Guide · Margin and collateral

Margin pledge and using liquid funds as collateral in India

Collateral is where retail traders quietly lose the plot. The mechanics look like plumbing, a pledge here, a haircut there, and most explanations stop at "pledge your shares to get margin." The parts that actually decide whether the arrangement helps you or bills you are the ones they skip: that the securities never leave your account after the 2020 reform, that a cash-component rule caps how far pledged shares can take you, and that a low haircut is a statement about volatility, not a promise of safety. This guide works through the mechanism the way an operations desk does, then the constraints that catch people, with the September 2020 reform and the 50:50 rule as the two facts most live articles get wrong or omit.

Before 2020: the loophole the reform closed

To understand the current pledge system you have to see what it replaced. For years, brokers took a broad power of attorney from clients and used it to move client securities into the broker's own pooled demat account to raise margin. Because everything sat in one pool under the broker's control, a broker could pledge those securities to banks and non-banking lenders to fund its own borrowing, and the client had no visibility that their shares were being used at all. The structure was legal on paper and dangerous in practice, and it failed publicly when a large broking scandal in 2019 revealed client securities pledged for the firm's own loans.

SEBI's response ran in stages: segregate client securities from the broker's own, bar pledging of client holdings for the broker's borrowing, and make the power of attorney optional rather than a condition of opening an account. The centrepiece was a new pledge mechanism, notified in February 2020 and made mandatory from 1 September 2020, that removed the pooled-account model entirely. The design principle is simple: your securities should never have to leave your possession to serve as your margin.

The post-2020 pledge and re-pledge chain

Under the current system nothing is transferred out of your name. You instruct a pledge on specific units in your demat account in favour of your broker. The depository, CDSL or NSDL, records that pledge as a lien against those units and sends you a confirmation step, an OTP or a verification link where you enter your details and approve. Only after you confirm does the pledge take effect. Your broker then creates a re-pledge of those same units to the clearing corporation, held in a designated client-securities margin account, so the collateral is ring-fenced as yours at every hop and cannot be diverted to the broker's own obligations.

What you receive in return is not the full market value. The clearing system applies a haircut and credits the remainder as collateral margin you can trade against. Throughout, you remain the beneficial owner: dividends, bonus issues and rights accrue to you, and the units show in your demat as pledged rather than gone. The one thing you give up is immediate saleability, because a pledged holding must be released before it can be sold, and that release settles through the depository, typically the next working day.

The confirmation step is worth dwelling on, because it is the hinge the whole reform turns on. When you request a pledge, the depository, not the broker, is what pushes the approval to you: a message with a link, or an OTP tied to your registered mobile and email, which you enter to authorise those specific units. A broker cannot manufacture that confirmation on your behalf, and it is short-lived, so an unapproved request simply lapses. Every pledge is therefore an affirmative act by the owner against named securities, which is the exact property the pooled power-of-attorney model lacked. The same OTP discipline applies to the re-pledge, so the securities cannot travel further down the chain without the owner's consent behind the movement.

Because ownership never moves, the corporate-action consequences are clean, and this is a point generic explainers skip. A dividend on a pledged share is still yours; a bonus or a rights entitlement still accrues to your account; a buyback or a merger still treats you as the holder. Pledging is a lien for margin, not a sale, so nothing about your economic interest in the security changes while it is pledged. What changes is only that the unit is encumbered: it is spoken for as collateral until you release it, and the depository will not let you sell an encumbered unit. That single restriction, saleability, is the entire price of using a holding as collateral under the current system.

The 50:50 cash-collateral rule most retail traders miss

Getting collateral is only half the problem. The constraint that surprises people is on the composition of margin, not its size. For futures and options, the framework requires that at least 50 percent of the total margin be met with cash or cash-equivalents, and no more than 50 percent from non-cash collateral such as pledged equity shares. This is not a broker preference; it is a market-wide rule, in force since 2022 and reaffirmed and tightened in the framework effective from April 2026. The reasoning is prudential: in a sharp fall, non-cash collateral loses value at exactly the moment the system needs to liquidate it, so a floor of genuine cash keeps the settlement system solvent under stress.

The operational consequence is the part to internalise. If your non-cash collateral exceeds your cash portion, the shortfall in the cash leg attracts an interest charge from your broker, levied on a daily basis at a rate the broker sets in line with market norms. You are not blocked from trading, but you pay to be out of balance, and that cost quietly erodes the arrangement. The blunt version: you cannot run an F&O position on 100 percent pledged shares. Half of the fuel has to be cash or something the system treats as cash.

Cash-equivalents and why liquid funds get pledged

The 50:50 rule would be onerous if "cash" meant only bare rupees sitting in the trading account earning nothing. It does not. The framework treats a set of low-risk instruments as cash-equivalents that count toward the cash leg: liquid funds, overnight funds, liquid ETFs, government securities, treasury bills, approved fixed deposits and bank guarantees. Because these are treated as cash-equivalent, a trader can pledge them to satisfy the cash side of margin rather than surrendering that capital to an idle balance.

That is the whole reason liquid funds are pledged so widely. Instead of leaving a large cash buffer doing nothing to meet the cash-component rule, a trader keeps the money invested in a liquid or overnight fund, pledges the units, and the post-haircut value counts as cash-equivalent collateral. The capital works in the fund while it simultaneously backs the margin. What upstream discipline this rewards, sizing the position from real risk and holding collateral in the right form, is exactly what the method we teach is built around, because the arrangement only helps a plan that was sound to begin with.

The tradeoffs are real and must be stated plainly. A liquid or overnight fund is not cash: its value can still move, if only slightly, which is why it carries a small haircut rather than none. Redemption is not instant, so converting units back to spendable cash takes time, and a pledge must be released before you can redeem or sell. Corporate and fund-level events, and periodic revaluation, can nudge the collateral value. None of this makes the approach unusable; it makes it something to understand rather than treat as free money. This guide does not quote or promise any fund return, and the low haircut is a signal of relative stability, not a guarantee.

The exact haircut percentages, and the precise list of eligible instruments, are set by the exchange and clearing corporation and revised over time, so treat every figure above as directional and verify the current numbers before you rely on them. What is stable is the ordering: cash-equivalents are discounted lightly, equities more heavily, and the more volatile the equity, the larger the haircut.

Haircuts, and how collateral is valued

A haircut is the discount the clearing system applies to the market value of collateral so that a fall in that value does not leave the system under-secured. If a security is worth a rupee amount today and might drop before it can be sold in a default, crediting its full value would be reckless, so the system credits less. The size of the haircut is a direct measure of how risky the collateral is judged to be: minimal for liquid and cash-equivalent instruments, larger for volatile equities.

Two operational details complete the picture. First, availability is not instantaneous: after you confirm a pledge, the collateral value typically becomes usable from the next working day, because the pledge and re-pledge settle through the depository overnight, often described as a T+1 availability. Second, collateral is revalued periodically as prices move, so the margin a holding provides is not fixed. A pledged equity that falls in price provides less collateral the next day, which can quietly push your non-cash portion above the cash portion and reopen the 50:50 problem without you placing a single new trade.

These two details compound in a way that catches the unprepared. Because the haircut is applied to a moving market value and re-marked, the collateral a share provides is really a moving figure, highest when you least need it and shrinking exactly when markets fall. And because topping up is a T+1 pledge, not an instant transfer, you cannot always plug a shortfall the same session that a revaluation opens it. The two facts together argue for holding the cash side comfortably above the 50 percent floor and for favouring low-haircut cash-equivalents in the collateral mix, so that a bad day does not simultaneously shrink your collateral and deny you the time to repair it. The discipline is to plan the collateral before the position, not after the margin call.

A labelled illustration of the 50:50 rule

Numbers make the composition rule concrete. The figures below are illustrative, chosen only to show how the arithmetic falls out, and are not a recommendation or a return claim. Suppose a total F&O margin requirement of ₹4,00,000. The rule wants at least half, ₹2,00,000, from cash or cash-equivalents, and allows at most half from pledged shares.

The tilted column is not a rule breach that stops you trading; it is a permitted-but-charged state. You keep the positions, and you pay daily interest on the cash-leg gap until it is closed. Pledging ₹80,000 of a cash-equivalent such as a liquid fund closes the gap while keeping that capital invested, which is the everyday use of the mechanism this whole guide describes.

Where this sits, and what it is not

Margin pledging is capital-efficiency plumbing, not edge. It changes the form your collateral takes, letting steady assets do double duty as margin and as invested capital, and it enforces a prudential mix so the system stays solvent when markets fall. It does not improve a single trade. The leverage that F&O margin unlocks magnifies losses exactly as it magnifies gains, and the reporting and peak-margin rules around intraday exposure exist precisely because that asymmetry hurts undisciplined accounts. Understanding the pledge chain, the cash-component rule and haircuts tells you how to hold collateral efficiently and safely; it says nothing about whether a position is worth taking. That judgement comes from the analysis and the risk sizing upstream of any of this.

Sources

Where the facts come from

• The post-2020 pledge and re-pledge mechanism. SEBI's pledge framework, notified in February 2020 and mandatory from 1 September 2020, replaced the power-of-attorney transfer model: pledged securities stay in the client's demat, a lien is marked via CDSL or NSDL, the broker re-pledges to the clearing corporation, and the client confirms by OTP. cdslindia.com
• The 50 percent cash-component requirement. SEBI's risk-management framework requires at least half of F&O margin in cash or cash-equivalents, in force since 2022 and reaffirmed in the framework effective April 2026, with a daily interest charge on any cash-leg shortfall. sebi.gov.in
• Cash-equivalents and haircuts. SEBI's comprehensive risk-management framework lists acceptable collateral and treats government securities, liquid and overnight funds and similar instruments as cash-equivalent with low haircuts, against larger haircuts for volatile equities, revised over time. sebi.gov.in
• Why the pre-2020 model was reformed. The pooled power-of-attorney structure allowed client securities to be pledged for a broker's own borrowing, exposed publicly by a 2019 broking scandal, which drove the segregation and pledge reforms. blogs.cfainstitute.org

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