Freddie Mac’s Structured Agency Credit Risk deals and Fannie Mae’s Connecticut Avenue Security transactions have accounted for about 90 percent of risk transfers by the two government-sponsored enterprises. But the Federal Housing Finance Agency is pushing the GSEs to test new structures. FHFA said in a recent report that its longer term goal for the STACR and CAS products is for the GSEs to transition from debt issuance to credit-linked notes. That structure would be similar to enterprise debt issuances, but a trust would issue the note instead of the GSE. Principal and interest payments on the STACR and CAS debt issuances are...