Washington/Tehran, April 17 -- US President Donald Trump claimed Friday that Iran has agreed to keep the Strait of Hormuz open permanently, terming it a major step toward stabilising global energy flows, as the Iran-US ceasefire nears its expiration.

"Iran has agreed to never close the Strait of Hormuz again. It will no longer be used as a weapon against the World!" Trump wrote on Truth Social, nine days into the two-week truce.

The narrow waterway is one of the most critical arteries in global energy trade, with roughly 20% of the world's crude oil passing through it.

When the war began on February 28, Iran responded by targeting ships and ports, effectively choking off all traffic along the route, hurling energy markets into all out ch...