For decades, Warren Buffett, the CEO of Berkshire Hathaway, has maintained a singular piece of investment advice for the general public: invest in a low-cost S&P 500 index fund. During various shareholder meetings and in his annual letters to shareholders, Buffett has argued that most investors, including professionals, fail to outperform the broader market over long periods. By purchasing an index fund, an investor gains exposure to the 500 largest publicly traded companies in the United States, effectively betting on the long-term growth of the American economy rather than the success of a single firm.

Buffett’s preference for this strategy is rooted in the concepts of diversification and low management fees. He famously noted that high fees charged by active fund managers often erode the returns that investors would otherwise keep. In a notable 2007 bet, Buffett wagered that an S&P 500 index fund would outperform a collection of hedge funds over a ten-year period, a bet he ultimately won by a significant margin. While Berkshire Hathaway itself operates as a conglomerate that picks individual companies, Buffett has explicitly stated that for the average investor who lacks the time or expertise to analyze businesses, the index fund is the superior choice. This stance remains a cornerstone of his investment philosophy, emphasizing patience and the avoidance of unnecessary market speculation.