Monotonicity of savings function in Endogenous Gridpoint Method with stochastic portfolio returns
证明了在随机投资组合收益问题中应用内生网格点法时储蓄函数的单调性，为该方法的应用提供了充分条件。
This paper provides a comprehensive proof of monotonicity of the savings function in the application of the Method of Endogenous Gridpoints (EGM) to problems with stochastic portfolio returns. The proof contributes to the completeness of solutions by providing the sufficient condition for the application of EGM to problems with stochastic portfolio returns as seen in the literature.