6 reasons biotech stocks may soon tank By: MarketWatch February 26, 2015 at 11:08 AM EST Risks are piling up as the sector has risen 60% in less than a year, writes Michael Brush. Read More >> Related Stocks: AbbVie Alnylam Pharmaceuticals Amgen Biomarin Pharmaceuticals Cigna Corp Express Scripts Holding Five Prime Thera Gilead Sciences Hospira Johnson & Johnson Nasdaq Biotechnology Ishares ETF Sangamo Therapeutics Vertex Pharmaceuticals Ziopharm Oncology IN