MFS Total Return Bond R6 (MFS Total Return Bond Fund Clas) fond

The fund normally invests at least 80% of its net assets in debt instruments. Debt instruments include corporate bonds, U.S. government securities, foreign government securities, securitized instruments, municipal instruments and other obligations to repay money borrowed. It primarily invests the fund's assets in investment grade quality debt instruments, but may also invest in below investment grade quality debt instruments.