Jeremy Grantham says this is 'the most expensive market in 'American history'

Jeremy Grantham, co-founder of Grantham Mayo Van Otterloo, has issued a stark warning about U.S. stock valuations, calling the current market 'the most expensive in American history.' His latest commentary, shared across financial platforms, ties the surge to intense AI-driven competition, which he describes as 'vicious' and unsustainable for long-term tech profitability. Grantham’s repeated calls to exit U.S. equities—particularly via ETFs like SPY—echo his past bubble-spotting record, including the 2000 dot-com crash and 2007 financial crisis. Coverage emphasizes Grantham’s historical credibility and the urgency of his tone, with outlets like *CNBC*, *Seeking Alpha*, and *QZ* framing his remarks as a direct challenge to current market optimism.

His analysis, published on platforms such as *A Wealth of Common Sense* and *eciks.org*, highlights how AI-related investments may be distorting valuations beyond fundamentals. The repetition of his warnings across multiple channels underscores the debate over whether the market is overvalued or simply reflecting a new paradigm. What to watch next: Grantham’s specific exit strategies for investors, potential reactions from major asset managers, and whether his warnings trigger noticeable shifts in AI-focused stock sectors or broader market indices.

Coverage does not yet specify whether Grantham’s firm or associated funds are acting on his advice, nor does it detail alternative asset classes he may be recommending.