Coherent's Pullback Meets Growing AI Thermal Demand as Optical Interconnects Gain Relevance

What happened

Coherent shares have pulled back from their June highs, with the stock cooling off as AI infrastructure spending hits a physical wall of heat dissipation for high-power processors. This thermal challenge is reinforcing the case for optical interconnects, which Coherent supplies through its indium phosphide-based transceivers and lasers, offering a lower-power alternative to copper links. The latest DeepValue report remains constructive on the company's manufacturing edge and execution, but cautions that the stock at $333 (as of early July) already priced in much of the near-term AI optical ramp. Recent fundamentals remain strong: Q3 FY26 revenue grew 20.5% Y/Y, with Datacenter & Communications up 41%, and non-GAAP gross margin at 39.6%, though cash conversion remains weak due to inventory build. The pullback may be bringing the stock closer to the report's attractive entry of $285, but no margin of safety exists yet, and investors should await further confirmation of sustained margin and cash generation.

Implication

Investors should monitor execution closely: if the stock approaches $285 with gross margin holding above 39.6% and inventories stabilizing, it becomes an attractive entry for the long-term shift to optical interconnects driven by AI heat and bandwidth demands.

Thesis delta

The news reinforces the demand-side thesis for optical interconnects as AI heat problems accelerate adoption, but it does not change the core valuation concern. The stock's cooling off may eventually create a better entry, but the fundamental picture of strong demand and unproven cash conversion remains unchanged.