“…The tools used to study these types of problems are methods and ideas specialized in stochastic calculus and partial differential equations: Wilmott et al [3], Courtadon [4] and Company et al [25] used finite differences methods to approximate the solution of the option valuation equations; Geske & Johnson, MacMillan, Barone-Adesi & Whaley, Barone-Adesi & Elliot, Barone-Adesi and Whaley, and Barone-Adesi developed methods of analytic approximation [5,6,7,8,9]; Gülkaç , used a series expansion method called homotopy perturbation method to find an approximate solution for the Black-Scholes equation [10], Alawneh & Al-Khaled [28] applied the Variational Iteration Method (VIM) to solve the Fockker-Planck equation and Black-Scholes equations. Cheng et al applied the homotopy analysis method [11], Bohner & Zheng [12], El-Wakil et al [26] and Tatari et al [27] used the Adomian decomposition method but they did not use boundary conditions to find the approximate solution of the Black-Scholes or Fockker-Planck equations.…”