A Sea of Red on Wall Street
The technology-heavy Nasdaq Composite index experienced its worst single-day drop since April 2025, plunging over 5% on Thursday, November 5, and wiping out trillions in market value. The S&P 500 also saw its biggest decline in months, falling 4.4%. This
sharp downturn marks a dramatic reversal from the rally seen just a day prior and has placed the Nasdaq in what analysts call 'correction territory'—more than 10% below its recent peak. The sell-off was not confined to the US, with Asian and European markets also falling sharply in response.
Political Shifts Rattle Investors
The primary trigger for the market anxiety appears to be the results of the US midterm elections. Democrats' victories have fueled investor fears of increased regulation and scrutiny over the AI industry, particularly the construction of new data centres. Several states, including Texas, a major hub for planned data capacity, elected officials who campaigned on promises of moratoriums or stricter controls on these resource-intensive facilities. Analysts suggest that up to 20% of planned AI-focused data centres in the US could now face significant delays or cancellation, creating uncertainty around the pace of the AI buildout.
Chipmakers at the Epicentre
Semiconductor stocks, the 'picks and shovels' of the AI revolution, have been hit especially hard. The Philadelphia Semiconductor Sector index suffered its worst day since March 2020. AI darling Nvidia saw its stock plunge over 9%, erasing all its gains for 2026. Other major players like Advanced Micro Devices (AMD), Intel, and Micron also experienced dramatic drops, with AMD falling 17.3% and Micron down 17.5%. The sell-off extended to memory makers like SanDisk and Western Digital, which tumbled 22% and 17% respectively. The sudden downturn reflects fears that a slowdown in data centre construction will directly impact demand for the high-powered chips these companies produce.
Data Centres Feel the Chill
Companies that build and operate the massive data centres essential for AI have also seen their valuations plummet. So-called 'neocloud' firms that rent out computing power, such as CoreWeave and Nebius, saw their shares fall by approximately 10% and 15%, respectively. The concern is twofold: political headwinds may slow the approval and construction of new facilities, and broader economic factors, including higher interest rates, are making investors nervous about the massive capital expenditures required for the AI buildout. This has led to a reassessment of the growth prospects for a sector that had been a market leader for much of the year.
What Happens Next?
While the sell_off has been severe, some analysts are urging a long_term perspective. A partial recovery in tech stocks on Friday, November 6, saw bargain hunters stepping in, though the gains did not fully erase the previous day's losses. Some experts believe the political fears may be overblown, suggesting that new administrations are likely to take a pragmatic approach to data centre development given the jobs and tax revenue they generate. The fundamental demand for AI and the computing power it requires has not disappeared. However, the market is now grappling with a new set of risks. The episode highlights the concentration of risk in a few key technology names and the market's sensitivity to political and regulatory shifts. For now, volatility seems set to continue as investors weigh the durable, long_term trend of AI against new short_term uncertainties.
