Hormuz Reopened. Iran Closed It Again.

GOOD MORNING, The Middle East relief trade barely had time to settle. Oil had fallen sharply as tanker traffic resumed through the Strait of Hormuz, but Iran said Saturday it was closing the waterway again over alleged ceasefire violations. Meanwhile, Wall Street's next AI test is already on the calendar: Micron reports next week, with investors looking for proof that chip demand can keep outrunning increasingly demanding valuations.

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MARKETS | TLDR

• Hormuz becomes uncertain again: Iran's military said Saturday that the Strait of Hormuz would be closed to vessel traffic over alleged U.S. and Israeli violations of the ceasefire, threatening to reverse part of the week's oil relief.
• Oil still ends the week sharply lower: Brent remained on track for a weekly decline of roughly 8% as tanker flows resumed and markets priced a lower probability of prolonged supply disruption.
• AI keeps U.S. equities near the highs: Major U.S. indexes remained near record levels despite a sharp midweek selloff, supported by strong earnings, AI investment and easing Middle East risk.

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OIL

Hormuz Reopened. Iran Closed It Again.

The ceasefire trade took another turn Saturday. A high-level Iranian delegation arrived in Switzerland for talks with the United States, but Iran's military simultaneously declared the Strait of Hormuz closed to vessel traffic, citing alleged violations of the interim agreement. The announcement came only days after the two sides signed a 60-day framework aimed at ending the war and restoring energy flows.

That matters because oil had already priced meaningful relief. Brent was down roughly 8% for the week as Gulf producers prepared to raise exports and tankers began moving through the strait again. Three Indian-flagged vessels carrying more than 860,000 metric tons of oil safely transited on Saturday, evidence that physical flows were recovering even as Tehran threatened another closure.

The market therefore faces two conflicting signals: diplomacy is advancing, but the mechanism that matters most for global energy supply remains politically fragile. If Hormuz stays open, the war premium in crude can keep fading and reduce inflation pressure. If closures become a recurring negotiating tool, the market may have to price a persistent geopolitical premium even without a return to full-scale war.

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AI TRADE

Micron Is the Next Test of the AI Rally

Micron reports earnings on June 24, and the memory maker has become one of the clearest read-throughs on whether the AI infrastructure boom is still accelerating. Investors are watching demand for high-bandwidth memory and other data-center components after AI spending helped keep U.S. equities near record highs despite a volatile week.

The bar is high. Reuters estimates that AI-related capital spending will exceed $700 billion this year, supporting chipmakers and infrastructure suppliers while also pushing valuations higher. Micron sits directly inside that spending stream: memory has become a critical bottleneck for advanced AI systems, making its pricing, customer commitments and capacity plans useful signals for the broader trade.

The risk is that strong demand is already heavily reflected in prices. A good quarter may not be enough if guidance suggests growth is merely holding rather than accelerating. That makes Micron less a test of whether AI demand exists — there is little doubt about that — and more a test of whether fundamentals can continue outrunning expectations.

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HEADLINES

• Iran and the U.S. head into Switzerland talks: Senior Iranian officials and U.S. Vice President JD Vance were headed toward negotiations aimed at turning the interim ceasefire into a more durable agreement.
• Sanctions relief could strengthen Iran's Revolutionary Guards: Reuters reports that the IRGC's extensive interests in oil, construction, shipping, telecom and ports leave it well positioned to capture part of any economic benefit from a future U.S.-Iran deal.
• China keeps fuel exports restricted: May refined-product exports rose from April but remained 69% below a year earlier as Beijing prioritized domestic supply during the Iran war.
• Japan's AI trade posts its best week in nearly two years: The Nikkei gained 7.9% for the week and hit consecutive records as AI-linked stocks rallied, showing how the same infrastructure trade is driving equity markets well beyond the U.S.
• Indian IT gets an Accenture warning: India's IT index fell 3.7% to a three-year low as Accenture's outlook reinforced concerns that corporate clients remain cautious on discretionary technology spending.

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UPCOMING

• U.S.-Iran talks continue June 21: The immediate market question is whether negotiations can keep Hormuz physically open despite Iran's closure announcement and preserve the decline in crude.
• Micron reports June 24: Memory pricing, HBM demand and forward customer commitments will provide one of the week's cleanest reads on the durability of AI infrastructure spending.
• New-home sales arrive June 24: Housing data will show whether elevated mortgage rates are still preventing improving inventory from turning into stronger transactions.
• GDP and PCE arrive June 25: Updated growth and inflation data will test whether the Fed's hawkish turn is supported by an economy that remains resilient and price pressures that remain too high.

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DEEP INSIGTHS

Investors See Micron Earnings as a Pulse Check of the AI Rally

Reuters frames Micron as more than a single-company earnings event. With AI capital spending expected to top $700 billion this year, its results offer a direct look at whether infrastructure demand can continue accelerating fast enough to support elevated semiconductor valuations.

Iranian Guards' Business Empire Could Win Big From Sanctions Relief

This Reuters investigation adds an economic layer to the U.S.-Iran negotiations. Sanctions relief could reopen oil exports and investment, but the structure of Iran's economy means some of those gains may flow to the Revolutionary Guards — complicating the idea that a peace deal produces a straightforward geopolitical normalization.