For this pool, we increased our HPD stress to account for a potential increase in geographic concentration due to voluntary substitution. 3. Under its Aaa stress scenario, Moody's assumed that the total cost required to maintain all the properties remaining in the pool after default, including real estate taxes, property management fees, vacancy, home owner's association fees, insurance, repairs, and sales and marketing, would stretch for 33 months while a portion of the properties would generate income for 23 months. Moody's stress for foreclosure timeline for this transaction is lower than a typical RMBS transaction because Moody's expects the foreclosure process to be quicker since the trust does not have to foreclose on individual borrowers; instead, it will foreclose either on the special purpose vehicle borrower itself or the properties owned by a single entity. 4.