The SEC will hold an Open Meeting on January 13th at which the Commissioners are expected to consider the publication of a concept release on equity market structure. The concept release is expected to address a wide range of issues, including the performance of equity market structure in recent years, high frequency trading, and undisplayed, or "dark," liquidity associated with alternative trading systems. The Commission is also expected to consider the proposal of a new rule regarding risk management controls and supervisory procedures to manage financial, regulatory and other risks for brokers or dealers that provide market access. Open Meeting Notice.