Silicon Motion Technology is trading at $166.77, down 8.06% at 9:48 a.m. EST on November 5, 2026, as semiconductor shares face pressure amid investor concerns that tighter data-center regulations after the U.S. midterm elections could slow AI infrastructure construction and chip demand. - Reuters reported chip and data-center-related shares remained under pressure on November 5. - Silicon Motion reported strong third-quarter sales on October 29; no new company-specific negative catalyst was found for November 5.