UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	June 19, 2006

Form:

N-14

CIK: 0000225635 Company Name: MERRILL LYNCH MUNICIPAL BOND FUND INC File Number: 333-133875 SERIES/CLASSES (CONTRACTS) MERGERS CIK Series ID Class/Contract Name Acquiring: 0000225635 MERRILL LYNCH MUNICIPAL BOND FUND INC S000002335 Short Term Portfolio Target: 0000844779 BLACKROCK FUNDS S000001873 BLACKROCK ULTRASHORT MUNICIPAL PORTFOLIO C000004893 INSTITUTIONAL Target: 0000844779 BLACKROCK FUNDS S000001873 BLACKROCK ULTRASHORT MUNICIPAL PORTFOLIO C000004894 SERVICE Target: 0000844779 BLACKROCK FUNDS S000001873 BLACKROCK ULTRASHORT MUNICIPAL PORTFOLIO C000004895 INVESTOR A Target: 0000844779 BLACKROCK FUNDS S000001873 BLACKROCK ULTRASHORT MUNICIPAL PORTFOLIO C000004896 BLACKROCK