The US-Iran ceasefire that had underpinned oil markets through late June is over. President Trump said so explicitly, and CENTCOM's actions in the days since back that up CBS News. The benchmark US crude contract rose more than 2.5% as the latest round of strikes hit, with traders repricing Strait of Hormuz risk in real time ANC.

The sequence matters for anyone pricing tail risk in energy or freight. A commercial vessel was attacked on June 26, prompting US strikes on Iran the following day CENTCOM. That came days after CENTCOM forces killed a senior ISIS leader in Syria on June 24 — a separate line of operations that nonetheless kept the region's threat matrix elevated going into the Iran escalation. The US followed with additional strikes on July 1 after what CENTCOM called Iran's "latest actions" CENTCOM, then completed a further round of retaliatory strikes on July 7 CENTCOM. CENTCOM has been documenting this campaign under the name Operation Epic Fury, including a photo release covering its first 24 hours CENTCOM.

For desks that model geopolitical risk premia, the origin story here is worth restating precisely. The initial US strike on Iranian nuclear sites — which Defense Secretary Pete Hegseth and Joint Chiefs Chairman Dan Caine publicly lauded — was a year ago, on June 22, 2025 Defense.gov. It was later characterized by the Pentagon as "historically successful" and 15 years in the making Defense.gov, with roughly 44 American soldiers responsible for defending the base housing CENTCOM's forward headquarters during that operation. Hegseth described Epic Fury's Iran objectives in March 2026 as "laser-focused" precision strikes against key military targets Defense.gov, and by June 10 the department's own threat-tracking page indicated the US was planning major strikes on Iran Defense.gov. What followed in late June and early July, then, sits atop more than a year of escalating engagement rather than a discrete new event.

The July 7 strikes came with a policy lever attached: Washington revoked its prior authorization for Iranian oil sales, effectively reinstating sanctions on Iranian crude exports ahead of that day's action Reuters. That's a meaningful supply-side variable independent of the kinetic escalation — it removes a marginal buyer-friendly carve-out just as shipping risk through Hormuz rises, a combination that explains more of the crude move than the strikes alone. A ship was hit in the Strait of Hormuz around the same period, and Iran's supreme leader said there would be no talks unless Trump halted strikes Reuters. Several people were reported injured in the strikes around that date.

Oil had been comparatively calm into the holiday period — Reuters reported crude "up slightly" ahead of the long US weekend on July 3, with peace efforts still described as holding Reuters. That calm didn't survive contact with the July 7-8 strikes. Reuters reported Iran "flexing its control" over the Strait of Hormuz even as the broader market avoided full dislocation Reuters/Facebook, and separately reported a new wave of US strikes against Iran alongside the license revocation, plus a US strike on a strategic Iranian island amid warnings tied to oil infrastructure Reuters/Facebook. Iran's state broadcaster said on July 8 that eight members of its armed forces had been killed in the US attacks CBS News.

Tehran's diplomatic response has hardened in step with the military escalation. Iran's foreign ministry called the US attacks a "gross violation" of the ceasefire Sky News, and separately said the strikes violated a treaty, warning of "decisive" retaliation France24. Reuters also reported millions marching in Iran and the supreme leader's flat refusal of talks absent a US halt.

For traders, the operative question is less "will there be war" than "how much of the roughly one-fifth of global seaborne oil that transits Hormuz is now genuinely at risk of disruption versus merely repriced for optionality." The 2.5%-plus move in the US benchmark contract reflects headline risk and the sanctions reinstatement more than confirmed physical supply loss — no major shut-in of Gulf production has been reported. Freight, war-risk insurance premia on Gulf-transiting tankers, and the term structure of Brent-WTI spreads are the more granular indicators to watch as this rolls forward, since a genuinely closed or heavily contested Strait would show up there well before it shows up in headline crude prints. Whether the ceasefire's collapse proves durable escalation or another cycle in an intermittent conflict that has run for over a year is, at this point, a matter for forecasting rather than reporting.