Terms
Calculations: Having set the interest rate, the interest payment is calculated by
multiplying the rate of interest by the principal of the loan. For example,
a loan with a principal of $100,000 and annual interest rate
of 7% requires a $7,000
interest payment each year the loan agreement
is in force. For debt securities, such as bonds, this interest payment is
called a coupon and the interest rate is referred to as the coupon rate
Payment conventions:
Fixed Rate Payment: In some loan agreements, the borrower and investor agree on the rate of interest at the time the agreement is entered. If the rate of interest remains the same for the entire maturity of the loan, it is a fixed-rate loan. The borrower makes a periodic interest payment at a fixed rate during the time the agreement is in effect.
Floating rate payment: Some loan agreements charge a rate of interest that changes over the period of the agreement. Such loans are called floating rate loans. The interest rate is based on a benchmark, such as the Treasury yield or LIBOR, plus a premium based on the creditworthiness of the borrower. The premium is usually quoted as a number of basis points or additional percentage (3- month LIBOR plus 60 basis points or 6-month Treasury plus 2%). The agreement may set the interest rate at the beginning of the interest-paying period or at the time the interest payment is due, depending on the type of security.
No interest payment: Zero-coupon securities require no interest payments during the time of the agreement. The borrower receives less than the face value of the loan at the time of the agreement (i.e., the bonds are sold at a discount). A zero-coupon security charges an implied interest rate that is represented by the rate of return earned by the investor.
Example
For example, an issuer sells a $1,000 bond at a discount and
receives an amount that is less than $1,000 from the investor at
the time of the transaction. During the time the loan agreement
is in force, the borrower makes no interest payments. When the loan
is due at maturity, the borrower repays the investor $1,000