Wall Street's worst month in three years ends on a sour note

Wall Street ended lower on Monday and wrapped up its worst month since 2012 after comments from a senior Federal Reserve official heightened fears among investors of a potential U.S. interest hike in September. Fed Vice Chairman Stanley Fischer on Saturday said U.S. inflation would likely rebound as pressure from the dollar fades, allowing the Fed to raise interest rates gradually. Many analysts took Fischer's comments as a sign the Fed would raise rates in September, instead of December.