A semi-parametric method for estimating the beta coefficients of the hidden two-sided asset return jumps

O. Theodosiadou, Vassilis Polimenis and G. Tsaklidis

Journal of Applied Statistics, 2019, vol. 46, issue 12, 2180-2197

Abstract: We introduce a new methodology for estimating the parameters of a two-sided jump model, which aims at decomposing the daily stock return evolution into (unobservable) positive and negative jumps as well as Brownian noise. The parameters of interest are the jump beta coefficients which measure the influence of the market jumps on the stock returns, and are latent components. For this purpose, at first we use the Variance Gamma (VG) distribution which is frequently used in modeling financial time series and leads to the revelation of the hidden market jumps' distributions. Then, our method is based on the central moments of the stock returns for estimating the parameters of the model. It is proved that the proposed method provides always a solution in terms of the jump beta coefficients. We thus achieve a semi-parametric fit to the empirical data. The methodology itself serves as a criterion to test the fit of any sets of parameters to the empirical returns. The analysis is applied to NASDAQ and Google returns during the 2006–2008 period.

Date: 2019
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DOI: 10.1080/02664763.2019.1581734

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