Earlier quoted context omitted.
> These are all in bonds paying 3% or less. Who is holding these? Fannie Mae and Freddie Mac. Most mortgage originators packaged up the mortgages and sold them immediately to the government.
They didn’t “sell them to the government”. However, the Fed was actually a large purchaser of MBS if that is what you’re referring to.
So they did sell them to "a government-sponsored entity and the US government has an implied guarantee to pay any defaults."