Key takeaways
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Warren Buffett has pointed most investors toward long-term investing via the S&P 500 rather than stock picking.
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In his Berkshire Hathaway guidance, he specifically endorsed a very low-cost S&P 500 index fund and said, “I suggest Vanguard’s.”
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The Vanguard S&P 500 ETF has been presented as a practical vehicle for that approach, with an expense ratio of 0.03%.
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Regular contributions to a broad S&P 500 fund are projected to grow substantially over decades due to compounding.
Warren Buffett’s long-running view on how most investors should build wealth is centered on owning a broad slice of the U.S. market through the S&P 500. In guidance he shared with Berkshire Hathaway shareholders, Buffett recommended that money he leaves for his wife be invested with a “very low-cost S&P 500 index fund,” and he added: “I suggest Vanguard’s.”
The message is less about market forecasts and more about implementation: Buffett has argued that for many investors, the combination of diversification, low costs, and a long time horizon can be more durable than attempting to time markets or conduct extensive individual stock research.
What Buffett recommends—and why
Buffett’s approach for the general investing public is built around two principles: most investors are unlikely to consistently beat the market through timing, and most also do not have the time, expertise, or discipline required for ongoing, high-quality stock research. Instead, he has advocated a simple strategy that allows investors to participate in the growth of many of the largest and most established U.S. businesses through the S&P 500.
In the Berkshire Hathaway letter discussed in the article, Buffett described allocating the portfolio with 10% in short-term Treasuries and 90% in a low-cost index fund tracking the S&P 500. When asked which fund to use, he pointed to Vanguard.
Why the Vanguard S&P 500 ETF is used as the example
The article frames the Vanguard S&P 500 ETF as a direct way to put Buffett’s recommendation into practice. It notes that the ETF’s expense ratio is 0.03%, emphasizing that lower ongoing costs help investors keep more of the dividends and capital gains generated by the underlying index.
By buying one fund rather than selecting individual companies, investors gain exposure to a broad “basket” of the U.S. large-cap market. The article also argues that this kind of structure can reduce the need to constantly monitor whether an individual stock remains a good buy—because the investment premise is market participation rather than security selection.
How compounding could work over decades
The core numerical illustration in the article is based on the historical performance of the S&P 500. It cites roughly a 10% average annual return over the past century as a baseline expectation, while acknowledging that investors would have experienced multiple bear markets and major economic disruptions along the way.
Using that assumption, the article states that investing $100 per month into a Vanguard S&P 500 ETF could grow to roughly $226,000 over 30 years. It also highlights that contributions over that period would total about $36,000, with the remainder of the ending value attributed to investment growth and compounding.
Bigger picture for long-term investors
The article’s broader takeaway is that even in a market crowded with thousands of exchange-traded funds and index strategies, a plain S&P 500 allocation can be sufficient for investors focused on long-term wealth accumulation. It emphasizes that the S&P 500 is heavily weighted toward widely held U.S. businesses with long operating histories, and that the index’s track record has supported patient holding through volatility—provided investors are willing and able to stay invested during downturns.
For investors considering whether to buy the Vanguard S&P 500 ETF, the article also references an external set of stock picks from Motley Fool’s Stock Advisor service, stating that the ETF was not among the selected “best stocks.” It presents the service’s performance comparisons and notes that those returns are as of August 31, 2026, but it does not provide new market data or changes to the ETF’s fundamentals in the article itself.
Looking ahead, investors using a long-term S&P 500 approach generally watch the same macro variables that drive equity valuations: interest-rate expectations, inflation trends, and corporate earnings growth across major sectors. With no specific timing signal offered here, the main near-term checklist remains consistent contributions, maintaining a diversified allocation, and being prepared for market volatility while staying aligned with the multi-decade time horizon underlying Buffett-style index investing.
