Contango and backwardation explained

Published 2026-09-05; updated 2026-09-05.

Contango is a market state in which the price for delivery later is higher than the price for delivery now; backwardation is the reverse, with later delivery cheaper than immediate delivery. Both words describe the shape of a forward curve, which is the line joining the prices agreed today for each future delivery month.

The shape matters because it says something about physical scarcity that the price level alone does not. A commodity can be expensive and still in contango, or cheap and still in backwardation. Direction and shape are different questions.

Why does the curve slope the way it does?

Start with storage. If you can buy a commodity today, keep it and sell it in a year, then the price for delivery in a year cannot rise much above today’s price plus the cost of keeping it. That cost, the cost of carry, is warehouse or tank rent, insurance, losses in storage, and the interest on the cash tied up.

Suppose crude oil sits at the August 2026 Brent level of $90.90 per barrel (World Bank Pink Sheet), and assume storage, insurance and interest come to $5 a barrel over a year. That $5 is an assumption used to show the arithmetic, not a published figure. If the price for delivery a year out were $99, a trader could buy a barrel now, pay $5 to keep it, deliver it against the later contract and clear about $3. Doing that in size sells the far month and buys the near one, which flattens the curve back toward $95.90. This is arbitrage, and it caps contango at roughly full carry.

Nothing caps backwardation the same way. To profit from later delivery being cheap, you would need to sell a barrel you do not have and buy it back later, which requires borrowing the physical commodity from someone who holds it. When inventories are thin, nobody will lend. So a market can stay backwardated for a long time, and steeply, because the correcting trade is unavailable. That asymmetry is the single most useful thing to know about curve shape: contango is bounded, backwardation is not.

The economic reading follows. Contango usually means supply is comfortable and inventories are building, so the market pays someone to hold goods it does not need yet. Backwardation usually means the opposite: buyers who need the commodity in their plant next week will pay a premium over a barrel promised in six months, because a promise cannot be refined. Economists call that premium the convenience yield.

Contango is capped by the cost of storing the goods; backwardation has no such ceiling, because you cannot easily borrow a commodity nobody has spare.

A worked example

The Pink Sheet publishes spot and near-term benchmarks, not forward curves, so the cleanest visible trace of carry economics is the seasonal pattern in US natural gas, a commodity whose storage is expensive and physically limited.

In August 2026 US Henry Hub gas was quoted at $2.77 per million British thermal units (World Bank Pink Sheet). In August 2025 it was $2.91, in December 2025 $4.25, and in January 2026 $7.58 per million British thermal units. Summer gas is cheap because demand is low and injection into storage is under way; winter gas is dear because heating load arrives and the salt caverns and depleted fields cannot be refilled quickly.

That repeating shape is the reason the US gas forward curve is normally in contango from summer months into the following winter: a buyer who wants January gas in August must pay someone to inject it, hold it and withdraw it. When storage fills faster than expected, the winter premium narrows because the market needs fewer volunteers to store. When a cold spell drains inventory, the prompt month can jump above the months behind it, and the curve flips into backwardation at the front.

Compare the same month across regions and the storage story separates from the price story. In August 2026 European TTF gas stood at $21.11 and Japanese LNG imports at $13.94 per million British thermal units, against Henry Hub at $2.77 (Pink Sheet). Those gaps are about liquefaction and shipping, not carry, which is why benchmarks have to be read one market at a time. The monthly series are on the natural gas price page, and the production and pipeline geography is on the natural gas commodity page.

What the shape does to a return

For anyone holding futures contracts rather than the physical good, curve shape is not decoration; it is a running cost or a running income. A position that never takes delivery must be rolled: sell the expiring month, buy a later one. In contango the later month is dearer, so each roll gives up a little, an effect known as negative roll yield. In backwardation the later month is cheaper and each roll gains.

This is why two investors can hold the same commodity over the same year and end with different returns, and why an index that tracks a curve is not the same as owning the spot price. It also explains why producers and consumers, who deal in the physical good, care about shape for a completely different reason: it tells them whether the market will pay them to store or pay them to release. The mechanics of rolling and expiry are covered in how a futures contract settles.

Cite as: Commodity Origins, "Contango and backwardation explained", https://commodityorigins.com/learn/contango-and-backwardation/ (CC BY 4.0).