DALLAS—The big plunge in crude prices is taking a toll on Big Oil.
Exxon Mobil Corp. said Tuesday that fourth-quarter profit fell 58 percent to $2.78 billion. It was the oil giant’s smallest profit since the third quarter of 2002.
Exxon’s core exploration and production business lost money in the U.S. and international earnings plummeted by nearly two-thirds. One of the few bright spots, Exxon’s refining operation was more profitable than a year ago. That helped Exxon avoid the fate of rival Chevron Corp., which lost money in the fourth quarter.





