- Nasdaq fell more than 5% on November 5 as AI and chip stocks sold off[1]
- Anthropic’s amended IPO filing shows about $17 billion in third-quarter revenue[2]
- A tampered Claude Code extension reached up to 5,000 Cursor users[3]
- Fox completed its $22 billion acquisition of Roku[4]
- Microsoft staff weigh a 60,000-person buyout offer[5]
The AI chip selloff rattles global markets
Technology shares took the sharpest hit in nearly two years on Thursday, November 5. The Nasdaq fell more than 5%, its worst session since April 2025, according to CNBC reporting; Nvidia dropped about 9% and lost over $440 billion in market value, and Qualcomm slid after a weaker-than-expected forecast.[1] Reports put the drop in the Philadelphia Semiconductor Index anywhere from roughly 8.5% to 12%, so treat the exact figure with care.[1] The selling spread to Asia, where South Korea’s Kospi fell more than 6% and Japan’s Nikkei entered bear-market territory.[1]
Analysts offered several explanations: doubts over the cost and financing of the AI boom, a possible slowdown in data center construction after the US midterm elections, and the Qualcomm guidance.[1] One Bloomberg report, summarised by Techmeme, said congressional Democrats are poised to step up oversight of Nvidia over chip exports and circular financing, while TSMC is reportedly weighing 3D DRAM production for Nvidia amid memory shortages.[1] It lands just after record AI infrastructure spending commitments, which makes the market’s reaction a real test of how much buildout investors will fund.
Anthropic’s amended IPO filing
Anthropic filed an amended S-1 on November 2, extending its financials through September 30. Coverage reports about $17 billion in third-quarter revenue and roughly $895 billion in purchase commitments and leases, almost all tied to compute and infrastructure.[2] The share count and price range remain blank, and the roadshow cannot begin before November 10.[2]
The filing also says the company may be nearing the AI-acceleration threshold in its Responsible Scaling Policy, while stating that it has not designated any current model as exceeding it.[2] The Wall Street Journal reportedly found institutional investors steering valuation talk toward $1.5 to $1.6 trillion rather than the nearly $2 trillion floated earlier, with a listing targeted for the week before Thanksgiving.[2] Treat all valuation and timing figures as reports until an amended filing sets a range.
A poisoned Claude Code extension hits Cursor users
On October 29, a tampered copy of the Claude Code extension, versions 2.1.312 and 2.1.313, sat in Cursor’s extension marketplace for roughly 11 hours. It attempted to plant a persistent SSH backdoor and exposed up to 5,000 users.[3] Anthropic says it did not build, publish or host the malicious version, and Cursor removed it and suspended the marketplace to investigate.[3]
The practical lesson is that uninstalling may not be enough, because the payload drops standalone persistence scripts. Affected developers should update to version 2.1.314 and follow Cursor’s remediation steps.[3] Security experts quoted in coverage say extension marketplaces should be treated as part of the software supply chain.[3]
Fox closes its $22 billion Roku deal
Fox Corporation completed its acquisition of Roku on Friday, November 6, well ahead of the expected 2027 timetable. Roku founder Anthony Wood joins Fox’s board and co-chairs a new Fox Digital Platforms division that includes Roku, Tubi and Fox One, and Roku shares stop trading on the Nasdaq.[4] Trade press says the combination gives Fox access to more than 100 million streaming households, and Fox says Roku will remain an open ecosystem.[4]
Microsoft staff weigh 60,000 buyouts
Microsoft’s voluntary exit offer to about 60,000 employees, more than a quarter of its workforce, is still unsettling a company long known for stability, as spending shifts toward AI.[5] It is voluntary and time-limited, and an earlier retirement program this year drew roughly 30% of eligible staff.[5] Our earlier look at how Microsoft is reshaping Copilot explains where the money is going. Microsoft Ignite runs November 17 to 20 in San Francisco, and developers should watch for the final .NET 11 release this month.[5]
AI at work: rationing, savings and funding
Companies are starting to count tokens. Bloomberg reported that Goldman Sachs cut most non-engineers off from tools like Claude Code, while Revolut said moving AI coding to self-hosted open-weight models cut inference costs by roughly 90% in under a year.[6] Uber said only four rides were booked through AI agents in its busiest October week, a reminder that artificial intelligence adoption is uneven.[6] Meanwhile, Thinking Machines Lab is reportedly closing a $5 billion round at a $40 billion pre-money valuation.[6]
What to watch next
- November 10 or later: earliest date for Anthropic’s IPO roadshow and a price range in a further amended filing.[2]
- November 13: Apple HomeView ($299) goes on sale.[7]
- November 17 to 20: Microsoft Ignite in San Francisco.[5]
- Ongoing: whether chip stocks stabilise and how policymakers treat data center expansion.
Frequently asked questions
Why did tech stocks fall on November 5, 2026?
Investors questioned the cost and financing of the AI buildout, worried about possible delays to data centers after the midterms, and reacted to a weak Qualcomm forecast. The Nasdaq fell more than 5%.
Has Anthropic set an IPO price?
No. The November 2 amended S-1 still leaves the share count and price range blank, and the roadshow cannot start before November 10.
Was Anthropic hacked in the Cursor extension attack?
Anthropic says it did not build or publish the malicious extension, which was a tampered copy pushed through Cursor’s marketplace.
More from Techm News
- AI Infrastructure Spending Is Exploding
- Microsoft Is Reshaping Copilot
- The Rise Of Quantum Computing
- The Future Of Cryptocurrency And Digital Finance
Sources
- Markets: IBTimes UK (CNBC), HNGN, Devdiscourse (Reuters), HeyGoTrade, Techmeme
- Anthropic IPO: The Desk, Implicator.ai, Leverage Shares, AI Weekly (WSJ)
- Claude Code extension attack: SecurityWeek, BleepingComputer, GovInfoSecurity, Help Net Security, InfoWorld
- Fox and Roku: Adweek, TheDesk.net, TheWrap
- Microsoft: Engadget, Techmeme (New York Times), Thurrott
- AI at work: Newegg Insider, AI Weekly, The Neuron
- Apple HomeView: Gizmodo