问题如下：
Assume the price of a bond is expected to increase by 3% with a 80-basis-points decrease of market discount rate. If the bond price now decreases by 3%,the bond's market discount rate is most likely to pick up by:
选项：
A.80 basis points.
B.more than 80 basis points.
C.less than 80 basis points.
解释：
B is correct.
The bond's market discount rate is most likely to change by more than 80 basis points due to positive convexity of the bond.
这类题目总是错，老师有没有好的思考方法？绕弯多了容易错
