基于风险价值不能准确度量风险以及缺乏次可加性。

Valve at Risk is unable to measure the risk exactly and lack of subadditive.

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在一定的条件下，我们证明了这两种次可加测度压是等价的。

Furthermore, we proved that this two definitions was equivalent under some assumptions.

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基于风险价值不能准确度量风险以及缺乏次可加性这些缺点，目前国际上有人提出用损失期望值来测量风险。

At last, as valve at Risk is unable to measure the risk exactly and lack of subadditive , therefore, it is suggested in the international that Expected shortfall should be used to measure risk.

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