CALVERT GROUP
4550 MONTGOMERY AVENUE
BETHESDA, MD 20814

August 2, 2011

Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549

Re:      The Calvert Fund
(High Yield Bond Fund)
File numbers 002-76510 and 811-03416
Post-Effective Amendment No. 91 under the Securities Act of 1933
and No. 91 under the Investment Company Act of 1940

Ladies and Gentlemen:

In lieu of filing under paragraph (b) or (c) of Section 497, the above registrant is hereby filing a certification that:

(1) the form of prospectus and statement of additional information that would have been filed under paragraph (b) or (c) of Section 497 would not have differed from those contained in the most recent registration statement (effective July 29, 2011); and

(2) the text of the most recent registration statement (effective July 29, 2011) has been filed electronically.

If you have questions or require further information, please contact me at 301-657-7045.

If you have any questions, please do not hesitate to contact me.

Sincerely,

/s/ Lancelot A. King
Lancelot A. King
Associate General Counsel