Exercising options really isn't a good thing (or a bad thing).  If he exercised the options, there's probably a holding period (like 30 days or so) before he can sell, which means there is a belief the share price is stable. However, there's also a fear the price may have peaked as well, thus "strike while the iron is hot".  It's really a neutral move, probably based on a personal need more than anything.

 

Regardless, PRB will continue to go up.  Spacemonkey is just playing with your gourds - just ignore him/her.  Seems whenever space says something, the stock eventually moves the other way.  Just the puppetmaster trying to pull your strings.