Crude jumps nearly 4% as Hormuz talks stall, diesel swings

Once peace hopes diminish, the geopolitical premium reappears rapidly, even as Saudi and Iraqi crude flows increase outside the Strait of Hormuz. With Brent above $100, the front month is highly sensitive to any news regarding the blockade or reopening conditions, resulting in elevated two-way risk. Diesel's regulatory-driven fluctuations add a distinct layer of uncertainty to refining margins that crude traders find difficult to hedge. The movement of Treasury yields to 5% tightens financial conditions, potentially curbing demand expectations and restricting how much crude can rally without a genuine supply disruption.

Oil rebounded as diplomatic efforts stalled, reminding traders that the Hormuz premium is never far away with just one failed headline needed. Diesel, meanwhile, was whipped around by conflicting reports about a US export ban.

Summary:

• Brent settled nearly 4% higher near $103, and WTI gained about 2% to around $92, recovering from multi-week lows.
• Iran continues to examine the US response to its peace proposal with many differences unresolved; the Strait of Hormuz and US blockade were topics in indirect talks.
• An Iranian official indicated the strait could reopen within a week if the US eases pressure, while the security chief said it remains closed until Iran's conditions are met.
• Diesel futures fluctuated on contradictory headlines about a possible US export ban before ending slightly lower.
• US crude inventories rose by roughly 3 million barrels versus an expected draw; gasoline and distillate stocks fell.
• Saudi Arabia resumed its East-West Pipeline, and Iraq reported crude exports exceeding 3 million barrels per day.

On Wednesday, oil prices advanced as the absence of concrete progress in US-Iran talks outweighed signs of recovering Gulf supply and a surprising build in US crude stocks. Brent ended nearly 4% higher near $103 per barrel, while WTI rose about 2% to roughly $92, bouncing back after both hit multi-week lows earlier in the week.

Diplomatic efforts remained the central theme. A senior Iranian official told Reuters that Tehran is still reviewing Washington's response to its proposal to end hostilities, adding that many differences persist despite ongoing discussions. The reopening of the Strait of Hormuz and removal of the US naval blockade were addressed in indirect talks on Tuesday. The same official suggested the strait could be operational within a week if the US eases military pressure and lifts its blockade on Iranian ports. In contrast, Iran's security chief Mohsen Rezaei took a harder line, stating that Hormuz would remain closed until Iran's demands are satisfied.

At the UN General Assembly, Iranian President Masoud Pezeshkian declared that Tehran would not yield to the US while still supporting diplomatic efforts. This came one day after President Donald Trump, at the same platform, threatened to annihilate Iran. Some attributed the day's price increase to Pezeshkian's address, but price movements during his speech were modest, and his words did not clearly indicate escalation or de-escalation.

Diesel was the most volatile segment of the complex. Energy Secretary Chris Wright argued that a comprehensive export ban would be ineffective and preferred a voluntary approach, before Politico stated that the administration was planning a 90-day ban. A White House official subsequently denied that report. Diesel futures fluctuated sharply due to the contradictory news, falling at one point before ending slightly lower.

The weekly government data prompted a subdued reaction. US commercial crude inventories rose by around 3 million barrels to about 426 million barrels for the week to September 18, against expectations of a small draw and exceeding a build shown in private data the prior evening. Gasoline stocks fell by around 1.7 million barrels, a larger decline than forecast, while distillate inventories decreased by around 0.4 million barrels. Crude output held steady near 13.9 million barrels per day, and the Strategic Petroleum Reserve declined by about 0.4 million barrels.

Supply-side signals had pressured prices earlier in the week. Saudi Arabia restarted its East-West Pipeline to the Red Sea on Tuesday, per sources briefed on the matter, after drone attacks attributed to Iraqi militia forced a shutdown on September 11 and halted loadings at Yanbu. The kingdom also made additional barrels available to Asian refiners from sources outside Hormuz. Meanwhile, Iraq reported exports exceeding 3 million barrels per day and expects to lift flows through Turkey above 600,000 barrels per day.

The broader backdrop added pressure across markets, with US Treasury yields reaching 5%, a level that weighed on risk sentiment well beyond energy. Elsewhere, Secretary of State Marco Rubio said Ukraine and Russia had both expressed interest in a limited ceasefire covering grain and energy targets. For now, oil remains tied to Hormuz: any credible path to reopening the strait would likely pressure prices lower, while continued deadlock maintains the risk premium.