MFS Active Intermediate Muni Bond ETF (MFSM) is an exchange-traded fund in the Muni National Interm category. It has $100.58M in assets, an expense ratio of 0.34% and a 3.55% dividend yield. The fund normally invests at least 80% of the fund’s net assets in municipal instruments, the interest on which is exempt from federal income tax. Interest from the fund’s investments may be subject to the federal alternative minimum tax. It normally invests the fund’s assets primarily in municipal instruments.