Are U.S. equities in bubble territory by standard valuation measures?
Core argument: GMO argues U.S. equities are extremely overpriced by every historically effective valuation metric, with a CAPE of 40 above any level seen outside the very peak of the internet bubble.
At GMO, we have always defined a bubble as a two-standard-deviation divergence of the price of any asset class above its long-term real price trend. The U.S. stock market has now been in bubble territory for a prolonged period. Sooner or later, the bubble will burst and the price will return to its historic level. By every historically effective valuation metric, U.S. equities are now extremely overpriced. Their CAPE of 40 is above any level seen outside the very peak of the internet bubble. The U.S. market cap to GDP ratio, the so-called Buffett Indicator, is at all-time highs. A record proportion of the U.S. stock market trades at over 10 times sales; AI-enabled surveillance company Palantir trades at over 100 times sales. Tesla, Musk's flagship company, trades at over 300 times earnings, with earnings down 61% year over year and negative revenue growth.

