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IN-SAMPLE ASYMPTOTICS AND ACROSS-SAMPLE EFFICIENCY GAINS FOR HIGH FREQUENCY DATA STATISTICS

Published online by Cambridge University Press:  23 July 2021

Eric Ghysels*
Affiliation:
University of North Carolina
Per Mykland
Affiliation:
University of Chicago
Eric Renault
Affiliation:
University of Warwick
*
Address correspondence to Eric Ghysels, Department of Economics, University of North Carolina, Gardner Hall CB 3305, Chapel Hill, NC 27599-3305, USA; e-mail: eghysels@unc.edu.

Abstract

We revisit in-sample asymptotic analysis extensively used in the realized volatility literature. We show that there are gains to be made in estimating current realized volatility from considering realizations in prior periods. The weighting schemes also relate to Kalman-Bucy filters, although our approach is non-Gaussian and model-free. We derive theoretical results for a broad class of processes pertaining to volatility, higher moments, and leverage. The paper also contains a Monte Carlo simulation study showing the benefits of across-sample combinations.

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Type
ARTICLES
Copyright
© The Author(s), 2021. Published by Cambridge University Press

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