Here's a case of someone using double-secret information to play the market: http://www.slate.com/articles/business/the_dismal_science/2008/10/they_made_a_kill

Here's a case of someone using double-secret information to play the market: http://www.slate.com/articles/business/the_dismal_science/2008/10/they_made_a_killing.html http://www.slate.com/articles/business/the_dismal_science/20... I bet this sort of thing happens all the time.