问题如下图：那什么测量 curve duration？
选项：
A. 
B. 
C. 
解释：
NO.PZ2018062010000008问题如下The followings are some scriptions of fferent kin of ration. Whiis most accurate?A.Macaulration is usefor measuring the curve ration.B.Effective ration measures interest rate risk in terms of a nonparallel shift in the benchmark yielcurve.C.A bons Macaulration always larger thits mofieration. C is correct.A bons Macaulration always larger thits mofieration. The relationship between Macaulration anmofieration is presentefollowing:Mofie ration=Macaulay ration1+rMofie;ration=\frac{Macaulay\;ration}{1+r}Mofieuration=1+rMacaulayrationWhere r is yielper periowhiis always larger thzero. penng on this, the nominator ( 1 + r ) is always larger th1. So a bons Macaulration always larger thits mofieration.A is incorrebecause Macaulration is usefor measuring the yielration, not the curve ration.B is incorrebecause effective ration measures interest rate risk in terms of a parallel shift in the benchmark yielcurve.考点ration解析effective ration而非Macaulration衡量的是curve ration，A说法不正确。有效久期衡量利率风险的时候，假设的是benchmark利率曲线发生一个平行移动，而不是nonparallel shift。parallel shift是指收益率曲线发生平行移动，也就是曲线上的每一个点都变动相同的幅度。B说法不正确。修正久期等于麦考利久期/(1+一期的市场利率)，市场利率通常情况下＞0,因此（1+市场利率）通常情况下大于1。所以，C说法正确，当选。 衡量nonparallel的是哪一种久期
你好 请问r是什么利率，为什么不可以是负数呢？
请问B 讲的是什么？
