Anthropic has launched the roadshow for a Nasdaq listing that would value the company at more than $1.2 trillion at the midpoint of the price range announced on November 10. The debut is expected in the week of November 16, one of the largest capital raises in years.

Investor sentiment toward artificial intelligence had already cooled before the roadshow began. The sell-off that followed the US midterm elections revived worries about regulation and the sustainability of valuations. The market greeting the new arrival is far more fragile than it was a few quarters ago.

Anyone holding technology ETFs or growth funds has reason to think through the contagion risk now, before the stock trades, rather than after an unpleasant surprise in their brokerage account.

A trillion-dollar-plus valuation built on intangibles

The comparison with SpaceX, which went public in June, comes easily, and that is the problem. SpaceX arrived with Starlink’s cash flows, built on recurring subscriptions and institutional contracts. Anthropic’s value rests far more on intangible assets, starting with its researchers, and on growth forecasts tied to corporate adoption of generative AI. Competitors can always call those forecasts into question.

price discovery, the market’s process of finding the right price, is therefore likely to be slower and more jittery than usual. Fundamentals are hard to read and future revenues hang on variables that are not yet visible. The opening price will almost certainly be no more than a first attempt.

The risk coming out of Washington

Politics gets little attention in the debate. Democrats won majorities in both chambers of Congress in the November elections, and the rules of the game could change for the big AI platforms. Legislation on algorithmic transparency and model safety, a distant prospect until recently, now has a better chance of reaching the floor. Regulatory risk becomes a variable inside Anthropic’s business model, and a much harder one to control.

Then there are low-cost open source models, which as early as 2025 helped push down the share prices of several AI stocks. If a comparable model can be distributed and customized without license fees, the uniqueness premium behind a valuation this size comes under scrutiny.

How contagion would reach the Nasdaq

The direct weight of a single stock in an index matters little. A broad index like the S&P 500 absorbs a new listing without major shocks, especially in the first few weeks, when inclusion requirements are not yet met and index funds are under no obligation to buy. The danger travels by indirect routes.

The Nasdaq is different. The index is heavily concentrated in technology and AI, and it reacts more than others to any sign that the sector is being marked down. If Anthropic’s valuation collapsed in the weeks after its debut, the market could read that as proof that investors will no longer pay speculative multiples for AI growth. The industry term is sentiment contagion, and it would not be the first time. In 2024 and 2025, disappointing quarterly results from some AI companies dragged the whole sector lower, because the market tends to reassess an entire industry when a bellwether shows cracks in its fundamentals.

What this could mean for real portfolios

For a retail investor holding technology ETFs or growth funds, the scenario is anything but theoretical. An ETF tracking the Nasdaq 100 is concentrated by construction in the ten largest stocks by market capitalization, and many of those depend, directly or indirectly, on the artificial intelligence cycle, from chipmakers to cloud providers.

The big corrections in the AI sector in recent years have always taken hold where cracks were already visible: inflated valuations, investments slow to pay off. Anthropic’s IPO risks concentrating those tensions in a single event, at a moment when sentiment is already weak.

Editor’s note

This article was originally published in Italian on money.it by Tommaso Scarpellini on November 15, 2026 as «L’IPO di Anthropic potrebbe far crollare il Nasdaq». It has been translated and adapted for an international audience by the Money.it International desk.