Spread Options are crucial in the energy, currency and fixed income, and com- modity markets. The problem with spread options is that there are no closed- form formulae to price or hedge them. In this paper, we use matched asymptotic expansions in order to price spread options. We use both one-factor and two- factor models. In the one-factor models we assume the spread follows one of the following processes: Geometric Brownian Motion, Ornstein-Uhlenbeck and Arithmetic Brownian Motion. In the two-factor models, we assume the assets follow one of these processes
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