On July 1, Lumentum Holdings fell 5.26% in regular trading, trading at $820.89/share, with turnover of $291 million. The decline came amid a broad selloff across the U.S. optical communications sector, with Corning falling over 4%, Marvell Technology dropping nearly 3%, and Coherent declining more than 2%, as sector-wide linkage effects intensified pressure on individual stocks.

Fundamentally, an independent research institution previously published a report indicating that co-packaged optics (CPO) technology mass production timelines may be pushed back to 2028 or even 2029, with system-level yields at only approximately 19% — far below production-ready standards. This structural concern continues to weigh heavily on sentiment across the optical communications space, prompting markets to reassess expectations for AI-driven optical interconnect demand.

Within the Communication Equipment sector, the broader group traded lower. Among individual stocks, Cisco fell 0.91%, Arista Networks fell 3.71%, Nokia fell 2.75%, Ciena fell 4.77%, and Applied Optoelectronics fell 4.04%.

(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.)