Wall Street opens lower after three-day rally

Twitter shares jumped 15.7 percent to $21.55 after CNBC reported the microblogger is moving closer to a sale and that suitors include Alphabet's Google and Salesforce.com . Investors have been in risk-on mode again, encouraged by the Fed's decision to stand pat on rates at a meeting this week. "There is some consolidation after the very active and positive week for stocks based on news flow from the central banks, said David Donabedian, chief investment officer of Atlantic Trust Private Wealth M