One of the potential advantages of indexing is its typically lower cost relative to active management. Investors have benefited substantially by saving on fees. And as indexing has expanded across asset classes, these rewards have compounded, especially in fixed income, where fees can prove more influential.
In Exhibit 1, we see that index mutual fund expense ratios in the U.S. have been consistently lower than their active counterparts for the past couple of decades. Although that spread has narrowed in recent years, we still observe a fee differential of 60 bps across equities and 41 bps across bonds as of 2023.

In addition to fee savings, index-tracking investors may have also benefited by avoiding active underperformance. Particularly germane to the equity markets, our SPIVA® Scorecards show that only a handful of actively managed mutual funds have outperformed the benchmark. But how do we account for institutional investors who, unlike retail investors, claim an advantage in selecting skillful asset managers coupled with a better vantage point to negotiate fees?
Our SPIVA Institutional Scorecard seeks to shed light on these questions, providing coverage of the performance of institutional accounts along with mutual fund data from the flagship SPIVA U.S. Scorecard. Exhibit 2 plots the differential in 10-year underperformance rates between institutional accounts versus mutual funds on both a net and gross-of-fees basis.
The chart illustrates several notable observations. First, long-term net-of-fees performance for institutional accounts was better compared to mutual funds in 20 out of 21 reported equity segments, with International Small-Cap Funds a noticeable outlier. Second, gross-of-fees relative performance for institutional accounts was better for 17 out of 21 equity categories. Third, except for a few categories, differences between mutual fund and institutional account underperformance rates were generally negligible, with majority underperformance for institutional accounts across all categories, on both a gross and net-of-fees basis.

While long-term results may slightly favor institutional accounts versus mutual funds, results can vary over the short term. In our most closely watched category, All Large-Cap Funds, 66% of institutional accounts underperformed the S&P 500® in 2023, worse than the 60% rate we observed for active large-cap mutual funds. Consistent 10-year majority underperformance rates across categories highlight the challenges of outperformance and show that institutional investors are no exception to the rule. Find out more about how institutional equity and fixed income managers fared last year in our SPIVA Institutional Year-End 2023 Scorecard.
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