Biggest Pre-Market Winners and Losers

Winners: Novozymes A/S NVZMF is up over 6%. Apollo Group APOL is up over 5%. Marathon Oil MRO is up over 4% after completing spinoff of oil refiner. Dendreon DNDN is up over 3.50%. Cablevision Systems CVC is up nearly 3.50%. Losers: Discover Financial DFS is down nearly 2.50%. Silver Wheaton SLW is down over 2.25% despite a pre-market rally in silver prices. Eldorado Gold EGO is down over 1.50% despite a pre-market rally in gold prices. Riverbed Tech RVBD is down over 1.60% after Oppenheimer cut its rating on the company. CSL CMXHF is down over 1.40%.