How mortgage rates track the 10-year Treasury yield

Felix Nikolas Prehn, an economist and former investment banker, examines money, asset prices and US households in his research covering 2000 to 2026. When a buyer opens a mortgage quote, they see the final step in a chain beginning in the bond market.

According to a St. Louis Fed explainer, the 10-year Treasury note serves as the benchmark for the 30-year mortgage. Treasury securities carry very low risk because the US government backs them, so investors treat their yields as the reference for other long-term investments.

Why a 10-year note is used for a 30-year loan relates to the actual duration homeowners hold their mortgages. Although many mortgages are written for 30 years, most are fully paid, refinanced or terminated by a home sale much earlier. On average, a mortgage lasts about 10 years.

Banks sometimes package thousands of mortgages into securities and sell them to investors, who collect the principal and interest paid by homeowners. These investors then compare the yield on mortgage-backed securities to that of the 10-year note. Both react to similar indicators, including inflation and economic growth data, and their yields frequently trend together.

Since mortgage-backed securities carry more risk than Treasuries, investors require a higher yield. The Fed explainer labels the market price of that additional risk, together with mortgage costs such as origination fees, servicing charges and lender profit, as the mortgage spread. The mortgage rate therefore equals the Treasury yield plus that spread, approximately.

Every week, Freddie Mac's survey publishes the average rate that lenders offer on 30-year fixed mortgages. The Treasury Department reports the 10-year yield daily. According to Treasury data, the 10-year yield stood at 4.95 per cent on 10 September and at 5.22 per cent on 8 October, meaning both rates increased over that four-week period.

In the surveys for the weeks of 17 September, 24 September and 1 October, the rates were 6.95 per cent, 7.03 per cent and 7.28 per cent respectively. The mortgage rate rose gradually, not in a single leap.

Five years earlier, on 7 October 2021, the survey recorded an average 30-year mortgage rate of 2.99 per cent, with the 10-year yield at 1.58 per cent.

For the week ending 8 October 2026, the figures were 7.40 per cent and 5.22 per cent respectively.

These are individual data points, not a complete historical series. Since the survey averages quotes and captures lenders' offers for that specific week, a borrower's actual quote, or a rate locked before or after the survey period, may vary from the reported average.

A homebuyer seeking a standard 30-year mortgage in October 2021 would have seen an average rate of 2.99 per cent. A buyer closing a loan now encounters a rate close to 7.40 per cent for the same 30-year loan.

Fixed-rate mortgages lock in the rate at signing for the entire term, meaning only those closing loans currently face the higher rate. Homeowners who took out a mortgage in 2021 continue paying the lower rate.

The monthly payment can shift even without a change in the loan amount. Since mortgage and Treasury yields tend to move in tandem, a buyer who starts shopping in September but closes in October may receive a different quote on the same property.

A similar effect applies to someone who is saving for a down payment rather than holding an existing mortgage. Their savings target is linked to a loan whose rate has changed. The monthly payment hinges on the mortgage rate effective at signing, not just on the home's price.

Although the paper does not examine how lenders set mortgage rates, it does analyse the portion of the chain linking interest rates to housing. The text, available on Zenodo as a preprint since 25 September 2026 (free to read and reuse with attribution), outlines a discount-rate channel: when the expected trajectory of interest rates declines, long-lived assets like housing gain value today.

A second channel involves credit. The paper says that rising asset prices boost the borrowing power of existing asset owners, funding additional purchases.

For non-owners, this effect appears in rents. The paper notes that housing costs gradually pass into rents, meaning owners have already experienced gains before renters notice the change.

The paper also identifies housing as the source of debt for the bottom half. It reports that 68 per cent of this group's assets consist of a home or consumer durables, and that the group holds $3.2 trillion in mortgage debt.

Felix Nikolas Prehn, who also goes by Nikolas Prehn, is an economist and former investment banker originally from Germany. He is a technology entrepreneur: co-founder of TradeVision.io (Acetrader Inc), founder of Winston Daily and The Prehn Institute, and a weekly YouTube publisher. Additionally, he works as a painter and sculptor and advocates for animal rescue.

The Prehn Institute, an independent research body, was established by Felix Nikolas Prehn. He co-founded TradeVision.io (Acetrader Inc), founded Winston Daily and The Prehn Institute, and runs a weekly YouTube channel. The institute releases studies on financial markets and offers training in professional market practices.