Contango is a market condition where the future price of a commodity is higher than its current spot price — an upward-sloping forward curve. It sounds like a piece of trading jargon, but for a shipping investor it is one of the most useful leading indicators there is. A steep oil contango is often the spark that lights up the tanker market.
This entry explains what contango means, how it differs from backwardation, the economics of storing a commodity to capture it, and — most importantly for my readers — why the shape of the oil forward curve can move freight rates and tanker share prices.
In a contango market, buyers are willing to pay more for delivery in the future than for delivery today. The forward curve slopes upward. This usually reflects the cost of carry — the expenses of holding a physical commodity over time:
When the spot price is depressed — often because of an oversupply or a sudden demand shock — the gap between cheap spot barrels and higher forward prices can widen into a steep contango. That gap is where the opportunity, and the shipping demand, comes from.
| Condition | Curve shape | Forward vs spot | Typical cause |
|---|---|---|---|
| Contango | Upward-sloping | Forward > spot | Oversupply, weak prompt demand, low spot prices |
| Backwardation | Downward-sloping | Forward < spot | Tight supply, strong prompt demand, scarcity premium |
The two are opposites. Backwardation signals a market that wants the commodity now and is willing to pay a premium for immediate delivery. Contango signals a market that is comfortable on prompt supply and is effectively paying others to store the surplus until it is needed.
This is the part that matters for tanker investors. When the contango is steep enough that the forward premium exceeds the cost of chartering a vessel to hold crude at sea, traders start using tankers as floating storage. Very Large Crude Carriers (VLCCs) — each holding around two million barrels — get taken out of the transport market and parked, full, waiting to deliver into the higher forward price.
Two things then happen at once:
This is why I watch the oil forward curve as a tanker indicator, not just an oil indicator. A move into steep contango — as happened dramatically in 2020 when prompt demand collapsed — can send VLCC day rates from breakeven to six figures in weeks. The 2020 episode was the most extreme example in living memory, but milder contango-driven storage demand recurs whenever prompt supply runs ahead of demand.
A contango-driven storage boom contains the seeds of its own end. As cheap spot barrels are bought up and stored, prompt supply tightens and the spot price recovers. Eventually the curve flattens, the storage arbitrage disappears, and stored crude is released back into the market. When those barrels are sold and the tankers come back into the transport fleet, vessel supply jumps and freight rates can fall just as quickly as they rose.
For an investor, this is the warning embedded in the opportunity: contango-driven tanker rate spikes are powerful but temporary. They are a trading signal for the cycle, not a structural shift in demand. I treat them as a reason to understand a shipping company's balance sheet and breakeven rates — the operators that survive the down-leg are the ones with low leverage and a young fleet.
The concept applies to any storable commodity — natural gas, refined products, metals, even grains. Natural gas markets show a strong seasonal contango (summer-to-winter) that drives storage injection economics, which in turn affects LNG and gas infrastructure demand. The principle is always the same: when the forward curve pays you more than the cost of carry, somebody will store the commodity — and storage often means ships, tanks and pipelines that investors can own.
For more on the shipping side of this dynamic, see also: Charter Rates, Baltic Dry Index, and Tanker Investing.
Marco Bozem
Investor & Analyst | Hard Assets, Dividends, Shipping | MB Capital Strategies
Marco analyses shipping, mining and energy stocks with focus on freight cycles, balance sheet strength and dividend sustainability. All analysis based on public data. Not investment advice.
Contango Backwardation Floating Storage Tanker Rates Oil Markets
Related: Charter Rates · TCE Rate · Baltic Dry Index · Tanker Investing · LNG Stocks