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Markets

Global Markets Slide as AI Share Sell-Off Deepens on US Inflation and Debt Fears

An accelerating sell-off in AI-linked shares hit global markets after US inflation rose to a higher-than-expected 3.7%, raising expectations of further Federal Reserve rate increases. South Korea’s Kospi 200 fell 8.1% and triggered circuit breakers, while Japan, China, Europe and US futures also declined.

AI News Feed · 2026-10-15 18:56

SK Hynix plunged nearly 11% and Samsung Electronics fell 9.5%, according to the report. The Kospi 200 closed at a six-month low, down 8.1%.

In Japan, the Nikkei 225 dropped 4.9% on Thursday after memory chip maker Kioxia slumped 11% and SoftBank, a large investor in ChatGPT owner OpenAI, fell 10%.

The declines followed a slide on Wall Street in the previous session, where the Nasdaq Composite fell 1.9% and the S&P 500 dropped 1.1%, its worst performance since July.

The market turmoil came after US data showed inflation rose to a higher-than-expected 3.7% in September, the fastest increase since the consumer price index hit a three-year peak of 4.2% in May. Investors now expect fresh interest rate increases by the US Federal Reserve, with some pricing in another increase as soon as the end of the month.

Deutsche Bank analysts led by Jim Reid said: “Markets have just had an incredibly tumultuous 24 hours, as a strong US CPI print was then followed up with mounting fears around the AI trade.” Reid said the figures showed the increase was not only about fuel costs, which have been pushed up by geopolitical tensions including ripple effects from the US war on Iran. “This wasn’t just an energy surge driving prices higher, as there were broad-based moves across the consumer basket,” he said.

The sell-off followed warnings from the International Monetary Fund, which said earlier this week that the threat of an AI share price crash rippling across global markets is putting world financial stability at risk. “The consequences of an AI correction could be global,” it warned. Aside from the US, Asian markets would be most exposed, with the UK and eurozone potentially more insulated, although investors with US holdings would be hit.

The jitters hit China, where Shanghai’s CSI 300 slipped as much as 2.4%, the lowest level since August 2025. In Taiwan, TSMC fell 2% despite reporting its sixth straight quarter of profits. European stocks were lower at the start of trading: the Europe Stoxx 600 was down 0.4%, the UK’s FTSE 100 down 0.06%, France’s CAC 40 down 0.19%, Spain’s Ibex down 0.17%, and Germany’s DAX down 0.53%. In the US, stock futures pointed to losses for tech stocks, with Nasdaq 100 futures dropping 1%.