In more than half the states, gas is selling for less than $2 a gallon.

One strategy: Buying oil then storing it in tankers until prices go back up.

Houston furniture dealer ties a tidy potential refund to the price of oil.

Europe has deflation fears, but falling prices caused by cheap oil are a stimulus.

If a tax is not imposed on carbon-dioxide emissions, gas is artificially underpriced.

A lousy crop means high prices. At least for the real thing.

Oil, whose price has halved in the past year, accounts for 95 percent of the country’s exports and 45 percent of the government’s budget.

Many states are running out of money to maintain highways.

With gas prices down, we're tilting toward bigger cars but still driving less.

Billionaire oil producer Harold Hamm predicted a "pretty quick" recovery for prices.