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Volatility components, leverage effects, and the return-volatility relations
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DOI：10.1016/j.jbankfin.2010.10.026.png)
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Abstract
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This paper investigates the risk-return trade-off by taking into account the model specification problem. Market volatility is modeled to have two components, one due to the diffusion risk and the other due to the jump risk. The model implies Merton's ICAPM in the absence of leverage effects, whereas the return-volatility relations are determined by interactions between risk premia and leverage effects in the presence of leverage effects. Empirically, I find a robust negative relationship between the expected excess return and the jump volatility and a robust negative relationship between the expected excess return and the unexpected diffusion volatility. The latter provides an indirect evidence of the positive relationship between the expected excess return and the diffusion volatility. (C) 2010 Elsevier B.V. All rights reserved.
Keywords:
Volatility components
Risk premia
Leverage effects
Return-risk trade-off
Bayesian methods
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