US stock valuations approach dot-com bubble highs, Shiller P/E ratio rises to 42.18

US stock valuations are approaching the levels seen during the dot-com bubble, according to CoinDesk. The Shiller CAPE ratio, a measure of long-term valuation, has risen to 42.18, just below the 44.19 peak of the 1999 bubble. Historical data shows that the S&P 500 index subsequently fell by approximately 50% after the 1999 high. Market analysis suggests that valuation risks in US stocks are accumulating again amid the AI boom driving continuous gains in tech stocks.