What is a 'Cap'

The highest point to which an adjustable rate mortgage (ARM) can rise in a given time period or the highest rate that investors can receive on a floating-rate type bond. The issuer typically sets the cap at the time the contract is issued. With an ARM, it is detailed in the terms of the mortgage document.

BREAKING DOWN 'Cap'

Homeowners that have adjustable rate mortgages (ARMs), which vary based on an underlying benchmark such as the prime rate, experience a fluctuation in their monthly mortgage interest rates. However, the amount by which the percentage rate on the loan can increase in a given period (typically quarterly) is capped at a certain rate. This is a safeguard for homeowners in case interest rates rise dramatically in a short period of time.

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