Black Gold vs Americas Oil Exploration and Production Companies

Anadarko Petroleum Corporation - APC,
Chevron Corporation - CVX,
ConocoPhillips - COP,
Continental Resources - CLR,
Devon Energy - DVN,
ExxonMobil - XOM,
Hess Corporation - HES,
Marathon Oil - MRO,
Murphy Oil - MUR,
Occidental Petroleum - OXY,
Plains Exploration & Production - PXP