Business Insider | This week's collapse in oil prices has been months in the making Business Insider On Monday, West Texas Intermediate crude oil fell nearly 8% as part of a global sell off in virtually all assets after the Greece referendum results Sunday. And then on Tuesday, oil prices fell another 4% before regaining some ground in late morning trade. Why oil could revisit its lows and then some FT Explainer: Oil approaches bear market Greek crisis hits home in Alberta, helping create toxic brew for oil |