<SEC-DOCUMENT>0001341004-14-000794-index.html : 20140918
<SEC-HEADER>0001341004-14-000794.hdr.sgml : 20140918
<ACCEPTANCE-DATETIME>20140918131539
ACCESSION NUMBER:		0001341004-14-000794
CONFORMED SUBMISSION TYPE:	425
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20140918
DATE AS OF CHANGE:		20140918

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK INCOME OPPORTUNITY TRUST INC.
		CENTRAL INDEX KEY:			0000880280
		IRS NUMBER:				133634989
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		425
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-06443
		FILM NUMBER:		141109677

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			NY
		ZIP:			19809
		BUSINESS PHONE:		888-825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK INCOME OPPORTUNITY TRUST INC
		DATE OF NAME CHANGE:	20021108

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK NORTH AMERICAN GOVERNMENT INCOME TRUST INC
		DATE OF NAME CHANGE:	19920929

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKSTONE NORTH AMERICAN GOVERNMENT INCOME TRUST INC
		DATE OF NAME CHANGE:	19600201

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK CORE BOND TRUST
		CENTRAL INDEX KEY:			0001160864
		IRS NUMBER:				522346891
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		425

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		888-825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
</SEC-HEADER>
<DOCUMENT>
<TYPE>425
<SEQUENCE>1
<FILENAME>form425.htm
<DESCRIPTION>FORM 425
<TEXT>
Document 1 - file: form425.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>form4250.jpg
<TEXT>
Document 2 - file: form4250.jpg

</DOCUMENT>
</SEC-DOCUMENT>