This project report by Mr. Vineeth V. Poliyath investigates the influence of foreign institutional investors (FIIs) on the Bombay Stock Exchange (BSE) from 2002 to 2012. It explores the correlation between FIIs' investments and stock indices, particularly focusing on the BSE Sensex as a representation of Indian markets. The study utilizes regression analysis and covers various factors impacting stock indices while emphasizing the significance of FII investment in the Indian capital market.