Some $13.26 billion of high-balance mortgages were included in agency MBS issued during the third quarter of 2025. Nine months into the year, agency high-balance sales were down somewhat on an annual basis, with the decline concentrated in sales to the GSEs. (Includes three data tables.)
While government-insured mortgages are assumable, few assumptions are completed due to various obstacles. GSE mortgages were also assumable until the 1980s, when legal issues prompted a change.