2015 year in review: The S&P 500 By: MarketWatch December 28, 2015 at 15:48 PM EST MarketWatch takes a look at the best and worst performers among S&P 500 stocks. Read More >> Related Stocks: AES Corp AGL Resources AT&T Inc Activision Blizzard Alcoa Amazon.com Archer-Daniels-Midland Avery Dennison Corp Boston Scientific CONSOL Energy Cablevision Systems Cameron International CenturyLink Chesapeake Energy Chubb Corp Cigna Corp Cummins Endo Int'l Plc Equifax Equinix Inc Exelon Corp Fossil Group Franklin Resources Freeport-McMoRan Frontier Communications Hormel Foods Kansas City Southern Keurig Green Mountain Kraft Heinz Company Mallinckrodt plc Martin Marietta Materials Masco Corp Michael Kors Holdings Micron Technology NRG Energy NVIDIA Corp Navient Corp Netflix NiSource Northrop Grumman Owens-Illinois Public Storage Regeneron Pharmaceuticals Reynolds American Ryder System Seagate Technology Plc Southwestern Energy TECO Energy Tenaris S.A. ADR Tenet Healthcare Valero Energy VeriSign Verizon Communications Vulcan Materials Western Digital Whole Foods Market Wynn Resorts