Strong Nvidia results have set off a fresh AI buying wave, pushing Taiwan's market to a new rebound high — good news for chip investors, at least for now.

• Taiwan's main index opened sharply higher, gaining more than 500 points on the AI rally.
• TSMC led the charge, opening up NT$35, with Largan, MediaTek, Foxconn and Delta also rising.
• Nvidia shares jumped nearly 9% in the US after its quarterly report, adding over $440 billion in market value in a single day.
• All four major US indices closed higher, with chip stocks and the Nasdaq leading.
• Attention is shifting from raw chip power to fast data transfer and optical networking, where Nvidia's new photonics switches are now in mass production and Taiwanese suppliers stand to benefit.

Outlook: The AI trade looks set to keep running near-term, though money is piling into a narrow group of tech names, which raises the risk of sharp swings.