Series and Classes/Contracts Information:
| Existing | |||
| Status | Name | Ticker Symbol | |
| CIK 0000701939 | |||
| Series S000006773 | SDIT GOVERNMENT FUND | ||
| Class/Contract C000018365 | SDIT GOVERNMENT FUND - CLASS F, effective 1-31-2017 (formerly Class A) | SEOXX | |
| Class/Contract C000162326 | Class CAA | GFAXX | |
| Status | Name | Ticker Symbol | |
| CIK 0000701939 | |||
| Series S000006774 | SDIT TREASURY II FUND | ||
| Class/Contract C000018368 | SDIT TREASURY II FUND - CLASS F, effective 1-31-2017 (formerly Class A) | SCPXX | |
| Status | Name | Ticker Symbol | |
| CIK 0000701939 | |||
| Series S000006776 | SDIT GOVERNMENT II FUND | ||
| Class/Contract C000018374 | SDIT GOVERNMENT II FUND - CLASS F, effective 1-31-2017 (formerly Class A) | TCGXX | |
| Status | Name | Ticker Symbol | |
| CIK 0000701939 | |||
| Series S000008266 | SDIT ULTRA SHORT DURATION BOND FUND | ||
| Class/Contract C000022551 | SDIT ULTRA SHORT DURATION BOND FUND - CLASS F, effective 1-31-2017 (formerly Class A) | SECPX | |
| Class/Contract C000158211 | Class Y | SECYX | |
| Status | Name | Ticker Symbol | |
| CIK 0000701939 | |||
| Series S000008267 | SDIT SHORT DURATION GOVERNMENT FUND | ||
| Class/Contract C000022552 | SDIT SHORT DURATION GOVERNMENT FUND - CLASS F, effective 1-31-2017 (formerly Class A) | TCSGX | |
| Class/Contract C000147419 | Class Y | SDGFX | |
| Status | Name | Ticker Symbol | |
| CIK 0000701939 | |||
| Series S000008269 | SDIT GNMA FUND | ||
| Class/Contract C000022554 | SDIT GNMA FUND - CLASS F, effective 1-31-2017 (formerly Class A) | SEGMX | |
| Class/Contract C000147421 | Class Y | SGMYX | |
| Status | Name | Ticker Symbol | |
| CIK 0000701939 | |||
| Series S000008270 | SDIT TREASURY FUND | ||
| Class/Contract C000022555 | SDIT TREASURY FUND - CLASS F, effective 1-31-2017 (formerly Class A) | SEPXX | |
IRS No.: 236756825 | State of Incorp.: MA | Fiscal Year End: 0131
Type: N-CSRS | Act: 40 | File No.: 811-03451 | Film No.: 171126370
