COHH is trading at $5.97, up 4.55%, with Coherent’s rebound the most direct driver. - Coherent rose after demonstrating scalable physical-layer security for AI infrastructure with CUbIQ Technologies. - Renewed optimism about its PhotonLink optics platform also supported sentiment. - A modestly positive broader market and stronger-than-expected GDP may add support, but the evidence points more directly to Coherent-specific AI optics news.