President Donald Trump ordered a naval blockade of the Strait of Hormuz on Friday, snapping a brief lull in U.S.–Iran tensions after peace talks collapsed. The move sent a shock through commodity markets, lifting oil prices sharply as traders priced in potential disruptions to the world’s most vital shipping lane. Analysts fear a prolonged shutdown could lift Brent toward $100 a barrel.

U.S. equity futures opened lower, with Dow‑Jones index futures slipping amid the same risk‑off sentiment that drove the dollar higher. Investors cited the blockade as a fresh geopolitical trigger that could tighten global supply and weigh on energy‑intensive sectors, prompting a brief flight to safety across major asset classes. Energy stocks, especially oil majors, rallied as the market priced the supply shock.

The abrupt escalation underscores how quickly diplomatic setbacks can reverberate through financial markets, reminding traders that any interruption in Hormuz traffic instantly reshapes oil supply calculations. With the blockade now official, oil-related equities and airlines face heightened cost pressures, while the broader market watches for any sign of de‑escalation that could restore calm. Travel firms are already revising itineraries to avoid higher fuel costs.