Exhibit 4(a) INVESTMENT MANAGEMENT AGREEMENT AGREEMENT, dated October 2, 2006, between BlackRock Municipal Bond Fund, Inc. (the "Corporation"), a Maryland corporation, on behalf of BlackRock Municipal Insured Fund, BlackRock National Municipal Fund...Investment Management Agreement • August 16th, 2006 • Merrill Lynch Municipal Bond Fund Inc • New York
Exhibit 4(d) SUB-INVESTMENT ADVISORY AGREEMENT AGREEMENT dated October 2, 2006, between BlackRock Advisors, LLC, a Delaware limited liability corporation (the "Advisor"), and BlackRock Investment Management, LLC, a Delaware limited liability...Sub-Investment Advisory Agreement • August 16th, 2006 • Merrill Lynch Municipal Bond Fund Inc • New York
