Stocks fall as IBM; Dow down 100-plus pts By: CNBC.com News October 20, 2014 at 09:30 AM EDT U.S. stocks opened lower on Monday, extending the S&P 500's longest weekly loss streak since 2011, after IBM cut its earnings forecast. Read More >> Related Stocks: Abbott Laboratories Alaska Air Group Altera Corp Apple Boeing Co Bristol-Myers Squibb Caterpillar Celgene Corp Cheesecake Fact Colgate-Palmolive Comcast Corp Delphi Automotive Plc Dow Chemical Dr. Pepper Snapple Group Dunkin' Brands Group EMC Corp Eli Lilly General Electric General Motors Genl Dynamics Gsk Plc ADR Halliburton Co Harley-Davidson Illinois Tool Works Imax Corp International Business Machines Intuitive Surgical Jetblue Airways Corp Juniper Networks Kimberly-Clark Lockheed Martin Microsoft Morgan Stanley Norfolk Southern Northern Trust Occidental Petroleum Omnicom Group Procter & Gamble Raytheon Co Ryder System Sentinelone Inc Cl A Southwestern Energy Under Armour Union Pacific Varian Medical Systems Verizon Communications Vmware Inc W.R. Grace & Company Xerox Corp Yelp Inc