The bond is expected to be downgraded from A+ to A–. The G-spread is expected to widen from 0.85% to 1.10% based on market pricing. The expected return over a one-year horizon is, therefore,
[–Duration × (New spread – Initial spread)] + Annual Coupon =[–6.9 × (1.10% – 0.85%)] + 5.00% = 3.275%.
考点:固收- Credit Analysis Models - Credit Scores and Credit Ratings
请问求expected return什么时候要加coupon什么时候不用加?有些题求confusion matrix好像就没用加上coupon?