Why Value, Quality, and Momentum Belong Together

Key Points

  • The Research Affiliates systematic active equity investment process integrates three key signals (value, quality, and momentum) to form a more comprehensive framework for security selection and portfolio construction.

  • Value, quality, and momentum are economically distinct and imperfectly correlated. This diversification of alpha sources can improve robustness across regimes.

  • The resulting investment process is designed to be robust across environments, resilient to behavioral pitfalls, and grounded in economic intuition.

  • Smoother performance, shallower drawdowns, and greater adaptability increase the likelihood that investors can maintain discipline through full market cycles.

Introduction: One Signal Is Never Enough

Investing is an exercise in decision making under uncertainty. No single signal—no matter how intuitive or well supported by history—captures the full complexity of markets. Prices reflect expectations, expectations change, and investors themselves are prone to systematic errors. The challenge for a long-horizon, fundamentally driven investor is not to find the perfect signal but to assemble a process that is robust across environments, resilient to behavioral pitfalls, and grounded in economic intuition.

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This philosophy sits at the heart of the Research Affiliates systematic active equity investment process. Rather than relying on a single dimension of information, we integrate value, quality, and momentum—three signals that are individually powerful, economically intuitive, and (crucially) complementary. Used together, they have the potential to form a more comprehensive and reliable framework for security selection and portfolio construction than any one signal could achieve on its own.