On a good day, 27-year-old Bobby Timberlake at CME Group Inc. (CME) in Chicago rounds up $2.5 billion from the world’s biggest traders and banks such as JPMorgan Chase & Co. (JPM) to cover their losses in the $639 trillion derivatives markets. What happens on a bad day will test new rules in the …

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Swaps ‘Armageddon’ Lingers as New Rules Concentrate Risk
