Thursday, May 28, 2009

Interest-rate caps

An interest-rate cap places a limit on the amount your interest rate can increase. Interest caps come in two versions:
  • periodic adjustment caps, which limit the amount the interest rate can adjust up or down from one adjustment period to the next after the first adjustment, and
  • lifetime caps, which limit the interest-rate increase over the life of the loan. By law, virtually all ARMs must have a lifetime cap.
Periodic adjustment caps
Let's suppose you have an ARM with a periodic adjustment interest- rate cap of 2%. However, at the first adjustment, the index rate has risen 3%. The following example shows what happens.

In this example, because of the cap on your loan, your monthly payment in year 2 is $138.70 per month lower than it would be without the cap, saving you $1,664.40 over the year.

Some ARMs allow a larger rate change at the first adjustment and then apply a periodic adjustment cap to all future adjustments.

A drop in interest rates does not always lead to a drop in your monthly payments. With some ARMs that have interest-rate caps, the cap may hold your rate and payment below what it would have been if the change in the index rate had been fully applied. The increase in the interest that was not imposed because of the rate cap might carry over to future rate adjustments. This is called carryover. So at the next adjustment date, your payment might increase even though the index rate has stayed the same or declined.

The following example shows how carryovers work. Suppose the index on your ARM increased 3% during the first year.

Because this ARM limits rate increases to 2% at any one time, the rate is adjusted by only 2%, to 8% for the second year. However, the remaining 1% increase in the index carries over to the next time the lender can adjust rates. So when the lender adjusts the interest rate for the third year, the rate increases by 1%, to 9%, even if there is no change in the index during the second year.

In general, the rate on your loan can go up at any scheduled adjustment date when the lender's standard ARM rate (the index plus the margin) is higher than the rate you are paying before that adjustment.

Lifetime caps
The next example shows how a lifetime rate cap would affect your loan. Let's say that your ARM starts out with a 6% rate and the loan has a 6% lifetime cap—that is, the rate can never exceed 12%. Suppose the index rate increases 1% in each of the next 9 years. With a 6% overall cap, your payment would never exceed $1,998.84-compared with the $2,409.11 that it would have reached in the tenth year without a cap.

Payment caps
In addition to interest-rate caps, many ARMs—including payment-option ARMs—limit, or cap, the amount your monthly payment may increase at the time of each adjustment. For example, if your loan has a payment cap of 7½%, your monthly payment won't increase more than 7½% over your previous payment, even if interest rates rise more. For example, if your monthly payment in year 1 of your mortgage was $1,000, it could only go up to $1,075 in year 2 (7½% of $1,000 is an additional $75). Any interest you don’t pay because of the payment cap will be added to the balance of your loan. A payment cap can limit the increase to your monthly payments but also can add to the amount you owe on the loan. (This is called negative amortization.)

Let's assume that your rate changes in the first year by 2 percentage points but your payments can increase no more than 7½% in any one year. The following graph shows what your monthly payments would look like.

While your monthly payment will be only $1,289.03 for the second year, the difference of $172.69 each month will be added to the balance of your loan and will lead to negative amortization.

Some ARMs with payment caps do not have periodic interestrate caps. In addition, as explained below, most payment-option ARMs have a built-in recalculation period, usually every 5 years. At that point, your payment will be recalculated (lenders use the term recast) based on the remaining term of the loan. If you have a 30-year loan and you are at the end of year 5, your payment will be recalculated for the remaining 25 years. The payment cap does not apply to this adjustment. If your loan balance has increased, or if interest rates have risen faster than your payments, your payments could go up a lot.

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