FRM®知识点|VaR Implementation 2
文章来源:网络
发布时间:2022-01-07 14:37
阅读:380次

前面为大家介绍了【FRM®知识点|VaR Implementation 1】,接下来继续带大家了解VaR Implementation 2.
Time horizon:
The appropriate time horizon depends on the risk measurement purpose as well as portfoio liquidity
按照实际需求对风险估计的目的和流动性进行考量。
“Danielsson(2002) adds that, if the purpose of VaR is to protect against losses during a liquidity crisis, the ten-day horizon at 99% refers to an event that happens roughly 25 times a decade, while a liquidity crisis is "unlikely" to happen even once a decade. ”【点击免费下载>>>更多FRM学习相关资料】
如果VaR的目的是为了在流动性危机期间防止损失,那么99%的10期限,是指10年发生25次exceptions,然而流动性危机发生的概率并不大,哪怕10年内发生1次。
There is not a universally accepted approach for aggregating various VaR measures based on different time horizons.
目前还没有一种普遍接受的方法来基于不同的时间范围聚合各时段的VaR
“Finger(2009), if instance, points out that there is no conceptual or statistical framework to justify the aggregation of a ten-day VaR and a one-year IRC”
指出没有概念和统计框架来证明十天的VaR和一年期的IRC的加总是正确的。
The practical usefulness of the square-root of time scaling should be recognized.
平方法则需要满足两个条件:独立同分布。
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