Contract roll
The handover from an expiring futures contract to the next delivery month; on that day the headline price series starts tracking the new contract.
How it works
A futures contract is tied to a delivery month and stops trading on a set day. The contract closest to expiry is the front month, and it is usually the headline price in the news. When it expires, the headline moves to the next month. Investors who want to keep their position close the old contract and open the new one. Both moves are called the contract roll. On ICE, one Brent contract covers 1,000 barrels. Trading ends on the last business day of the second month before the delivery month.
An example: under the ICE rule, the November 2026 Brent contract expires on 30 September 2026. Anadolu Agency reported Brent at $102.35 for the 29 September close. The report does not name the contract month; on the ICE calendar the front month that day was November. According to the same agency, a day earlier, on 28 September, Brent had closed at $105.29 in the front month and $97.83 in the December contract. Once November expires, the headline switches to December. The $7.46 gap between those two same-day closes shows how large a step the roll can put into the headline.
The measurement trap is to read that step as a market move. If the nearby month is dearer than the next one, the headline falls by itself on roll day; in the opposite case it rises. Yet no contract has changed price. Data providers may not roll on the same day: some wait for the last trading day, others switch earlier. Two sources can therefore quote different Brent prices for the same date. A daily change should only be calculated between two closes of the same contract. A series should also state which month it tracks.
Why it matters here
In a crisis the futures curve steepens, because the shortage is crowded into the nearby month. The steeper the curve, the bigger the step on roll day. During a disruption such as Hormuz, headline Brent can drop several dollars in a day and be read as a sign that tension is easing. Supply has not changed at all. Before interpreting a price move, we check which contract we are looking at. On roll days we watch the change in the same contract and the spread between the two months. That spread shows how urgently the disruption is being priced.