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U.S. Stocks Surge as Iran Reopens Strait of Hormuz, Oil Prices Plunge

U.S. Stocks Surge as Iran Reopens Strait of Hormuz, Oil Prices Plunge
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U.S. stocks surged Friday as the Dow Jones Industrial Average leapt more than 1,000 points and the S&P 500 pushed above 7,100 after Iran declared the Strait of Hormuz “completely open” to commercial traffic during a ceasefire, sending oil prices tumbling more than 10%.denver7 +1 The rally drove Wall Street toward fresh record highs even as a U.S. naval blockade on Iranian shipping formally remained in place.politico +1

The move followed a 10‑day truce between Israel and Hezbollah in Lebanon, during which Iran said all commercial vessels could transit the world’s most important oil chokepoint along “a coordinated route” overseen by its maritime authorities.politico +1 The Strait of Hormuz carries about 20% of global oil shipments, and its weeks‑long disruption in the Iran war had driven crude above $100 and stoked fears of a prolonged inflation shock.npr +1

How a Reopened Hormuz Ignited a Global ‘Risk‑On’ Rally

Iran’s foreign minister Abbas Araghchi announced on X that “the passage for all commercial vessels through Strait of Hormuz is declared completely open” for the duration of the ceasefire, triggering an immediate sell‑off in crude futures and a powerful rotation into stocks tied to cheaper energy and borrowing costs.politico +1 West Texas Intermediate crude fell roughly 10–13% to around $79 a barrel, while Brent dropped into the mid‑$80s.denver7 +1

Airlines and travel names led the charge: United Airlines jumped about 11%, and major cruise operators Norwegian Cruise Line and Royal Caribbean each soared around 10%.denver7 Homebuilders also surged, with Builders FirstSource up nearly 10% and Lennar gaining more than 7%, as falling bond yields bolstered hopes for lower mortgage rates.denver7 The 10‑year U.S. Treasury yield slipped about 10 basis points to near 4.22%, improving equity valuations and feeding a broad “risk‑on” mood across global markets.denver7 +1

Fragile Ceasefire, Fed Calculus and the Limits of Relief

Despite the market euphoria, the underlying geopolitical deal remained tentative. President Donald Trump publicly thanked Iran and Pakistan for brokering safe passage but insisted the U.S. naval blockade on Iranian ships and ports would stay in force until a broader agreement was “100% complete.”apnews +1 Shipping and insurance executives warned traffic would only gradually normalize as owners waited to see vessels transit safely through a waterway still littered with war risks.politico

For central bankers, the sudden oil slump altered the inflation outlook. Lower fuel prices, if sustained, could ease pressure on household budgets and give the Federal Reserve more room to consider rate cuts later in 2026, analysts said.npr “This will be much better for inflation than it will be for growth, though it will be good for both,” said Neil Dutta of Renaissance Macro Research, arguing that an oil‑driven inflation scare had been the main obstacle to easier policy.npr San Francisco Fed president Mary Daly cautioned that policymakers still needed to see whether the ceasefire holds before drawing firm conclusions.npr

The Bigger Picture

The relief rally underscored how tightly global markets were tethered to a narrow waterway where a few weeks of conflict had rattled energy supplies, stoked inflation fears and forced traders to reprice the Fed’s path. With Hormuz partially normalized but the U.S. blockade and regional tensions unresolved, investors are now betting that cheaper oil and lower yields can extend the bull market—so long as a fragile ceasefire in the Middle East survives its first real tests.