Acm Research is trading at $79.04, up +4.54%, with a positive company-specific update accompanying the move: its Shanghai subsidiary reported backlog growth. - On September 30, the backlog stood at RMB 17.1 billion ($2.5 billion) as of September 29, up 88.2% year over year. - It includes shipped tools not yet recognized as revenue and orders awaiting shipment, so it is not equivalent to recognized revenue. - Broader technology-market strength may also be supportive. No trading-volume figure was available in the sources reviewed.