General Motors posted better fourth quarter revenue and adjusted earnings than analysts had expected, as it recorded billions in one-time charges because of recent changes to the automaker's business plans.

U.S. stocks ended a choppy trading session mixed on Friday as oil prices retreated while investors watched diplomatic developments in the Middle East.

Tesla's earnings report and call Wednesday shed light on the electric vehicle maker's plans for new versions of its self-driving software and its humanoid robot, Optimus.