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November 2008 - Volume 76 Issue 6 Page 1481 - 1536


p.1481


Designing Realized Kernels to Measure the ex post Variation of Equity Prices in the Presence of Noise

Ole E. Barndorff-Nielsen
Peter Reinhard Hansen
Asger Lunde
Neil Shephard

Abstract

This paper shows how to use realized kernels to carry out efficient feasible inference on the ex post variation of underlying equity prices in the presence of simple models of market frictions. The weights can be chosen to achieve the best possible rate of convergence and to have an asymptotic variance which equals that of the maximum likelihood estimator in the parametric version of this problem. Realized kernels can also be selected to (i) be analyzed using endogenously spaced data such as that in data bases on transactions, (ii) allow for market frictions which are endogenous, and (iii) allow for temporally dependent noise. The finite sample performance of our estimators is studied using simulation, while empirical work illustrates their use in practice.


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