Ray Dalio’s diversification lessons, drawn from a near-ruinous episode early in his career that left him borrowing $4,000 from his father, became the bedrock of Bridgewater Associates and, he says, can reduce investment risk by up to 80% without diminishing returns.
Dalio recounted the episode to interviewer David Rubenstein, saying the experience instilled both humility and a simple but powerful understanding of diversification. He said he had been badly wrong on a market call and was effectively broke, forced to borrow money from his father to keep going.
Two lessons from financial rock bottom
Dalio said the crisis produced two lasting insights.
The first was a practice of documenting his decision-making criteria, which he began roughly 35 to 40 years ago. Writing down the specific rules he would use to make a call forced deeper thought, he said, and he later realised those criteria could be coded and back-tested. He calls this collection of rules his ‘principles,’ of which he has written down thousands. The approach became the foundation of Bridgewater and the title of his New York Times bestseller.
The second lesson was the Ray Dalio diversification principle itself: that 15 good uncorrelated return streams, engineered to carry similar expected returns, lowers risk dramatically and boosts the return-to-risk ratio by a factor of five. Dalio described this as the ‘bottom of Bridgewater,’ after which the firm recorded consistent positive returns, averaging roughly 11.8% over the subsequent 30-plus years, with only minimal annual declines.
‘Nobody does everything perfectly, not even Warren Buffett,’ Dalio told Rubenstein, adding that the episode gave him ‘humility’ to temper his ‘audacity.’
Ray Dalio diversification lessons inform new book on national debt
Those same principles now underpin Dalio’s latest work. How Countries Go Broke: The Big Cycle, published on 3 June 2025 by Porchlight Book Company and running to 400 pages, applies the mechanics Dalio said he first grasped in the early 1980s to sovereign economies.
Dalio wrote on LinkedIn that he sees the US and other countries ‘headed toward having the equivalent of economic heart attacks.’ He often posts warnings about America’s record $37 trillion national debt.
In a statement, Dalio said the credit and market system resembles the human circulatory system, ‘bringing nutrients to all parts of the body that make up the markets and economy.’ When that system fails to generate enough income to cover debt and interest, he wrote, ‘debt service will build up like plaque that squeezes out other spending.’
He added that ‘the same basic big cycles that drive these systems to change have happened thousands of times before for the same reasons,’ and that he believes the world is ‘on the brink of very big changes.’
Dalio said he now finds ‘great joy’ in explaining these cause-and-effect relationships, operating on the principle that ‘if you worry you don’t have to worry, and if you don’t worry you need to worry.’ For him, the $4,000 loan from his father was not merely a low point but the starting line for everything that followed.
