Biggest Winners and Losers as of 10:15AM

Winners: Apollo Group APOL is up over 8% after the company reported positive quarterly results on Thursday. Sina Corp SINA is up almost 4% after the company turned down a $500M investment. Dendreon Corp DNDN is up over 3% after it was revealed on Thursday that the company's prostate drug would be covered by medicare. United Continental UAL is up almost 2.50%. Losers: Most of the biggest losers today have been precious metal companies, as the price of gold and silver has plummeted this morning: Eldorado Gold EGO is down over 3.40%. Silver Wheaton SLW is down over 3.20%. IAMGold IAG is down over 2.75%. Goldcorp GG is down over 2.75%. Yamana Gold AUY is down over 2.60%.