Iron Butterfly
Maximize premium collection with the iron butterfly strategy for pinning stocks
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Iron Butterfly
The iron butterfly is the iron condor's aggressive cousin. Instead of selling options far away from the current price, you sell both the call and the put at the same strike — right at the money. The result is a much larger credit but a much narrower profit zone.
The Structure
- Sell an at-the-money call
- Sell an at-the-money put (same strike as the call)
- Buy an out-of-the-money call (protection above)
- Buy an out-of-the-money put (protection below)
The short call and short put share the same strike price. This is the key difference from an iron condor, where the short strikes are at different levels.
Real Example
QQQ is at $380. You think it is going to stay right around this level for the next 30 days.
- Sell the $380 put for $7.00
- Sell the $380 call for $7.50
- Buy the $370 put for $3.00
- Buy the $390 call for $3.50
Total credit: ($7.00 - $3.00) + ($7.50 - $3.50) = $4.00 + $4.00 = $8.00 ($800 per iron butterfly)
Max profit: $800 — if QQQ closes exactly at $380 at expiration Max loss: $200 — width of one side ($10) minus credit ($8) Breakeven (lower): $372 — center strike minus credit Breakeven (upper): $388 — center strike plus credit
Compare this to a typical iron condor on QQQ that might collect $1.50 to $2.00. The iron butterfly collects $8.00. Massive difference. But there is a catch.
The Catch
With an iron condor, max profit happens anywhere between your short strikes — a wide range. With an iron butterfly, max profit only happens at one exact price: the center strike. The further QQQ moves from $380, the less you make.
That said, you still profit anywhere between $372 and $388. That is a $16 range. You just do not make the full $800 unless QQQ pins at $380.
In practice, traders almost never hold to expiration chasing the exact pin. They close at 25% to 50% of max profit, which is still $200 to $400 — a solid return on $200 max risk.
Iron Butterfly vs. Iron Condor
| Feature | Iron Condor | Iron Butterfly |
|---|---|---|
| Short strikes | Different (OTM) | Same (ATM) |
| Credit collected | Smaller | Much larger |
| Max profit zone | Wide range | Single price point |
| Breakeven range | Wider | Narrower |
| Typical management | Close at 50% max | Close at 25-50% max |
| Best for | Broad range expectation | Tight range / pinning |
When to Use an Iron Butterfly
Pinning action expected. Stocks sometimes pin near large open interest strikes at expiration. If QQQ has massive open interest at $380 and expiration is approaching, an iron butterfly centered at $380 capitalizes on that magnet effect.
High IV, you want maximum premium. If VIX is at 30 and you want to sell as much premium as possible with defined risk, the iron butterfly is the most premium-rich defined-risk structure available.
You plan to close early. If your standard approach is to close at 25% of max profit, the iron butterfly gives you more dollars per trade for the same capital at risk. A $200 gain (25% of $800) on $200 risk is a 100% return on risk.
Managing the Trade
Close at 25% of max profit. This is the standard for iron butterflies. You collected $8.00 — close when the spread is worth $6.00. You profit $2.00 ($200) on $200 max risk. That is a 100% return on risk, and you did it without needing the stock to pin.
Close at 50% if conditions are right. If the stock is sitting right at your center strike with 15 days left, let it ride a bit longer. The closer you get to max profit, the more gamma risk you carry, so manage accordingly.
Adjust one side. If QQQ moves to $386, the call side is getting tested. You can close just the call spread (taking a loss on that side) and let the put spread decay. Or roll the whole position to re-center it at $385.
Time-based exit. Close with at least 7 days remaining regardless of profit. Gamma becomes extreme near expiration when both short options are at-the-money.
A Practical Iron Butterfly Setup
- Find a stock or ETF trading at a round number with high open interest at that strike
- Sell the ATM call and ATM put at that strike
- Buy protection $10 away on each side
- Target 30 to 45 days to expiration
- Close at 25% of max credit or with 7 days left, whichever comes first
Watch Out For
The stock trends away. If QQQ drops to $370, your iron butterfly is at max loss on the put side. The put spread is fully in-the-money. Close and move on.
Wide bid-ask spreads. Four legs means four bid-ask spreads eating into your profit. Only trade iron butterflies on liquid underlyings.
Overconfidence from the big credit. An $800 credit feels great until you lose $200 three times in a row. Respect the strategy, manage early, and do not oversize.
The iron butterfly is a powerful tool when you expect a stock to stay put. Up next: calendar spreads, where we explore time as a dimension of trading.