The Stock Market Is Repeating a Pattern Last Seen Decades Ago -- Here's What History Says Happens Next

The current bull market is characterized by narrow leadership, with a near-record number of S&P 500 companies exhibiting negative beta—a pattern last seen during the dot-com bubble. While a handful of AI stocks have driven gains, many companies have seen prices collapse. This concentration poses risks: if the bubble pops, diversification into quality and value stocks may be necessary, though it could reduce returns if the bull market continues.