Morning Market Losers

Pain Therapeutics (NASDAQ: PTIE) shares dipped 60.72% to $1.63 after Pfizer (NYSE: PFE) announced that it will discontinue deal on REMOXY and Pain Therapeutics will regain full development and commercial rights to REMOXY.DURECT (NASDAQ: DRRX) shares fell 43.88% to $0.78 after Pfizer discontinued deal on REMOXY.Akebia Therapeutics (NASDAQ: AKBA) shares declined 35.90% to $12.64 after the company reported positive top-line results from its Phase 2b study of AKB-6548 in non-dialysis patients with anemia related to chronic kidney disease.Sarepta Therapeutics (NASDAQ: SRPT) shares tumbled 34.55% to $15.42 on the FDA requirement of additional data from Sarepta on Eteplirsen. Precision Drilling (NYSE: PDS) shares slipped 9.70% to $7.99. Precision Drilling reported a 79% gain in its third-quarter profit and lifted its quarterly dividend by 17%.Regulus Therapeutics (NASDAQ: RGLS) shares slipped 8.14% to $15.92 after jumping 19.19% on Friday.Huntsman (NYSE: HUN) shares declined 4.83% to $23.32. Huntsman reported upbeat earnings for the third quarter. GoPro (NASDAQ: GPRO) shares dropped 4.64% to $68.58 after falling 9.15% on Friday.