Russia’s ex-finance minister says the country is in a “full-fledged economic crisis” thanks to falling oil prices and Western sanctions.

The oil price plunge is hurting America’s shale industry, but U.S. consumers are loving it.

The bear crude market will hurt some U.S. shale producers, but energy security is rising both domestically and globally.

New well permits fell almost 40 percent from October to November as shale producers adjusted course to account for plunging oil prices.

Cheap oil is corroding the economic case for an independent Scotland.

By rejecting production cuts, OPEC is preparing to go toe to toe with the American shale boom.

Russia’s finance minister said that the combination of sanctions and falling oil prices will cost Moscow up to $140 billion a year. Of that, oil prices are by far the bigger factor.

Moscow is considering cutting its oil output in an attempt to stop the global price slide, but may not be up to the task.

Lower oil prices spell trouble for the world’s petrostates, especially for sanctions-hit Russia.

Plunging oil prices have made a number of unconventional American plays unprofitable, but efficiency gains mean shale is still hale.