On a Variance Gamma Model (VGM) in Option Pricing: A Difference of Two Gamma Processes

M.E. Adeosun, S.O. Edeki, O.O. Ugbebor


The Variance-Gamma (VG) process is a three parameter stochastic process with respect to a Brownian motion. Here, we consider in our presentation, a detailed study of the VG process expressed as a difference of two gamma processes. As a result, we obtain the basic moments of the process using the characteristic function of the VG process with regard to the parameters of a differenced gamma processes. Also, the Levy-Khintchine formula for the process is derived via the Frullani’s integral. Finally, a modified European call option VG model incorporating a difference of two gamma processes is proposed.


Option pricing; Variance gamma model; Levy processes; Levy-Khintchine formula

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DOI: http://dx.doi.org/10.26713%2Fjims.v8i1.326

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