Series and Classes/Contracts Information:
| Existing | |||
| Status | Name | Ticker Symbol | |
| CIK 0000063075 | |||
| Series S000002492 | MFS Corporate Bond Fund | ||
| Class/Contract C000006711 | A | MFBFX | |
| Class/Contract C000006712 | R4 | MFBJX | |
| Class/Contract C000006716 | B | MFBBX | |
| Class/Contract C000006717 | C | MFBCX | |
| Class/Contract C000006718 | I | MBDIX | |
| Class/Contract C000006720 | R1 | MFBGX | |
| Class/Contract C000006722 | R2 | MBRRX | |
| Class/Contract C000006723 | R3 | MFBHX | |
| Class/Contract C000070424 | R6 | MFBKX | |
IRS No.: 042535629 | State of Incorp.: MA | Fiscal Year End: 0430
Type: NPORT-P | Act: 40 | File No.: 811-02464 | Film No.: 231516805