Asia stocks crumble after AI rout rocks US markets

November 6, 2026 11:38 | News

Asia’s tech-heavy markets sank on Friday as fear of increased regulatory scrutiny and a slowdown ‌in AI build-out unleashed the steepest fall in US stocks since the tariff-triggered “Liberation Day” rout a year and a ‌half ago.

South Korea’s KOSPI plunged more than 8.0 per cent, triggering exchange circuit breakers for a 20 minute trading halt while Japan’s Nikkei was down 5 0.per cent.

Wall Street’s volatility “fear gauge” soared, the Nasdaq sank 5.5 per cent and $US3 trillion ($A4.3 trillion) was wiped off S&P 500 companies, with investors worried Democrats, who swept to power at the midterm elections this ‌week, will apply ‌the brakes to ⁠the AI boom.

The political jitters are hitting an AI trade already ​on shaky footing due to worries about the return on investment for the enormous sums of money being poured into the technology.

Market participants see Asia’s chipmakers and data centre equipment suppliers in South Korea, Taiwan and Japan as especially vulnerable and they had already tumbled on Wednesday and Thursday.

“It’s pretty clear there’s been a real ⁠shift in sentiment,” said Michael McCarthy, chief executive for Australia ‌and ​New Zealand at online brokerage Moomoo.

“Market turning points are often accompanied by strong disagreement, and that shows up ​in the market ‌by huge swings in either direction,” he said. “That’s what we appear to have had — and last ​night’s emphatic sell-down suggests that is the direction that we’re now headed in.”

The selling indicates investors are starting to factor in increased local opposition to building data centres, with analysts saying ​markets ​have yet to fully consider the cost ​such building has imposed on communities.

The Philadelphia Semiconductor Index ‌slumped 12.2 per cent overnight and the Nasdaq, which reversed an initial swing higher after the midterms before dropping, has now shed 12 per cent from its record high close a month ago.

Bonds were poised to gain in Asia, while the US dollar slipped against haven currencies such as the yen and Swiss franc.

“Treasuries can probably rally ​a lot further,” said Nick Ferres, chief investment officer at Vantage Point Asset Management in Singapore. “And I ​suspect it will be an ⁠ugly day for semiconductor and memory (stocks).”

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