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Adjustable Rate MortgageAn adjustable rate mortgage (ARM) is a mortgage loan where the interest rate on the note is periodically adjusted based on a variety of indexes.[1]. Among the most common indexes are the rates on 1-year constant-maturity Treasury (CMT) securities, the Cost of Funds Index (COFI), and the London Interbank Offered Rate (LIBOR). A few lenders use their own cost of funds as an index, rather than using other indexes. 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 mortage, 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 rates 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.
Adjustable-rate mortgages (ARMs) are loans with interest rates that change. ARMs may start with lower monthly payments than fixed-rate mortgages, but keep the following in mind:
You need to compare features of ARMs to find the one that best fits your needs. See the Mortgage Shopping Worksheet. This handbook explains how ARMs work and discusses some of the issues that borrowers may face. It includes ways to reduce the risks and gives some pointers about advertising and other ways you can get information from lenders and other trusted advisers. Important ARM terms are defined in a glossary. And the Mortgage Shopping Worksheet can help you ask the right questions and figure out whether an ARM is right for you. Ask lenders to help you fill out the worksheet so you can get the information you need to compare mortgages.
What Is an ARM?An adjustable-rate mortgage differs from a fixed-rate mortgage in many ways. With a fixed-rate mortgage, the interest rate stays the same during the life of the loan. With an ARM, the interest rate changes periodically, usually in relation to an index, and payments may go up or down accordingly.Shopping for a mortgage is not as simple as it used to be. To compare two ARMs with each other or to compare an ARM with a fixed-rate mortgage, you need to know about indexes, margins, discounts, caps on rates and payments, negative amortization, payment options, and recasting (recalculating) your loan. You need to consider the maximum amount your monthly payment could increase. Most important, you need to know what might happen to your monthly mortgage payment in relation to your future ability to afford higher payments.
Lenders generally charge lower initial interest rates for ARMs than for fixed-rate mortgages. At first, this makes the ARM easier on your pocketbook than a fixed-rate mortgage for the same loan amount. Moreover, your ARM could be less expensive over a long period than a fixed-rate mortgage--for example, if interest rates remain steady or move lower.
Against these advantages, you have to weigh the risk that an increase in interest rates would lead to higher monthly payments in the future. It's a trade-off--you get a lower initial rate with an ARM in exchange for assuming more risk over the long run.
Here are some questions you need to consider:
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