Trading term

What is Rollover?

Rollover (or 'rolling') is closing a futures position in an expiring contract and reopening it in a later-dated one, to keep your exposure past the near contract's expiry. Because futures contracts expire, any trader holding them long-term must roll — and the price gap between contracts (contango or backwardation) makes rolling cost or earn money.

A futures contract has a fixed expiry, so a trader who wants to maintain exposure beyond it can't simply hold — they must roll. Rolling means selling (or buying back) the near contract that's about to expire and simultaneously opening the same position in the next contract month. It's typically done in the days before expiry, when liquidity is shifting to the new front month. The position's direction and size are unchanged; only the contract month moves forward.

The cost or benefit of rolling depends on the shape of the futures curve. In contango, the later contract is pricier, so rolling means selling low and buying high — a roll cost that drags on returns. In backwardation, the later contract is cheaper, so rolling earns a roll yield. This is why 'roll yield' is a major component of long-term futures returns, often more important than the spot price move itself for continuously-held positions like commodity ETFs. Skilled traders time and structure their rolls to minimise cost or capture yield.

Rollover — keeping exposure past expiry
Front month (expiring)Next month (continues)ROLLsell the front, buy the nextRolling keeps exposure continuous past expiry

Because futures expire, holding exposure long-term means rolling: selling the expiring front-month contract and buying the next before expiry. The price gap between them is a roll cost or yield.

For example

You're long a crude oil future expiring this month at $80, and want to stay long. You roll: sell the expiring $80 contract and buy next month's at $83 (contango). Your exposure continues unchanged, but the $3 gap is a roll cost you paid to keep the position alive.

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Why it matters to you

Rollover is an unavoidable, recurring reality of holding futures — and its cost or yield can dominate long-term returns, especially for futures-based funds. Understanding that you're not just holding a price but repeatedly trading between contracts is what explains why futures positions can drift from the spot they track.

⚠ Roll costs compound silently

Traders focus on the spot price and forget the recurring cost of rolling. In persistent contango, each roll quietly sells low and buys high, and over many rolls the cumulative drag can overwhelm a modest spot gain. Ignoring the roll — treating a continuously-held future like a buy-and-hold stock — hides a real, compounding cost.

Frequently asked questions

What is rolling over a futures contract?

Rolling over is closing your position in an expiring futures contract and reopening the same position in a later-dated contract, to keep your exposure past expiry. The direction and size stay the same; only the contract month moves forward. It's how traders hold futures exposure long-term.

When do you roll a futures contract?

Usually in the days just before the near contract expires, as trading volume and liquidity shift to the next front month. Traders roll then to keep exposure continuous and to trade both legs while both contracts are liquid, avoiding the illiquidity of a contract right at expiry.

Does rolling cost money?

It can cost or earn money depending on the curve. In contango (later contracts pricier), rolling sells low and buys high — a roll cost. In backwardation (later contracts cheaper), rolling earns a roll yield. This roll cost or yield can be a major part of long-term futures returns.

Why do commodity ETFs underperform the spot price?

Largely because of rollover in contango. Futures-based commodity ETFs must continually roll contracts, and in a persistently upward-sloping curve each roll incurs a cost, dragging the fund's return below the commodity's spot price move over time.

Related terms

BackwardationBackwardation is when futures prices are lower for later delivery dates — the futures curve slopes downward. It often signals tight near-term supply or strong demand for immediate delivery. For futures holders it creates a positive 'roll yield,' as they sell pricier near-term contracts and buy cheaper later ones.BasisBasis is the difference between an asset's futures price and its current spot (cash) price. It reflects carrying costs, supply and demand, and time to expiry — and it converges to zero as the contract nears expiration, since a future about to settle must match the spot price. Traders watch basis to gauge conditions and to hedge.CFD (contract for difference)A CFD (contract for difference) is a derivative where you and a broker agree to exchange the difference in an asset's price between opening and closing the trade. You never own the underlying — you simply profit or lose on the price move, with leverage. CFDs cover stocks, indexes, commodities and crypto, and are popular outside the US, where they're banned.ContangoContango is when futures prices are higher for later delivery dates — the futures curve slopes upward. It usually reflects the costs of storing and financing an asset until delivery. Contango creates a 'roll cost' for anyone holding futures over time, as they repeatedly sell cheaper near-term contracts and buy pricier later ones.
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