Optical Component Makers Rally on AI Infrastructure Thesis

Lumentum and Coherent surged following Bernstein's decision to initiate coverage with Outperform ratings, citing both companies as potential structural beneficiaries of AI infrastructure buildout. Lumentum reported fiscal fourth-quarter revenue of $1 billion, more than double year-over-year, and guided to $1.225-$1.275 billion for the current quarter. The stock trades at 14x forward revenue following a 150% gain this year, leaving limited room for execution missteps.

Bernstein's initiation of coverage marks the second significant analyst endorsement for Lumentum in under a month, underscoring sustained confidence in optical component suppliers positioned to benefit from artificial intelligence infrastructure expansion. The company's fourth-quarter performance demonstrated substantial momentum, with revenue doubling annually and shipments of optical circuit switches—devices that route data between servers using light—doubling sequentially, suggesting accelerating demand across the sector.

At a valuation multiple of 14 times forward revenue, investors have substantially incorporated expectations for continued growth into the stock price. The rating upgrade follows a 150% annual gain, leaving limited margin for operational disappointment or adverse developments in the macroeconomic environment, including rising interest rates and ongoing scrutiny of data center economics.