US stocks open slightly higher amid M&A and earnings By: CNBC.com News April 22, 2014 at 09:30 AM EDT U.S. stocks opened little changed to slightly higher on Tuesday as investors considered earnings from companies including McDonald's. Read More >> Related Stocks: 3M Co AK Steel Holding Corp Allegheny Technologies Altria Group Amazon.com American Electric Power Amgen Amtd Idea Group Biogen Idec Boeing Co Broadcom Corp C.R. Bard Cabot Oil & Gas Caterpillar Celgene Corp Colgate-Palmolive D.R.Horton Dana Inc Delphi Automotive Plc Dow Chemical Dr. Pepper Snapple Group Dunkin' Brands Group EMC Corp Eli Lilly Entergy Corp Ericsson ADR F5 Networks Facebook General Motors Gilead Sciences Harley-Davidson Illinois Tool Works Ingersoll-Rand Plc Intuitive Surgical Johnson Controls Juniper Networks LPL Financial Holdings Inc Lockheed Martin McDonald's Corp Microsoft Netflix Noble Energy Norfolk Southern Northrop Grumman Novartis Ag Novartis Ag ADR Nucor Corp Occidental Petroleum Omnicom Group Owens Corning Inc Procter & Gamble PulteGroup Qualcomm, Inc. Quest Diagnostics Raytheon Co Sentinelone Inc Cl A Simon Property Group Stanley Black & Decker Starbucks Corp T.Rowe Price Group Texas Instruments Under Armour United Technologies VF Corp Valeant Pharmaceuticals International, Inc. Verizon Communications W.R. Grace & Company Weyerhaeuser Co Xerox Corp Xilinx Yum Brands Zynga Inc Cl A