--- title: "Nifty 50, 500 and Benchmarks | RupeeCase Learn" description: "What Nifty 50 and Nifty 500 actually are, how indices are constructed, what Sensex measures, and why your portfolio's job is to beat them." source_url: "https://www.rupeecase.com/learn/path-1/module-1-3-indices-and-benchmarks" --- Skip to main content [Learn](/learn)›[Path 1: Market Foundations](/learn/path-1)›Module 1.3 # Indices & Benchmarks What Nifty 50 and Nifty 500 actually are, how they are constructed, and why your portfolio’s entire job is to beat them. TK Tanmay Kurtkoti Founder & CEO, RupeeCase · QC Alpha ⏱ 13 min read ⟳ Updated 15 Jun 2026 ◆ Beginner ## Why the benchmark is the most important number Here is something most people don’t actually internalise: the stock market, as a whole, is not your competition. Other investors are not your competition. The benchmark index is your competition. If you earn 18% in a year but the Nifty 500 returned 24%, you lost. Not to a person, to an index. A machine-assembled list of stocks that rebalances itself twice a year. You underperformed doing nothing by 6 percentage points. If you earn 10% in a year but the Nifty 500 returned 4%, you won. By 6 points. Against a passive list. Everything in systematic investing, every strategy, every factor, every backtest, is evaluated in terms of its performance relative to the benchmark. **Alpha** is the return above the benchmark. That’s the only return that matters. ## What an index actually is An index is a weighted portfolio of stocks, designed to measure the performance of a specific segment of the market. The Nifty 50 measures India’s 50 largest and most liquid companies. The Nifty 500 measures the top 500. Every index has rules. Rules for which stocks qualify. Rules for how much weight each stock gets. Rules for when stocks are added or removed. These rules are documented by NSE Indices, a subsidiary of NSE, and published publicly. [NSE Indices, Nifty 50 official methodology](https://www.niftyindices.com/indices/equity/broad-based-indices/nifty-50) [NSE Indices, Nifty 500 official methodology](https://www.niftyindices.com/indices/equity/broad-based-indices/nifty-500) ◆ NIFTY 50 India’s Large-Cap Index The 50 largest and most liquid companies on NSE. India’s headline index, what every news channel quotes. Stocks50 Coverage~65% of market cap RebalancingSemi-annual WeightingFree-float market cap Base1000 (Nov 1995) ◆ NIFTY 500 India’s Broad Market Index Top 500 companies across large, mid, and small cap. The universe RupeeCase uses for strategy research and backtesting. Stocks500 Coverage~93% of market cap RebalancingSemi-annual WeightingFree-float market cap Sub-indicesNifty 100, 200, Midcap 150, Smallcap 250 ## How free-float market cap weighting works Both Nifty 50 and Nifty 500 are **free-float market cap weighted** indices. This is the most important technical concept in understanding how indices work. **Market cap** = share price × total shares outstanding. **Free-float market cap** = share price × shares available for public trading (excluding promoter holdings, government stakes, locked-in shares). ▼ Free-float vs total market cap, simplified Illustrative example Total shares: 100 crore Promoter holding52 cr Govt / strategic8 cr Free float (public)40 cr Index weight uses only free float If price = ₹2,500: Total mkt cap = ₹25,000 cr Free-float mkt cap = ₹10,000 cr Index weight uses ₹10,000 cr, not ₹25,000 cr Why free-float? Because you can only invest in what is available for public trading. Promoter-held shares are locked in and can’t be bought. A free-float weighted index only counts what you can actually own. This means large promoter-holding companies like [RILReliance](https://www.nseindia.com/get-quotes/equity?symbol=RELIANCE) have a smaller index weight than their total market cap would suggest, because a large portion is held by promoters and not in free float. The index only counts the publicly tradeable float. ## How Nifty stocks get added and removed The NSE Index Maintenance Sub-Committee reviews the Nifty 50 and Nifty 500 twice a year, in June and December. Here is what they actually look at: 1 Liquidity screening A stock must have traded on at least 90% of trading days in the past 6 months and meet average daily turnover thresholds. Illiquid stocks do not qualify. 2 Free-float market cap ranking Stocks are ranked by 6-month average free-float market cap. For Nifty 50, you need to rank in the top 50. For Nifty 500, the top 500. 3 Listing requirement The company must have been listed on NSE for at least 6 months (with exceptions for large IPOs). Newly listed companies need a track record. 4 Corporate governance Companies under regulatory action by SEBI, NSE, or exchanges are excluded. This acts as a basic quality filter. [NSE Indices, Full methodology document (PDF)](https://www.niftyindices.com/Methodology/Method_NIFTY_Equity_Indices.pdf) When a company moves from Nifty 500 to Nifty 50, or vice versa, every fund tracking the index must buy or sell the stock. This creates predictable price pressure around rebalancing dates. It is one of the reasons index-tracking strategies are not perfectly passive. ## The Nifty 500 sub-family The Nifty 500 universe is divided into sub-indices based on size. These sub-indices are important because they define what we mean by large-cap, mid-cap, and small-cap in India: | Index | Stocks | Size category | Typical usage | | --- | --- | --- | --- | | Nifty 50 | 50 | Large-cap (top 50) | Flagship benchmark, most liquid, ETFs and index funds | | Nifty Next 50 | 50 | Large-cap (ranks 51 to 100) | Large-cap exposure without the top 50 concentration | | Nifty 100 | 100 | Large-cap (top 100) | Nifty 50 + Next 50 combined | | Nifty Midcap 150 | 150 | Mid-cap (ranks 101 to 250) | Mid-cap benchmark; higher growth, higher volatility | | Nifty Smallcap 250 | 250 | Small-cap (ranks 251 to 500) | Small-cap benchmark; higher return potential, liquidity risk | | Nifty 500 | 500 | All of the above combined | Broad market benchmark; the RupeeCase universe | ◆ Why RupeeCase uses Nifty 500 The Nifty 500 gives the broadest investable universe while maintaining a liquidity filter. Small companies below rank 500 often have very low daily volume, your own order can move the price. By restricting to Nifty 500 stocks, every strategy backtested on **[RupeeCase](https://invest.rupeecase.com)** is testable in practice, not just on paper. Factor effects are also stronger across a broader universe. Momentum in Nifty 500 is more powerful than momentum in Nifty 50 alone. ## What about Sensex? Sensex is BSE’s equivalent of the Nifty 50, 30 large Indian companies, free-float market cap weighted, base date January 1979 (base value 100). BSE launched Sensex in 1986, making it older than Nifty by about a decade. For practical purposes, Sensex and Nifty 50 move almost in lockstep. The correlation between daily returns of Sensex and Nifty 50 is consistently above 0.99. They measure essentially the same thing, the performance of India’s blue-chip companies. 0.99+ Correlation between Nifty 50 and Sensex daily returns, virtually identical movement 1979 Sensex base year, BSE’s index is India’s oldest, going back further than Nifty **Which should you use as your benchmark?** Nifty 500 if you invest across large, mid, and small cap. Nifty 50 if you are comparing to large-cap ETFs. Sensex if you are comparing to BSE-based products. For systematic strategies that span the full universe, Nifty 500 is the right benchmark. ## What index reconstitution actually looks like Index methodology rules sound bureaucratic until you watch them play out twice a year. NSE rebalances Nifty 50 in March and September. The methodology is publicly available on NSE indices: free-float market cap rank over a six-month average, with eligibility filters around impact cost, F&O availability and listing history. Roughly two to four names rotate in or out of Nifty 50 in a typical cycle. The mechanic creates a measurable price effect. A name about to enter the index sees demand from passive funds tracking the index that must hold the new constituent at its index weight on the announcement date. Sellers come in just before the addition is final, buyers come in once the addition is locked. The reverse pattern shows up for deletions. Academic studies of Indian index inclusion show a typical 2 to 4 percent net return between announcement and effective date for the entering name. Active factor strategies often anticipate these moves through liquidity, momentum and free-float screens. Sensex follows a similar dance on its own calendar at BSE. The two indices do not always rotate the same names at the same time, which means a Nifty 50 ETF and a Sensex ETF can briefly diverge during a reconstitution window before realigning over the following weeks. ## The Nifty Next 50, an underappreciated middle ground Nifty Next 50 holds the 50 names ranked 51 to 100 by free-float market cap. Three things make it useful and underused in retail portfolios. First, it is structurally less concentrated than Nifty 50. The top five Nifty 50 names typically command 35 to 40 percent of the index. The top five Nifty Next 50 names are usually 20 to 25 percent. That diversification is real over a 5 to 10 year hold. Second, it is the natural farm system for Nifty 50 promotions. A Next 50 name that performs well migrates up to Nifty 50 on the next reconstitution, picking up passive demand on the way. The Next 50 has historically outperformed Nifty 50 over multi-year periods because of this pipeline effect, though with higher volatility and slightly worse drawdowns in stress. Third, it sits at the boundary between large-cap and mid-cap. Names move both ways, gaining and losing index status as they grow or stagnate. Watching the inclusion and deletion list each March and September is one of the simplest free signals for spotting which sectors and themes are genuinely scaling in India. ## How index returns are calculated A stock market index is a number. That number changes every second during trading hours as constituent prices move. The formula is straightforward: ▼ How index value changes day to day NSE Indices methodology Index Value = (Sum of free-float market cap of all constituents) ÷ Divisor The **divisor** is a scaling factor set at inception and adjusted whenever stocks are added/removed or corporate actions occur. This keeps the index value continuous, a stock replacement doesn’t cause a jump. If Reliance rises 2% Its free-float mkt cap rises 2%. Nifty value rises by Reliance’s weight × 2%. If a stock leaves Nifty The divisor is adjusted so the index value doesn’t jump. Continuity is preserved. ## Price return vs total return indices This catches a lot of people out. There are two versions of every index: * **Price Return Index (PRI)**: Only tracks stock price movements. Dividends are not reinvested. * **Total Return Index (TRI)**: Tracks price movements AND assumes all dividends are reinvested back into the index. The Total Return version is always higher. For Nifty 50, the TRI has historically outperformed the PRI by roughly 1.5 to 2% per year, the approximate dividend yield of the index. When evaluating a mutual fund or strategy, always compare against the **Total Return Index**. Many fund managers quote their performance against the Price Return Index to make their returns look better. SEBI now mandates that mutual funds use TRI for benchmarking. [SEBI, Mutual Fund TRI Benchmarking Circular (2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) ## Top Nifty 50 weights, why concentration matters The Nifty 50 is not evenly weighted. The top 10 stocks typically account for over 55% of the index weight. This means a handful of companies drive most of the index’s returns: ▼ Approximate Nifty 50 top weights (illustrative) Approx. weights as of early 2026 · actual weights change daily Reliance ~8.7% HDFC Bank ~7.8% ICICI Bank ~6.8% Infosys ~5.6% TCS ~5.0% Bharti Airtel ~4.6% L&T ~3.8% Others (43) remaining ~57% This concentration is important for systematic investors because it means **beating the Nifty 50 essentially requires taking a different view on these mega-caps**. Many active funds find it hard to outperform because they are benchmarked against the Nifty 50 but hold similar large-cap stocks. The Nifty 500, being broader and less concentrated, gives factor strategies more room to work. Try it on RupeeCase See current Nifty 500 factor scores, momentum, quality, value and more Updated nightly. Backtest any factor strategy against Nifty 500 benchmark. [Start free →](https://invest.rupeecase.com/signup) ## Alpha, beta, and what you are actually trying to do Now that you know what an index is, two terms unlock immediately: | Term | What it means | Why it matters | | --- | --- | --- | | Beta | How much the portfolio moves when the index moves. Beta = 1.0 means it tracks the market exactly. | A beta above 1.0 means you amplify market moves (more risk). Below 1.0 means you dampen them. | | Alpha | Return above and beyond what the benchmark delivered, adjusted for beta. | This is the only return that matters. It is the evidence that your strategy actually works. | | Passive | Just hold the index. No alpha, no active decisions, exact beta of 1.0. | Guaranteed to match market performance minus a tiny fee. Hard for active strategies to beat consistently. | | Active | Try to pick stocks or time markets to beat the index. | The evidence shows most active funds fail to generate persistent alpha after costs. | | Systematic | Use rules-based factors to build portfolios that consistently overweight high-quality stocks. | Documented evidence of persistent alpha, especially in emerging markets like India. | ◆ The RupeeCase positioning on this Pure passive investing, buying a Nifty 500 index fund, is a perfectly valid choice and beats most active funds. But the academic evidence, and the evidence from **Indian markets specifically**, shows that systematic factor investing, momentum, quality, low volatility, has delivered consistent alpha over long periods. That is the gap **[RupeeCase](https://invest.rupeecase.com)** occupies: not guessing, not discretion, but documented factors applied systematically. We will go deep on this in Path 2 and Path 3. ## Key terms from this module Glossary, Module 1.3 Nifty 50India’s benchmark large-cap index. Top 50 companies by free-float market cap, maintained by NSE Indices. Base value 1000 (November 1995). Nifty 500India’s broad market index. Top 500 companies covering ~93% of market cap. The universe used by RupeeCase for strategy research and backtesting. Free-floatShares available for public trading, total shares minus promoter, government, and locked-in holdings. Used to calculate index weights. Market capShare price × total shares outstanding. Free-float market cap is share price × publicly tradeable shares only. AlphaReturn above what the benchmark delivered (adjusted for risk). The only return that proves a strategy actually adds value. BetaSensitivity of a portfolio’s returns to the benchmark. Beta = 1.0 means it moves exactly with the market. Total Return IndexIndex version that reinvests dividends. Always higher than price return. SEBI mandates TRI as benchmark for mutual fund comparison. SensexBSE’s flagship 30-stock index. Free-float weighted, base 100 from 1979. Moves in near-perfect lockstep with Nifty 50 (correlation >0.99). TK A note from the author The benchmark is not your enemy, it is your standard Early in my career I used to think about beating other traders. Then I realised that was the wrong frame. The only relevant question is whether what I am doing is better than passively holding the index. If not, I should save my energy and just buy the index fund. The benchmark makes everything honest. It forces you to measure. It forces you to ask “did my active decision add or destroy value?” Most investors never ask this question. Systematic investors ask it after every rebalancing. That is the difference. TK Tanmay Kurtkoti Founder & CEO, RupeeCase · 17 years systematic trading · QC Alpha RC **See how your strategy benchmarks.** RupeeCase backtests every strategy against Nifty 500 TRI, so you always know whether you are generating alpha, not just returns. [Explore terminal →](https://invest.rupeecase.com) #### Sources & further reading * → [NSE Indices, Nifty 50 official page](https://www.niftyindices.com/indices/equity/broad-based-indices/nifty-50) * → [NSE Indices, Nifty 500 official page](https://www.niftyindices.com/indices/equity/broad-based-indices/nifty-500) * → [NSE Indices, Full Equity Indices Methodology (PDF)](https://www.niftyindices.com/Methodology/Method_NIFTY_Equity_Indices.pdf) * → [BSE India, Sensex methodology and data](https://www.bseindia.com/indices/IndicesWatch.aspx?code=16) * → [SEBI, TRI Benchmarking Circular (2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) © All content on this page is original work by Tanmay Kurtkoti and QC Alpha Technologies Pvt Ltd. Protected under Indian copyright law and international IP conventions. Reproduction, adaptation, or commercial use requires written permission. Licensing: tanmay@rupeecase.com ### Quick check, Module 1.3 0 correct · 0 answered ✓ Module complete! Next module unlocked. 🎉 Module 1.3 complete 3 correct. Continue to Module 1.4 when ready. Complete all 5 modules in Path 1 → take the 30-question Path Test → earn your certificate. 🎓 Spread the knowledge This course is free. Help someone learn what Nifty actually is, share it. 📋 Suggested LinkedIn post, copy & paste Just completed Module 1.3 of Tanmay Kurtkoti's free investing course on RupeeCase. Learning how Nifty 50 and Nifty 500 are actually constructed, what free-float weighting means, and why the benchmark is the only number that matters. Free at rupeecase.com/learn Copy text Share on X Post on LinkedIn Copy link Research Lab Qualifier Path 1, Module 3 of 5 done, complete all 5 + path test to unlock [Explore terminal →](https://invest.rupeecase.com) ✅ 1.1 Markets→ ✅ 1.2 Stock Data→ 📍 1.3 Indices→ 1.4 Financials→ 1.5 Orders & Costs [← Previous](module-1-2-understanding-stock-data.html) Previous, Module 1.2 Understanding Stock Data Calculator ### TRI vs Price Return Gap Total Return Index reinvests dividends. Price index does not. Over decades the gap is large and meaningful. Annual price return (%)Annual dividend yield (%)YearsInitial investment (INR) Quick check, Module 1.3 ## 3 questions. Get 2 right to mark this module complete. 0 of 3 answered ✓ Module complete. Keep going. Up next, Module 1.4 Reading Financial Statements P&L, balance sheet, cash flow, the three statements every systematic investor needs to understand to evaluate a company. 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