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from-the-field-175x95px.jpgFROM THE FIELD: Robeco researchers publish many whitepapers based on their own empirical studies. But they also closely follow quantitative research done by others. Head of Quantitative Equities Research David Blitz comments on notable external papers.

From the field: Do fund flows cause the value and momentum effects?

25-05-2016 | Insight | David Blitz, PhD In this study the authors argue that the value and momentum effects may be the result of fund flows. They propose a model in which flows between investment funds are triggered by changes in fund managers’ efficiency, which investors either observe directly or infer from past performance.

They find that momentum arises if fund flows exhibit inertia, and because rational prices do not fully adjust to reflect future flows. A value (reversal) effect arises because flows push prices away from fundamental values.

Besides momentum and value effects, the model also predicts co-movement, lead-lag effects and amplification, with these being larger for high-idiosyncratic-risk assets. We like this study because it helps to rationalize the existence of the value and momentum effects, which are typically attributed to ‘irrational’ investor behavior.

* Vayanos & Woolley, 2013, “An Institutional Theory of Momentum and Reversal”, Review of Financial Studies, 26(5), pp. 1087-1145.
David Blitz

David Blitz, PhD

Head Quantitative Equities Research

“Factor investing, aimed at systematically capturing the value, momentum, low-volatility and other premiums, holds the future.”

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David Blitz, PhD
Head Quantitative Equities Research


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