The Two Prices the Whole Oil Market Is Quoted Against
Oil is not one price but many, anchored to a few benchmarks. Brent and the main American benchmark are the two references most of the world trades against, and the gap between them tells a story.
Why Oil Needs Benchmarks
There are hundreds of grades of crude oil, differing in density, sulphur and location. Pricing each one from scratch would be impossible, so the market uses benchmarks: a few reference crudes whose prices are widely quoted, with every other grade priced as a premium or discount to one of them.
Two benchmarks dominate. Brent, based on North Sea crude, is the reference for much of the world. The main American benchmark, based on crude delivered to a hub in the United States, references North American oil. Most crude traded globally is priced against one of these.
Almost no one pays the benchmark price exactly. They pay the benchmark plus or minus a differential for their specific grade and location, which is why the benchmarks matter far beyond the oil they directly represent.
Why Two Prices Differ
The two benchmarks are different crudes in different places, so their prices are not identical, and the gap between them, the spread, moves with the forces affecting each.
| Factor | Effect on the spread |
|---|---|
| Local oversupply at one hub | Depresses that benchmark relative to the other |
| Pipeline or export constraints | Traps oil inland, widening the gap |
| Shipping and transport costs | Reflects the cost of moving oil between markets |
| Regional demand differences | Pulls one benchmark relative to the other |
The American benchmark is priced at an inland hub, which means oil there must be transported to reach the coast and the export market. When production inland grows faster than the pipelines to move it, oil backs up at the hub, depressing the American benchmark relative to the seaborne Brent price. The spread between the two therefore reflects the cost and constraint of getting oil from where it is produced to where it is consumed.
What the Spread Reveals
Because the American benchmark is landlocked and Brent is seaborne, the spread between them is a window into infrastructure and logistics. A wide spread, with the American benchmark trading well below Brent, signals that oil is trapped inland by insufficient pipeline or export capacity, unable to reach the higher priced global market.
When this happened during rapid growth in American production, the inland benchmark traded at a substantial discount to Brent, because the oil could not physically get out to where it was worth more. As pipelines and export capacity were built, the constraint eased and the spread narrowed. The spread is thus a real time indicator of whether the infrastructure can keep up with production.
The Physical Delivery Point
A subtlety that matters enormously is where a benchmark settles physically. The American benchmark futures contract settles by physical delivery at a specific inland hub. This means holders of an expiring contract who do not want to take delivery must sell before expiry, and the availability of storage at that hub affects the price.
This physical settlement was behind the extraordinary episode when the expiring American contract price briefly went negative. Holders faced taking delivery of oil at a hub where storage was full during a demand collapse, and rather than accept barrels they could not store, they paid to escape the contract. Brent, structured differently, did not go negative. The divergence showed how much the physical delivery mechanics of a benchmark matter.
Why the Choice of Benchmark Matters
For a producer or consumer, which benchmark their oil is priced against affects what they receive or pay. A producer whose crude is linked to a benchmark that is depressed by local constraints earns less than one linked to a benchmark trading at the global price, even for similar oil.
This is why access to export infrastructure is so valuable, since it lets a producer sell against the higher global benchmark rather than a discounted local one. The benchmark is not just a number but a determinant of who captures the global price and who is trapped selling at a local discount.
The Bottom Line
Oil trades against a handful of benchmarks, chiefly Brent and the main American reference, with nearly every grade priced as a differential to one of them. The two differ because they represent different crudes in different locations, and the spread between them reveals the cost and constraint of moving oil, widening when production is trapped inland and narrowing as infrastructure catches up. The physical delivery mechanics of each benchmark matter enough that one went negative while the other did not, and which benchmark a producer sells against determines whether it captures the global price or a local discount.