BlackRock Municipal Bond Fund, Inc.

BlackRock High Yield Fund

FILE #811-02688

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	LIST OF UNDERWRITERS
10/20/08	METROPOLITAN TRANSN AUTH N Y REV	550,000,000	980,000	J.P. Morgan Securities Inc., Ramirez & Co., Inc., Citi, Barclays Capital Inc., Banc of America Securities LLC, DEPFA First Albany Securities LLC, Loop Capital Markets, LLC, M.R. Beal & Company, Merrill Lynch & Company, Morgan Stanley, Raymond James & Associates, RBC Capital Markets, Roosevelt & Cross, Incorporated, Siebert Brandford Shank & Co., Wachovia Bank, N.A