问题如下：
After further review of the composition of each of the funds, Perreaux notes the following.
Note 1：Aschel is the only fund of the three that uses leverage.
Note 2：Rosaiso is the only fund of the three that holds a significant number of bonds with embedded options.
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.
这个题放在leveraged这部分，考的是哪个知识点？谢谢
