For decades, the pattern repeats with clockwork regularity. Stock markets soar to unprecedented heights, skeptics issue dire warnings of collapse, and then... nothing happens. The market keeps climbing. The skeptics fade into obscurity. And everyone who ignored them gets richer.
We are living through that cycle again, and it is becoming dangerous.
The S&P 500 and Nasdaq continue their ascent despite mounting warnings from serious financial voices. Jeremy Grantham, the 87-year-old founder and investment adviser of one of the largest asset managers in the world, recently declared the AI bubble about to burst and announced he was selling. Ludovic Subran, chief investment officer at Germany's largest insurer Allianz, called the market "bubble territory" after SpaceX raised $25 billion in bonds mere weeks after securing $86 billion in its record-breaking New York listing. Dhaval Joshi, head of global strategy at BCA Research, compared the current mood to the "madness of crowds."
Investors have become so hardened to warnings that they no longer flinch. When geopolitical tensions erupted at the end of February and threatened market stability, panic lasted only as long as it took for a political negotiation to be announced. Fear of missing out proved stronger than fear of collapse. The cycle accelerated.
The concentration of wealth in seven companies tells part of the story. Amazon, Alphabet, Nvidia, Meta, Microsoft, Apple, and Tesla now dominate equity markets to a troubling degree. The top 10 companies alone represent about 40 percent of the S&P 500's total market capitalization, a figure that exceeds the 27 percent peak reached during the dot-com bubble at the turn of the millennium.
Yet this metric alone does not explain why the rally persists. The "Magnificent Seven" are generating enormous profits. Tech giants like Google and Meta remain advertising powerhouses with room for revenue growth. The economic environment continues to favor continued investment, with global savings looking for returns and a political climate that has shown reluctance to aggressively check financial markets.
Grantham's comparison to railways and the internet offers a framework. Those technologies revolutionized society, but investors who poured capital into railroads and internet startups saw value concentrate not in the technologies themselves but in the services and utilities built atop them. Today's tech giants may face a similar reckoning as artificial intelligence matures from novelty to infrastructure. Once AI becomes as commonplace as electricity, the profit margins that justify current valuations could compress sharply.
The real trigger for a crash remains unknown. Economic recession, aggressive interest rate increases, or some unforeseen financial shock could each serve as the catalyst. Investors obsessed with correlation rather than diversity of opinion risk blindsiding themselves when sentiment finally shifts.
What we know for certain is that both corporations and investors are working overtime to delay the inevitable. Profitable companies borrow aggressively to fund more investment. Markets move instantly to discount negative news. Everyone stays in the game because nobody wants to be left behind when the music is still playing.
The bubble has further to run. But that does not mean it will not burst.
Author James Rodriguez: "The irony is that warnings about a crash will probably prove correct eventually, but the timing may be off by years or even decades, which is exactly why so many smart people keep ignoring them until it is too late."
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