fmt 2 table that has aggregated principal payments going out over time for collateral portfolio 102 grouped into subportfolios based on whether the collateral is i fixed or floating rate loans bonds mortgage backed security asset backed security or synthetics secured or unsecured and senior or subordinated fmt 3 table that has the total amounts in each subgrouping above as well as the percentage of the total collateral portfolio 102 and the respective weighted average interest rate inputs fmt 1 process s amp p cdo evaluator 210 performs the functions described above outputs table of sdrs 212 for different rating levels going up to aaa inputs 1 fmt 2 2 fmt 3 3 a table that specifically describes each debt instrument 122 currently outstanding or to be issued by the investment vehicle 100 for example this table may describe the amount coupon maturity amortization and other attributes of each debt instrument 122 this table may be generated manually and maintained as debt instruments 122 are issued or retired 4 the sdr generated in step 2 for the given rating being sought process dco 220 evaluates a number of default scenarios and interest rate scenarios for example twenty combinations that assume different timing for defaults and different interest rate trends to the sdr calculated in step 2 the default scenarios are described in paragraph 0025 below and the interest rate scenarios are described in paragraph 0026 within each default rate scenario combination the dco iteratively calls cash flow model 222 to evaluate the level of capital required to pass the scenario each iteration applies cash flow model 222 to the collateral portfolio u201c input table 3 u201d from the above list the descriptions of the debt instruments 122 and a given level.