| Abbreviation | Definition |
|---|---|
| QOQ | Wild Oats Markets options |
| QPU | Biopure Corporation options |
| QQE | SED International Holdings options |
| QQK | Talk.com options |
| QQU | MedQuist, Inc. options |
| QQV | NASDAQ Volatility Index |
| QRI | QR Canada Capital, Inc. |
| QS | Quarter Share |
| QSC | Quebec Securities Commission |
| QSIP | Quarterly Systematic Investment Plan |
| QT | Quiet Trader |
| QTA | Quantica, PLC. (London Stock Exchange) |
| QTA | Quaterra Resources |
| QTE | Quote |
| QTQ | NATIONAL COMMERCE FINANCIAL CORPORATION Options |
| QTT | Quick Term Timing |
| QTT | Taro Pharmaceutical Industries Options |
| QTU | Semtech Corporation Options |
| QUJ | Quintus Corporation options |
| QUT | Travelocity.com Inc. options |