The Federal Home Loan Banks will be able to use their own models and methodologies for internal assessments of mortgage asset credit risk next year, according to a bulletin issued by the Federal Housing Finance Agency late this week. The FHFA provided guidance on the models, which would apply to acquired member asset (AMA) mortgage pools, mortgage-backed securities, and collateralized mortgage obligations. “A bank should select a credit-risk model that is capable of producing loan-level estimates of potential credit loss, and that can accept as an input user-defined macroeconomic stress scenarios disaggregated to at least the state level,” said the FHFA.