MFS Municipal Income Trust Shares of Beneficial Interest, also called MFS Municipal Income Trust, is a closed-end investment fund/investment trust. The company’s investment objective is to seek high current income, but may also consider capital appreciation. Read More Its portfolio includes high yield corporate, high grade corporate, non-United States government bonds, emerging markets bonds, mortgage-backed securities, United States treasury securities, commercial mortgage-backed securities, floating rate loans, asset-backed securities, United States government agencies, residential mortgage-backed securities and collateralized debt obligations. The company is headquartered in Boston, MA. The listed name for MFM is MFS Municipal Income Trust Shares of Beneficial Interest.