With the theory of stochastic differential equation, the authors discuss a problem of a class of risk investment portfolio 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。

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A optional model of portfolio investment 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。

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Based on mathematical methods, the article explores the risk and profit of stock portfolio and analyzes the strategies and methods of stock investment portfolio.

在其风险与收益的控制方面，应运用数学方法研究股票投资组合的内涵，以便制定出正确的股票投资组合的策略。

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The firm also lost millions by moving her money into a high-risk investment portfolio without her permission, it has been alleged.

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The purpose is to reduce the risk of a large portfolio loss by balancing portfolio risk among different investment types.

FORBES: Choices in Portfolio Rebalancing

Therefore, any portfolio that includes more of this kind of alternative investment correspondingly increases the risk of the whole portfolio.

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