FII stands for Foreign Institutional Investor. FIIs are investment entities such as overseas mutual funds, hedge funds, pension funds, insurance companies, and sovereign funds headquartered outside India that invest in Indian equities, debt, and derivatives through regulated routes.
FIIs bring foreign capital, help globalise markets, and are highly sensitive to global cues such as interest rates, inflation data, and geopolitical risks.
Example: A U.S.‑based pension fund buying shares of Reliance Industries and Infosys on the NSE is counted as an FII transaction because the investing institution is registered and operates outside India.