Learn how moving both short strikes to one center strike changes the credit, range, Greeks and reversal risk.
How the structures differ
An iron condor uses different short put and short call strikes, creating a flat maximum-profit range between them. An iron butterfly uses the same center strike for both short options, creating maximum profit at one expiration price.
The long wings define risk, but their distances may be equal or broken-wing. Conversion changes the payoff rather than merely repairing the old trade.
Why consider conversion
Moving the untested short option toward the tested short strike can add credit and create a shared body. The added credit may improve one breakeven and reduce maximum loss measured from total collected premium.
In exchange, the profitable region narrows and reversal risk grows. The center strike becomes the key target.
Choose the center and wings
Base the center on the updated price forecast, not automatically on the tested strike. Review whether existing wings still create acceptable widths. Unequal wings can produce asymmetric loss and may require different buying power.
Map expiration P&L at both wings, the center and several prices around each breakeven.
Execution and assignment
Closing one short option and opening another at the center can temporarily distort the position. Use a spread order when possible and verify quantities after the fill.
Near expiration, two short options at the same strike can create complex assignment outcomes. Close early when the resulting share exposure is unacceptable.
Condor-to-butterfly example
A 90/95/105/110 condor is adjusted after the stock rises toward 105. Moving the short 95 put to 105 converts the body to the 105 strike and adds credit. The new iron butterfly benefits most near 105 at expiration but loses its original 95-to-105 flat profit range.
Practical checklist
- Draw the payoff before and after conversion.
- Calculate total cumulative credit without hiding realized P&L.
- Stress a reversal away from the center.
- Check whether wing widths are symmetric.
- Plan exit before center-strike assignment uncertainty.
Frequently asked questions
Does an iron butterfly have a wider profit range?
Usually no. It concentrates maximum profit at the shared short strike, although credit creates two breakevens.
Can the conversion reduce maximum loss?
Added credit can reduce measured maximum loss, but the range and directional risks also change.
Is an iron butterfly just an iron condor with closer strikes?
They use similar four-leg components, but the shared short strike creates a materially different payoff shape.
- Complete iron condor adjustment guide
- Manage a tested side
- Roll the untested side
- Roll to the next expiration
- Close instead of adjust
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Options involve risk and are not suitable for every investor. This material is educational and is not investment, tax or legal advice. Contract terms, settlement and broker requirements can vary.