Oil prices climbed nearly 1% on June 10 after the US conducted fresh military strikes against Iranian targets, reigniting fears that the world’s most important oil chokepoint could face serious disruption.

The Strait of Hormuz, a narrow waterway responsible for roughly 20% of global oil transportation, sits at the center of the anxiety. Reduced shipping flows through the strait have already tightened supply, and each new round of strikes adds another layer of uncertainty to an already fragile energy market.

A conflict that keeps escalating

Tensions have been building since late February 2026, with a series of strikes and missile exchanges that have steadily ratcheted up geopolitical instability across the region.

During earlier flare-ups in 2026, Brent crude spiked more than 5% intraday in some sessions. Those moves were dramatic but short-lived, with prices often settling only about $1 higher by the close.