Refining Margin.
In plain English
The refining margin is what a refinery earns from converting crude oil into finished products, after subtracting the cost of the crude and the cost of running the plant. It is closely related to the crack spread but accounts for real operating costs like energy and labor, not just the price gap between crude and products. When margins are fat, refineries run at full capacity and gasoline supply grows; when margins are thin, some capacity idles. This is a big reason pump prices and crude prices can drift apart.
01Why it matters
Refining margins decide how much gasoline refineries want to make, so they help explain why the pump does not simply follow the price of oil.
02The math, step by step
Crude falls, but a cold snap spikes the natural gas that powers refineries. Higher operating costs shrink the refining margin, so gasoline supply and pump prices do not fall as much as oil did.
03What this is NOT
The refining margin is NOT exactly the crack spread. The crack spread is a simple price gap between crude and products; the refining margin also subtracts real operating costs like energy and labor.