Fueled by incredible innovation and rapid revenue growth, the S&P 500 biotechnology index skyrocketed more than 400% between July 2010 and July 2015. Biotech superstars like But last week, biotechs imploded after Hillary Clinton tweeted her outrage about unbelievable price hikes by a drug maker run by Martin Shkrelli, the former hedge fund manager who's since been dubbed the most hated man in America.