We should always bear in mind that any risk measure estimates that we produce are just that— estimates. We never know the true value of any risk measure, and an estimate is only as good as its precision: if a risk measure is very imprecisely estimated, then the estimator is virtually worthless, because its imprecision tells us that true value could be almost anything; on the other hand, if we know that an estimator is fairly precise, we can be confident that the true value is fairly close to the estimate, and the estimator has some value. Hence, we should always seek to supplement any risk estimates we produce with some indicator of their precision. This is a fundamental principle of good risk measurement practice.我们应该时刻牢记，任何风险度量

我们生产的只是估计。我们永远不知道

任何风险度量的真实值，和估计值一样好

因为它的精确性：如果一个风险度量是非常不精确的估计，

那么估计量实际上是毫无价值的，因为它的不精确性

告诉我们真正的价值几乎可以是任何东西；另一方面

另一方面，如果我们知道估计量是相当精确的，我们可以

确信真实值与估计值相当接近，以及

估计量有一定的价值。因此，我们应该始终寻求

用一些指标来补充我们的风险估计

他们的精确性。这是良好风险的基本原则

测量实践。