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Broken Wing Butterfly Calculator

By Dennis Bosmans · Updated June 2026 · 2 min read · Risk disclaimer

A broken wing butterfly is a butterfly with one wing moved further out. Shifting the wing cheapens the trade — often to a net credit — which removes the loss on that side, at the cost of a larger loss on the other.

Open the Broken Wing Butterfly calculator →

Key characteristics

When to use a broken wing butterfly

Use it when you expect the stock to drift toward a target but want a cheaper, lower-risk version of a butterfly — ideally one that costs nothing or pays a small credit to put on.

It is popular as a directional-neutral income trade because the credit version cannot lose on one side, so a wrong-way move in that direction is harmless.

How the payoff works

Like a standard butterfly, profit peaks if the stock pins the body strike at expiration. By skipping the far wing, you reduce the cost (or collect a credit), which flattens the payoff to zero on that side.

The trade-off: the near side now has a wider gap, so the maximum loss there is larger than a symmetric butterfly would have.

Worked example. Stock at $100. Buy the $99 call, sell two $102 calls, and buy the $107 call (instead of $105 for a symmetric fly). The skipped wing makes it cheaper — possibly a small credit — so a drop below $99 loses nothing. Max profit is around $102; the risk lives between $102 and $107.

Calculate it live

Use the free OptionProfit Broken Wing Butterfly calculator to load a live option chain, build the trade, and instantly see the payoff chart, breakevens, probability of profit, Greeks and a Monte Carlo simulation of outcomes.

Key takeaways

Frequently asked questions

Why open a broken wing butterfly for a credit?

A credit means you cannot lose on the skipped-wing side — a wrong-way move there simply leaves you keeping the credit, which is why traders prefer it over a debit butterfly.

Where is the risk in a broken wing butterfly?

On the side where you did NOT widen the wing. That gap is larger than a symmetric butterfly, so the maximum loss there is bigger.

Is a broken wing butterfly defined risk?

Yes — all four legs are long or short options with capped payoffs, so the maximum loss is known when you open it.

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