Shares in Taiwanese optical communications maker LandMark Optoelectronics surged close to the daily limit-up, reaching their highest level since May — good news for shareholders, and a sign that demand for optical communications in AI data centres is still accelerating.

• NVIDIA's silicon photonics switches have entered volume production, lifting the entire optical communications supply chain.
• US-listed optical communications stocks Lumentum and Coherent also rose, with market sentiment leaning bullish.
• Data centre-related business now accounts for more than 80% of LandMark's revenue, with silicon photonics products the main driver.
• July revenue hit a record high, nearly tripling year-on-year, while after-tax profit rose fivefold.
• The company expects third-quarter revenue to grow by more than 20% quarter-on-quarter, with 1.6T silicon photonics products already in volume production.

Outlook: The share price is building momentum for a run at its record high of NT$3,305, and NVIDIA's upcoming earnings report will be the next key factor.