| Abbreviation | Definition |
|---|---|
| COSM | Common Open Service Market |
| COT | Commitment Of Traders |
| CPS | Cambridge Positioning Systems |
| CPU | Computer Parts Unlimited |
| CQS | Consolidated Quote System |
| CR | Counter Receipt |
| CRCE | Chicago Rice and Cotton Exchange |
| CRD | Central Registration Depository |
| CREST | Commercial Real Estate Structured Transaction |
| CRPC | Capital Region Planning Commission |
| CRSP | Center for Research in Security Prices |
| CRT | Charitable Remainder Trust |
| CRT | Currency Resilience Trading |
| CRV | California Redemption Value |
| CS | Common Stock |
| CSA | Canadian Securities Administrators |
| CSA/ACVM | Canadian Securities Administrators/Autorités canadiennes en valeurs mobilières |
| CSCC | Slovenian Central Securities Clearing Corporation |
| CSCE | Coffee, Sugar, and Cocoa Exchange |
| CSCE | Sugar and Cocoa Exchange, Inc. |