On October 8, Coherent fell 3.2% in pre-market trading, with the optical communications sector showing clear profit-taking pressure. The stock extended weakness after Ciena and Applied Optoelectronics dropped more than 3% the prior day, while Corning, Lumentum, and Coherent each fell more than 2%. Despite Bernstein recently initiating coverage with an Outperform rating and a $350 price target, and despite the company's late-September launch of its PhotonLink integrated optics platform and expanded POLS portfolio to support AI data center demand, short-term sector-wide adjustment pressure remains dominant, keeping the stock under pressure.

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