Optics stocks drop on Anthropic-linked sell-off, Corning slides
AI optical components makers fell hard on July 28 as optics stocks were hit by a sector-wide sell-off tied to Anthropic-related news and company guidance. Corning fell about 12% and Lumentum and AXT dropped roughly 10% and 12%, respectively, alongside declines in Coherent and Marvell.
The key trigger was the market’s reaction to Corning’s forward outlook. Corning still reported a Q2 beat (revenue $4.74B vs. $4.61B; EPS 78c vs. 76c), but the third-quarter guidance landed in line with or below investor expectations, driving a fast repricing. The article also notes a correlation across the optical supply chain: when Corning fell, peers moved in lockstep, showing limited idiosyncratic downside protection even for diversified sector exposure.
An additional driver was the Anthropic link. The Tema Photonics & Optical ETF (LAZR), which holds positions including Lumentum and AXT, reportedly allocates around 12% of its portfolio to Anthropic via a special purpose vehicle. The sell-off also underscores structural demand for high-speed optical interconnects used in hyperscale AI data centers, while policy uncertainty remains a risk, including US restrictions on certain Chinese optical imports.
For traders watching broader risk sentiment, today’s optics stocks move signals fragile positioning in “AI infrastructure” supply chains, where headline-linked repricing can quickly spill over into correlated names.
Bearish
The article’s core signal is not the earnings beat; it’s the market’s reaction to weaker-than-hoped forward guidance and Anthropic-related headline sensitivity. In past “AI infrastructure” sell-offs, traders often de-risk correlated supply-chain exposure quickly, and that can worsen broader risk sentiment (which typically spills into high-beta assets). Here, multiple optical component makers sold off together, highlighting crowded positioning and tight correlation—conditions that historically amplify short-term drawdowns.
Short term, this raises the probability of continued volatility and negative sentiment around AI build-out beneficiaries (even if fundamentals look intact). Long term, demand for high-speed optical interconnects is described as structurally supported (cloud customer agreements), which could limit how far the narrative damage lasts—especially if guidance stabilizes and trade-policy uncertainties (e.g., import restrictions) are clarified. Overall, expect bearish pressure on near-term sentiment, with potential for mean reversion if guidance improves.