BlackRock Investment Quality Municipal Trust Inc. operates as a diversified, closed-end management investment company. It invests primarily in municipal bonds. The trust's portfolio comprises investments in industrial and pollution control, education, hospital, transportation, power, tobacco, housing, and water and sewer sectors. BlackRock Advisors, Inc. serves as the investment advisor of the trust. Blackrock Investment Quality Municipal Trust was founded in 1992 and is based in Wilmington, Delaware.