Why do some people get investigated for insider trading, yet insider trading seems to be common and perfectly normal in other situations?

I don't totally understand how the rules for this work. You can pull up a ton of insider trading data on finviz and whatnot, and it doesn't seem like there's anything wrong with it .. but yet when some people do it (Intel's CEO as a recent example), they get investigated for it? What's going on here?

Submitted January 09, 2018 at 11:58AM by NessInOnett http://ift.tt/2qKuKfc