Negotiations between the United States and Iran in Switzerland have effectively stalled following aggressive rhetoric from President Donald Trump, who threatened Tehran while Vice President JD Vance met with Iranian delegates in Lucerne.

The breakdown in talks leaves the nuclear dispute unresolved and keeps the Strait of Hormuz under significant geopolitical pressure, a critical chokepoint for global energy flows.

Markets are responding to the persistent uncertainty by maintaining elevated risk premiums on crude oil and shipping assets.

Brent crude prices remain supported by the threat of renewed disruption in the Persian Gulf, while tanker equities and freight rates reflect the ongoing vulnerability of key trade routes.

The lack of a diplomatic breakthrough means that insurance costs and routing adjustments for vessels transiting the region are likely to remain elevated.

This development extends a four-month stalemate in US-Iran peace talks, with President Trump previously stating he is "in no hurry" to finalize a deal.