What a Fannie and Freddie Sale Would Do to Your Mortgage Rate
The value of the two companies is a secondary question. The one that determines borrowing costs is whether investors still believe the federal government stands behind the securities they issue.
Discussion of privatizing Fannie Mae and Freddie Mac tends to focus on the equity: a combined valuation estimated near $500 billion, a government stake worth perhaps $250 billion, an offering that would be the largest in American history.
The number that matters to households is none of those. It is the spread between the 10-year Treasury yield and the 30-year mortgage rate.
How the plumbing works
Most American mortgages are not held by the bank that made them. They are sold, pooled and issued as securities guaranteed by one of the two companies, which promise investors timely payment of principal and interest regardless of whether borrowers pay.
Those securities trade at yields close to Treasuries because investors treat the guarantee as effectively federal — a belief grounded in seventeen years of conservatorship and in the government's demonstrated willingness to stand behind the market in 2008.
That belief is the reason a 30-year fixed-rate mortgage exists at scale in the United States and almost nowhere else.
The scenario that raises rates
If a privatization leaves ambiguity about the guarantee, investors will demand compensation for the uncertainty. The compensation shows up as a wider spread, and the spread shows up in every mortgage quoted in the country.
Estimates of the magnitude vary considerably, and the honest answer is that nobody knows, because the experiment has not been run. What is not in dispute is the direction.
The spread is already wider than its historical norm — the reason a 4.75% 10-year yield produces a 6.7% mortgage rate. Adding uncertainty about the guarantee to an already elevated spread is the risk that housing economists have been describing all year.
The design question
There are versions of privatization that could work. An explicit, paid-for federal guarantee — where the companies pay the government a fee for a backstop written into law — would remove the ambiguity entirely and could be combined with private capital taking first loss.
That structure has been proposed repeatedly since 2008 and has never passed, because it requires Congress to legislate rather than an agency to act.
Where things stand
The effort has stalled for now. The companies remain in conservatorship, guaranteeing mortgages and sending profits to the Treasury. For borrowers, the practical consequence of a stalled privatization is the absence of a risk — which, in mortgage finance, is usually the best available outcome.
