Global financial markets have suffered a sharp sell-off as growing concerns about artificial intelligence investment, potential regulatory restrictions, and the future expansion of data centres rattled investors, wiping nearly $3 trillion off the combined market value of S&P 500 companies.
Wall Street led the downturn on Thursday, November 5, with technology stocks posting some of their steepest losses in months after the Democratic Party’s sweeping victories in the United States midterm elections.
According to Reuters, investors fear that Democrats’ increased political control could lead to tighter scrutiny of artificial intelligence companies and restrictions that slow the construction of data centres powering the AI industry.
The S&P 500 fell 4.36 per cent to close at 7,353.73 points, losing 334.89 points in its worst daily performance since April 2025.
The technology-focused Nasdaq Composite dropped 5.52 per cent to 24,315 points, its steepest one-day decline in 19 months. The decline pushed the index more than 10 per cent below its October 6 record closing level, placing it in correction territory.
The Dow Jones Industrial Average also fell 1,833.06 points, or 3.44 per cent, to close at 51,523.06.
Data reported by Reuters put the loss in S&P 500 companies’ combined market capitalisation at approximately $3 trillion. Nasdaq-listed technology companies also suffered substantial losses, with reports putting the decline in their market value at about $2.5 trillion.
AI regulation fears shake investor confidence
The political developments have added to existing concerns about the enormous amounts technology companies are spending on artificial intelligence infrastructure.
Investors are increasingly questioning whether the money being poured into advanced chips, computing facilities and data centres will generate sufficient returns.
The Democratic victories have intensified those concerns, particularly because some elected officials and local communities have opposed new data-centre developments over their electricity consumption, environmental impact and potential effects on household energy bills.
Reuters reported that the election outcome raised concerns that a slower pace of data-centre construction could weaken demand for AI chips, computing equipment and related infrastructure.
Michael O’Rourke, chief market strategist at JonesTrading, said the slowdown in data-centre construction was a major concern for investors following the election results.
The concerns have also affected companies that supply the semiconductor equipment and computing capacity needed to operate AI systems.
Nvidia shares fell more than 9 per cent during Thursday’s session, while Advanced Micro Devices (AMD) plunged approximately 17 per cent. The Philadelphia Semiconductor Index, which tracks major semiconductor companies, dropped more than 12 per cent.
Asian markets feel the pressure
The sell-off extended into Asian markets on Friday, November 6, as investors reacted to the sharp losses on Wall Street.
Japan’s Nikkei 225 fell approximately 6 per cent, recording its steepest one-day decline since April 2025.
South Korea and Taiwan also fell sharply, with benchmark stock indices dropping during early trading.
The pressure on Asian markets reflects the region’s exposure to global semiconductor and technology supply chains, particularly companies involved in chip manufacturing and supplying equipment for AI infrastructure.
Investors also moved towards safer assets amid uncertainty over the direction of technology stocks and the broader market.
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Markets show signs of stabilisation
Despite the previous day’s heavy losses, US stock futures began recovering on Friday as some technology shares stabilised.
Reuters reported that Nasdaq futures rose 1.48 per cent in early trading, while S&P 500 futures gained 0.39 per cent. Nvidia also advanced in pre-market trading after its sharp decline on Thursday.
However, the early recovery did not erase the previous session’s losses, and investors remained cautious about the outlook for AI-related stocks.
The market reaction highlights artificial intelligence’s growing influence on global financial markets. While AI investment has helped drive technology valuations to record levels, concerns about infrastructure costs, profitability, regulation, and energy demand are now contributing to increased volatility.
The latest sell-off does not establish that the AI industry is collapsing. Rather, it reflects investors reassessing the risks, costs and potential returns of the enormous investments supporting the global AI boom.
Senior AI Writer
Bio: Okikiola is a writer and AI enthusiast with a background in Office Technology and Management. She later pursued an MSc in International Business at De Montfort University (DMU). With extensive experience in administrative and business roles, she now explores how artificial intelligence can transform work, innovation, and everyday life.