EDGAR Filing Documents for 0001181431-12-007318

Form 4 - Statement of changes in beneficial ownership of securities:

SEC Accession No. 0001181431-12-007318

Filing Date

2012-02-09

Accepted

2012-02-09 17:18:00

Documents

Period of Report

2012-01-31

Document Format Files

Seq	Description	Document	Type	Size
1	FORM 4	rrd333514.html	4
1	FORM 4	rrd333514.xml	4	4832
	Complete submission text file	0001181431-12-007318.txt		6742

Mailing Address 100 BELLEVUE PARKWAY WILMINGTON DE 19809

Business Address 100 BELLEVUE PARKWAY WILMINGTON DE 19809 800-441-7762

BLACKROCK MUNIYIELD INVESTMENT QUALITY FUND (Issuer) CIK: 0000891188 (see all company filings)

IRS No.: 223196058 | Fiscal Year End: 0630
SIC: 0000

Mailing Address 677 WASHINGTON BLVD. STAMFORD CT 06901

Business Address BAHNHOFSTRASSE 45 P O BOX CH 8001 ZURICH V8 CH 8001 203-719-5241

UBS AG (Reporting) CIK: 0001114446 (see all company filings)

State of Incorp.: V8 | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 811-07156 | Film No.: 12588401
SIC: 6021 National Commercial Banks