What is margin trading in India?

When you trade on margin, the exchange or intermediary requires you to deposit a percentage of the position's value as a good-faith deposit. That deposit is your margin. The rest of the exposure is effectively financed. Because you control a large position with a small amount of capital, your percentage profit or loss on that capital is amplified.

Margin is not a fee — it is collateral held against your obligations. If the position moves against you and your collateral falls below the required level, you face a margin call: a demand to top up funds or have the position closed.

In the F&O segment, margin is mandatory and set by the exchanges using risk models. It includes an initial span margin plus an exposure margin, and it rises automatically when volatility increases. SEBI has tightened intraday margin rules in recent years so that the required margin must be collected up front rather than extended loosely.

In the cash segment, the Margin Trading Facility (MTF) is a SEBI-regulated mechanism that lets you buy shares by paying part of the value and funding the rest, with the shares held as collateral. It carries interest on the funded portion and is governed by rules on eligible securities and haircuts.

Margin cuts both ways. A position five times your capital moves your equity five times as fast in either direction. A modest adverse move in the underlying can wipe out a large fraction of your margin, and a sharp one can take more than you deposited.

This is why margin is a high-risk facility, not a convenience. The same mechanism that makes a good outcome larger makes a bad outcome larger and faster. Many retail losses are not from being wrong about direction but from being over-leveraged when a normal pullback arrives.

If your collateral falls below the maintenance requirement, the intermediary can issue a margin call. If you do not add funds in time, your position can be squared off automatically — often at the worst possible moment, because forced selling tends to happen when the market is already moving against you.

Forced liquidation crystallises a loss you might otherwise have managed. Planning for margin calls — by keeping a buffer and sizing positions conservatively — is part of using the facility responsibly, not an optional extra.

Margin trading is appropriate only for those with a tested method, a clear risk budget and capital they can afford to lose. Position sizing should assume the market will move against you before it moves in your favour. Keeping leverage well below the maximum on offer leaves room to survive normal volatility.

It is worth remembering the broader context: in the F&O segment, where margin and leverage are central, SEBI's data shows roughly 93% of individual traders lost money in FY24. Margin does not improve those odds — it raises the stakes on whatever edge, or lack of edge, you bring.