Nasdaq Falls 5.5% as the AI Trade Cracks: $2.5 Trillion Wiped Out in a Day
Photo: Hippopx (public domain). Illustrative image.
What happened. Wall Street suffered one of its worst technology-led sell-offs on Thursday 5 November. The Nasdaq Composite fell 5.52%, its largest one-day percentage drop since the April 2025 tariff sell-off, and closed in correction territory — more than 10% below its recent peak, and nearly 12% below its record close on 6 October. The S&P 500 fell 4.36% and the Dow Jones lost 1,833 points. The Nasdaq-100, which tracks the exchange’s largest companies, fell 6.4%, erasing about $2.5 trillion in market value. It was the second straight day of selling in AI stocks, and the fifth decline of more than 500 points in the Nasdaq Composite since mid-October.
The damage concentrated in the suppliers. Chip and data-centre stocks fell hardest. The Philadelphia Semiconductor Index dropped about 12%, which Reuters called its second-largest one-day fall on record. Nvidia, the company most closely associated with the AI boom, fell about 9%. AMD and Micron each lost roughly 17%, memory maker SanDisk fell 22% and hard-drive maker Western Digital fell 17%. Tesla declined 11%. Neocloud companies that operate data centres — CoreWeave fell 10% and Nebius about 15% — were hit hard too. The buyers of that hardware held up better: Meta dropped about 4%, Amazon and Alphabet each slid 2.2%, and Microsoft fell about 3.6%.
Why investors sold. The trigger was not a single company result or a change in interest rates. It was a reassessment of the political risk attached to the physical buildout of artificial intelligence — the data centres, chips, power supplies and cooling systems the technology depends on — after the Democrats’ sweeping victory in the US midterm elections, winning both chambers of Congress. Investors fear tougher scrutiny of large-scale data-centre developments, delays to construction and higher costs. The concern intensified in Texas, a major hub for data-centre investment, where the incoming governor has proposed a temporary pause on new data-centre development and changes to certain business tax incentives. JonesTrading’s Michael O’Rourke told Reuters the lasting theme of the election is “the slowdown of the data center buildout.” Analysts cited by Fox Business see the buildout becoming slower and more expensive, and UBS analysts estimated that about 30% of anticipated US data-centre capacity growth in 2028 could be jeopardised by construction delays.
The backdrop: a buildout already under strain. The sell-off did not come from nowhere. The AI trade has been under increasing scrutiny for weeks, as investors ask whether the vast spending on infrastructure is producing adequate returns: Alphabet reported negative free cash flow of about $9.1 billion for the third quarter, its second straight negative quarter, on capital spending of $51.4 billion. Google announced a $17 billion investment in a Wyoming data centre, Meta said new data centres will be harder to build, and Microsoft delayed $5 billion of investment. OpenAI, for its part, responded within 48 hours of the election by publishing a National Community Compact and a Compute Campus Policy Blueprint, committing to drop non-disclosure agreements with public officials and to pay the full electricity and infrastructure costs of the facilities it owns.
What it does not mean. A market correction is not the same as a verdict on the technology. The tape does not read as a uniform exit from AI: the companies buying the hardware fell far less than the companies selling it, and the fear is about delays and approvals, not about AI demand disappearing. But the repricing is real — the Nasdaq has now fallen nearly 12% from its peak in a month, and the semiconductor index is down more than 38% from its June high. Whether this is a pause in the buildout or the start of a longer reassessment depends on what Congress and the states actually do next.
Sources
- Reuters (via SRN News) — “Investors wipe $2.5 trillion off Nasdaq as blue tsunami prompts AI fears” (5 November 2026): https://srnnews.com/ai-data-center-stocks-slip-as-democratic-sweep-clouds-expansion-plans/
- Datafloq — “Nasdaq Falls 5.5% as Investors Price In a Slower AI Buildout” (6 November 2026): https://datafloq.com/nasdaq-falls-5-5-as-investors-price-in-a-slower-ai-buildout/
- NBC Palm Springs — “Stock Market Loses $2.5 Trillion as Tech Sell-Off Sends Nasdaq Into Correction” (5 November 2026): https://www.nbcpalmsprings.com/ca-us-and-world/2026/11/05/stock-market-loses-25-trillion-as-tech-sell-off-sends-nasdaq-into-correction
- KhabarWire — “Nasdaq sinks 5.5% as AI stocks slide after midterms” (6 November 2026): https://khabarwire.com/blog/nasdaq-ai-selloff-2026-11-06/
