BM(book-to-market ratio) factor: medium-term momentum and long-term reversal

Liu Wei-qi () and Zhang Jingxing ()
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Liu Wei-qi: Shanxi university
Zhang Jingxing: Shanxi university

Financial Innovation, 2018, vol. 4, issue 1, 1-29

Abstract: Abstract To explain medium-term momentum and long-term reversal, we use the difference between the optional model and the CAPM model to construct a winner-loser portfolio. According to the CAPM model’s zero explanatory ability with respect to stock market anomalies, we obtain an anomaly interpretative model. This study shows that this anomaly interpretative model can explain stock market perceptions and medium-term momentum. Most importantly, BM is a critical factor in the model’s explanatory ability. We present a robustness test, which includes selecting new sample data, adding new auxiliary variables, changing sample years, and adding industry fixed effects. In general, the BM effect does have considerable explanatory power in medium-term momentum and long-term reversal.

Keywords: Stock market volatility; medium-term momentum; long-term reversal; holding period; formation period; book-to-market ratio; return on equity (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1186/s40854-017-0085-6

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