– Adjustable Rate Mortgage. 3/1 ARM (3 year ARM)- the rate is fixed for a period of 3 years after which in the 4th year the loan becomes an adjustable rate mortgage (ARM). The adjustable rate is tied to the 1-year treasury index and is added to a pre-determined margin (usually between 2.25-3.0%) to arrive at your new monthly rate.
Adjustable-rate mortgage – Wikipedia – A variable-rate mortgage, adjustable-rate mortgage (ARM), or tracker mortgage is a mortgage loan with the interest rate on the note periodically adjusted based on an index which reflects the cost to the lender of borrowing on the credit markets. The loan may be offered at the lender’s standard variable rate/base rate.There may be a direct and legally defined link to the underlying index, but.