Strategy library · Options income
Short strangle: more room than a straddle, the same open-ended risk
By Anoop Thomas · Last updated
In short
A short strangle sells an out-of-the-money call and an out-of-the-money put on the same expiry, for example the Nifty 24,300 call and 23,700 put with Nifty at 24,000. You keep the full premium if Nifty expires between the two strikes. The breakevens sit at each strike plus or minus the total credit. Beyond them losses grow without limit, so the trade needs a stop or bought wings.
A strangle is a straddle with the strikes pulled apart. You sell a call above the market and a put below it, take in less premium, and give the index room to wander before you lose anything. That room is the appeal. The catch is the shape of the payoff: a small credit against an open-ended loss, so one sharp move can cost several times what a quiet week brought in.
It suits traders with a full lot’s margin and an exit plan they have tested. It doesn’t suit anyone planning to “adjust” out of every loser without having tested those adjustments. If you want the same idea with a known worst case, the iron condor adds bought wings. And as with any option selling, remember SEBI’s finding that about 93% of individual F&O traders lost money over FY22 to FY24.
The rules, step by step
A sensible starting template, not a proven system. Change any number, then test it before trusting it.
- 1
Setup
Nifty options on the nearest weekly expiry (Tuesday, as of November 2026). Choose strikes either a fixed distance from spot (300 points each side) or by delta (about 0.15–0.20). Pick one method and keep it fixed while testing.
- 2
Entry
At 9:30 am, sell one lot of the chosen call and one lot of the chosen put. Skip the day if the combined premium is under ₹100, because tiny premiums don’t cover costs and risk.
- 3
Stop-loss
Exit both legs if the combined premium rises to 1.5 times the credit. (Alternative to test separately: exit a single leg when its own premium doubles.)
- 4
Exit
Buy everything back once 60% of the credit has decayed, or at 3:15 pm on expiry day, whichever comes first.
- 5
Position sizing
Keep the loss at your stop within 1–2% of capital. With a ₹135 credit and a 1.5× stop, that loss is ₹67.50 × 65 ≈ ₹4,390 per lot before slippage.
- 6
Filters
No new positions on Budget or RBI policy days. Consider skipping when India VIX has risen sharply over the previous five sessions, with the threshold set by testing, not by feel.
Say it in plain English
Paste this into INDfolio’s AI strategy builder and it becomes a backtestable strategy.
On Nifty weekly options, at 9:30 am sell one lot of the call about 300 points above spot and one lot of the put about 300 points below spot, but only if the combined premium is at least ₹100. Exit both legs if the combined premium rises to 1.5 times what I collected, or take profit when 60% of it has decayed. Close everything by 3:15 pm on expiry day, skip RBI policy and Budget days, and keep the loss at the stop under 1% of capital.Backtest this free
Free plan · no card · NSE data included
Payoff at expiry: a 24,300/23,700 strangle, one Nifty lot
Hypothetical inputs: Nifty at 24,000. Sell the 24,300 call at ₹70 and the 23,700 put at ₹65. Credit = ₹135 × 65 = ₹8,775 (lot size 65 as of 2026). Breakevens: 23,700 − 135 = 23,565 and 24,300 + 135 = 24,435.
| Nifty at expiry | Call leg (₹) | Put leg (₹) | Net P&L per lot (₹) |
|---|---|---|---|
| 23,300 | +4,550 | −21,775 | −17,225 |
| 23,565 | +4,550 | −4,550 | 0 |
| 24,000 | +4,550 | +4,225 | +8,775 |
| 24,435 | −4,225 | +4,225 | 0 |
| 24,700 | −21,450 | +4,225 | −17,225 |
Illustrative premiums, not quotes and not a backtest; costs and slippage excluded. For comparison, the short straddle example collects ₹22,750 with breakevens 700 points apart, while this strangle collects ₹8,775 with breakevens 870 points apart.
Picking strikes: points, delta or premium
A fixed distance from spot (sell 300 points out) is the easiest to test and explain, but 300 points means something different when India VIX is 11 and when it is 22. Delta-based strikes (sell the 0.15–0.20 delta options) adjust to volatility on their own, which is why I prefer them for anything systematic. Premium-based selection (sell the strike nearest ₹50) also adapts, though on quiet days it pulls you closer to the money than you might like.
Whichever you use, the backtest has to pick the strike the rule would have picked at that minute, from the option chain as it stood then. Choosing strikes with hindsight is the easiest way to build a strangle that only works in the past.
The trending week is the real risk
Strangles lose on sustained one-way moves and on gaps. A 2% Nifty move from 24,000 is 480 points, which leaves the 24,300 call 180 points in the money. The example shows a 700-point move costing ₹17,225 per lot, about twice the credit. And because both legs are short, a jump in implied volatility can push the combined premium up before price has moved much.
Adjustment habits are the less visible risk. Rolling the untested leg closer to collect more premium feels like management. In a trending market it can turn a strangle into a straddle at the worst moment, with more exposure rather than less. If you adjust, write the adjustment down as a rule and backtest it like any other parameter.
Margin is lower than a straddle’s but not small. Zerodha’s SPAN calculator on 4 November 2026 (Nifty near 23,750, 17 November weekly) showed about ₹1.9 lakh for one lot with both strikes 300 points out. Buying 200-point wings on each side, which turns it into an iron condor, cut that to about ₹75,000. Expiry day adds SEBI’s extra 2% extreme-loss margin on short index options.
Tiny premiums are a cost trap
Selling a ₹20 call and a ₹20 put feels safe because both strikes are far away. The charges say otherwise. A round trip on one lot is four orders (₹80 of brokerage at ₹20 each) plus STT of 0.15% on the premium sold, exchange charges, GST and stamp duty: about ₹100 in all if you buy both legs back at ₹5. Add one point of slippage on each fill (₹260) and you’ve spent close to 14% of a ₹2,600 credit before the market has done anything.
That’s why the entry rule has a minimum-premium filter. Run your own numbers through the brokerage calculator before settling on a strike distance.
Testing a strangle on NSE history
You need historical option chains at minute resolution: enough to know which strike was 300 points out (or 0.16 delta) at 9:30 am on each day, and what it traded at when your stop would have fired. Daily closing prices can’t test an intraday stop.
Vary the distance (200, 300, 400 points, or 0.12–0.25 delta) and the stop multiple, and look for a broad region where results hold up rather than one sharp peak. Make sure the test window includes a big trending month. Walk-forward analysis helps here: choose parameters on one window, check them on the next, and repeat. INDfolio’s options backtester does this with the Indian cost stack included (we build it, so weigh that accordingly).
Educational content, not investment advice. The rules and numbers on this page are an illustrative template, not a backtest result or a recommendation. Derivatives carry a high risk of loss — SEBI’s own studies of F&O traders found that the large majority of individuals lose money. We build INDfolio AI, so weigh our view accordingly.
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