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Exploring Return Dynamics via Corridor Implied Volatility

Torben Andersen (), Oleg Bondarenko and Maria T. Gonzalez-Perez ()

Review of Financial Studies, 2015, vol. 28, issue 10, 2902-2945

Abstract: Some fundamental questions regarding equity-index return dynamics are difficult to address due to the latent character of spot volatility. We exploit tick-by-tick option quotes to compute a novel "Corridor Volatility" index which may serve as an observable proxy for short-term volatility. Exploiting this index, we find that equity-index volatility jumps are common, symmetrically distributed, and cojump with the underlying returns. Moreover, the return-volatility asymmetry is more pronounced than is generally recognized and is in force for both diffusive and jump innovations in volatility. Finally, the index performs admirably during turbulent market conditions, constituting a useful real-time gauge of market stress.

Date: 2015
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