Warren Buffett’s Favorite Valuation Metric and Real Returns
by Glenn Busch on August 29, 2011
According to the website Pragmatic Capitalism, Warren Buffett’s favorite valuation metric is the market value of all tradable equities as a percentage of U.S. GNP, a similar valuation metric to Tobin’s Q.
To recreate this metric I used the Market Value of Equities from the Federal Reserve Flow of Funds Report and the most recent GNP measurement from the St. Louis Federal Reserve Bank’s FRED program. The chart below shows where this metric stands as of Q1 2011, the most recent Flow of Funds report.

Warren Buffett’s favorite metric also has similar drawbacks to Tobin’s Q: it is not a timing mechanism, it is not an alpha generator, the measurement itself has a time lag.
The strength of this metric is as a tool to measure potential real long-term returns. When equity as a percentage of GNP is above-average then total real returns for U.S. equities have a high probability of being below average. When equity as a percentage of GNP is below-average then total real returns for U.S. equities have a high probability of being above-average.
The first chart combines the 10 year annualized total real returns for the S&P 500 from Professor Shiller’s website with the chart above.

The second chart below highlights the 5 year annualized total real returns and Equity as a percentage of GNP.

Based on the equity value as a percentage of GNP, the probability that U.S. equity investors experience below-average annualized real returns over the next 5-10 years is high.
Related posts:
- Robert Shiller’s PE Ratio & Real Returns
- S&P 500 Real Returns and Tobin’s Q
- Stock Market Returns and Tobin’s Q
Warren Buffett’s Favorite Valuation Metric and Real Returns
by Glenn Busch on August 29, 2011
According to the website Pragmatic Capitalism, Warren Buffett’s favorite valuation metric is the market value of all tradable equities as a percentage of U.S. GNP, a similar valuation metric to Tobin’s Q.
To recreate this metric I used the Market Value of Equities from the Federal Reserve Flow of Funds Report and the most recent GNP measurement from the St. Louis Federal Reserve Bank’s FRED program. The chart below shows where this metric stands as of Q1 2011, the most recent Flow of Funds report.
Warren Buffett’s favorite metric also has similar drawbacks to Tobin’s Q: it is not a timing mechanism, it is not an alpha generator, the measurement itself has a time lag.
The strength of this metric is as a tool to measure potential real long-term returns. When equity as a percentage of GNP is above-average then total real returns for U.S. equities have a high probability of being below average. When equity as a percentage of GNP is below-average then total real returns for U.S. equities have a high probability of being above-average.
The first chart combines the 10 year annualized total real returns for the S&P 500 from Professor Shiller’s website with the chart above.
The second chart below highlights the 5 year annualized total real returns and Equity as a percentage of GNP.
Based on the equity value as a percentage of GNP, the probability that U.S. equity investors experience below-average annualized real returns over the next 5-10 years is high.
Related posts: