I think you will find a correlation between SP activity and market cap for all the area plays.
IMO Prb went up this morning because on a MC point of view it had lagged behind the rest. You'll find that the big boys are covering their bets and acquirring shares in the area plays that are the lowest MC. That 's why FNC came off their high yesterday ... the MC got out of line... so the area plays will take their turn...first it was FWR ...then FNC...then BMK....then SPQ...then PRB....then back to FWR and the cycle repeats until.....
as it should be the NR is released and we all buy NOT
Rockaur