Defining Contango

Contango describes a situation where futures contracts with a later expiry date trade at a higher price than contracts with a nearer expiry date, reflecting the accumulated cost of carry over the additional time until the later contract’s settlement, and this is generally the more common, ‘normal’ term structure for index futures under typical market conditions.

Defining Backwardation

Backwardation describes the opposite situation, where futures contracts with a later expiry trade at a lower price than nearer-term contracts, a less common condition for equity index futures that can emerge during periods of unusual dividend timing, elevated near-term demand, or specific market stress conditions distorting the normal cost-of-carry relationship.

Why Index Futures Typically Show Contango

Under normal conditions, positive interest rates mean holding a position further into the future accrues more cost of carry, naturally producing a contango term structure where later-dated contracts trade at successively higher prices, consistent with the fair value calculation discussed in a dedicated guide extended across multiple expiry months.

How Dividend Timing Can Produce Temporary Backwardation

When a significant concentration of dividend payments from index constituents falls within the period covered by a near-term contract but not a further-dated one, the near-term contract’s fair value calculation absorbs a larger dividend deduction, which can occasionally produce a temporary backwardation-like pattern around specific dividend-heavy periods.

Reading the Term Structure Across Multiple Expiries

Examining the pricing relationship across several successive expiry months simultaneously, rather than just the nearest two contracts, provides a fuller picture of the term structure and can reveal whether any observed contango or backwardation reflects a broad, sustained pattern or a temporary, localised distortion around a specific expiry.

What the Term Structure Can Signal About Market Conditions

A steepening contango, with far-dated contracts trading at an increasingly large premium to near-term ones, can sometimes reflect rising interest rate expectations or reduced near-term hedging demand, while a flattening or inverting term structure toward backwardation can reflect elevated near-term uncertainty or unusual demand concentrated in the nearest contract.

Term Structure and the Rollover Decision

As discussed in the dedicated rollover guide, the specific shape of the term structure directly determines the cost or benefit of rolling a position from an expiring contract into the next month’s contract, with a steep contango making it more expensive to roll a long position forward and a backwardation making it cheaper or even beneficial.

Comparing Index Futures Term Structure to Commodity Futures

While the contango and backwardation terminology originated in commodity markets, where storage costs and supply-demand imbalances for physical goods drive the term structure, the underlying logic for equity index futures is somewhat simpler, being driven primarily by interest rates and dividend timing rather than the physical storage and convenience yield considerations relevant to commodities.

Practical Monitoring of Term Structure for Active Traders

Active index futures traders benefit from periodically checking the term structure across available expiry months, particularly around major dividend-heavy periods for index constituents and ahead of significant interest rate decisions, since both factors can meaningfully shift the normal contango pattern that index futures typically exhibit.

Why This Matters More for Systematic and Rolling Strategies

Traders and funds running systematic strategies that maintain continuous futures exposure through repeated rolling, rather than trading a single expiry and closing out, are particularly sensitive to term structure effects, since the cumulative cost or benefit of rolling through a persistent contango or backwardation compounds meaningfully over many successive rollover cycles.

Tracking Term Structure Changes Over Successive Expiries

Recording how the term structure has looked at the start of each successive expiry cycle over time builds a genuinely personal, evidence-based reference for what counts as a normal versus an unusually steep or flattened pattern for the specific index a trader follows most closely.

The Bottom Line

Contango and backwardation describe the relationship between near-term and far-term index futures prices, with contango being the typical pattern under normal interest rate conditions and backwardation emerging occasionally around unusual dividend timing or market stress. Understanding this term structure helps traders anticipate rollover costs and interpret what the broader futures market is signalling about interest rate and dividend expectations.