Adjustable rate Applies mainly to convertible securities. Refers to interest rate or dividend that is adjusted periodically, usually according to a standard market rate outside the control of the bank or savings institution, such as that prevailing on Treasury bonds or notes. Typically, such issues have a set floor or ceiling, called caps and collars that limits the adjustment.
Adjustable rate mortgage (ARM)
Adjustable rate mortgage (ARM) A mortgage that features predetermined adjustments of the loan interest rate at regular intervals based on an established index. The interest rate is adjusted at each interval to a rate equivalent to the index value plus a predetermined spread, or margin, over the index, usually subject to per-interval and to life-of-loan interest rate and/or payment rate caps.