Iron Condor: Payoff, Breakevens, and Hidden Risks

For educational purposes only; not investment advice.

Direct answer

A short iron condor combines an out-of-the-money put credit spread and call credit spread with the same expiry. It usually receives a net credit and has bounded expiration loss on both sides. Maximum profit occurs when the underlying expires between the two short strikes; loss begins beyond the breakevens and reaches its maximum beyond a long wing. The strategy expresses a range and often short-volatility view, but it is not a low-risk income product. Large moves, rising implied volatility, Gamma, four-leg execution, and assignment can produce losses before expiration.

Four-leg structure and formulas

With strikes K_1<K_2<K_3<K_4, buy the K_1 put, sell the K_2 put, sell the K_3 call, and buy the K_4 call. If net credit is c per share, maximum profit is c×multiplier. Downside maximum loss is (K_2-K_1-c)×multiplier; upside maximum loss is (K_4-K_3-c)×multiplier. Breakevens are K_2-c and K_3+c.

When wing widths differ, the two maximum losses differ and position sizing must use the worse side. The expiration profit plateau lies between short strikes, not between breakevens. Before expiration, the position’s mark depends on spot, implied volatility and skew, time, rates, dividends, and each leg’s Bid/Ask.

The 90/95/105/110 example

With the underlying at $100, use one expiry: buy $90 put, sell $95 put, sell $105 call, and buy $110 call. If the four-leg order collects $1.50 and multiplier is 100:

Maximum profit: $1.50×100=$150 if expiration is between $95 and $105.
Maximum loss: ($5-$1.50)×100=$350 below $90 or above $110.
Breakevens: $95-$1.50=$93.50 and $105+$1.50=$106.50.

At $92 expiration, the put spread is worth $3 and P&L before costs is ($1.50-$3)×100=-$150. At $108, the call spread is also worth $3 and the same loss results. At $100, all four options expire worthless and the full credit remains, subject to fees.

Pre-trade checklist and risks

Enter all four legs as one defined package where possible; legging can create temporary naked or directional exposure.
Verify expiry, quantities, multipliers, exercise style, settlement, and ascending strikes before submitting.
Use executable package Bid/Ask, not the sum of ideal midpoints; four spreads and fees can materially reduce expectancy.
Calculate each wing separately and size the trade from maximum loss, not credit received or broker buying-power relief.
Distinguish expiration payoff from current P&L. A still-in-range position can lose when IV rises or expiry remains distant.
Stress gaps through a wing, volatility/skew shifts, widening spreads, and inability to close all legs together.
Near expiration, Gamma rises and a small move can rapidly change Delta and spread value.
American-style short legs may be assigned early, especially around ex-dividend dates or when extrinsic value is minimal.
Near a short strike, pin and after-hours movement can leave unexpected stock after exercise and assignment processing.
Define profit target, loss limit, adjustment permission, and time exit before entry; compare any adjustment with simply reducing or closing.

Common misconceptions

“Any finish inside the breakevens earns maximum profit.” Maximum profit requires expiration between the short strikes.
“Defined risk means low risk.” Maximum loss can be multiple times the credit and can arrive quickly.
“High probability of profit means positive expected value.” Probability omits payoff size, costs, and estimation error.
“Theta guarantees income while price stays in range.” IV and directional movement can outweigh time decay.
“Long wings eliminate assignment risk.” They cap expiration payoff but do not prevent early or mismatched processing.
“More distant strikes are automatically safer.” Credit, width, volatility, liquidity, and gap risk jointly matter.
“An iron condor is just two independent spreads.” Portfolio margin, fills, Greeks, and management interact across all legs.