Optimal portfolio of efficient frontier controls and adjusts default risk of loan portfolio effectively.

通过有效边界上的最优组合有效地控制和调整贷款组合的违约风险。

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It also studies the structures and properties of the set of the efficient risk -portfolio or the efficient portfolio.

研究有效风险证券组合集与有效证券组合集的构造与性质。

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