| Abbreviation | Definition |
|---|---|
| IRQ | Investment Rationalization Quotient |
| IRRC | Investor Responsibility |
| IRRC | Investor Responsibility Research Center |
| ISC | investment for social contribution |
| ISIG | International Student Investment Group |
| ISK | Investment Social And K |
| ISNI | Investment Strategy for Northern Ireland |
| ISPAT | Investment Support and Promotion Agency of Turkey |
| ISS | Institutional Shareholder Services |
| ISSRO | International Securities Self-Regulating Organization |
| ITCI | Investment Training and Consulting Institute |
| ITGI | Investment Technology Group Inc |
| ITI | International Trade and Investment |
| ITIC | International Trade Investment Center |
| ITIG | International Trade Investment Group |
| ITIOFD | In The Interest of Full Disclosure |
| ITPC | Investment and Trade Promotion Centre |
| ITV | Investment To Value |
| IUAL | Initial Unfunded Accrued Liability |
| IWIN | Infinity Wealth Investment Network |