As you were previously notified in CME Group Special Executive Report, S-6184, dated Tuesday, April 3, 2012, CME is changing its methodology for calculation of the performance bond requirements for Cleared Over-the-Counter ("OTC") Foreign Exchange ("FX") Spot, Forward and Swap Transactions from Standard Portfolio Analysis ("SPAN®") to Historical Value at Risk ("HVaR"). CME is clarifying the implementation schedule as follows:
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