World shares were mixed Friday and U.S. futures declined as optimism over the U.S.-Iran deal to end their war was dimmed by the postponement of high-stakes talks on reopening negotiations over Iran’s nuclear program and getting oil moving through the Strait of Hormuz. Planned talks in Switzerland between Iran and the United States over their efforts to reach a permanent end to war were delayed, while Israel’s military said its forces struck targets throughout southern Lebanon overnight as Hezbollah reported intense fighting in the area. “Both sides are trying to show some good faith,” Bas van Geffen of RaboResearch said in a commentary.