On January 14th, the SEC provided notice of the Financial Industry Regulatory Authority's proposed rule change relating to the publication of aggregate daily trading volume data for over-the-counter trades in NMS stocks that are executed within a FINRA member's alternative trading system dark pool and reported to a FINRA Trade Reporting Facility. The proposal would amend FINRA Rule 6160 (Multiple MPIDs for Trade Reporting Facility Participants) to require members that opt to have their trading data published to obtain and use a separate Market Participant Identifier designated exclusively for reporting ATS dark pool transactions; and adopt related Supplementary Material. Comments should be submitted on or before February 12, 2010. SEC Release No. 34-61361.