这份报纸基于指数的用途功能与比例的办理费用和有限时间地平线使最佳的投资问题担心。用一条部分微分方程途径,我们表明这个问题等价于包含对应于最佳的买并且卖的政策的二条免费边界的一个寓言的双障碍问题。数字例子被二项式的方法获得。
This paper concerns optimal investment problem with proportional transaction costs and finite time horizon based on exponential utility function. Using a partial differential equation approach, we reveal that the problem is equivalent to a parabolic double obstacle problem involving two free boundaries that correspond to the optimal buying and selling policies. Numerical examples are obtained by the binomial method.