Is the Buffett Indicator Flashing a Warning Sign to Stock Market Investors?
Key Points
Some investors might be worried that U.S. stocks will perform poorly in the future.
This is especially after the fantastic run that markets have seen in the past decade.
Besides interest rates, the Buffett indicator doesn't account for overseas revenue.
- 10 stocks we like better than S&P 500 Index ›
A popular valuation metric -- known as the Buffett indicator -- measures total U.S. stock market capitalization relative to domestic GDP. It currently sit at 236%, which is essentially its highest level ever. This suggests that U.S. stocks are extremely overvalued.
Is this data point flashing a warning sign to stock market investors?
Missed AI’s "Act 1"? Act 2 Could Be 15x Bigger. Most investors think they missed the AI boat because they didn't buy Nvidia in 2005. But according to our analysts, we’re only at the end of "Act 1"—the R&D phase. "Act 2" is the global rollout. Continue »
Image source: Getty Images.
In the past decade, the S&P 500 index (SNPINDEX: ^GSPC) has produced a total return of 324% (as of Oct. 5). On an annualized basis, the 15.5% gain is significantly higher than the benchmark's historical 10% average.
It makes sense why some investors may be worried about the market's valuation these days. The Buffett indicator might hint at poor investment returns in the years ahead.
Investors should take the time to know this metric's limitations, though. It doesn't factor in foreign revenue generated by U.S. companies. Some of the largest technology enterprises, which have a huge weighting in the S&P 500 index, make a lot of money internationally. This artificially inflates the Buffett indicator's numerator.
The money supply has also ballooned in the past 10 years. That's a tailwind for equities since it results in more liquidity entering the financial system that can flow to stocks.
The takeaway for investors is to use the Buffett indicator to understand the current state of markets. But don't expect this to be a tool that helps you time your buy and sell decisions. Nothing beats putting money to work early and letting compounding take over.
Should you buy stock in S&P 500 Index right now?
Before you buy stock in S&P 500 Index, consider this:
The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and S&P 500 Index wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years.
Consider when Netflix made this list on December 17, 2004... if you invested $1,000 at the time of our recommendation, you’d have $375,887!* Or when Nvidia made this list on April 15, 2005... if you invested $1,000 at the time of our recommendation, you’d have $1,459,146!*
Now, it’s worth noting Stock Advisor’s total average return is 955% — a market-crushing outperformance compared to 215% for the S&P 500. Don't miss the latest top 10 list, available with Stock Advisor, and join an investing community built by individual investors for individual investors.
See the 10 stocks »
*Stock Advisor returns as of October 8, 2026.
Neil Patel has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.
Recommended Articles
