Collateral Margin in India: Haircuts and the SEBI Pledge Framework

What Collateral Margin Actually Means

Collateral margin is the trading margin you unlock by pledging securities you already own, instead of putting up fresh cash. Suppose you hold long term shares of Reliance, an index ETF and some government bond ETFs. You believe in those holdings and do not want to sell them. By pledging them, the clearing corporation gives you a margin amount based on their value, and you can use that margin to sell options, hold futures or take intraday positions.

The key word is haircut. The clearing corporation never gives you the full market value as margin. It applies a discount, called the haircut or VaR margin plus ELM, to protect itself in case the security falls in price while it is being held as collateral. If a stock has a 20 percent haircut, then Rs 1,00,000 of that stock gives you only Rs 80,000 of usable collateral margin. The riskier and less liquid the security, the bigger the haircut.

Collateral margin is most useful for option sellers and futures traders in India, because those positions need large margins (often Rs 1 lakh or more per lot) that would otherwise sit idle as cash. By pledging an existing portfolio, you keep your investments working while also funding your derivatives margin.

The Haircut: Real Percentages by Asset Type

The haircut is not a number your broker invents. For approved securities, the clearing corporation (NSE Clearing or Indian Clearing Corporation) publishes a daily haircut for every eligible scrip, and the broker passes that on to you. The figures below are illustrative typical ranges as commonly seen in the Indian market. Always check the live list your broker shows, because haircuts change daily with volatility and SEBI categorisation.

Notice the split that matters most for traders. Liquid ETFs, liquid mutual funds, government securities and Tbills are treated as cash equivalents. Pure equity shares are non cash collateral. This distinction is the heart of the SEBI 50:50 rule covered below, so it is worth understanding before you pledge anything.

The SEBI Pledge and Re-Pledge Framework (1 September 2020)

Before September 2020, collateral worked through a dangerous practice. Clients transferred their shares into the broker pool account through a Power of Attorney, and the broker held them. Some brokers, most notably in the Karvy episode, misused those client shares for their own borrowing. SEBI ended this with a new pledge and re-pledge framework, mandatory from 1 September 2020.

Under the new system, your shares never leave your own demat account. Instead, you create a pledge in favour of your broker directly through the depository (CDSL or NSDL). The broker then re-pledges those same shares to the clearing corporation to get you margin. Every step is recorded at the depository, so the broker can no longer move your securities without your explicit approval and cannot pledge them for its own purposes.

The approval is the part you actually experience. When you pledge, you receive a link or message from CDSL (the edis or e-pledge page) or NSDL (SPEED-e), not from your broker, and you authorise it with an OTP sent to the mobile and email registered with the depository. No broker can complete a pledge without that depository OTP. This single change is why pledging today is genuinely safe in a way it was not before 2020.

• Step 1: You place a pledge request with your broker for chosen securities.
• Step 2: CDSL or NSDL sends you a pledge authorisation link directly.
• Step 3: You approve with an OTP on the depository page (not the broker app).
• Step 4: The broker re-pledges your shares to the clearing corporation.
• Step 5: Post-haircut collateral margin appears in your trading account, usually the same or next trading day.
• Step 6: To free the shares, you unpledge. Margin is removed and the shares are unencumbered again, typically by the next day.

The 50:50 Cash and Collateral Rule

SEBI does not let you run a derivatives book on pledged shares alone. At least 50 percent of the total margin for any F&O position must come from cash or cash equivalents, and the remaining 50 percent can come from non cash collateral such as pledged equity shares. If you breach this and your cash component falls short, the broker charges interest (commonly in the range of 0.05 percent per day, which works out to roughly 18 percent a year) on the shortfall.

Cash equivalents include actual cash balance, liquid ETFs, liquid mutual funds, government securities and Tbills. Pure equity shares are non cash. So if you pledge Rs 4,00,000 of stocks and have zero cash, you cannot use the full collateral for futures and options. You would need an equal value of cash or cash equivalents to use it all without penalty. This is the single most common surprise for new option sellers in India.

Worked Example: Pledging Reliance to Sell a Nifty Option

These numbers are illustrative and not a recommendation. Assume you hold 500 shares of Reliance at a market price of Rs 1,400, so a market value of Rs 7,00,000. Reliance is a liquid large cap, so assume a 20 percent haircut. Your usable collateral from these shares is Rs 7,00,000 multiplied by 0.80, which equals Rs 5,60,000.

Now you want to sell one lot of a Nifty weekly put. The Nifty lot size is 65. Suppose Nifty is near 23,000 and you sell the 22,800 put for a premium of Rs 80. The span plus exposure margin for one short Nifty option lot is roughly Rs 1,25,000 (this varies daily with volatility). Your Rs 5,60,000 of pledged collateral easily covers it, but the 50:50 rule applies: at least Rs 62,500 of that margin must be cash or cash equivalents. If all your collateral is equity shares, you should keep about Rs 62,500 as cash or pledged liquid ETFs to avoid the interest charge.

Premium collected at entry is 75 multiplied by Rs 80, which is Rs 6,000 credited to you. If Nifty stays above 22,800 at expiry, the option expires worthless and you keep the Rs 6,000 minus costs. If it expires in the money, your loss is the intrinsic value multiplied by 75. For example, if Nifty settles at 22,700, the put is worth Rs 100, you pay 75 multiplied by Rs 100 equals Rs 7,500, so net loss is Rs 7,500 minus Rs 6,000 premium equals Rs 1,500 before costs. STT on the sell leg of options is 0.1 percent of premium value, plus exchange, GST and stamp charges, so always net those out.

Tax and Cost Treatment You Should Not Ignore

Pledging itself is not a sale, so it does not trigger capital gains tax. Your long term shares stay in your name and continue to earn dividends and bonus or rights entitlements while pledged. That is one of the genuine advantages of collateral margin over selling and rebuying, which would crystallise tax and brokerage.

However, the trades you fund with that margin are taxed normally. F&O profits are treated as business income and taxed at your slab rate, not as capital gains. If you instead sell the underlying shares, equity short term capital gains are taxed at 20 percent and long term capital gains at 12.5 percent on gains above Rs 1.25 lakh in a financial year. So holding via pledge, rather than churning, can be more tax efficient for long term investors who also want trading margin.

• Dividends on pledged shares still come to you, the owner.
• Corporate actions like bonus and splits still accrue to you.
• Pledging and unpledging often carries a small flat fee per scrip plus GST (commonly around Rs 20 to Rs 35 plus GST per ISIN), so do not pledge and unpledge daily.
• Interest applies only on a cash shortfall against the 50:50 rule, not on the pledge itself.

Collateral Margin vs Other Margin Types

Traders often confuse collateral margin with the other margin terms thrown around by brokers. The table below separates them clearly so you know what each one funds.

Since SEBI fully phased in the peak margin rule by September 2021, brokers must collect 100 percent of the required margin upfront, with intraday snapshots checked through the day. This killed the old practice of 10x or 20x intraday leverage. Collateral margin helps here because pledged securities count towards meeting that upfront requirement, so you are not forced to keep huge idle cash.

Risks and Mistakes to Avoid

The biggest risk is that collateral is not free money. The shares you pledge can fall in value, and so can your trading positions, at the same time. If the pledged stock drops, your available margin shrinks, and a volatile day can push you into a margin call or even a square off by the broker. Over-leveraging on pledged shares is how many option sellers blow up in a single gap move.

A second mistake is ignoring the 50:50 cash rule and quietly paying interest on the shortfall every single day. A third is pledging illiquid mid caps and small caps with 40 to 50 percent haircuts, expecting full value. A fourth is forgetting that a sharp fall in the pledged scrip can trigger an additional margin requirement on the collateral itself, separate from your trade losses.

• Never deploy your full collateral. Keep a buffer for haircut increases and margin spikes on volatile days.
• Hold at least the SEBI mandated cash or cash equivalent component to avoid daily interest.
• Prefer liquid, low haircut securities (large caps, liquid ETFs, Gsec) for collateral.
• Do not pledge shares you may want to sell quickly, since unpledging takes about a day.
• Track corporate actions and expiry dates so a position is not stranded against shrinking collateral.

Sources and Further Reading

For the authoritative rules and live haircut lists, refer to SEBI, NSE India, CDSL and Zerodha Varsity. Margins, haircuts, lot sizes and STT rates change, so confirm the current numbers and your broker's approved securities list before you pledge or trade.

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.