Federal Reserve Chairman Ben Bernanke on Wednesday offered a tempered view of the U.S. economy, pouring cold water on the notion that recent upbeat signs herald a stronger recovery. Bernanke told Congress that unless growth accelerated, the unacceptably high U.S. unemployment rate would not keep dropping. But he stopped short of signaling further Fed bond purchases, dashing the hopes of some traders in financial markets who were betting on more monetary stimulus. "The job market is far from normal," Bernanke said. "Continued improvement ... is likely to require stronger growth in final demand and production." The swift decline in the...