SIFMA AMG provides comment to multiple agencies to express its concern that the U.S. and Europe may no longer pursue synchronized phase-in of their respective margin requirements for uncleared swaps.S IFMA AMG believes that synchronization of uncleared swap margin implementation has been (and continues to be) key to avoid causing disparate harm to market participants, including mutual funds, pension funds and other financial end-users whose investments are managed by asset managers.