Maybe  someone is trying to  keep  PRB down in  order to  make an oportunistic  deal/ move  on  the  probe properties?

 or.

Maybe the  market  is  just  jumpy  and  is throwing  out the  babies  with the  bathwater..... In  any  case  bought a few  more today.... should be  getting  close to a  board  nomination  soon, if I  keep  buying the  stock...LOL