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Adjustable-Rate-Mortgage (ARM) loans
An adjustable-rate mortgage (ARM) is a home loan
with an interest rate that is flexible and subject to adjustment on
specific dates or based on certain market conditions. This means that
the monthly payments can go up or down.
Generally, the initial interest rate could be lower
or higher than that of a comparable fixed-rate mortgage. After that
initial period ends, interest rates — and your monthly payments — can
rise or fall.
An ARM can be beneficial for homebuyers looking to
keep the loan for a limited period and/or who can afford the potential
increase in interest rate over time.
What are the requirements for an adjustable-rate mortgage?
The basic requirements
for an ARM loan include a credit score of at least 620 and a debt-to-income
ratio (DTI) of 50 percent or less. Further requirements
depend on whether you get a conventional, FHA or VA or an ARM loan.
Types of ARMs
ARMs are generally 30-year mortgages, but they can
vary a lot in how often the fixed rate lasts and how often the rates
change once you’re into the variable-rate period. Here are the some
typical loan terms:
F/A ARM. e.g., 3/6 and 3/1
ARMs: 3/6 and 3/1 ARMs have a fixed (F) introductory rate for
the first three years of the mortgage, then switch to an adjustable rate
for the remaining 27 years. 3/6 ARMs adjust (A) every six months, whereas
3/1 ARMs adjust (A) yearly.
ARM Loan Cap Structure: M/N/P ARM Loan Cap Structure:
The first number, M, is the initial cap. This means the
number of percentages points your rate can increase when it first
starts adjusting.
The second number, N, is the periodic cap.
This is the number of percentage points your rate can increase with each
adjustment after the first one.
The third number, P, is the lifetime cap.
This is the total number of percentage points your rate can increase
over the life of the loan.
Example: 5/1 ARM Loan Payment with 2/2/5 Cap
structure for initial borrowing amount of $450,000 with an initial
interest rate of 6.25%.
|
ARM adjustment period |
Interest rate |
Monthly payment (principal and
interest) |
Description |
|
Initial five-year fixed rate |
6.25% |
$2,770.73 |
Your monthly payment for the first five
years. |
|
First adjustment cap (2
percentage points above the start rate) |
8.25% |
$3,380.70 |
The highest your monthly payment
could be the first time it adjusts Year 6th. |
|
Second adjustment cap (2
percentage points above the start rate) |
10.25% |
$4,032.46 |
The highest your monthly payment
could be after the first time it adjusts Year 7th. |
|
Third adjustment cap (2
percentage points above the start rate) |
12.25%*
11.25%
|
$4,370.68 |
The highest your monthly payment
could be after the second time it adjusts Year 8th. |
|
Lifetime adjustment cap
(5 percentage points above the start rate) |
11.25% |
$4,370.68 |
The highest your monthly payment
could be at any adjustment. Year 9th and after |
If you don’t refinance
to a fixed rate before your ARM resets, you could pay an
extra $609.97 per month on your mortgage payment with the first
adjustment. In the worst-case scenario, the monthly payment would jump
up by $1,599.95 in the remaining of the loan time.
Time since the original loan closed. How
long you’ll have to wait to refinance varies based on your loan program
and what type of refinance you’re seeking.
If you’re worried about your interest
rate changing in the future but need the flexibility of a
lower initial rate, ask your lender whether they offer an ARM loan
with a conversion option. This allows you to “convert” your loan to
a fixed rate in the future without having to refinance. There may be a
fee to use the conversion option, so make sure you understand how any
conversion clause works and how much it costs.
What index is used with a 5/1 ARM?
The index is important to understand because it’s
the “moving” part of your adjustable rate and fluctuates with changes in
the market. Your lender decides which index will be used. Most current
ARM programs use the Cost of Funds Index (COFI), the one-year
Constant Maturity Treasury (CMT) securities index and SOFR
(Secured
Overnight Financing Rate).
The SOFR Averages are compounded averages of the SOFR over rolling 30-,
90-, and 180-calendar day periods.
You may hear the term “fully indexed,” which simply
refers to how much your rate will be when your margin and index are
added together. To find out what your fully indexed rate would be, you
simply add the current index rate to your margin. For example, if the
CMT index rate is currently 2%, and your margin is 5%, then your fully
indexed rate would be 7%.
Interest-only ARM
Interest-only ARMs are adjustable-rate mortgages in
which the borrower only pays interest (no principal) for a set period.
Once that interest-only period ends, the borrower starts making full
principal and interest payments.
The interest-only period might last a few months to a few years. During
that time, the monthly payments will be low (since they’re only
interest), but the borrower also won’t build any equity
in their home (unless the home appreciates in value).
Payment-option ARM
With a payment-option ARM, borrowers select their
own payment structure and schedule, such as interest-only; a 15- 30- or
40-year term; or any other payment equal to or greater than the minimum
payment. (The minimum payment is based on a typical 30-year amortization
with the initial rate of the loan.)
A payment-option ARM, however, could result in negative
amortization, meaning the balance
of your loan increases
because you aren’t paying enough to cover interest. If the balance rises
too much, your lender might recast the loan and require you to make
much larger, and potentially unaffordable, payment.
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