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TL;DR
The Nasdaq Composite fell 5.52% on Nov. 5, its steepest daily decline since April 2025, while semiconductor shares dropped even more. Reports linked the selloff to investor concerns that election results could bring more oversight and higher costs for AI data centers, but no new federal restrictions have been enacted.
The Nasdaq Composite fell 5.52% on Thursday, Nov. 5, its largest one-day decline since April 2025, as investors weighed whether election results could make US AI data center projects slower or more expensive. The Nasdaq-100 dropped 6.36%, and Reuters estimated that the decline erased about $2.5 trillion in market value from its constituent companies.
Nasdaq’s closing data put the Composite at 24,315.00 points, down 1,421.51 points. The Nasdaq-100 closed at 26,629.81, down 1,807.36 points. The exchange data cited in the source shows the Composite finished 11.9% below its Oct. 6 record, placing it in correction territory, defined as a fall of at least 10% from a recent peak.
The sharpest losses were concentrated in chipmakers and other companies tied to data center construction. The PHLX Semiconductor index fell 12.25%. Reuters reported Nvidia shares down 9% and AMD down 17%, while several data center operators fell more than 14%. Amazon and Alphabet each dropped 2.2%, and Microsoft fell 3.6%, according to the source’s account of Reuters reporting.
The political link is an investor concern, not an enacted policy change. The source says Democrats won control of both chambers of Congress and several governorships in states with major planned data center capacity. Investors are considering whether oversight, permitting, power costs or tax incentives could change. No new federal law restricting data centers had passed as of the report.
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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Policy Risk Meets AI Infrastructure Spending
Data centers require large investments in buildings, chips, electricity and grid connections. If projects take longer to approve or become more expensive to power, developers could delay construction or revise spending plans. That possibility matters to investors because companies supplying chips, equipment, power and cloud services are valued partly on expectations for continued AI infrastructure growth.
The selloff shows that markets can react to possible changes in project economics before governments adopt new rules. It does not establish that AI demand has fallen or that planned facilities will be cancelled. The immediate concern, as described in the reporting, is uncertainty about costs and approvals. Investors and businesses with exposure to data center projects will be watching whether election promises become formal proposals and whether local decisions affect construction schedules.
The reported $2.5 trillion figure refers to the Nasdaq-100, not every stock listed on Nasdaq. That distinction matters when describing the scale of the market decline: it is an estimate of lost market value across the index’s companies, not a measure of cash withdrawn from the exchange or losses in every Nasdaq-listed stock.
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Election Results Put Permits in Focus
The market reaction followed a volatile stretch for technology shares. On Wednesday, Nov. 4, the Composite rose 1.44%, even as Reuters reported declines among some data center operators and power companies. Some investors had suggested that limits on new construction might benefit existing facilities. That interpretation gave way to broader selling the next day, when chipmakers and large technology companies also fell.
According to the source’s summary of Reuters reporting, Democrats won both chambers of Congress. Analysts expect the shift to bring more hearings and investigations into the AI build-out, though oversight does not itself stop projects. The National reported that Democrats also flipped five governorships—Texas, Georgia, Ohio, Iowa and Nevada—and that those states account for a substantial share of planned US data center capacity in its analysis of Cleanview project data.
State and local decisions can affect projects through permitting, utility regulation, grid connections and tax incentives. The National reported promises by incoming governors in Texas, Georgia and Ohio to pause or review large data center developments. The source also reports unofficial results showing 46 of 47 local measures on data centers going against projects. These reports describe political signals and votes; their final legal effects and implementation are not established in the supplied material.
“Existing data centers become more valuable if fewer new ones get built.”
— Reuters, quoting a market strategist
Election Promises Are Not New Rules
It remains unclear which campaign pledges will become legislation, regulations or binding local decisions. The source says no new federal law had passed and notes that President Donald Trump retains veto power. Analysts cited in the report expect political gridlock could limit sweeping federal changes, but that is a forecast rather than a settled outcome.
A UBS estimate cited in the source says about 30% of planned 2028 capacity additions could be at risk. This is an analyst estimate, not a count of cancelled projects or an official government determination. The source does not provide enough detail to establish how individual state proposals, local ballot measures or utility decisions would affect particular sites or timelines.
It is also not yet clear whether the market decline reflects a lasting reassessment of AI infrastructure spending or a short-term response to political uncertainty. The supplied material documents the closing moves and reported election concerns, but does not establish a direct, quantified cause for each stock’s decline.
Watch for State and Federal Actions
The next indicators are whether congressional committees schedule hearings or investigations, and whether incoming governors or state legislatures put data center pauses, permitting changes or incentive reviews into formal proposals. Utility regulators’ decisions on grid connections and electricity costs may also affect projects, although the timing and scope of any changes are not specified in the source.
Investors will also look for updates from data center developers and major technology companies on construction schedules, power arrangements and capital spending. Until specific rules or project changes are announced, the election-related concerns remain potential risks rather than confirmed restrictions. The source provides no date for a next policy decision or market milestone.
Key Questions
How much did the Nasdaq fall on Nov. 5?
The Nasdaq Composite fell 5.52% to 24,315.00. The Nasdaq-100 fell 6.36% to 26,629.81.
What does the reported $2.5 trillion loss refer to?
Reuters’ estimate refers to market value erased from companies in the Nasdaq-100. It does not describe every stock listed on Nasdaq.
Did the election results immediately impose new data center rules?
No new federal law had passed according to the source. Reported campaign pledges and election outcomes could lead to further debate or policy action, but they are not the same as enacted restrictions.
Why were chip and data center stocks hit especially hard?
Investors were concerned that more oversight, permitting delays, reduced incentives or higher power costs could slow or raise the cost of AI infrastructure projects. The source reports steep losses in semiconductor and data center-related shares, but does not prove a single cause for every stock move.
What is the estimate that 30% of capacity could be at risk?
It is a UBS estimate, cited in the source, that about 30% of planned 2028 capacity additions could be at risk. It is not an official decision or confirmation that those projects have been cancelled.
Source: ThorstenMeyerAI.com
