For 50-year mortgages to exist, major laws and regulations must change, requiring Congress and FHFA involvement, redesign of mortgage-backed securities, and investor willingness to buy 50-year mortgage bonds.
"major laws and regulations must change. So, that would be a huge undertaking. Like, Congress would have to get involved. FHFA, they would have to rewrite rules and mortgage back securities would have to be redesigned, basically. And investors, of course, they're going to have to be willing to buy 50-year mortgage bonds."