497 1 d489358d497.htm LETTER LETTER

LOGO

  

SIDLEY AUSTIN LLP

787 SEVENTH AVENUE

NEW YORK, NY 10019

(212) 839 5300

(212) 839 5599 FAX

  

BEIJING

BRUSSELS

CHICAGO

DALLAS

FRANKFURT

GENEVA

HONG KONG

HOUSTON

LONDON

 

FOUNDED 1866

  

LOS ANGELES

NEW YORK

PALO ALTO

SAN FRANCISCO

SHANGHAI

SINGAPORE

SYDNEY

TOKYO

WASHINGTON, D.C.

February 22, 2013

VIA EDGAR

Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

 

  Re: BlackRock Global Opportunities Portfolio, BlackRock International

Opportunities Portfolio and BlackRock Managed Volatility Portfolio, each a series of BlackRock FundsSM

(File Nos. 33-26305, 811-05742)

Ladies and Gentlemen:

On behalf of BlackRock FundsSM, attached for filing are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in the Prospectuses of BlackRock Global Opportunities Portfolio, BlackRock International Opportunities Portfolio and BlackRock Managed Volatility Portfolio (the “Funds”), dated January 28, 2013, as filed pursuant to Rule 497(e) under the Securities Act of 1933, on February 4, 2013 (the “497 Filing”). The purpose of this filing is to submit the 497 Filing in XBRL for the Funds.

Any questions or comments on the 497 Filing should be directed to the undersigned at (212) 839-5583.

 

Very truly yours,
/s/ Ellen W. Harris
Ellen W. Harris

Enclosures

 

cc: Benjamin Archibald, Esq.

BlackRock Advisors, LLC

Sidley Austin (NY) LLP is a Delaware limited liability partnership doing business as Sidley Austin LLP and practicing in affiliation with other Sidley Austin partnerships.