Foreign institutional investors (FIIs) are those institutional investors which invest in the assets belonging to a different country other than that where these organizations are based.

 Foreign institutional investors play a very important role in any economy. These are the big companies such as investment banks, mutual funds etc, who invest a considerable amount of money in the Indian markets. With the buying of securities by these big players, markets trend to move upward and vice-versa. They exert a strong influence on the total inflows coming into the economy.

Market regulator SEBI has over 1450 foreign institutional investors registered with it. The FIIs are considered as both a trigger and a catalyst for the market performance by encouraging investment from all classes of investors which further leads to growth in financial market trends under a self-organized system.