Coherent Corp. (COHR) shares climbed approximately 17% during Tuesday's midday trading, significantly outperforming the broader market. The stock was last seen at $425.44, up $62.54, after reaching an intraday high of $433.12.
This rally was part of a broader surge in optical-networking stocks, driven by renewed investor focus on AI infrastructure demand and supply chain bottlenecks. The SPDR S&P 500 ETF Trust (SPY) was up only about 0.2%, highlighting that Coherent's move was company-specific rather than market-wide.
Investors are once again chasing the "picks and shovels" of artificial intelligence—the less visible hardware that enables faster data movement within AI systems. Photonics, which uses light for data transmission, is critical for AI data centers needing faster connections between chips, servers, and buildings.
Peers also benefited from the trend. Lumentum Holdings (LITE) rose about 11.7%, and Applied Optoelectronics (AAOI) gained approximately 9.5%, keeping the optical-networking group in focus after a volatile period.
The catalyst for the move includes a recent Barron's report highlighting J.P. Morgan analysts identifying AI "bottlenecks" as a key market theme. The report noted that photonics, where supply constraints could give suppliers pricing power, includes companies like Broadcom (AVGO) and Coherent.
Coherent's strong quarterly results provided concrete evidence of the trend. The company reported fiscal third-quarter revenue of $1.81 billion, up 21% year-over-year, with non-GAAP earnings of $1.41 per share. CEO Jim Anderson cited "accelerating revenue growth, expanding margins, and improving profitability" driven by datacenter and communications demand.
Looking ahead, Coherent guided for fiscal fourth-quarter revenue between $1.91 billion and $2.05 billion, with adjusted earnings of $1.52 to $1.72 per share. CFO Sherri Luther noted "strong visibility into ongoing robust demand" as the company ramps capital investment.
Nvidia's (NVDA) $2 billion investment in March remains a key driver. The filing revealed Nvidia bought 7.79 million Coherent shares at $256.80 each, supporting R&D, capacity expansion, and U.S. manufacturing. Nvidia also gained access to five additional Coherent product families tied to co-packaged optics.
However, risks remain. A stock that has moved this far is pricing in strong AI spending, smooth capacity expansion, and continued demand from large customers. Any delay in data-center orders, margin squeeze from heavy investment, or wobble in Nvidia-linked expectations could reverse the gains. Coherent's own filing warned that changes to the Nvidia purchase agreement or collaboration could hurt results.
