问题
单项选择题
Which of the following is NOT a reason bond market indexes are more difficult to create than stock market indexes（）
A. Bond deviations tend to be relatively constant.
B. There is a lack of continuous trade data available for bonds.
C. The universe of bonds is always changing due to new issues, retired bonds, sinking funds and calls.
答案
参考答案：A
解析：
Bond prices are quite volatile as measured by the bond’s duration.