MFS Total Return B (MFS Total Return Trust B) Fonds

The fund invests its assets in equity securities and debt instruments. Equity securities include common stocks, depositary receipts, and other securities that represent an ownership interest (or right to acquire an ownership interest) in a company or other issuer. Debt instruments include corporate bonds, U.S. government securities, securitized instruments (including mortgage-backed securities and other asset-backed securities), and other obligations to repay money borrowed. MFS generally invests approximately 60% of the fund’s assets in equity securities and approximately 40% of the fund's assets in debt instruments.