These oil stocks are taking the worst beatings after Saudi Arabia shocks the energy market

Apache Corp Apergy Corp Callon Petroleum Company Cimarex Energy Core Laboratories Ord Shs Denbury Resources Devon Energy Diamondback Energy EOG Resources Green Plains Inc Halliburton Co Helix Energy Solutions Group Hess Corp Laredo Petroleum Holdings Inc Marathon Oil Matador Resources Company Murphy Oil Nabors Industries Nasdaq Composite Newpark Resources Noble Corp Noble Energy ONEOK Oasis Petroleum Inc Occidental Petroleum Oceaneering International Oil States International Patterson-Uti Energy Pdc Energy Inc Penn VA Corp Pioneer Natural Resources Propetro Holding Corp QEP Resources Sm Energy Company Tetra Technologies Transocean Ltd U.S. Silica Holdings Inc Whiting Petroleum Corp Wpx Energy Inc