Why Is AMD Stock Down 4.40% Today Sep 14? AI Hardware Selloff and Slower AI Spending Fears Pressure Shares

AMD sold off as investors repriced AI-linked semiconductors on concerns that frontier-AI development could slow, potentially delaying data-center capex for accelerators and servers. The move was reinforced by a brief rise in U.S. 10-year yields above 5%, tightening valuation headwinds for high-duration growth equities. Near-term focus is on whether semiconductor risk appetite stabilizes and whether rates remain elevated into the Fed decision.