By Pete Schroeder WASHINGTON (Reuters) – Wall Street reversed course and turned negative on Thursday and bond yields surged as Federal Reserve Chairman Jerome Powell suggested the U.S. central bank would move aggressively to curb inflation. Powell said that a half-point interest rate increase will be “on the table” when the Fed meets in May, adding it would be appropriate to “be moving a little more quickly.” U.S. stocks opened strong, buoyed by corporate earnings and strong jobless data, but began to retreat ahead of Powell’s afternoon remarks as investor concerns about central banks’ inflati…