John Bogle on Common Investor Mistakes

In a 2014 interview with AAII Journal, Vanguard founder John Bogle outlined common investor mistakes and other thoughts about the market. Here are some highlights: “The biggest mistake investors make is looking backward at performance and thinking it’ll recur in the future,” says Bogle, citing the importance of reversion to the mean. “The winners in decade one tend to be the losers in decade two,” he says, and vice versa. Considering returns in “nominal dollars.” Investors, he says, should account for inflation and fund expenses when evaluating investment income. “Indexing works,” he says, “because the math is correct, and that’s […]