What is Contango? Definition, Formula, and Example
Contango is a futures market structure where longer-dated contracts trade above nearer-dated contracts and spot prices, creating systematic losses for long holders as contracts are rolled forward.
Definition
Contango is a futures market structure in which longer-dated contracts trade at higher prices than nearer-dated contracts, with the entire futures curve sitting above the current spot price. It is the market's way of pricing in carrying costs — storage, insurance, and financing — for commodities held over time. For non-storable assets like volatility, it reflects the risk premium demanded by sellers of future exposure. Contango is the "normal" state for most futures markets, and when contracts are rolled forward, holders of long positions systematically lose money to the higher price paid for the further-out contract.
How Contango Is Identified
A market is in contango when:
F(t₂) > F(t₁) > S, where t₂ > t₁
F(t) is the futures price for expiration t, and S is spot. The slope of the curve — the roll yield — is the expected loss per period of maintaining a long position by rolling contracts forward:
Roll yield ≈ (F(t₂) − F(t₁)) / F(t₁) per roll period.
For storable commodities, the theoretical no-arbitrage upper bound is the cost of carry:
F = S × e^((r + u − y) × T)
Where r is the risk-free rate, u is storage cost, and y is convenience yield. When (r + u) exceeds y, the market is in contango.
Worked Example
The VIX futures curve is the most famous perpetual-contango market. On a typical quiet trading day with VIX spot at 14.5, the futures curve prints:
- April contract: 15.2
- May contract: 16.8
- June contract: 17.9
- July contract: 18.6
This is steep contango. An investor holding VXX — an ETN tracking short-dated VIX futures — bleeds roughly 0.3% per trading day from rolling from the front month to the second month at a higher price. Annualized, that decay exceeds 60% in quiet volatility regimes. UVXY, the 1.5× leveraged version, has lost more than 99.99% of its value since inception through reverse splits and contango bleed.
Crude oil (WTI) typically trades in mild contango: spot $76, the June contract at $76.80, and December at $78.50 — about $2.50 over spot nine months out, roughly matching short-term rates plus storage.
When Traders Use It
Commodity producers hedge forward production by selling futures into a contango curve, locking in higher prices than spot. Speculators avoid long-only positions in contango ETFs for buy-and-hold exposure because the decay eats returns.
The carry trade in volatility is a direct contango play: systematically short the front-month VIX future, collecting the roll yield as the contract converges toward lower spot VIX. Funds like SVXY institutionalize this trade. It wins 80%+ of the time and blows up spectacularly during volatility spikes — see February 5, 2018, when XIV lost 96% overnight and was liquidated.
Spread traders exploit kinks in the curve: if July trades unusually rich versus June and August, they short July and long a June-August basket, betting the hump flattens.
Limitations and Common Misconceptions
Contango does not predict the direction of the underlying. A market in steep contango can still rally sharply; VIX has spiked to 80+ from contango states. The curve prices the term structure of expectations and risk premium, not the path spot will take.
"Super contango" — extreme contango exceeding storage economics — indicates severe oversupply. In April 2020, front-month WTI traded negative while June contracts held above $20 because physical storage at Cushing, Oklahoma was full.
Finally, contango is not constant. Markets flip to backwardation during supply shocks, demand spikes, or fear events. VIX futures went sharply backwardated in March 2020, March 2023, and August 2024 — exactly when short-vol traders lost the most.