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TL;DR
The Nasdaq Composite fell 5.52% on Nov. 5, while the Nasdaq-100 dropped 6.36%, amid investor concern that election results could raise costs or slow approvals for AI data centers. The selloff is confirmed; the scale of any policy changes remains uncertain, and no new federal law has passed.
Nasdaq stocks plunged on Nov. 5 as investors reacted to US midterm results and reconsidered the political risks facing the AI data center building boom. The Nasdaq Composite fell 5.52% and the Nasdaq-100 dropped 6.36%; Reuters estimated the latter decline wiped about $2.5 trillion from the index’s market value. The election results are confirmed, but the prospect of tougher oversight, fewer incentives or construction pauses remains a risk scenario rather than an enacted policy change.
Nasdaq’s published closing data put the Composite at 24,315.00, down 1,421.51 points. The Nasdaq-100 closed at 26,629.81, down 1,807.36 points. Reuters described the Composite’s fall as its deepest one-day decline since April 2025’s tariff shock. The Composite ended 11.9% below its Oct. 6 record, meeting the commonly used definition of a market correction: a decline of at least 10% from a recent peak.
The losses were concentrated in areas closely tied to AI infrastructure. The PHLX Semiconductor Index fell 12.25%; Reuters reported Nvidia shares fell 9% and AMD shares 17%, while several data center operators lost more than 14%. Amazon and Alphabet fell 2.2% and Microsoft 3.6%, according to Reuters. These are single-session market moves, not evidence by themselves that demand for AI or data centers has fallen.
Investors were weighing whether political changes could make new data center facilities slower or more expensive to build. The source account, citing Reuters and The National, reports that Democrats won control of both chambers of Congress and flipped several governorships. Potential areas of impact include hearings and investigations, state utility decisions, local permitting and tax incentives. The market reaction reflects expectations about those possibilities; it does not establish that projects have been canceled or that rules have changed.
Infographic 01 · The day in numbers
The Nasdaq's worst day in 19 months
Chips and data center builders led the fall. The dollar figure in the headlines belongs to the Nasdaq-100, the 100 largest non-financial companies on the exchange.
Nasdaq Composite on Thursday, 5 November 2026: down 1,421.51 points to 24,315.00. The biggest one-day fall since 4 April 2025, 19 months earlier.
The five worst Composite days since March 2025
Daily change, closing values
Sources: Nasdaq Global Indexes (COMP, NDX, SOX closing data, retrieved 6 Nov 2026) · Reuters, 5 Nov 2026 (via The Straits Times). History checked back to 25 Mar 2025. Market value is Reuters’ calculation. Not investment advice.
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How Policy Could Raise Data Center Costs
AI data centers require large amounts of electricity, land, water and grid access, making their economics sensitive to local approvals and infrastructure costs. Governors can influence the policy environment through appointments to utility regulators and decisions on state incentives, while local authorities can affect siting and permits. If developers must cover more power or water costs, or face longer approval timelines, planned projects could become less attractive or take longer to complete.
That matters beyond the companies that own data centers. Hyperscalers, chipmakers, utilities, construction firms and suppliers all have exposure to the pace and cost of infrastructure investment. A repricing of those risks can move shares across the technology supply chain, as the Nov. 5 declines showed. But a market selloff is not a direct measure of future construction: prices also reflect changing expectations, positioning and broader uncertainty.
The source material cites a UBS estimate that about 30% of planned 2028 capacity additions could be at risk. That is an analyst estimate, not a government decision or confirmed count of canceled capacity. The underlying assumptions and the specific projects included are not detailed here, so the figure should be treated as a forecast rather than an established outcome.
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From Election Results to Market Losses
The sharp decline followed a mixed session on Nov. 4. The Composite rose 1.44% that day, even as Reuters reported declines among data center operators and power companies. Some investors had reasoned that existing facilities might benefit if fewer new ones were built. On Nov. 5, that interpretation gave way to broader selling that also hit major technology companies and chip stocks.
The Nasdaq’s loss was not isolated from a longer period of volatility. The source’s review of index data says the Composite had already fallen 5.3% in October and had recorded four daily losses of more than 500 points since mid-October before the Nov. 5 drop. The latest fall was its largest since April 2025, when markets were shaken by tariff announcements. The index data also show that the Semiconductor Index fell more sharply than the broader Composite on Nov. 5.
Election-related concerns include reported commitments by incoming governors in some states to pause or restrict large data center projects, alongside local ballot measures opposing facilities. Those reports point to possible state and community-level constraints, but they do not establish the status of every proposal. Political control can shape oversight and permitting; it does not automatically halt projects already underway or settle how regulators will act.
“The Nasdaq’s “deepest one-day drop since ‘Liberation Day’ in April 2025.””
— Reuters, describing the Nov. 5 market session
Policy Changes Remain Unsettled
No new federal law has passed that changes data center construction rules, according to the source material. The extent to which a Congress controlled by Democrats will pursue additional hearings or legislation is not settled. The president retains veto power, and analysts cited in the source expect gridlock rather than sweeping federal change.
State and local actions may matter more directly to individual projects, but their scope and timing are still unclear. The account reports proposed pauses and opposition in some jurisdictions; it does not provide a complete project-by-project assessment of which facilities have permits, financing or construction schedules at risk. The reported count of local ballot measures is based on unofficial results, and the source does not establish how each result will translate into binding policy.
It is also unclear how much of the stock decline reflected election-related concerns rather than other market factors. The session’s price movements show what investors did, not a definitive breakdown of why each security fell. The $2.5 trillion figure refers to the Nasdaq-100, not every company listed on Nasdaq, and should not be generalized to the entire exchange.
Permits, Utility Decisions and Oversight
Investors and project developers will be watching for concrete steps after incoming officials take office: legislative hearings, state-level proposals, utility commission decisions, permit reviews and changes to tax incentives. Those decisions will help show whether campaign commitments lead to binding restrictions or remain political signals.
For markets, subsequent company disclosures may clarify whether developers are changing investment plans, timelines or expected project costs. Until such evidence emerges, the reported election results and the Nov. 5 market decline are confirmed, while the size of any effect on future data center capacity remains a matter of forecast. The next meaningful test is whether policy proposals become specific rules that affect projects.
Key Questions
What happened to Nasdaq on Nov. 5?
The Nasdaq Composite fell 5.52% to 24,315.00, and the Nasdaq-100 fell 6.36% to 26,629.81, according to Nasdaq’s published closing data.
What does the $2.5 trillion figure cover?
Reuters attributed roughly $2.5 trillion in lost market value to the Nasdaq-100, which tracks 100 large non-financial companies on Nasdaq. It is not a figure for every Nasdaq-listed stock.
Have governments stopped AI data center projects?
The source material reports election outcomes, proposals and local opposition, but does not establish a general halt to construction. No new federal law changing data center rules had passed at the time described.
Is the UBS estimate that 30% of 2028 additions are at risk confirmed?
No. It is an analyst estimate cited in the source material, not a confirmed count of canceled projects. Its assumptions and project-level effects are not fully specified there.
Source: ThorstenMeyerAI.com
