Reuters | Oil prices slip as focus shifts to details of OPEC deal Reuters The European oil and gas index .SXEP was up 4 percent on Thursday and the pan-European STOXX 600 index rose 2 percent. But oil prices retreated as scepticism over the effectiveness of the deal led to profit taking. Benchmark Brent crude futures LCOc1 ... Oil Prices Hold Gains Amid OPEC Deal Skepticism |