ABU DHABI, United Arab Emirates (AP) — Former Federal Reserve Chairman Paul Volcker on Wednesday urged critics of a proposed U.S. rule limiting speculative trading by banks to get behind the measure, saying that opposition to it is not in their interest.

His defense of the so-called Volcker Rule at a financial conference in the Emirati capital Abu Dhabi was the latest in an ongoing fight between Wall Street and Washington over tighter restrictions for banks operating in the United States.