Fed Chairman Ben S. Bernanke

Fed Chairman Ben S. Bernanke

Pete Marovich/Bloomberg

Ben S. Bernanke, chairman of the U.S. Federal Reserve, sent Treasury yields to the highest level in almost two years after outlining a plan June 19 in which the Fed could start curtailing the current pace in $85 billion of bond purchases later this year and end them around mid-2014 if growth is in line with the central bank’s estimates.