On September 20th, the SEC provided notice of the New York Stock Exchange's proposal to amend Exchange Rule 1600 (New York Block Exchange) to provide for simultaneous routing, rather than the facility's current sequential routing, of appropriate volume from an NYBX order to attempt to execute simultaneously against all available contra side liquidity within the limit price of the order that is revealed on the initial market evaluation, whether that liquidity (i) is in the NYSE Display Book ("DBK"), displayed and undisplayed, (ii) is in the Facility, (iii) consists of top-of-book contra-side quotations displayed on other automated trading centers that must be routed to in order to avoid potential trade-throughs in compliance with Regulation NMS, or (iv) consists of top-of-book contra-side quotations displayed on other automated trading centers where no potential trade through is involved and Regulation NMS does not require routing. There will no longer be an initial routing of the full amount of the order (less any shares routed to other automated trading centers to comply with Regulation NMS) to the DBK in the hope that there will be some additional volume executed, over and above the displayed and undisplayed contra side liquidity in the DBK, against available contra side interest, if any, in the Capital Commitment Schedule of the Designated Market Maker provided for in NYSE Rule 1000(d)(i). Comments should be submitted on or before October 15th, 2010. SEC Release No. 34-62955.