Black gold, paper barrels and the oil price bubble of 2008. The spike in the oil price to almost $150 per barrel in summer 2008 was the last great excess of the crazed noughties bull markets, staged even as stock markets crumbled worldwide. Contrary to entrenched establishment opinion still embraced by many, Petromania proves this oil price blowout was a classic 'speculative bubble', but driven primarily by new modes of financial speculation. Demolishing widespread, oft-repeated but incorrect arguments that such trade in 'paper barrels' cannot move oil prices, Petromania details how this 'financialisation' of the oil markets meshed with other trends to create a moment just a year ago that saw investment banks and hedge funds collectively wield more power over the price of 'black gold' than OPEC or any multinational oil company. It also shows how regulatory blindness to the 'dark matter' of modern finance caused so many to confuse fantasy with reality for so long. Petromania matters not just because fortunes were won and lost in oil's dizzying ascent and crash, but because this bubble spelled misery for ordinary people worldwide, destabilised developing world governments and delayed interest rate cuts desperately needed to address the ongoing global recession.