The financial bubble around artificial intelligence is looking increasingly brittle. According to Mediapart, trading on U.S. exchanges turned into a rout on Thursday, 5 November 2026, after the Democratic victory in the midterm elections first appeared to please Wall Street but then gave way to anxiety about possible rules for the AI sector.
Mediapart reports that the Nasdaq dropped 5.5 percent that day, a slide that pulled Asian and European markets down with it. The outlet frames the episode as evidence that a bubble built on relentless momentum can no longer absorb even a modest slowdown.
Why it matters
The swing described by Mediapart is notable for how quickly sentiment reversed. Investors initially welcomed the election outcome, according to the outlet, but the shift toward expecting AI regulation was enough to trigger a sharp sell-off in technology stocks. That sequence suggests the market's confidence in AI valuations rests on the assumption of uninterrupted growth rather than on tolerance for policy risk.
For ordinary investors, the read-through is that a sector carrying a large share of index gains can move abruptly on political signals alone. For policymakers, it is a reminder that the mere prospect of oversight now carries measurable market weight.
A week of turbulence across regions
The Thursday session was not an isolated event. Mediapart describes several jolts in the preceding weeks before the 5 November plunge, indicating that pressure had been building on AI-linked stocks well before the midterm result.
The fallout was not confined to the United States. Mediapart reports that markets in Asia and Europe followed Wall Street lower, showing how tightly the AI trade has linked financial centres around the world. Other outlets tracked the same anxiety. Le Figaro, cited in the same reporting roundup, described turbulence on Wall Street reviving fears that the AI bubble is bursting, while Orange Actualités reported European markets in the red as Wall Street tried to recover.
The question of whether the bubble is genuinely deflating was raised openly elsewhere. Le Grand Continent published a piece asking whether the AI bubble is truly bursting, and Boursorama noted that attention was shifting to technology company earnings due the following week after the sell-off.
Earnings become the next test
That pivot to results is the practical consequence of the sell-off. When valuations depend on expectations of future growth, quarterly figures become the moment when those expectations are either validated or challenged. Mediapart's account implies that investors are now looking to corporate results for reassurance rather than treating the AI story as self-evidently sound.
The broader picture Mediapart paints is of a market that has priced in continuous expansion and has little room for disappointment. A single political development was sufficient to erase 5.5 percent from the Nasdaq, and the effect travelled quickly beyond U.S. borders.
What happens next will likely be determined by the earnings reports due the following week, which Boursorama identified as the focus of attention after the decline.
