Tougher U.S. financial regulation is needed to avoid the rise of excessive risk-taking and asset bubbles in the markets at a time when the Federal Reserve is keeping interest rates low, two senior Fed officials told the Financial Times in an article published on Saturday on.ft.com. Boston Fed President Eric Rosengren told the newspaper that the Fed lacked sufficient tools to prevent companies and households from taking on “excessive leverage” and called for a rethink on issues related to U.S. financial stability. “If you want to follow a monetary policy ... that applies low interest rates for a long time, you want ... (full story)