Proposed Rule Change Relating to the Implementation Date of Market Participant Identifier Requirements for Alternative Trading Systems

Financial Industry Regulatory Authority, Inc. ("FINRA") is filing with the Securities and Exchange Commission ("SEC" or "Commission") a proposed rule change to postpone until February 2, 2015, the implementation date of the requirement that alternative trading systems ("ATSs") use unique market participant identifiers ("MPIDs") when reporting order and trade information to FINRA.