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Next filing · Form 10-Q · Q2 2026 · 37 daysMethodology Paper · Part III published: The One Manager Skill That PersistsAPI Update · Point-in-Time (PIT) historical commit tracking — securities and funds unifiedAPI Update · ERM3 L3 variance partition — institutional transparency releasePart 3 · The Persistence of Stock-Selection ResidualsPart 1 · One Position, Four BetsNext filing · Form 10-Q · Q2 2026 · 37 daysMethodology Paper · Part III published: The One Manager Skill That PersistsAPI Update · Point-in-Time (PIT) historical commit tracking — securities and funds unifiedAPI Update · ERM3 L3 variance partition — institutional transparency releasePart 3 · The Persistence of Stock-Selection ResidualsPart 1 · One Position, Four Bets
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Academic reference · Idiosyncratic Risk and Active Share

Cremers et al. (2009)

Cremers, K. J. M., & Petajisto, A. (2009). How active is your fund manager? A new measure that predicts performance. Review of Financial Studies, 22(9), 3329–3365.

Why it matters

Active Share is a central complement to tracking-error analysis when evaluating whether reported active management is economically meaningful.

Read at publisher ↗All references
← Roll (1988)Idiosyncratic Risk and Active Share · 1 / 3Ang et al. (2006) →
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