Global tech stocks tumble $1tn as Democrats win US midterms and AI fears mount

Global technology stocks experienced a significant decline on Friday, November 6, 2026, following the Democratic Party’s sweeping victory in the United States midterm elections. The market reaction was immediate and severe, with major tech corporations including Apple, Tesla, and Nvidia shedding approximately $1 trillion in combined market value within a single trading session. This sharp drop in equity values has raised questions among analysts and investors about whether the current valuation of artificial intelligence (AI) assets represents a bubble that is now at risk of bursting.

The sell-off was not limited to the United States. European share prices also tumbled as global investors grappled with uncertainty surrounding the future of AI stocks. The primary driver of this anxiety appears to be the political shift in Washington. Democrats, who have won control of the US Congress, are viewed by some market participants as likely to curb the development of AI data centres. These facilities have become widely unpopular among US voters, suggesting that the incoming legislative majority may pursue regulatory measures or policy changes that restrict the rapid expansion of AI infrastructure.

Background

The volatility in markets follows a period of intense investment in the AI sector, which has led to high valuations and significant debt accumulation by tech firms to finance data centre rollouts. Prior to this week's election results, the tech-heavy Nasdaq index had already shown signs of instability. The political outcome has now compounded these existing market jitters.

Central bank officials have begun to address the implications of this market shift. Mary Daly, President of the Federal Reserve Bank of San Francisco, stated on Friday that the US central bank may need to raise interest rates further to combat high inflation. She described the recent movement in technology stocks as a "painful" but orderly repricing, noting that investors are reassessing the risks associated with AI-driven demand growth. Daly emphasized that while the world is volatile, the central bank must act deliberately and gradually, but acknowledged that further rate hikes are likely if the economy requires them.

International Monetary Fund Managing Director Kristalina Georgieva also weighed in, speaking at the IMF headquarters in Washington. She advised that central bankers worldwide must consider any potential slowdown in AI-driven growth when assessing their strategies to fight inflation. Georgieva noted that concerns over dependence on the AI investment boom and high valuations are impacting markets globally, adding that this volatility complicates the task of maintaining price stability.

Why it matters

The decline in stock markets has broad economic implications, particularly in the United States where share ownership is widespread. Many Americans rely on individual retirement funds invested in stocks and bonds, rather than government-funded pensions. A sustained market downturn would directly impact the spending power of these individuals, especially retirees, creating wider economic risks.

Furthermore, a market crisis could reduce spending by the wealthiest individuals, who have previously compensated for the spending pullback among average Americans caused by the inflation spike resulting from the US war against Iran. The situation is further complicated by rising interest rates, which increase borrowing costs for the billions of dollars in debt that AI firms have taken on to finance their infrastructure. Tighter financial conditions and higher cash needs may make investors wary of providing additional capital, potentially leading to a reduction in exposure to the sector and a slowdown in AI projects.

In the UK, the FTSE 100 index fell 1.01% to 10,673.94 points, touching a more than three-week low during the session before closing with a weekly decline of 0.5%. The midcap FTSE 250 slipped 0.80%, though it managed a tiny weekly gain. This broad risk-off move highlights the interconnectedness of global markets and the sensitivity of financial assets to political developments in the US.