These are the worst S&P 500 stocks of 2016 By: MarketWatch January 15, 2016 at 17:25 PM EST Seven large-cap stocks have tumbled at least 30%, writes Phil van Doorn. Read More >> Related Stocks: Alcoa Anadarko Petroleum Borg Warner CONSOL Energy ENSCO Plc Freeport-McMoRan Marathon Oil Owens-Illinois Qorvo Inc Standard & Poors 500 Williams Companies