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A two-phase approach to estimating time-varying parameters in the capital asset pricing model

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  • Yih Su
  • Jing-Shiang Hwang

Abstract

Following the development of the economy and the diversification of investment, mutual funds are a popular investment tool nowadays. Choosing excellent targets from hundreds of mutual funds has become more and more crucial to investors. The capital asset pricing model (CAPM) has been widely used in the capital cost estimation and performance evaluation of mutual funds. In this study, we propose a new two-phase approach to estimating the time-varying parameters of CAPM. We implemented a simulation study to evaluate the efficiency of the proposed method and compared it with the commonly used state space and rolling regression methods. The results showed that the new method is more efficient in most scenarios. Meanwhile, the proposed approach is very practical and it is unnecessary to judge and adjust the estimating process for different situations. Finally, we applied the proposed method to equity mutual funds in the Taiwan stock market and reported the performances of two funds for demonstration.

Suggested Citation

  • Yih Su & Jing-Shiang Hwang, 2009. "A two-phase approach to estimating time-varying parameters in the capital asset pricing model," Journal of Applied Statistics, Taylor & Francis Journals, vol. 36(1), pages 79-89.
    • Handle: RePEc:taf:japsta:v:36:y:2009:i:1:p:79-89
    DOI: 10.1080/02664760802443871
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    References listed on IDEAS

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