Semivariance Decomposition of Country-Level Returns
Posted: 4 Oct 2011
Date Written: October 1, 2011
A methodology for decomposing the below-mean semivariance into systematic and unsystematic components is introduced. The decomposition of variance and semivariance of asset returns is presented for forty-four country-level indexes. The proportion of risk explained for country-level returns in the Downside CAPM framework is higher than in the CAPM framework. On average for all markets, global systematic risk, as a proportion of total risk, is 42% in the CAPM and 56% in the Downside CAPM. A strong role for semivariance and downside beta is found in explaining the cross-section of country returns. Although skew is highly correlated to semivariance, no cross-sectional confirmation of the role of skew as a priced risk or in explaining the downside risk is identified.
Keywords: D-CAPM, Downside Risk, Semivariance Decomposition, Systematic Risk
JEL Classification: G15, G12
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