Intelligence Feed event · Equity · 2026-10-13

    S&P 500 Shiller CAPE Ratio Reaches 41 Following 21% Annualized 4-Year Run

    Question

    S&P 500 Shiller CAPE Ratio Reaches 41 Following 21% Annualized 4-Year Run

    Direct answer

    Historical valuation data indicates the S&P 500 CAPE multiple has reached approximately 41, driven by four straight years of 21% annualized growth. This valuation territory has previously occurred only during the 1929 market peak and the 1999 dot-com era. The compressed equity risk premium leaves equity index valuations sensitive to any deceleration in corporate profit margins or persistent interest rate levels.

    Original publisher
    Market Ontology
    Evidence through
    2026-10-13
    Published
    2026-10-20
    Revision
    1 · 2026-10-20

    Cite as: Market Ontology, “S&P 500 Shiller CAPE Ratio Reaches 41 Following 21% Annualized 4-Year Run”, revision 1, evidence through 2026-10-13. https://marketontology.com/market-events/2026-10-13/s-p-500-shiller-cape-ratio-reaches-41-following-21-annualized-4-year-run-7e1f24

    EQUITY
    S&P 500 Shiller CAPE Ratio Reaches 41 Following 21% Annualized 4-Year Run
    Historical valuation data indicates the S&P 500 CAPE multiple has reached approximately 41, driven by four straight years of 21% annualized growth. This valuation territory has previously occurred only during the 1929 market peak and the 1999 dot-com era. The compressed equity risk premium leaves equity index valuations sensitive to any deceleration in corporate profit margins or persistent interest rate levels.
    SPY
    Impact
    80
    OCT 13
    SIG
    82%
    SPY
    S&P 500 Shiller CAPE Ratio Reaches 41 Following 21% Annualized 4-Year Run
    Historical valuation data indicates the S&P 500 CAPE multiple has reached approximately 41, driven by four straight years of 21% annualized growth. This valuation territory has previously occurred only during the 1929 market peak and the 1999 dot-com era. The compressed equity risk premium leaves equity index valuations sensitive to any deceleration in corporate profit margins or persistent interest rate levels.
    → Elevated Shiller CAPE at 41 compresses forward equity risk premia across SPY constituents, increasing equity sensitivity to real yields.
    Impact
    Historical valuation data indicates the S&P 500 CAPE multiple has reached approximately 41, driven by four straight years of 21% annualized growth. This valuation territory has previously occurred only during the 1929 market peak and the 1999 dot-com era. The compressed equity risk premium leaves equity index valuations sensitive to any deceleration in corporate profit margins or persistent interest rate levels.
    Affected
    SPY
    Transmission
    Elevated Shiller CAPE at 41 compresses forward equity risk premia across SPY constituents, increasing equity sensitivity to real yields.

    How this development reaches the affected companies

    AssetExposure and channelDirectionEvidence
    SPYequity multiple compression via elevated Shiller CAPEMixed1-3mS&P 500 CAPE ratio reached 41 after four years of 21% annualized growth.

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    What happened next

    AssetCallBase close+1 day+5 days+20 days
    SPYMixed778.01 2026-10-13-1.08%PendingPending

    Closing prices from stored daily bars; returns measured from the last close on or before the event date. Not a recommendation.

    No verifiable public source recorded for this card.

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