When someone says "the market is up 200 points today," which market are they talking about? With dozens of indices tracking everything from banking stocks to pharmaceutical companies, it can be confusing to know what each one represents.
Stock market indices are the pulse-points of the market. They summarise the performance of a basket of stocks into a single number, giving investors a quick read on how a segment of the market is performing.
India has two major stock exchanges — NSE and BSE — and each maintains dozens of indices. This guide explains the most important ones and how you can use them in your investing journey.
A stock market index is a statistical measure that tracks the price performance of a selected group of stocks. The group is chosen based on specific criteria — it might be the largest companies by market cap, companies from a specific sector, or companies within a specific market cap range.
Indices serve three key purposes:
Most major Indian indices use free-float market cap weighting — meaning each stock's weight in the index is proportional to its freely tradeable market cap, not its full market cap. This prevents promoter-heavy companies from dominating index performance.
The flagship index of NSE, comprising the 50 largest and most liquid companies listed on NSE by free-float market cap. It covers 13 sectors and represents approximately 65–70% of the total free-float market cap of all NSE-listed companies. This is the primary benchmark used by fund managers, the base for options and futures trading, and the most widely tracked Indian index globally. As of early 2026, the Nifty 50 level is around 22,000–24,000.
The 51st to 100th largest companies by free-float market cap on NSE. Think of it as the "waiting room" for Nifty 50 — companies here are often promotions-in-waiting. The Nifty Next 50 has historically been more volatile than the Nifty 50 but has also delivered better long-term returns. Together, Nifty 50 + Nifty Next 50 = Nifty 100.
A combination of Nifty 50 and Nifty Next 50, covering the top 100 companies. This index maps perfectly to SEBI's "large-cap" universe. Many large-cap mutual funds use Nifty 100 Total Return Index (TRI) as their benchmark.
Companies ranked 101 to 250 by free-float market cap on NSE — the SEBI-defined mid-cap universe. With 150 stocks across diverse sectors, this index captures the growth story of India's emerging corporate champions. Mid-cap indices tend to outperform large-caps in bull markets and underperform significantly in bear markets.
Companies ranked 251 to 500 by free-float market cap. This index is highly volatile and best suited as a benchmark for small-cap fund managers. Individual small-cap stocks can deviate dramatically from the index.
The top 500 companies on NSE — essentially Nifty 100 + Nifty Midcap 150 + Nifty Smallcap 250. It covers approximately 96% of total NSE free-float market cap, making it the broadest benchmark available. Multi-cap funds often benchmark against Nifty 500.
One of the most actively traded indices globally, Nifty Bank tracks 12 of the most liquid banking stocks listed on NSE. Banks like HDFC Bank, ICICI Bank, Kotak Mahindra Bank, SBI, and Axis Bank have massive weight here. Bank Nifty is the most popular underlying for options trading in India, with enormous daily volumes. It is significantly more volatile than Nifty 50.
Tracks 10 IT companies — TCS, Infosys, HCL Technologies, Wipro, Tech Mahindra, and others. Highly sensitive to US economic conditions, dollar-rupee exchange rates, and global tech spending trends. Nifty IT often moves inversely to other sectors when the rupee weakens (exporters benefit).
Tracks pharmaceutical companies listed on NSE. Driven by US FDA approvals/rejections, domestic drug pricing policies, and global healthcare demand. A defensive sector that tends to hold up better during economic downturns.
Tracks automobile manufacturers and ancillary companies — covering cars, two-wheelers, commercial vehicles, and auto components. Highly cyclical and sensitive to interest rates, fuel prices, and consumer sentiment.
Fast-Moving Consumer Goods — Hindustan Unilever, ITC, Nestle India, Britannia, Dabur, and others. A defensive, stable sector that performs well when consumer spending is strong. Typically lower volatility than the broader market.
India's oldest and most famous index, launched in 1986 with a base of 100 in 1979. The Sensex tracks 30 of the largest, most financially sound companies listed on BSE. It is often the number reported on news channels when they say "the market is up/down X points." Sensex and Nifty 50 are highly correlated (90%+) since they both track India's largest companies.
Tracks the top 500 companies listed on BSE — the BSE equivalent of Nifty 500. Many mutual funds benchmark against BSE 500 TRI when they have a broad multi-cap mandate.
BSE's mid-cap index, broadly equivalent to NSE's Nifty Midcap 150, though the exact constituent count and selection methodology differ slightly.
BSE's small-cap index, covering hundreds of smaller listed companies. Very large universe and used as a benchmark for small-cap oriented funds on BSE.
For most purposes, NSE (Nifty 50) is the preferred benchmark for trading and passive investing in India, given its higher liquidity and larger options market. BSE (Sensex) is more historic and media-reported. Both tell you essentially the same story about large-cap India.
| Index Name | Exchange | No. of Stocks | What It Measures | Type | Flagship ETF / Fund |
|---|---|---|---|---|---|
| Nifty 50 | NSE | 50 | Top 50 large-cap companies | Broad Market | Nippon India ETF Nifty 50 / SBI Nifty 50 ETF |
| Nifty Next 50 | NSE | 50 | Rank 51–100 large-cap companies | Broad Market | Nippon ETF Nifty Next 50 |
| Nifty 100 | NSE | 100 | Top 100 large-cap (SEBI definition) | Broad Market | Kotak Nifty 100 ETF |
| Nifty Midcap 150 | NSE | 150 | Rank 101–250 mid-cap companies | Broad Market | Nippon India Nifty Midcap 150 Index Fund |
| Nifty Smallcap 250 | NSE | 250 | Rank 251–500 small-cap companies | Broad Market | Nippon India Nifty Smallcap 250 Index Fund |
| Nifty 500 | NSE | 500 | Top 500 companies (~96% of market) | Broad Market | Motilal Oswal Nifty 500 Index Fund |
| Nifty Bank | NSE | 12 | Most liquid banking stocks | Sector | Kotak Bank ETF / Nippon India ETF Bank BeES |
| Nifty IT | NSE | 10 | Top IT/software companies | Sector | Mirae Asset NYSE FANG+ ETF / Nippon ETF IT |
| Nifty Pharma | NSE | 20 | Pharmaceutical companies | Sector | Nippon India ETF Pharma BeES |
| Nifty Auto | NSE | 15 | Auto manufacturers and ancillaries | Sector | Mirae Asset Nifty Auto ETF |
| Nifty FMCG | NSE | 15 | FMCG consumer goods companies | Sector | Nippon India ETF FMCG |
| Sensex | BSE | 30 | India's 30 largest BSE companies | Broad Market | SBI ETF Sensex / HDFC Sensex ETF |
| BSE 500 | BSE | 500 | Top 500 BSE-listed companies | Broad Market | Mirae Asset BSE 500 ETF |
| BSE Midcap | BSE | ~150 | Mid-cap BSE companies | Broad Market | Motilal Oswal BSE Enhanced Value Index Fund |
| BSE Smallcap | BSE | ~750+ | Small-cap BSE companies | Broad Market | Various small-cap funds |
The key distinction you need to understand is between broad market indices and sector indices.
These include multiple sectors and companies across different industries — Nifty 50, Nifty 500, Sensex, and similar. Because they are diversified, they are less volatile and better represent the overall market direction. These are the right benchmarks for most investors.
Nifty Bank, Nifty IT, Nifty Pharma, Nifty Auto, Nifty FMCG — these track specific industries. They are much more volatile because all their holdings are in one sector, so sector-specific news (like an RBI rate change impacting all banks, or an FDA warning letter impacting pharma) can cause extreme index moves.
Sector ETFs and index funds allow investors to make thematic bets — if you believe Indian banking will outperform, you invest in a Bank ETF. However, sector concentration adds risk. Most advisors recommend sector exposure as a small tactical allocation, not a core portfolio holding.
Bank Nifty can fall 10–15% in a single day if there is a major banking crisis or negative RBI surprise. Before investing in sector ETFs, make sure you understand the specific risks of that sector and ensure it is not more than 10–15% of your overall portfolio.
You cannot buy an index directly — but you can invest in instruments that track it precisely:
These are regular mutual fund schemes that invest in all stocks of a chosen index in the same proportion. They are available with no Demat account needed — you can invest via platforms like Zerodha Coin, Groww, MFCentral, or directly with the AMC. Expense ratios are very low (0.1–0.3% for most index funds vs 0.8–1.5% for active funds).
ETFs trade like shares on the stock exchange — you buy and sell them through your Demat account at live market prices throughout the day. They are even slightly cheaper than index funds in most cases. The downside is you need a Demat account and must buy in market quantities (though Nifty 50 ETFs typically trade at ₹200–300 per unit, making them accessible).
For most new investors, a combination of a Nifty 50 index fund (core stability) and a Nifty Midcap 150 index fund (growth kicker) covers 250 stocks across all major sectors at very low cost. This beats most active funds over 10+ year horizons after accounting for fees.
For experienced traders, Nifty 50 and Bank Nifty futures and options are available on NSE. These are derivative instruments used for hedging and speculative trading — not appropriate for beginners. Options on Nifty expire weekly (every Thursday) and have enormous daily volume.
Indices are just the starting point. Learn how markets work, how to read companies, and how to build a portfolio that creates long-term wealth.
Read the Complete Stock Market Guide →