15 large-cap stocks are already down at least 10% in 2016 By: MarketWatch January 07, 2016 at 09:43 AM EST The weakest S&P 500 stocks so far in 2016 are spread among five sectors, writes Phil van Doorn. Read More >> Related Stocks: Alcoa Apache Corp AutoNation CF Industries Holdings CarMax Chipotle Mexican Grill Diamond Offshore Drilling ENSCO Plc Fossil Group Marathon Oil Murphy Oil Qorvo Inc Skyworks Solutions Tenet Healthcare Williams Companies