| Abbreviation | Definition |
|---|---|
| CMMPB | Criimi Mae, Inc. Preferred B |
| CMMPF | Criimi Mae, Inc. Preferred F |
| CMO | Capstead Mortgage Corporation |
| CMOPA | Capstead Mortgage Corporation Preferred A |
| CMOPB | Capstead Mortgage Corporation Preferred B |
| CMP | Compass Minerals International |
| CMS | CMS Energy Corporation (formerly Consumers Power Company) |
| CMSPA | Consumers Energy Company Preferred A |
| CMSPB | Consumers Energy Company Preferred B |
| CMSPJ | Consumers Energy Company Preferred J Offering Trust I |
| CMSPK | Consumers Energy Company Preferred K Offering II |
| CMSPL | Consumers Energy Company Preferred L Offering III |
| CMU | Colonial Municipal Income Trust |
| CMV | Chase Capital IV |
| CMX | Caremark Rx, Inc. |
| CNA | C N A Financial Corporation |
| CNB | Colonial BancGroup, Inc. |
| CNC | Conseco, Inc. |
| CNCPF | Conseco, Inc. Preferred F |
| CNCPG | Conseco Preferred G Offering Trust VI |