Short Strangle - A Wide Range, a Small Credit, Undefined Risk
Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026
In this lesson
Build a short strangle, state its maximum profit, maximum loss and break-evens, and explain why a high chance of a small gain does not make its undefined risk safe.
A short strangle is an options strategy that sells an out-of-the-money put and an out-of-the-money call on the same stock with the same expiration, collecting both premiums and keeping all of them if the stock finishes between the two strikes. The most it can make is the premium; the most it can lose is unlimited, because the short call has no ceiling.
It is the seller's side of the long strangle, and the wider cousin of the short straddle. Where Short Straddle needs the stock to stay near one price, a short strangle wins anywhere inside a range. That makes it popular with premium sellers, and it is also why its risk is easy to underestimate.
A short strangle has undefined risk. It collects a small credit and can lose many times that amount in a single large move. The short call's loss has no limit as the stock rises. The short put's loss stops only at zero: in this lesson's example, $45 x 100 minus the $53 credit, or $4,447. Brokers allow it only in margin accounts approved for uncovered options.
How does a short strangle work?
You sell a put below the stock price and a call above it, with the same expiration. If the stock stays between the strikes, both options expire worthless and you keep the whole credit. If it finishes beyond either strike, that option's intrinsic value eats into the credit and, past the break-even, turns the trade into a loss.
Worked example
Selling the XYZ 45/55 strangle
XYZ trades at $50. You sell one XYZ 45 put and one XYZ 55 call, both expiring in 30 days. Prices are Black-Scholes model values at 30% implied volatility and a 4.5% interest rate. Figures are per share x 100, before fees, bid-ask spreads and margin costs.
- Credit: $0.20 for the put plus $0.33 for the call, $0.53 per share, or $53.
- If XYZ finishes anywhere from $45 to $55: both options expire worthless. You keep the full $53.
- If XYZ finishes at $40: the put is worth $5.00. Loss: ($5.00 - $0.53) x 100 = $447.
- If XYZ finishes at $62: the call is worth $7.00. Loss: ($7.00 - $0.53) x 100 = $647, about 12 times the credit.
- Break-evens: $45 - $0.53 = $44.47 and $55 + $0.53 = $55.53.
Illustrative and hypothetical. The ticker and prices are invented for teaching, and the figures exclude commissions, fees, margin interest and taxes, which reduce real results. Past or hypothetical outcomes do not indicate future results.
Short XYZ 45/55 strangle at expiration: small credit, open-ended loss
Hover or tap the chart, or focus it and use the arrow keys, to read any price.
Open this trade in the free calculatorShow as table
What are the maximum profit, maximum loss and break-evens?
- Maximum profit: the total premium collected, $53 here, if the stock finishes anywhere between the two strikes.
- Maximum loss: unlimited on the upside; on the downside it is the put strike minus the premium, $4,447 here, if the stock falls to zero.
- Break-evens: the put strike minus the total premium, and the call strike plus the total premium: $44.47 and $55.53.
The OIC's short strangle guide states it the same way: the maximum loss is unlimited if the stock rises, and a very substantial loss could occur if the stock became worthless.
Why does a high chance of profit not make a short strangle safe?
A short strangle wins whenever the stock stays inside a wide range, which can be most of the time. But the payoff is lopsided: a small, capped gain on most trades, and a loss with no ceiling on a few. One bad outcome can erase many good ones.
In the example, one finish at $62 loses $647, as much as about 12 winning trades at $53 each. A finish at $40 loses $447, about eight. And these are not extreme moves: $62 is a 24% rise, the kind a single earnings report or takeover offer can produce overnight.
A $53 credit against the losses a big move can bring
Short XYZ 45/55 strangle at expiration
What can go wrong before expiration?
Like any short option, the strangle is marked to the market daily, and margin is recalculated with it. Suppose XYZ jumps to $55 the day after you sell. With 29 days left, buying the strangle back costs about $196 at 30% implied volatility, a loss of $143 on a $53 credit. If implied volatility also rises to 40%, it costs about $265, a loss of $212. A 10-point rise in implied volatility alone, with no move at all and no time passing, would put the seller about $69 behind.
So a short strangle can show a loss of roughly 2.7 to 4 times its credit while the stock is still inside its expiration break-evens. Sellers who manage these positions decide in advance when to close: at a set loss, at a set share of the credit captured, or a set number of days before expiration.
How can you cap the risk of a short strangle?
The direct way is to buy protection. Buying a put below the short put and a call above the short call turns the position into an iron condor, which has a defined maximum loss: the distance between a short strike and the protective strike beyond it, minus the net credit. Course 3's Iron Condor Explained lesson covers it in depth. The protection costs part of the credit, and in return the worst case has a number on it.
Other habits help, but none of them defines the risk:
- Exit rules limit losses in normal markets, but a stock can gap past any stop overnight.
- Smaller size keeps one bad outcome survivable. The Course 1 lesson Position Sizing explains how to size by dollars at risk; for an undefined-risk trade, that means deciding what move you will plan for.
- Event awareness. Know whether an earnings date or other scheduled event falls before expiration.
What do brokers require to sell a strangle?
The same as for a short straddle: a margin account, approval for uncovered option writing, and at least FINRA's minimum margin, which brokers can raise. Course 3's Ratio Spread Risk lesson covers those rules in detail. Either short leg can be assigned early, as with any American-style equity option.
Check your understanding
You sell the XYZ 45/55 strangle for $0.53. Where are the break-evens at expiration?
Show answer
$44.47 and $55.53: the put strike minus the $0.53 credit, and the call strike plus it.
XYZ finishes at $52. What is the short strangle's result?
Show answer
A $53 profit, the full credit. $52 is between the strikes, so both options expire worthless.
Why can a short strangle with a high chance of profit still be a dangerous trade?
Show answer
Its gains are small and capped, and its losses are not. In the example, one finish at $62 loses $647, about 12 times the $53 credit, and a larger move would lose more.
What does buying a further out-of-the-money put and call do to a short strangle?
Show answer
It turns it into an iron condor, which has a defined maximum loss, in exchange for part of the credit.
Key takeaways
- A short strangle sells an out-of-the-money put and call with the same expiration and keeps the full credit if the stock finishes between the strikes.
- Maximum profit is the credit; maximum loss is unlimited on the upside; break-evens are the put strike minus and the call strike plus the credit.
- It wins often but loses big: a $53 credit against a $647 loss at $62 in the XYZ example.
- Buying protective wings turns it into an iron condor with a defined maximum loss.
Common questions
What is the maximum loss on a short strangle?
There is no fixed maximum. If the stock rises above the call strike, the loss keeps growing with the stock. On the downside, the loss is limited but large: the put strike minus the premium collected, per share, if the stock falls to zero.
How do you calculate the break-evens of a short strangle?
Subtract the total credit from the put strike and add it to the call strike. A 45/55 strangle sold for $0.53 breaks even at $44.47 and $55.53 at expiration, before fees; beyond either one the loss grows with the move.
How do you limit the risk of a short strangle?
Buy a further out-of-the-money call and put as protection, which turns the short strangle into an iron condor with a defined maximum loss. Traders also use exit rules, such as closing when the loss reaches a set multiple of the credit, but a gap can skip past any exit.
Why does a short strangle need margin?
Its short call is uncovered. Brokers require a margin account and approval for uncovered option writing, and FINRA sets a minimum margin requirement that rises as the stock moves against the position.