FINRA proposed the implementation of "an anonymous, grouped masking methodology" in order to address confidentiality concerns regarding the publication of over-the-counter ("OTC") trading activity as required by the Regulation NMS Plan Tick Size Pilot Program. FINRA explained that the proposed methodology is "intended to mitigate confidentiality concerns previously raised by commenters regarding the publication of data related to OTC activity."

Comments should be submitted within twenty-one days of the proposal's publication in the Federal Register.

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