Implied Volatility Increase

Long Iron Butterfly

This strategy profits if the underlying stock is outside the wings of the iron butterfly at expiration.


This strategy combines a short call at an upper strike, a long call and long put at a middle strike, and short a put at lower strike. The upper and lower strikes (wings) must both be equidistant from the middle strike (body), and all the options must be the same expiration.

An alternative way to think about this strategy is a long straddle with a short strangle. It could also be considered as a bull call spread and a bear put spread.


The investor is looking for a sharp move either up or down in the underlying stock during the life of the options.


This strategy profits if the underlying stock is outside the wings of the iron butterfly at expiration.


Profit from a move in the underlying stock in either direction.

Long Iron Butterfly
Net Position (at expiration)


  • Short 1 XYZ 65 call
  • Long 1 XYZ 60 call
  • Long 1 XYZ 60 put


  • High strike - middle strike - net premium paid


  • Net premium paid


While this strategy has a similar risk/reward profile to the short call butterfly and short put butterfly, the long iron butterfly differs in that a negative cash flow occurs up front, and any positive cash flow is uncertain and would occur somewhere in the future.

Max Loss

The maximum loss would occur should the underlying stock be at the body of the butterfly at expiration. In that case all the options would expire worthless, and the premium paid to initiate the position would have been lost.

Max Gain

The maximum gain would occur should the underlying stock be outside the wings at expiration. In that case, either both calls or both puts would be in-the-money. The profit would be the difference between the body and either wing, less the premium paid to initiate the position.


The potential profit and loss are both very limited. In essence, an iron butterfly at expiration has a minimum value of zero and a maximum value equal to the distance between either wing and the body. An investor who buys an iron butterfly pays a premium somewhere between the minimum and maximum value, and profits if the butterfly's value moves toward the maximum as expiration approaches.


The strategy breaks even if at expiration the underlying stock is either above or below the body of the butterfly by the amount of premium paid to initiate the position.


An increase in implied volatility, all other things equal, would have a positive impact on this strategy.

Time Decay

As with most strategies where the investor is a net buyer of option premium, passage of time, all other things equal, will have a negative effect on this strategy.

Assignment Risk

Yes. The short options that form the wings of the butterfly are subject to exercise at any time, while the investor decides if and when to exercise the body. If an early exercise occurs at the wing, the investor can exercise an option at the body (put or call, whichever is appropriate) to lock in the maximum gain and continue to hold the other half of the position, which might still have value.  So early exercise might be a good thing, although it may require borrowing stock or financing stock for one business day.

And be aware, a situation where a stock is involved in a restructuring or capitalization event, such as a merger, takeover, spin-off or special dividend, could completely upset typical expectations regarding early exercise of options on the stock.

Expiration Risk

Yes. This strategy has expiration risk. If at expiration the stock is trading right at either wing the investor faces uncertainty as to whether or not they will be assigned on that wing. Should the investor not be assigned on the wing, they could be unexpectedly long or short the stock on the Monday following expiration and hence subject to an adverse move over the weekend.



Related Position

Comparable Position: Short Call Butterfly

Opposite Position: Short Iron Butterfly

A Service Of:

  • OCC

OIC Participant Exchanges:

  • BOX
  • Cboe
  • MIAX
  • Nasdaq
  • NYSE

OCC 125 South Franklin Street, Suite 1200 | Chicago, IL 60606

This web site discusses exchange-traded options issued by The Options Clearing Corporation. No statement in this web site is to be construed as a recommendation to purchase or sell a security, or to provide investment advice. Options involve risk and are not suitable for all investors. Prior to buying or selling an option, a person must receive a copy of Characteristics and Risks of Standardized Options. Copies of this document may be obtained from your broker, from any exchange on which options are traded or by contacting The Options Clearing Corporation, 125 S. Franklin Street, Suite 1200, Chicago, IL 60606.

©1998-2020 The Options Clearing Corporation - All rights reserved.

User acknowledges review of the User Agreement and Privacy Policy governing this site. Continued use constitutes acceptance of the terms and conditions stated therein.