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。
It also studies the structures and properties of the set of the efficient risk -portfolio or the efficient portfolio.
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.
为有效控制长寿风险，可以利用保单条款控制风险、利用产品组合“对冲”风险、利用再保险分散风险、风险证券化以及开发金融衍生工具对冲风险。
In order to effectively manage longevity risk, we can use many methods such as policy term, product portfolio, reinsurance, longevity bond and financial derivatives, to control and prerent the risk.
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