Tests of CAPM with Nonstationary Beta

Ho-Chuan Huang ()

International Journal of Finance & Economics, 2001, vol. 6, issue 3, 255-68

Abstract: Conventional tests of capital asset pricing model usually assume that beta, a measure of the systematic risk, is stable over time. Nonetheless, empirical investigations generally find that beta, tends to be volatile over time. This paper formulates novel empirical models for testing the capital asset pricing model (CAPM) by allowing beta to be drawn from two distinct regimes, or to be time varying. The econometric method via the Gibbs sampler with data augmentation algorithm is applied to the data from Taiwan Stock Market to estimate and test the model. Copyright @ 2001 by John Wiley & Sons, Ltd. All rights reserved.

Date: 2001
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