Haircut in Indian Markets: VaR Based Collateral Margins

What a Haircut Actually Means in Indian Markets

A haircut is the cushion a lender or a clearing corporation keeps for itself. When you offer a security as collateral, nobody values it at the full screen price, because that price can fall before they are able to sell it. So they shave off a percentage and lend or give margin against the reduced figure. If 100 shares of a stock trade at Rs 1,000 each, the market value is Rs 1,00,000. With a 20 percent haircut, only Rs 80,000 counts. The Rs 20,000 gap is the haircut, and it is the safety buffer that protects the system if the stock gaps down before it can be liquidated.

In the Indian context, haircuts show up in two main places. The first is the Margin Trading Facility (MTF), where a broker funds part of your delivery purchase and the shares act as collateral. The second, far larger, is collateral for Futures and Options, where you pledge shares or ETFs to your broker, who repledges them to the clearing corporation, and you receive margin to trade derivatives without selling your holdings. In both cases the haircut decides how much real buying power your shares give you.

The crucial point that most generic explainers get wrong is the source of the number. Equity haircuts in India are not a single SEBI mandated table that stays fixed for years. They are recalculated daily by the clearing corporations using a statistical model, and the official list lives in the NSE approved securities and applicable haircut file that brokers download every day.

VaR Based Haircuts: The Real Method Behind the Number

For equities, the haircut is tied to the VaR margin, which stands for Value at Risk. VaR is a statistical estimate of the worst single day loss a stock is likely to suffer at a high confidence level, based on its recent price volatility. NSE Clearing computes a VaR margin rate for every approved stock daily, scales it so it covers a 99 percent confidence single day move, and then applies a multiplier and a floor. A stock that swings violently gets a higher VaR rate, and therefore a bigger haircut, because its worst day could wipe out a larger slice of value before liquidation.

On top of the base VaR margin, the system adds an Extreme Loss Margin (ELM) to cover moves beyond what VaR captures. For collateral valuation purposes, the haircut applied to a pledged equity is generally aligned with the VaR plus ELM percentage for that scrip, subject to a regulatory minimum. SEBI rules set a floor haircut of 20 percent for equity collateral in the F and O segment after the framework tightened, which is why even the steadiest blue chip rarely gives you more than roughly 80 to 88 percent of its value as usable margin.

Illustrative VaR Haircuts for Named NSE Stocks

The table below shows realistic, illustrative haircut bands for well known NSE securities. These are representative of how the approved collateral list typically ranks scrips: index ETFs and the most liquid large caps sit near the low end, broad large caps cluster in the mid teens, and volatile or smaller names climb higher. Treat the exact figures as examples, because the live VaR plus ELM number moves daily.

Notice the pattern. The Nifty ETF gives you the most buying power per rupee because a basket of 50 stocks almost never gaps as hard as any single name. Reliance, HDFC Bank, TCS and Infosys cluster in the low to mid teens. Tata Motors, despite being a large cap, carries a noticeably bigger haircut because its daily price swings are wider. This is the VaR model doing its job: more volatility means a bigger buffer.

Worked Example: Pledging HDFC Bank for F and O Margin

Suppose you hold 500 shares of HDFC Bank in your demat account, trading at Rs 1,600 each. You do not want to sell them, but you want margin to sell a Bank Nifty option spread. You pledge all 500 shares to your broker. The gross market value is 500 multiplied by Rs 1,600, which is Rs 8,00,000.

Apply an illustrative 13 percent haircut for HDFC Bank. The haircut amount is 13 percent of Rs 8,00,000, which is Rs 1,04,000. The collateral margin credited to you is Rs 8,00,000 minus Rs 1,04,000, equal to Rs 6,96,000. That is the figure that lands in your margin balance as non cash collateral.

There is a second rule you must respect. SEBI requires that at least 50 percent of the total margin for F and O positions comes from cash or cash equivalents, and only the rest can be non cash collateral like pledged shares. So this Rs 6,96,000 of pledged HDFC Bank value cannot fund a position on its own. If a Bank Nifty trade needs Rs 2,00,000 of total margin, you must bring at least Rs 1,00,000 in actual cash, and the pledged shares can cover the other Rs 1,00,000. Pledging stock does not remove the need for real cash, it only stretches it.

Worked Example: Selling a Bank Nifty Spread Against That Collateral

Now use the margin in a real Bank Nifty trade. Bank Nifty has a lot size of 30. Say the index is at 50,000 and you sell a weekly bear call spread: sell the 50,500 call and buy the 51,000 call, both with a 500 point gap. Assume you collect Rs 180 premium on the short 50,500 call and pay Rs 90 for the long 51,000 call. The net premium received per lot is Rs 90, which in rupees is 90 multiplied by the lot size 30, equal to Rs 1,350 credit per lot for one lot.

Because the spread is defined risk, the margin is small. A 500 point wide Bank Nifty spread risks at most 500 minus the net credit of 90, which is 410 points, or 410 multiplied by 15, equal to Rs 6,150 maximum loss per lot before costs. With the Rs 6,96,000 of pledged collateral and the matching cash, you could comfortably carry several such lots. If Bank Nifty expires below 50,500 on monthly expiry, both calls expire worthless, you keep the full Rs 1,350 credit per lot, less costs.

If the trade went the wrong way and Bank Nifty closed at 51,200 on expiry, the short 50,500 call is 700 points in the money and the long 51,000 call is 200 points in the money. The spread settles at its maximum 500 point width, you lose 500 minus the 90 credit, which is 410 points, or Rs 6,150 loss per lot before costs. This is why defined risk spreads are popular: the pledged collateral is never at risk beyond the capped spread width, unlike a naked short option.

Haircut Versus Margin Versus Leverage

These three words get muddled, so here is the clean separation. Haircut is the discount on the value of your collateral. Margin is the deposit the exchange demands to hold a position, made up of SPAN margin and exposure margin for F and O. Leverage is the multiple of buying power you control versus the cash you put down. A bigger haircut shrinks your effective collateral, which shrinks your leverage. They are linked but not the same thing.

• Haircut: applied to collateral value. Higher haircut means less usable margin from the same shares.
• VaR margin: the statistical worst day loss estimate that drives the equity haircut.
• ELM, the Extreme Loss Margin: an added buffer on top of VaR for tail moves.
• SPAN margin: the core exposure based margin for F and O positions, set by the clearing corporation.
• Cash component rule: at least 50 percent of F and O margin must be cash or cash equivalents, not pledged stock.

Put together, the chain looks like this. Volatility rises, so the VaR margin rises, so the haircut on your pledged stock rises, so your usable collateral falls, so your available margin falls, and a position that was comfortable yesterday can suddenly show a shortfall today even though you did nothing. That is the single most common surprise for traders who pledge volatile stocks.

What Pushes a Haircut Up or Down

The haircut on a given stock is not a guess. It moves with measurable features of that stock. Understanding the drivers helps you choose collateral that gives you stable, generous buying power rather than collateral that gets repriced against you at the worst time.

• Volatility: the biggest driver. A stock with wide daily swings has a higher VaR and therefore a higher haircut.
• Liquidity: thinly traded stocks are harder to sell in a crisis, so they get penalised with bigger haircuts or are dropped from the list.
• Index membership and free float: large, heavily traded index constituents like Reliance and HDFC Bank get lower haircuts.
• Surveillance and bans: stocks in F and O ban, or under additional surveillance measures, can see haircuts spike or acceptance withdrawn.
• Corporate actions: splits, bonuses, special dividends and rights issues can temporarily raise volatility and the haircut around the event.

This is why a diversified equity ETF such as a Nifty ETF is the most capital efficient collateral you can hold. A basket of 50 large caps simply does not move as violently as any single stock, so its VaR is low and its haircut is among the smallest on the list. Many active F and O traders deliberately park their long term capital in liquid ETFs precisely to get the cheapest, steadiest collateral.

Tax and Practical Points You Should Not Ignore

Pledging shares for collateral does not, by itself, trigger any tax. You still own the shares, you have not sold them, and no capital gain arises from a pledge. Tax only enters when you actually sell. If you sell the underlying shares, Short Term Capital Gains on listed equity held under a year are taxed at 20 percent, and Long Term Capital Gains above Rs 1.25 lakh in a year are taxed at 12.5 percent, after the 2024 changes. These rates apply to the shares, not to the act of pledging.

The F and O trading you do using that collateral is treated differently. Profits and losses from Futures and Options are business income, taxed at your applicable slab rate, not as capital gains. That means the Rs 1,350 credit from the Bank Nifty spread, if it is a gain, is business income, and your option trading costs and even a portion of related expenses can be set off as business expenses. Keep clean records, because the income tax treatment of F and O as a business is a frequent audit area.

Common Mistakes Traders Make With Haircuts

The mistakes are almost always about treating the haircut as a fixed, friendly number. It is neither. It is variable and it is conservative by design. Traders who plan their position sizing around the gross value of their shares, rather than the post haircut value, are the ones who get margin calls during volatile sessions.

• Sizing positions on gross share value instead of the post haircut collateral value.
• Pledging volatile or small cap stocks and being surprised when their haircut jumps and margin shrinks.
• Forgetting the 50 percent cash component rule and trying to fund F and O entirely with pledged stock.
• Assuming last week's haircut still holds, when the VaR number is recomputed every single day.
• Ignoring transaction costs on small option spreads, where STT and charges can swallow a thin credit.

A disciplined approach is simple. Pledge liquid, low haircut collateral. Always keep a cash buffer above the 50 percent requirement. Size F and O positions on the conservative, post haircut figure. And recheck your usable margin on volatile days rather than assuming yesterday's comfort still applies. A trading journal that records your margin usage and pledge value over time makes these patterns obvious.

Sources and Further Reading

For the authoritative, live numbers, refer to NSE India and the NSE Clearing approved securities and applicable haircut file, SEBI for the margin and collateral framework, and Zerodha Varsity for plain language explanations. The figures in this guide are illustrative. Always confirm current haircuts, lot sizes and tax rules on the official source before you trade, because they change frequently.

Sources and Further Reading

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