Tuesday's biggest gaining and declining stocks
July 21, 2009 at 07:49 AM EDT
Stocks expected to move significantly in trading on Tuesday include Boston Scientific, Caterpillar, Coke, Lexmark, Comerica, Continental Air, DuPont, Elan, Intel, Legg Mason, Magna International, Merck, Schering-Plough, TI and UnitedHealth.