The company used research from its equity analysts, which include five-year forecasts of cash flows to evaluate statues, These are then compared with forecasts of liabilities coming due to provide ratings of creditworthiness. Morningstar's ratings rest on four key factors: business risk, cash-flow cushion, solvency score and distance to default.
The company provides the following credit ratings: AAA (extremely low default risk),
AA (very low default risk), A (low default risk), BBB (moderate default risk), BB (above average default risk), B (high default risk), CCC (currently very high default risk), CC (currently extreme default risk), C (imminent payment default) and D (payment default)