Janet Yellen spooked the bond market on Friday with a speech in which she talked about letting the economy run hotter even if it meant the Fed's inflation target could be exceeded. The Federal Reserve may need to run a "high-pressure economy" to reverse damage from the 2008-2009 GFC that depressed output, pushed workers out of the workforce, and risks becoming a permanent drag on America's growth potential, according to Federal Reserve Chair Janet Yellen. Though not addressing interest rates or immediate policy concerns directly, Ms Yellen laid out the deepening concern at the Fed that US economic potential is slipping and aggressive steps may be needed to rebuild it.