The document provides information about key stock market indices in India, including the BSE Sensex and Nifty 50. It discusses what they are, how they are calculated, their objectives, and historical performance. Specifically, it notes that the Sensex is a market capitalization-weighted index of 30 large, well-established companies listed on the Bombay Stock Exchange. It aims to measure market movements, serve as a benchmark for fund performance, and facilitate index-based derivatives. The top sectors and companies in the Sensex by weight are also outlined.