Taiwan's stock market jumped to its highest level since late June, driven by tech stocks — good news for investors, though thin trading volume raises doubts about how much further it can run.

• The main index rose sharply to close near 47,326, its best level since late June.
• Chip and electronics names led the charge, with MediaTek out front and UMC hitting its daily limit up.
• Foreign investors piled in, buying heavily and trimming their bets against the market in futures.
• Analysts say the index needs to stay above its three-month average, around 45,000, to make a run at the old high near 48,218.
• The catch: trading volume is still low, a sign buyers are cautious about chasing prices higher.

Outlook: The market is expected to grind higher in choppy trade this week, roughly between 45,000 and 48,000, unless volume picks up enough to push it to a new high.