US Optical Communications Stocks Fall Premarket; Coherent Down Over 3%

The synchronized move across optical component and connectivity names suggests a sector-level repricing rather than a company-specific story, since no single firm's disclosure is cited. That matters for anyone tracking the AI datacenter buildout trade, where these suppliers sit in the same demand chain and have often traded as a bloc. The open question is whether this is a temporary premarket reaction or the start of a broader de-rating, and whether the weakness holds once regular trading begins.