MFS High Income Municipal Trust is a close ended fixed income mutual fund launched and managed by Massachusetts Financial Services Company. It invests in the fixed income markets. The fund primarily invests in municipal bonds and local general obligations of various sectors, such as multifamily, hospitals, care retirement, and investor-owned utilities. The fund benchmarks the performance of its portfolio against Barclays Municipal Bond Index. It was formerly known as Colonial High Income Municipal Trust. MFS High Income Municipal Trust was formed on February 17, 1989 and is domiciled in United States.