BlackRock MuniYield Michigan Insured Fund, Inc.

FILE #811-07080

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	LIST OF UNDERWRITERS
2/16/07	PUERTO RICO COMMONWEALTH	2,184,860,553	6,200,000	Citigroup; Goldman, Sachs & Co.; RBC Capital Markets; Banc of America Securities LLC; BBVAPR MSD; JP Morgan; Lehman Brothers; Merrill Lynch & Co.; Morgan Stanley; Popular Securities; Raymond James & Associates, Inc.; Samuel A. Ramirez & Co.; Santander Securities; UBS Investment Bank; Wachovia Bank, National Association