| Abbreviation | Definition |
|---|---|
| CML | The Capital Market Line |
| CMO | Central Money-markets Office |
| CMO | Collateralized Mortgage Obligation |
| CMP | Current Market Price |
| CMS | Creator Management System |
| CMT | Constant Maturity Treasury |
| CNQ | Canadian Notes and Queries |
| CNS | Continuous Net Settlement |
| CNX | CRISIL NSE 50 Index |
| COB | Commission des Opérations de Bourse |
| COBRA | Currency Options Bring Reward Alternatives |
| COE | Certificate Of Entitlement |
| COMEX | Commodity Exchange |
| COMEX | Commodity Exchange, Inc |
| CONE | Computer Organizations Of New England |
| COP | Call Or Put warrant |
| CORES | Computer-assisted Order Routing and Execution System |
| CORESF | Computer-assisted Order Routing and Execution System for Futures |
| CORESO | Computer-assisted Order Routing and Execution System for Options |
| COSI | Copenhagen Stock Exchange International |