He Predicted the Dot-com Bubble Burst. Now He's Saying SpaceX Could be a Fresh Warning Sign.

The article argues that Jeremy Grantham, famous for calling the dot-com bubble top, sees SpaceX’s massive IPO as a potential warning sign for today’s AI-driven market. Grantham says the market is among the most expensive in history and warns that enthusiasm around AI resembles the late-1990s internet bubble. The piece emphasizes that while a broad sell-off is not advisable, investors with heavy AI exposure may want to trim risk at the edges and diversify into more defensive areas such as consumer staples, utilities, or value-oriented ETFs. It also notes that long-term buy-and-hold investing in broad index funds has historically recovered from crashes, including the dot-com bust and the Great Recession. Overall, the market impact is a cautionary bearish read on AI-laden equities, but not a call for immediate panic.