BlackRock Municipal Bond Fund, Inc.

BlackRock National Municipal Fund

FILE #811-02688

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	LIST OF UNDERWRITERS
6/21/2007	California State GO	2,500,000,000	18,330,000	Citigroup Global Markets Inc., Banc of America Securities LLC, E.J. De La Rosa & Co., Inc., Fidelity Capital Markets Services, Alamo Capital, ALTA CAPITAL GROUP LLC, Backstrom McCarley Berry  & Co.,LLC, Bear, Stearns & Co. Inc., Comerica Securities, Crocker Securities LLC, Goldman, Sachs & Co.,Great Pacific Securities Inc., Grigsby & Associates, Inc., J.P. Morgan Securities Inc., Henderson Capital Partners, Inc., Lehman Brothers, Merrill Lynch & Co., Morgan Stanley & Co. Incorporated, RBC Capital Markets,Ramirez & Co., Inc., Siebert Brandford Shank & Co., Stone & Youngberg LLC, UBS Securities LLC,Wedbush Morgan Securities, Wells Fargo Brokerage Services LLC.

BlackRock Municipal Bond Fund, Inc.

BlackRock National Municipal Fund

FILE #811-02688

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	LIST OF UNDERWRITERS
6/21/2007	California State GO	2,500,000,000	3,600,000	Citigroup Global Markets Inc., Banc of America Securities LLC, E.J. De La Rosa & Co., Inc., Fidelity Capital Markets Services, Alamo Capital, ALTA CAPITAL GROUP LLC, Backstrom McCarley Berry  & Co.,LLC, Bear, Stearns & Co. Inc., Comerica Securities, Crocker Securities LLC, Goldman, Sachs & Co.,Great Pacific Securities Inc., Grigsby & Associates, Inc., J.P. Morgan Securities Inc., Henderson Capital Partners, Inc., Lehman Brothers, Merrill Lynch & Co., Morgan Stanley & Co. Incorporated, RBC Capital Markets,Ramirez & Co., Inc., Siebert Brandford Shank & Co., Stone & Youngberg LLC, UBS Securities LLC,Wedbush Morgan Securities, Wells Fargo Brokerage Services LLC.
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 Lynch

BlackRock Municipal Bond Fund, Inc.

BlackRock National Municipal Fund

FILE #811-02688

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	LIST OF UNDERWRITERS
3/5/2008	California State	1,750,000,000.00	3,975,000	Siebert Brandford Shank & Co., LLC, E.J. De La Rosa & Co., Inc, Stone & Youngberg, Morgan Stanley & Co. Incorporated, Banc of America Securities LLC, Bear, Stearns & Co. Inc., Butler Wick & Co., Inc., Cabrera Capital Markets, LLC, Citi, City National Securities, Inc., DEPFA First Albany Securities LLC, Fidelity Capital Markets Services, First Southwest Company, Goldman, Sachs & Co., Great Pacific Securities, Jackson Securities, JPMorgan, Lehman Brothers, Loop Capital Markets, LLC, Merrill Lynch & Co., Morgan Keegan and Co., Inc., M.R. Beal & Company, Prager, Sealy & Company LLC, RBC Capital Markets, Ramirez & Co., Inc., Rice Financial Products Company, SL Hare Capital, Inc., Southwest Securities Inc., Toussaint Capital Partners, LLC, UBS Securities LLC, Wedbush Morgan Securities, Wells Fargo Institutional Securities, LLC

BlackRock Municipal Bond Fund, Inc.

BlackRock National Municipal Fund

FILE #811-02688

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	LIST OF UNDERWRITERS
6/5/2008	MIAMI-DADE CNTY FLA AVIATION REV	600,000,000	7,320,000	Banc of America Securities LLC, Estrada Hinojosa & Company, Inc., JPMorgan, Merrill Lynch & Co., Rice Financial Products Company, Butler Wick & Co., Inc., Goldman, Sachs & Co., Jackson Securities, Lehman Brothers, Loop Capital Markets, LLC, M.R. Beal & Company, Raymond James & Associates, Inc., Siebert Brandford Shank & Co., LLC, Wachovia Bank, National Association
6/5/2008	MIAMI-DADE CNTY FLA AVIATION REV	600,000,000	5,185,000	Banc of America Securities LLC, Estrada Hinojosa & Company, Inc., JPMorgan, Merrill Lynch & Co., Rice Financial Products Company, Butler Wick & Co., Inc., Goldman, Sachs & Co., Jackson Securities, Lehman Brothers, Loop Capital Markets, LLC, M.R. Beal & Company, Raymond James & Associates, Inc., Siebert Brandford Shank & Co., LLC, Wachovia Bank, National Association

BlackRock Municipal Bond Fund, Inc.

BlackRock National Municipal Fund

FILE #811-02688

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	LIST OF UNDERWRITERS
6/12/2008	NEW YORK N Y CITY TRANSITIONAL FIN	700,000,000	10,000,000	Goldman, Sachs & Co., Citi, Banc of America Securities LLC, DEPFA First Albany Securities LLC, JPMorgan, Lehman Brothers, Loop Capital Markets LLC, M.R. Beal & Company, Merrill Lynch & Co., Morgan Stanley, Prager, Sealy & Co., LLC, Ramirez & Co., Inc., Roosevelt and Cross Incorporated, Siebert Brandford Shank & Co., LLC, Wachovia Bank, National Association, Jackson Securities Inc., Raymond James & Associates, Inc., RBC Capital Markets, Stifel Nicolaus, Southwest Securities.