问题如下：
2. The effective duration of Bond #6 is:
选项：
A.lower than or equal to 1.
B.higher than 1 but lower than 3.
C.higher than 3.
解释：
A is correct.
The effective duration of a floating-rate bond is close to the time to next reset. As the reset for Bond #6 is annual, the effective duration of this bond is lower than or equal to 1.
什么时候会出现浮动利率久期小于1的情况，当付息间隔小于整年1？
