MFS Active Core Plus Bond ETF (MFSB) is an exchange-traded fund in the Intermediate Core Plus Bond category. It has $469.03M in assets, an expense ratio of 0.34% and a 4.57% dividend yield. The fund normally invests at least 80% of the fund’s net assets in debt instruments. Debt instruments include corporate debt instruments, U.S. government securities, foreign government securities, securitized instruments (including mortgage-backed securities and other asset-backed securities), municipal instruments, and other obligations to repay money borrowed.