BLACKROCK Municipal Bond Fund, Inc. National Fund

FILE #811-02688

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	LIST OF UNDERWRITERS
07/13/2007	Puerto Rico Sales Tax Financing Corp.	2,667,603,528	30,000,000	Goldman, Sachs & Co., Lehman Brothers A.G. Edwards & Sons, Inc.,Banc of America Securities LLC, BBVAPR MSD, Bear, Stearns & Co. Inc., Citigroup Global Markets Inc., First Albany Capital Inc., J.P. Morgan Securities, Inc., Loop Capital Markets, Merrill Lyn