NO.PZ2020033002000024
问题如下:
ABC currently has an A credit rating and has issued two-year zero-coupon bonds, and the market expects the company to maintain its rating at A, downgrade to BBB, or upgrade to AA in one year's time with probabilities of 85%, 10%, and 5%, respectively. Assuming a flat risk-free yield curve with a value of 1% and credit spreads of 70, 100 and 300 basis points at the AA, A and BBB levels, respectively, all interest rates are compounded annually. What is the expected value of a zero-coupon bond after one year?
选项:
A.96.15 B.98.04
C.98.33
D.97.87
解释:
D is correct.
考点: Infer Credit Risk from Corporate Bond Prices
解析:
一年之后,债券变成了一年期的零息债券,
AA的值为 100/(1+1%+0.7%)=98.3284
A的值为100/(1+1%+1%)=98.0392
BBB的值为100/(1+1%+3%)=96.1538
预期值=5%*98.3284+85%*98.0392+10%*96.1538=97.8651
按照题目意思,A级的折现率就是2%,然后折回第一年得到P0.
然后按照比例,和对应r,算出来第一年结束时候的value