Adjustable Rate Mortgages (ARMs) have become on of the most popular and effective tools for helping some prospective homebuyers achieve their dream of homeownership. Developed during a time of high interest rates that kept many people out of the housing market, the ARM offers lower initial rates by sharing the future risk of higher rates between borrower and lender.

Adjustable-rate mortgages (ARMs) are loans with interest rates that change. ARMs may start with lower monthly payments than fixed-rate mortgages. Note, with a fixed rate mortgage (FRM), monthly payments will be steady, while with an adjustable rate mortgage (ARM), payments will vary over time. Adjustable rate mortgages typically have an initial fixed rate lower than that of a comparable fixed rate mortgage. The initial fixed rate period is followed by adjustment intervals. Given that you plan to stay in the home for a limited time period, a couple of years or so, an adjustable mortgage may be a great option. The main parts of benefits of an initial low interest rate will be gained during this period.

Each ARM has four basic components:

• Initial interest rate, which is typically one to three percentage points lower than that of most fixed rate mortgages.
• Adjustment interval, at the time between changes in the interest rate and/or monthly payment will be.
• Index, against which lenders measure the difference between what they are making on their investment in the mortgage and what they could be making on other types of investments.
• Margin, or the additional amount the lender adds to the index to establish the adjusted interest rate on an ARM. The margin is usually 1.5 percent to 2.5 percent.

An ARM can be a great solution for borrowers with bad credit who have a reasonable time frame for paying off the loan by refinancing or selling. Plan to get your finances in order to achieve this. Then make a back up plan in case the first one doesn't work. The number of bad credit mortgage foreclosures today is evidence that depending on luck to pay your mortgage can cause you to lose your home. Your bottom line should be that if you can't get out of a bad credit mortgage and into a conventional or FHA loan within five years you should probably consider putting off home ownership and get some financial counseling.

The rate on your adjustable rate mortgage is determined by some market index. Many adjustable rate mortgages are tied to the LIBOR, Prime rate, Cost of Funds Index, or other index. The interest rate cap structure provides some protection from large interest rate swings. There are two types of caps: (1) annual, and (2) life-of-the-loan. The annual cap restricts the amount your interest rate can change, up or down, in any given year, while the life-of-the-loan cap limits the maximum (and minimum) interest rate you can pay for as long as you have the mortgage.

With a lower adjustable interest rate the monthly amount will be less. You may therefore qualify for a larger mortgage, or you may qualify for a loan easier. Lenders use your gross monthly income and your monthly mortgage payment to determine how much you can qualify for. If current interest rates are very high, this could be the only loan choice available to you. But if you are risk avert, maybe this is not be the option for you.