Taiwan's market roared past 46,000 points on AI enthusiasm, with lens maker Largan Precision leading a speculative surge that has nearly doubled its share price in a month.

• Largan hit a record high after rumors it may become a direct Nvidia supplier of fiber array units, though the company will only say it is focused on fiber array development.
• Largan is spending heavily on expansion, announcing its fifth property purchase this year and taking total land and building spending past NT$6 billion.
• Nvidia's strong earnings lifted US tech stocks and carried Taiwan's index to a new rebound high, with foreign investors buying for a third straight day and turnover topping NT$1 trillion.
• Chip substrate leader Unimicron was searched by prosecutors over alleged commercial offenses, with two vice presidents and an accountant taken in, sparking fears of a share price collapse.
• TSMC paid out its August profit-sharing bonuses, and four small-cap stocks were placed under trading restrictions after excessive volatility.

Outlook: The AI-driven rally has room to run on Nvidia's momentum, but Largan's vertical price move and the Unimicron probe leave the market exposed to a sharp pullback.