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TL;DR
On Nov. 5, the Nasdaq Composite fell 5.52% and the Nasdaq-100 fell 6.36%; Reuters put the Nasdaq-100 companies’ lost market value at about $2.5 trillion. Investors were concerned that election results could bring more oversight and make AI data center construction slower or more expensive, but no new federal law has passed and the effect on projects remains uncertain.
The Nasdaq Composite fell 5.52% on Thursday, Nov. 5, while the Nasdaq-100 dropped 6.36%, in a selloff Reuters said erased about $2.5 trillion in market value from the 100 largest non-financial companies listed on Nasdaq. Investors were weighing whether election results could bring more scrutiny, fewer incentives or higher costs for the planned AI data center build-out; those policy changes have not been enacted.
Nasdaq’s published closing data puts the Composite at 24,315.00, down 1,421.51 points, and the Nasdaq-100 at 26,629.81, down 1,807.36 points. The $2.5 trillion figure applies to the Nasdaq-100, not to every company traded on Nasdaq. Reuters characterized Thursday as the indexes’ sharpest daily declines since the April 2025 tariff shock.
The selloff was especially pronounced in chip stocks. The PHLX Semiconductor index fell 12.25%. Reuters reported that Nvidia lost 9% and AMD 17%, while several data center operators fell by more than 14%. Amazon and Alphabet dropped 2.2% each, and Microsoft fell 3.6%, according to the source material. The Nasdaq Composite ended 11.9% below its Oct. 6 record, putting it in correction territory, commonly defined as a decline of at least 10% from a recent peak.
The concern was about the conditions for future construction, rather than a reported collapse in demand for AI. Investors were considering whether new political leadership could increase oversight, reduce tax incentives or shift more electricity and water costs to developers. These are possible policy outcomes and market interpretations, not changes already in force.
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 Data Center Costs Could Shift
The market reaction matters because AI companies’ plans depend on building and powering large data centers. If projects face longer approval processes, fewer tax breaks or higher utility costs, their timelines and economics could change. That could affect developers and power suppliers directly, while also influencing expectations for chipmakers and the technology companies investing in AI infrastructure.
The selloff shows that investors are treating political and local approval risks as part of the AI investment outlook. It does not establish that construction will stop or that companies will cut spending. A UBS estimate cited in the source material suggests about 30% of planned 2028 capacity additions could be at risk; that is a forecast, not a confirmed cancellation rate. The broader financial consequence will depend on policies and project decisions that are still to come.
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Election Results Meet AI Build-Out
The source material links the market concern to election results that could affect oversight and project approvals. It reports that Democrats won control of both chambers of Congress and that several governorships changed party. Those developments could alter committee oversight and state-level decisions on utilities, permits and incentives, but the effects depend on future actions by lawmakers and officials.
The National reported that incoming governors in Texas, Georgia and Ohio had pledged pauses or limits on large data center projects; it also reported a Texas pledge for a moratorium. The publication’s analysis of Cleanview project data said the states it examined account for a substantial share of planned capacity. These are reported campaign commitments and estimates, not evidence that existing permits have been withdrawn or projects halted. Local measures also featured in the source: unofficial results showed 46 of 47 measures across ten states opposing data centers through proposals such as bans, caps or pauses. Their legal status and implementation are not specified.
The market’s response was not a simple continuation of election-night trading. The source says the Composite rose 1.44% on Wednesday, Nov. 4, while data center operators and power companies fell and Amazon and Microsoft rose about 6% during the session. On Thursday, that pattern reversed as the broader technology selloff intensified. The sequence suggests shifting investor expectations, but does not by itself show which policy concern drove each stock move.
“The Nasdaq’s “deepest one-day drop since ‘Liberation Day’ in April 2025.””
— Reuters
Policy Risks Are Not Policy Changes
It is not yet clear whether election results will lead to new federal or state rules that materially slow data center projects. No new federal law has passed, and the source material notes that the president retains veto authority. Analysts cited there expect congressional gridlock to remain possible, which could limit broad changes.
The extent of any project delays, cost increases or cancellations is also unknown. Campaign pledges, unofficial local ballot results and analyst estimates do not establish what regulators, legislatures or companies will ultimately do. Nor does one volatile trading session show that demand for AI infrastructure has weakened. The $2.5 trillion figure measures a change in market value, not cash withdrawn from companies or a direct estimate of losses to data center projects.
Permits, Power Rules and Project Plans
The next indicators will be concrete actions by incoming governors, state utility regulators, local governments and congressional committees. Watch for proposals or decisions affecting permits, grid connections, electricity pricing, water use and tax incentives, as well as whether pledged pauses become formal policy. Hearings or investigations could clarify lawmakers’ priorities without necessarily changing project rules.
Investors and businesses will also be watching company disclosures on capital spending, construction schedules and power contracts. Until those decisions and policy details emerge, the market’s concern remains a risk scenario rather than a confirmed change to the AI build-out. The next reported trading sessions may show whether Thursday’s drop was a short-lived reaction or part of a broader reassessment, but they cannot settle the policy question on their own.
Key Questions
What does the $2.5 trillion loss refer to?
Reuters attributed about $2.5 trillion in lost market value to the Nasdaq-100’s Nov. 5 decline. The figure covers the index’s 100 largest non-financial companies, not all Nasdaq-listed stocks.
Why did investors connect the selloff to AI data centers?
Investors were concerned election results could lead to more oversight, fewer incentives or higher power and water costs for projects. Those are possible effects under discussion, not policy changes already enacted.
Were data center projects halted after the election?
The source material reports campaign pledges and local ballot measures, but does not establish that projects were broadly halted or that existing permits were withdrawn. The status and effect of individual proposals remain unclear.
Does the market decline prove AI demand is falling?
No. The reported selloff reflects stock prices and investor concerns, including possible construction and policy risks. The source material does not report a confirmed collapse in AI demand.
What happens next for the data center build-out?
State and local decisions on permits, utilities, incentives and project pauses will help show whether election-related concerns become actual constraints. Company updates on spending and construction schedules will also matter.
Source: ThorstenMeyerAI.com
