This article discusses adjustable rate mortgage loan. Adjustable mortgage loans (AMLs), also known as adjustable-rate mortgages, can now be used by virtually every kind of mortgage lender. They are good financing instruments and may help to solve the housing crunch. Reason: Lenders can definitely lend and borrowers have an affordable way to borrow. Also: Neither takes undue risk. The risk is shared. See mortgage loan for more information.
Major difference between the new AMLs and the older variable-rate mortgages (VRMs):
AMLs have no cap on the upward movement of interest rates over the life of a loan (although there is a 2% cap on annual changes in the rate.) Result: If the interest rates rise, your mortgage interest may go up by the same amount. On the other hand, your mortgage could drop sharply if rates go down (lenders don't have to drop your mortgage rate, however).

Although the note can vary at any time and by any amount, the lender must peg its mortgage interest rate to a rate known to the public and not controlled by the bank. Example: It could be pegged to the Treasury-bill rate but not to the bank's prime.
Lender restraints:
Many states' banking laws provide ceilings on raises in a given year.
The competitiveness of the mortgage industry will result in sweeteners. Example: A bank may limit yearly raises to a maximum of two percentage points.
Borrower disadvantages:
With AML financing, a home purchase will not be as inflation-proof as it once was.
Barring a lender- or state-imposed cap on interest rate rises, carrying costs could skyrocket.

The bank has the option of increasing your interest rate but not your monthly payment, and extending the payment period to 40 years.
Example: If your monthly payment is $400, of which $375 is interest and $25 is principal, and interest rates go up, the bank may keep your payment at $400. But it may make the interest payment $380 and the principal payment $20 and extend your payment period accordingly.

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A severe swing in interest rates could result in what is known as negative amortization.
What can happen: Say your monthly payment is $400 for 20 years at 12 %. Interest rates soar to 18 %. The bank, seeing that it would have to raise your payments to more than $600 to amortize your mortgage in the same 20-year period at the higher rates, decides to keep your monthly payment at $400 but make that purely an interest payment (no principal). Each month, the principal that you are not paying accumulates, with interest. If the interest rates stay near 18 % for any period of time, you will owe a substantial balloon (lump-sum) payment after 20 years instead of owning your house free and clear.

Recommendation: Ask your bank if it will give a fixed-rate mortgage. Despite the use of AMLs, fixed-rate loans are not dead. Preference: Fixed-rate loans, if and when they are available at a reasonable premium over AML rates. The competitiveness of the mortgage industry should keep them alive for some time. Option: Some lenders may offer you the choice of an AML or fixed-rate mortgage.
Whether to pick an AML at the lower starting rate or a fixed-rate mortgage at higher interest depends partly on where you (or the people you rely on for financial advice) see interest rates going over the long term. But if the lender offers you an AML at 7 % or a fixed-rate mortgage at 8 %, grab the fixed rate at 15 % .

Protect Mortgage Point Deduction: "Points" paid to get a mortgage loan may not be immediately tax-deductible.
Interest must actually be paid to be deductible by cash-basis taxpayers, which most individuals are. In one case, the Tax Court held that, since the points were deducted from the loan proceeds, they weren't actually paid, thus no deduction could be claimed that year. The deduction would have to be taken prorate as the mortgage was repaid.
Problem: The typical real estate closing statement mixes up credits to the buyer and amounts actually paid.
Solution: Pay the points by single check to the lender. Don't lump the payment in with other payments.