The Commodity Futures Trading Commission headquarters in Washington.Photographer: Tierney L. Cross/BloombergThe Commodity Futures Trading Commission has taken a step that could make it easier for some overseas crypto exchanges to legally offer derivatives to American traders, a move that could reopen a path back into the US for firms like Binance Holdings Ltd.The agency issued an advisory clarifying how foreign platforms can register as so-called foreign boards of trade, provided they are fully ...