NIFTY 100 Stocks — 100 Companies

The NIFTY 100 is the combined large-cap benchmark of the National Stock Exchange — it holds the 100 largest Indian companies by full market capitalisation, which in practice means the NIFTY 50 plus the NIFTY Next 50 in a single index. Together these companies represent roughly two-thirds of the total market capitalisation of everything listed on the NSE.

Because it covers the top 100 names, the NIFTY 100 is the cleanest single measure of how large-cap India is performing. It moves very closely with the NIFTY 50 (the overlap in weight is substantial), but it captures a slightly wider slice of the market, including the "junior" large caps that are often the next to graduate into the NIFTY 50.

Constituents are selected from the NIFTY 500 universe by full market capitalisation, and the index is weighted by free-float market capitalisation — meaning only the shares actually available for public trading count towards a company's weight. This is why Reliance, HDFC Bank, ICICI Bank, Infosys and TCS dominate the index while smaller constituents barely move it.

NSE Indices reconstitutes the index semi-annually (typically effective in March and September), with companies added or removed based on updated market-cap rankings and liquidity filters. Because of the free-float weighting, financial services usually accounts for the single largest sector exposure, followed by IT and oil & gas.

The NIFTY 100 suits investors who want broad large-cap exposure with slightly more diversification than the NIFTY 50, without stepping into mid-cap volatility. It is a common core holding: lower risk than mid- or small-cap indices, but with returns that track the Indian market's biggest and most established businesses.

You cannot buy an index directly. The practical route is a NIFTY 100 index fund or ETF, or a NIFTY 50 fund if you are comfortable with slightly more concentration — both are available with very low expense ratios, and a SIP is the standard way Indian investors accumulate them.