US STOCKS-Futures edge up as investors await earnings onslaught By: Reuters: Company News April 21, 2014 at 07:35 AM EDT * S&P 500 coming off biggest weekly percentage gain since July Read More >> Related Stocks: AT&T Inc Apple Biogen Idec Caterpillar Facebook General Electric Google, Inc. Hasbro International Business Machines McDonald's Corp Morgan Stanley Netflix SunTrust Banks