497 1 index497supp.htm INDEX FUNDS 497 index497supp.htm - Generated by SEC Publisher for SEC Filing

May 1, 2013

U.S. Securities & Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Re: Vanguard Index Funds (the “Trust”); File No. 2-56846
Pursuant to Rule 497(e) under the Securities Act of 1933, we hereby file exhibits containing
interactive data format risk/return summary information that reflects the risk/return summary
information in the supplements dated April 17, 2013, filed pursuant to Rule 497(e), for the Vanguard
Value Index Fund, Vanguard Growth Index Fund, Vanguard Mid-Cap Value Index Fund, Vanguard
Mid-Cap Growth Index Fund, Vanguard Small-Cap Value Index Fund, and Vanguard Small-Cap
Growth Index Fund, each a series of the above mentioned Trust.
If you have any questions or comments concerning the foregoing, please contact me at
(610) 669-1538.
Judith L. Gaines
Associate Counsel
The Vanguard Group, Inc.
cc: Amy Miller, Esq.
U. S. Securities and Exchange Commission