Narrow GSEs to 30‑year purchases

Limit Fannie and Freddie to buying only 30‑year fixed‑rate mortgages for owner‑occupied home purchases, with no refinancing, second homes, or investor loans. Keep the GSEs inside government to avoid privatizing gains and socializing losses, and let all other mortgage products be fully private. — This offers a concrete blueprint to preserve the 30‑year mortgage without broad taxpayer backstops, reframing GSE reform beyond simple 'privatize or nationalize' binaries.