On July 29, Lumentum fell 3.52% in after-hours trading, trading at approximately $627.9/share, with turnover of $30.17 million. The decline extends the previous session's steep selloff, during which the stock plunged over 8% alongside peers in the optical communications sector.

The movement is driven by persistent market concerns over the pace of AI infrastructure capital expenditure. Capital is rotating away from the high-investment, uncertain-return AI hardware narrative toward more cautious positioning. Optical modules and high-speed interconnect demand are highly dependent on AI data center capex, making optical communications a frontline casualty when spending momentum is questioned. The broader sector saw Corning fall nearly 19%, Coherent drop over 12%, and Ciena decline over 10% during regular trading on July 28, after Corning's Q3 revenue guidance of $4.9–5.0 billion came in at or below consensus, intensifying doubts about near-term demand visibility across the supply chain.

(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.)