Coherent is trading at $296.61, up 5.17%, on September 29, rebounding after Monday’s decline with no clear Coherent-specific catalyst identified. - Monday’s decline came amid broad technology and semiconductor selling pressure tied to OpenAI’s training pause, higher oil prices and Treasury yields. - The supplied sector context also cites AI-demand concerns and geopolitical tensions. Major indexes were only modestly lower in the provided market snapshot, leaving the rebound’s specific trigger unclear.