US stocks soared Wednesday to all-time highs after the Federal Reserve left its huge monetary stimulus in place. Shortly after the Fed announcement, the Dow Jones Industrial Average surged to a 15,709.58 and the S&P 500-stock index hit 1,729.44. Their record closes were on August 2, at 15,658.36 for the Dow and 1,709.62 for the S&P.