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TL;DR
The Nasdaq Composite fell 5.52% on Nov. 5, its largest one-day drop since April 2025, as investors weighed whether election results could slow or raise costs for AI data center construction. The political risks are still largely forecasts: no new federal law has passed, and the cited estimate that 30% of planned 2028 capacity additions could be at risk is not a confirmed outcome.
The Nasdaq Composite fell 5.52% on Thursday, Nov. 5, closing at 24,315.00, as investors reassessed the outlook for AI data center construction after Democrats won control of Congress and several governorships. The selloff put scrutiny of permits, electricity costs and tax incentives in focus, but the policy changes investors fear have not been enacted.
Nasdaq’s published index data shows the Composite lost 1,421.51 points. It was the index’s steepest daily decline since April 4, 2025, when it fell 5.82% during a market shock tied to tariffs. The Nasdaq-100, which tracks 100 large non-financial companies listed on the exchange, fell 6.36% to 26,629.81. Reuters estimated that the decline erased about $2.5 trillion in market value from those companies; that figure is not a measure of losses across every Nasdaq-listed stock.
Technology and infrastructure shares were hit especially hard. The PHLX Semiconductor index fell 12.25%. Reuters reported that Nvidia shares dropped 9% and AMD fell 17%, while several data center operators lost more than 14%. Amazon and Alphabet each fell 2.2% on Thursday, and Microsoft declined 3.6%, according to the supplied reporting.
The Composite ended the session 11.9% below its Oct. 6 record, placing it in correction territory, commonly defined as a fall of at least 10% from a recent high. Reuters described the session as the index’s deepest one-day drop since April 2025. The market move followed election results, but a single day’s trading does not establish that anticipated policy changes caused every stock’s decline.
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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The Costs Behind AI Expansion
The reaction matters because building large data centers depends on decisions made well beyond technology companies’ boardrooms. Projects need land-use approvals, grid connections and reliable power; they may also rely on tax incentives. Changes in those conditions could affect project timelines and expenses, and, in turn, investors’ expectations for companies supplying chips, power and computing capacity.
Governors can influence state incentives and appoint utility regulators, who oversee matters such as electricity rates and grid access. Congress can hold hearings and shape federal policy, though oversight alone does not halt construction. The investment concern described in reporting is that more scrutiny, fewer incentives or developers bearing a larger share of power and water costs could make some planned projects slower or less attractive. Those are potential consequences, not confirmed changes.
The selloff also highlights a tension in the AI build-out: demand for computing may remain strong while the physical infrastructure needed to serve it faces higher costs or political resistance. That distinction matters to businesses planning capacity and communities weighing the local effects of development, as well as to investors exposed to the companies funding and supplying projects.
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Election Results Meet Project Plans
The market reaction was not a steady fall across the two days after the election. The supplied account says the Composite rose 1.44% on Wednesday, Nov. 4, even as data center operators and power companies fell. Reuters reported that Amazon and Microsoft were each up about 6% during that session. One strategist told Reuters that existing data centers could become more valuable if fewer new ones are built. On Thursday, that market interpretation shifted as technology and infrastructure shares sold off together.
The supplied reporting says Democrats won control of both chambers of Congress and flipped five governorships: Texas, Georgia, Ohio, Iowa and Nevada. The National attributed to its analysis of Cleanview project data the estimate that those states contain 37% of planned US data center capacity, including 22.8% in Texas. It reported that incoming governors in Texas, Georgia and Ohio had pledged pauses or restrictions on large data center projects. These are reported campaign commitments; their precise scope and implementation remain to be seen.
Local votes added another source of uncertainty. The source account says unofficial results showed 46 of 47 measures concerning data centers in towns across 10 states going against projects, through proposals such as bans, size limits or pauses. These local results are distinct from statewide and federal policy, and the account describes them as unofficial. They nonetheless suggest that local approval may be a practical constraint on some developments.
““deepest one-day drop since ‘Liberation Day’ in April 2025.””
— Reuters, describing Thursday’s market move
Policy Risks Are Not Policy Changes
No new federal law addressing AI data center construction is reported as having passed. The source account says President Donald Trump retains veto power and that some analysts expect congressional gridlock rather than sweeping changes. A shift in committee control could bring more hearings or investigations, but oversight is not the same as a legal restriction.
A UBS estimate cited in the source material says about 30% of planned capacity additions for 2028 could be at risk. This is an estimate, not an official decision or a count of projects already canceled. The supplied material does not specify the estimate’s full methodology or define exactly which political, permitting or infrastructure risks it includes.
It is also not yet clear how campaign pledges will translate into state rules, whether local ballot measures will take effect as proposed, or how much of Thursday’s decline reflected election concerns rather than other market factors. The market data confirms the scale of the drop; it does not by itself prove that anticipated data center regulation was its sole cause.
Permits, Pledges and Market Signals
The next indicators will be policy actions rather than election-night promises: committee priorities in the new Congress, state-level decisions on permits and incentives, and utility regulators’ treatment of power prices and grid connections. Any formal pauses or rule changes in states where projects are planned would help clarify whether the concerns raised by investors are becoming actual constraints.
Local measures described as unofficial will also need to be confirmed and followed through the applicable approval process. For developers and communities, the practical questions include which projects are affected, how long any pause would last, and who would bear the costs of new electricity and water infrastructure. Until those details emerge, the 30% capacity-risk figure remains a forecast, not a verified reduction in planned construction.
Investors will continue to receive information through company disclosures and market trading, but further price moves alone cannot settle the policy questions. The key development to watch is whether election results lead to specific decisions that alter project costs, timelines or approvals.
Key Questions
How much did the Nasdaq fall on Nov. 5?
The Nasdaq Composite fell 5.52%, or 1,421.51 points, to close at 24,315.00. The Nasdaq-100 fell 6.36%.
Does the $2.5 trillion figure cover every Nasdaq-listed company?
No. Reuters’ estimate refers to market value lost by companies in the Nasdaq-100, the index of 100 large non-financial companies listed on the exchange. It is not a figure for every Nasdaq stock.
Have new rules restricting AI data centers been passed?
The supplied reporting says no new federal law has passed. Election results and campaign pledges could lead to additional scrutiny or state action, but the specific policy outcomes remain uncertain.
What does the estimate that 30% of 2028 capacity could be at risk mean?
It is a UBS estimate cited in the source material about planned capacity additions for 2028. It is not a count of canceled projects or a confirmed policy outcome, and the supplied account does not give the estimate’s full methodology.
Source: ThorstenMeyerAI.com
