Is the Stock Market in a Bubble? Here’s What Warren Buffett’s Own Indicator — and His Cash Pile — Are Telling Us
Keith Speights, The Motley Fool
Mon, July 27, 2026 at 1:35 PM GMT+5:30
4 min read
- ^DJI
+0.46% - ^GSPC
+0.05% - NVDA
-0.92%
On the surface, nearly everything looks good for the stock market these days. Both the Dow Jones Industrial Average (DJINDICES: ^DJI) and the S&P 500 (SNPINDEX: ^GSPC) are near all-time highs. Corporate earnings continue to grow. The artificial intelligence (AI) boom remains a strong tailwind
However, many investors have a nagging question: Is the stock market in a bubble? Warren Buffett, the man whose investing prowess earned him the nickname “the Oracle of Omaha,” could have an answer
Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a “Double Down” signal flashed for a little-known chipmaker called Nvidia. For the first time in years, that same “Total Conviction” signal is flashing for a company 1/100th the size of Nvidia. Continue »
To be sure, Buffett hasn’t publicly stated that he believes the stock market is in a bubble. But the valuation indicator bearing his name and his Berkshire Hathaway (NYSE: BRKA) (NYSE: BRKB) cash stockpile appear to be telling us that it is
“Playing with fire”
Let’s go back to early 2000. A frenzy over the promise of the Internet has driven the stock market to record highs. Then the dot-com bubble burst, and the S&P 500 sank more than 40% over two years. The tech-heavy Nasdaq-100 plunged more than 80% from its peak
Buffett wasn’t taken by surprise. He explained in a 2001 Fortune article that the ratio of the market caps of all publicly traded companies to U.S. gross national product (GNP) had reached “an unprecedented level” by late 1999 and early 2000. Buffett added, “That should have been a very strong warning signal.”
This ratio became known as the “Buffett indicator.” Gross domestic product (GDP), which measures economic output within the nation’s borders, was swapped out for GNP, which measures the economic output of its citizens everywhere
Buffett expressed his view in 2001 that if the indicator that bears his name approaches 200%, investors are “playing with fire.” The valuation metric set a record high in late 2021, topping 190%. The stock market entered a bear market the following year
Today, the Buffett indicator stands at 236%. Investors could be standing in the fire at that level if the “Oracle of Omaha” is right
Money talks — and a mountain of money screams
You won’t hear Buffett say much about the ratio of total stock market cap to GDP these days. However, he has never backed away from his opinion stated more than two decades ago
What is talking, though, is the massive cash stockpile he and his successor as CEO, Greg Abel, have built for Berkshire Hathaway. The conglomerate’s cash and short-term investments now total more than $397 billion — the highest level in Berkshire’s history and the largest cash position of any U.S. company ever
