AMERICAN CENTURY INVESTMENTS
4500 MAIN STREET
KANSAS CITY, MISSOURI 64111
November 7, 2006
VIA EDGAR
Mr. Howie Hallock, Jr.
Securities and Exchange Commission
100 F Street NE
Washington, DC 20549
Re: Acceleration of Effective Date for American Century Mutual Funds, Inc. (the
"Registrant") (2-14213, 811-0816)
Dear Mr. Hallock:
As you are aware, the Registrant and its principal underwriter, American
Century Investment Services, Inc. (the "Underwriter"), have orally requested
that the Registrant's registration statement on Form N-14 become effective on
Thursday, November 9, 2006. The purpose of this letter is to confirm such fact
and confirm that the Registrant and Underwriter are aware of their obligations
under the Securities Act of 1933.
Sincerely,
AMERICAN CENTURY MUTUAL
FUNDS, INC.
By: /s/ Brian L Brogan
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Brian L. Brogan
Assistant Vice President
AMERICAN CENTURY INVESTMENT
SERVICES, INC.
By: /s/ Brian L. Brogan
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Brian L. Brogan
Assistant Secretary