Hurricane Isaias pushed oil prices higher on Friday as energy companies shut in roughly 1.3 million barrels per day of Gulf of Mexico crude production, more than 62% of US offshore output, according to Reuters.
Brent crude settled at $104.72, up 44 cents or 0.42%, and West Texas Intermediate finished at $91.85, up 36 cents or 0.39%. Both benchmarks had traded lower earlier in the session after President Trump said talks with Iran to end the Middle East war had been “productive” and that no attack on Iran was planned before the November 3 midterm elections. He also teased a diesel-related announcement and said he was considering suspending the federal gasoline tax, a move that would require congressional approval to take effect.
The storm shut-in came on top of an already tight market. Brent had briefly touched $105.92 on Thursday, the highest in weeks, as shipping threats in the Strait of Hormuz kept supply risk elevated. The waterway carried roughly 20% of global oil and fuel shipments before the war began, and at least nine vessels were hit in the week through October 5, according to UN data.
Why the hurricane matters so much
Gulf of Mexico output is concentrated in a small number of large platforms and pipeline hubs, so the shut-in of nearly two-thirds of offshore production removes about 1.3 million barrels per day from the market at a stroke. The US Marine Minerals Administration reported the figure on Thursday as operators pulled staff from platforms ahead of the storm.
| Supply factor | Size | Direction |
|---|---|---|
| Hurricane Isaias Gulf shut-in | About 1.3 million bpd offline | Tightens supply |
| Hormuz transit disruption | About 9.5 million bpd exiting, roughly 30% below pre-war | Tightens supply |
| China resuming fuel exports | Resuming after Golden Week halt | Eases prices |
| Trump Iran no-strike pledge | Pre-midterm moratorium | Eases prices |
Storm-related shut-ins usually reprice quickly once platforms return to service, but the market is unusually sensitive right now. Diesel and jet fuel benchmarks are elevated, shipping costs are surging, and the US Energy Information Administration this week raised its fourth-quarter Brent forecast to an average of $105 a barrel, citing constrained Middle East flows and falling inventories.
Ole Hansen of Saxo Bank said the broader market remains unusually tight, pointing to surging shipping costs and exceptionally high diesel and jet-fuel benchmarks as evidence that crude availability is only part of the problem. Refining capacity has itself become a bottleneck, which means even when crude is available, the products that economies actually run on are expensive.
Total Middle Eastern crude flows present a more complex picture than the Hormuz numbers alone suggest. Including pipeline alternatives that bypass the strait, Kpler estimates regional flows at about 16.4 million barrels per day, close to pre-war levels. The system is damaged, not broken, which is why prices have not spiked to the levels some feared earlier in the conflict.
Two competing forces on Friday
Traders weighed two groups of headlines against each other. On the easing side: Trump’s Iran pledge, productive-sounding talks between Washington and Tehran, and China’s plan to resume refined fuel exports after its Golden Week holiday, a Reuters report sourced to officials.
On the tightening side: the US sanctioned more than a dozen tankers and 17 vessels linked to Iran’s so-called shadow fleet for carrying Iranian crude, oil products and petrochemicals, IRGC statements continued to restrict passage through the Strait of Hormuz, and Iran’s foreign minister Abbas Araqchi said Tehran was still reviewing a US proposal that would reopen the strait and expected to respond within days.
Tamas Varga of PVM Oil Associates said the Iran pledge and the China resumption pushed prices down, while the Gulf shut-in pushed them up. The two sets of forces roughly balanced out by the settle. There were also reports of a large fire at Saudi Arabia’s Abqaiq oil facility, though it was unclear whether this was fresh damage or residual smoke from the prior session.
What comes next
The near-term path for oil depends on three things unfolding in sequence. First, how long Isaias keeps Gulf production offline, which affects prompt US supply. Second, Tehran’s answer to the reopening proposal, which is expected within days and could move Brent several dollars in either direction. Third, whether Saudi energy infrastructure comes under direct attack, after Houthi strikes on Riyadh’s King Khalid airport this week killed three Saudis and raised the question of whether the conflict is widening toward export facilities like Yanbu on the Red Sea.
IEA figures show roughly 100 million barrels remain available from its March emergency release programme, and the agency is accelerating stock-draw coordination with member states. That gives a cushion, but it does not remove the structural tightness.
Analysts at Scotiabank argued that the oil spike has been feeding directly into global rates, with the 10-year Treasury yield reaching about 5.34% this week, its highest since 2002, before easing after a well-received 30-year auction cleared with strong indirect demand at 72.3% of bids. The EIA lifted its Brent forecast for both 2026 and 2027, from $91 to $96 and from $74 to $84 respectively on an annual average basis, signaling it sees the higher price environment as persistent rather than temporary.
The reflex is not hard to understand: higher oil feeds inflation expectations, which keep rate expectations tighter, which sustains elevated bond yields, which pressure risk assets including crypto and equities. Until either crude falls meaningfully or inflation data improves, that transmission channel stays open.
The one policy lever that could change the picture in the near term is a credible Iranian acceptance of the US proposal to reopen Hormuz. Several analysts noted that this combination, lower oil and easing geopolitical risk, would allow central banks to be less aggressive about further tightening, which in turn would relieve pressure on yields and support a stronger risk-asset environment.