Asian equity markets suffered a sharp sell-off on Tuesday, driven by intensifying investor anxiety over artificial intelligence valuations and uncertainty surrounding the upcoming US Federal Reserve policy decision.

The Taiwan Weighted Index (TAIEX) faced heavy selling pressure, breaking below the psychological 40,000-point level during trading hours.

18 points at 40,039.18, narrowly reclaiming the 40,000 threshold by the session's end.

The index ultimately closed down 1,564.18 points at 40,039.18, narrowly reclaiming the 40,000 threshold by the session's end.

Currency markets also experienced significant volatility.

The New Taiwan dollar (TWD) weakened against the US dollar, breaching the 32.50 barrier and hitting a 15-month low of 32.528.

The depreciation reflected broader risk-off sentiment across Asian assets.