Optical Stocks Sold Off on AI Funding Fears, Not New Company Data

AAOI, Lumentum and Coherent fell sharply as investors questioned AI infrastructure funding. Lumentum's latest operating disclosures still show strong growth, making the selloff a test of expectations rather than evidence of a fresh business break.
Applied Optoelectronics, Lumentum and Coherent fell together as investors reassessed how aggressively artificial-intelligence infrastructure will be financed. The synchronized move matters because it points to a sector-level valuation shock, not a newly disclosed operational failure at one supplier.
That distinction does not make the risk imaginary. Optical-component companies have been priced for rapid spending on data centers, interconnects and advanced networking. If financing becomes more expensive or customers delay projects, orders can move out and richly valued suppliers can fall before revenue estimates change.
Lumentum's recent disclosures provide useful context. The company said fiscal 2026 revenue rose 83% to $3.0 billion and non-GAAP earnings per share increased 321% to $8.67. Fourth-quarter revenue exceeded $1 billion, while its optical circuit switch business reached an annualized quarterly run rate above $100 million. Management also guided to triple-digit growth for that business in the first quarter of fiscal 2027.
Those figures show real demand, but they also explain why expectations are fragile. When a stock has already captured years of anticipated AI investment, strong current growth may not protect it from a lower valuation multiple. Investors need to separate three questions: whether customers still need more optical capacity, whether spending schedules are changing and how much future growth is already reflected in the shares.
The technology trend remains favorable. Lumentum, Astera Labs and Corning recently demonstrated an optical PCIe connection aimed at AI rack-scale systems, where conventional copper links face reach, density and power constraints. That is evidence that optical links are moving closer to computing hardware, but a demonstration is not the same as a volume order.
Retail comments predicting rebounds or price targets provide no reliable evidence about demand. The next decisive signals will come from order backlogs, customer concentration, lead times and guidance. The selloff is best read as a repricing of AI capital-spending risk until company filings show a genuine change in operations.
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