Most people read one oil price. There are dozens, and the relationship between them carries more information than the headline number.
On Wednesday, West Texas crude for October delivery settled at $102.43, down $3.40. Fine. Now look down the calendar: November $97.51, December $92.79, January $88.91, June 2027 $77.78, December 2027 $72.55.
That is a $30 slope, and it has a name.
What backwardation means
A market is in backwardation when nearby delivery costs more than distant delivery. It is the opposite of the normal state of affairs — usually you pay a little extra for later, to cover storage and financing.
When the curve inverts this steeply, it is generally a signal of physical tightness right now. Somebody needs barrels this month badly enough to pay a premium over barrels next year. And the depth of the slope says the market expects that tightness to ease — a war premium, essentially, with an expiry date the market has guessed at.
The inventory data supports the front end of that story. U.S. commercial crude stocks excluding the Strategic Petroleum Reserve fell 640,000 barrels to 423.4 million in the week ended Sept. 11 — a third consecutive weekly draw, though a smaller one than analysts expected. The reserve itself fell 403,000 barrels to 285 million. Stocks at Cushing, Oklahoma, the delivery hub, fell too.
Meanwhile refineries ran at 96.8% of capacity. That is close to flat out, and it is the number to watch: when refiners are already maxed, there is no spare capacity to answer a diesel shortage.
Why this matters for a household portfolio
Two practical consequences, neither of which requires a view on the oil price.
First, a backwardated curve is hostile to commodity funds. Many oil-linked exchange-traded products hold futures and must periodically sell the expiring contract and buy the next one. In backwardation, that roll is done at a lower price — which sounds good and is, but the front-month premium erodes as the contract approaches expiry. The point is simply that the return on an oil fund and the change in the oil price are different numbers, sometimes very different, and the curve is why.
Second, the curve is the market’s own answer to “should I chase this?” A market that prices $72 oil in late 2027 is telling you it does not expect $100 to be permanent. Buying an energy position at a front-month spike means paying today’s war premium for an asset the forward market says normalizes.
The other fuels
Diesel remains the tight one: NY Harbor ultra-low-sulfur diesel settled at $5.2465 a gallon. Gasoline futures rose slightly to $3.4850. Natural gas eased to $2.891 per million British thermal units — a reminder that “energy” is not one market, and a portfolio built on the assumption that it is will behave in ways its owner did not expect.
None of this is a forecast. It is a description of what the market is currently willing to pay, which is a more modest and more useful thing to know.