Ceasefire Collapse: Seven Nights of Strikes Push Hormuz to a Standstill and Brent Past $88

The interim ceasefire between the United States and Iran is no longer fraying — it is broken. On Saturday, July 18, Iran’s Deputy Foreign Minister Kazem Gharibabadi announced Tehran had suspended all commitments under the Islamabad Memorandum of Understanding, the deal signed roughly a month ago that was meant to end the war and reopen the Strait of Hormuz.{{cite:0dadbcdb1284}} Supreme Leader Ayatollah Mojtaba Khamenei, still unseen since the conflict began, warned that Iran and its “Axis of Resistance” proxies have “unforgettable lessons in store” for the United States, calling President Trump’s signature on the deal “utterly worthless and devoid of credibility.”{{cite:0dadbcdb1284}}

The market signal is straightforward but under-priced in equities: until Hormuz is reliably open, oil stays bid, and the risk of a second chokepoint — the Bab al-Mandeb Strait at the mouth of the Red Sea — is rising.

Seven straight nights of strikes

US Central Command announced it had completed its seventh consecutive night of strikes against Iran, hitting “surveillance sites, military logistics infrastructure, underground weapons storage, and maritime capabilities.”{{cite:c38fdf751c76}} The strikes have escalated in scope: what began as targeted hits on coastal radar and drone sites has expanded to bridges, tunnels, and power infrastructure across southern Iran, including a desalination plant in Hormozgan province that cut water to roughly 10,000 people.{{cite:c38fdf751c76}} Overnight strikes damaged two tunnels and a bridge on the main highway toward Bandar Abbas, Iran’s principal port at the narrowest point of the strait.{{cite:c38fdf751c76}}

The US has also reimposed a naval blockade on Iranian ports, redirecting five commercial vessels and disabling one in the first three days of enforcement.{{cite:0dadbcdb1284}}

Iran has retaliated across a widening arc. On Friday, an Iranian drone and missile attack on a US base in Jordan killed two American service members and left one missing — the first US combat deaths from direct Iranian fire since the opening days of the war.{{cite:c38fdf751c76}} Sixteen US service members have been killed and over 430 wounded since the conflict began with US-Israeli strikes on February 28.{{cite:c38fdf751c76}} Iran has also struck Kuwait, Bahrain, Jordan, and Iraq, with Iran’s Revolutionary Guard Corps claiming it halted four vessels attempting to transit Hormuz under US protection using a “coordinated missile and drone operation.”{{cite:5f1fdfaaa746}}

How the ceasefire unraveled

The collapse followed a predictable escalation chain. Roughly a week after the deal was signed, an Iranian drone struck a cargo ship using an alternative US-military-overseen route through Hormuz on June 25.{{cite:42ecb7c233bf}} The US responded with strikes. Iran retaliated against a tanker. The US struck again — this time hitting over 60 small Revolutionary Guard boats.{{cite:42ecb7c233bf}} Iran then broadened its targets to Gulf states hosting US forces: Kuwait, Bahrain, and mediator Qatar.

The core dispute is control of the strait. The interim deal contained ambiguous language suggesting Iran would manage traffic and potentially charge fees.{{cite:42ecb7c233bf}} Iran has seized on that, declaring the waterway an “unbreakable red line” and insisting vessels must pay transit fees to Tehran.{{cite:42ecb7c233bf}} The US and its partners maintain the strait must remain open and toll-free, as it was before the war. The gap between these positions has not narrowed — it has hardened.

The US also revoked a waiver that had allowed Iran to sell oil internationally for US dollars for the first time in years, a provision of the interim deal that is now void.{{cite:42ecb7c233bf}}

Hormuz traffic near a standstill

The shipping data is the sharpest market tell. Only three commodity vessels crossed the Strait of Hormuz on Thursday, according to an international shipping tracker, as Iranian attacks, the renewed US blockade, and threats to halt oil and gas exports forced tankers to stop, turn back, or avoid the strait entirely.{{cite:5f1fdfaaa746}} Reuters reported that some shipping companies are refusing US-military-guided transits through the strait after recent attacks.{{cite:5f1fdfaaa746}} The IRGC has declared the waterway “completely closed” and reported that two oil tankers caught fire after attempting to pass through a mined route south of the strait.{{cite:5f1fdfaaa746}}

Before the war, Hormuz carried roughly a fifth of the world’s traded crude oil.{{cite:c38fdf751c76}} Iran effectively shut it down after the February 28 strikes, giving Tehran significant leverage. The US Department of Energy told CNBC that 8.5 million barrels of oil transited Hormuz on one Sunday in mid-July under US military escort, with regional flows averaging 15 million barrels per day — but those numbers are from before the latest escalation cycle.{{cite:146aa9cf11e6}} The current traffic level appears far lower.

Iran has also signaled it could alert its Houthi allies in Yemen to close the Bab al-Mandeb Strait at the mouth of the Red Sea, which would open a second front in the global shipping disruption.{{cite:146aa9cf11e6}}

Oil reprices the closure; equities lag

Brent crude futures with September delivery surged 4.6% on Friday to settle at $88.10 a barrel, while US West Texas Intermediate gained 4.5% to $82.49 — both at their highest levels since mid-June.{{cite:0dadbcdb1284}} For the week, both benchmarks gained approximately 16%, with Brent on track for a third consecutive weekly gain.{{cite:0dadbcdb1284}}

The equity reaction has been more muted, and that divergence is the anomaly worth watching. The S&P 500 fell 1% on Friday, capping its first losing week in three, but the decline was driven primarily by a semiconductor selloff and AI-spending concerns rather than by the Middle East escalation.{{cite:dff5546a90b2}} Markets worldwide tumbled as chip stocks plunged for a third consecutive day.{{cite:dff5546a90b2}} Oil prices and geopolitical risk were secondary factors in the equity narrative — at least for now.

The energy sector, by contrast, has surged 20% in 2026 amid the US-Israel-Iran tensions, making it one of the year’s strongest performers.{{cite:fa9d23f98bf4}} That divergence — energy pricing a sustained supply disruption while broad equities treat the conflict as a background risk — is the gap that closes violently if Hormuz remains shuttered for another week.

The widening conflict map

The pattern that should concern markets is geographic spread. Iran’s retaliatory strikes are no longer confined to the strait or even to US military assets. In the past 48 hours:

• Kuwait: A water desalination plant and an oil facility were hit — the second attack on Kuwait’s water infrastructure in two days. Kuwait depends on desalination for 90% of its drinking water.{{cite:c38fdf751c76}}
• Bahrain: Air raid sirens sounded multiple times; air defenses intercepted Iranian projectiles.{{cite:c38fdf751c76}}
• Jordan: Air defense systems downed Iranian missiles; a US base was attacked, killing two Americans.{{cite:c38fdf751c76}}
• Iraq: Attack drones were shot down over Irbil.{{cite:c38fdf751c76}}
• Kuwait airspace was briefly closed; Kuwait Airways rescheduled most flights.{{cite:0dadbcdb1284}}

Iran has warned regional populations to “stay away from US bases,” a signal that further strikes on Gulf infrastructure are likely.{{cite:f69a85c4cf56}} The Gulf Cooperation Council’s secretary general accused Iran of war crimes for targeting civilian facilities.{{cite:c38fdf751c76}}

A separate tariff front

The Hormuz crisis is unfolding alongside a parallel trade-policy escalation. On July 16, the US announced 25% tariffs on Brazilian imports under Section 301, effective July 22, covering roughly 3,000 products with some 2,000 exempted.{{cite:432e6df26748}} Brazilian officials said the tariffs hit approximately $11 billion in exports.{{cite:432e6df26748}} Separately, a bipartisan group of US senators proposed tariffs of up to 100% on exports from countries continuing to buy Russian oil, including India.{{cite:432e6df26748}} And President Trump threatened Canada with tariffs over wildfire smoke affecting US air quality.{{cite:432e6df26748}}

The combined effect is a global trade environment tightening on multiple fronts simultaneously — energy supply disrupted by conflict, tariffs widening on trading partners, and sanctions legislation targeting third-country oil buyers.

What to watch next

1. Hormuz transit data. If daily vessel counts remain in the single digits for a second week, oil’s $88 level is a floor, not a ceiling. Watch for shipping insurance war-risk premiums to spike further.

2. Bab al-Mandeb signal. Any Houthi announcement or attack on Red Sea shipping would open a second chokepoint and force a re-rating of global freight costs. Iran has explicitly raised this possibility.{{cite:146aa9cf11e6}}

3. US ground operations. US strikes have cut roads and bridges to Bandar Abbas, and Trump has mused about seizing Iranian-held islands in the strait — an operation that would require tens of thousands of ground troops.{{cite:42ecb7c233bf}} Any shift from airstrike-only to amphibious or ground planning would mark a regime change in the conflict’s scope.

4. Equity-energy divergence. If oil continues higher while the S&P 500 remains range-bound, the gap is a coiled spring. Energy stocks have already gained 20% YTD;{{cite:fa9d23f98bf4}} a sustained Hormuz closure would pressure margins for transport, chemicals, and airlines — sectors not yet pricing the risk.

5. Mediation channels. Qatar and Oman have been the principal mediators. There was no word on new mediation efforts as of Saturday.{{cite:c38fdf751c76}} The absence of a credible backchannel is itself an escalation indicator.

The base case is that this settles into a painful new equilibrium: Hormuz partially closed, oil elevated, and both sides exchanging strikes without a clear off-ramp. The risk case is that the geographic spread — Iran hitting four Gulf states in 48 hours — precedes a phase change, not a plateau. The quiet indicator to track is not the headline of each night’s strikes but whether transit volumes through Hormuz are recovering or still falling. That number, more than any diplomatic statement, will tell markets whether the chokepoint is temporary or structural.