Jeremy Grantham, the co-founder of GMO, said that artificial intelligence enthusiasm is inflating the U.S. stock market into its largest bubble ever [1, 2].
This warning comes as Big Tech companies see massive valuation increases driven by AI integration. If the speculative bubble bursts, Grantham said the resulting collapse could rival the severity of the Great Depression [1, 2].
Grantham is a veteran investor known for identifying long-term market trends and historical bubbles. He said the current market trajectory is unsustainable because the hype surrounding AI is pushing valuations beyond the actual economic utility of the technology [1, 2].
According to Grantham, the current environment mirrors previous speculative manias where investor optimism overrides fundamental financial data. He said that the scale of the current inflation in asset prices creates a risk of a catastrophic burst [1, 2].
While many analysts view AI as a fundamental shift in productivity, Grantham views the market's reaction as an overextension. He said that the disconnect between stock prices and intrinsic value is widening, which historically precedes a sharp correction [1, 2].
The investor said that the concentration of wealth and market cap in a few AI-driven firms increases the systemic risk to the broader economy. He said that when such a large bubble pops, the impact is felt across all sectors, not just technology [1, 2].
“AI enthusiasm is inflating the U.S. stock market into its largest bubble ever.”
This perspective highlights a growing divide between 'growth' investors, who believe AI represents a new industrial revolution, and 'value' investors, who see a speculative bubble. If Grantham's assessment is correct, the high concentration of AI-related gains in a few mega-cap stocks creates a single point of failure for the broader U.S. equity market.
