Oil Is Plentiful, Demand Weak. Why Are Gas Prices Going Up?

Storage tankers across the globe may be brimming with oil that no one is buying because of the global economic downturn, but the traditional laws of supply and demand don't always apply to oil prices. Drivers have faced rising prices at the gas pump in recent months, as investors and oil-producing countries hoard supplies in anticipation of a global economic recovery later this year.