| Abbreviation | Definition |
|---|---|
| CHY | Chyron Corporation |
| CHZ | Chittenden Corporation |
| CI | Cigna Corporation |
| CIB | Bancolombia SA |
| CIC | Carson, Inc. |
| CIF | MFS Intermediate High Income Fund (formerly Colonial Intermediate High Income Fund) |
| CIHPA | Citicorp Capital III |
| CIK | Credit Suisse Asset Management, Inc. |
| CIL | MuniHoldings California Insured Fund I |
| CIN | Cinergy Corporation |
| CINPB | P S I Energy, Inc. Preferred B |
| CINPC | P S I Energy, Inc. Preferred C |
| CINPJ | P S I Energy, Inc. Preferred J |
| CIR | Circor International, Inc. |
| CIT | CIT Group, Inc. (now FDD) |
| CIV | Conectiv, Inc. |
| CIVA | Conectiv, Inc. Class A |
| CIVPB | Atlantic Capital I |
| CIVPC | Atlantic Capital II |
| CIVPD | DelMarVa Power Financing I |