Treasury Yields and Mortgage Rates
Mortgage Capital · NMLS# 1859012 · Licensed Florida mortgage broker
If you want to predict where mortgage rates are heading, watch the 10-year Treasury yield. Mortgage rates track it more closely than they track the Fed's headline rate, moving up and down with it almost daily. The two aren't identical, but the gap between them, called the spread, is fairly stable over time.
For Florida buyers, this is the single most useful market signal. When the 10-year yield rises, expect mortgage rates to follow within a day or two; when it falls, the same in reverse.
Why the 10-year drives mortgages
Most homeowners pay off or refinance well before 30 years, so a 30-year mortgage behaves more like a 10-year investment. That's why lenders price it off the 10-year Treasury rather than a longer benchmark.
Mortgage-backed securities compete with Treasuries for investor money. When Treasury yields rise, mortgage bonds must offer more too, lifting your rate.
The spread between them
Mortgage rates sit above the 10-year yield by a spread that covers the extra risk of mortgage bonds. That spread widens in uncertain times and narrows when markets are calm.
When the spread is unusually wide, mortgage rates can fall even if Treasury yields hold steady, simply by the spread normalizing.
Using the signal
Check the 10-year yield trend before locking. A rising yield argues for locking sooner; a falling one may reward a short float if your timeline allows.
Don't over-trade it. The point is to understand the direction, not to outguess professional bond traders day by day.
Frequently asked questions
What drives mortgage rates, the Fed or Treasuries?
Mortgage rates track the 10-year Treasury yield far more closely than the Fed's overnight rate, moving with it almost daily.
Why the 10-year and not the 30-year Treasury?
Most mortgages are paid off or refinanced well before 30 years, so they behave more like a 10-year investment and are priced accordingly.
What is the mortgage-to-Treasury spread?
It's the gap between mortgage rates and the 10-year yield, covering the extra risk of mortgage bonds. It widens in uncertain times and narrows in calm ones.
Should I watch Treasury yields before locking?
Yes. A rising 10-year yield argues for locking sooner; a falling one may reward a short float if your timeline allows.