Buffett has been selling off stocks and amassing record levels of cash for several quarters.
His actions may inspire us to take valuable immediate steps to support the long-term growth of our portfolio.
10 stocks we like better than the S&P 500 ›
Warren Buffett has been sounding the alarm for some time. Twelve quarters to be exact. That’s the number of times the billionaire has net sold stocks in consecutive quarters, meaning he sold more than he bought. In addition, Buffett, as Chairman and CEO Berkshire Hathawayhas been accumulating cash to reach record levels — it topped $381 billion in the third quarter.
The famous investor didn’t explain the reasons for his move, but we can glean clues from his past comments and what we know about his investment strategy. For example, Buffett explained in last year’s letter to shareholders that buying opportunities are often not plentiful. “Often, nothing looks striking,” he writes. And, over time, Buffett has emphasized the importance of buying stocks at reasonable valuations, rather than paying overpriced simply because the stock is popular.
With all of this in mind, Buffett may be worried about rising stock valuations — which is why his warning to Wall Street has been deafening. With that in mind, here are three things you should do before 2026.
Image source: The Motley Fool.
As mentioned before, S&P 500 Index Valuations climbed, with the S&P 500’s Shiller CAPE ratio reaching 40, a level it has only reached once before. That’s an inflation-adjusted measure of stock prices versus earnings, and it shows stocks today are trading at one of their most expensive levels ever.
Investors are most worried about the price of artificial intelligence (AI) stocks. Some market participants have even suggested that an AI bubble may be forming, although earnings reports from AI companies may suggest otherwise – showing growth and continued demand.
It’s impossible to predict with 100% accuracy whether a bubble is coming, or whether AI stocks will continue to climb in the future. But in either case, if your portfolio is well diversified across stocks and industries, you’re likely to win. That way, even if one stock or sector slips, the others are likely to make up for it.
Now, as you think about your holdings and strategies heading into the new year, now is a good time to evaluate your portfolio—and if you’re lacking diversification and have cash to put to work, fix that. If high valuations lead to a decline in the stock market, a diversified portfolio may help you weather the storm.
Even though stocks have surged in recent years, that doesn’t mean buying opportunities don’t exist. Although Buffett mostly sold stocks during a few quarters, he also found some great deals — for example, in Q3, he took a position letterIt is one of the cheapest among the seven major technology stocks.
Therefore, it’s always important to look for good buying opportunities, even when the market is difficult or a stock looks expensive. You might buy a stock that has soared but has recently pulled back, which presents a new buying opportunity— core weaving I think about this, especially if you are an activist investor. Or you might turn to a potential recovery story, e.g. UnitedHealth Group — Buffett took a position in the health insurance giant in the second quarter.
Finally, if possible, it’s always a smart idea to set aside some cash that you can tap into when new buying opportunities arise. As Buffett’s moves every quarter show, even when sometimes he’s not a major buyer of stocks, he still manages to score some nice deals. It’s important to be prepared so you don’t miss out.
The level of cash you set aside depends on your budget, but the good news is that any amount can help get you on the path to wealth. So you don’t have to set aside thousands or billions of dollars to start investing or add to your current position, like Buffett did. If you invest wisely and regularly, you can do a lot with $100 or less. Over time, you may build up your cash reserves and gradually invest them as needed.
So if your budget allows, before the New Year, follow Buffett’s lead and set aside a small amount of cash to deploy at the appropriate moment in 2026.
Before buying S&P 500 stocks, consider the following factors:
this Motley Fool Stock Advisor The analytics team has just identified what they believe is 10 Best Stocks Investors can buy now… and the S&P 500 isn’t one of them. The 10 stocks selected could generate huge returns in the coming years.
consider when Netflix This list was created on December 17, 2004… If you invested $1,000 when we recommended, You will have $540,587!* or when NVIDIA This list was created on April 15, 2005… If you invested $1,000 when we recommended, You will have $1,118,210!*
Now, it’s worth noting stock advisor The overall average return is 991% — Outperformed the market compared to the S&P 500’s 195%. Don’t miss the latest top 10 list, available via stock advisorand join an investment community built by individual investors for individual investors.
See 10 stocks »
*Stock Advisor returns as of December 1, 2025
Adria Cimino has no position in any of the stocks mentioned. The Motley Fool owns and recommends Alphabet and Berkshire Hathaway. The Motley Fool recommends UnitedHealth Group. The Motley Fool has a disclosure policy.
Warren Buffett’s warning to Wall Street has reached deafening proportions: Three things you should do before 2026. Originally posted by The Motley Fool