Stocks slipped Thursday as big bank earnings kicked off with disappointing results and traders assessed the possibility of even tighter U.S. monetary policy from the Fed.  The Dow fell 142.62 points. The S&amp;P 500 dropped 0.3%. The Nasdaq was up 0.03%.  https://t.co/wbVtJ9pfbV  https://t.co/NlDBGqMA0u