After more than 60 years at Berkshire Hathaway — and building it into a trillion-dollar empire — Warren Buffett leaves ordinary investors with exactly one product recommendation, unchanged for decades: buy a low-cost S&P 500 index fund and hold it. According to the Motley Fool, it is the only investment recommendation Buffett has ever made in his career. He has never recommended individual stocks.
Buffett was blunt at Berkshire's 2021 shareholder meeting: for most people, owning an S&P 500 index fund is the best thing to do. He said something similar at the company's first-ever virtual shareholder meeting in the weeks after the COVID-19 crash in 2020, adding that owning stocks is "fundamentally advantageous" and that he would "bet on America the rest of my life." The irony is thick: Berkshire shares compounded at 19.7% annually from 1965 to 2025 under Buffett — nearly double the S&P 500's 10.5% — yet he has always believed average investors cannot replicate that path.
The fullest version appeared in his 2013 letter to Berkshire shareholders, where he gave his estate's trustee instructions that could not be simpler: put 10% of the cash in short-term government bonds and 90% in a very low-cost S&P 500 index fund — "I suggest Vanguard's." As FinanceBuzz notes, this was the allocation he designed for his own wife: the most successful active investor of his generation chose the most passive plan for the person he most wanted to protect. Since then Buffett stepped down as Berkshire's CEO at the end of 2025 and handed over the chairmanship this year, yet the advice keeps circulating.
Buffett's reasoning is practical. The S&P 500 tracks 500 large U.S. companies across 11 sectors and covers roughly 80% of U.S. equity market value — effectively a snapshot of the American economy. Low cost is the point: the Vanguard S&P 500 ETF (VOO) charges just 0.03%, or $3 per $10,000 invested per year. And most people who try to beat the market end up underperforming it. S&P data show nearly 79% of U.S. large-cap active funds trailed the index over the past year; over 15 years, 90% lagged behind.
The numbers support the advice. Per the Motley Fool, $5,000 invested in Vanguard's S&P 500 ETF on the first trading day after Buffett's 2014-released letter would be worth about $20,465 today — $25,270 with dividends reinvested. Over the past decade the S&P 500 has gained roughly 255%, about 13.5% annualized, and its century-long average annual return is around 10%. In his November 2025 letter, Buffett also reminded readers that Berkshire stock has fallen roughly 50% three times in 60 years — and that America came back each time. Panic selling, he argues, is what converts volatility into actual loss.
Behind the recommendation lies a deeper message: don't try to time the market. As early as the 2013 letter, Buffett called forming macroeconomic opinions or listening to market predictions a waste of time. Analysts concede valuations and market concentration are at historic highs, so near-term turbulence is possible. But Buffett's complete argument is that non-professionals should not aim to pick winners — they should "own a cross-section of businesses that in aggregate are bound to do well." A low-cost S&P 500 index fund, he believes, achieves exactly that. In the end, the bet isn't on any single stock — it's on America's long-term economic growth.