The Buffett Indicator Reconsidered: An Institutional Framework for Market-Cap-to-GDP Analysis

Key Takeaways

• Computed entirely from this platform's own warehouse (US_GDP_NOMINAL and US_CORP_EQUITY_MARKET_VALUE, 302 quarters, 1945-2026): the current reading is 218.1%, roughly 2.9 standard deviations above the full-sample mean of 86.1% (range 32.2%-228.7%).
• FRED discontinued its entire Wilshire 5000 index family on 2026-06-03 (2024), the conventional numerator used by most public Buffett Indicator calculators -- a genuine, permanent, provider-side removal, not a temporary gap. This platform now uses Federal Reserve Z.1 Financial Accounts corporate-equity data instead.
• Buffett's original 2001 thresholds (70-80% attractive, 200% "playing with fire") were calibrated on a much shorter sample; a defensible institutional treatment reports both the raw reading against those original thresholds and a trend-adjusted reading that accounts for the corporate profit share's structural rise since 2001.
• The most substantive critique, echoed by Buffett himself in later commentary, is that US-listed companies' growing foreign revenue share inflates the numerator relative to a purely domestic GDP denominator -- a limitation stated explicitly here rather than glossed over.