Asian markets tumbled as chipmaker stocks experienced a sharp decline, sparking fears the AI rally might have overheated. Concerns also surfaced over Apple's potential chip purchases from China, impacting major players like Samsung and SK Hynix. Meanwhile, comments from Federal Reserve Chairman Kevin Warsh eased inflation worries, suggesting no immediate interest rate hikes. Positive signs emerged from US manufacturing, and geopolitical discussions offered a glimmer of optimism.