Oil

Global oil markets are still well supplied, however, thanks in part to a spike in U.S. output.

Many U.S. refiners rely on the type of oil that Venezuela produces.

Investors perceive oil supply to be fairly tightly balanced against demand.

Earnings at American Airlines grew in 2019, while profits at Southwest and JetBlue dropped double-digits.

A massive technological breakthrough in the Gulf of Mexico is boosting productivity.

Oil prices have been supported by production cuts led by OPEC.

Analysts say production cuts by OPEC are likely to support oil prices.

Tempering support for prices, however, are signs of weakening demand and surging U.S. output.

Former Federal Reserve chairs and Nobel Laureate economists rally around a carbon tax to address climate change.

OPEC and non-members plan to cut production by a joint 1.2 million bpd this year.

ConocoPhillips shares rose more than 10 percent in 2018.

China's National Development and Reform Commission offered some support on Tuesday.