Speaker
Jeremy Grantham
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1 episodes
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1
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Jeremy Grantham says the current AI-driven market is the biggest investment bubble in American history, surpassing the dot-com boom and the 1989 Japanese market peak.
Grantham says the most overpriced AI stocks could fall 70% from current levels, noting the NASDAQ fell 82% during the 2000 tech bubble.
Despite going up 6-7 times before the crash, Amazon fell 92% during the tech bubble collapse before eventually inheriting the retail world.
Japan's stock market peaked in 1989 at 65 times earnings and took 35 years to recover, serving as a warning for the overpriced US market today.
UK house prices rose from 3.4 times annual family income in 1994 to over 10 times today, pricing young couples out of homeownership entirely.
Human sperm count has fallen from an estimated 180 million units per milliliter in hunter-gatherer times to just 35 million today, with the rate of decline accelerating at 2.5% per year.
The World Health Organization estimates that 17% of young couples currently need help getting pregnant, up from near zero 15-20 years ago when average sperm counts were still above the 45 million threshold.
The EU has banned 1,500 chemicals from cosmetics, Canada has banned 550, while the US FDA has banned only 12, reflecting vastly different regulatory approaches to consumer safety.
The life expectancy gap between the US and Sweden has grown from 2 years to 6 years over the last 70 years, which Grantham attributes to the US's more permissive approach to toxic chemicals.
Over the last 12 months, emerging markets have risen 65% while the S&P 500 is up only 25%, supporting Grantham's case for investing outside the US.
Jeremy Grantham's firm GMO managed up to $165 billion in assets at its peak, making it one of the largest institutional investment firms by AUM.
A fetus is estimated to be 100 to 1,000 times more vulnerable to toxic chemicals than an adult, meaning maternal exposure to pesticides or plastics has a disproportionate impact on unborn children.
A Harvard and Mass General Hospital study of 180 men found that those eating the fewest pesticide-heavy foods had double the sperm count of those eating the most contaminated foods.
The US has a maternal mortality rate of approximately 21 per 100,000 births, compared to near zero in Norway, making the US 50% worse than the second-worst developed nation.
Jeremy Grantham has donated 90-95% of the over $1 billion he personally made to the Grantham Foundation for the Protection of the Environment, focused on green technology.
2.1 children per couple is the replacement rate for a stable population. Like clean air or clean water, it's a commons — but nothing tried across 200 policy experiments in any country has permanently raised birth rates. Capitalism's focus on financial achievement over community and child rearing is making the human species incompatible with itself.
The AI investment bubble is the biggest in American history. Every major bubble — railroads, the internet — follows the same pattern: a genuinely great idea attracts so much money that overvaluation becomes extreme, and the bigger the idea, the bigger the bust.
The exact strategy: 60% in non-US broad index funds, 5-10% precious metals, some real estate, the rest in bonds. Zero US stocks, zero crypto. Non-US equities have outperformed the S&P 500 by 40 percentage points in the last 12 months — and Grantham doesn't trust US equities to remain intact in 5-10 years.
At a 1998 investment conference, 99% of 400 professional analysts privately agreed the overpriced market would crash — guaranteeing a major bear market. Yet their employers were on stage telling clients everything was fine. This conflict of interest hasn't changed and never will.
Human sperm counts have plummeted from 180 million to 35 million units per milliliter since hunter-gatherer times, with the decline accelerating at 2.5% per year. In 20-25 years, the average couple will need medical help to conceive. This is tomorrow — not some distant future problem.
SpaceX defines its addressable market as a quarter of global GDP and talks about mining asteroids. These are exactly the kinds of extraordinary claims that define market peaks. In 50-100 years, people will tell stories about SpaceX's prospectus the way they tell stories about the South Sea Bubble.
Apple, Google, Microsoft, Meta, Amazon, Tesla, Nvidia each had near-monopolies in their own space. Now they're all pouring hundreds of billions into the same AI battle with no guaranteed winner. The shift from 7 separate monopolies to 7 brutal competitors is one of the most dramatic reversals in corporate history.
A Harvard and Mass General Hospital study showed men eating the fewest pesticide-heavy foods had double the sperm count of those eating the most. Women with the cleanest diets had a 68% live birth rate versus 38% in the dirtiest quartile. Pesticides are literally on your food — and they're designed to kill our biological cousins.
The EU has banned 1,500 chemicals from cosmetics. Canada has banned 550. The US has banned 12. This regulatory gap directly contributes to the US having a life expectancy 6 years lower than Sweden — a gap that has tripled over 70 years and is still growing.
The US Gini ratio is now comparable to Brazil and Mexico. Since 1975, nearly all economic gains have gone to the top 10%. History shows extreme wealth inequality has only ever been reset by three catalysts: civil collapse, mass mobilisation warfare, or revolution. There is no documented peaceful fix.
Maternal mortality in the US is 21 per 100,000 — 50% worse than the second-worst developed country and 10 times worse than Norway. This isn't a healthcare problem alone; it's the signature of a society where inequality has stripped away the basic safety net. Grantham suggests Denmark, Japan, Germany, or France as better places to raise a family.
Despite predicting the AI bubble will burst, Grantham's advice for wealth creation at 33 is simple: get deep into AI, know more than everyone else in the room, join a leading firm, and take big risks. Ride the wave while it's coming in — even if you know it will eventually crash.
Diversify into non-US equities, hold bonds, keep some cash, and put 5-10% in precious metals. Property is fine but overpriced. Zero crypto. If you hold US tech stocks, sell them. Grantham lost half his book of business for telling clients this in 1998 — but history proved him right.
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