On March 10, the fiber optics sector on the A-share market suddenly surged in the afternoon, with Changfei Fiber (601869.SH) experiencing a sharp rise and hitting the upper limit of the daily price fluctuation. Industry giants such as Fuji Communication, Hengtong Optic, and Zhongtian Technology also saw significant gains. This surge is driven by the AI boom, which has dramatically increased the price of fiber optic cables, the underlying infrastructure.

Spot Price "Soars": G.652.D Has Multiplied Several Times Since the Start of the Year

According to the latest industry monitoring data, the fiber optic market is undergoing an unprecedented price reshaping. Due to the dual pressures of data center and drone demand, the spot price of mainstream G.652.D fiber has broken through the 50 yuan threshold.

Even more surprising figures come from Open Source Securities's in-depth research: as of March 4, the price of single-mode G.652.D fiber has soared from 18 yuan per kilometer before the Spring Festival to 85~120 yuan per kilometer, with a range increase of nearly 650%; while the increase in G.657.A1 has also approached 500%.

AI as the Core Engine: The "Appetite" for Fiber in Mega-Card Clusters Is Surprising

Why has fiber suddenly become a scarce resource? Guotai Haitong Securities report points out that the rigid demand for ultra-high bandwidth and low-latency transmission in intelligent computing centers has completely changed the industry logic:

  • Tenfold Demand Increase: The fiber demand of a single intelligent computing center is several times or even ten times that of a traditional data center.

  • Mega-Card Cluster Consumption: A typical mega-card GPU cluster requires several ten thousand core-kilometers of fiber just for internal server interconnection.

  • Structural Shift: The share of demand for DCI (data center interconnect) scenarios driven by AI is expected to rise from less than 5% in 2024 to 35% by 2027.

Global Supply Depends on China: Output Stabilizes at Half of the Market

According to the latest data from the British Commodity Research Unit (CRU), global fiber output reached 662 million core kilometers in 2025, far exceeding previous expectations. Among them, China's fiber output was 372 million core kilometers, accounting for 56.3% of the global total. This means that in the global AI computing power construction arms race, Chinese fiber companies hold absolute speaking rights.

Valuation Reconfiguration: From "Cyclical Manufacturing" to "Core Growth"

Industrial Securities believes that the valuation system of optical communication companies is currently undergoing a restructuring window. As AI computing power infrastructure becomes the long-term main line, related companies are expected to move away from the cyclical label of traditional manufacturing and transform into core growth stocks.

After the leading optical module companies continue to lead, the supplementary momentum of the entire fiber optic industry chain is now being released. For investors, this may be another golden opportunity to invest in core assets of AI computing power.