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TL;DR
The Nasdaq Composite fell 5.52% on Nov. 5, its steepest one-day decline since April 2025, while the Nasdaq-100 dropped 6.36%. Investors focused on possible changes to AI data center approvals, power costs and tax incentives after Democrats won control of Congress and several state governorships. No new federal restrictions have passed, and the market impact of proposed state-level pauses remains uncertain.
The Nasdaq Composite fell 5.52% on Thursday, Nov. 5, its steepest one-day drop since April 2025, as investors weighed whether election results could slow or raise the cost of the AI data center build-out. The Nasdaq-100 dropped 6.36%, and Reuters put the loss in market value for those 100 companies at about $2.5 trillion. No new federal restrictions on data centers have been enacted; the policy concerns driving the selloff remain largely prospective.
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. The $2.5 trillion estimate reported by Reuters refers to market value lost by the Nasdaq-100 companies, not all stocks listed on Nasdaq. The Composite finished 11.9% below its Oct. 6 record, meeting the usual definition of a market correction: a decline of at least 10% from a recent peak.
Technology and infrastructure shares came under particular pressure. The PHLX Semiconductor index fell 12.25%; Reuters reported Nvidia declined 9% and AMD 17%, while several data center operators lost more than 14%. Amazon and Alphabet fell 2.2% and Microsoft 3.6%, Reuters reported. The VIX, a measure of expected market volatility, recorded its largest increase since December 2024, according to Reuters.
The move followed election results that shifted control of Congress to Democrats and flipped several governorships, according to the source reporting. Investors considered whether new lawmakers and state administrations might press for more scrutiny, changes to tax incentives, or requirements that developers shoulder more electricity and water costs. These are investor concerns and policy possibilities, not enacted changes. The source material says President Donald Trump retains veto power and cites analysts who expect congressional gridlock.
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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AI Build-Out Faces Policy Risk
The market reaction shows how much investor expectations for technology companies are tied to the pace and cost of building data centers. These facilities require large amounts of electricity, land, water and supporting infrastructure. If approvals take longer, incentives shrink, or developers pay more for grid connections and utilities, projects could become more expensive or be delayed. That could affect data center operators and power providers directly, as well as chipmakers and cloud companies that depend on new capacity.
That connection matters beyond the companies whose shares fell. Businesses planning to use AI services may face consequences if new computing capacity arrives more slowly or at higher cost. Communities and regulators also face choices about who pays for the power infrastructure and how projects affect local resources. Still, Thursday’s share-price moves do not establish that construction will slow or that AI demand has weakened. They reflect a repricing of uncertainty about future rules, alongside other market forces.
The scale of the decline also matters to investors and savers with exposure to technology-heavy funds. The reported $2.5 trillion figure describes an estimated change in market value for Nasdaq-100 companies during the session; it is not a measure of cash withdrawn or a forecast of future losses. Market prices can move sharply as expectations change, and the session alone does not show what the eventual policy or commercial effects will be.
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Election Results Meet Data Center Plans
The selloff was not a simple continuation of election-night trading. On Wednesday, Nov. 4, the Composite rose 1.44%. Reuters reported that some data center operators and power companies fell that day while Amazon and Microsoft each rose about 6% during the session. One explanation offered to Reuters by a strategist was that existing data centers might become more valuable if fewer new facilities were built. That interpretation did not hold through Thursday, when large technology companies and infrastructure-related shares declined together.
The source material reports that Democrats won control of both chambers of Congress and flipped five governorships: Texas, Georgia, Ohio, Iowa and Nevada. The National, citing its analysis of Cleanview project data, said those states account for 37% of planned U.S. data center capacity, with Texas representing 22.8%. Those figures describe planned capacity, not facilities already operating or projects certain to be built. The incoming governors of Texas, Georgia and Ohio were reported to have pledged pauses or a moratorium on large data center projects; the precise scope and legal authority of any such steps are not specified in the material.
The National also reported that voters in small towns across 10 states considered local data center measures. Its account counted 46 of 47 measures as opposed to projects, based on unofficial results, including bans, size limits and pauses. The numbers and status are attributed to that outlet; they do not by themselves establish a nationwide policy change. State governors can influence utility regulation and incentives, while local governments may have a role in land use and permitting. The effect varies by jurisdiction.
Thursday’s decline was the largest daily loss since April 4, 2025, when the Composite fell 5.82% amid the tariff shock. The index had also fallen 5.3% in October, according to the source’s calculation from Nasdaq data. The election was therefore a new focus for investors after a period of volatility tied to concerns about the cost of AI investment and the returns it may generate.
“The Nasdaq’s deepest one-day drop since ‘Liberation Day’ in April 2025.”
— Reuters, describing Thursday’s market move
Policy Changes Are Not Yet Settled
The election results are confirmed in the source reporting, but the policy consequences are not. No new federal law restricting data center construction or changing the cited incentives has passed. The source says analysts expect more congressional hearings and investigations, but it does not identify a specific enacted measure or timetable. With the president retaining veto power, the extent of any federal change remains uncertain.
State-level proposals also need to be distinguished from rules in force. The source reports campaign promises of pauses or a moratorium by incoming governors, but does not provide final policy texts, implementation dates, or details about which projects would be covered. The status and legal effect of local ballot measures are also not fully established; the reported tally was based on unofficial results.
A UBS estimate cited in the source says about 30% of planned 2028 capacity additions could be at risk. That is an estimate about potential exposure, not a confirmed cancellation figure or a measure of capacity already lost. The source does not give the underlying assumptions in detail. It is also unclear how much of Thursday’s market decline reflected election-related policy concerns rather than broader worries about AI spending, valuations or other market conditions.
Investors Watch Rules and Projects
Investors will look for concrete steps from the new Congress, incoming governors, utility regulators and local authorities. Hearings, proposed legislation, formal executive actions, revised tax incentives and changes to permitting or grid-connection rules would help clarify whether campaign commitments lead to binding restrictions or added costs. Until those details emerge, the market’s policy concern remains a forecast rather than a settled outcome.
For data center developers and their customers, the next useful indicators will be whether projects proceed on schedule, whether utilities revise connection arrangements, and whether local measures are adopted and implemented. The source material does not set out a single next decision date or confirmed federal policy milestone. The Nasdaq’s next sessions and forthcoming corporate disclosures may show how investors reassess the risks, but they cannot establish by themselves what rules governments will adopt.
Key Questions
How far did the Nasdaq fall on Nov. 5?
The Nasdaq Composite fell 5.52%, closing at 24,315.00, according to Nasdaq data cited in the source. The Nasdaq-100 fell 6.36% to 26,629.81.
What does the $2.5 trillion loss refer to?
Reuters estimated that about $2.5 trillion in market value was erased from the Nasdaq-100, the index of 100 large non-financial companies listed on Nasdaq. It does not refer to every Nasdaq-listed stock.
Did the election immediately change data center rules?
No new federal law had passed, according to the source material. Some incoming governors were reported to have promised pauses or a moratorium, but the scope, timing and legal effect of those proposals remain unclear.
Why did investors connect the election to AI stocks?
Data center projects depend on permits, electricity access, infrastructure and sometimes tax incentives. Investors worried that new oversight or state and local restrictions could slow construction or increase costs, but those effects have not been established.
Does the UBS estimate mean 30% of data center projects will be canceled?
No. The source describes a UBS estimate that about 30% of planned capacity additions for 2028 could be at risk. It is a forecast, not a confirmed cancellation count, and the source does not provide the estimate’s detailed assumptions.
Source: ThorstenMeyerAI.com
