A strategy combining a bull spread on put options and a bear spread on call options on the same underlying with the same maturity at three different exercise prices. A long iron butterfly refers to the purchase of a put option with a lower exercise price and of a call option with a higher exercise price, and to the simultaneous sale of another put option and another call option at the same middle exercise price. A short iron butterfly (or reverse iron butterfly) refers to the sale of a put option with a lower exercise price and a call option with a higher exercise price, and to the simultaneous purchase of another put option and another call option at the same middle exercise price.