Nifty 50 is the National Stock Exchange’s (NSE) flagship index, tracking 50 of the largest, most liquid companies listed on NSE. It’s weighted by free-float market capitalization, meaning larger, more liquid companies influence its movement more than smaller ones. Launched in April 1996 with a base date of 3 November 1995, it’s the most widely used benchmark for the Indian stock market and also has among the most actively traded index Futures and Options contracts in India. Full index methodology is published by NSE Indices, the index’s official administrator.
Related Reading
See the full comparison with Sensex and Bank Nifty in Stock Market Indices Explained: Nifty 50, Sensex, and Bank Nifty.
Example
In a semi-annual review (cut-off dates 31 January and 31 July), a company that has grown large enough by free-float market cap can replace a smaller existing constituent — changes take effect only after four weeks' public notice, so the index always holds exactly 50 companies even as the names inside it shift over time.
Frequently Asked Questions
How many companies are actually in the Nifty 50 at any time?
Always 50 — when a new company is added during a review, an existing constituent is removed in the same review, so the index stays at exactly 50 stocks.
How often does the Nifty 50's composition change?
Via a semi-annual review with cut-off dates of 31 January and 31 July, based on the preceding six months of average data, with four weeks' notice given before any change takes effect.
What does free-float market capitalization weighting mean?
Only publicly tradable shares count toward a company's index weight — promoter holdings, government stakes, and other locked-in shares are excluded, so a company's total market cap isn't what determines its weight.