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The Diary Of A CEO with Steven Bartlett
The Diary Of A CEO with Steven Bartlett

Stock Market EMERGENCY: Sell Your Stocks Now, The Collapse Is Weeks Away!

June 25, 2026 • 1h 45m

Summary

⏱️ 25 min read

Overview

Jeremy Grantham, a legendary investor who managed up to $165 billion, shares his contrarian views on market bubbles, AI hype, investment strategy, and societal challenges. At 87, having given away over 90% of his wealth to environmental causes, he warns of an impending market collapse, the fertility crisis caused by toxic chemicals, and declining social contracts. He offers practical advice on diversification, avoiding US stocks, and preparing for tougher economic times ahead while emphasizing the urgent need to detoxify both our environment and capitalist systems.

Personal Wealth Philosophy and Legacy

Grantham reveals he has given away over 90-95% of his billion-dollar fortune to his foundation focused on protecting the environment and green tech. He explains his investment philosophy of specializing in longer-term horizons and higher levels of abstraction, always asking what people are missing. He emphasizes humans' predisposition to optimism and short-term thinking, which creates opportunities for those willing to think differently and take contrarian positions despite career risk.

  • Grantham made over a billion dollars personally and has given 90-95% away to the Grantham Foundation for Protection of the Environment
  • His firm will have written checks for a billion dollars to climate change work by end of this year
  • He specializes in longer-term horizons than most people and trying to look at higher levels of abstraction - what is really going on and what are people missing?
  • Humans are incredibly short-term oriented with enormous predisposition to optimism, looking for optimistic news and avoiding unpleasantness
  • The idea of steady compound growth is ridiculous - Boulding said only madmen and economists think you can have compound growth on a finite planet
" I'm generally referred to as a billionaire, but that's only because they count the money you give away. Because I've given over 90% of my billion away to a foundation. "
" The only people who think you can have compound growth on a finite planet are madmen and economists, which is so accurate. "

The AI Bubble and Market Collapse Warning

Grantham argues that AI represents the biggest investment bubble in American history, drawing parallels to the railroad and internet bubbles. While acknowledging AI as a transformative technology on par with the railroads, he warns that great ideas always attract the most capital and create the largest bubbles. He predicts a potential 70% decline in high-flying tech stocks and expects the collapse could happen within days, weeks, months, or certainly within years, followed by a miserable economic period.

  • AI is one of the defining great ideas of the last couple hundred years that will change everything, but great bubbles always occur around the most important ideas
  • The biggest bubbles in history include railroads, the internet (Amazon down 92% in the tech crash), and Japan 1989 (market took 35 years to recover)
  • This is arguably the biggest investment bubble in American history, with indicators of crazy euphoria everywhere
  • High flyers would be expected to come down the most - a 70% decline would not be unexpected from these unprecedented levels
  • The NASDAQ came down 82% in the tech bubble; the bigger the bubble, the bigger the bust
" The great bubbles always occur around the very most important ideas. So the railroads, everyone could see that it would change the world and everyone wanted to put their money in and everybody put their money in. They over-invested and even though the railroads were a spectacularly powerful idea, The railroads collapsed as stocks and everybody lost a ton of dough. "
" If you look at the data, it would be compatible with history for the peak to be very soon. Everything is in line. This is, I think, the biggest investment bubble in American history. "
" SpaceX is such a fabulous BS story. Mining asteroids. It's a huge, incredible success of AI. It's the classic description of a market peak. It's what you look for at the top of a terrific bubble. "

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