Brent crude futures climbed back above $90 a barrel, while West Texas Intermediate topped $86 after the US and Iran exchanged strikes for the first time in about a month. Tehran also claimed that an unidentified supertanker was struck by naval mines in the Strait of Hormuz.

Meanwhile, diesel crack spreads are approaching $100 a barrel again, suggesting an increasingly severe shortage across refined-product markets as the summer draws to a close. 

US Central Command said American forces struck Iranian rocket launchers that were preparing to deploy anti-ship mines in the critical waterway. The US has touted the Oman shipping corridor as open for business and moving crude and other energy products. Tehran's inability to halt tankers passing through that part of the strait may suggest that its offensive capabilities have been degraded.

Iran's Islamic Revolutionary Guard Corps said it retaliated by targeting US air bases in Jordan, while the United Arab Emirates intercepted an Iranian drone over its territorial waters.

Trump on Monday morning issued a Truth Social declaring Iran a "failed nation":

The US military (CENTCOM) has said it did not target Kharg Island in the overnight strikes. According to a summation of there things stand:

The latest U.S.-Iran escalation appears increasingly centered on control of the Strait of Hormuz. Iran has been using small boats to monitor and identify commercial vessels transiting the Strait using Omani waters for an undetermined period. The boats can blend into civilian maritime traffic, making them difficult to distinguish from ordinary vessels. This comes amid sporadic Iranian attacks and attempts to restrict ships transiting Hormuz without Iranian permission.

The U.S. then struck Iranian missile launchers on Larak Island after assessing they were preparing to deploy sea mines into the Strait. Iran responded with missile attacks targeting U.S. bases in Jordan, with eight missiles reportedly intercepted. Al Udeid Air Base in Qatar was also reportedly targeted, though that remains unconfirmed.

The pattern suggests Iran is attempting to reassert control or disrupt maritime traffic through Hormuz, while the U.S. is acting to prevent Iran from closing or mining the waterway. Various reports indicate transits through the strait of Hormuz have declined. What remains to be seen is whether the strikes from both sides tonight will continue in the coming days.

"Brent crude is firmer at $90.48/bbl, up 2.5%, as tensions around the Strait of Hormuz support the geopolitical risk premium," UBS analyst Dharmesh Gangaram wrote in a note.

Gangaram continued, "Overall, the desk sees a cautious, risk-off start to the session. Geopolitical developments and lower European liquidity are likely to remain the key drivers, with particular attention on the resources complex amid broad-based weakness in precious metals."

Despite the overnight tit-for-tat attacks, an estimated 6 million to 8 million barrels per day of crude, primarily from US-allied Gulf producers, continues to move through Hormuz.

We previewed this in a note last week titled:

"The key is to watch the barrels, and as long as they continue to flow through the Strait of Hormuz, the buying appetite in the market remains muted for fear of being caught out," Ole Hansen, head of commodity strategy at Saxo Bank, wrote in a note.

Last week, the top US commander for the Middle East said American forces had cleared Iranian mines from the Hormuz waterway, declaring the shipping lanes open.

With its missile batteries, drone launchers, naval units, surveillance networks, or command infrastructure degraded, Iran appears to be shifting from conventional sea denial toward a lower-cost asymmetric strategy.

Weekend Developments

•  US attacked two missile launchers of the IRGC on Larak Island on Sunday, which were said to be on standby to launch missiles with sea mines toward the Strait of Hormuz, while there were later reports of explosions heard near Larak Island.
• US Central Command said IRGC claims of US aggression in the Strait of Hormuz are false, but added the US conducted limited precise action against IRGC minelaying forces that posed an imminent threat in the Strait of Hormuz.
• Iran’s Revolutionary Guards warned the US strike on Larak Island would be met with a response and punishment, while it said several soldiers and civilians were killed and wounded in the assault.
• Iran's Revolutionary Guards later announced that they retaliated with missiles and drones against two US bases in Jordan and warned that any attack against them will be met with a more devastating response, although a US official cited by Fox News stated no major damage in Iranian attacks on US forces in Jordan and that all missiles were intercepted.
• Iran's Press TV noted reports of Iran firing missiles towards US vessels in the Strait of Hormuz, and there were reports of explosions heard in the UAE and in Qatar, while Iran's army later said it launched tens of drones at the Al Minhad air base in the UAE.
• IRGC said a supertanker caught fire and was halted after being struck by two naval mines in the Strait of Hormuz, while it added that the tanker was attempting to pass illegally through the Strait of Hormuz and that ships must comply with its rules for passage. IRGC separately announced that it shot down a US MQ-9 drone over the Strait of Hormuz.
• Iran's Foreign Ministry said it will respond decisively to any further enemy military aggression, and stated that the US and parties supporting its military actions bear full responsibility for consequences of escalation.
• US President Trump reiterated in a pre-recorded Fox News interview that Iran cannot have a nuclear weapon and said the Iran blockade has been unbelievable, while he also commented that the US had to intervene in the Middle East to prevent Iran from using a nuclear weapon against Israel and other countries in the region and possibly against the US.
• US President Trump posted a generated video with the caption "Kharg Island being blown to smithereens!!!"
• US Treasury Secretary Bessent said the US Treasury plans to impose more Iran secondary sanctions every week, starting with banks. He also stated that they are telling banks it's not okay to have Iranian money and to aid the Iranian regime, and they will probably just sanction a bank outright next time, after the US imposed curbs on an Egyptian bank's United Arab Emirates branches.
• Iranian President Pezeshkian said they are not looking for war, but will give a decisive response to the aggressors, while he added that instability and unrest in the region are not in the interest of any countries and will create challenges for everyone.
• Iran's President said on Friday that Iran is ready for cooperation and understanding with regional countries, including Saudi Arabia and the UAE, while it is to open its route if four commitments are met. He also stated that Iran is to increase gasoline prices, and that exports and imports have decreased by up to 35% because of US sanctions and the blockade.

Overnight Developments

• US officials said they are monitoring the Strait of Hormuz and will strike any forces that threaten navigation in the waterway, Al Arabiya reported.
• Iran's IRGC Navy said compliance with regulations issued for the Strait of Hormuz is mandatory and warned against being “misled” by the US, Press TV reported.
• Yemeni armed forces reportedly targeted Saudi ships in the Red Sea, ISNA reported citing Yemeni media reports.
• UAE Ministry of Defense denied reports that Al Minhad Air Base was targeted by missiles, calling the claims unfounded and saying it remains on high alert and fully prepared to respond to any threats.
• Iranian oil operations are continuing on Kharg Island, and the oil sector there has not stopped, Al Hadath reported.