Adjustable-Rate Mortgage - ARM

Definition of 'Adjustable-Rate Mortgage - ARM'


A type of mortgage in which the interest rate paid on the outstanding balance varies according to a specific benchmark. The initial interest rate is normally fixed for a period of time after which it is reset periodically, often every month. The interest rate paid by the borrower will be based on a benchmark plus an additional spread, called an ARM margin.

An adjustable rate mortgage is also known as a "variable-rate mortgage" or a "floating-rate mortgage".

Investopedia explains 'Adjustable-Rate Mortgage - ARM'


Both 2/28 and 3/27 mortgages are examples of ARMs. A 2/28 mortgage's initial interest rate is fixed for a period of two years and then resets to a floating rate for the remaining 28 years of the mortgage. A 3/27 mortgage is typically the same as a 2/28 mortgage, except that the interest rate is fixed for three years and then floats for the remaining 27 years of the mortgage.


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