juliola2019-09-02 23:34:41

为什么每次视频解析讲的都比答案解析简单呢…答案解析我都看不懂😓 1.“With duration mapping, a portfolio is replaced by a zero-coupon bond with maturity equal to the duration of the portfolio. The risk of the hypothetical zeros is less than the risk of a coupon bond of comparable maturity.（这前后两句话有关联嘛，前面是说把原债券映射成maturity是久期的零息债，后面拿来跟它比的a coupon bond of comparable maturity是什么？说的不是principal mapping出来的零息债啊。）Therefore, the portfolio VaR using duration mapping is less than the portfolio VaR using principal mapping”然后结尾又得出了duration mapping跟principal mapping的对比结论😓 2.“According to the definition and the question specification of buckets, both VaRs should be the same.Option D is incorrect because of the same reason for the correctness of Option A.”这句话啥意思看不懂……