Taiwan's stock market jumped back over the 46,000 mark after strong Nvidia results, good news for tech investors but with warnings that the rally is running on thin trading volume.

• Nvidia's earnings report pulled the whole Taiwan market up, with the index gaining more than 500 points at the high before closing up modestly.
• TSMC held near 2,410 and remains the anchor of the market, with analysts still bullish on it for the medium and long term.
• Apple foldable-phone suppliers and optical stocks caught fire, with Largan hitting a record and jumping over 30% in three days to become Taiwan's third most expensive stock.
• Trading volume is the catch — the market needs to get back above NT$800 billion a day, ideally toward NT$1 trillion, to push on to 47,000–48,000.
• Shipping stocks lagged and a trading-system outage locked some investors out of their brokerage apps during the busiest part of the morning.

Outlook: If foreign buying and volume keep building, 46,500–47,000 is the next test; if 46,000 breaks, attention shifts to whether support near 45,800 holds.