Q9

PLEASE SHOW THE CALCULATIONS

Needs Grading stion 9 Wall Street Journal and see the following rates Mornancalable You look at interest rates on 30 year Treasury and corporate bonds with different ratings in the bonds: T-bond-4.65% AMA-5.59% A-6.74% BB8 -7.89% In one sentence, the differences in rates among these issues were most probably caused primarily by