· Event impact
S&P 500 Shiller CAPE Ratio Surpasses 41, Signaling Overvaluation
Transmission path
Mean reversion risk via equity risk premium compression against historical valuation ceilings.
Market mechanism
Mean reversion risk via equity risk premium compression against historical valuation ceilings.
Extended read
The Shiller CAPE ratio, which adjusts earnings for inflation over a 10-year period, suggests the market is significantly overvalued relative to historical norms. The current reading of 41 matches the peak seen in the late 1990s. While AI-driven growth in mega-cap tech has supported these levels, the concentration risk and valuation stretch increase sensitivity to macro shocks or earnings misses.
Exposed assets
SPY
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