The rules at a glance
- Setup: sell an out-of-the-money call and an out-of-the-money put on the same expiry, about the same distance from the Nifty (400 points, about 1.6%, in the example)
- When: after the previous weekly expiry, for the next Tuesday's expiry, in a week with no big scheduled event
- Stop: buy back both legs if their combined premium doubles
- Take profit: buy back once about 75% of the combined premium has decayed, or hold to expiry if both stay far out of the money
- Risk: the loss is unlimited in both directions; size for a 4% move, not a normal week
How a short strangle works
You sell a call above the market and a put below it. You're betting that the Nifty stays in that range until expiry, not on which way it goes. Two things work for you: time decay, which eats both options every day, and any fall in volatility, which makes both cheaper. One thing works against you: a big move in either direction.
The profit is capped at the two premiums. The loss isn't capped at all: above the call strike the call loses money point for point, and below the put strike the put does. That shape, a flat top and two sides falling away, is in the diagram below.
The rules, step by step
1. Pick the week
Nifty weekly options expire on Tuesday. These rules sell for the next Tuesday's expiry after the previous one has passed, and skip weeks with a big scheduled event: RBI policy, the budget, election results, or a major global release. Sellers are paid for uncertainty, but a known event can move the market far more than a normal week.
2. Choose the strikes
Sell a call and a put roughly the same distance from the Nifty. In the example that's 400 points each side, about 1.6%. In the model, those strikes have deltas of about 0.17 (call) and −0.13 (put); many sellers use a delta range like that as a guide.
3. Set the stop before you sell
Buy back both legs if their combined premium doubles. In the example, the two sell for 59.90 together, so the stop is at 119.80.
4. Take profit early
Buy back once about 75% of the premium has gone (when the pair costs about 15.00), or hold to expiry if both strikes are still far away. The last few rupees of premium carry most of the risk of an expiry-day spike.
5. Don't fight a breakout
If the Nifty runs towards one strike, the stop will usually close the trade. Rolling the untested leg closer to collect more premium is a common adjustment, but it also moves your breakeven closer to the price. Test any adjustment rule on paper first.
Worked example
Profit or loss at expiry
| Leg | Strike | Premium | For one lot of 65 |
|---|---|---|---|
| Sell | 25,400 CE | 34.35 | 2,232.75 |
| Sell | 24,600 PE | 25.55 | 1,660.75 |
| Short strangle, 1 lot | |
|---|---|
| Net premium | ₹3,894 received |
| Maximum profit at expiry | ₹3,894 |
| Maximum loss at expiry | Unlimited |
| Breakeven at expiry | 24,540.10 and 25,459.90 |
| If the Nifty is 2% lower or higher at expiry | −₹2,607 |
| If the Nifty is 4% lower or higher at expiry | −₹35,107 |
| Stop: combined premium doubles | exit at about 119.80, a loss of about ₹3,894 plus slippage |
| STT on the two sales (0.15%) | ₹6 |
The breakevens are the strikes plus and minus the total premium: 25,400 + 59.90 and 24,600 − 59.90. Inside them the trade makes money at expiry; at a 2% move it's already losing, and at 4% the loss is about nine times the best case. That ratio is why the stop exists, and why many traders turn the strangle into an iron condor by buying protective options further out.
Strangle or straddle?
| Short strangle | Short straddle | |
|---|---|---|
| Strikes sold | Out of the money, both sides | At the money, both sides |
| Premium collected | Smaller | Much larger |
| Range that makes money | Wider | Narrower |
| Loss if the Nifty moves | Starts further away | Starts almost at once |
The straddle guide covers both the short and the long straddle.
Margin and costs
- Margin. A naked short strangle blocks a large margin, and more on expiry day, when an extra 2% extreme loss margin applies to short options. Hedging both sides cuts it sharply.
- STT of 0.15% on each premium you sell, plus brokerage, exchange charges and GST on every order. Four orders per trade (two to open, two to close) add up on small premiums.
Common mistakes
- No stop. The strangle's loss has no ceiling. Without a stop, one bad week can undo months.
- Selling too close to collect more. Bigger premiums come with breakevens closer to the price.
- Selling into events. High premiums before the budget or an RBI decision reflect the bigger move the market expects.
- Too many lots. Margin may allow more lots than your risk limit does. Size from the loss at a 4% move.
How to test it before you trade it
TradingView's Strategy Tester works on one chart at a time, so it can't test a multi-leg option strategy that sells new strikes every week. Testing an option strategy works differently from the chart strategies on this site.
- Check the shape with today's prices. Put the live premiums into the payoff calculator and note the breakevens, the maximum loss and the result if the Nifty moves 2% or 4%.
- Check the margin. Use your broker's margin calculator for the whole position. Hedged positions need much less than naked ones.
- Backtest on past option prices. Some Indian platforms, such as AlgoTest, let you test option strategies on historical Nifty option data. Include costs and slippage.
- Paper trade it first. Run the rules on paper for at least two or three months of weekly expiries, and record what the stop actually filled at on fast days.
- Keep a journal. Write down the entry, the exit, the reason and the result for every trade. A trading journal shows quickly whether your exits follow your rules.
With one trade per weekly expiry, 100 trades take about two years. Judge a selling strategy on a long sample: it can win for months and then give much of it back in one bad week.
Try it in the payoff calculator, and get the PDF
Open the short strangle in the free payoff calculator with these legs filled in, then type in today's premiums from your option chain to see the real breakevens and maximum loss. The PDF is a one-page cheat sheet with the rules, the payoff diagram and a checklist.
Nifty options and the rules in India
Nifty options trade on NSE and are legal for residents through a SEBI-registered broker. SEBI tightened the rules for index derivatives in stages: from 20 November 2024, weekly options on only one benchmark index per exchange, a minimum contract value of ₹15 lakh and an extra 2% extreme loss margin on short options on expiry day; from 1 February 2025, option premiums collected upfront. Since 1 April 2026, STT on options sold is 0.15% of the premium. Check your broker's current margin and charges before you trade.
The odds are worth knowing. SEBI found that 93% of individual traders in equity futures and options lost money over FY22 to FY24, and 91% did in FY25. Nothing on this page is advice about what the Nifty will do; it explains how the strategy works and what it risks.
Related strategies: Nifty option selling, straddle, iron condor, bull put and bear call spreads, opening range breakout, VWAP pullback. Build any of them in the payoff calculator. All 34 strategies are compared on one page on the trading strategies page.