| Abbreviation | Definition |
|---|---|
| ISL | Individual Stop-loss Limit |
| ISM | Issuer Set Margin |
| ISO | Indexed Stock Option |
| ISOP | Insured Security Option Plan |
| ISRA | Intermarket Symbols Reservation Authority |
| ISX | Israel Index of the CBOE (Chicago Board Of Exchange) |
| ITC | Investment Trust Company |
| ITF | In Trust For |
| ITM | Investment Trust Management |
| ITP | Intelligent Trading Positioner |
| IVA | Instability Visualization And Analysis |
| IWB | Independent Wholesale Brokerage |
| J | Junk |
| JASDAQ | Japan Securities Dealers Association |
| JASDAQ | Japanese Association of Securities Dealears Automated Quotation System |
| JASDAQ | Japanese Association of Securities Dealers Automated Quotation |
| JCSI | Joint Committee on Statutory Instruments |
| JDB | Junk Debt Buyer |
| JGB | Japanese Government Bonds |
| JSC | Joint Stock Company |