--- title: "Indices & 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" --- [Path 01 3 of 5](/learn/path-1/)Indices & Benchmarks[Next 1.4](/learn/path-1/module-1-4-reading-financial-statements) ## 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](/learn/glossary#nifty-500) returned 24%, you lost. Not to a person, to an index. A rule based list of stocks that is reviewed 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. It works the other way in a bad year too. Over the two years to 9 October 2026 the [Nifty 50](/learn/glossary#nifty-50) fell 9.85% on price. A portfolio that fell 5% in that stretch lost money and still beat its benchmark. Uncomfortable, but that is the honest scorecard. Everything in systematic investing, every strategy, every factor, every back test, is evaluated against a benchmark. **[Alpha](/learn/glossary#alpha)** is the return above the benchmark, after adjusting for risk. That's the return a strategy has to earn to justify itself. Two years to Oct 2026: the headline index came last Price return, 9 Oct 2024 to 9 Oct 2026 1. Nifty 50**−9.85%** 2. Nifty 50**−9.85%** 3. Nifty 50**−9.85%** 4. Nifty 50**−9.85%** 5. Nifty 50**−9.85%** 6. Nifty 50**−9.85%** Source: NSE index closes, price only, dividends excluded. ## 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 written down by NSE Indices, a subsidiary of NSE, and published for anyone to read. That is the part I like most about indices. Nothing is hidden. Anyone can check whether the index did what it said it would do. [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 50 of the largest and most liquid companies on NSE. India's headline index, what every news channel quotes. Stocks50 Coverage53.7% of NSE free float (30 Mar 2026) ReviewSemi annual, March and September WeightingFree float market cap Base1000 (Nov 1995) ◆ NIFTY 500 India's Broad Market Index Top 500 companies across large, mid and small cap. The broad yardstick for any strategy that roams beyond the largest names. Stocks500 CoverageRoughly nine tenths of NSE free float ReviewSemi annual, March and September 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 companies with large promoter holdings, 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](/learn/glossary#free-float). The index only counts the publicly tradeable float. ## How Nifty stocks get added and removed NSE Indices reviews the Nifty 50 and Nifty 500 twice a year. The data window ends in January and July, and changes take effect from the last trading day of March and September, with about four weeks' notice. Here is what the Nifty 50 rules actually look at: 1 Tradability screening For the Nifty 50, a stock must be available in the F&O segment and must have traded on every day of the last six months. Illiquid stocks do not qualify. 2 Free-float market cap ranking Eligible stocks are ranked by six month average free float market cap. A newcomer must be clearly bigger than the smallest existing member, which stops names flipping in and out every review. The Nifty 500 ranks the top 500 by full market cap. 3 Listing requirement A company needs a minimum listing history before it is considered, with a faster route for very large new listings. Newly listed companies need a track record. 4 Corporate governance Securities suspended or under certain regulatory restrictions are excluded. It is a basic hygiene filter, not a quality screen. [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. 1. **Effective date**Last trading day of March or September: the new index is live. 2. **Effective date**Last trading day of March or September: the new index is live. 3. **Effective date**Last trading day of March or September: the new index is live. 4. **Effective date**Last trading day of March or September: the new index is live. ## 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 | ## What about Sensex? Sensex is BSE's equivalent of the Nifty 50: 30 large Indian companies, free float market cap weighted, with a base year of 1978 to 79 and a base value of 100. BSE launched it in 1986, nearly a decade before the Nifty 50. For practical purposes, Sensex and Nifty 50 move almost in lockstep. The [correlation](/learn/glossary#correlation) between their daily returns is consistently above 0.99, because the 30 Sensex names are mostly the biggest Nifty names. They measure the same thing, the performance of India's blue chip companies. **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 rules sound bureaucratic until you watch them play out twice a year. NSE announces the Nifty 50 changes about a month before they take effect at the end of March and September. One to three names usually rotate in or out in a typical cycle. The mechanic creates a price effect you can see. Every index fund and [ETF](/learn/glossary#etf) tracking the Nifty 50 must hold the new member at its index weight on the effective date, and must sell the leaver. That demand is known in advance, so traders buy the incoming name after the announcement and sell it to the passive funds on the last day. The leaver often sees the reverse. Studies of Indian index changes have found abnormal returns around these dates, though the effect has shrunk as more people trade it. For a long term investor the lesson is simpler: an index is not perfectly passive. Its buyers pay a small, hidden cost every time membership changes. ## The Nifty Next 50, an underappreciated middle ground Nifty Next 50 holds the 50 names ranked 51 to 100 by free-float market cap. One thing makes it useful and underused in personal portfolios. It is less concentrated at the top. On 30 September 2026 the five biggest Nifty 50 names made up 36.3% of the index. The Next 50 spreads its weight more evenly, so no single bank or conglomerate drives it. ## 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. The gap is roughly the dividend yield: on 8 October 2026 NSE showed the Nifty 50 yielding 1.24%. Over 20 years, 1.24% a year compounds into about 28% more money. It is not a rounding error. When evaluating a mutual fund or strategy, always compare against the **Total Return Index**. Comparing a fund that keeps its dividends against an index that throws them away flatters the fund. [SEBI](/learn/glossary#sebi) has required mutual funds to benchmark against TRI since February 2018. [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. On 30 September 2026 the top 10 stocks were 52.3% of the index, three of them, two private banks and one conglomerate, were 27.0%, and financial services as a sector was 37.5%. A handful of companies drive most of what the headline number does: Three stocks are 27% of the Nifty 50 Index weight, 30 Sep 2026 1. The other 42 stocks**53.18%** 2. The other 42 stocks**53.18%** 3. The other 42 stocks**53.18%** 4. The other 42 stocks**53.18%** 5. The other 42 stocks**53.18%** 6. The other 42 stocks**53.18%** 7. The other 42 stocks**53.18%** 8. The other 42 stocks**53.18%** 9. The other 42 stocks**53.18%** Source: NSE Indices, Nifty 50 factsheet, 30 Sep 2026. Weights change daily. 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. ## 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 written rules, often factors like momentum, quality or low volatility, to choose and weight stocks. | Factor premiums are well documented in research, including in India, but they come and go in cycles. Path 3 shows the evidence and the bad years. | ## The scoreboard: two years of Indian indices Numbers make this real. Here is how the main NSE indices did on price over the two years to 9 October 2026, a stretch that included a deep correction in early 2025 and a fresh slide in 2026. | Index | 2 year price return | Volatility (annualised) | Deepest fall | P/E on 9 Oct 2026 | | --- | --- | --- | --- | --- | | Nifty 50 | −9.9% | 13.2% | −15.6% | 19.3 | | Nifty Next 50 | −9.6% | 17.9% | −24.8% | 17.9 | | Nifty 500 | −7.3% | 14.2% | −16.2% | 21.6 | | Nifty50 Equal Weight | −5.5% | 13.6% | −15.1% | 23.0 | | Nifty Midcap 150 | −1.4% | 17.2% | −19.8% | 28.1 | | Nifty Smallcap 250 | −2.9% | 18.9% | −25.7% | 34.0 | Source: NSE index closes, 9 Oct 2024 to 9 Oct 2026, price only, dividends excluded. Volatility from daily changes; deepest fall is the largest peak to trough drop in the window. Three things jump out. The headline index was the worst of the lot. Equal weighting the same 50 stocks lost 4.4 points less than cap weighting them, because the biggest names had a poor run. And mid and small caps held up better on return but put you through deeper falls on the way. Pick the wrong benchmark and you can make almost any strategy look clever. ## A worked example: did your portfolio actually win? Say you hold a portfolio of 30 mid and small cap stocks. Over the two years to 9 October 2026 it is up 4% on price. You compare it with the Nifty 50, which fell 9.9%, and feel like a genius: 13.9 points of outperformance. Now use the right yardstick. Your stocks come from the mid and small cap space, so the fair benchmark is something like the Nifty Midcap 150 (−1.4%) or Smallcap 250 (−2.9%). Against those you are ahead by 5 to 7 points, before dividends. That is still good. It is just not 13.9 points good. And if your portfolio fell harder than 25.7% at its worst, you also took more risk than the index to earn it. Module 2.3 shows how to put a number on that. ## Common mistakes with benchmarks **Comparing with the wrong index.** A small cap portfolio against the Nifty 50 tells you about the size of the companies, not about your skill. **Comparing total return with price return.** Your portfolio collects dividends. Compare it with a TRI, or you hand yourself 1.5% a year for free. **Picking the benchmark after the fact.** Choose it before you invest and stick with it. Switching benchmarks when one looks better is the oldest trick in fund marketing. **Ignoring concentration.** Buying a Nifty 50 fund for "[diversification](/learn/glossary#diversification)" still puts more than a quarter of your money in three companies. **Myth**A Nifty 50 fund is fully diversified. **Fact**On 30 Sep 2026 three stocks were 27% of it and financial services 37.5%. It is diversified across 50 names, but your money follows a handful of them. ## How this shows up in RupeeCase Every RupeeCase strategy names its universe and its benchmark up front. The [Nifty 50 Equal Weight](/strategies/nifty-50-equal-weight) strategy holds the same 50 stocks as the headline index at about 2% each, so you can see the effect of the weighting rule on its own. The [Allcap](/strategies/allcap) strategy draws 50 names from the Nifty Total Market of about 750 stocks. Each strategy page shows its model, back tested history next to the Nifty 50, with the dates on the chart, so you can judge the comparison yourself. Which benchmark should I use for my own portfolio?The index that holds the same kind of stocks you hold, in its total return version. Large caps against the Nifty 50 or Nifty 100 TRI, a mix of sizes against the Nifty 500 TRI, mid caps against the Midcap 150 TRI. Why did the equal weight Nifty beat the normal Nifty 50 over these two years?Because the largest stocks, which dominate the cap weighted index, did worse than the average member. In other periods the giants lead and cap weighting wins. Neither is always better; Path 4 covers weighting in depth. Where do I find the official index rules and factsheets?NSE Indices publishes the methodology document, monthly factsheets and constituent lists for every Nifty index. BSE does the same for Sensex. What does Indices & Benchmarks cover?What Nifty 50 and Nifty 500 actually are, how they are constructed, and why your portfolio’s entire job is to beat them. It works through Why the benchmark is the most important number, What an index actually is, How free-float market cap weighting works, How Nifty stocks get added and removed and more. It is module 1.3 of Path 1, Market Foundations, about 13 minutes of reading, free. TTry it ## Indices & Benchmarks, in numbers. How much dividends compound over years Your numbers, the module's formula, nothing stored. 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) [Full calculator: Tracking error](/learn/tools/tracking-error-calculator) AApply it on RupeeCase ## Nifty 50 Equal Weight All 50 Nifty names, equal weight. The simplest card on the lineup. An index built on the rules this path teaches, entry level, lowest risk band on the lineup (resolved by the patcher at build time), held stock by stock in your own demat. Risk band: Moderate. [See the strategy](/strategies/nifty-50-equal-weight)[Sign up for RupeeCase](https://invest.rupeecase.com/signup?strategy=nifty-50-equal-weight) [CAGR16.4%Sharpe1.13Max DD−15.7%Minimum249000Model, back tested, as of 27 Apr 2026. Not client returns, not a promise.](/strategies/nifty-50-equal-weight) QQuick check ## 10 questions, 7 to pass. Pick an answer and the explanation appears. Your result stays on this device and counts towards the Path 01 certificate. CCheck yourself ## Path 01 so far. Your quick check results on this device, stop by stop. 1. [TPath test, 30 questionsNot yet](/learn/path-1/module-1-5-orders-costs-taxation#pathTestSection) 2. [TPath test, 30 questionsNot yet](/learn/path-1/module-1-5-orders-costs-taxation#pathTestSection) 3. [TPath test, 30 questionsNot yet](/learn/path-1/module-1-5-orders-costs-taxation#pathTestSection) 4. [TPath test, 30 questionsNot yet](/learn/path-1/module-1-5-orders-costs-taxation#pathTestSection) 5. [TPath test, 30 questionsNot yet](/learn/path-1/module-1-5-orders-costs-taxation#pathTestSection) 6. [TPath test, 30 questionsNot yet](/learn/path-1/module-1-5-orders-costs-taxation#pathTestSection) Explore next ## Put the module to work. * [GuideNifty 50 vs Sensex: what an index is, and how NSE and BSE build theirsHow NSE and BSE build their indices, why they move together, and where they differ.](/guides/nifty-50-vs-sensex) * [Blog noteThe index rewrites itselfCosts: MF, PMS, RupeeCase, a short note](/blog/2026-09-02-morning-the-index-rewrites-itself/) * [Blog noteThe bigger number is the smaller returnReturns and risk maths, a short note](/blog/2026-07-05-morning-total-return-vs-cagr/) Community ## Join my WhatsApp group. Scan the code, fillFill one short form, and join my WhatsApp group. Slides, sources, factsheets and the rebalance logs live there, and members join a daily Google Meet with me. [Sign up for RupeeCase](https://invest.rupeecase.com/signup) [Join the WhatsApp group](https://forms.gle/C6HMtM1Z2GfeocQV7) [One form, one group](https://forms.gle/C6HMtM1Z2GfeocQV7)Scan with your phone camera SSources ## Where the figures come from. 1. [SEBI circular on benchmarking mutual fund schemes against TRI (January 2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) 2. [SEBI circular on benchmarking mutual fund schemes against TRI (January 2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) 3. [SEBI circular on benchmarking mutual fund schemes against TRI (January 2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) 4. [SEBI circular on benchmarking mutual fund schemes against TRI (January 2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) 5. [SEBI circular on benchmarking mutual fund schemes against TRI (January 2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) 6. [SEBI circular on benchmarking mutual fund schemes against TRI (January 2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) 7. [SEBI circular on benchmarking mutual fund schemes against TRI (January 2018)](https://www.sebi.gov.in/legal/circulars/jan-2018/benchmarking-of-scheme-of-mutual-funds_37563.html) GTerms ## 8 terms from this module. [Nifty 50](/learn/glossary#nifty-50)India's headline large cap index: 50 of the largest, most liquid NSE stocks, free float weighted, base 1000 in November 1995. About 53.7% of NSE's free float market cap on 30 Mar 2026. [Nifty 500](/learn/glossary#nifty-500)India's broad market index: the top 500 companies across large, mid and small cap, roughly nine tenths of NSE's free float market cap. [Free float](/learn/glossary#free-float)Shares available for public trading: total shares minus promoter, government and locked in holdings. Used to set index weights. Market capShare price × total shares outstanding. Free float market cap is share price × publicly tradeable shares only. [Alpha](/learn/glossary#alpha)Return above what the benchmark delivered, adjusted for risk. The return a strategy has to earn to justify itself. [Beta](/learn/glossary#beta)Sensitivity of a portfolio's returns to the benchmark. Beta = 1.0 means it moves with the market. Total Return IndexIndex version that reinvests dividends. Higher than price return by roughly the dividend yield; SEBI has required it as the mutual fund benchmark since February 2018. SensexBSE's flagship 30 stock index. Free float weighted, base 100 in 1978 to 79, launched in 1986. Moves almost in lockstep with the Nifty 50. [All 91 terms in the glossary](/learn/glossary) [From the podcast archiveEP30: Sensex Expiry. Sell The Straddle. Brent CooledThe Tanmay Edge, 30 Apr 2026, graded 2/5](/podcast/episodes/2026-04-30)[Pillar guideIndian Markets14 modules across paths 1, 6](/learn/indian-markets) Education only, not investment advice. RupeeCase is a technology platform operated by QC Alpha Technologies Pvt Ltd; it is not a fund, a PMS or a SEBI registered investment adviser. Model returns are back tested and not a promise of future returns. Figures carry the date they were checked.