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Fixed-Rate Mortgages Retain 92% Market Share in September

By Markets Desk · 2026-09-15 · 2 min read
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Fixed-rate loans dominate the market as 92% of households choose stability over the lower initial costs of adjustable-rate products.

Fixed-rate mortgages account for approximately 92% of all active home loans. This dominance indicates a strong preference for payment stability among borrowers. Adjustable-rate mortgages (ARMs) hold the remaining 8% of the market share. These products appeal to a specific subset of buyers with different financial goals.

The Federal Reserve's Secured Overnight Financing Rate serves as a primary benchmark for ARM adjustments. Lenders add a fixed margin to this daily rate to determine the borrower's interest. Margins typically range from 2% to 3.5% depending on creditworthiness. Rate caps limit how much the interest can rise during any given period.

ARM Structures Vary by Fixed Period

ARMs are defined by their initial fixed period and subsequent adjustment frequency. A 7/6 ARM features a fixed rate for seven years followed by semi-annual adjustments. The 5/1 ARM offers five years of fixed rates with annual adjustments thereafter. Most of these loans have a total term of 30 years. The fixed period determines how long the borrower enjoys a stable payment.

Investors and short-term homeowners often select ARMs for lower initial rates. These groups plan to sell the property before the adjustment phase begins. This strategy allows them to benefit from the lower starting interest without facing rate hikes. Real estate professionals also use ARMs to manage cash flow during rental periods.

Benchmark Rates Drive Monthly Adjustments

The US Treasury publishes the SOFR daily to reflect bank borrowing costs. This figure directly influences the new interest rate for ARM holders. Lenders apply their specific margin to this benchmark to calculate the final rate. Changes in the SOFR can lead to immediate shifts in monthly payments.

Rate caps provide a safety net against rapid increases. Initial caps limit the first adjustment after the fixed period ends. Subsequent caps restrict how much the rate can rise in each following adjustment. Lifetime caps set a maximum ceiling for the entire loan term. These mechanisms protect borrowers from extreme volatility in the credit markets.

Market Data Reflects Current Borrowing Trends

GN auto markets/bonds: interest rates reports track these daily fluctuations. The data shows that high-yield savings rates reached 4.50% on September 14. Certificate of deposit rates also hit this level. These figures provide context for the broader cost of borrowing. Mortgage rates remain a key indicator of housing affordability.

Buyers in high-interest-rate environments often compare ARM options. They seek lower initial payments while waiting for potential rate declines. This approach requires careful planning to avoid financial strain. The choice between fixed and adjustable rates depends on individual risk tolerance and time horizon.

Based on reporting by Fortune, compiled by the Tradingbird desk.

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