SPIVA® (S&P Indices Versus Active) is S&P Dow Jones Indices’ comprehensive, semi-annual research report comparing the performance of actively managed funds across categories (large cap, mid cap, small cap, international, fixed income) against their relevant passive benchmark indices. The SPIVA research has produced one of the most consistent findings in empirical finance: the majority of active managers underperform their passive benchmark over virtually every time horizon longer than one year.

The Core SPIVA Finding

Over any 15-year period, approximately 85-90% of actively managed equity funds have underperformed the S&P 500 on a net-of-fees basis. The underperformance rate is lower over 1-year periods but increases consistently as the time horizon extends — suggesting that short-term active management success is more likely to reflect luck than skill, while long-term performance most reliably separates genuine skill from fortunate timing. The SPIVA data has been the primary empirical support for the shift toward passive index investing.

What SPIVA Measures — and What It Doesn’t

SPIVA measures relative performance against a benchmark index, net of fees. This captures the most important question for benchmark-constrained active managers: do they beat the index they’re compared to? But it does not address the more relevant question for wealth-building investors: do they produce better absolute risk-adjusted returns — specifically, better returns with meaningfully smaller drawdowns? A strategy that “underperforms” the S&P 500 by 2% annually while producing only half the maximum drawdown may create substantially more wealth for investors who cannot endure full-market drawdowns without behavioral capitulation.

The Active Management Challenge

The SPIVA finding reflects several structural disadvantages facing active managers: fees paid to the manager, transaction costs of active trading, the difficulty of consistently identifying mispricings in competitive markets, and the mathematical impossibility of all active managers simultaneously outperforming the index (active management is a zero-sum game in aggregate). The managers who succeed long-term — those with genuine, durable edges — are a small minority that are difficult to identify in advance.

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