An oil barrel stands in spill at a Petroleos de Venezuela SA (PDVSA) facility in the Orinoco Belt of El Tigre, Venezuela. (Photographer: Bloomberg)

Oil’s 2019 Weakness Has Roots in 2018’s Strength

(Bloomberg Opinion) -- Oil has a demand problem. You can see it, most obviously, in headline crude oil prices, which slumped again Wednesday morning. You can see it in Asian refining margins and ph...