5739. Short iron butterfly spread

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    1. Where a Dealer Member inventory or client account contains a short iron butterfly spread combination on the same underlying interest with all exchange-traded options expiring at the same time, such that four separate options series are held wherein the exercise prices of the options are in ascending order, and the interval between the exercise prices is equal, comprising short positions in a call option and a put option with the same exercise price and the short options are flanked on either side by a long put option and a long call option having a lower and higher exercise price respectively, the minimum margin required shall equal the exercise price interval multiplied by the unit of trading.

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    There is no history log for this rule.