S&P 500 index funds may underperform in the next decade due to high CAPE ratio of 35.7.

The S&P 500 index funds may not perform well in the coming decade due to high market valuation. Professor Michael Finke's analysis shows that the Shiller cyclically-adjusted price-to-earnings ratio (CAPE) can explain 90% of the S&P 500's returns for the next decade. The current CAPE ratio of 35.7 is the highest since 1929, indicating estimated annualized returns of 3% over the next decade. This is below the 10.9% annualized return since 2008 and 3.89% risk-free yield of 10-year Treasury notes.

August 18, 2024
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