Riding High, Biotech Firms Remain Wary. Pollack, Andrew, Biotechnology and Bioengineering, Drugs (Pharmaceuticals), Stocks and Bonds, JPMorgan Chase & Company, Food and Drug Administration, Vertex Pharmaceuticals Inc, Juno Therapeutics Inc, ZIOPHARM Oncology Inc, Intrexon Corporation, Biogen Idec Inc, bluebird bio Inc.