DoubleChecks

What was claimed

The S&P 500 is now at its most overvalued level in history, even surpassing the 2000 dot-com bubble. Last time this happened, it crashed over -70%.

Our verdict

Inaccurate

Available reports say current CAPE readings are below the dot-com peak, which reached roughly 44, while current readings are reported around 41–42.5. Other valuation measures also place current market valuations below dot-com-era extremes. The S&P 500 fell approximately 49% from its 2000 peak to its 2002 low. A decline exceeding 70% describes some individual technology stocks, not the S&P 500 itself.

Combined assessment19 sourcesChecked Oct 17, 2026

Why this verdict

  • The S&P 500 has surpassed the 2000 dot-com bubble valuation level.

    Incorrect
    One assessment reached this conclusion

  • The last time this happened, the S&P 500 crashed over 70%.

    Incorrect
    All assessments reached this conclusion

  • The S&P 500 is now at its most overvalued level in history, even surpassing the 2000 dot‑com bubble.

    Misleading
    One assessment reached this conclusion; one differed·ChatGPT: Incorrect

Evidence reviewed

19 sources

Perplexity, Claude and ChatGPT sources are combined here.

finance.yahoo.comfinance.yahoo.comtheglobeandmail.comfinance.yahoo.comreuters.comaol.commarkets.businessinsider.comfidelity.comfinance.yahoo.comfinance.yahoo.com

Individual assessments

Assessment summary

  • The claim is partly supported but materially exaggerates the evidence.
  • The S&P 500’s CAPE ratio is reportedly near historic extremes, but available sources place it below the dot-com peak, and the 2000–2002 S&P 500 decline was about 49%, not over 70%.finance.yahoo.com finance.yahoo.com theglobeandmail.com

Claims reviewed

The S&P 500 has surpassed the 2000 dot-com bubble valuation level.

Incorrect
Available reports say current CAPE readings are below the dot-com peak, which reached roughly 44, while current readings are reported around 41–42.5.finance.yahoo.com finance.yahoo.com Other valuation measures also place current market valuations below dot-com-era extremes.reuters.com fidelity.com

This claim may mislead readers without added context.

The last time this happened, the S&P 500 crashed over 70%.

Incorrect
The S&P 500 fell approximately 49% from its 2000 peak to its 2002 low.finance.yahoo.com theglobeandmail.com markets.businessinsider.com A decline exceeding 70% describes some individual technology stocks, not the S&P 500 itself.reuters.com

This claim may mislead readers without added context.

The S&P 500 is now at its most overvalued level in history.

Misleading
The CAPE ratio is at or near historically extreme levels, but reports differ and generally place it below the 1999–2000 dot-com peak.finance.yahoo.com finance.yahoo.com Valuation depends on the metric used, so “most overvalued in history” is too absolute.

This claim may mislead readers without added context.

Assessment summary

  • The statement contains a significant factual error and a misleading claim.
  • Current S&P 500 valuations are at their second-highest level in history, not the highest, and the dot-com crash resulted in approximately a 49% S&P 500 decline, not over 70%.
  • The 70% figure appears to conflate the S&P 500 with the NASDAQ.</reasoning> <parameter name="claims">[ { "claim": "The S&P 500 is now at its most overvalued level in history, even surpassing the 2000 dot-com bubble", "assessment": "MISLEADING", "confidence": 0.95, "explanation": "Current CAPE ratio of ~42 is the second-highest on record, below the 1999 peak of 44.2.
  • The claim that valuations 'surpass' the dot-com bubble is factually inaccurate." }, { "claim": "Last time this happened, it crashed over -70%", "assessment": "FALSE", "confidence": 0.98, "explanation": "The S&P 500 declined approximately 49% from March 2000 to October 2002 during the dot-com crash, not over 70%.

Assessment summary

  • Both major numerical claims are incorrect.
  • Current long‑run valuation measures are very high but generally below the dot‑com peak, and the dot‑com peak did not precede a >70% S&P 500 drop.

Claims reviewed

The S&P 500 is now at its most overvalued level in history, even surpassing the 2000 dot‑com bubble.

Incorrect
Standard long‑run measures (Shiller CAPE) show readings near the dot‑com era but below its December 1999 peak of about 44.2; recent CAPE readings are typically reported around ~40–42, not higher than 44.2. econ.yale.edu whitehouse.gov

This claim may mislead readers without added context.

Last time this happened, it crashed over -70%.

Incorrect
The S&P 500 peak‑to‑trough decline after the 2000 dot‑com peak was roughly −45% to −50% (peak Aug/Sep 2000 to trough 2002/2003), not >70%; the much larger ~70%+ collapses are associated with 1929/Great Depression (and different measures), not the 2000 episode. dqydj.com historyofmarket.com

This claim may mislead readers without added context.

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