Mortgage Calculators and Adjustable Rate Mortgage Index

The greatest amount of unease for most borrowers while shopping for a home loan is contemplating the interest rate on the mortgage.  Obtaining the most competitive rate would by and large be deemed the number one target.  The goal of obtaining the lowest rate applies when searching for the optimal adjustable rate mortgage as well.  When analyzing the various adjustable rate mortgages available the use of a mortgage calculator can be especially valuable.  With adjustable rate mortgages there are numerous factors to consider before choosing the best loan to fit the desired goal.  The mechanics of setting the interest rate for an adjustable rate mortgage is often different between the various adjustable rate mortgages.  These formulas can be input in an adjustable rate mortgage calculator to compare the impact of changing the different loan attributes.

Adjustable rate mortgages are loans with interest rates that change.  Adjustable rate mortgages will generally start with a lower interest rate than fixed rate mortgages and when using a mortgage calculator to compare payments the result will generally show the adjustable rate mortgage having the lower payment.  To compare two adjustable rate mortgages with each other or to compare an adjustable rate mortgage with a fixed rate mortgage, you need to know the adjustable rate mortgage index, the margin, discounts, caps on rates and payments, negative amortization and payment options.  A borrower will need to reflect on the maximum amount that the monthly payment could increase.  Most importantly, the borrower needs to know what might happen to the monthly mortgage payment in relation to the borrower’s future ability to afford higher payments.  With the vast number of variables required to calculate the possible mortgage payment outcomes, the adjustable rate mortgage payment calculator is well suited to handle this task.

The initial rate and payment amount on an adjustable rate mortgage will remain in effect for a limited period of time, ranging from just 1 month to 5 years or more.  For some adjustable rate mortgages, the initial rate and payment can vary greatly from the rates and payments later in the loan term.  Even if interest rates are stable, the rates and payments could change measurably.  This initial rate period is called the start rate.  The mortgage loan payment is initially established at this start rate and it is important that this number be entered into the mortgage calculator.

With most adjustable rate mortgages, the interest rate and monthly payment change every month, quarter, year, 3 years, or 5 years after the start rate period ends.  The period between rate changes is called the adjustment period.  This change period and maximum change amount should be properly evaluated and entered into the mortgage payment calculator.

The interest rate set on an adjustable rate mortgage is made up of two elements.   The index is the base rate that will fluctuate with the market, which is the interest rate for the loan will be based on.  The margin is a set amount that is added to the index to establish the interest rate.  The index is a measure of interest rates generally, and the margin is an extra amount that the lender adds that will not change overtime.  The payments on the home loan will be affected by any caps, or limits, on how high or low the rate can go during adjustment periods.  If the index rate moves up, the interest rate on the loan will also go up and so will the mortgage payments.  If the index rate goes down, the monthly payment could go down.  The changes are determined by the index, the margin added and the maximum changes allowed per the terms of the loan.  The adjustable rate mortgage payment calculator allows the user to input each of these variables to determine the present rate and allows the user to make changes to see how the rate and payment may be impacted when the index fluctuates.

Lenders base adjustable rate mortgage rates on a variety of indexes.  The index for any particular loan is established at the time of application.  When searching for an adjustable rate mortgage borrowers should review the various components that determine how interest rate is established on these home loans.  The primary attention should be on which index the adjustable rate mortgage is based.  Among the most common indexes are the rates on 1-year constant-maturity Treasury securities, 3 year and 5 year constant maturity Treasury securities, the Cost of Funds Index (COFI), the London Interbank Offered Rate (LIBOR) and the prime rate.  Before applying for an adjustable rate mortgage, the use of the mortgage calculator is vital to evaluate the value of the existing index the loan is based on, the margin compared to different adjustable rate mortgages loans based on their index and margin.

Once all the information is entered into the mortgage calculator, you can have a more manageable set of numbers to help you decide what type of mortgage plan fits your budget.  The mortgage calculator can help a borrower decide which of the mortgage indexes they should select based on the lowest interest cost and potential for future change.

Analyzing the index the adjustable rate mortgage is based on is an often overlooked process that results in borrowers obtaining less than optimal loans for their needs and even loans that result in drastic payment shock.  Before taking out a home loan based on an adjustable rate mortgage, the mortgage calculator can be a critical tool for helping a borrower plan their mortgage based on today’s payment parameters and future payments changes and therefore make a more qualified selection before committing to a mortgage.

This entry was posted on Thursday, December 11th, 2008 at 10:35 pm and is filed under Mortgage Articles. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.