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Proposed Rule Change to Amend FINRA Rule 4210 (Margin Requirements) to Establish Margin Requirements for the TBA Market

Financial Industry Regulatory Authority, Inc. (“FINRA”) is filing with the Securities and Exchange Commission (“SEC” or “Commission”) a proposed rule change to amend FINRA Rule 4210 (Margin Requirements) to establish margin requirements for (1) To Be Announced (“TBA”) transactions, inclusive of adjustable rate mortgage (“ARM”) transactions, (2) Specified Pool Transactions, and (3) transactions in Collateralized Mortgage Obligations (“CMOs”), issued in conformity with a program of an agency or Government-Sponsored Enterprise (“GSE”), with forward settlement dates, as further defined herein (collectively, “Covered Agency Transactions,” also referred to, for purposes of this filing, as the “TBA market”). The proposed rule change redesignates current paragraph (e)(2)(H) of FINRA Rule 4210 as new paragraph (e)(2)(I), adds new paragraph (e)(2)(H), makes conforming revisions to paragraphs (a)(13)(B)(i), (e)(2)(F), (e)(2)(G), (e)(2)(I), as redesignated by the rule change, and (f)(6), and adds to the rule new Supplementary Materials .02 through .05.