News that the U.S. and Iran had reached an interim deal may have brought some initial relief to markets, but fresh uncertainty emerged on Friday after planned follow-up talks in Switzerland were called off, underscoring the challenges of turning the agreement into a lasting peace settlement. Switzerland's foreign ministry said U.S.-Iran talks scheduled to take place at Bürgenstock on Friday would not proceed as planned. The White House also said that Vice President JD Vance was no longer