On June 23, Lumentum Holdings Inc. fell 7.56% in regular trading, trading at $823.21/share, with turnover of $557 million. The decline was primarily driven by persistent concerns over delays in co-packaged optics (CPO) mass production timelines.

On the news front, independent research firm SemiAnalysis previously published a report indicating that CPO mass production could be pushed back to 2028 or even 2029, with system-level yield rates at approximately 19% — far below the threshold required for volume manufacturing. This has continued to weigh heavily on optical communications sector sentiment. Although the company's CEO attempted to shift market focus at a recent Mizuho technology conference by highlighting near-packaged optics (NPO) as a potentially larger opportunity with expected mass production in the second half of 2027, the fundamental CPO delay concerns remain unresolved.

The broader Communication Equipment sector exhibited significant weakness, with Applied Optoelectronics down 9.09%, Arista Networks down 7.51%, Nokia down 6.2%, Ciena down 3.13%, and Cisco down 2.58%, amplifying downward pressure through sector-wide correlation effects.

(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.)