Ray Dalio, the billionaire founder of Bridgewater Associates, has issued one of his most alarming warnings yet about the current state of the market. During a recent interview on The Diary of a CEO with host Steven Bartlett, Dalio highlighted how the current enthusiasm surrounding artificial intelligence is pushing markets into what he describes as bubble territory. This warning echoes the infamous market crashes of 1929 and the dot-com bust of 2000. As Dalio spoke, the market was already testing his thesis in real time. Companies like SpaceX were going public in what could be the largest initial public offering in history. AI powerhouses like Anthropic and OpenAI were inching toward trillion-dollar valuations. Financial historians have long associated these patterns with speculative bubbles.
How we got here
Bartlett opened the conversation by referencing a prior guest, Jeremy Grantham. He had told the show that markets are facing "the biggest investment bubble in American history." Dalio echoed this sentiment directly. He agreed with Grantham's assessment. Grantham, known for his sharp eye, has a history of identifying bubbles before they burst. He correctly flagged the Japanese asset bubble in the early 1990s. He also identified the dot-com bubble in 1999-2000 and the housing crisis in 2007. This was just as the Federal Reserve was downplaying such concerns. In April, Grantham elaborated on his current concerns for Fortune. He described what he calls a "bubble within a bubble." He explained that the original bubble had been inflating dangerously through 2021. It had briefly cracked when the S&P 500 fell by about 25% from January to October 2022. But this downturn was reversed soon after the release of ChatGPT.
According to Grantham, AI did not fix the underlying overvaluation of the market. Instead, it only delayed the reckoning, making it more severe. This idea is supported by a January 2026 paper co-authored by Grantham and financial historian Edward Chancellor. The paper found that current market valuations, as measured by the price/book ratio and cyclically adjusted earnings multiples, have reached extremes. These extremes are comparable only to the years 1929, 1972, 1999-2000, and 2021. All of these years were followed by devastating corrections. Grantham described these events as part of a broader pattern. The latest chapter is unfolding around AI and its rapid integration into the economy.
The money machine
Owen Lamont of Acadian Asset Management has outlined what he calls the "Four Horsemen of the Bubble Apocalypse." These include extreme overvaluation, widespread belief in the bubble despite acknowledging its risks, a surge in equity issuance, and the entry of new market participants. Dalio’s insights align closely with the third horseman: the rise in stock issuance. He described how companies can raise relatively modest amounts of capital, such as $50 million. Yet these companies can be valued at a billion dollars. This process allows for the creation of "paper billionaires." These are individuals whose wealth exists only on paper, without any actual cash changing hands. This pattern has shown up repeatedly in history. It has consistently led to market corrections.
SpaceX has already gone public, but its stock has traded below its IPO price. Meanwhile, S&P has forecasted that the company will continue to post negative free cash flow through 2029. Moody’s has also raised concerns about Elon Musk’s concentrated voting power, which it views as a potential governance risk. Anthropic and OpenAI are both preparing for their own listings, with Anthropic expected to file confidentially for an IPO and targeting a valuation near $1 trillion. OpenAI has also filed for an IPO and is expected to debut with a valuation that some analysts predict could surpass $1 trillion. However, OpenAI's IPO has faced delays, moving from an expected 2026 date to possibly 2027 as market conditions shift.
The coming squeeze
Dalio explained how these bubbles can burst using a straightforward example: imagine buying a unit of an AI company for $100, then borrowing against that paper wealth. If the market suddenly turns and prices drop to $25, investors still owe the money they borrowed, even though the value of the asset has plummeted. This highlights the fundamental difference between wealth and money. As Dalio emphasized, "Wealth is not the same as money." You may see someone growing wealthy on paper, but true wealth must be converted into money to be of use. To spend, you need actual cash, not just the illusion of value.
Dalio didn’t hesitate to confirm his belief that the current market is in bubble territory. He stressed that a bubble is "a degree thing" rather than a simple yes or no. He pointed to the increasing number of weak-handed, unsophisticated investors who are jumping into leveraged bets, such as leveraged ETFs that track the stock market. These investors are essentially gambling, Dalio said, like "crapshooters" placing high-stakes wagers. Grantham’s diagnosis of the root causes of bubbles complements Dalio’s view. He explained to Fortune that markets are "constitutionally incapable of looking further than the present moment." They keep extrapolating current conditions and "double-counting prosperity," which ultimately leads to bubbles. Even Wall Street, which has traditionally been bullish, is now sounding alarms. Research teams that have historically painted a rosy picture of the market are now acknowledging the risks, joining the growing chorus of concerns about overvaluation and speculative excess.