U.S. stocks moved back into the red Wednesday after the Federal Reserve left interest rates unchanged and said "economic growth slowed" since its last meeting in December. "Inflation is expected to remain low in the near term," the Fed said in new, more cautious language, that suggests the central bank won't be quick to raise interest rates again. "Lower oil prices and weak global economic growth would make the Fed more cautious about its tightening policy. The second interest rate increase in March has become unlikely," said Jia Liu, research fellow at the American Institute for Economic Research in emailed...