Thursday’s Pre-Market Insights: GPRO, NBS, VRX, CTRP By: TalkMarkets May 28, 2015 at 09:45 AM EDT Thursday’s Pre-Market Insights: GPRO, NBS, VRX, CTRP. Read More >> Related Stocks: Ctrip.com Intl Ltd Gopro Inc Cl A Valeant Pharmaceuticals International, Inc.