ARM mortgage rate update for Oct. 30, 2026

Although fixed-rate mortgages remain much more common than adjustable-rate mortgages, ARMs can be appealing if you are comfortable with some uncertainty. An ARM may begin with a relatively low introductory rate before any adjustments take effect, which can make it attractive for buyers who plan to rent out the property, flip it, or move before the introductory period ends.

Below, we explain how ARMs work, when they may be worth considering instead of a standard fixed-rate mortgage, and how average ARM rates compare based on Mortgage Research Center data.

You can view the prior business day’s ARM rate report here.

Average ARM mortgage rates

ARMs are available in several formats, depending on how long the initial fixed-rate period lasts and how often adjustments are made afterward. For instance, a 7/6 ARM has a fixed rate for seven years, followed by rate changes every six months.

Fortune reviewed the latest MRC data available at the time of writing.

Fixed-rate vs. adjustable-rate mortgages

Roughly 92% of U.S. mortgages are fixed-rate loans, reflecting how popular their stability is. Unlike ARMs, which can change after an initial period, fixed-rate mortgages lock in one interest rate for the full life of the loan. That predictability is a major reason many borrowers choose them.

Even so, ARMs can still be useful in certain circumstances. About 8% of borrowers choose them instead of the more common fixed-rate option.

When an adjustable-rate mortgage may make sense

Three kinds of buyers may be especially drawn to ARMs:

• Short-term homeowners: If you expect to relocate within a few years, an ARM may provide savings through a lower introductory rate before later adjustments become relevant. Still, it is worth thinking carefully about whether you will truly be able to move as quickly as planned.
• Property investors: Investors may use ARMs to take advantage of a lower starting rate, then sell the home before the adjustment period begins or raise rent if they are leasing the property during a higher-rate environment.
• Buyers dealing with elevated rates: When interest rates are high, an ARM may offer a lower rate during the introductory period and the possibility of lower rates later if market conditions improve.

How adjustable-rate mortgages work

ARMs typically start with a low fixed-rate period lasting three to 10 years, then move into adjustment periods. Once the rate begins to change, several factors help determine what you pay:

• Benchmark indices such as SOFR: Your ARM is generally linked to a benchmark, often SOFR. This reflects the cost for banks to borrow money overnight. The U.S. Treasury publishes a new SOFR each morning.
• Lender margins: Lenders add a fixed margin, often between 2% and 3.5%, to the benchmark used for your ARM. The benchmark plus the margin determines your mortgage rate. The exact margin can vary based on the lender and your credit profile.
• Rate caps: Caps limit how much your interest rate can rise over a given period or over the life of the loan. These may include initial, periodic, and lifetime caps.

Common ARM types include the 5/1 ARM, which stays fixed for five years before annual adjustments, and the 10/6 ARM, which remains fixed for 10 years before changing every six months. Other versions include 3/1 ARMs, 7/1 ARMs, and 10/1 ARMs.

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Refinancing from an ARM to a fixed-rate mortgage

Sometimes your plans change. You may have purchased a home with the idea of flipping it, only to decide it makes more sense to keep it as your primary residence. Or you may have bought a starter home and later realized you are not moving as soon as expected. In that situation, refinancing into a fixed-rate mortgage may be a good option.

The process is similar to refinancing from one fixed-rate loan to another. You compare lenders, submit the paperwork needed for the application, and use the new loan to pay off the old one in full.

Pros and cons of adjustable-rate mortgages

Like any mortgage product, ARMs come with both advantages and disadvantages. It is wise to review them with a trusted loan officer to determine whether this loan type fits your situation. Here are some key points to consider.

Pros

• Potentially lower introductory rates than fixed-rate mortgages.
• The chance of lower monthly payments if market rates fall.
• Some borrowers may find qualification standards less strict.

Cons

• Monthly payments can rise sharply once the fixed period ends.
• Comparing offers can be more complex than with fixed-rate loans.
• ARMs offer less predictability and stability than fixed-rate mortgages.