Big copper that I've heard pushing the copper like bhp, the...

Big copper that I've heard pushing the copper like bhp, the chile miners, Reo and Glencore, all having problems with production costs and futures. So the small upstarts churning out 26ktpa @<$1.70 must be making money. right?
In this regard, Juniors like Tiger and Finders should be bulletproof. Lowest cost of production will survive.