Why opec will lose:
Fracking may be unsustainable at $50 a barrel but other opec countries have economic instability while they wait for fracking to fail.
In the mean time, the u.s. benefits from oil profits not funding the iranian nuclear program, islamic state terrorism and russian military modernization.
The, u.s. also benefits from a boost to their economy from lower oil prices.
When oil bottoms out and starts to rise again fracking will resume. Oil revenue countries can't keep oil prices low forever. Not even the saudis. Almost all the opec nations are running budget defecits while they wait.
The longer they wait the lower the break even point for oil fracking becomes as new and better technologies emerge.
main points from a well written article:
http://www.mycentraljersey.com/story...king/20847911/