Your Money · Report · File No. 261106-302
Tech selloff goes global after Democratic midterm wins; Trump says 401(k)s dropped
U.S. tech stocks had their worst day since April 2025, and the losses spread to Asia and Europe on Friday. Investors fear a Democratic Congress will slow the AI buildout, and the drop can hit retirement accounts.
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A rout in technology stocks spread from Wall Street to Asia and Europe on Friday, after the Democratic midterm wins fed fears about the future of artificial intelligence, or AI 1. The selloff matters to anyone with a 401(k) or an IRA, because stock funds often hold large amounts of these companies.
What happened on Thursday
On Thursday, the tech-heavy Nasdaq 100 fell 6.3%, erasing $2.3 trillion in market value 2. The broader S&P 500 index fell 4.4%, wiping out $2.8 trillion 12. The Dow Jones Industrial Average dropped 1,833 points, or 3.4% 2.
Both the Nasdaq 100 and the S&P 500 had their worst day since April 2025 2. NBC News said the S&P 500 drop was its worst in 18 months, a stretch when President Donald Trump's global tariffs rocked markets 1. Nvidia fell 9.2%, and the Philadelphia semiconductor index fell 12.3%, its worst day since March 2020 2.
Friday: losses spread overseas
South Korea's Kospi index tumbled more than 8% on Friday, which set off a temporary market-wide trading halt 12. Samsung and SK Hynix, which make memory chips for AI data centers, plunged more than 10% early on 1. Taiwan's main index dropped 9% 1.
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Japan's Nikkei 225 fell as much as 6%, which put it in bear-market territory, and it had its worst week since 2020 1. London's FTSE 100 fell 1.6% at the open, and the French and German indexes took similar hits 1. U.S. stock futures were mixed early Friday 1.
Why investors are worried
NBC News tied the plunge to the election results, which will bring in a group of anti-AI and anti-data center politicians. They include Texas Gov.-elect Gina Hinojosa. Texas is the largest data center market in the country 1.
A Democratic Congress could look harder at AI infrastructure projects. That could cause delays and extra costs, which adds to investor doubts about whether the huge spending will pay off 1. Weak earnings from chipmakers Qualcomm and Arm also set off Thursday's selling 2.
Markets are being punished according to their dependence on the U.S. AI infrastructure cycle,
Trump blamed the election. On Truth Social he wrote that the market had one of its worst days in history and added that 401(k)s had therefore dropped 2. Analysts pointed to the AI industry itself. Ed Yardeni of Yardeni Research said he did not think the AI bubble was bursting, but that it was losing air "very, very rapidly." 2
What to watch next
The Nasdaq Composite tumbled into correction territory on Thursday, a decline of at least 10% 2. Whether the slide continues depends on how Asian and European markets finish Friday and how Wall Street opens. The sources reviewed did not say whether Congress has scheduled any action on AI or data centers.
The analysis is simple. A sharp one-day drop is not a permanent loss unless you sell. But older savers who are close to retirement have less time to recover, so a swing this large is worth a look at how much of your account is in tech funds.
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Sources
- NBC News, “Global market rout deepens after midterms intensify AI fears” (2026-11-06). nbcnews.com/business/markets/global-markets-tech-stocks-ai-m
- NBC News, “Stocks plunge as election outcome and AI worries crush tech shares” (2026-11-05). nbcnews.com/business/markets/tech-stocks-plunge-ai-midterms-
- Investing.com, “South Korea's KOSPI halts trade after 8% wipeout on AI losses” (2026-11-05). investing.com/news/stock-market-news/south-koreas-kospi-halt
Found an error? Tell the newsroom. Corrections are noted at the top of the story.
More from the files
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Data centers were on the ballot in at least 40 jurisdictions across 10 states, and voters approved nearly every moratorium. The backlash helped Democrats and now complicates the energy agenda in Washington.
Democrats' Texas sweep puts Musk's tax breaks, data centers and Starbase land at risk
Democrat Gina Hinojosa won the Texas governor's race and has promised to freeze data center approvals and review corporate tax breaks. Elon Musk spent heavily to stop her, and his companies' shares fell Wednesday.
Musk spent a record $446 million on the midterms and lost nearly every race
Elon Musk put at least $446 million into Republican campaigns this year, a single-cycle record, and Democrats won every Senate race where his main super PAC spent the most. The Texas contest he targeted most heavily went to Democrat James Talarico.
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