NYU Finance Professor Damodaran: The Most Fragile Element in Anthropic's Valuation Is Not the Cost of Capital, but the Trillion-Dollar Revenue Assumption
Following the release of his valuation for Anthropic, New York University Stern School of Business finance professor Aswath Damodaran received extensive feedback. He conducted a self-critique, ranking assumptions by their fragility, and concluded that the core variable driving the $1.45 trillion valuation is not the 9.74% cost of capital, but the assumption that Anthropic will achieve one trillion dollars in annual revenue within ten years. Using historical returns, market-implied expected returns, and pricing multiples as three checks, he demonstrated the internal contradictions in arguments favoring high discount rates, suggesting that readers concerned about default risk should adjust the probability of failure rather than the discount rate.
Aswath Damodaran, a finance professor at the Stern School of Business at New York University, received a large volume of feedback after publishing an intrinsic valuation for Anthropic. In an article posted on November 3, he subjected his own valuation to self-criticism, ranking input variables along two dimensions: the magnitude of their impact on value and their degree of uncertainty. This analysis led to a clear conclusion: the most critical variable driving the $1.45 trillion valuation is not the cost of capital, but his assumption that Anthropic will reach one trillion dollars in annual revenue within ten years. If this revenue target is missed, profit margins will decline, compute assets will sit idle, and the risk of failure will rise, causing more drastic shifts in valuation.
Damodaran selected a cost of capital of 9.74%, which incorporates the cost of equity for high-risk technology companies and the cost of debt based on a BB+ credit rating. This places Anthropic close to the 90th percentile of U.S. companies in 2026 regarding capital costs. In the latter part of his article, he dedicates three full sections to arguing why this figure is not the central controversy of the valuation, and why claims that 12%, 15%, or even 20% are reasonable discount rates contain internal contradictions.
His first check is historical. The U.S. stock data he maintains spans from 1928 to 2025: the average annual return from 2001 to 2025 was 8.74%, from 1976 to 2025 it was 11.92%, and from 1928 to 2025 it was 10.13%. Looking solely at the equity risk premium (the excess return of stocks over government bonds), the premium relative to 10-year Treasury bonds ranges from 5.5% to 5.75%, and relative to short-term Treasuries, it ranges from 7% to 7.5%. Using the 10-year Treasury rate of 4.9% on October 26, 2026, as a baseline, the cost of equity for an average-risk company would be approximately 10.4% to 10.65%. He specifically notes that these historical figures come from the United States—the most successful stock market globally—and suffer from selection bias, potentially overstating future returns; therefore, using a higher discount rate than what history provides is even less defensible.
The second check is market-implied. Damodaran calculates the implied expected return for the S&P 500 monthly: in early October 2026, this figure stood at 8.99%, and it is independent of any specific asset pricing model—whether you believe in CAPM or not, the return implied by current market pricing is 8.99%. He further points out that almost any skepticism regarding cash flows or growth rates would drive this number lower, not higher. Therefore, claiming that the cost of equity for a median U.S. company should be 12% or 15% is equivalent to asserting that you cannot earn that return on an investment of equivalent risk in this market, yet still insisting on that number. Since 1994, the implied expected return on the U.S. stock market has never exceeded 10%.
The third check is consistency with pricing multiples. If one assumes a cost of equity for U.S. companies of 15%, combined with roughly 5% nominal economic growth and an average return on equity of 20%, the market P/E ratio should be only 7.5x. However, the actual forward P/E ratio is closer to 20x. This means you either sell all your stocks or revisit your discount rate assumptions. Similarly, a 12% cost of capital corresponds to enterprise value/operating income multiples of roughly 9x and EV/EBITDA multiples of 6 to 7x, which are far below current market levels. Damodaran concludes: if you claim the cost of equity is 15% while simultaneously arguing that a market P/E of 15x is reasonable, you are being internally inconsistent.
For readers concerned about Anthropic's default risk, Damodaran offers a key distinction: the cost of capital is a going-concern concept and should not absorb all default risk into the discount rate. He estimates Anthropic's total contractual commitments at approximately $450 billion, with a present value of about $373 billion, of which roughly $70 billion comes due next year and $76 billion the year after. The company currently holds $114 billion in cash and is expected to hold over $200 billion post-IPO. He has already embedded a 10% probability of failure in his valuation—that is, scenarios where Anthropic encounters headwinds, fails to meet contracts, and is forced to fire-sale assets. He argues that if your concerns exceed this level, the variable to adjust is the probability of failure, not the cost of capital. In fact, if one ignores failure risk and jams all default concerns into the discount rate, a cost of capital of about 11% would be required to arrive at a valuation similar to his.
Damodaran also criticizes the 20%, 30%, and even 50% target returns commonly used by venture capital and private equity industries. Citing data from Cambridge Associates, he notes that the actual long-term returns of these funds are not only far below their stated targets but also surprisingly close to those of public stock index funds. He believes these fabricated numbers are not merely marketing fluff; they feed back into how much equity founders must surrender and explain why VC and PE investors consistently fail to create value for their limited partners.
In the feedback section, Damodaran tallied the distribution of valuations from readers in a shared spreadsheet: most believed he overvalued Anthropic, with the group consensus closer to $1 trillion rather than $1.5 trillion. Among the dissenters, aside from intuitive judgment, the single largest reason cited was that a 9.74% cost of capital is too low. He expressed disappointment, though not surprise, observing that appraisers and analysts have long treated the cost of capital as a dial to be turned arbitrarily to express optimism or pessimism, lacking an understanding of its economic meaning and real-world constraints.
His final advice is to shift the discussion focus back to what truly matters: Can Anthropic achieve one trillion dollars in revenue within ten years? If this assumption does not hold true, profit margins, reinvestment needs, and risk will all deteriorate in the same direction. For investors dealing with this uncertainty, he outlines four paths—complete ignoring (the gambler approach), complete avoidance (holding only mature assets), setting a margin of safety, and utilizing the law of large numbers to diversify holdings. Which path to choose depends on your risk tolerance and portfolio structure, rather than a single unified discount rate number.