Futures and options are both derivatives: contracts whose value comes from an underlying such as NIFTY, a stock or a commodity. Both trade in lots on NSE, BSE and MCX, both have expiry dates, and both let you take a large position for a fraction of its value. They differ in one fundamental way. A futures contract is an obligation for both sides. An option is a right for the buyer and an obligation only for the seller. That single difference changes the risk, the cost and the behaviour of every trade.
What a futures contract is
A futures contract is an agreement to buy or sell the underlying at a fixed price on a fixed future date. The buyer (long) gains when the price rises and loses when it falls, point for point. The seller (short) has the opposite position. There is no premium: both sides deposit a margin with the broker, and gains and losses are settled every day (mark-to-market).
Because both sides are obligated, a futures buyer cannot simply walk away if the price falls, the way an option buyer can let an option expire. The position has to be closed at the market price, or settled at expiry. Index futures settle in cash; stock futures held to expiry are physically settled in shares, like stock options.
Index futures and stock futures in India have monthly expiries; the current month is the most traded. The futures price usually sits a little above the spot price, a gap called the premium or basis, which reflects interest costs to expiry minus expected dividends. It shrinks to zero by expiry.
The key differences
| Feature | Futures | Option buyer | Option seller |
|---|---|---|---|
| Nature | Obligation | Right | Obligation |
| Upfront money | Margin | Premium | Margin (premium received) |
| Maximum loss | Large, no fixed limit | Premium paid | Large, no fixed limit |
| Payoff shape | Straight line | Bent: flat, then rising | Bent: flat, then falling |
| Time decay | None (basis shrinks slowly) | Against you | In your favour |
| Volatility | No direct effect | Rising IV helps | Rising IV hurts |
| Expiries | Monthly | Weekly and monthly (index), monthly (stocks) | Same as buyer |
| Strikes | One price | Many strikes to choose | Many strikes to choose |
A worked example: the same view, three ways
NIFTY futures trade at 25,050 with NIFTY at 25,000. You expect a rise this month. Assume a lot of 75 units (check the current lot size on NSE).
- Buy one lot of NIFTY futures at 25,050. Margin blocked: often around one to one and a half lakh rupees (check with your broker).
- Buy one lot of the monthly 25,000 call at ₹320. Cost: 320 × 75 = ₹24,000.
- Sell one lot of the monthly 25,000 put at ₹270. Receive ₹20,250, with a margin similar to futures.
| NIFTY at expiry | Futures P&L (₹) | Bought call P&L (₹) | Sold put P&L (₹) |
|---|---|---|---|
| 24,400 | −48,750 | −24,000 | −24,750 |
| 25,000 | −3,750 | −24,000 | +20,250 |
| 25,320 | +20,250 | 0 | +20,250 |
| 25,800 | +56,250 | +36,000 | +20,250 |
The futures line rises and falls evenly. The call caps the loss at ₹24,000 but gives up the first 320 points of any rise. The sold put earns ₹20,250 in most outcomes but loses heavily in a fall, and never earns more however far NIFTY rises. Three bullish trades, three very different risks.
Options can rebuild a future
Buy the 25,000 call and sell the 25,000 put of the same expiry together and, at expiry, the combined position gains or loses exactly like a futures contract bought at about 25,050 (25,000 plus the 50-point gap between the two premiums). This is a synthetic future, and the price link between calls, puts and futures is called put-call parity. It is the reason option prices across a chain stay consistent with the futures price.
You can see the two legs on today's chain: compare the ATM call and put prices in the middle row.
Call minus put at the ATM strike, added to the strike, should land close to the NIFTY futures price for that expiry. If it does not, arbitrage traders quickly push it back in line.
Where options add something futures cannot
Futures can only bet on direction. Options can also bet on how much the price will move, regardless of direction. Buying a call and a put together (a straddle) profits from a big move either way; selling them profits from a quiet market. The market's estimate of that movement for NIFTY is shown below:
A futures trader has no way to trade this range directly. An options trader can choose strikes inside or outside it, or trade the straddle that sets it.
When traders use each
- Futures suit traders who want simple, direct exposure without time decay, for example a swing trade over two or three weeks, or hedging a stock portfolio by selling index futures.
- Bought options suit traders who want a capped loss, or who expect a fast, large move, accepting time decay as the cost.
- Sold options suit traders who expect the price to stay in a range and can handle large margins and occasional big losses.
- Combinations such as a futures position plus a protective option cap the futures risk at a cost.
Futures traders who want to hold past expiry must close and reopen in the next month, which is called rollover.
A simple way to choose is to ask two questions. First, how sure am I about timing? If the move might take weeks, time decay makes bought options costly, and futures or a longer-dated option fit better. Second, how much can I afford to lose on a bad gap? If the answer is "only a fixed amount", a bought option or a hedged position is the only structure that guarantees it.
Common mistakes
Costs differ too. Futures trades pay securities transaction tax on the sale value of the contract, while options pay it on the premium (and on intrinsic value for exercised options), so per trade options are often cheaper to trade but the bid-ask spread is usually wider. Tax rates and charges change, so check the current figures on NSE and with your broker; the trading costs guide explains each charge.
- Thinking futures are safer because there is no decay. Futures losses have no cap and can exceed the margin on a gap.
- Thinking options are safer because the loss is capped. True only for buyers, and a capped loss repeated often is still a large loss.
- Ignoring the basis. Futures usually trade above spot; buying futures pays that gap, which disappears by expiry.
- Using too many lots. Both instruments are leveraged; size by the contract value, not by the margin or the premium.
- Forgetting the expiry. A futures position does not roll itself. If it is not closed or rolled, it settles at the expiry price.