Taiwan index falls 2.5% as the AI selloff nears correction

What happened. On Friday, October 30, Taiwan's main index, the Taiex, fell 2.49% (1,156.50 points) to close at 45,211.83. Investing.com reported the fall as 2.53% and a new one-month low. The gap is in the hundredths and comes from how it is counted. The story is the same. Searches jumped on Monday, November 2, as people reacted to Friday's session, not to a new fall.

How close is a correction. A correction means a fall of 10% or more from a record high. Bloomberg says the index was down as much as 3.5% on Friday and traded more than 10% below its October 6 record. It recovered some of that by the close and narrowly avoided a correction on that measure. We do not have an exact distance from the record at the close, so we do not give one.

Why. The cause is not Taiwan itself but a global selloff in AI-linked shares. Bloomberg lists three worries: higher borrowing costs, massive AI spending and some weaker-than-expected earnings. On Friday the Nasdaq fell 2.86%, the Philadelphia Semiconductor Index 7.20% and TSMC's US-listed shares 5.95%. TSMC is more than 40% of Taiwan's total market value, so moves like this reach the Taiex fast. At the close TSMC shares lost 2.0%, MediaTek 4.2% and Delta Electronics 9.8%.

What analysts say. Vey-Sern Ling of Union Bancaire Privee says the Taiwan selloff has mostly been driven by sentiment tied to global moves in AI stocks. Tony Huang of Taishin Securities Investment Advisory noted that AI development has not slowed, as Meta, Alphabet, Amazon and Microsoft have kept their big spending plans. These are their views, not facts.

What next and what is not known. The index broke below support near 45,300 points, where its 120-day moving average sits. It lost 4.7% in October, and foreign investors were net sellers of Taiwanese shares worth NT$994.3 billion (US$30.61 billion). On Monday morning, per Trading Economics, the Taiex was down about 0.5% (44,991 points). We do not know Monday's close at the time of writing. This is an overview, not advice.

Confirmed facts

• On Friday, October 30, 2026 the Taiex fell 1,156.50 points, or 2.49%, to close at 45,211.83.^[3][4]
• Investing.com reported the Taiwan Weighted index down 2.53% at Friday's close, to a one-month low.^[1]
• Per Bloomberg, the Taiex closed 2.5% lower after falling as much as 3.5% during the day, when it traded more than 10% below its October 6 record, and narrowly avoided a technical correction.^[2]
• Bloomberg ties the fall to a global selloff in AI shares: investors worry about higher borrowing costs, massive AI spending and some weaker-than-expected earnings.^[2][5]
• On Friday the Nasdaq Composite fell 2.86%, the Philadelphia Semiconductor Index 7.20%, the S&P 500 1.8% and TSMC's US depositary receipts 5.95%.^[3]
• At Friday's close TSMC shares lost 2.0%, MediaTek 4.2%, Delta Electronics 9.8% and Hon Hai 3.0%. TSMC is more than 40% of Taiwan's total market value.^[4]
• The Taiex broke below support near 45,300 points, where its 120-day moving average sits. The day's intraday low was 44,726.^[3]
• The Taiex lost 4.7% in October. Foreign institutional investors were net sellers of Taiwanese shares worth NT$994.3 billion (US$30.61 billion) in October.^[3][4]
• On Monday morning the Taiex was down about 0.5%, at 44,991 points.^[4]
• Vey-Sern Ling of Union Bancaire Privee: the Taiwan selloff has mostly been sentiment-driven due to global moves in AI stocks.^[5]
• Tony Huang of Taishin Securities Investment Advisory: AI development has not slowed, and Meta, Alphabet, Amazon and Microsoft have kept their commitments to big AI infrastructure spending.^[3]

Implications

• ConfirmedTaiwan's market is closely tied to global AI shares: the fall comes from a worldwide selloff, not local news.
• Our readingWhile AI shares on Wall Street stay under pressure, pressure on the Taiex is likely to continue. This is our view.
• Our readingA close in correction territory is possible if the selloff goes on. This is our view.

Still unknown

• Where the Taiex closed on Monday, November 2
• How far Friday's close is from the record close
• Whether the AI stock selloff in the US continues

Who it affects

Taiwan, World. People who follow AI stocks, chipmakers and Asian markets

Sources

1. Investing.com India: Taiwan shares lower at close of trade; Taiwan Weighted down 2.53% October 30, 2026 · media
2. Bloomberg: Taiwan Stocks Near Correction as Global AI Selloff Deepens October 30, 2026 · media
3. Taipei Times: US sell-offs pose challenge for TAIEX November 1, 2026 · media
4. Trading Economics: Taiwan Stock Market Index (TWSE) November 2, 2026 · media
5. Moneyweb (Bloomberg): Taiwan stocks heads for correction October 30, 2026 · media