For years, we've been warning that the economics of the US 'shale revolution' were suspect. Namely, that they've only been made possible by the new era of 'expensive' oil (an average oil price of between $80-$100 per barrel). We've argued that many players in the shale industry simply wouldn't be able to operate profitably at lower prices. Well, with oil prices now suddenly sub-$60 per barrel, we're about to find out. Using the traditional corporate income statement, it is difficult to determine if shale drilling companies make money. There are a lot of moving parts, some deliberate obfuscation at some companies, and the massive decline rates make analysis difficult – since so much of reported profitability depends on assumptions made regarding depreciation and depletion. So, can shale oil be profitable? If so, at what price? And under what conditions?