Jeremy Grantham warns the US stock market is the most expensive in history with a 235% Buffett Indicator, saying AI stocks risk declines of up to 70%.

Jeremy Grantham warns the AI bubble is the biggest in U.S. history, predicts a 70% crash, and says bitcoin will eventually go to zero.

Jeremy Grantham says soaring valuations around AI makes the U.S. stock market historically expensive.