Current stock market valuations explained
From Pedro Domingos, a CS prof at University of Washington, the best current explanation for stratospheric stock market valuations:
Oracle’s main business these days is promising vast amounts of cloud computing it doesn’t have to AI companies who don’t know how they’ll pay for it.
WSJ, a month ago:
The S&P 500 currently trades at 22.5 times its projected earnings over the next 12 months, compared with the average of 16.8 times since 2000. … The 10 largest companies in the S&P 500 accounted for 39.5% of its total value at the end of July, the most ever…
How badly beaten up did investors who bought into stocks at a high P/E ratio get? I asked Grok “Consider an investor who purchased the S&P 500 in February 2000. What annual return on investment would he or she have received through August 2025 vs. an investor who bought in August 2002 and held through August 2025?” and learned that the “Peak P/E ratio” investor (bought before the dotcom bubble burst) would have earned a compound annual growth rate (CAGR) of about 6.3% vs 8.9% for an investor who bought at a more reasonable P/E ratio in August 2002. This difference is close to the difference between investing from 2002-2025 in wired U.S. (9%) vs. tired Europe (5.7%).
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