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Revisiting the intertemporal risk-return relation: asymmetrical effect of unexpected volatility shocks

Kiseok Nam, Joshua Krausz and Augustine C. Arize

Quantitative Finance, 2014, vol. 14, issue 12, 2193-2203

Abstract: We suggest that an unexpected volatility shock is an important risk factor to induce the intertemporal relation, and the conflicting findings on the relation could be attributable to an omitting variable bias resulting from ignoring the effect of an unexpected volatility shock on the relation. With the effect of an unexpected volatility shock incorporated in estimation, we find a strong positive intertemporal relation for the US monthly excess returns for 1926:12-2008:12. We also find a significant link between the asymmetric mean-reversion and the intertemporal relation in that the quicker reversion of negative returns is attributed to the negative intertemporal relation under a prior negative return shock.

Date: 2014
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