Equity markets across the Gulf region closed lower on Tuesday, with Dubai's main share index declining 1.3% as investors reacted to a sharp escalation in geopolitical tensions.

The sell-off followed Washington's decision to reinstate its naval blockade against Iran, a move that has intensified hostilities between the two nations and raised immediate concerns about regional stability.

The market retreat marks a continuation of the downward pressure that has weighed on Gulf equities throughout the week.

Earlier in the week, regional bourses had already retreated as reports emerged that Iran had sealed key shipping routes, casting a shadow over trade flows and energy logistics.

The reinstatement of the US naval blockade has compounded these fears, prompting investors to reassess risk exposure in the region.

The Strait of Hormuz remains the critical chokepoint in this scenario.