On March 4th, the SEC provided notice of BOX Options Exchange's filing of a proposed rule change that would amend the rules related to trading Complex Orders on BOX Market, the options trading facility of the Exchange. In particular, the Exchange proposes rules to facilitate interaction on a continuous and real-time basis among orders on BOX, consisting of Complex Orders on the Complex Order Book and interest on the BOX Book. The proposed rule change generally sets forth rules to facilitate and permit (i) Complex Orders to trade with interest on the BOX Book and (ii) the combination of a Complex Order and an order on one of its component single option series trading on the BOX Book (each a "Leg") to trade with orders on the other component Leg on the BOX Book. Comments should be submitted within 21 days after publication in the Federal Register, which is expected during the week of March 11. SEC Release No. 34-69027.