BlackRock Municipal Bond Investment Trust operates as nondiversified closed-end management investment company. The trust invests primarily in municipal securities. Its portfolio comprises investments in hospitals; industrial and pollution control; housing; lease; transportation; water and sewer; education; and power sectors. BlackRock Advisors, Inc. serves as the investment adviser of the trust. BlackRock Municipal Bond Investment Trust was founded in 2002 and is based in Wilmington, Delaware.