The Commodity Futures Trading Commission’s Market Participants Division issued an interpretation clarifying what assets qualify as eligible margin collateral for certain uncleared swap transactions under CFTC Regulation 23.156. Under the interpretation, shares of certain U.S. Treasury exchange-traded funds (UST ETFs) may be treated as “redeemable securities in a pooled investment fund” and therefore qualify as eligible initial margin (IM) and variation margin (VM) collateral, subject to the conditions in Regulation 23.156. The division’s view would permit swap dealers to post and collect such UST ETF shares as IM for uncleared swap transactions with any covered counterparty, and as VM for uncleared swap transactions with financial end users. The interpretation follows a recommendation from the CFTC’s Global Markets Advisory Committee and was prepared by its Global Market Structure Subcommittee.