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The Journal of Portfolio Management

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Article

Fact, Fiction, and the Size Effect

Ron Alquist, Ronen Israel and Tobias Moskowitz
The Journal of Portfolio Management Fall 2018, jpm.2018.1.082; DOI: https://doi.org/10.3905/jpm.2018.1.082
Ron Alquist
is a vice president at AQR Capital Management in Greenwich, CT
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Ronen Israel
is a principal at AQR Capital Management in Greenwich, CT
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Tobias Moskowitz
is the Dean Takahashi professor of finance and economics at Yale University, a research associate at the NBER, and a principal at AQR Capital Management in Greenwich, CT
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The Journal of Portfolio Management: 49 (4)
The Journal of Portfolio Management
Vol. 49, Issue 4
Multi-Asset Special Issue 2023
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Fact, Fiction, and the Size Effect
Ron Alquist, Ronen Israel, Tobias Moskowitz
The Journal of Portfolio Management Oct 2018, jpm.2018.1.082; DOI: 10.3905/jpm.2018.1.082

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Fact, Fiction, and the Size Effect
Ron Alquist, Ronen Israel, Tobias Moskowitz
The Journal of Portfolio Management Oct 2018, jpm.2018.1.082; DOI: 10.3905/jpm.2018.1.082
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  • Article
    • Abstract
    • FICTION: THE SIZE EFFECT IS ONE OF THE STRONGEST DOCUMENTED ANOMALIES/FACTORS
    • FACT: THE SIZE EFFECT HAS DISAPPEARED OR WEAKENED SINCE ITS DISCOVERY
    • FICTION: THE SIZE EFFECT IS ROBUST TO HOW YOU MEASURE SIZE
    • FACT: THE SIZE EFFECT IS DOMINATED BY A JANUARY EFFECT
    • FICTION: THE SIZE EFFECT WORKS IN OTHER EQUITY MARKETS
    • FACT: THE SIZE EFFECT IS EITHER NOT APPLICABLE OR DOES NOT WORK FOR OTHER ASSET CLASSES
    • FACT: THE SIZE EFFECT MOSTLY COMES FROM MICROCAP STOCKS
    • FACT: THE SIZE EFFECT IS DIFFICULT TO IMPLEMENT IN PRACTICE
    • FICTION: THE SIZE EFFECT IS LIKELY MORE THAN JUST A LIQUIDITY EFFECT
    • FICTION: THERE IS A STRONG ECONOMIC STORY, EX LIQUIDITY, IN WHICH SMALL STOCKS SHOULD DESERVE A MARGINAL PREMIUM OVER THEIR OTHER RISK CHARACTERISTICS
    • FICTION: MANY ANOMALIES BEING STRONGER AMONG SMALL STOCKS IS EVIDENCE OF A SIZE EFFECT
    • FACT: OTHER FACTORS WORKING BETTER IN SMALL CAPS CAN BE A REASON TO BE OVERWEIGHT SMALL STOCKS EVEN THOUGH THERE IS NO PURE SIZE EFFECT
    • FACT AND FICTION: THE SIZE EFFECT IS MUCH STRONGER WHEN CONTROLLING FOR OTHER FACTORS
    • FACT: THE SIZE EFFECT RECEIVES DISPROPORTIONATELY MORE ATTENTION THAN OTHER FACTORS WITH SIMILAR OR MUCH STRONGER EVIDENCE
    • CONCLUSION
    • ACKNOWLEDGMENTS
    • ENDNOTES
    • REFERENCES
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