What are the Nifty 50 and the Sensex?
The Sensex (30 stocks, BSE) and Nifty 50 (50 stocks, NSE) are India’s benchmark indices — baskets that show how the overall market is doing.
An index is a basket of stocks bundled into a single number so you can see, at a glance, how the market is moving. India’s two headline indices are the Sensex — 30 large companies on the BSE — and the Nifty 50 — 50 large companies on the NSE. When the news says "the market rose 1% today," it usually means one of these.
The companies in an index are chosen to represent the broader market, weighted mostly by size (free-float market cap). Big names like Reliance, HDFC Bank, TCS, and Infosys carry the most weight, so their moves push the index the most. The list is reviewed periodically and stocks are added or removed.
You cannot buy "the Nifty" directly, but you can buy an index fund or ETF that tracks it. For most beginners, a low-cost index fund is the simplest way to own the whole market instead of betting on single stocks.
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Common questions
What is the difference between Nifty and Sensex?
Both track large Indian companies. Sensex is 30 stocks on the BSE; Nifty 50 is 50 stocks on the NSE. They move very similarly because they hold many of the same big companies.
Can I invest in the Nifty 50 directly?
Not the index itself, but you can buy a Nifty 50 index fund or ETF, which holds all 50 stocks in the same proportions and tracks the index closely at very low cost.