Does Warren Buffett Know Something Wall Street Doesn't? He Just Delivered a Fresh Warning and Here's What It Means for Investors.

Key Points

Warren Buffett has proven his expertise over the long run, delivering market-beating returns.

The billionaire shared some valuable words during the Berkshire Hathaway annual meeting this past weekend.

• 10 stocks we like better than S&P 500 Index ›

Investors always stop and take notice when Warren Buffett speaks about the stock market. There's one simple reason for this: The billionaire, who guided Berkshire Hathaway's investment decisions for 60 years, over that time delivered market-beating returns. While the S&P 500 posted a compounded annual gain of about 10%, Berkshire Hathaway's return topped 19%.

So Buffett has proven a clear understanding of the market and the ability to make wise long-term investing decisions -- even during tough times.

Will AI create the world's first trillionaire? Our team just released a report on the one little-known company, called an "Indispensable Monopoly" providing the critical technology Nvidia and Intel both need. Continue »

Today, Buffett no longer holds the chief executive officer role at Berkshire Hathaway -- he turned that over to Greg Abel at the start of this year – but the investing giant remains chairman of the holding company and still is involved to some degree in the investing process. This past weekend, for the first time, Buffett didn't take a spot on the stage at the Berkshire Hathaway annual meeting -- but he did claim a seat in the front row of the directors' section.

And during this major event, the investing giant delivered a fresh warning to Wall Street. Let's consider what it means for you as an investor.

Buffett's recent moves

First, it's important to consider the investing backdrop today as well as Buffett's moves over the past several quarters. The S&P 500 pushed higher in the bull market over three years, delivering a 78% increase through the end of December. And the star of the show has been the artificial intelligence (AI) stock. Investors have poured into AI companies, with great optimism about the technology's potential to overhaul how many tasks are done.

AI has the power to help companies become more productive and innovative -- and this should boost the earnings performance of these users of AI. The developers and sellers of AI are already benefiting, bringing in billions of dollars in revenue and profit. This helped technology stocks to soar, driving this bull market.

Against this backdrop, Buffett hasn't been a major buyer of stocks -- in fact, he's been a net seller for more than a dozen quarters. And he's helped Berkshire Hathaway build up a record pile of cash. This might have been seen as a warning, suggesting that it may not be the best time to rush into stocks.

And what happened next? Earlier this year, headwinds emerged in the market -- from geopolitical and economic uncertainties to worries about the AI revenue opportunity -- and this weighed on many growth players and the major benchmarks in the first quarter. But the positive momentum returned in April. Investors regained optimism about the long-term picture amid the ceasefire in Iran and positive earnings reports from tech giants.

Buffett's latest warning

Now, as indexes resume this positive direction, let's return to Buffett and his latest comments on the investing environment. In an interview with CNBC at the Berkshire Hathaway annual meeting, he delivered a fresh warning:

"We've never had people in a more gambling mood than now," he said during the interview. "But that doesn't mean that investing is terrible. It does mean that prices for an awful lot of things will look very silly."

One powerful metric supports Buffett's comment, and that's the S&P 500 Shiller CAPE ratio, an inflation-adjusted look at stock price in relation to earnings per share. Earlier this year, it reached a level it's only reached once before in history -- during the dot-com bubble -- and it remains close to this record level today. This shows that stocks, overall, are historically expensive.

Here's what Buffett knows

So, does Buffett know something Wall Street doesn't? Well, while some individuals are focusing on short-term trading, Buffett recognizes that buying stocks at excessively high valuations generally isn't the best move for the long-term investor.

Considering this, should you really buy stocks now? And this brings us back to Buffett's actions in recent quarters. As mentioned, Berkshire Hathaway hasn't heavily invested in stocks -- but this doesn't mean it has stayed out of the market. Buffett and Abel, in any market environment, are still on the lookout for specific buying opportunities.

For example, in the fourth quarter of last year, Buffett opened a position in The New York Times and added to his position in Domino's Pizza.

So, yes, Buffett is delivering a fresh warning, and it's this: Don't rush into stocks at any price. It's important to be selective and pick up players trading at reasonable levels -- and in the current market, opportunities may not be around every corner. But as Buffett demonstrated through his recent purchases, investors might find entry points during any market environment. He even noted, as mentioned above, that investing today isn't exactly "terrible." And that's why, like Buffett, you can score a long-term win by investing wisely -- even during difficult markets.

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 $496,473! Or when Nvidia made this list on April 15, 2005... if you invested $1,000 at the time of our recommendation, you’d have $1,216,605!

Now, it’s worth noting Stock Advisor’s total average return is 968% — a market-crushing outperformance compared to 202% 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.

**Stock Advisor returns as of May 4, 2026. *

Adria Cimino has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Berkshire Hathaway, Domino's Pizza, and The New York Times Co. The Motley Fool has a disclosure policy.

The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc.