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Title: The Low-Minus-High Portfolio and the Factor Zoo

Author(s): Daniel Andrei, Julien Cujean and Mathieu Fournier

Publication Date: November 2019

Keyword(s):

Programme Area(s): Financial Economics

Abstract: Regardless of whether the CAPM is rejected for valid reasons or by mistake, a single long-short portfolio will always explain, together with the market, 100% of the cross-sectional variation in returns. Yet, this portfolio, which we coin the "Low-Minus-High (LMH) portfolio," need not proxy for fundamental risk. We show theoretically how factors based on valuation ratios (e.g, book-to-market), or on investment rates, can be proxies for the LMH portfolio. More generally, the empiricist can uncover an infinity of proxies for the LMH portfolio, thus unleashing the factor zoo.

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Bibliographic Reference

Andrei, D, Cujean, J and Fournier, M. 2019. 'The Low-Minus-High Portfolio and the Factor Zoo'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=14153