NO.PZ202112010200001603
问题如下:
What is the expected excess spread of the BBB rated bond for an instantaneous 50 bp decline in yields if the bond’s LGD is 40% and the POD is 0.75%?
选项:
A.1.95%
2.45%
2.70%
解释:
C is correct. The expected excess spread is equal to the change in spread multiplied by effective spread duration (–(EffSpreadDur × ΔSpread)) less the product of LGD and POD, which we can solve for to get 2.70% (=(–6 × 0.50%) – (0.75% × 40%)).
为什么expected excess spread不等于2.75-(-0.5*6)-0.4*0.75,而只有后面一部分?