MFS Municipal Income Fund Cl I (MIMIX) is a mutual fund that primarily invests in municipal bonds, which are debt securities issued by state and local governments. This fund aims to provide investors with a steady stream of tax-free income while also preserving capital. It may also invest in other fixed-income securities, such as corporate bonds and mortgage-backed securities. MIMIX is classified as a Class I fund, which typically has a higher minimum investment requirement and lower fees compared to other classes of the same fund. This fund is suitable for investors seeking tax-exempt income and a conservative investment approach.