The strangle, and the trade with a 90% win rate

The answer

A strangle means buying a call above the price and a put below it, both expiring on the same day. It costs less than a straddle and needs a bigger move to pay. Sold instead of bought, it becomes the most popular and most dangerous trade in retail derivatives, because it wins almost every month and loses many months of gains in 1 session.

Why this costs you money

There are 2 ways to lose here and they look nothing alike.

As a buyer, you lose slowly and completely. You buy a call 3% above and a put 3% below because the pair costs half what the straddle cost. What you have bought is 2 options that both need a large move to be worth anything, and most of the time neither gets there. The strangle's cheapness is not a discount. It is a lower probability, priced correctly.

As a seller, you lose in a way that feels impossible right up until it happens. You collect a small premium. You do it every week. You win 8 or 9 times out of 10, which builds a track record, which builds confidence, which builds position size. Then the market gaps, and the single loss is larger than the last 20 wins combined.

This second pattern is the reason this cluster exists. A 90% win rate is not a good strategy. It is a description of where the losses have been moved to. If you win 9 times out of 10 and each win is 1 unit and the loss is 15 units, you lose money. The win rate told you nothing at all.

How it works

A long strangle. Buy 1 out-of-the-money call and 1 out-of-the-money put, same expiry, different strikes.

• Upper break-even = call strike + total premium
• Lower break-even = put strike − total premium
• Between the 2 strikes at expiry, both legs are worthless and you lose everything you paid.

A short strangle. Sell the same 2 options and collect both premiums.

• You keep everything if the price finishes between the 2 strikes.
• Above the call strike your loss grows without limit.
• Below the put strike your loss grows until the underlying reaches 0.

Compare it with the straddle. A straddle costs more, breaks even sooner, and is the correct instrument when you expect a move but not a very large one. A strangle costs less, breaks even later, and is the correct instrument only when you expect a move much larger than the market does.

The distance between the strikes is the choice. Wider means cheaper for a buyer, safer-looking for a seller, and worse in both cases than it appears, because the market prices those wings using the same volatility forecast it uses everywhere else.

What it costs, and what it gives up

For the buyer. The cost is 2 premiums, and the thing given up is probability. An at-the-money straddle wins whenever the move is large. A strangle wins only when the move clears the strike and then the premium as well. You have bought a cheaper ticket for a less likely event.

There is a second, quieter cost. Out-of-the-money options are more sensitive to changes in implied volatility relative to their price. When volatility falls after an event, a strangle can lose a larger share of its value than a straddle would.

For the seller. The cost is not cash. It is 3 things.

Margin, tied up. The credit received is small relative to the capital blocked. The return on margin looks attractive precisely because the risk is not being measured in the same units.

The obligation to be right about magnitude, not direction. You do not need to know where it is going. You need to be sure it will not go far. Nobody can be sure of that.

The right to close. A short strangle can be closed only if somebody will sell those options back to you. On a fast day, the leg that has moved against you is the leg everybody else is also trying to buy.

Who is on the other side, and why they are willing to be there

For a long strangle, the other side is a short strangle, and the short strangle is where the money and the danger are. So ask the harder question: who is consistently on the profitable side of short-dated index option selling?

There is a documented answer, and it is not comfortable.

SEBI's studies of the Indian equity derivatives segment report that individual traders lose in the large majority, while proprietary trading firms and foreign institutional participants, trading largely through algorithms, record the offsetting gains. the figures in the September 2024 study and the January 2023 study. The money that individuals lose does not vanish. It is transferred.

Those firms are not taking your view. They are running inventory. They quote both sides, hedge continuously, hold positions for minutes, and operate at costs an individual cannot approach. When you sell a strangle, you are not competing with another individual. You are selling volatility to, or buying it from, a firm whose entire business is knowing what volatility is worth.

There is also a regulatory data point. In 2025 SEBI passed an interim order concerning a large international trading firm's activity in Indian index options around expiry, and impounded a substantial sum pending proceedings. the order details, the amounts and the current status, which may have changed. Whatever the eventual outcome, the order describes in detail how sophisticated participants operate in exactly the contracts where retail premium selling is concentrated. That description is worth reading before you sell your next strangle.

The maximum loss, as a number

For the buyer, the maximum loss is 100% of the premium, and unlike a straddle it is the most likely single outcome. Anything between the strikes at expiry produces total loss.

For the seller, there is no maximum on the call side. Work the arithmetic on an index near 24,000 with a lot size of 75. the current lot size.

• Sell the 24,500 call and the 23,500 put for a combined 150 points.
• Credit received = 150 × 75 = 11,250 rupees.
• Margin blocked might be around 1,50,000 rupees. current SPAN and exposure margin.

Now apply a 5% overnight gap upward, to 25,200.

• The call is worth 700 points at expiry. Loss = 700 × 75 = 52,500 rupees.
• Net loss = 52,500 − 11,250 = 41,250 rupees.
• As a percentage of the margin committed = about 27%, in 1 session.
• As a multiple of the premium received = 3.7 times.

Now apply a 10% gap, which has happened in Indian and American markets more than once.

• Loss on the call = 1,900 points × 75 = 1,42,500 rupees.
• Net loss = 1,31,250 rupees, which is about 87% of the margin, and 11.7 times the premium received.

There is no level at which this stops. The 10% figure is not the worst case. It is just a number chosen for the illustration.

The overnight gap is not an edge case for this strategy. It is the strategy's entire risk, concentrated into the hours when you cannot trade.

• Natural gas rose more than 20% intraday on 14 November 2018. the exact move.
• The US volatility index roughly doubled on 5 February 2018.
• The Nikkei 225 fell about 12% on 5 August 2024.
• Indian indices hit circuit limits and halted trading in March 2020.

Divide the maximum loss by the premium received. For most short strangles that number is between 5 and 30 before you even consider a tail event. Almost nobody computes it. It is the most important number in premium selling.

When it is genuinely reasonable to use

Buying a strangle is reasonable in 1 situation. You expect a move much larger than the implied move, you want the exposure cheaply, and you accept that the most likely outcome is losing everything you paid. Treat the premium as spent the moment you place the trade. If that feels wrong, the position is too large.

Selling a naked strangle is reasonable in almost no retail situation. Here are the conditions under which a professional does it, and all of them must hold.

1. The position is small enough that a 10% adverse gap is survivable and boring. Not painful. Boring.
2. There is a defined-risk version available and you have consciously rejected it. Buying wings turns the strangle into an iron condor and caps the loss. The cost is a smaller credit. If the smaller credit makes the trade not worth doing, the trade was never worth doing.
3. You have a rule for the loss, written before, that does not require the market to cooperate. "I will close at 2 times the credit" is a rule that fails in a gap, because there is no price at 2 times the credit. There was 200 points and then there was 900 points.
4. You are not doing it on expiry day for the extra decay. That is where the gamma is largest and where a 1% move produces the largest possible change in your position.

The decision rule. Before selling any strangle, compute maximum loss on a 10% adverse gap, divide by the credit received, and write the ratio on the ticket. If you would not accept losing that many months of premium in 1 morning, buy the wings or do not do the trade.

Try this now

Five minutes in your broker's strategy builder. Build it, read the numbers, do not place it.

1. Open the strategy or basket window and select the nearest weekly or monthly index expiry.
2. Add a short call about 2% above the current level and a short put about 2% below it. 1 lot each.
3. Read off 3 numbers the platform already displays: the net credit, the margin required, and the maximum loss. Most platforms show the maximum loss as unlimited or as a very large number.
4. Divide the margin required by the net credit.
5. Now change the strikes to something 5% away on each side and read the same 3 numbers again.

What you should see. The credit is a small fraction of the margin, often between 5% and 12% for a month. When you move the strikes further out, the credit falls much faster than the margin does. The trade that looks safer earns much less and still has no cap on its loss.

The number to keep is the maximum loss divided by the credit. Your platform will often refuse to display a maximum loss for the short call leg because there is not one. That refusal is the most honest thing on the screen.

Three real cases

1. OptionSellers.com, November 2018 — the account that went negative A managed futures firm sold options on natural gas for clients, describing the approach as an income strategy. On 14 and 15 November 2018 natural gas prices rose violently while crude fell. The positions could not be closed. Client accounts were wiped out, and because losses exceeded account values, clients were left owing money to the clearing broker. the reported figures and the outcomes of the subsequent arbitration and litigation. The firm's principal recorded a video telling clients the accounts were gone. Nothing about the strategy had changed. The market simply moved further than the model allowed for.

2. 5 February 2018, the volatility event — many months returned at once The US volatility index roughly doubled in a single session. An exchange-traded note designed to profit from falling volatility lost the great majority of its value and was terminated by its issuer within weeks. the termination date and the final redemption value. Separately, a mutual fund that sold options systematically lost the large majority of its value in the same episode and was liquidated, and the Securities and Exchange Commission later brought proceedings concerning its risk disclosures. the case details and dates. Both vehicles had multi-year records of steady gains before that week.

3. SEBI's interim order on index option activity, 2025 — who was on the other side SEBI passed an interim order concerning a large international trading firm's strategies in Indian index options and the underlying components around expiry, and impounded a substantial amount pending proceedings. the order, the sum, and the current status, which may have changed since. Read it not for the allegation but for the description of scale and method. It is the clearest public account of what an individual selling weekly index premium is actually trading against.

The question that resolves it

A novice asks: how often does this win? An expert asks: when it loses, how many wins does the loss consume? The first number is easy to find and tells you nothing. The second number decides whether the strategy has any value at all.

What would make this wrong

If short strangles were simply bad, no professional would sell options, and the volatility risk premium would not exist. It does exist, and selling it is a real business.

The honest limits.

The business works when 3 conditions hold: the position is small relative to capital, the loss is capped by owning wings or by hard limits, and the seller can survive several bad events in a row. Firms that do this successfully spend more effort on the second and third conditions than on choosing strikes.

And a strangle bought, rather than sold, is not a bad instrument. It is an honest, cheap, low-probability bet with a known and limited cost. The problem with buying strangles is not the structure. It is that people buy them in size, over and over, on events where the implied move already exceeds the historical move.

Carry this

• Maximum loss divided by premium received. Compute it before every premium sale.
• A high win rate concentrates losses. It does not remove them.
• A short strangle cannot be exited in the market that creates the loss.
• Buying the wings costs credit and converts an unlimited loss into a number. That trade is almost always worth making.

Knowledge check

Related

• The straddle
• The iron condor
• Buying options versus writing options
• Gamma, and why options near expiry get wild
• ← Options and derivatives