On September 28, Coherent fell 3.02% overnight, trading at $286.89 per share, with turnover of $12.87 million. The decline came as the broader optical communication and electronic components sector experienced widespread selling pressure.

On the news front, multiple headwinds converged on the optical communication sector. US senators jointly introduced bill S.5548, proposing to ban federal government procurement of Chinese optical module products for national security systems, reigniting concerns over supply chain disruptions. Meanwhile, fears over North American AI compute infrastructure delivery delays continued to weigh on valuations across the sector, as markets reassessed the pace of cloud vendors' capital expenditure on high-speed optical modules. These concerns compounded profit-taking after the sector's substantial prior rally.

Within the Electronic Components sector, the overall performance was weak. Among individual stocks, Corning fell 2.69%, Vishay Intertechnology fell 2.33%, Amphenol fell 1.27%, Belden fell 0.22%, and Littelfuse was flat. The sector had briefly rebounded earlier in the week following the Akamai-Anthropic $11.6 billion cloud deal, but selling pressure resumed as policy and demand concerns resurfaced.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)