Evening edition · Friday, 30 October 2026
$117.38 on expiry day, and a tanker that kept sailing
Brent's December contract went out on a high after a limpet-style attack in Hormuz. The same contract also shows a spread the headline misses: the next month is about $5 cheaper.
The tanker was outbound in the Strait of Hormuz, 25 nautical miles north-east of Oman’s Khasab, when a small boat attached two explosive devices to its hull on Thursday, the UK Maritime Trade Operations centre said2. The blasts started a fire in the engine room and left the vessel temporarily immobilised2. By Friday UKMTO said the crew were safe, the fire was out, there was no environmental impact and the ship was continuing to its next port of call2. Nobody has said who did it2.
Oil reacted on the contract with the least time left. Brent futures for December, which expired on Friday, rose $2.50, or 2.2%, to $117.38 a barrel in early trade1. The more active January contract gained $1.39 to $112.19, and US WTI rose $2.04 to $104.091. Brent was on course to finish October 13% higher and WTI 15%, a fourth straight monthly gain1.
Desk arithmetic: the expiring December contract stood $5.19 above January. A front month that much dearer than the next one usually means buyers are paying for barrels they need now. It tells you less about where prices will be by Christmas.
Two other details from the same report are worth your attention. ExxonMobil and Chevron have cancelled plans for their executives to attend next week’s big oil show in the United Arab Emirates, according to two Reuters sources1. And Iran has received a letter from Vice President JD Vance but has not answered it, Iran’s semi-official Tasnim agency said1. One is a travel diary and the other an unanswered letter. Neither is a market forecast, but both say something about how safe the people who run the trade feel.
The tanker sailed on and the price went up, and both are true. The gauge to watch is the one the trade keeps for itself: whether ships keep their schedules. If a ship can be hit, put the fire out and still make its next port, the trade is under strain but still running. Nothing here is investment advice.
What to watch
- The Brent January contract, which becomes the front month after Friday's December expiry; it was quoted at $112.19 in early trade1.
- Whether Iran responds to the letter Tehran says it received from US Vice President JD Vance1.
- UKMTO advisories on further incidents near Khasab and the strait's outbound lane2.
The front month tells you how frightened the market is today. The month behind it tells you how long it expects the fright to last.
Sources
- Oil set for fourth monthly gain as Hormuz tanker attack highlights supply risks from war — CNBC (Reuters), 30 Oct 2026, 03:36 CET (updated later on 30 Oct).
- Fire-hit tanker continues journey after being attacked in Strait of Hormuz, UKMTO says — Arab News (Reuters), 30 Oct 2026, 06:46 CET (updated).
Every figure in this piece traces to a source above or to the desk’s own arithmetic on those sources, marked as such. Quotations are short and attributed. Spot an error? Write to the desk; corrections are logged on the method page.
Commentary for information only. Not investment, legal, tax, medical or political advice. Not an offer or solicitation. Analysis may be incomplete or wrong. Charts show published public data, not a trading feed; binding numbers live with the institutions that publish them.