Iron Condors Explained: Four Legs, Two Breakevens, and the Real Risk-Reward

An iron condor is a four-option position that combines a bull put spread below the stock price with a bear call spread above it, all with the same expiry. You collect a net premium up front and keep all of it if the stock finishes between the two short strikes; if it moves far enough in either direction, you lose a fixed, larger amount.

In short: an iron condor = sell an out-of-the-money put + buy a further out-of-the-money put + sell an out-of-the-money call + buy a further out-of-the-money call. The maximum gain is the net credit. The maximum loss is the width of one spread minus the credit, times 100. There are two breakevens: the short put strike minus the credit, and the short call strike plus the credit. It is a short-volatility position with defined risk: it profits from time passing and the stock staying put, and it is hurt by large moves and rising implied volatility.

How the position is built

An iron condor is two vertical spreads placed side by side:

Leg	Action	Role
Lower put	Buy	Caps the loss on the downside
Higher put	Sell	Collects premium; loses if the stock falls below it
Lower call	Sell	Collects premium; loses if the stock rises above it
Higher call	Buy	Caps the loss on the upside

The two inner (short) strikes define the profit zone. The two outer (long) strikes define the “wings” that limit the loss. All four options share the same expiry. Usually both spreads have the same width, so the maximum loss is the same on either side.

The stock can only finish beyond one of the two short strikes at expiry, not both, which is why most brokers count the maximum loss of only one side as the collateral requirement.

A worked example

Hypothetical Maple Widgets Inc. trades at $50. With 45 days to expiry, using illustrative prices:

Leg	Strike	Price
Buy put	$40	$0.25 paid
Sell put	$45	$1.00 received
Sell call	$55	$1.15 received
Buy call	$60	$0.40 paid

Net credit: $1.00 + $1.15 minus $0.25 minus $0.40 = $1.50, or $150.
Width of each spread: $5.
Maximum gain: $150, anywhere from $45 to $55 at expiry.
Maximum loss: ($5 minus $1.50) x 100 = $350, at $40 or below, or $60 or above.
Breakevens: $45 minus $1.50 = $43.50 and $55 + $1.50 = $56.50.

Payoff at expiry

Price at expiry	Put spread	Call spread	Total, including $150 credit
$35	minus $500	$0	minus $350
$40	minus $500	$0	minus $350
$43.50	minus $150	$0	$0 (breakeven)
$45	$0	$0	+$150
$50	$0	$0	+$150
$55	$0	$0	+$150
$56.50	$0	minus $150	$0 (breakeven)
$60	$0	minus $500	minus $350
$65	$0	minus $500	minus $350

(The spread columns show what each spread costs to settle at expiry, before the credit.) The profit zone is a $10 band, from $45 to $55, with a sloping region on each side where losses build up to the $350 cap.

Max gain, max loss, and breakevens

Maximum gain: net credit. Here, $150.
Maximum loss: (spread width minus net credit) x 100. Here, $350.
Lower breakeven: short put strike minus net credit. Here, $43.50.
Upper breakeven: short call strike plus net credit. Here, $56.50.

Reading the risk-reward honestly

Risking $350 to make $150 looks unattractive in isolation, and a wide profit zone looks attractive. Both impressions leave something out. The option prices already reflect the market’s estimate of how likely the stock is to finish in each region. A condor with a wider profit zone collects less credit; a narrower one collects more. Changing the strikes moves you along that trade-off; it does not create an edge by itself. Over many trades, one or two maximum losses can erase several maximum gains: here, each $350 loss wipes out more than two full $150 wins.

Iron condor vs short strangle: what the wings cost

Remove the two long options and an iron condor becomes a short strangle: sell the $45 put and the $55 call, and nothing else. Using the same prices, that collects $2.15 ($215) instead of $1.50. The $65 difference is what the wings cost, and what they buy is a cap on the loss.

Price at expiry	Short strangle (45/55)	Iron condor (40/45/55/60)	Wider condor (35/45/55/65)
$35	minus $785	minus $350	minus $805
$45 to $55	+$215	+$150	+$195
$65	minus $785	minus $350	minus $805
$75	minus $1,785	minus $350	minus $805

The wider condor assumes illustrative prices of $0.05 for the $35 put and $0.15 for the $65 call, for a net credit of $1.95: maximum loss ($10 minus $1.95) x 100 = $805, breakevens $43.05 and $56.95. Moving the wings further out collects more and risks more, approaching the strangle’s open-ended loss. Narrower wings collect less and cap the loss sooner. The choice of width is a choice of how much tail risk to keep, not a way to improve the odds.

How time decay and volatility affect it

An iron condor is net short options, so its sensitivities are those of a seller.

Time decay helps when the stock is inside the short strikes. Using a simple pricing model at 40% implied volatility, the four-leg condor above would cost about $1.46 to buy back with 45 days left and the stock at $50. With 20 days left and the stock still at $50, it would cost about $0.62: a paper gain of $88 on the original $150 credit. Most of the remaining value would disappear only in the final weeks, which is when the position is also most sensitive to moves (see gamma explained).

Time decay can hurt when the stock is outside them. If the stock rises to $56 with 10 days left, the same model puts the condor’s buy-back cost at about $1.75, more than the $1.50 collected. As expiry approaches with the stock beyond a short strike, the position moves toward its maximum loss.

Rising implied volatility hurts. If implied volatility jumped from 40% to 60% with the stock unchanged at $50 and 45 days left, the model’s buy-back cost would rise to about $2.37: a paper loss of $87 even though the stock didn’t move. Falling implied volatility helps. The Greeks behind these effects are summarised in option Greeks explained.

Assignment and early exercise

US equity options are American-style, so either short leg can be assigned before expiry:

The short call is at risk of early assignment when it is in the money just before an ex-dividend date and its remaining time value is less than the dividend.
The short put is at risk when it is deep in the money with little time value left.

Assignment on one short leg leaves you with a stock position (short shares from the call, long shares from the put) alongside the remaining options. Your long wing still caps the loss at expiry, but you may face margin calls, borrow costs on short shares, or dividend charges in the meantime.

Partial exercise at expiry. If Maple Widgets closes at $57 on expiration day, the short $55 call is in the money and the long $60 call is not. Under the Options Clearing Corporation’s exercise-by-exception procedure (equity options $0.01 or more in the money are exercised unless instructed otherwise), you would likely be assigned on the $55 call and start the next trading day short 100 shares, with no protective option left. A gap up on Monday would be a loss with no cap. Closing the position before expiry avoids this. The mechanics are covered in what happens at expiration.

What can go wrong

A large move in either direction takes the condor to its maximum loss, and it only takes one.
Gaps. Earnings or news can move a stock through both the short and long strikes overnight.
Volatility spikes raise the cost of closing even when the price hasn’t moved much.
Adjusting can add risk. Rolling a tested side further out, or adding contracts to recover a loss, can increase the maximum loss or extend the time at risk.
Four legs, four bid-ask spreads. Entry and exit costs can take a large share of a small credit, especially on less liquid stocks.
Early or partial assignment can leave an unhedged stock position, as in the $57 example.
Holding to the last day. The final days carry the most gamma and the most pin risk. A condor left open into expiry to capture the last few cents of credit is exposed to the largest swings in value for the smallest remaining reward.
Approval and margin. Iron condors usually require a spread-level options approval, and brokers hold the maximum loss as collateral.

The short version

An iron condor sells a put spread and a call spread around the current price. It collects a fixed credit, keeps all of it if the stock stays between the short strikes, and loses a fixed, larger amount if the stock moves beyond either wing. Time decay works for it while the stock is inside the range; big moves, volatility spikes, and expiry-day assignment work against it. The strikes change the trade-off between how often you win and how much you lose, not the underlying arithmetic.