What is a short iron condor?
A short iron condor sells a put spread below the market and a call spread above it, same expiration. You collect both credits and keep them if price finishes between the two short strikes. Only one side can be breached, so the maximum loss is one wing width less the total credit.
Key takeaways
- The total credit from both spreads is the maximum profit and is fixed at entry.
- The maximum loss is the wider wing less the total credit — not the sum of both wings.
- There are two break-evens, one on each side of the range.
- The position profits from stillness; direction barely matters, size of movement does.
The question to answer before you open the trade: Is the range you expect genuinely narrower than the move the market has priced in?
A simple mental model: the water level between two marks
Picture the stream behind your house. Two marks are painted on the bank, a lower one and an upper one. A neighbour pays you 2 € for claiming that the water will stay between those two marks until Friday. You are not entirely sure, so further out you have piled up two small dams — one below the lower mark, one above the upper one.
Four things follow, and together they are the whole short iron condor:
- If the water stays between the marks, you keep the 2 €. That is the most you can ever make.
- If it runs past a mark, you start paying — and the further past it goes, the more you pay.
- Once it reaches one of your dams, your loss stops growing. How much higher it rises after that is no longer your problem.
- Whether it rises or falls does not matter. Only how far it moves matters.
Where the picture ends: unlike the stream, your position is repriced every day, not just on Friday. The mere expectation of heavy rain makes it more expensive to buy back — even though the water has not moved yet. And you can step out early instead of waiting for Friday.
How does a short iron condor work?
You get paid by time decay, on both sides at once. The position has four legs — the individual options that make up a combined trade. The two you sold carry the most time value, so the position as a whole decays in your favour every day price stays inside the range.
There is no meaningful direction driver here. The position is roughly delta-neutral at entry by construction, and it does not care whether price drifts up or down as long as it stays between the short strikes.
What works against you is movement — realised volatility, in either direction. This is the purest expression of that trade-off in the whole matrix: you are short movement and long stillness, and the market pays you a credit for taking that side.
If you remember one thing: you are being paid to say the range will hold. The credit is the price of that opinion, and the market sets it by pricing the move it expects.
How is a short iron condor constructed?
- +1 Put @K1
- -1 Put @K2
- -1 Call @K3
- +1 Call @K4
The two long options are the wings. They will usually expire worthless, and that is intended: their job is to bound the loss on whichever side gets tested, not to earn anything.
Worked example
An example stock trades at 100 €. You sell the 90/95 put spread and the 105/110 call spread, collecting a total credit of 2 € per share, so 200 € for the position. Both wings are 5 € wide.
Maximum profit: 2 € per share, or 200 € per contract — the total credit. You reach it whenever the stock finishes between 95 € and 105 €, where all four options expire worthless.
Maximum loss: −3 € per share, or −300 € per contract — the 5 € wing width less the 2 € credit. You reach it whenever the stock finishes at or below 90 €, or at or above 110 €.
Break-evens: 93 € and 107 € — the short strikes adjusted by the credit.
Your profit zone spans 14 € of the underlying, and you are risking 300 € to make 200 €. That is a much better-looking ratio than a single credit spread, and it is available because you have sold twice: the position wins in a wide band and loses only at the extremes.
When is a short iron condor worth it?
- Market phases it suits
- Goal
An iron condor belongs in sideways markets and in the calming phase after a volatility spike, and it wants high implied volatility — that is what pays you a credit worth having for strikes far enough out to be safe.
Its purpose is income and, in a specific sense, trading volatility: you are short implied volatility and short realised movement at the same time.
| Greek | Sign |
|---|---|
| Delta | 0 |
| Gamma | - |
| Theta | + |
| Vega | - |
Management
| Profit target | 50% of the credit |
|---|---|
| Loss limit | 2x the credit, or roll the tested side |
| Time rule | close at 21 DTE |
The 21-day rule is not optional here. With four legs and two short strikes, gamma risk in the final weeks is concentrated and asymmetric: a move that would have been harmless a month earlier can put a side deep in the money in a session. Closing at 50 % of the credit is the standard answer precisely because the last half of the credit is where nearly all the risk lives.
Assignment and capital
- Assignment risk
- medium on whichever side gets tested
- Capital required
- medium
- Typical expiration
- 30-60
- Typical delta
- Short Legs 0.10-0.20
The assignment risk is medium and lives on whichever short leg is tested. Both the short put and the short call can be assigned early; the long wing on that side remains, so the resulting position is bounded but does require the account to carry stock overnight.
The capital requirement is medium: the wider wing less the total credit is held as margin, the collateral your broker locks up while the position is open. Unequal wings therefore raise the margin, not just the theoretical risk.
What is the real return on an iron condor?
200 € of credit against 300 € of margin is 67 % on risk for the period — a headline number that explains a great deal about how this strategy gets sold. What it omits is that the losing outcomes are not rare; they are simply less frequent than the winning ones, and much larger.
The honest framing is that an iron condor trades a high win rate for a poor payoff ratio. Over a long enough series the expectancy depends almost entirely on how disciplined the sizing and the exits are, and hardly at all on how good the individual entries were.
What a short iron condor does not mean
- "Defined risk" does not mean "small risk". Defined only means you know the worst case in advance. Here it is 300 €, which is one and a half times the most you can make.
- Neutral does not mean opinionless. You hold a very specific view: that the move will turn out smaller than the market is currently pricing. That is still a bet, just not one about direction.
- Two sides do not mean double the risk. At expiration only one side can finish in the money, which is why the maximum loss uses one wing, not the sum of both.
- Your profit zone is not the gap between the short strikes. It runs from 93 € to 107 €, because the credit pushes both boundaries out by 2 €. Between 95 € and 105 € you simply collect the full maximum.
- A high win rate is not a result. Six wins of 200 € and one loss of 300 € make 900 €, not 1,200 €. What counts is win rate times win size against loss rate times loss size.
Which mistakes cost money on a short iron condor?
Sold as an income machine. A run of winning months invites larger position sizes, and one breached side at a larger size erases them. The strategy's shape — many small wins, occasional large losses — punishes exactly that behaviour.
Wings of unequal width, max loss calculated wrong. If the call wing is 10 € and the put wing is 5 €, the risk is 10 € less the credit. Sizing against the narrow wing understates the exposure by a factor of two.
Held through earnings. The premium is elevated before earnings because a large move is likely, not despite it. Holding through the event is selling insurance against the one thing you know is coming.
Feynman check: explain a short iron condor without jargon
Explain to someone in three sentences what you are actually doing. Do it without the words "credit", "strike", "vega" and "gamma".
Your explanation is complete when it contains four things:
- What are you betting on — and what are you betting against at the same time?
- Between which two prices does the stock have to finish for you to be in profit at all?
- Where exactly does your loss stop growing, and what makes it stop?
- Why does it not matter to you whether the price rises or falls?
One possible explanation: "I am paid today for claiming that the price stays inside a certain band until a set date. If it stays there, I keep the money in full. If it leaves the band in either direction, I have to pay — but I bought a boundary further out where my loss stops growing. The direction is irrelevant to me; only the size of the move counts."
If your explanation says the trade "wins most of the time" and is therefore good, that is exactly where the gap is. Go back to the worked example: you are risking 300 € to make 200 €, and the win rate alone says nothing about that.
Five questions before you enter
- How far would the stock have to move to reach my break-evens at 93 € and 107 € — and how often has it moved that far recently?
- Are both wings the same width, and am I sizing against the wider one?
- Does an earnings date or another known event fall inside the expiration window?
- How much of the credit do the bid-ask spreads on four legs eat before the trade even starts?
- What exactly will I do when one side is tested — and did I write that down before it happened?
Short Iron Condor or Bull Put Spread: what is the difference?
This data-driven table lays out the differences that actually matter between Short Iron Condor and Bull Put Spread.
| Criterion | Short Iron Condor | Bull Put Spread |
|---|---|---|
| Market phase | Range-bound, no trend, price oscillating between levels or After a volatility spike, with a return to normal expected | Range-bound, no trend, price oscillating between levels or Basing out, or a quiet upward drift |
| What pays you | Time decay | Time decay |
| Risk defined | Yes | Yes |
| Max profit | the credit received | the credit received |
| Max loss | the greater of the width of the put wing and the width of the call wing minus the credit received | the spread width minus the credit received |
| Capital required | medium | medium (spread width minus the credit received, held as margin) |
| Approval level | 3 | 3 |
In short: Short Iron Condor fits when the market phase is Range-bound, no trend, price oscillating between levels or After a volatility spike, with a return to normal expected and the goal is Income; Bull Put Spread fits when the market phase is Range-bound, no trend, price oscillating between levels or Basing out, or a quiet upward drift and the goal is Income.
Related strategies
These strategies solve a similar problem — the counter position is the inverse.
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Frequently asked questions
What exactly is an iron condor made of?
A bull put spread below the current price and a bear call spread above it, in the same expiration. You collect both credits. Only one side can ever finish in the money, which is why the maximum loss is one wing width less the total credit rather than two.
What is my maximum loss if the wings are different widths?
The wider of the two wings, less the total credit. This is the calculation people get wrong: an iron condor with a 5 € put wing and a 10 € call wing risks 10 € less the credit, not 5 €. Keeping the wings equal keeps the arithmetic simple and the risk symmetric.
How wide should the range be?
Wide enough that both short strikes sit outside the move the market has priced in for that expiration, and narrow enough that the total credit is worth the capital. Those two requirements pull against each other, and finding they cannot both be met is useful information about the trade.
Should I hold an iron condor through earnings?
Almost never. Earnings are precisely the event that produces the large single move an iron condor cannot survive, and the elevated premium beforehand is the market pricing exactly that risk rather than an opportunity being handed to you.
What do I do when one side is tested?
The options are closing the whole position, closing the tested side, or rolling that side further out. Each has a cost and none of them makes the loss disappear. Deciding which one you will use before the position is tested is worth more than any of them.
Next up: the table of all option strategies, or the strategy finder.
Sources
This material is general information about option strategies, written for a general audience. It is not investment advice, not a recommendation, and not financial analysis. Options can lose their entire value, and uncovered positions can lose more than the amount committed. Anything said about tax is general in nature and is no substitute for professional tax advice. Last reviewed: 2026-08-06.