Q:
# How do you calculate a five-year ARM mortgage?

A five-year Adjustable Rate Mortgage (ARM) is calculated based on the assumption that the interest rate remains fixed for five years followed by an index-dependent periodic amortization, when the interest rate becomes adjustable, according to Bankrate.com. Payments are then calculated based on the periodicity prescribed by the loan product.

Continue ReadingThe payments of a five-year ARM are calculated based on three factors that affect the interest rate: the initial fixed rate, the fixed margin and the variable index, according to mortgage marketplace Zillow.com. The initial fixed rate remains in effect for the initial five-year period of 60 monthly payments, after which the loan becomes adjustable for the life of the loan, according to Bankrate.com. The adjustable rate is usually calculated as the sum of the fixed margin, between 2 and 3 percent, on the loan and the variable index rate.

The index rate of most ARM loans is based on one of several indices published in the United States including the London Interbank Offered Rate (LIBOR), the one-year Treasury Bill (T-BILL) rate, the 11th District Cost of Funds Index (COFI), or the One-Year Treasury Constant Maturity index, according to Bankrate.com and SFGate.com. Once the loan becomes adjustable, the frequency of the next adjustment is also specified as 5/1, where 5 indicates the fixed rate period and 1 indicates that the index rate is adjusted once a year, according to Forbes.com.

Learn more about Financial Calculations-
Q:
## Who graphs recent mortgage rate trends?

A: Graphs of recent mortgage rate trends are available at Bankrate.com and Research.StLouisFed.org, according to Bankrate and the Federal Reserve Bank of St. ... Full Answer >Filed Under: -
Q:
## What is an ARM mortgage?

A: An adjustable-rate mortgage, or ARM, is a home loan in which the buyer gets an introductory interest rate for a defined period; then the rate is adjusted a... Full Answer >Filed Under: -
Q:
## What is a 5-year ARM loan?

A: A 5-year ARM is an adjustable-rate mortgage that maintains a fixed interest rate during the first 5 years of the loan. A typical structure is depicted as 5... Full Answer >Filed Under: -
Q:
## How do you manually calculate a mortgage payment?

A: To calculate your mortgage payment manually, apply the interest rate (r), the principal (B) and the loan length in months (m) to this formula: P = B[(r/12)... Full Answer >Filed Under: