Chevron posts loss of 31 cents a share vs 45 cents profit estimate

Analysts had expected Chevron to report earnings of about 45 cents a share on $28.72 billion in revenue, according to a consensus estimate from Thomson Reuters. Chevron CEO John Watson told CNBC's " Power Lunch" in December that he remained optimistic on the price of oil in 2016 and that the company can weather the "lower for longer" trend. —CNBC's Christine Wang and...