Adjustable Rate Mortgages ARM

An adjustable rate mortgage (ARM), variable rate mortgage or floating rate mortgage is a mortgage loan where the interest rate on the note is periodically adjusted based on an index. This is done to ensure a steady margin for the lender, whose own cost of funding will usually be related to the index. Consequently, payments made by the borrower may change over time with the changing interest rate (alternatively, the term of the loan may change). This is not to be confused with the graduated payment mortgage, which offers changing payment amounts but a fixed interest rate. Other forms of mortgage loan include interest only mortgage, fixed rate mortgage, negative amortization mortgage, and balloon payment mortgage. Adjustable rate mortgages transfer part of the interest rate risk from the lender to the borrower. They can be used where unpredictable interest rates make fixed rate loans difficult to obtain. The borrower benefits if the interest rate falls and loses out if interest rates rise.

Adjustable rate mortgages are characterized by their index and limitations on charges (caps). In many countries, adjustable rate mortgages are the norm, and in such places, may simply be referred to as mortgages. ARMs generally permit borrowers to lower their payments if they are willing to assume the risk of interest rate changes. In many countries, banks or similar financial institutions are the primary originators of mortgages. For banks that are funded from customer deposits, the customer deposits will typically have much shorter terms than residential mortgages. If a bank were to offer large volumes of mortgages at fixed rates but to derive most of its funding from deposits (or other short-term sources of funds), the bank would have an asset-liability mismatch: in this case, it would be running the risk that the interest income from its mortgage portfolio would be less than it needed to pay its depositors.

For the borrower, adjustable rate mortgages may be less expensive, but at the price of higher risk borne by the borrower. In most situations, when looking at a single period (e.g. a year) short-term borrowing appears less expensive than long-term borrowing, due to the slope of the yield curve. Yet, this difference is likely founded on the expectations of increases in the short term interest rate, hence the risk over many periods. Loan caps provide payment protection against payment shock, and allow a measure of interest rate certainty to those who gamble with initial fixed rates on ARM loans. There are three types of Caps on a typical First Lien Adjustable Rate Mortgage or First Lien Hybrid Adjustable Rate Mortgage.

Initial Adjustment Rate Cap: The majority of loans have a higher cap for initial adjustments that’s indexed to the initial fixed period. In other words, the longer the initial fixed term, the more the bank would like to potentially adjust your loan. Typically, this cap is 2-3% above the Start Rate on a loan with an initial fixed rate term of 3 years or lower and 5-6% above the Start Rate on a loan with an initial fixed rate term of 5 years or greater. FHA loans adjust once per year, and is capped at 1%.

Rate Adjustment Cap: This is the maximum amount by which an Adjustable Rate Mortgage may increase on each successive adjustment. Similar to the initial cap, this cap is usually 1% above the Start Rate for loans with an initial fixed term of 3 years or greater and usually 2% above the Start Rate for loans that have an initial fixed term of 5 years or greater.

Lifetime Cap: Most First Mortgage loans have a 5% or 6% Life Cap above the Start Rate (this ultimately varies by the lender and credit grade).

Adjustable rate mortgages are typically, but not always, less expensive than fixed rate mortgages. Due to the inherent interest rate risk, long-term fixed rates will tend to be higher than short-term rates (which are the basis for variable-rate loans and mortgages). The difference in interest rates between short and long-term loans is known as the yield curve, which generally slopes upward (longer terms are more expensive). The opposite circumstance is known as an inverted yield curve and is relatively infrequent. Super Jumbo loans generally offer much lower interest rates on ARMs.

The fact that an adjustable rate mortgage has a lower starting interest rate does not indicate what the future cost of borrowing will be (when rates change). If rates rise, the cost will be higher; if rates go down, the rate will be lower. In effect, the borrower has agreed to take the interest rate risk. Some studies have shown that on average, the majority of borrowers with adjustable rate mortgages save money in the long term; but they have also demonstrated that some borrowers pay more. The price of potentially saving money, in other words, is balanced by the risk of potentially higher costs.