LONDON, 6 November 2026 – EBM Newsdesk Analysis.Nick Staunton
Investors have wiped trillions of dollars from global equity markets in a sudden reassessment of the artificial intelligence boom. Fears over regulation, data-centre construction and the returns from colossal technology spending triggered one of Wall Street’s sharpest sell-offs in more than a year.
The Nasdaq Composite plunged 5.5 per cent on Thursday, its steepest one-day fall since April 2025, while the S&P 500 dropped 4.4 per cent. Reuters reported that nearly $3 trillion had been erased from the market value of S&P 500 companies. The selling spread across Asia on Friday before reaching Europe, putting AI-linked valuations under renewed scrutiny.
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SubscribeThe Political Trigger
The immediate catalyst was the US midterm election result, which handed Democrats control of both chambers of Congress. Investors fear a changed political balance could bring tougher scrutiny of AI, constrain data-centre expansion and complicate approvals for new infrastructure.
The concern is that regulatory uncertainty, local opposition and pressure over electricity demand could delay the projects underpinning the sector’s growth expectations.
Asian markets felt the shock quickly. Japan’s Nikkei fell around 6 per cent, while technology-heavy markets in South Korea and Taiwan also suffered steep losses. Semiconductor manufacturers and data-centre equipment suppliers were among the most exposed.
The Spending Question
The sell-off has exposed a deeper anxiety building through the latest earnings season: can the money being poured into AI generate profits quickly enough to justify the spending? Alphabet, Meta and Amazon have signalled enormous investment requirements, while investors are increasingly concerned that companies are turning to debt to fund data centres, chips and computing infrastructure.
The issue is not whether AI will transform business. It is whether financial returns will match the scale and speed of investment now priced into equity markets. EBM has examined whether the AI bubble is finally bursting, the pressure on memory-chip stocks and the latest Intel and Amazon-led sell-off.
Europe Catches the Contagion
European shares fell on Friday, with the STOXX 600 down around 1 per cent in morning trading. London’s FTSE 100 was 2.2 per cent lower by 11.43am GMT, while Germany’s DAX and France’s CAC 40 retreated. Europe has less direct exposure to US technology giants, but its chip-equipment, power and industrial suppliers remain tied to the data-centre investment cycle.
For companies such as ASML, Infineon, Schneider Electric and Siemens Energy, a prolonged slowdown in infrastructure spending could matter as much as new regulation. The European Central Bank has warned that AI-driven equity valuations could be vulnerable to correction, while the Bank of England has raised questions about the technology’s implications for financial stability in its warnings about AI-related risks.
A Repricing, Not the End of AI
The rout does not prove that AI’s commercial promise is fading. But investors are distinguishing between companies turning investment into measurable earnings and those whose valuations depend on future growth.
That distinction could define the next phase of the market. The AI boom may continue, but the era in which almost any company associated with it was rewarded is being tested. For technology groups, the message is becoming harder to ignore: ambition is no longer enough; the returns must follow.
