Oil jumps and markets wobble after US seizes ship, dimming hopes for Iran peace deal

Markets stumbled and oil prices spiked on Monday after the United States seized a vessel believed to be carrying Iranian weapons, an action that has rattled investors and dimmed hopes for a lasting peace deal in the Middle East. The move, confirmed by US officials, has triggered sharp reactions in energy and financial markets, with Brent crude climbing over 5% and European stock indexes sliding.

The seizure, which took place in the Arabian Sea, has raised alarms about the security of the Strait of Hormuz, a critical chokepoint for global oil shipments. Even the possibility of a prolonged closure sent shivers through trading floors. The FTSE 100 dropped more than 1%, and UK natural gas prices climbed as utilities braced for potential supply disruptions. Analysts say the market reaction reflects not just the immediate risk, but the fragility of recent diplomatic gains.

Iran's state media responded swiftly, calling the seizure a breach of existing understandings and announcing it has no intention of entering new negotiations. That hardline stance deepened concerns that the window for diplomacy may be closing. The Biden administration has defended the action as lawful and necessary for regional security, but critics argue it could unravel months of quiet backchannel efforts to stabilize relations.

While oil producers are seeing short-term gains-energy stocks rose across Europe and the US-broader markets absorbed the shock less smoothly. Technology and consumer sectors took the brunt of the sell-off, as investors rotated into safer assets. The S&P 500 erased part of its recent rally, though the pullback was more measured than in past flare-ups, suggesting some resilience built up over the last year.

Still, the incident underscores how vulnerable global markets remain to geopolitical surprises. The Strait of Hormuz handles about a fifth of the world's oil, and even temporary disruptions can ripple through supply chains and inflation forecasts. Traders are now closely watching for any signs of retaliation or further military activity in the region.

For now, officials on both sides are keeping channels open, but the tone has shifted. Diplomats say the next 48 hours will be critical in determining whether this incident becomes a brief setback or a turning point. With oil hovering near $90 a barrel and volatility creeping back into equities, the stakes for global economies are rising fast.

Markets will likely stay on edge until there's clearer evidence of de-escalation. Until then, every headline from the Gulf could send another jolt through trading desks from London to New York.