https://www.live-feeds.com/feed/jeremy-grantham-says-this-is-the-most-expensive-market-in-american-historyContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/jeremy-grantham-says-this-is-the-most-expensive-market-in-american-historyhttps://www.live-feeds.com/feed/jeremy-grantham-says-this-is-the-most-expensive-market-in-american-history#u21622Thu, 02 Jul 2026 16:51:53 +0000Investor Jeremy Grantham claims the U.S. stock market has reached its most expensive valuation in American history. He attributes this record high to the artificial intelligence boom. Grantham advises investors to exit U.S. equities to avoid a predicted historic crash.What's confirmed:Jeremy Grantham stated that the U.S. market is the most expensive in American history based on the stock market value compared to GDP with modifications.Grantham claims the artificial intelligence boom pushed U.S. stocks to a record high.The GMO co-founder warned that U.S. stocks could plunge 70%.Grantham believe