US stocks start lower; cautious stance ahead of earnings By: CNBC.com News January 13, 2014 at 09:30 AM EST U.S. stocks opened lower on Monday, with investors taking a cautious stance ahead of quarterly earnings that begin in earnest this week. Read More >> Related Stocks: Charles Schwab Comerica Fastenal Co General Electric Intel Corp JPMorgan Chase & Co Lululemon Athletica Sentinelone Inc Cl A Symantec Corp Wells Fargo