On July 1, Lumentum Holdings declined 3.25% in pre-market trading, trading at approximately 831.96 USD/share, with turnover of approximately 12.44 million USD.

The decline came amid a broad pre-market selloff across U.S. optical communication stocks. Corning fell over 4%, Marvell Technology dropped nearly 3%, and Coherent declined over 2%, with sector-wide linkage effects intensifying selling pressure on individual names. The retreat was further compounded by persistent concerns over Co-Packaged Optics technology timelines, as an independent research firm previously reported that CPO mass production could be delayed to 2028 or even 2029, with system-level yields at only approximately 19% — far below commercial production thresholds.

Market participants are reassessing expectations for AI optical communication plays, with capital increasingly focused on customer lock-in relationships, order visibility, and actual CPO deployment timelines rather than broad thematic exposure.

(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.)