Re: I always wonder how many people get away with it
I'm tempted to dig into the research to see if anyone's experimented with proxies for successful (i.e. not directly detected) insider training, to get an idea of what the success rate might be.
I also wonder what kind of black market exists for insider information, and what mechanisms it uses to sanction defectors (people who provide false or misleading information; or if payment comes after confirmation, buyers who don't pay). An escrow system would probably work but that would require a trusted third party. Such a market would likely be safer (but with a correspondingly smaller reward) than using insider information directly. It seems like an obvious idea, so I'd expect one exists.