On May 21, Cambridge Industries Group (06166) fell 3.2% in regular trading, trading at 141.9 HKD/share, with trading volume of approximately HKD 432 million.

On the news front, the optical communications sector has been under sustained selling pressure as the sector has accumulated significant gains year-to-date, pushing valuations to relatively elevated levels and intensifying profit-taking. Key sector peer YOFC reported first-quarter net profit significantly below market expectations, while optical module giant Lumentum posted revenue slightly below analyst consensus, fueling broader concerns over the industry outlook. The stock has weakened for multiple consecutive trading days since May 18.

Despite Cambridge Industries Group stating at its earnings briefing that high-speed optical module orders remain robust with annualized production capacity of 3.5 million units and active expansion of domestic and overseas production bases to ensure delivery of 800G and 1.6T products, the stock has continued to track the broader sector adjustment. The company reported Q1 revenue of RMB 1.287 billion, up 43.98% year-over-year, and net profit of RMB 118 million, surging 276.44%.

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