National Stock Exchange of India Limited (NSE) is the leading stock exchange of India, located in Mumbai, Maharashtra. It is world’s largest derivatives exchange in 2021 by number of contracts traded based on the statistics maintained by Futures Industry Association (FIA), a derivatives trade body. NSE is ranked 4th in the world in cash equities by number of trades as per the statistics maintained by the World Federation of Exchanges (WFE) for the calendar year 2021. It is under the ownership of some leading financial institutions, banks, and insurance companies.[5] NSE was established in 1992 as the first dematerialized electronic exchange in the country. NSE was the first exchange in the country to provide a modern, fully automated screen-based electronic trading system that offered easy trading facilities to investors spread across the length and breadth of the country. Vikram Limaye is the Managing Director and Chief Executive Officer of NSE.

National Stock Exchange has a total market capitalization of more than US$3.4 trillion, making it the world's 10th-largest stock exchange as of August 2021.[4] NSE's flagship index, the NIFTY 50, a 50 stock index is used extensively by investors in India and around the world as a barometer of the Indian capital market. The NIFTY 50 index was launched in 1996 by NSE.[6] However, Vaidyanathan (2016) estimates that only about 4% of the Indian economy / GDP is actually derived from the stock exchanges in India.[7]

Unlike countries like the United States where nearly 70% of the country's GDP is derived from large companies in the corporate sector, the corporate sector in India accounts for only 12–14% of the national GDP (as of October 2016). Of these only 7,400 companies are listed of which only 4000 trade on the stock exchanges at BSE and NSE. Hence the stocks trading at the BSE and NSE account for only around 4% of the Indian economy, which derives most of its income-related activity from the so-called unorganized sector and household spending.[7]

Economic Times estimates that as of April 2018, 6 crore (60 million) retail investors had invested their savings in stocks in India, either through direct purchases of equities or through mutual funds.[8] Earlier, the Bimal Jalan Committee report estimated that barely 1.3% of India's population invested in the stock market, as compared to 27% in the United States and 10% in China.[9][10][11][12]

Source : https://en.wikipedia.org/wiki/National_Stock_Exchange_of_India