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。

A optional model of portfolio investment with fuzzy-coefficient in which profit rates and risk rates are fuzzy Numbers is presented in this paper.

youdao

在本模型中综合考虑了证券组合的收益，风险，交易费用等因素，对投资者选择有效证券组合有一定的实用价值。

The profit rate, investment risk and transaction cost are synthetically considered in this new model, which is very useful in the portfolio selection.

youdao

Finally, I just want to say, next lecture is January twenty-eighth and we're going to talk about portfolio diversification, which is one very important application of the fundamental principle of risk management, as applied to securities.

最后，我想说下一讲是在1月28日,到时我们会谈谈资产组合多样化，这是风险管理基本原则中,对证券投资来说，这是非常重要的一项应用。

耶鲁公开课 - 金融市场课程节选