TSM is trading at 3.34% down now at $284.67 after the US government revoked export waivers for advanced chip technology to China and China imposed new rare earth export restrictions, raising concerns about global semiconductor supply chains. While analysts note that the direct earnings impact from TSMC’s Nanjing plant is limited, the regulatory uncertainty has triggered a negative reaction in the stock. The combination of US policy tightening and Chinese material restrictions is fueling investor caution, despite TSMC’s strong Q3 sales and ongoing demand for AI chips. The broader market is also down, but today’s move in TSM is primarily linked to these regulatory developments.