July 2nd, 2014, 1:15 pm
If I have an index of bonds with an average maturity of 10 years and I want to calculate the credit spread and excess returns against some comparable benchmark, should I use the 10 year Treasury yield or a portfolio of basket duration matched Treasuries?Some literature take the yield and subtract the risk-free rate with the same maturity. I know for individual bonds, this is how it's done.