Insider trading scandals common with biotechs:

Over the past two years the SEC has found that the life sciences industry has been rife with insider trading cases. With stock prices likely to soar or plunge on the progress of key drugs, a tip can be worth an overnight fortune for Wall Street players and company execs. And there's been a growing focus on expert-network firms, which provided investigators with rich hourly fees in exchange for connecting them to traders. If the widening web of investigations can take down one of the most prominent investigators in his field, there's no telling just how many of these relationships could be at the center of ongoing probes.

- here's the report from Bloomberg