On Thursday, November 5, 2026, the Nasdaq fell 5.5%, its steepest decline since April 2025, according to CNBC. Nvidia dropped more than 9%, losing almost $450 billion in market value, and AMD, Micron and Applied Materials each fell by double digits. The decline came a day after a post-election rally, and several unrelated catalysts landed at once. That makes it a useful case study in how markets attribute a move, and in how much of the attribution can actually be tested.
NvidiaThe day in numbers
Closing figures differ slightly between market-data outlets. The values below come from ChartMill, Quantisnow and CNBC, and should be read as approximate.
Reported closing moves, Thursday November 5, 2026
Percentage change on the day. Bar length is the size of the decline.
Sources: ChartMill, Quantisnow and CNBC, November 5, 2026. Figures are from market-data close summaries and differ slightly between outlets.
Beyond the headline names, CNBC reports that Alphabet, Amazon, Meta and Microsoft each fell between 2% and 4%, while Tesla and SpaceX each dropped more than 9%. The breadth matters: a decline confined to Qualcomm would point to company news, whereas a decline that reaches memory, equipment, infrastructure and hyperscaler stocks points to a shared driver.
Four catalysts, tested one at a time
| Catalyst | What was reported | How much it can explain |
|---|---|---|
| Qualcomm guidance | Beat on earnings but guided below expectations; CEO Cristiano Amon said "we don't have a demand issue; it's a supply issue" | Explains Qualcomm, and by extension handset-exposed chips, but not Nvidia or equipment makers |
| Arm outlook | About $1.54 billion in expected quarterly revenue, in line with the average estimate but below some analysts' near $1.7 billion (StockAnalysis, intraday) | Explains Arm; modest read-through to licensing-exposed names |
| Memory costs and Micron | Higher memory costs cut handset chip sales; Micron halted work on a $4.5 billion Taiwan plant over a labor dispute (StockAnalysis, intraday) | Explains memory and handset exposure; relevant to AI server costs |
| Data center politics | UBS: "Data center pauses will slow the pace of buildout into 2028," with about 30% of planned 2028 capacity at risk | The only catalyst that links directly to AI infrastructure demand |
The Qualcomm, Arm and Micron items are company-specific or supply-side. Only the data center item reaches Nvidia, AMD, Dell, CoreWeave and Nebius together. CNBC links the broader decline to this week's midterm results and fears that the AI build-out will slow, alongside rising interest rates and debt concerns. Our companion post on the November 3 ballot results covers what voters actually decided.
A selloff with four catalysts has four plausible stories, and the data can rarely rank them.
Our analysis
What the size of the move implies
Using CNBC's two figures, a decline of more than 9% that removed almost $450 billion implies Nvidia was worth somewhere near $4.9 trillion before the session. That is our arithmetic on rounded reported numbers, not a reported valuation.
The scale of the decline also helps separate two readings:
- A demand reading. If investors believe fewer data centers will be built, the revenue expected by Nvidia, memory makers and equipment suppliers shifts lower in later years.
- A sentiment reading. If investors were already positioned for continued growth, any combination of negative headlines can trigger forced selling, independent of a specific change in forecasts.
Amon's comment points toward a third factor, supply. CNBC reports that chipmakers face a global memory shortage that is raising prices and making components harder to get, which can cap revenue even when demand is strong. A supply limit is a different risk from a demand limit, and it affects how investors read both.
What to watch next
- Nvidia's earnings. AI Weekly reports that Nvidia's third-quarter results fall one day before a November 18 congressional briefing request, which implies November 17. They will show whether customers' spending plans changed.
- Permitting and utility decisions. UBS's 2028 estimate depends on how many pauses become lasting limits.
- Memory supply. If shortages ease, the handset and server-cost effects fade; if they persist, they remain a drag independent of politics.
- Financing. Reporting this week that OpenAI raised about $11 billion of a round that could reach about $20 billion at a $1.25 trillion valuation, below its original goal, shows that capital is available but priced more carefully (see our earlier analysis).
A single session cannot settle which catalyst dominated. The most defensible position is that several risks became visible together, and that each should be tracked separately. Anyone using AI tools in their work can reduce exposure to any one supplier's capacity or pricing by keeping access to several models, which multi-model platforms such as Metir are designed for.
Sources:
- CNBC, "AI meltdown: Nvidia and Qualcomm drop more than 9%, pushing Nasdaq to worst day since April 2025" (November 5, 2026): https://www.cnbc.com/2026/11/05/qualcomm-earnings-chip-stocks-election.html
- StockAnalysis, "Nasdaq 100 falls over 4% as chip stocks drop a day after the midterm rally" (November 5, 2026, intraday): https://stockanalysis.com/news/nasdaq-100-falls-chip-stocks-slide/
- ChartMill, "Stock Market Today: Nasdaq Crashes 5.5% as Midterm Fallout Turns Into a Brutal AI Chip Selloff" (November 5, 2026): https://www.chartmill.com/news/COP/Chartmill-58193-stock-market-today-nasdaq-crash-ai-chip-selloff-midterms-amd-micron-airbnb-2026-11-05
- Quantisnow, "Chip stocks have their worst day since 2020 as the postelection rally reverses": https://www.quantisnow.com/articles/chip-rout-sends-smh-down-11-5-and-qqq-down-6-3-while-equal-weight-s-p-500-loses-only-2-9
- TechCrunch, "OpenAI reportedly raises an additional $11 billion at a $1.25 trillion valuation" (November 6, 2026): https://techcrunch.com/2026/11/06/openai-reportedly-raises-an-additional-11-billion-at-a-1-25-trillion-valuation/
- AI Weekly, AI news roundup (November 5 to 9, 2026), for the timing of Nvidia's earnings: https://aiweekly.co/ai-news-today
Image credits
- Hero and in-body photo: "Nasdaq MarketSite (51494550508).jpg" by ajay_suresh, Wikimedia Commons, licensed CC BY 2.0 (https://commons.wikimedia.org/wiki/File:Nasdaq_MarketSite_(51494550508).jpg).