FRM®二级知识点:VaR mapping
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发布时间:2022-01-26 14:09
阅读:554次

在【FRM®知识点|映射固定收益投资组合】一文中,为大家介绍了映射固定收益投资组合的三种映射方法:Principal mapping、Durantion mapping、Cash-flow mapping,下面继续带大家学习FRM®二级知识点:VaR mapping。
Principal mapping:
one risk factor is chosen that corresponds to the average portfolio maturity.
→→Considers the timing of redemption payments only.
→→The only positive aspect of this method is tis simplicity
→→This approach overstates the true risk because it ignores intervening coupon payments.
简单粗暴,忽略了现金流,高估了风险。
Durantion mapping:
one risk factor is chosen that corresponds to the portfolio duration.
→→we replace the portfolio by a zero-coupon bond with maturity equal to the duration of the portfolio
Cash-flow mapping:
the portfolio cash flows are grouped into maturity buckets.
→→The precise method because we map the present value of the cash flows onto the risk factors for zeros of the same maturities and include the inter-maturity correlation.
最复杂,最精确,考虑每一期现金流。【点击免费下载>>>更多FRM学习相关资料】
example:A two-bond portfolio consisting of a$100 million 5-year 6%issue and a%100 million 1-year 4%issue.Both issues are selling at par.implying a market value of$200 million.
使用principal mapping,一张债券为一年期,一张债券为五年期,则组合平均到期时间为3年。3年期对应的VaR为1.4841%。
则dollar VaR=1.4841%×200=2.97
使用duration mapping,麦考林久期为2.733,使用线性差值法,则VaR=1.35%
使用cash-flow mapping,算每一期的现金流。
从图上所知,在不考虑相关系数的情况下,VaR为2.63,在考虑相关系数的情况下,VaR为2.57,相比之下,principal mapping的算法下VaR值最大,风险高估。cash-flow mapping的算法下VaR值最小。
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Sherry

CFA持证人,FRM持证人,六年投融资金融行业从业经历,现任金融专业讲师,谦逊而不平凡,讲法新奇,“相声式”授课法,上课带动性强,善于举例与互动,学员听、学自如。讲解逻辑严谨,公式推导清晰,学员理解轻松。归纳总结清晰,授课有方,学员快速记忆。考点把握准确。
