AI Bubble: Private Valuations vs Public Reality
An analysis of the divergence between AI startup valuations and public market multiples. The AI bubble is concentrated in private equity, where OpenAI and Anthropic trade at unsustainable levels compared to public peers like Nvidia. Upcoming IPOs will force a reckoning with true profitability.
The Divergence of AI Valuations
The current AI market presents a paradox: while headlines suggest a looming bubble, public market data indicates a cautious, risk-adjusted environment. The true speculative excess is confined to the private sector, where venture capital valuations for firms like OpenAI and Anthropic have decoupled from fundamental financial metrics. This divergence creates a significant risk for upcoming initial public offerings (IPOs), which will force these companies to confront the stricter valuation standards of Wall Street.
Public Market Compression
Contrary to popular belief, the AI bubble is not driving public stock prices to irrational heights. Major chipmakers such as Nvidia, Broadcom, and Micron have seen their price-to-earnings multiples contract by 48% to 56% over the past year. This compression reflects investor skepticism regarding the sustainability of AI-driven earnings, particularly given the high customer concentration and rising financing costs in the sector. While stock prices have risen due to exploding profits, the premium paid for those earnings has decreased, signaling a mature, risk-aware market rather than a speculative mania.
The Private Sector Bubble
The speculative frenzy is isolated in private markets, where OpenAI and Anthropic are valued at $1.4 trillion and $2 trillion, respectively. These valuations are supported by venture capital metrics that prioritize founder vision and talent over margins and profits. However, these companies are currently losing billions annually. When adjusted for true costs, including training expenses and revenue sharing, their profitability is questionable. Applying public market multiples, such as Nvidia’s price-to-sales ratio, would halve these valuations, revealing a significant overvaluation in the private sector.
Operational and Financial Risks
The infrastructure supporting AI, particularly neoclouds like CoreWeave, faces severe financial stress. High debt loads, combined with rising construction costs and slowing capital inflows, have pushed credit spreads to crisis levels. Furthermore, the entry of cheap Chinese open-weight models has deflated AI token prices, forcing frontier labs to reduce prices by up to 80%. This dynamic of rising costs and falling prices threatens the unit economics of the entire AI ecosystem.
Strategic Implications
Investors should distinguish between public AI stocks, which are priced with caution, and private AI startups, which are priced on hype. The upcoming IPO of Anthropic will be a critical test of this divergence. If management delays the listing or reduces the price, it will confirm the presence of a private market bubble. For entrepreneurs and investors, the focus must shift from narrative-driven valuations to sustainable unit economics and true profitability.
Key insights
Action items
Quotes
“That's like taking out a margin loan to buy treasuries, Gil told us.”
“The bubble's not in the stock market. It is hiding somewhere else.”
“It's equivalent to me inserting lifts in my shoes and saying, I'm six foot six, but on an adjusted basis.”