NO.PZ201812020100000104
问题如下：
Based on Note 2, Rosaiso is the only fund for which the expected change in price based on the investor’s views of yields and yield spreads should be calculated using:
选项：
A.convexity.
B.modified duration.
C.effective duration
解释：
C is correct.
Rosaiso is the only fund that holds bonds with embedded options. Effective duration should be used for bonds with embedded options. For bonds with embedded options, the duration and convexity measures used to calculate the expected change in price based on the investors’s views of yields and yield spreads are effective duration and effective convexity. For bonds without embedded options, convexity and modified duration are used in this calculation.
请问A选项改为effective convexity是不是就对了？另外，effective convexity的计算公式是否需要掌握？
