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VANGUARD(R) U.S. STOCK INDEX FUNDS

SUPPLEMENT TO THE PROSPECTUS DATED AUGUST 17, 2006

The ticker symbols found in the Additional Information boxes on pages 11 and 14
of the prospectus are replaced with the following:

Page 11
Ticker Symbol
VMISX

Page 14
Ticker Symbol
VSISX









(C)2006 The Vanguard Group, Inc. All rights reserved.
Vanguard Marketing Corporation, Distributor.                      PS1341 082006







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VANGUARD(R) 500 INDEX FUND

SUPPLEMENT TO THE PROSPECTUS DATED AUGUST 17, 2006

The  ticker  symbol  found in the  Additional  Information  Box on page 4 of the
prospectus is replaced with the following:

Ticker Symbol
VIFSX
































(C)2006 The Vanguard Group, Inc. All rights reserved.
Vanguard Marketing Corporation, Distributor.                       PS1340 082006