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Multivariate test of Sharpe-Lintner CAPM with time-varying beta

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  • P.-S. Wu
  • J.-S. Chiou

Abstract

This study considers two important features of most time series analysis, i.e. nonlinearity and time-varying risk, to test the validity of Sharpe-Lintner Capital asset pricing model (CAPM). By using data on BM- and size-sorted quintile portfolios, this study resolves the problem of error-in-variables by estimating the firm-specific betas, of which the Kalman filter and the betas obtained from based-sectional analysis are used. From pooled data, this study finds time variance in the systematic risk for certain portfolios. Additionally, the proposed model rejects the Shape-Lintner CAPM. Firm BM(size) appears to be the reason for the rejection of CAPM and firm earnings in excess of predicted CAPM appear to increase(decrease) with bigger(smaller) BM(size).

Suggested Citation

  • P.-S. Wu & J.-S. Chiou, 2007. "Multivariate test of Sharpe-Lintner CAPM with time-varying beta," Applied Financial Economics Letters, Taylor and Francis Journals, vol. 3(5), pages 335-341.
  • Handle: RePEc:taf:apfelt:v:3:y:2007:i:5:p:335-341
    DOI: 10.1080/17446540701206584
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