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Are Index Funds really as good as “experts” claim?
Comparing index funds to long-term investments in individual companies? A counterintuitive study by Jeremy Siegel addressed a similar question: Would you be better off sticking with the original 500 stocks in the S&P 500, or like an index fund, changing your investments as the index is changed? The study: "Long-Term Returns on the Original S&P 500 Companies" Siegel found that the original 500 (including spinoffs, mergers, etc.) would do slightly better than a changing index. This is likely because the original 500 companies take on a value (rather than growth) aspect as the decades pass, and value stocks outperform growth stocks. Index funds' main strength may be in the behavior change they induce in some investors. To the extent that investors genuinely set-and-forget their index fund investments, they far outperform the average investor who mis-times the market. The average investor enters and leaves the market at the worst times, underperforming by a few percentage points each year on average. This buying-high and selling-low timing behavior damages long-term returns. Paying active management fees (e.g. 1% per year) makes returns worse. Returns compound on themselves, a great benefit to the investor. Fees also compound, to the benefit of someone other than the investor. Paying 1% annually to a financial advisor may further dent long-term returns. But Robert Shiller notes that advisors can dissuade investors from market timing. For clients who will always follow advice, the 1% advisory fee is worth it.