老师，官网mock题第19题，这个被任命为合规官员的人不是还同时从事了co-investment, 冲刺笔记上写说合规官员应该独立予投资和运营人员，那这个不应该就是voilate，应该选C吗？

这道题的B选项， 为什么call是看12.26到11.98，而put是看16.44到17.72？解析思路如何理解

老师，CME的官网模考题，这一题说要用longest data history data，太长时间数据不是更容易涵盖multiple regime, 进而导致nonstationarity吗？为什么反倒说是assurance of stationarity

老师您好，课后题126页第二题：为什么不选hedge funds?解析中说：maintaining the funded status(MV OF ASSET/PV OF LIABILITY) of the plan would require the use of private equities in conjunction with public equities. 怎么理解呢？

net wealth 需要把cash value of life insurance考虑进去吗

bear flattening 短期长期利率都上涨，短期涨的更多，那么短期债券价格跌的幅度更大。选项B降duration，短期债券跌的更多吧？

因为barbell组合的convexity较大，会有更好的保护作用，涨多跌少。为什么这题得出的结果会相反呢？

老师可以详细讲一下这道题的三个选项吗

原版书，第83页，We return to the example of a five-year ₤100 million FRN at three-month MRR + 1.75%, with a DM of 2.25% and a 0.50% MRR priced at ₤97,671,718. We can derive the FRN’s effective rate duration by first calculating PV− and PV+ using a spreadsheet by shifting MRR down and up by 0.05% as follows:其中，分子562，500如何计算出来，分母0.6875%如何计算出来的

原版书，第79页，For example, in an upward-sloping yield curve, the Z-DM will be below the DM. Also, the Z-DM assumes an unchanged QM and that the FRN will remain outstanding until maturity. Z-DM will be below the DM如何理解