| 40-17G | Fidelity bond filed pursuant to Rule 17g... | MFS SERIES TRUST IX , MASSACHUSETTS INVESTORS GROWTH STOCK FUND , MASSACHUSETTS INVESTORS TRUST , MFS SERIES TRUST V , MFS SERIES TRUST III , MFS SERIES TRUST VII , MFS SERIES TRUST XIII , MFS VARIABLE INSURANCE TRUST II , MFS MUNICIPAL SERIES TRUST , MFS SERIES T | | 06/29/2026 | |
| 497K | Summary Prospectus for certain open-end ... | Mfs Active Exchange Traded Funds Trust | | 06/25/2026 | |
| 497K | Summary Prospectus for certain open-end ... | Mfs Active Exchange Traded Funds Trust | | 06/25/2026 | |
| 485BPOS | Post-effective amendment filed pursuant ... | MFS Active Exchange Traded Funds Trust , MFS Active Exchange Traded Funds Trust | | 06/25/2026 | |
| 497K | Summary Prospectus for certain open-end ... | Mfs Active Exchange Traded Funds Trust | | 06/25/2026 | |
| 497K | Summary Prospectus for certain open-end ... | Mfs Active Exchange Traded Funds Trust | | 06/25/2026 | |
| 497K | Summary Prospectus for certain open-end ... | Mfs Active Exchange Traded Funds Trust | | 06/25/2026 | |
| 497K | Summary Prospectus for certain open-end ... | Mfs Active Exchange Traded Funds Trust | | 06/25/2026 | |
| 497K | Summary Prospectus for certain open-end ... | Mfs Active Exchange Traded Funds Trust | | 06/25/2026 | |
| 497K | Summary Prospectus for certain open-end ... | Mfs Active Exchange Traded Funds Trust | | 06/25/2026 | |
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