On October 11th, the SEC provided notice of the FINRA's filing of a proposal that would adopt FINRA Rule 4552 to require each alternative trading system ("ATS") to report to FINRA weekly volume information and number of trades regarding securities transactions within the ATS and amend FINRA Rules 6160, 6170, 6480, and 6720 to require each ATS to acquire and use a single, unique market participant identifier when reporting information to FINRA. Comments should be submitted within 21 days after publication in the Federal Register, which is expected during the week of October 21. SEC Release No. 34-70676.