February 15, 2013
U.S. Securities & Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Re:	Vanguard World Funds (the “Trust”); File No. 2-17620
Commissioners:
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 supplement dated January 31, 2013, filed pursuant to Rule 497(e), for the
Vanguard Mega Cap Index Fund, a series of the above mentioned Trust.
If you have any questions or comments concerning the foregoing, please contact me at
(610) 669-1538.
Sincerely,
Judith L. Gaines
Associate Counsel
The Vanguard Group, Inc.
Enclosures
cc: Chad Eskildsen, Esq.
U. S. Securities and Exchange Commission