• On April 11th, the SEC provided notice of the Chicago Board Options Exchange's filing of a proposed amendment to its rules related to complex orders to provide additional liquidity for complex orders resting on the complex order book ("COB"). The Exchange proposes to adopt a new order type called "leg orders." Under Rule 6.53C, complex orders are eligible to trade with other complex orders or by "legging" with the individual orders and quotes resting in the CBOE electronic book (the "EBook") for the individual component legs, provided the complex order can be executed in full (or in a permissible ratio) by the orders and quotes in the EBook in those individual component legs. Leg orders are designed to increase the opportunities for complex orders resting in the COB to leg into the market and execute. Comments should be submitted on or before May 8, 2013. SEC Release No. 34-69364.