Yahoo Finance's Alexis Christoforous and Jared Blikre break down the latest market action. Here is the performance of S&P 500 energy sector stocks as of 11:15 am ET: ANDV Andeavor 1.79% APA Apache Corp -0.23% APC Anadarko Petro 0.44% BHGE Baker Hughes a GE Co Cl A -0.12% CHK Chesapeake Energy Corp 0.12% COG Cabot Oil & Gas Corp -1.76% COP ConocoPhillips 0.06% CVX Chevron Corp 0.02% CXO Concho Res Inc -0.67% DVN Devon Energy -0.32% EOG EOG Res -0.90% EQT Equitable Res -0.29% FTI TechnipFMC plc -0.48% HAL Halliburton Co -1.12% HES Hess Corp 0.61% HP Helmerich & Payne -0.30% MPC Marathon Petro Corp 1.96% MRO Marathon Oil Corp 0.24% NBL Noble Energy -0.03% NFX Newfield Exploration -0.11% NOV National Oilwell Varco Inc -0.44% OKE Oneok Inc 0.64% OXY Occidental Petro 0.10% PSX Phillips 66 1.98% PXD Pioneer Natural Res 0.40% RRC Range Res -0.10% SLB Schlumberger Ltd -1.07% VLO Valero Energy 1.95% WMB Williams Companies -0.07% XEC Cimarex Energy -0.03% XOM Exxon Mobil -0.37%