Aluminum prices tumbled in London following Iran's announcement that the Strait of Hormuz was open for cargo transit, easing supply chain concerns for the metal. The reopening allows shipments from major producers Bahrain, Saudi Arabia, and the United Arab Emirates to flow freely through this critical waterway. London Metal Exchange aluminum futures dropped sharply on the news.

The Strait of Hormuz is one of the world's most vital shipping lanes, handling roughly 20% of global oil shipments and serving as a key route for aluminum exports from the Gulf region. Bahrain, Saudi Arabia, and the UAE are significant aluminum producers whose exports were potentially disrupted during the recent tensions. The market had been pricing in supply risks from the region, contributing to aluminum's recent price strength.

Traders had been monitoring the situation closely, with aluminum prices having risen in recent weeks amid concerns about potential supply disruptions. The swift reversal following Iran's announcement highlights how sensitive commodity markets remain to geopolitical developments in the Middle East. The move provides relief to aluminum consumers who had been facing higher costs due to supply concerns.