How Do Fed Policy, the 10-Year Treasury, and Daily Market Moves Affect Mortgage Rates?
Mortgage rates mostly follow the 10-year Treasury yield, not the Federal Reserve's short-term rate, and they can change more than once in a day as the bond market reacts to news. That's why today's quote can differ from tomorrow's, and why a Fed meeting doesn't guarantee your mortgage rate will move.
Last updated September 29, 2026Why do mortgage rates track the 10-year Treasury instead of the Fed?
The Fed sets a short-term rate that mainly affects things like credit cards and short-term bank loans. A 30-year mortgage is a long commitment, so lenders price it off longer-term bonds, especially the 10-year Treasury yield, plus a spread on top. That spread isn't fixed. It widens when markets are uncertain, and the Atlanta Fed noted in late 2025 that it had stayed elevated. So a Fed cut or hike doesn't move mortgage rates by the same amount, or always in the same direction, right away.
Why can your rate change before you lock?
Mortgage rates move with bond prices, and bond prices move all day as economic data and news come out. A quote is a snapshot of that moment. It isn't a promise until you have a signed rate lock.
If your rate or fees differ between your Loan Estimate and your Closing Disclosure, the usual reasons are timing, an expired lock or a change in your loan details. You can always ask the lender to explain exactly what changed before you sign.
It depends on your situation:
- You haven't locked: your rate can change with the market until you do.
- You're comparing quotes on a volatile day: a morning quote may not hold in the afternoon, so compare quotes taken close together.
- Your credit is strong and you're borrowing a smaller share of the home's value: you'll generally be offered a lower rate than a borrower with weaker credit or less equity on the same day.
- Your Loan Estimate and Closing Disclosure don't match: ask what changed and why before you sign.
| 10-year Treasury yield | Mortgage rates generally move with it, not with the Fed's rate directly |
|---|---|
| Spread over the Treasury | Changes with market conditions; elevated recently, per the Atlanta Fed |
| Rate lock | Holds your rate for a set period while the loan is processed |
| Daily movement | Rates can change more than once in a business day |
Related questions
Sources
- https://www.atlantafed.org/research-and-data/2025/11/10/not-joined-at-the-hip-relationship-between-the-fed-funds-rate-and-mortgage-rates
- https://www.fanniemae.com/research-and-insights/publications/housing-insights/rate-30-year-mortgage
- https://www.brookings.edu/articles/high-mortgage-rates-are-probably-here-for-a-while
- https://www.schwab.com/learn/story/what-is-happening-with-mortgage-interest-rates
- https://www.cbsnews.com/news/which-impacts-mortgage-rates-more-the-fed-or-10-year-treasury-yield-experts-weigh-in
- https://www.consumerfinance.gov/ask-cfpb/whats-a-lock-in-or-a-rate-lock-en-143
- https://www.consumerfinance.gov/ask-cfpb/my-rate-or-the-fees-changed-between-my-loan-estimate-and-my-closing-disclosure-what-do-i-do-en-184
Sourced from licensed loan officers and brokers in the FreeRateUpdate network.
Educational information only, not individualized financial or legal advice. Program details and rates change; verify current terms with a licensed loan officer before making a decision.