US stocks open slightly lower as IBM weighs; earnings eyed By: CNBC.com News October 20, 2015 at 09:30 AM EDT U.S. stocks opened slightly lower Tuesday as Wall Street digested a slew of corporate earnings reports and U.S. housing starts data. Read More >> Related Stocks: Aetna Amazon.com Humana International Business Machines TravelersCompanies United Technologies Verizon Communications Yum Brands