FDA Ruling Shakes Up Biotech: Gilead, AbbVie And More By: Benzinga via Benzinga October 22, 2015 at 16:31 PM EDT Biotechs have had a tough week. On Wednesday, stocks plummeted after Citron Research released a new report classifying Valeant ... Read More >> Related Stocks: AbbVie Enanta Pharmaceutica Express Scripts Holding Gilead Sciences Horizon Therapeutics Valeant Pharmaceuticals International, Inc.