Morning Market Gainers

Prothena Corporation plc PRTA shares jumped 37.39% to $40.16 on news that the company's Phase I study of its treatment for Parkinson's disease met its primary end point for safety. Envivio, Inc. ENVI shares rose 32.47% to $2.04. Envivio reported a Q4 loss of $0.02 per share on revenue of $12.7 million. Ctrip.com International Ltd. CTRP shares surged 20.77% to $55.72 after the company reported a narrower-than-expected loss for the fourth quarter. Viggle Inc. VGGL shares climbed 18.75% to $1.72 after the company's release confirmed a received bid from Robert FX Sillerman for the purchase of 25% of the company's Wetpaint unit for $10 million in cash. Biogen Idec Inc. BIIB shares gained 8.41% to $470.12 on positive Alzheimer's study results. Intercept Pharmaceuticals, Inc. ICPT shares gained 6.15% to $306.24 on positive Phase 2b Flint trial data. Nike, Inc. NKE rose 4.56% to $102.80 after the company reported better-than-expected earnings for its fiscal third quarter. Darden Restaurants, Inc. DRI shares climbed 1.50% to $65.84 after the company after the company reported stronger-than-expected earnings for the third quarter.