问题
单项选择题
An analyst does research about option-free bond price change due to both duration and convexity impacts. The duration of an option-free bond is 9.92, and the convexity measure for that bond is 63.8. If interest rates increase by 200 basis points, the bond's percentage price change is closest to:（）
A. -22.39%
B. -18.56%
C. -17.29%
答案
参考答案：C
解析：
-9.92×2%+63.8×(2%)2=-17.29%。