| Abbreviation | Definition |
|---|---|
| YNW | New Inca Gold, Ltd. |
| YRI.TO | Yamana Gold, Inc. |
| YSE | Yerevan Stock Exchange |
| YTM | Yield To Maturity |
| Z | z |
| ZAQ | ZAQ, Inc. |
| ZBDF | Zero Bond Discounting Factor |
| ZBM | Bank of Montreal options |
| ZCK.TO | ZCL Composites, Inc. |
| ZCZ | Benchmark Electronic, Inc. options |
| ZFI.F | ZKB Finanz Vision, A. G. |
| ZFJ | Equitec Proprietary Markets, L. L. C. options |
| ZGK | Quiksilver, Inc. |
| ZGQ | Healtheon/ WebMD Corporation options |
| ZGY | Micron Technology, Inc. options |
| ZHZ | Heinz Company Adjusted Options |
| ZJW | Marvel Enterprises, Inc. options |
| ZKU | Reliant Resources, Inc. - 2005 Leap |
| ZMH | Zimmer Holdings, Inc. |
| ZMR.TO | ZARUMA Resources, Inc. |