问题如下：
An analyst observes the following historic geometric returns:
The real rate of return for corporate bonds is closest to:
选项：
A.4.3%.
B.4.4%.
C.4.5%.
解释：
A is correct.
(1 + 0.065)/(1 + 0.0210)-1 = 4.3%
老师您好，这个题没懂？可以解释一下吗，还有计算过程？
NO.PZ2015121801000046问题如下 analyst observes the following historic geometric returns:The rerate of return for corporate bon is closest to:A.4.3%.B.4.4%.C.4.5%. is correct.(1 + 0.065)/(1 + 0.0210)-1 = 4.3%公式1+名义收益率=（1+通货膨胀率）（1+实际收益率） 这道题问的是实际收益率，但是答案里用算名义收益率的方法计算了实际收益率，是不是写错了？
NO.PZ2015121801000046 问题如下 analyst observes the following historic geometric returns:The rerate of return for corporate bon is closest to: A.4.3%. B.4.4%. C.4.5%. is correct.(1 + 0.065)/(1 + 0.0210)-1 = 4.3%公式1+名义收益率=（1+通货膨胀率）（1+实际收益率） 题目是不是有问题？之前有个条件一样的题目，让算corporate bonrisk premium，给的答案是用6.5/2.5，那么不是说明这个6.5里是还包含了risk premium的吗？所以最后应该是rerate=6.5/（6.5/2.5）/2.1=1.2??
NO.PZ2015121801000046 问题如下 analyst observes the following historic geometric returns:The rerate of return for corporate bon is closest to: A.4.3%. B.4.4%. C.4.5%. is correct.(1 + 0.065)/(1 + 0.0210)-1 = 4.3%公式1+名义收益率=（1+通货膨胀率）（1+实际收益率） 如题目
NO.PZ2015121801000046问题如下 analyst observes the following historic geometric returns:The rerate of return for corporate bon is closest to:A.4.3%.B.4.4%.C.4.5%. is correct.(1 + 0.065)/(1 + 0.0210)-1 = 4.3%公式1+名义收益率=（1+通货膨胀率）（1+实际收益率） 可以详细讲解一下解题思路吗？谢谢老师
NO.PZ2015121801000046 问题如下 analyst observes the following historic geometric returns:The rerate of return for corporate bon is closest to: A.4.3%. B.4.4%. C.4.5%. is correct.(1 + 0.065)/(1 + 0.0210)-1 = 4.3% 这道题为什么不用先算risk premium呢？
