With the theory of stochastic differential equation, the authors discuss a problem of a class of riskinvestmentportfolio with stochastic character.
利用随机微分方程理论，对一类具有随机特征的风险投资组合问题进行深入研究。
2
A optional model of portfolioinvestment with fuzzy-coefficient in which profit rates and risk rates are fuzzy Numbers is presented in this paper.
针对预期收益率与风险损失率为模糊数时，建立了一种具有模糊系数的证券组合投资选择模型。
3
Based on mathematical methods, the article explores the risk and profit of stock portfolio and analyzes the strategies and methods of stock investment portfolio.