Nifty 500 Index: Sector Weights, Returns and Tax Explained

What the Nifty 500 actually is

The Nifty 500 is a broad market index managed by NSE Indices Limited, the index arm of the National Stock Exchange. It tracks 500 companies selected from the eligible universe of stocks listed on the NSE, ranked by full market capitalisation. Because it spans large cap, mid cap and small cap names together, it captures roughly 92 to 96 percent of India's free float market capitalisation, which is why analysts treat it as one of the closest things to a single number for the whole Indian equity market.

It is important to be precise here. The Nifty 500 does not mean the 500 biggest companies measured at one fixed cut off. NSE Indices applies a buffer and liquidity rules, and the list is reconstituted twice a year (semi annual review with data cut offs at the end of January and the end of July). A stock must meet trading frequency and impact cost criteria to qualify, so a thinly traded company will not enter the index even if its market cap is large on paper. This matters for traders because index inclusion and exclusion can move a stock sharply on the rebalance date when index funds are forced to buy or sell.

The Nifty 500 sits at the top of a family. The first 100 names by market cap form the Nifty 100 (large cap), the next 150 form the Nifty Midcap 150, and the next 250 form the Nifty Smallcap 250. Add those three together and you essentially get the Nifty 500. That structure tells you something useful: a large part of the Nifty 500 by weight is the same big names you already know from the Nifty 50, while the long tail of 450 smaller companies adds breadth but very little weight.

Sector weights: where the money really sits

A common myth is that buying the Nifty 500 gives you an evenly spread bet across 500 firms. It does not. Because the index is weighted by free float market capitalisation, a handful of sectors and a handful of mega cap stocks dominate. Financial Services is by far the largest sector, usually somewhere in the 27 to 30 percent range. Information Technology, Oil and Gas, Fast Moving Consumer Goods, Automobiles and Healthcare make up most of the rest. The approximate weights below are illustrative and shift with every rebalance and with market moves, so always check the live factsheet on niftyindices.com before acting.

Two practical conclusions follow. First, the Nifty 500 is, in effect, a financials plus technology plus energy bet with a broad tail attached. If Indian banks have a bad year, the index will struggle no matter how well small caps do. Second, because the top 50 to 100 names carry the bulk of the weight, the Nifty 500 tracks the Nifty 50 fairly closely most of the time, with extra ups and downs added by the mid and small cap portion. When small caps rally hard, the Nifty 500 outperforms the Nifty 50, and when small caps crash, it underperforms.

How the index level is calculated

The Nifty 500 uses the free float market capitalisation method. For each company, NSE Indices takes the share price, multiplies by the total shares, then applies an Investable Weight Factor (IWF) that strips out shares locked away with promoters, governments and other strategic holders. Only the freely tradable float counts. The free float market caps of all 500 stocks are summed and divided by a base index divisor to give the published index level.

The base period is 1 January 1995 with a base value of 1000. So when the index reads, say, 22,000 (an illustrative level), it means the free float market cap of these 500 companies is about 22 times what the original basket was worth in 1995. There is also a Total Return Index (TRI) version that adds dividends back in. The plain price index understates real returns because it ignores the roughly 1 to 1.5 percent dividend yield, so for honest long term comparisons you should look at the Nifty 500 TRI, which is what good index funds are benchmarked against.

Historical returns: the honest picture

Over long horizons the Nifty 500 Total Return Index has delivered roughly 12 to 14 percent compounded annually, broadly in line with the Nifty 50 but with more swing because of the mid and small cap component. These are rounded, illustrative figures drawn from publicly reported index history, not a promise. The journey was far from smooth, and any year by year table makes that obvious.

The lesson for a trader or long term investor is that the average hides the pain. A 13 percent long run average sits on top of years where the index lost more than a third of its value. The mid and small cap tail amplifies both directions. That is exactly why people use the Nifty 500 for patient, systematic investing through SIPs rather than for short term timing, and why position sizing and a long holding period matter so much.

How to get exposure: ETFs and index funds

You cannot buy the index itself, and crucially there is no Nifty 500 futures or options contract. Unlike the Nifty 50, Bank Nifty, FinNifty and Sensex, the Nifty 500 is not available in the derivatives segment, so you cannot trade lots, strikes or weekly expiries on it. Exposure comes only through pooled vehicles that hold the underlying 500 stocks in index proportion.

• Index funds: open ended mutual funds that replicate the Nifty 500. You buy units at the day end NAV through any platform. Several AMCs run Nifty 500 index funds with expense ratios commonly around 0.2 to 0.5 percent for the direct plan.
• ETFs: exchange traded funds such as the Motilal Oswal Nifty 500 ETF trade live on the NSE through any SEBI registered broker, just like a stock. You need a demat account and you pay normal equity brokerage and STT.
• Fund of funds and smart beta variants: there are also factor versions such as Nifty 500 Value 50 or Nifty 500 Momentum 50, which tilt the basket. These are different products with different risk, not the plain Nifty 500.

For most retail investors a low cost direct plan index fund via a monthly SIP is the simplest route, because there is no demat or live pricing to manage and you avoid tracking the screen. Traders who want intraday flexibility prefer the ETF. Watch two things on any product: the expense ratio (lower is better for a passive fund) and the tracking error (how far the fund drifts from the index it claims to follow).

Worked example: tax and net gain on a Nifty 500 ETF

Numbers below are illustrative and rounded for clarity. Suppose you buy 2,000 units of a Nifty 500 ETF at Rs 100 per unit, a buy value of Rs 2,00,000. Two years later the ETF trades at Rs 130 per unit, so you sell for Rs 2,60,000. Your gross gain is Rs 60,000. Because the holding period is more than 12 months, this is a Long Term Capital Gain on an equity ETF.

Under the rules effective from 23 July 2024, equity LTCG is taxed at 12.5 percent on gains above the Rs 1.25 lakh annual exemption. Assume this is your only equity LTCG for the year. The first Rs 1,25,000 of long term gain is exempt, so only Rs 60,000 falls within the exemption and the whole gain escapes tax in this case. Tax payable is Rs 0 on the capital gain, plus you would have paid Securities Transaction Tax of 0.001 percent on the ETF buy and sell value (a few rupees each side) and small brokerage and exchange charges. Net gain stays close to Rs 60,000.

Now change the holding period. Suppose instead you sell after 8 months at Rs 130, a Short Term Capital Gain of Rs 60,000. Equity STCG is now taxed at a flat 20 percent (raised from the old 15 percent), with no Rs 1.25 lakh exemption. Tax is 20 percent of Rs 60,000 = Rs 12,000, plus 4 percent health and education cess of Rs 480, so about Rs 12,480. Your net gain drops to roughly Rs 47,500 before charges. The same trade, taxed very differently purely because you held it under a year. This single comparison is the strongest argument for holding equity index products beyond 12 months.

Tax rules you must get right (post Budget 2024)

For equity ETFs and equity oriented index funds tracking the Nifty 500, the current Indian capital gains rules are clear and have changed materially. Anything you read quoting 15 percent STCG or 10 percent LTCG above Rs 1 lakh is out of date. The correct, current figures are below.

• Short Term Capital Gains (held 12 months or less): taxed at a flat 20 percent, plus applicable cess. This replaced the older 15 percent rate.
• Long Term Capital Gains (held more than 12 months): taxed at 12.5 percent on gains above Rs 1.25 lakh per financial year, plus cess. This replaced the older 10 percent rate and the older Rs 1 lakh exemption.
• These rates apply to transfers made on or after 23 July 2024. Gains booked before that date followed the old rates.
• Dividends from the underlying stocks (if the product pays them out) are added to your income and taxed at your slab rate, with TDS applicable above the threshold.
• If you trade frequently as a business rather than invest, gains may be treated as business income and taxed at your slab rate. F and O trading specifically is treated as non speculative business income, not capital gains, but remember the Nifty 500 itself has no F and O contract.

Always confirm the latest position with the Income Tax department or a qualified tax adviser before filing, because thresholds and rates can be revised in any Union Budget. Keep contract notes and statements so your buy date, buy cost and sale value are documented for each lot.

Nifty 500 vs Nifty 50 vs the tradable indices

Traders often confuse the Nifty 500 with the indices they actually trade in the derivatives segment. The table below makes the difference concrete, including the current F and O lot sizes, which matter because a single lot represents a large rupee value.

So if your goal is to trade an index with leverage, weekly expiries and option strategies, you trade the Nifty 50, not the Nifty 500. If your goal is to own the broad market for the long run through a fund, the Nifty 500 is one of the best single instruments to do it. As a quick scale check, one lot of Nifty 50 at an illustrative level of 22,000 is 75 times 22,000, which is Rs 16,50,000 of notional exposure, so position sizing in the F and O indices is a serious matter even before you consider the Nifty 500.

Costs, rebalancing and SEBI oversight

The all in cost of holding a Nifty 500 product comes from three places: the fund expense ratio, tracking error, and your transaction charges. For a passive fund the expense ratio is the main drag, so a direct plan with a low ratio compounds noticeably better over a decade than a regular plan paying distributor commission. On an ETF you also pay brokerage, STT and exchange fees each time you trade, so frequent churning quietly erodes returns.

The index itself is reconstituted semi annually by NSE Indices using end January and end July data, with changes implemented shortly after. Stocks that no longer qualify are dropped and new qualifiers added, and the fund must mirror these changes, which is one source of tracking error. All of this sits under SEBI oversight. SEBI regulates the exchanges, the index provider, the AMCs and brokers, and sets disclosure norms so that index methodology, expense ratios and holdings are public. That regulatory layer is part of why a broad index fund is considered a relatively transparent way to hold Indian equities.

Common mistakes investors make

• Believing the Nifty 500 is evenly diversified. In reality financials, IT and energy dominate, and the top 50 names drive most moves.
• Comparing the price index to a fund's total return. Use the Nifty 500 TRI for a fair comparison, otherwise you understate true performance by the dividend yield.
• Ignoring tracking error and expense ratio when picking between two near identical funds.
• Trying to time the broad market with short holding periods, which triggers the 20 percent STCG instead of the gentler long term treatment.
• Confusing the Nifty 500 with the tradable indices and looking for options or lots that simply do not exist on it.
• Forgetting that the Rs 1.25 lakh LTCG exemption is annual and shared across all equity gains, not granted afresh per fund or per transaction.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to NSE Indices (Nifty Indices), NSE India, AMFI and Zerodha Varsity. Always confirm current rules, rates and contract specifications on the official source before you trade.