The 10-Year Treasury Yield

Mortgage rates often move in the same direction as the 10-year Treasury yield, but not by the same amount and not every day. Investors compare mortgage-backed securities with Treasuries because Treasuries are the safer, more liquid benchmark. Mortgage bonds carry extra risks, especially the chance borrowers will refinance or sell early, so mortgage rates sit above Treasury yields. The size of that gap is set by investors each day. It is not a constant, so this article does not print one.

Why the 10-year, not the 30-year

A 30-year mortgage is a 30-year contract, but most loans are paid off much sooner through a sale or refinance. The 10-year Treasury's time frame is closer to how long investors expect mortgages to last, so the market uses it as a rough guide. The U.S. Treasury publishes daily yields (Treasury).

Why mortgage rates do not move one to one

• Prepayment risk. When rates fall, borrowers refinance and investors get money back early. That risk changes how much investors pay for mortgage bonds.
• Mortgage bond supply and demand. Mortgage-backed securities from Fannie Mae, Freddie Mac and Ginnie Mae trade in their own market (Fannie Mae MBS; Ginnie Mae). See what moves mortgage rates.
• Lender capacity and costs. When lenders are busy, pricing can lag market moves.
• Loan-level factors. Your credit, loan-to-value, loan type and points affect your price no matter what the market does.

The Federal Reserve is a different lever

The Federal Open Market Committee sets a target for the federal funds rate, a short-term rate (Federal Reserve). A Fed rate change does not set mortgage rates directly. Long-term yields and mortgage bond prices react to what investors expect about inflation, growth and future Fed policy, and they can move before, after, or opposite to a Fed decision.

How to read "the 10-year is up"

It means the benchmark yield rose. Mortgage rate sheets often worsen on those days: the same note rate costs more in points, or the rate available at the same points is higher. Often is not always. A day can have a Treasury move and a mortgage bond move that do not match.

Fictional example

Fictional example: a buyer tracks the 10-year yield for a week and asks for a quote to drop by the same amount the yield fell. The quote moves from the mortgage rate sheet, not from a subtraction problem. Mortgage bonds moved less than Treasuries that week, so pricing improved only a little. The buyer, under contract with a closing date in five weeks, decides to lock rather than keep waiting.

Common mistakes

• Assuming mortgage rates equal the 10-year yield plus a fixed number.
• Assuming a Fed rate cut means mortgage rates drop the same day.
• Waiting for the perfect market while the closing date approaches without a lock.

To understand why two quotes differ even on the same market day, see comparing quotes.

Next step

If you are trying to time a lock around market news, I can tell you how pricing for your specific loan has been moving. Book a call, or start an application.

Related questions

• What moves mortgage rates?
• When should I lock my rate?
• Why are two mortgage quotes different?

Sources

Links checked Oct 21, 2026.

• U.S. Treasury, Daily Treasury Par Yield Curve Rates (daily data, retrieved Oct 21, 2026): https://home.treasury.gov/resource-center/data-chart-center/interest-rates/TextView?type=daily_treasury_yield_curve
• Federal Reserve, Federal Open Market Committee (retrieved Oct 21, 2026): https://www.federalreserve.gov/monetarypolicy/fomc.htm
• Fannie Mae Capital Markets, Mortgage-Backed Securities overview (retrieved Oct 21, 2026): https://capitalmarkets.fanniemae.com/mortgage-backed-securities
• Ginnie Mae, home page (guarantee of FHA, VA, USDA mortgage-backed securities) (retrieved Oct 21, 2026): https://www.ginniemae.gov/

About the author: McKade Lively, NMLS 2704474, American Pacific Mortgage Corporation dba True North Home Loans, NMLS 1850.

Equal Housing Opportunity.

Last reviewed: Oct 2026

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