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Estimation of Leverage Effect: Kernel Function and Efficiency

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  • Xiye Yang

Abstract

This article proposes more efficient estimators for the leverage effect than the existing ones. The idea is to allow for nonuniform kernel functions in the spot volatility estimates or the aggregated returns. This finding highlights a critical difference between the leverage effect and integrated volatility functionals, where the uniform kernel is optimal. Another distinction between these two cases is that the overlapping estimators of the leverage effect are more efficient than the nonoverlapping ones. We offer two perspectives to explain these differences: one is based on the “effective kernel” and the other on the correlation structure of the nonoverlapping estimators. The simulation study shows that the proposed estimator with a nonuniform kernel substantially increases the estimation efficiency and testing power relative to the existing ones.

Suggested Citation

  • Xiye Yang, 2023. "Estimation of Leverage Effect: Kernel Function and Efficiency," Journal of Business & Economic Statistics, Taylor & Francis Journals, vol. 41(3), pages 939-956, July.
    • Handle: RePEc:taf:jnlbes:v:41:y:2023:i:3:p:939-956
    DOI: 10.1080/07350015.2022.2097910
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