问题如下:
A three-year bond with a face value of USD 100 pays coupons annually at the rate of 10% per year. Its yield is 7% with annual compounding., estimate the price change if the annually compounded yield changes from 7% to 8.5%, using both the duration and the duration plus convexity approximations.
选项:
解释:
Using duration, the price change is
-2.5661 X 107.8729 X 0.015= -4.1522
Using duration and convexity, it is
-2.5661 X 107.8729 X 0.015 + (1/2) X 6.9020 X 107.8729 X 0.0152 = -4.0685
The actual bond price decline is 4.0419, showing that duration plus convexity gives a better estimate than convexity alone.
老师请问下,为什么我用7%先求债券价格107.8729,再用8.5%求债券价格103.831求出来的MD等-2.498,和用mac D/(1+y)求出来的2.566会不一样的呢