In order to derive a basis trade why they have consider YTM of a bond -LIBOR > CDS SPREAD. I need to know why they have consider LIBOR here
spread is always between 2 rates.
and LIBOR rate is what you would pay / receive for the Swap - on the floating side.
Thanks but this not about basis swaps. I’m asking about the basis trade
You’re comparing the credit spread on the bond to the credit spread on the CDS for that bond.
The credit spread on the bond is the bond’s YTM minus the risk-free rate for that maturity; LIBOR is an example of the risk-free rate.
The problem with a basis trade is that the spread of the bond’s YTM over LIBOR is not exclusively a credit spread; separating out the credit spread from the other premia isn’t easy.