The ⁠Iranian official said positive efforts are underway ​by mediator Pakistan to end the US blockade and to ensure Iran's participation ​in ⁠the peace talks. A ⁠senior Iranian official has said that Tehran is "positively" reviewing its participation in potential peace talks with the United States but ⁠that no final decision has been made. The S&P 500 fell ​0.2pc to 7,114.88, ​while the Nasdaq Composite declined by 0.1pc to 24,434.37. The Dow Jones Industrial Average was little changed at 49,443.86 as escal ...