Post-effective Amendment (investment Company, Rule 485(b)) (485bpos)

L AURENCE D. F INK *

(Laurence D. Fink)

H ENRY G ABBAY *

(Henry Gabbay)

As filed with the U.S. Securities and Exchange Commission on February 8, 2013

Securities Act File No. 2-62329

Investment Company Act File No. 811-02857

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549


FORM N-1A
REGISTRATION STATEMENT
*UNDER*
*THE SECURITIES ACT OF 1933*		x
Pre-Effective Amendment No.		¨
Post-Effective Amendment No. 53		x
and/or
REGISTRATION STATEMENT
*UNDER*
*THE INVESTMENT COMPANY ACT OF 1940*		x

Amendment No. 49

(Check appropriate box or boxes)

BlackRock Bond Fund, Inc.

(Exact Name of Registrant as Specified in Charter)

100 Bellevue Parkway

Wilmington, Delaware 19809

(Address of Principal Executive Office)

Registrant’s Telephone Number, including Area Code (800) 441-7762

John M. Perlowski

BlackRock Bond Fund, Inc.

55 East 52 ^nd Street, New York, New York 10055

(Name and Address of Agent for Service)

Copies to:

Counsel for the Fund:

Margery K. Neale, Esq.

Willkie Farr & Gallagher LLP

787 Seventh Avenue

New York, New York 10019-6099

Benjamin Archibald, Esq.

BlackRock Advisors, LLC

55 East 52 ^nd Street

New York, New York 10055

Continuous

(Approximate Date of Proposed Offering)

It is proposed that this filing will become effective:

x

immediately upon filing pursuant to paragraph (b)

¨

on (date) pursuant to paragraph (b)

¨

60 days after filing pursuant to paragraph (a)(1)

¨

on (date) pursuant to paragraph (a)(1)

¨

75 days after filing pursuant to paragraph (a)(2)

¨

on (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

¨

This post-effective amendment designates a new effective date for a previously filed post-effective amendment.


Title of Securities Being Registered: Shares of Common Stock, Par Value, $.10 per share.

Master Bond LLC and BlackRock Cayman Master Total Return Portfolio I, Ltd have also executed this registration statement.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all the requirements for the effectiveness of this Registration Statement under Rule 485(b) under the Securities Act and it has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, and the State of New York on the 8 ^th day of February, 2013.


B LACKROCK B OND F UND , I NC .
(R EGISTRANT )

on behalf of BlackRock Total Return Fund

By:		/s/ JOHN M. PERLOWSKI
		(John M. Perlowski,
		President and Chief Executive Officer)

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:


Signature	Title	Date

/s/ JOHN M. PERLOWSKI	President and Chief Executive Officer	February 8, 2013
(John M. Perlowski)	(Principal Executive Officer)

/s/ NEAL J. ANDREWS	Chief Financial Officer	February 8, 2013
(Neal J. Andrews)	(Principal Financial and Accounting Officer)

J AMES H. B ODURTHA *	Director
(James H. Bodurtha)

B RUCE R. B OND *	Director
(Bruce R. Bond)

D ONALD W. B URTON *	Director
(Donald W. Burton)

S TUART E. E IZENSTAT *	Director
(Stuart E. Eizenstat)

K ENNETH A. F ROOT *	Director
(Kenneth A. Froot)

R OBERT M. H ERNANDEZ *	Director
(Robert M. Hernandez)

J OHN F. O’ BRIEN *	Director
(John F. O’Brien)

R OBERTA C OOPER R AMO *	Director
(Roberta Cooper Ramo)

D AVID H. W ALSH *	Director
(David H. Walsh)

F RED G. W EISS *	Director
(Fred G. Weiss)

P AUL L. A UDET *	Director
(Paul L. Audet)

*By:

/s/ B ENJAMIN A RCHIBALD

February 8, 2013

Benjamin Archibald

(Attorney-in-Fact)

SIGNATURES

Pursuant to the requirements of the Investment Company Act of 1940, Master Bond LLC has duly caused this Registration Statement of BlackRock Bond Fund, Inc. to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, and State of New York, on the 8 ^th day of February, 2013.


M ASTER B OND LLC
(R EGISTRANT )

By:		/s/ JOHN M. PERLOWSKI
		(John M. Perlowski,
		President and Chief Executive Officer)

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment to the Registration Statement of BlackRock Bond Fund, Inc. has been signed below by the following persons in the capacities and on the dates indicated.


Signature	Title	Date

/s/ JOHN M. PERLOWSKI	President and Chief Executive Officer	February 8, 2013
(John M. Perlowski)	(Principal Executive Officer)

/s/ NEAL J. ANDREWS	Chief Financial Officer	February 8, 2013
(Neal J. Andrews)	(Principal Financial and Accounting Officer)

J AMES H.B ODURTHA *	Director
(James H. Bodurtha)

B RUCE R. B OND *	Director
(Bruce R. Bond)

D ONALD W. B URTON *	Director
(Donald W. Burton)

S TUART E. E IZENSTAT *	Director
(Stuart E. Eizenstat)

K ENNETH A. F ROOT *	Director
(Kenneth A. Froot)

R OBERT M. H ERNANDEZ *	Director
(Robert M. Hernandez)

J OHN F. O’ BRIEN *	Director
(John F. O’Brien)

R OBERTA C OOPER R AMO *	Director
(Roberta Cooper Ramo)

D AVID H. W ALSH *	Director
(David H. Walsh)

F RED G. W EISS *	Director
(Fred G. Weiss)

P AUL L. A UDET *	Director
(Paul L. Audet)

*By:

/s/ B ENJAMIN A RCHIBALD

February 8, 2013

Benjamin Archibald

(Attorney-in-Fact)

SIGNATURES

BlackRock Cayman Master Total Return Portfolio I, Ltd. has duly caused this Registration Statement of BlackRock Bond Fund, Inc., with respect only to information that specifically relates to BlackRock Cayman Master Total Return Portfolio I, Ltd., to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, and State of New York, on the 8 ^th day of February, 2013.


B LACKROCK C AYMAN M ASTER T OTAL R ETURN P ORTFOLIO I, L TD .

By:		/s/ P AUL L. A UDET
		Paul L. Audet
		Director

This Post-Effective Amendment to the Registration Statement of BlackRock Bond Fund, Inc., with respect only to information that specifically relates to BlackRock Cayman Master Total Return Portfolio I, Ltd., has been signed below by the following persons in the capacities on the dates indicated:


Signature	Title	Date

/ S / P AUL L. A UDET	Director, BlackRock Cayman Master Total Return Portfolio I, Ltd.	February 8, 2013
Paul L. Audet

/ S / H ENRY G ABBAY	Director, BlackRock Cayman Master Total Return Portfolio I, Ltd.	February 8, 2013
Henry Gabbay

EXHIBIT INDEX


Index No.		Description of Exhibit

EX-101.INS		XBRL Instance Document

EX-101.SCH		XBRL Taxonomy Extension Schema Document

EX-101.CAL		XBRL Taxonomy Extension Calculation Linkbase

EX-101.DEF		XBRL Taxonomy Extension Definition Linkbase

EX-101.LAB		XBRL Taxonomy Extension Labels Linkbase

EX-101.PRE		XBRL Taxonomy Extension Presentation Linkbase