Oil historian and economist Daniel Yergin has a forecast for where the price of crude is headed: all over the place. The much debated shape of the oil-price curve will take the form of a W as crude is whipsawed by mixed signs from a rattled U.S. shale boom, while Saudi Arabia refuses to balance a global supply glut, Yergin said in an interview on Tuesday. As spending cuts are forecast to begin easing production from shale next month, the fate of world oil markets is largely in the hands of a myriad of U.S. wildcatters, all with different strategies and an unusual ability to respond quickly to changed circumstances. Ramping down will be quicker and easier than stepping up production as prices recover, said Yergin, vice chairman of IHS Inc. Increased supply will renew downward pressure on prices and volatility will be exacerbated by storage and investment decisions, […]