Stocks to watch Monday: Cephalon, AT&T By: MarketWatch October 10, 2011 at 06:36 AM EDT M&A developments in the energy and drug sectors are to be found among the early corporate headlines to begin the U.S. trading week. Read More >> Related Stocks: AT&T Inc Apple Macy's Mistras Group Inc Oppenheimer Holdings Oshkosh Truck Corp Superior Energy Services Verizon Communications West Pharmaceutical Services