Interest Rate
The rate expressed as a percentage of the principal amount of a bond used to determine the amount of interest to be paid by the issuer or the borrower.
An Interest Rate which is set at the time a Bond is issued and which does not vary during the term of the Bond.
The rate expressed as a percentage of the principal amount of a bond used to determine the amount of interest to be paid by the issuer or the borrower.
The interest rate on a bond which varies according to a formula set forth in the bond or the indenture or bond resolution/ordinance or based on the interest rate required by a remarketing agent to remarket the bonds at par.

Rule outlined in Section 147(b) of the code that states private activity bonds are not tax-exempt bonds if the weighted average maturity of the bond issue exceeds 120% of the average reasonably expected economic useful life of the facilities financed with the bond proceeds.