On August 4th, the Commission provided notice of the Chicago Stock Exchange's (the "Exchange") proposal to permit exchange-registered Institutional Broker ("Institutional Broker") firms to establish and operate separate, non-Institutional Broker units within the firms. The Exchange proposes to add information barrier requirements for Institutional Brokers that wish to operate a separate unit within the larger firm to conduct business other than as an Institutional Broker. Comments should be submitted on or before August 31, 2011. SEC Release No. 34-65035.