497 1 d421801d497.htm 497 497

787 Seventh Avenue

New York, NY 10019-6099

Tel: 212 728 8000

Fax: 212 728 8111

October 12, 2012


Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549


Re: BlackRock Balanced Capital Portfolio, a series of BlackRock Series Fund, Inc.

(File No. 2-69062)

Ladies and Gentlemen:

On behalf of BlackRock Series Fund, Inc. and pursuant to Rule 497(e) under the Securities Act of 1933, as amended, attached for filing are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in the Prospectus dated May 1, 2012, as amended October 5, 2012, for BlackRock Balanced Capital Portfolio (the “Fund”). The purpose of the filing is to submit the 497(e) filing dated October 5, 2012 in XBRL for the Fund.

Any questions or comments on this filing should be directed to the undersigned at 212-728-8510.


Very truly yours,

/s/ Anthony Geron

Anthony Geron


cc: Ben Archibald, Esq., BlackRock Advisors, LLC