Evening Movers: Amgen Slumps, Weight Watchers Jumps, Las Vegas Sands Slips

With companies like Under Armour ( UAA ), MGM Resorts International ( MGM ), and United Parcel Service ( UPS ) reporting tomorrow, we thought we'd get a jump start on the stocks moving after today's close: Amgen ( AMGN ) has tumbled 3.6% to $158.65 after...