Futures Trading in India: Contracts, Margin, Leverage, Expiry and Risk

One word separates futures from options, and it changes everything downstream, obligation. An option buyer can walk away and lose only the premium. A futures position holder is committed, in or out, gains and losses settled daily whether the move goes their way or not. This guide covers exactly how that obligation shapes margin, risk, and what actually happens at expiry, alongside a direct comparison against both options and plain cash-market investing.

What is a futures contract? How do futures contracts work in India?

A futures contract is an agreement to buy or sell a specific stock or index at a predetermined price on a specific future date, and unlike an option, it's a firm obligation, not a choice you can simply let expire. Whoever holds the contract at expiry, or closes it out earlier, is committed to that agreement, settled either in cash or through actual delivery depending on what's being traded.

Futures trade on NSE across major indices, Nifty, Bank Nifty among others, and a wide range of individual stocks, letting you take a position on price direction without paying the full value of the underlying upfront, covered next under margin.

What is lot size?

Lot size is the fixed, standardized quantity of the underlying asset that one futures contract represents, set by the exchange, not something you can adjust to a custom amount. You can't buy half a lot or a custom quantity, you trade in whole multiples of whatever lot size the exchange has set for that specific contract, which varies from one stock or index to another.

What is futures margin? Why is margin required for futures trading?

Futures margin is the collateral you must post to open and hold a futures position, typically a combination of SPAN margin and exposure margin set by the exchange, covering a portion of the contract's total value rather than the full amount. Margin is required specifically because a futures position is a firm obligation with leveraged exposure, your potential gain or loss is based on the full contract value, even though you've only put up a fraction of it as margin, so the exchange needs assurance you can cover losses if the trade moves against you.

This is fundamentally different from buying an option, where your premium payment is your full, complete cost and maximum possible loss, nothing further gets called for regardless of how the trade moves.

What is mark-to-market settlement?

Mark-to-market, or MTM, means your futures position's gains and losses get settled in cash daily, not just when you eventually close the position. If the market moves in your favor on a given day, that gain gets credited to your account. If it moves against you, that loss gets debited, and you may need to add funds to maintain your required margin, a process called a margin call.

This daily settlement is a genuinely important practical difference from options, where you simply pay your premium once upfront and face no further cash demands regardless of how the position performs day to day.

Can futures create losses greater than expected?

Yes, and this is worth stating plainly rather than glossing over. Because futures are leveraged, you're controlling a full contract's worth of exposure with only a fraction posted as margin, a significant adverse move can produce losses larger than your initial margin, requiring you to post additional funds to keep the position open or face it being closed out at a loss.

This is structurally different from buying an option, where your maximum loss is capped at the premium you paid, no matter how far the trade moves against you. A futures position carries no such cap on the downside.

What happens when a futures contract expires?

It depends on what you're trading. Index futures, Nifty, Bank Nifty, and similar, settle in cash, since there's no physical index to actually deliver, the difference between your contract price and the final settlement price gets paid or received in cash. Stock futures, if held all the way to expiry without being closed out earlier, settle through actual physical delivery of shares, a rule that's applied to stock derivatives in India for some years now, specifically to discourage using derivatives purely for speculation without ever intending to actually hold the underlying stock.

Most traders close out their futures positions before expiry specifically to avoid the mechanics of physical settlement on stock contracts, worth knowing this distinction exists before letting a stock futures position simply run to its expiry date.

Futures vs options?

The core distinction ripples through everything, futures carry symmetric, open-ended risk on both sides of the trade, while a bought option caps the buyer's risk at the premium, shifting the open-ended risk entirely onto the option seller instead.

Futures vs cash-market investing?

Cash-market investing means buying shares outright, paying the full price, and actually owning them, with dividend and voting rights attached, and no expiry, you can hold indefinitely. Futures give you price exposure without full ownership, no dividends, no voting rights, using leverage so you control a larger position with less capital upfront, but with a fixed expiry date and the daily cash demands of mark-to-market settlement.

Futures suit shorter-term, leveraged directional views or hedging an existing position. Cash-market investing suits genuine ownership with a longer time horizon, largely unconcerned with daily price settlement. Neither replaces the other, they solve different problems.

Understanding margin, mark-to-market, and expiry mechanics properly, before they're happening with real money, makes a real difference to how confidently you actually trade futures. Neostox's paper trading runs on live NSE and BSE market conditions across equities, futures, and options, letting you watch margin requirements and daily MTM behave in real time with virtual money before any of it involves real capital.