Daniel Yergin is the vice-chairman of Colorado-based consultancy IHS Inc. an author on energy, international politics and economics and has been described as the energy industry’s most prominent chronicler. His book The Prize: The Epic Quest For Oil, Money & Power, a history of the global oil industry, won the Pulitzer prize for non-fiction in 1992. He talked MoneyBeat through the factors hitting the oil market, and how he sees them playing out.