Brent crude climbed $2.82, or 2.59%, to $111.64 a barrel at 06:26 GMT on Thursday 22 October 2026, close to a five-month high, Reuters reported. US West Texas Intermediate gained $2.24 to $99.39. The trigger was a day of Houthi attacks in Saudi Arabia on Wednesday, including a drone aimed at Saudi Aramco's Shaybah oil field, and the US decision to pull some diplomats' families out of the kingdom.
On the same Wednesday the Wall Street Journal, citing Kpler, reported that Iran's floating oil reserve in Asia has run dry under the US naval blockade. One story is about Saudi barrels at risk; the other is about Iranian barrels already gone. Together they explain why the market keeps paying up for every new headline.
What happened at Shaybah
Early on Wednesday 21 October Saudi air defences intercepted a drone aimed at a processing facility at Shaybah, in the Empty Quarter near the UAE border. Debris hit a contractor's vehicle outside the facility's perimeter and started a fire. Two people were killed, a Filipino and a Nepali national, and two were injured, Bloomberg reported. The energy ministry said operations were unaffected.
Shaybah produces about 1 million barrels of crude a day, according to Bloomberg and The National. It is not the first time the field has been targeted: the Houthis hit its gas liquids plant in August 2019, without lasting damage to output.
Nobody had claimed the Wednesday strike when Bloomberg reported it, though the Saudi-led coalition said it had intercepted a drone fired towards the Eastern Province. Hours later an attack on King Fahd International Airport in Dammam killed one person and injured eight, according to Saudi Arabia's civil aviation authority. Reuters attributes both strikes to the Iran-aligned Houthis.
The pattern matters more than one drone. A week earlier Aramco's Dhahran headquarters was hit, and an attack on Riyadh's main airport earlier in October was the deadliest in the kingdom in more than a decade. The National reports that flows on the East-West pipeline, the 7 million barrel a day route that bypasses the Strait of Hormuz, were halted on 5 October after a strike on a pumping station east of Riyadh. Washington has ordered non-emergency government staff and their families to leave Saudi Arabia.
The prices, settle by settle
The futures market had already priced much of this before Thursday. Settlements on the ICE and NYMEX, from Reuters and Yahoo Finance data:
| Session | Brent, $ | WTI front month, $ |
|---|---|---|
| Fri 16 Oct | 109.86 | 101.41 |
| Mon 19 Oct | 109.55 | 103.66 |
| Tue 20 Oct | 108.79 | 101.79 (November, expired) |
| Wed 21 Oct | 108.82 | 97.15 (December) |
| Thu 22 Oct, 06:26 GMT | 111.64 | 99.39 |
Tuesday was the warning shot: Brent touched about $112 intraday and WTI's expiring November contract spiked to $110.48 before both fell back on mediation hopes. On Wednesday, the day of the Shaybah strike, Brent settled just 3 cents higher, because the ministry's "operations unaffected" line arrived alongside the attack. WTI eased 67 cents. Part of WTI's drop on the screen is the switch from the November to the December contract, not a fall in the market.
US data pulled the other way. The Energy Information Administration said on Wednesday that crude stocks fell 3.06 million barrels to 412.5 million, against the 820,000-barrel draw expected in a Reuters poll. Distillates, which include diesel and heating oil, rose 1.68 million barrels to 104.3 million, against an expected 1.16 million barrel drop. The Department of Energy also offered to loan up to nearly a third of the 1-million-barrel emergency heating oil reserve.
Iran's shadow fleet has run out of oil
For most of the war Iran had a cushion: tankers holding millions of barrels of crude in Asian waters, sold steadily to Chinese refiners. By mid-October that floating storage was fully depleted, according to Kpler analysts quoted by the Wall Street Journal on 21 October. "There's no more oil to discharge to China anymore," said Homayoun Falakshahi, Kpler's head of crude oil analysis.
The cause is the US naval blockade of Iranian ports. Bloomberg reported on 1 October that Iran loaded no oil onto tankers in September. US Central Command says the blockade has denied Tehran at least $25 billion of oil revenue. On 8 October the Treasury sanctioned 17 more vessels linked to the shadow fleet under what it calls Operation Economic Outcast, CNBC reported. President Masoud Pezeshkian said this week that the US "could not expect dialogue while blockading and threatening Iran".
For the oil market, the important point is that the Iranian barrels have now left the system for good. While floating storage lasted, China's independent refiners could keep buying discounted Iranian crude even with no new loadings. Now they must compete for other barrels, from the Gulf producers whose own exports are under attack.
Hormuz is still contested
Kpler counts at least 18 attacks on shipping in the past two weeks, Reuters reported, and LSEG analysts warn that Iran is targeting tankers well beyond the Strait of Hormuz, in the Gulf of Oman, threatening Gulf loadings and ship-to-ship transfers. On Thursday the Revolutionary Guards' navy said four vessels "involved in illegal oil transfers" in the northern Gulf were hit and caught fire, and that three more struck mines west of the strait.
"Oil prices remain well bid, with ICE Brent back above $110 per barrel this morning following additional deadly attacks on Saudi Arabia," ING analysts wrote on Thursday.
Diesel, petrol and the Fed
Diesel is where the shortage shows. NYMEX ultra-low sulphur diesel futures settled at $4.925 a gallon on 20 October, about $207 a barrel, roughly $98 above Brent by my calculation. AAA's national average for diesel was $6.309 a gallon on 22 October, against $3.629 a year ago. Regular petrol was $4.270, down from $4.475 a month ago but up from $3.066 a year ago.
The Federal Reserve meets on 27–28 October with its target range at 3.75–4.00%. September CPI was already 3.7%, with gasoline up 9.1% in the month, as our Fed outlook after the hot CPI showed. Brent above $110 a week before the decision makes a hold harder to describe as comfortable.
Stocks: energy up, tankers not
The Energy Select Sector SPDR fund (XLE) closed at $68.16 on Wednesday 21 October, up 3.3% from its 12 October close of $66.01, and Exxon Mobil closed at $178.09, up 3.5% over the same span. Frontline closed at $51.29, down 13.3% from $59.19 on 12 October despite the attacks. As I argued in the tanker risk premium piece, tanker equities trade on day rates and on the odds of de-escalation, and they tend to move first.
Scenarios
| Scenario | What would trigger it | Reference point |
|---|---|---|
| De-escalation | Iran-US mediation progress; Ukraine peace talks resume next month | After the June memorandum Brent fell to $71.99 by 26 June |
| Grinding status quo | Drones intercepted, Saudi output intact, blockade holds | Brent settled between $105.69 and $109.86 from 12 to 21 October |
| Supply hit | Damage at Shaybah, Abqaiq or loading terminals; mines in Gulf lanes | Brent's 2026 peak was $118.35 on 31 March |
In analyst Ruslan Averin's view, the market is still pricing the middle row. Wednesday showed how much a single "operations unaffected" statement is worth: a 3-cent settle on the day of a deadly strike. I would watch three things: whether any attack actually takes Saudi barrels offline, Kpler's count of Iranian loadings now that floating storage is gone, and diesel. A distillate premium near $98 a barrel is the part of this shock that reaches consumers and the Fed fastest.
Related: the Saudi East-West pipeline shutdown, oil's slide on US-Iran talks in September and the Nasdaq's worst week with Brent near $110.