CPO concept stocks rally at open; Cambridge Technology hits limit-up

The move is a broad, open-driven bid across the CPO complex rather than an isolated story, with a single limit-up name setting the tone while the larger optical-module and photonics names follow. That pattern suggests sentiment and positioning are doing the work here, since the item carries no company-specific catalyst. For readers tracking the AI-optics supply chain, the signal to weigh is whether the rally holds past the opening auction or fades as liquidity arrives — breadth across so many names at once is the detail worth watching.