Buffett’s longtime playbook gets new attention as one S&P 500 index fund claims a multi-fold gain

Warren Buffett’s investment advice has resurfaced in market commentary, again centering on the idea that many investors may do best by avoiding the constant hunt for winners and instead owning a diversified, low-cost portfolio tied to the U.S. stock market. The renewed focus comes from a Yahoo Finance report distributed by TheStreet that frames Buffett’s “favorite” approach as a simple strategy: buy an S&P 500 index fund, keep costs low, and remain patient over time.

The article argues that the track record of a widely used S&P 500 index fund underscores why Buffett has preferred broad market exposure to concentrated stock-picking for most individuals. In the piece, the fund cited is Vanguard’s S&P 500 ETF, known as VOO. The description in the report points to strong performance over a 10-year window, describing returns large enough to “quadruple” an investor’s money over that period.

Rather than focusing on a specific stock catalyst or short-term market timing, the report’s message is that returns largely reflect the market’s overall growth, amplified by the compounding effect of staying invested. It also emphasizes the role of fees and the friction of active decision-making. In this framing, index investing becomes less about forecasting and more about durability: allowing a broad portfolio to participate as the economy grows and corporate earnings expand.

While the report discusses the “favorite fund” concept in Buffett terms, it does not, in the brief market framing, lay out a detailed, primary-source trail showing exactly how Buffett characterized that particular vehicle at each point in time. It also does not provide a full methodology for comparing periods, including dividend reinvestment assumptions, tax considerations, or whether results are presented in price return or total return terms. Those details matter because index ETF performance can vary depending on the accounting of distributions and the exact start and end dates used.

Berkshire Hathaway, the investment firm Buffett leads, remains the closest public institution to his model of compounding wealth through patient ownership. Berkshire’s own investment style combines long-term company ownership with a willingness to hold market exposure through different channels. But the specific claim highlighted by the market article is about an individual investor’s behavior, not Berkshire’s fund lineup.

For investors, the broader takeaway is behavioral as much as it is statistical. The report suggests that the biggest enemy is often the temptation to chase new narratives or react to drawdowns, which can interrupt compounding just when long-term gains are building. The article’s emphasis on “leave it alone” aligns with Buffett’s repeated public messaging that time in the market tends to matter more than constant tinkering for most people.

Still, caution is warranted in how the advice is operationalized. Even when long-term results are impressive, they do not guarantee future outcomes, and market cycles can produce extended periods where index funds do not deliver the same level of returns. The market piece also does not address investor-specific constraints like liquidity needs, concentration of other assets, or differing tax situations, all of which can change the suitability of a single broad-market position.