Here is the problem as I see it....
I am opposite of what Joe believes. I think these OPEC countries CAN'T stop pumping. They only have one revenue source and radicals beating at their door. They stop pumping and their meager economy slows even more. That gives the radicals even more leverage with a people that is already oppressed by royalty and religious leaders.
Completely agree and add in Iran making up for lost time and $$. IMO the drop in cost has been factored in since they started talking about lifting the Iran sanctions. Countries know Iran would do this to build themselves up financially, economically and militarily and that they have the mentality now to never ever let other countries push them around. Best way to do that is to put other countries out of the oil business.