| Abbreviation | Definition |
|---|---|
| NIBA | National Investment Banking Association |
| NIC | National Investment Capital |
| NIC | National Investment Center |
| NICA | Nicaragua Investment Conditionality Act |
| NICAP | National Investagative Committee Of Aerial Phenomena |
| NIDO | Net Investment Days Outstanding |
| NIF | Neighbourhood Investment Facility |
| NIFA | Nebraska Investment Finance Authority |
| NIFTI | National Investment Framework for Transport in Ireland |
| NIG | Non Investment Grade |
| NIIF | National Investment and Infrastructure Fund |
| NIIP | Net International Investment Position |
| NIMF | Nordic Investment Managers Forum |
| NIP | Neighborhood Investment Program |
| NIPC | Nigeria Investment Promotion Commission |
| NIT | National Investment Trust |
| NIT | No Investment Tournament |
| NMIZ | National Manufacturing and Investment Zone |
| NMIZ | National Manufacturing and Investment Zones |
| NMIZ | National Manufacturing Investment Zone |