to benefit from the internalized  management structure
whereby the Fund receives investment management services at cost from Vanguard's
Quantitative Equity Group. Vanguard provides the board with monthly,  quarterly,
and annual analyses of the Quantitative Equity Group's performance. In addition,
Vanguard  provides the board with quarterly  self-evaluations  and certain other
information  the board  deems  important  to evaluate  the short- and  long-term
performance  of each  Fund's  internalized  management.  Each  Fund's  portfolio
managers  meet  with the  board  periodically  to  discuss  the  management  and
performance of the Fund.

     When considering whether to continue the internalized  management structure
of each Fund,  the board  examines  several  factors,  but does not identify any
particular  factor as  controlling  their  decision.  The board also reviews the
investment  performance  of each Fund compared with a peer group of funds and an
appropriate index.

     After  reviewing  and  considering  various  factors as they  relate to the
Funds,  the board  determines  whether it would be in the best  interests of the
respective   fund   shareholders   to  continue  the   internalized   management
arrangement.

     In its most recent review of each Fund's  advisory  arrangement,  the board
identified no single factor that  controlled the decision.  The primary  factors
underlying the board's  determination to renew each Fund's advisory arrangements
were as follows:

VANGUARD TOTAL STOCK MARKET INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

     The specific Fund  performance and advisory fee  information  considered by
the board included the following:




                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------
                                                                                                                    ADVISORY FEES
                                                                                                                  EXPRESSED AS AN
                                                           5 YEARS               10 YEARS                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
 INDEX FUND INVESTOR SHARES*          12.52%                -1.44%                 11.81%            0.19%        Less than 0.01%
 Average Multi-Cap Core Fund**        11.05                 -0.48                  10.91             1.36                   0.56
 Dow Jones Wilshire 5000 Index        12.62                 -1.42                  11.92              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.



- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance,  which is disclosed in the table  above.  The board  concluded
     that the Fund  outperformed  or performed  near the average  multi-cap core
     fund and its benchmark index over the short- and long-term.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

                                      B-30


- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  was to continue the investment  management  arrangement  with
     Vanguard.

VANGUARD 500 INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

     The specific Fund  performance and advisory fee  information  considered by
the board included the following:



                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------
                                                                                                                    ADVISORY FEES
                                                                                                                  EXPRESSED AS AN
                                                           5 YEARS               10 YEARS                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD 500 INDEX FUND
 INVESTOR SHARES*                     10.74%                -2.38%                 12.00%            0.18%        Less than 0.01%
 Average Large-Cap Core Fund**         7.79                 -4.05                   9.82             1.45                   0.61
 S&P 500 Index                        10.88                 -2.30                  12.07              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.


- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance,  which is disclosed in the table  above.  The board  concluded
     that the Fund  outperformed  the average  large-cap core fund and performed
     near its benchmark index over the short- and long-term.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  was to continue the investment  management  arrangement  with
     Vanguard.

VANGUARD EXTENDED MARKET INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

                                      B-31


     The specific Fund  performance and advisory fee  information  considered by
the board included the following:



                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------
                                                                                                                    ADVISORY FEES
                                                                                                                  EXPRESSED AS AN
                                                           5 YEARS               10 YEARS                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD EXTENDED MARKET INDEX FUND
 INVESTOR SHARES*                     18.71%                 1.37%                 12.16%            0.25%       Less than 0.005%
 Average Mid-Cap Core Fund**          15.52                  5.78                  14.01             1.54                   0.67
 Dow Jones Wilshire 4500 Index        18.57                  1.38                  11.97              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.



- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance,  which is disclosed in the table  above.  The board  concluded
     that  the  Fund  outperformed  the  average  mid-cap  core  fund  over  the
     short-term, and outperformed or performed near its benchmark index over the
     short- and long-term.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  was to continue the investment  management  arrangement  with
     Vanguard.

VANGUARD LARGE-CAP INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

     The specific Fund  performance and advisory fee  information  considered by
the board included the following:



                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------

                                                           5 YEARS               10 YEARS                           ADVISORY FEES
                                                         (or since              (or since                         EXPRESSED AS AN
                                                        inception)             inception)                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD LARGE-CAP INDEX FUND
 INVESTOR SHARES* (Inception date
 January 30, 2004)                     9.13%                   N/A                    N/A            0.20%                  0.01%
 Average Large-Cap Core Fund**         6.13                    N/A                    N/A            1.45                   0.61
 MSCI US Prime Market 750 Index        9.31                    N/A                    N/A             N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.


                                      B-32


- -    The board  considered the Fund's  investment  performance  since inception,
     which is disclosed in the preceding  table. The board concluded that during
     that time  period  the Fund  outperformed  or  performed  near the  average
     large-cap core fund and its benchmark index.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  was to continue the investment  management  arrangement  with
     Vanguard.

VANGUARD MID-CAP INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

     The specific Fund  performance and advisory fee  information  considered by
the board included the following:



                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------

                                                                                 10 YEARS                           ADVISORY FEES
                                                                                (or since                         EXPRESSED AS AN
                                                           5 YEARS             inception)                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD MID-CAP INDEX FUND
 INVESTOR SHARES* (Inception
 date May 21, 1998)                   20.35%                10.13%                 11.28%            0.22%       Less than 0.005%
 Average Mid-Cap Core Fund**          15.52                  5.78                   9.33             1.54                   0.67
 Spliced Mid Cap Index+               20.52                 10.00                  10.99              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.
+    The Spliced Index  reflects the  performance  of the Fund's  previous index
     through May 16, 2003, and of the current MSCI Index thereafter.


- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance,  which is disclosed in the table  above.  The board  concluded
     that for each time period the Fund  outperformed  the average  mid-cap core
     fund and performed near its benchmark index.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  was to continue the investment  management  arrangement  with
     Vanguard.

                                      B-33


VANGUARD SMALL-CAP INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

     The specific Fund  performance and advisory fee  information  considered by
the board included the following:



                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------
                                                                                                                    ADVISORY FEES
                                                                                                                  EXPRESSED AS AN
                                                           5 YEARS               10 YEARS                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD SMALL-CAP INDEX
 FUND INVESTOR SHARES*                19.90%                 6.98%                 12.28%            0.23%       Less than 0.005%
 Average Small-Cap Core
Fund**                                18.38                  9.57                  14.51             1.73                   0.71
 Spliced Small Cap
Index+                                20.01                  6.65                  11.56              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.
+    The Spliced Index  reflects the  performance  of the Fund's  previous index
     through May 16, 2003, and of the current MSCI Index thereafter.



- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance,  which is disclosed in the table  above.  The board  concluded
     that the Fund  outperformed  or performed  near the average  small-cap core
     fund and its benchmark index over the short-term.  The board noted that the
     Fund  underperformed  the average  small-cap core fund but outperformed its
     benchmark index over the long-term.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  was to continue the investment  management  arrangement  with
     Vanguard.

VANGUARD VALUE INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

                                      B-34


     The specific Fund  performance and advisory fee  information  considered by
the board included the following:



                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------
                                                                                                                    ADVISORY FEES
                                                                                                                  EXPRESSED AS AN
                                                           5 YEARS               10 YEARS                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD VALUE INDEX
 FUND INVESTOR SHARES*                15.29%                 2.43%                 12.16%            0.21%       Less than 0.005%
 Average Large-Cap Value
Fund**                                11.94                  1.68                  11.53             1.41                   0.58
 Spliced Value Index+                 15.44                  2.53                  12.27              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.
+    The Spliced Index  reflects the  performance  of the Fund's  previous index
     through May 16, 2003, and of the current MSCI Index thereafter.



- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance,  which is disclosed in the table  above.  The board  concluded
     that the Fund  outperformed the average  large-cap value fund and performed
     near its benchmark index over the short- and long-term.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  to was continue the investment  management  arrangement  with
     Vanguard.

VANGUARD SMALL-CAP VALUE INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

     The specific Fund  performance and advisory fee  information  considered by
the board included the following:




                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------

                                                                                 10 YEARS                           ADVISORY FEES
                                                                                (or since                         EXPRESSED AS AN
                                                           5 YEARS             inception)                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD SMALL-CAP VALUE
 INDEX FUND INVESTOR SHARES*
 (Inception date May 21, 1998)        23.55%                15.05%                  9.51%            0.23%                  0.01%
 Average Small-Cap Value Fund**       20.86                 16.25                  10.34             1.62                   0.78
 Spliced Small Cap Value Index+       23.72                 14.41                   8.85              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.
+    The Spliced Index  reflects the  performance  of the Fund's  previous index
     through May 16, 2003, and of the current MSCI Index thereafter.


                                      B-35


- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance, which is disclosed in the preceding table. The board concluded
     that the Fund  outperformed  or performed near the average  small-cap value
     fund and its benchmark index over the short-term.  The board noted that the
     Fund underperformed the average small-cap value fund over the long-term but
     outperformed its benchmark index during that time period

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  was to continue the investment  management  arrangement  with
     Vanguard.

VANGUARD GROWTH INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

     The specific Fund  performance and advisory fee  information  considered by
the board included the following:




                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------
                                                                                                                    ADVISORY FEES
                                                                                                                  EXPRESSED AS AN
                                                           5 YEARS               10 YEARS                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD GROWTH INDEX
 FUND INVESTOR SHARES*                 7.20%                -6.94%                 11.52%            0.22%       Less than 0.005%
Average Large-Cap
 Growth Fund**                         7.18                 -8.92                   9.37             1.51                   0.63
Spliced Growth Index+                  7.38                 -6.79                  11.61              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.
+    The Spliced Index  reflects the  performance  of the Fund's  previous index
     through May 16, 2003, and of the current MSCI Index thereafter.


- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance,  which is disclosed in the table  above.  The board  concluded
     that the Fund  outperformed or performed near the average  large-cap growth
     fund and its benchmark index over the short- and long-term.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

                                      B-36


- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  to was continue the investment  management  arrangement  with
     Vanguard.

VANGUARD SMALL-CAP GROWTH INDEX FUND

The board  considered the following  factors when  determining  whether Vanguard
should continue providing internalized investment management services at cost to
the Fund:

- -    The nature, extent, and quality of the services provided.

- -    The investment performance of the Fund's assets managed by Vanguard.

- -    The fair market value of the services provided.

- -    A  comparative  analysis of expense  ratios of, and advisory  fees paid by,
     similar funds.

- -    Vanguard's control of the operating expenses of the Fund.

     The specific Fund  performance and advisory fee  information  considered by
the board included the following:



                                                                                                
                                             AVERAGE ANNUAL RETURN (BEFORE TAXES)
                                             ------------------------------------

                                                                                 10 YEARS                           ADVISORY FEES
                                                                                (or since                         EXPRESSED AS AN
                                                           5 YEARS             inception)                        ANNUAL EFFECTIVE
                                1 YEAR ENDED                 ENDED                  ENDED                      RATE OF THE FUNDS'
                                  12/31/2004            12/31/2004             12/31/2004    EXPENSE RATIO      AVERAGE NET ASSET
                                  ----------            ----------             ----------    -------------      -----------------
VANGUARD SMALL-CAP GROWTH
 INDEX FUND INVESTOR SHARES*
 (Inception date May 21, 1998)        16.06%                 7.17%                  7.50%            0.23%                  0.01%
Average Small-Cap Growth Fund**       10.65                 -0.98                   6.18             1.71                   0.77
Spliced Small Cap Growth Index+       16.13                  6.75                   7.11              N/A                    N/A

*    Information  about the Fund's other share classes may be found elsewhere in
     this Statement of Additional Information.
**   Derived from data provided by Lipper Inc.
+    The Spliced Index  reflects the  performance  of the Fund's  previous index
     through May 16, 2003, and of the current MSCI Index thereafter.



- -    The  board   considered   the  Fund's  short-  and   long-term   investment
     performance,  which is disclosed in the table  above.  The board  concluded
     that the Fund significantly  outperformed the average small-cap growth fund
     over the short- term and  outperformed  the average  small-cap  growth fund
     over the  long-term.  The board also noted that the Fund performed near its
     benchmark index over the short-term and slightly outperformed its benchmark
     index over the long-term.

- -    The board concluded that, in the aggregate, the nature, extent, and quality
     of services  provided by  Vanguard to the Fund are  appropriate  and should
     continue.

- -    The  board  assessed  the  advisory  expenses  incurred  by  the  Fund  and
     considered  the fair market value of the services  provided in light of the
     expenses  incurred.  The board  concluded  that the expenses  incurred were
     significantly  less  than the  average  advisory  fee paid by others in the
     Fund's Lipper peer group.

- -    Based  upon  its  most  recent  evaluation  of the  investment  staff,  the
     portfolio management process, the investment performance,  and the at-cost,
     internalized management arrangements, the board of the Fund determined that
     it would be in the best  interests of the Fund's  shareholders  to continue
     its internalized management arrangement.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best  interests  of  the  Fund's
     shareholders  was to continue the investment  management  arrangement  with
     Vanguard.

     Based  upon its most  recent  evaluation  of each,  then  existing,  Fund's
investment  staff, the portfolio  management  process,  the short- and long-term
performance results, and the at-cost,  internalized  management arrangements for
each Fund, the board  determined  that it would be in the best interests of each
Fund's shareholders to continue its internalized management arrangements.

                                      B-37


OTHER ACCOUNTS MANAGED

Michael H. Buek managed the 500 Index Fund,  Small-Cap Index Fund, and Small-Cap
Value Index Fund,  which, as of December 31, 2004,  collectively  held assets of
$119,258,000,000.  Mr.  Buek  also  managed  four  other  registered  investment
companies  with total assets of  $9,615,000,000,  as of December  31, 2004,  and
three other pooled investment vehicles with total assets of $433,400,000,  as of
December 31, 2004.

Donald M. Butler managed the Extended  Market Index Fund and Mid-Cap Index Fund,
which, as of December 31, 2004, collectively held assets of $17,748,000,000. Mr.
Butler also  managed  three other  registered  investment  companies  with total
assets of  $49,060,000,000,  as of  December  31,  2004,  and two  other  pooled
investment  vehicles  with total  assets of  $1,357,500,000,  as of December 31,
2004.

Ryan E. Ludt managed the Large-Cap  Index Fund,  which, as of December 31, 2004,
held  assets of  $119,000,000.  Mr.  Ludt also  managed  four  other  registered
investment  companies  with total assets of  $1,817,000,000,  as of December 31,
2004,   and  one  other   pooled   investment   vehicle  with  total  assets  of
$2,239,500,000, as of December 31, 2004.

Gerard C. O'Reilly  managed the Total Stock Market Index Fund, Value Index Fund,
Growth Index Fund, and Small-Cap  Growth Index Fund,  which,  as of December 31,
2004,  collectively  held assets of  $74,673,000,000.  Mr. O'Reilly also managed
three other registered investment companies with total assets of $6,280,000,000,
as of December 31,  2004,  and one other  pooled  investment  vehicle with total
assets of $226,200,000, as of December 31, 2004.

MATERIAL CONFLICTS OF INTEREST

At Vanguard,  individual  portfolio  managers may manage  multiple  accounts for
multiple clients.  In addition to mutual funds, these other accounts may include
separate  accounts,  collective  trusts,  or offshore  funds.  Vanguard  manages
potential  conflicts  between  funds or with  other  types of  accounts  through
allocation policies and procedures,  internal review processes, and oversight by
directors and independent third parties. Vanguard has developed trade allocation
procedures  and controls to ensure that no one client,  regardless  of type,  is
intentionally  favored  at the  expense  of  another.  Allocation  policies  are
designed to address potential conflicts in situations where two or more funds or
accounts participate in investment decisions involving the same securities.

DESCRIPTION OF COMPENSATION

As of December 31, 2004, a Vanguard portfolio manager's  compensation  generally
consists  of  base  salary,  bonus,  and  payments  under  Vanguard's  long-term
incentive compensation program. In addition, portfolio managers are eligible for
the standard  retirement  benefits and health and welfare benefits  available to
all Vanguard  employees.  Also,  certain portfolio  managers may be eligible for
additional retirement benefits under several supplemental  retirement plans that
Vanguard  adopted in the 1980's to restore  dollar-for-dollar  the  benefits  of
management  employees  that  had been cut  back  solely  as a result  of tax law
changes.  These plans are structured to provide the same retirement  benefits as
the standard retirement benefits.

     In the  case  of  portfolio  managers  responsible  for  managing  multiple
Vanguard funds or accounts,  the method used to determine their  compensation is
the same for all funds and investment accounts.

     A portfolio manager's base salary is determined by the manager's experience
and  performance  in the role,  taking into  account  the  ongoing  compensation
benchmark  analyses  performed by the Vanguard  Human  Resources  Department.  A
portfolio manager's base salary is generally a fixed amount that may change as a
result of an annual  review,  upon  assumption  of new duties,  or when a market
adjustment of the position occurs.

     A portfolio  manager's  bonus is  determined  by a number of  factors.  One
factor is gross,  pre-tax  performance of the fund relative to expectations  for
how the fund should have performed, given its objectives,  policies,  strategies
and limitations,  and the market environment during the measurement period. This
performance  factor  is not  based on the  value of  assets  held in the  fund's
portfolio.  For the Funds,  the  performance  factor  depends on how closely the
portfolio  manager  tracks the fund's  benchmark  index over a one-year  period.
Additional  factors  include  the  portfolio  manager's   contributions  to  the
investment management functions within the sub-asset class, contributions to the
development of other investment  professionals and supporting staff, and overall
contributions to strategic  planning and decisions for the investment group. The
target bonus is expressed as a percentage of base salary.  The actual bonus paid
may be more or less  than the  target  bonus,  based  on how  well  the  manager
satisfies the objectives stated above. The bonus is paid on an annual basis.

                                      B-38


     Under the long-term incentive compensation program, all full-time employees
receive a payment from Vanguard's long-term incentive compensation plan based on
their   years  of  service,   job  level,   and,   if   applicable,   management
responsibilities.  Each year,  Vanguard's  independent  directors  determine the
amount of the long-term incentive  compensation award for that year based on the
investment  performance  of the  Vanguard  funds  relative  to  competitors  and
Vanguard's operating efficiencies in providing services to the Vanguard funds.

OWNERSHIP OF SECURITIES

Vanguard employees,  including  portfolio  managers,  allocate their investments
among the various Vanguard funds based on their own individual  investment needs
and goals.  Vanguard  employees  as a group  invest a sizeable  portion of their
personal assets in Vanguard funds. As of December 31, 2004,  Vanguard  employees
collectively invested $1.27 billion in Vanguard funds. John J. Brennan, Chairman
and Chief Executive  Officer of Vanguard and the Vanguard  funds,  and George U.
Sauter, Managing Director and Chief Investment Officer, invest substantially all
of their personal financial assets in Vanguard funds.

     As of December 31, 2004, Mr. Buek owned shares of the 500 Index Fund within
the  $10,001-$50,000  range,  and Mr.  O'Reilly  owned shares of the Total Stock
Market  Index  Fund in the  $100,001-$500,000  range.  Except  as  noted  in the
previous  sentence,  as of December 31, 2004, the portfolio managers did not own
any shares of the Index Funds they managed.

                             PORTFOLIO TRANSACTIONS

The advisor decides which securities to buy and sell on behalf of a Fund and
then selects the brokers or dealers that will execute the trades on an agency
basis or the dealers with whom the trades will be effected on a principal basis.
For each trade, the advisor must select a broker-dealer that it believes will
provide "best execution." Best execution does not mean the lowest possible
spread or commission rate. In seeking best execution, the SEC has said that an
advisor should consider the full range of a broker-dealer's services. The
factors considered by the advisor in seeking best execution include, but are not
limited to, the broker-dealer's execution capability, clearance and settlement
services, commission rate, trading expertise, willingness and ability to commit
capital, ability to provide anonymity, financial responsibility, reputation and
integrity, responsiveness, access to underwritten offerings and secondary
markets, and access to company management, as well as the value of any research
provided by the broker-dealer. In assessing which broker-dealer can provide best
execution for a particular trade, the advisor also may consider the timing and
size of the order and available liquidity and current market conditions.

   Currently, it is each Fund's policy that the advisor may at times pay higher
commissions in recognition of brokerage services felt necessary for the
achievement of better execution of certain securities transactions that
otherwise might not be available. The advisor will only pay such higher
commissions if it believes this to be in the best interest of the Fund.

 During the fiscal years ended December 31, 2002, 2003, and 2004, the Funds paid
brokerage commissions in the following amounts:

FUND                                          2002        2003        2004
- ----                                          ----        ----        ----
Vanguard Total Stock Market Index Fund  $1,919,000  $3,056,000  $3,263,000
Vanguard 500 Index Fund                  4,386,000   2,681,000   2,944,000
Vanguard Extended Market Index Fund        758,000     846,000   1,063,000
Vanguard Large-Cap Index Fund                  N/A         N/A      14,000
Vanguard Mid-Cap Index Fund                621,000   1,648,000     860,000
Vanguard Small-Cap Index Fund            2,050,000   1,996,000   1,314,000
Vanguard Value Index Fund                  567,000     314,000     289,000
Vanguard Small-Cap Value Index Fund      1,187,000   1,154,000     549,000
Vanguard Growth Index Fund                 743,000   1,021,000     574,000
Vanguard Small-Cap Growth Index Fund       133,000     291,000     290,000

                                      B-39