Power Integrations is trading at $39.96, down 14.6%, amid a semiconductor-sector selloff. - Chip stocks remained under pressure on November 5 amid concerns tighter data-center regulation could slow AI infrastructure expansion. - The November 4 earnings report forecast Q4 revenue of $118–$126 million; channel inventory rose to 11.8 weeks and consumer demand remained soft. - Adjusted EPS beat, but the cautious outlook may have added company-specific pressure.