<SEC-DOCUMENT>0001193125-18-020991-index.html : 20180126
<SEC-HEADER>0001193125-18-020991.hdr.sgml : 20180126
<ACCEPTANCE-DATETIME>20180126122102
ACCESSION NUMBER:		0001193125-18-020991
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180126
DATE AS OF CHANGE:		20180126

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK MUNIYIELD INVESTMENT QUALITY FUND
		CENTRAL INDEX KEY:			0000891188
		IRS NUMBER:				223196058
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-84437
		FILM NUMBER:		18550767

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		800-441-7762

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK MUNIYIELD INSURED INVESTMENT FUND
		DATE OF NAME CHANGE:	20080926

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK MUNIYIELD FLORIDA INSURED FUND
		DATE OF NAME CHANGE:	20070611

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MUNIYIELD FLORIDA INSURED FUND /NJ/
		DATE OF NAME CHANGE:	19921217

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			JPMorgan Chase Bank, N.A.
		CENTRAL INDEX KEY:			0000835271
		STANDARD INDUSTRIAL CLASSIFICATION:	ASSET-BACKED SECURITIES [6189]
		IRS NUMBER:				134994650
		STATE OF INCORPORATION:			X1
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		1111 POLARIS PARKWAY
		CITY:			COLUMBUS
		STATE:			OH
		ZIP:			43240
		BUSINESS PHONE:		212-648-0466

	MAIL ADDRESS:	
		STREET 1:		1111 POLARIS PARKWAY
		CITY:			COLUMBUS
		STATE:			OH
		ZIP:			43240

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	JPMorgan Chase Bank, National Association
		DATE OF NAME CHANGE:	20050114

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CHASE MANHATTAN BANK /NY/
		DATE OF NAME CHANGE:	19960911

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CHEMICAL BANK
		DATE OF NAME CHANGE:	19930521
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>d417149dsc13ga.htm
<DESCRIPTION>SC 13G/A
<TEXT>
Document 1 - file: d417149dsc13ga.htm

</DOCUMENT>
</SEC-DOCUMENT>