Correction, 6 Nov 2026: an earlier version used Nasdaq’s last-sale price of $182.29 (−8.91%) for Nvidia; the official close was $181.60 (−9.26%). Every close in the 12-stock basket now uses Nasdaq’s official closing prices, and the basket total has been updated from $1,436.8 billion to $1,447.4 billion (11.1% of its value). Nvidia’s fall is still its worst daily close since 27 January 2025.
The sell-off in AI stocks was the biggest story of 5 November 2026, by our reading of the news. The 12 AI stocks we tracked closed a combined $1,447.4 billion lower than on Wednesday, by our arithmetic from Nasdaq’s official closes and the share counts in each company’s latest SEC filing, and Nvidia closed at $181.60, down 9.26%, its worst one-day fall since 27 January 2025 on Nasdaq’s daily closes.
As we read it, the rest of the day’s coverage ran on the build-out behind those stocks: who rents data center capacity, where it can be built after the vote, and how Anthropic and OpenAI stand before their listings. The threads are the sell-off; Microsoft and the neoclouds; data centers after the vote; Anthropic and OpenAI; chips and memory; products and models; and later items. Each item links to the full piece, which names its sources.
Business Pill · FINANCIAL CONDITIONS
An evergreen Business Engineer explainer on how financial conditions shape what companies can raise. It teaches the general idea only and does not discuss the sell-off or the companies in this roundup.
AI Daily Briefing · video
Today’s stories in about a minute (5 Nov 2026).
The key insight: As we read it, the day’s coverage put the AI sell-off next to the build-out behind it: 12 AI stocks closed $1,447.4 billion lower, by our arithmetic, while Bloomberg reported that Microsoft is tightening oversight of neocloud projects and SpaceX’s 5-year default swaps reached 286.56, according to Markit data cited on X. We do not say one caused the other.
The 12 AI stocks we tracked through Thursday’s sell-off closed a combined $1,447.4 billion lower than on Wednesday, by our arithmetic from Nasdaq’s official 4:00 p.m. ET closes and the share counts in each company’s latest SEC filing, about 11.1% of the basket’s value. Nvidia closed at $181.60, down 9.26%, its worst one-day fall since 27 January 2025 on Nasdaq’s daily closes, and about $446.6 billion of market value.
The loss deepened through the day: on the same stocks and share counts we counted about $930.1 billion at 10:04 a.m. ET and $1,087.0 billion at 11:44 a.m. ET. The Nasdaq Composite fell 5.52% to close at 24,315.00, CNBC reported. Read: the $1.45 trillion close, the morning count and Apple passing Nvidia the evening before.
In Seoul, Samsung Electronics and SK hynix ended 5 November about $144 billion lower in combined market value, by our arithmetic on Korea Exchange closing prices, and the KOSPI closed down 5.3% at 5,383.80; Yonhap reported that the Democratic Party’s landslide in the US midterm elections “sparked concerns over tighter regulations on artificial intelligence (AI) investments”. European stocks rose above their previous closing record in what Bloomberg described as an outperformance “driven by a rotation out of the artificial intelligence trade and a strong earnings season.” Read: Samsung and SK hynix and Europe’s record.
SpaceX’s 5-year credit default swaps widened 24.5 basis points to 286.56, according to Markit data cited by Walter Bloomberg on X; by our arithmetic that is about 9.3% in a day, and protecting $10 million of SpaceX debt for a year now costs about $286,560. Read: the SpaceX default-swap record.
Market value lost by 12 AI stocks from the 4 November close to the 5 November 2026 close: Nvidia about $446.6 billion, TSMC (ADR) about $221.2 billion, Tesla about $164.0 billion, Broadcom about $162.1 billion, Micron about $157.1 billion and AMD about $138.4 billion, part of a $1,447.4 billion total for the 12, by our arithmetic from Nasdaq official closes and SEC share counts.
Microsoft and the Neoclouds
Microsoft is tightening oversight of some data center projects from the neocloud providers Nebius, IREN and Nscale, Bloomberg News reported, citing people familiar with the matter, as summarised by Reuters; the three have put a value on their Microsoft contracts in SEC filings of up to $70.9 billion together, by our arithmetic. Microsoft has also rejected an option to more than double its existing contract with Nscale in Texas, the Financial Times reported. Read: Microsoft’s oversight and the Nscale option.
The Information reported that IREN is one of the third parties whose late capacity left Microsoft spending about $5 billion less on capital expenditures in the quarter than it had planned, about 11% of the $45.2 billion Microsoft said it spent, by our arithmetic. In the same quarter Microsoft took on $6.5 billion of new operating-lease assets, according to its Form 10-Q, 4.6 times the year-earlier figure, by our arithmetic. Read: the $5 billion shortfall and Microsoft’s leases.
A CoreWeave spokesperson said, “We do not currently anticipate any impact to CoreWeave’s existing customer commitments or associated backlog as a result of shifts in the political landscape”; CoreWeave’s own figures leave about 2.7 GW, or about 64% of contracted power, not yet active, by our arithmetic. Core Scientific added a risk factor on data center moratoriums to its 10-Q, which says CoreWeave represented approximately 84% of its revenue for the nine months.
Bloomberg reported that the Bank of England “has queried market participants about data center projects that are being financed without a tenant in place to pay rent.” Read: CoreWeave’s backlog, Core Scientific and the Bank of England.
Data Centers After the Vote
A Goldman Sachs trading-desk note by Rich Privorotsky, as summarized by BigGo Finance, argued that corporate decision-makers “may instead pull capital deployment forward into 2027, rushing to take advantage of current approval conditions”; Goldman’s map puts about 45% of planned US capacity in states likely to tighten rules, investingLive reported, and by our arithmetic Texas is about 56% of that. Senior OpenAI leaders discussed whether the results meant resetting expectations for next year’s data center capacity, the Wall Street Journal reported, citing a person familiar. Read: Goldman’s pull-forward and OpenAI’s capacity talks.
OpenAI “reaffirmed its promise to pay the full cost of powering data centers” it owns and operates, CNBC reported, and Google said it is building a $17 billion data center in Wyoming and that “We will pay for 100% of the power we use”. Meta President Dina Powell McCormick said a governor-elect who made data centers a big part of their campaign has asked Meta to meet after the inauguration, as quoted by the Washington Examiner. Read: OpenAI’s pledge, Google in Wyoming and Meta and the governor-elect.
SpaceX hosted a town hall in Cochise County, Arizona, on a proposed campus with an estimated demand of 6 gigawatts, according to 13 News and the applicant’s notice. Sunbury, Ohio, voters passed a charter amendment barring data centers above 25 megawatts by 78.64% to 21.36% on the unofficial canvass, where Amazon Web Services had proposed a $2 billion campus. One Kyber rack, which Nvidia CEO Jensen Huang said will draw about 600 kW, needs the power of 75 of the 8 kW racks Uptime Institute found on average, by our arithmetic. Read: SpaceX in Arizona, Sunbury and rack density.
Anthropic and OpenAI Before Their Listings
Anthropic’s amended Form S-1 shows $131.9 billion of cash and short-term investments against approximately $69.8 billion of contractual obligations due in the next 12 months, about 1.9 times by our arithmetic, and a payments table that peaks at $47.8 billion in 2029. The filing says: “Certain of our competitors have directly solicited, and continue to directly solicit, our employees.” Read: Anthropic’s cash cover, the obligations table and the staff solicitation.
Traders on Polymarket cut the price of an Anthropic IPO before the end of 2026 to 77.1% at 16:52 UTC, from 90.1% at 15:00 UTC, according to Polymarket’s public price data, and two Hyperliquid perpetuals that reference one Anthropic share traded about 13% to 13.5% above Bitget’s $103 estimate, by our arithmetic. Greg Brockman said OpenAI has signed a JPMorgan Chase partnership that “has not been previously announced” and put OpenAI at “majority enterprise”. Read: the IPO odds, the perpetuals and Brockman’s JPMorgan deal.
Four people posted on X between 24 October and 5 November that they had left Anthropic, and two of them, Cat Wu and Austin Lau, have since posted that they joined OpenAI; OpenAI confirmed Wu’s hire to Business Insider. Anthropic and the Associated Press struck a licensing deal, Adweek reported, the first time Anthropic has paid a digital news publisher to license its content. Read: the staff tracker, Wu’s hire and the AP deal.
Chips and Memory
Global DRAM revenue grew 369% year on year in the third quarter to nearly $200 billion, Counterpoint Research said, and TrendForce projects the blended average selling price of HBM will rise 121% year on year in 2027. Broadcom shipped TPU computing power equal to about 1.97 million Nvidia H100 GPUs in its fiscal third quarter, roughly double the quarter before, according to Epoch AI’s modelled estimates. Read: DRAM revenue, HBM prices and Broadcom’s TPUs.
About 600,000 Nvidia AI chips are stored in Hong Kong waiting for shipment to mainland China, Reuters reported, citing people familiar with the matter, and Moonshot AI has sought access to Nvidia’s Blackwell chips through data centres in Europe, CNBC reported. ABB confirmed that China “has prohibited the acquisition of the ABB Robotics business in China”, the China part of SoftBank Group’s $5.375 billion deal.
Anthropic announced Personal Finance in Claude, a US beta that connects bank and card accounts through Plaid with read-only access, on the Pro, Max and Ultra plans. Perplexity launched teammates for Max subscribers, the plan it lists at $167 a month billed annually. Read: Claude Personal Finance and Perplexity’s teammates.
OpenAI introduced GPT-6 Cyber, which it says scores 48.5% on ExploitGym, up from 32.1% for GPT-5.6 Cyber, and classifies as “Critical in cybersecurity under our Preparedness Framework”. In a separate report, OpenAI said GPT-6 Astra completed “about 10 percent of hidden rubric items under the safety framing, compared with about 16 percent under the capabilities framing”. Google cut the price of Gemini Omni video by 30% to $0.07 per second for 720p. Read: GPT-6 Cyber, Astra’s safety gap and Gemini Omni.
Planet Labs made its Planet AI app generally available, with “Right now, access is free!” in its launch post; photos of a slide by Z.ai chief scientist Jie Tang show GLM’s data led by 1 trillion web pages and 500 million code repositories; and Edward Witten names Claude Opus 5.5 three times in a new physics paper. About one in four employed US adults, 26%, used a paid AI service for their job in the past week, Epoch AI said. Read: Planet AI, GLM’s data, Witten’s paper and the Epoch poll.
Later on 5 November
METR, an independent AI evaluation group, says Anthropic is “likely improving the capabilities of their models on well-specified tasks at around twice the rate they did between March 2024 and October 2025”, and gives it “with high uncertainty”; METR guesses that “a majority (perhaps โ80%) of the current (October 2026) acceleration is due to AI”. Anthropic co-founder Sam McCandlish wrote on X: “We redacted a lot, and I accept that this makes it harder for others to check METR’s work”. Read: METR’s assessment.
Three Republican House committee chairmen have asked Nvidia chief executive Jensen Huang to appear for a joint, closed-door briefing on 18 November 2026, about his interactions with Megaspeed executive Alice Huang, whom the letter calls “a publicly reported People’s Republic of China (PRC) intelligence asset”. Nvidia is scheduled to report third-quarter earnings on 17 November, CNBC reported, the day before the requested briefing. Read: the House letter.
IREN’s quarterly report on Form 10-Q, filed on Thursday, said: “At Microsoft’s request, we are implementing a networkdesign change across the Horizon deployments”, and its results release moves its more than $4 billion annualised revenue target from year-end 2026 to January 2027, saying it “may extend to February 2027”. AI cloud made up $200 million of $228 million in quarterly revenue, about 88%, by our arithmetic. Read: IREN’s results.
Atlassian raised its fiscal 2027 outlook for Subscription ARR, revenue, Cloud and Data Center, then its shares fell about 18% in after-hours trading; its results release reported first-quarter revenue of $1,772 million, up 24%. The shareholder letter says: “Agents aren’t replacing our platform. They’re increasing engagement and amplifying its value”. Cloudflare reported third-quarter revenue of $782.5 million, up 39%, and its shares traded at $279.00 after hours, 14.7% above the regular-session close, by our arithmetic. Read: Atlassian’s results and Cloudflare’s results.
Nvidia has approached Apollo Global Management about turning buildings owned by Brightspeed, the broadband provider Apollo owns, into a network of small AI data centers, The Information reported, citing two people with direct knowledge of the effort; “Nvidia estimates the sites have roughly 1 gigawatt of available power”, the outlet said on X. Read: Nvidia and Apollo.
Market value lost by the same 12 AI stocks against the 4 November close, on 5 November 2026: about $930.1 billion at 10:04 a.m. ET, $1,087.0 billion at 11:44 a.m. ET and $1,447.4 billion at the close, 11.1% of the basket. Nasdaq quotes and official closes, SEC share counts; the dollar figures are our arithmetic.
The Structural Read
As we read it, the loss deepened through the session: on the same 12 stocks and share counts we counted about $930.1 billion at 10:04 a.m. ET, $1,087.0 billion at 11:44 a.m. ET and $1,447.4 billion at the close, by our arithmetic.
As we read it, the companies that rent out capacity were in the news as much as the chipmakers: The Information reported that IREN is one of the third parties whose late capacity left Microsoft spending about $5 billion less than planned, and IREN’s 10-Q says the Horizon change comes “At Microsoft’s request”. We do not say why prices moved.
As we read it, the labs’ listings were priced in the same hours: Polymarket’s price for an Anthropic IPO before the end of 2026 fell to 77.1% at 16:52 UTC from 90.1% at 15:00 UTC, and Anthropic’s S-1/A shows about 1.9 times cover for its next 12 months of obligations, by our arithmetic.
Rich Privorotsky, Goldman Sachs, in a trading-desk note as summarized by BigGo Finance and quoted in our piece of 5 November 2026
“may instead pull capital deployment forward into 2027, rushing to take advantage of current approval conditions and complete strategic deals before planning policies change.”
Three Implications
NEOCLOUD LANDLORDS Nebius, IREN and Nscale have put the value of their Microsoft contracts at up to $70.9 billion together, by our arithmetic, and CoreWeave’s own figures leave about 64% of its contracted power not yet active.
CREDIT SpaceX’s 5-year credit default swaps reached 286.56, according to Markit data cited on X, and Bloomberg reported that the Bank of England has queried market participants about data centers financed without a tenant in place.
BUILDERS Goldman’s Privorotsky argued that decision-makers may pull capital deployment forward into 2027, and one Kyber rack needs the power of 75 of today’s average racks, by our arithmetic.
The analysis describes a stack of nine layers, “running from energy at the bedrock to governance at the ceiling”, and says: “The supercycle has a ceiling now, and the ceiling is political.”
As we read it, the day’s sell-off and the neocloud reports sat on the compute and energy layers of that stack. We do not say one caused the other. The analysis was published in June 2026 and does not discuss this sell-off.
What Is Not Established
This roundup adds no new reporting and selects from the day’s coverage. Every figure above is taken from the linked FourWeekMBA piece, each built from its own primary source. The threads, and the reading of the sell-off and the build-out as one story, are our grouping, not a finding.
We do not claim that any one story moved the stocks. The market figures are our arithmetic from prices at the times labelled; several items rest on outlet reports citing people familiar with the matter; the prediction-market figures are traders’ prices; and METR gives its estimate “with high uncertainty”.
This Week In The AI Supercycle
Anthropic’s Reality Check, The Capital Squeeze, & The New World Order
This week’s issue: for two years the AI build-out was priced as a growthstory. This week it started being priced as a credit story.
By our arithmetic, 12 AI stocks closed $1,447.4 billion lower on 5 November and Nvidia fell 9.26%. The same day, Bloomberg reported that Microsoft is tightening oversight of neocloud projects whose disclosed Microsoft contracts add up to as much as $70.9 billion, by our arithmetic, and SpaceX’s 5-year default swaps reached 286.56, according to Markit data cited on X.
For the frame behind the day, read The AI Supercycle on The Business Engineer, on the nine layers from energy to governance: read the analysis.
95,000+ executives read Business Engineer for the AI strategy frameworks cited by ChatGPT, Claude, and Perplexity.
A note on sourcing. This roundup draws on FourWeekMBA’s news coverage of 4 and 5 November 2026, linked above; every story was built from its own primary source, which it cites and links. We re-read each piece on 5 and 6 November 2026 and took every figure here from it. The threads and the figures in our charts are our own grouping and selection. Nothing here is a forecast, and nothing here is financial or investment advice.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
