The transformed Gram Charlier distribution: Parametric properties and financial risk applications

Ángel León and Trino Ñíguez Grau

Journal of Empirical Finance, 2021, vol. 63, issue C, 323-349

Abstract: In this paper we study an extension of the Gram–Charlier (GC) density in Jondeau and Rockinger (2001) which consists of a Gallant and Nychka (1987) transformation to ensure positivity without parameter restrictions. We derive its parametric properties such as unimodality, cumulative distribution, higher-order moments, truncated moments, and the closed-form expressions for the expected shortfall (ES) and lower partial moments. We obtain the analytic kth order stationarity conditions for the unconditional moments of the TGARCH model under the transformed GC (TGC) density. In an empirical application to asset return series, we estimate the tail index; backtest the density, VaR and ES; and implement a comparative analysis based on Hansen’s skewed-t distribution. Finally, we present extensions to time-varying conditional skewness and kurtosis, and a new class of mixture densities based on this TGC distribution.

Keywords: Backtesting; Expected shortfall; Kurtosis; Skewness; Tail index; Unimodality (search for similar items in EconPapers)
JEL-codes: C2 C5 G1 (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:empfin:v:63:y:2021:i:c:p:323-349

DOI: 10.1016/j.jempfin.2021.07.004

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