A mortgage where the interest rate adjusts periodically based on a benchmark index (typically SOFR or the Constant Maturity Treasury). ARMs often start with a low fixed-rate period (3, 5, 7, or 10 years) before adjusting. Sellers facing payment shock from ARM resets often consider cash sales.
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Reviewed by John Quigley · Founder, BuyHousesInCash · Last updated May 2026
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