Analytic approximation method is introduced in the chapter five and we make an adjustment of BAW formula.
第五章介绍美式期权的近似解析解，并在著名的BAW公式上进行修正，得出新的公式并进行数值试验。
No analytic formula have been solved from mortgage pricing equation with prepayment, and approximation methods limited in their application.
带有提前支付特性的期权定价方程无法直接求出解析解，而传统的近似方法有其局限性。
No analytic formula have been solved from mortgage pricing equation with prepayment, and approximation methods limited in their application.
带有提前支付特性的期权定价方程无法直接求出解析解，而传统的近似方法有其局限性。
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