Most people take it for granted that there is a lot of information on Wall Street that spreads via a grapevine of contacts. A broad investigation has ended in resignations of some high profile persons with charges pending. I don't know if it's even possible to clean up the sewer of Wall Street. Here is the latest.

http://news.cnet.com/14-more-charged-with-insider-trading/2100-1014_3-6250228.html