| Abbreviation | Definition |
|---|---|
| IPRE | Income Producing Real Estate |
| IPV | Independent Private Value |
| IPVP | Independent Private Values Paradigm |
| IQMS | Integrated Quotation Management Service |
| IQR | Investment Quality Ranking |
| IR | Installation Restoration |
| IR | Investor Relations |
| IRA | Institutional Reinvestment Account |
| IRA | Investor Retirement Account |
| IRIN | Investor Relations Information Network |
| IRS | Interest Rate Swap |
| IRV | Income Rate And Value |
| ISE | celand Stock Exchange |
| ISE | Iceland Stock Exchange |
| ISE | Imperial Stock Exchange |
| ISE | Irish Stock Exchange |
| ISE | Islamabad Stock Exchange |
| ISE | Istanbul Stock Exchange |
| ISEQ | Irish Stock Exchange Equity Index |
| ISITC | International Securities Association for Institutional Trade Communication |