On May 20, Cambridge Industries Group fell 4.84% in regular trading, trading at 148.6 HKD/share, with trading volume of approximately HKD 244 million.

On the news front, the optical communications sector has been under sustained selling pressure as profit-taking intensifies. The sector has accumulated substantial gains year-to-date, with valuations at elevated levels. Peer companies have reported disappointing results — YOFC posted first-quarter net profit significantly below market expectations of RMB 800-1,000 million, while optical module giant Lumentum's revenue also fell short of analyst consensus, fueling broader concerns over sector fundamentals.

Despite Cambridge Industries stating at its earnings briefing that high-speed optical module orders remain robust with annualized 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 continues to adjust amid overall weak sector sentiment. Analysts note that under high-valuation conditions, any deviation in earnings execution or guidance can trigger sharp price swings across the sector.

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