Coherent Jumps 7% as AI Demand Lifts Optical Stocks

Edgen Stock

·Mar 16 2026, 14:00

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Key Takeaways

US optical communication stocks climbed on March 16, propelled by surging demand for high-speed components essential for artificial intelligence and data center infrastructure. The rally highlights investor confidence in the sector's critical role in the ongoing AI build-out, with companies like Coherent and Lumentum seeing significant gains.

Sector-Wide Gains: On March 16, shares in optical communication firms rose broadly, with Coherent (COHR) gaining over 7% while Lumentum (LUMN) and Ciena (CIEN) each climbed more than 5%.
AI Infrastructure Driver: The rally is fueled by massive investments in AI data centers, which require advanced optical interconnects to handle immense data loads, a trend validated by Nvidia's recent $2 billion investment into the sector.
Coherent's Momentum: Coherent's market strength was recently underscored by its upcoming inclusion in the S&P 500 on March 23 and a 36% year-over-year increase in its data center revenue.

Coherent Leads Sector-Wide Climb With Over 7% Gain

Shares in U.S. optical communication companies advanced across the board on March 16, signaling strong investor appetite for firms enabling the build-out of AI infrastructure. Coherent (COHR) led the charge, with its stock price increasing by more than 7%. Other key players in the sector also saw significant gains, as Lumentum (LUMN) and Ciena (CIEN) both posted increases of over 5%. The synchronized movement points to a powerful sector-specific catalyst rather than isolated company news, with the market betting on sustained growth in data transmission hardware.

AI Boom Fuels 36% Growth in Data Center Revenue

The rally in optical stocks is directly tied to the explosive growth of artificial intelligence, which requires data centers to process and move unprecedented volumes of information. This has created a surge in demand for high-speed optical components that form the backbone of modern AI clusters. Companies are racing to supply 800G and 1.6T interconnects, the high-speed links connecting thousands of processors. Underscoring this trend, Coherent reported a 36% year-over-year increase in its data center revenue, driven by robust orders for its advanced optical products. Further validating the sector's importance, Nvidia recently made a $2 billion investment split between Lumentum and Coherent, cementing their role as critical suppliers in the AI ecosystem.

Coherent to Join S&P 500 on March 23

Coherent's recent performance earned it a spot in the prestigious S&P 500 index, effective March 23, 2026. This inclusion, which often triggers buying from index-tracking funds, reflects the company's growing market capitalization and strategic importance. The milestone follows a period of exceptional growth, with the company's stock rising 258% over the past 52 weeks. Coherent also delivered stronger-than-expected fiscal second-quarter results, with revenue climbing 17% year-over-year to $1.69 billion. While its valuation is now elevated, the performance demonstrates how central optical technology has become to the multi-year AI investment cycle.