On July 31, Lumentum rose 5.26% in pre-market trading, trading at $725.93/share, with turnover of $5.57 million. The stock continues to rally as Microsoft's strong earnings report reignited market confidence in AI compute infrastructure spending, driving capital back into optical communications upstream names.

The optical communications sector had previously suffered a sharp selloff after Corning's Q3 guidance disappointed, with its core sales forecast upper limit merely matching consensus expectations, triggering broad-based declines. Lumentum had pulled back significantly from its highs amid concerns over the pace of AI infrastructure capital expenditure. Following Microsoft's confirmation that AI infrastructure investment intensity remains undiminished, the sector entered a recovery channel. Peers Applied Optoelectronics rose 6.43%, Nokia gained 4.62%, and Ciena advanced 2.95%, with the broader optical communications segment sustaining its rebound trajectory.

Lumentum's next earnings report is expected on August 11 after market close, with consensus EPS estimates at $2.62. Barclays recently upgraded the stock to Overweight with a $1,000 price target, citing the company's pricing power amid supply shortages in core laser components.

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