A long put is the simplest bearish option trade: you buy one put option. A put gives the buyer the right to sell the underlying at the strike price until expiry. NIFTY and other index options are settled in cash, so a put simply pays how far the index finishes below the strike.
You pay the premium up front, and that is all you can lose. If the price falls well below the strike, the put gains and you can sell it for a profit. If the price stays above the strike, the put expires worthless. For the basics of how a put works, see put options explained.
Profit at expiry = max(0, strike − price at expiry) − premium paid
Why traders buy puts
There are two quite different reasons:
- To bet on a fall. A trader expects NIFTY or a stock to drop and wants a limited, known risk instead of selling futures, where the loss on a rise has no limit.
- To protect holdings. An investor who owns shares buys puts as insurance. That use has its own guide: the protective put.
This guide is about the first: a long put as a standalone trade.
How the payoff works
- Above the strike: the put is worthless at expiry. You lose the full premium.
- Between the breakeven and the strike: the put has some value but less than you paid.
- Below the breakeven: each point the price falls adds one point of profit, until the price reaches zero (in practice, never for an index).
Breakeven = strike − premium paid
A worked NIFTY example
NIFTY is at 25,000 and you expect a fall over the coming week. You buy the 24,900 put (out of the money, below the current price) for ₹110. Breakeven is 24,900 − 110 = 24,790.
| NIFTY at expiry | Put worth | Profit or loss per unit | Comment |
|---|---|---|---|
| 25,300 | 0 | −110 | Price rose, full premium lost |
| 25,000 | 0 | −110 | No fall, full loss |
| 24,900 | 0 | −110 | At the strike, still worthless |
| 24,790 | 110 | 0 | Breakeven |
| 24,700 | 200 | +90 | Profit starts |
| 24,500 | 400 | +290 | Profit grows point for point |
| 24,200 | 700 | +590 | A sharp fall pays well |
With a lot of 75 units (check the current lot size on NSE or with your broker), the maximum loss would be ₹8,250 and a finish at 24,500 would make ₹21,750. NIFTY needs to fall about 210 points, around 0.8%, just to get back to zero.
Live example: put prices and the market's expected range
The put prices you would pay are on the right side of today's NIFTY option chain:
Puts at strikes above NIFTY are in the money and cost more; puts below it are cheaper but need a larger fall. Subtract each put price from its strike to see the breakeven.
It also helps to compare your breakeven with how far the market expects NIFTY to move by expiry:
If your breakeven sits outside the expected range, you are betting on a move bigger than the options market is pricing. That can happen, but it is the less likely outcome on an ordinary week.
Puts and fear: the volatility effect
Markets usually fall faster than they rise, and falls come with fear. When NIFTY drops sharply, implied volatility (and India VIX) jumps, so a put gains twice: from the fall itself and from higher IV. That is the good side.
The bad side is that out-of-the-money puts are normally priced higher than calls the same distance away, because big institutions buy them as insurance. This tilt is called the volatility skew. When a scare passes, IV falls fast and puts lose value quickly, even if the index has not bounced much. Buying puts after a big fall, when fear is already high, often means paying a top price. The IV crush guide explains this in detail.
Choosing the strike and expiry
- In the money puts (strike above the price) cost more and behave more like a short futures position.
- At the money puts have the most time value and decay fastest in rupees.
- Far out-of-the-money puts are cheap but pay only in a crash; most expire worthless.
- Expiry: a weekly contract is cheaper but leaves little time. A later expiry costs more but gives the idea room to work and decays more slowly per day.
Managing the trade
- Book profit into sharp falls. Falls often reverse quickly, and IV drops as soon as the market calms.
- Decide the exit before entering: a loss limit on the premium, or a price level that would prove the bearish idea wrong.
- If you expect only a moderate fall, a bear put spread lowers the cost by selling a lower put against the one you buy.
The strategy builder draws the payoff for any put you pick, at expiry and today, so you can see the effect of time and volatility before you trade.
Long put vs selling futures
A trader with a bearish view has two direct choices: buy a put or sell NIFTY futures. They behave very differently.
- Risk: a long put can lose only its premium. A short futures position loses one point for every point NIFTY rises, with no limit, and a gap up overnight can be painful.
- Cost: the put has a premium that decays every day. Futures have no time decay; you only pay charges and keep margin blocked.
- Size of move needed: futures profit from the first point of a fall. The put needs the fall to pass strike minus premium before it shows a profit at expiry.
- Margin: buying a put needs only the premium. Selling futures needs a much larger margin set by the exchange and your broker.
In short, the put buys peace of mind about the worst case and pays for it with time value. On a slow, grinding fall, futures often do better; on a sudden, sharp fall with rising fear, the put can do better because it also gains from higher volatility. Neither choice is better in every case. Many traders who want to stay bearish for weeks choose a later expiry put to reduce the daily decay, or a put spread to reduce the cost.
Common mistakes
- Buying puts after the fall has happened. Premiums are inflated by fear, and the bounce plus IV drop can hurt twice.
- Using cheap, far strikes as lottery tickets. They need a crash to pay.
- Holding through expiry day hoping for a fall. Time value goes to zero by the close.
- Fighting a strong uptrend. Repeated put buying against a rising market adds up to steady losses.
- Ignoring costs and bid-ask spreads. Far strikes and stock options can have wide spreads; check before you trade.