Key Takeaways:
Applied Optoelectronics, Coherent and Lumentum shed a combined $12 billion in market value Thursday as a valuation-driven selloff swept through the AI optical-networking complex, interrupting one of the year's hottest trades.
Shares of high-flying photonics names slid sharply at midday with no company-specific catalyst. Applied Optoelectronics (AAOI) tumbled 17% to $114.93, its steepest single-session drop of 2026. Coherent (COHR) fell 10% to $331.57, while Lumentum (LITE) declined 10% to $720.91.
"The market is repricing the risk premium on these names after they ran up 80% to 233% year to date," said Rachel Kim, semiconductor analyst at Edgen. "The fundamentals haven't changed, but at 158 times earnings for Coherent and 128 times for Lumentum, there was almost no margin for error built into the stock prices."
The selloff extended beyond pure photonics plays. Nvidia (NVDA) slipped 2% and Intel (INTC) dropped 6%, while inverse semiconductor ETFs surged — a signal that defensive positioning swept across the AI-hardware complex heading into July. The VanEck Semiconductor ETF (SMH) fell alongside the group, though the CBOE Volatility Index held at 16.88, suggesting the move was sector-specific rather than a broad market panic.
The fundamentals that drove the rally remain intact. Coherent's fiscal third-quarter revenue rose 21% year over year to $1.8 billion, with datacenter and communications revenue jumping 41% as the company deepened its optical-networking partnership with Nvidia. Analysts maintain an average price target of $384 on Coherent, with 12 Buy and 4 Strong Buy ratings against 4 Holds.
Lumentum posted even sharper growth, with Q3 revenue surging 90% to $808 million. Management guided Q4 revenue to a range of $960 million to $1.01 billion, and the company disclosed a co-packaged optics order for first-half 2027 delivery alongside an optical-circuit-switch backlog exceeding $400 million — signaling continued design-in traction with hyperscale AI customers.
Applied Optoelectronics, the smallest of the three, is scaling fast on 800-gigabit transceiver demand tied to a large hyperscale customer. Datacenter revenue more than doubled year over year in the first quarter, and Chief Executive Officer Thompson Lin has guided full-year 2026 revenue to potentially exceed $1 billion. The company remains unprofitable, with trailing earnings per share of negative 65 cents.
The bull-bear split on the optical trade is widening. One camp views the pullback as a tactical entry into a multi-year AI-scaling cycle, citing hyperscaler capital expenditure on 800-gigabit and 1.6-terabit transceivers, co-packaged optics and optical circuit switches. The other camp flags stretched multiples and points to insider selling at all three companies in May and June — though those dispositions appear consistent with pre-scheduled Rule 10b5-1 plans and equity-compensation timing rather than directional bets against the businesses.
The next catalyst path is calendar-driven. Coherent and Lumentum will report fiscal fourth-quarter results later this summer, and hyperscaler capex commentary from mega-cap tech earnings arrives within weeks. For investors weighing photonics exposure, the key question is whether Thursday's selloff represents a healthy reset in an intact growth story or the beginning of a broader de-rating for a sector that had priced in perfection.
This article is for informational purposes only and does not constitute investment advice.
