Iran has agreed to invite International Atomic Energy Agency (IAEA) inspectors back into the country, a move that signals a potential turning point in the ongoing Middle East conflict.
Vance announced the development on Monday, describing it as the first step toward permanently ending Iran's nuclear weapons programme.
The agreement follows a first round of direct talks between Washington and Tehran aimed at halting hostilities in the region.
The prospect of renewed diplomatic engagement and verified nuclear compliance is likely to weigh on risk premiums embedded in global energy and shipping markets.
Investors have priced in significant geopolitical uncertainty since the escalation of tensions, with Brent crude and freight rates reflecting the threat of supply disruptions.
A credible path to de-escalation could see these premiums unwind, offering relief to cost-sensitive industries and consumers alike.