State Street Investment Management
May 19, 2026
Consistency as a Compass in Developed Market Equities
Macro ThematicEquitiesOther
This report argues that Information Ratio (IR) is the superior metric for evaluating manager skill in developed market equities. It demonstrates that lower-risk 'Enhanced' core strategies offer more consistent, efficient, and predictable alpha than high-tracking-error strategies.
Key Takeaways
- 1.Information Ratio (IR) is the most effective measure of manager skill for benchmark-relative performance, capturing excess return per unit of active risk.
- 2.Selecting managers based on top-quartile returns is unreliable; only 9% of top-quartile managers from 2021 remained in the top quartile by 2025.
- 3.Efficiency decreases as risk increases; lower-risk 'Enhanced' strategies deliver significantly higher average Information Ratios than 'Highly Active' strategies.
Table of Contents
- First, Information Ratio—What is it?
- Manager selection is difficult
- Instead, focus on IR
- Core exposure offers the most stability
- Targeting the most rewarding risk segment
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Authors
Timothy J Herlihy
Securities
MSCI World Index
Themes
Information Ratio vs. Raw Excess ReturnsAlpha Decay with Increasing Active RiskCore style stability vs Style timing
Regions
Global
