Adjustable Rate Mortgages (ARM)
Adjustable Rate Mortgages (ARM)s are loans whose interest rate can vary during the loan’s term. These loans usually have a fixed interest rate for an initial period of time and then can adjust based on current market conditions. The initial rate on an ARM is lower than on a fixed rate mortgage which could allow you more affordability options.
ARM loans usually have 30-year terms with the initial rate being fixed between 1 year to 10 years. All ARM loans have a “margin” plus an “index.” Margins on loans range from 1.75% to 3.5% generally depending on the index and the amount financed in relation to the property value.
When the initial fixed-rate period ends, the margin will be added to the average index and rounded to the nearest 1/8 of one percent to calculate at the new interest rate. That rate will then be fixed for the next adjustment period. This adjustment can occur every year, three years, five years, etc. but there are factors limiting how much the rates can adjust. These factors are called “caps”.
For example: Suppose you had a “3/1 ARM” with an initial cap of 2%, a lifetime cap of 6%. The highest rate you could have in the fourth year would be 2% over where you started, and the highest rate you could have during the life of the loan would be 6 over your initial rate.
While ARM loans can adjust the interest rate periodically based upon agreed terms at closing, make sure you have a fully amortizing loan and that your loan pays off at the end of the term. Be careful to watch for any terms such as prepayment penalties or negative amortization. These are not common and are generally not advised.
Some ARM loans have a conversion feature that would allow you to convert the loan from an adjustable rate to a fixed rate. There is a charge to convert; however, the conversion rate is usually slightly higher than the market rate that the lender could provide you at that time by refinancing.