Asian stocks rose on U.S. optimism over Iran talks, but fell back after Iran denied negotiations.

Asian stock markets rose Tuesday as U.S. equities gained following President Trump's claim that the U.S. was in talks with Iran to end the conflict, boosting investor confidence in Japan, Australia, and South Korea. Oil prices also climbed due to fears of supply disruptions in the Strait of Hormuz. However, Iran rejected the reports, calling them "fake news," which dampened enthusiasm and left markets cautious despite the initial rally.