[U.S. SEC to Host Roundtable on Prohibition of Trade-Through Rules on September 18] Foresight News reports that the U.S. SEC will host a roundtable on the prohibition of trade-through rules on September 18 at its headquarters in Washington. SEC Commissioners Caroline Crenshaw, Hester Peirce, and Director of the Division of Trading and Markets Jamie Selway will deliver opening remarks, while SEC Chairman Paul S. Atkins will give a speech. The meeting will feature three panel discussions focusing on market participants' experiences over the past 20 years, the role of the trade-through prohibition in the current market structure, and potential future development paths.