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    題名: Reexamination of capital asset pricing model (CAPM): An application of quantile regression
    作者: Chang, Matthew C.;Hung, Jui-Cheng;Nieh, Chien-Chung
    貢獻者: 淡江大學財務金融學系
    關鍵詞: CAPM;quantile regression;nonlinear
    日期: 2011-12
    上傳時間: 2013-10-24 01:38:07 (UTC+8)
    出版者: Lagos: Academic Journals
    摘要: Capital asset pricing model (CAPM) plays a very important role in risky asset evaluation. This paper tries to explore the important aspect in CAPM, which is perfect linear relationship assumption between return and market portfolio risk and further discusses the application of CAPM. Empirical evidence shows that the model in ordinary least squares (OLS) supports the positive relationship between systematic risk and return. However, by quantile regression (QR) analysis, not all relationships between systematic risk and return are positive. For lower quantiles, the relationship is not significantly positive although the positive relationship is concluded for higher quantiles. To sum it up, it is not always sustainable for a positive relationship between systematic risk and return. Besides, non-parametric estimations show that the linear assumption between market portfolio risk and return in CAPM is suspicious. Therefore, we find that the two important associated assumptions, which are positive and linear relationships between market portfolio risk and return, do not necessarily exist.
    關聯: African Journal of Business Management 5(33), pp.12684-12690
    DOI: 10.5897/AJBM10.697
    顯示於類別:[財務金融學系暨研究所] 期刊論文

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