Power Integrations is trading 4.37% lower at $45.06 after a sharp semiconductor selloff weighed on the group. - Lam Research’s cautious outlook, citing supply constraints and an expected decline in China revenue, intensified concerns across chip stocks; reports described broad pre-market declines in semiconductor and AI-related shares. - No new company-specific announcement explaining the move surfaced. - Power Integrations’ third-quarter results are scheduled for November 4; the sector context points to industry pressure rather than a company-specific catalyst.