Suppose that ABSs are created from portfolios of subprime mortgages with the following allocation of the principal to tranches: senior 85%, mezzanine 10%, and equity 5%. (The portfolios of subprime mortgages have the same default rates.) An ABS CDO is then created from the mezzanine tranches with the same allocation of principal. How high can losses on the mortgages be before the mezzanine tranche of the ABD CDO bears losses?