Acm Research is trading at $79.64, up 5.07%, as semiconductor-sector strength and renewed optimism around China chip-tool demand support the move. - Shares extended a sharp two-day rally. - Recent bullish sentiment also reflects raised 2026 revenue guidance and more than doubled first-half orders, though valuation concerns remain. - The broader market is lower on September 23, 2026; the advance appears primarily sector-driven, with no fresh company-specific announcement or analyst action clearly explaining today’s gain.