Answer:
margin amount
Step-by-step explanation:
Adjustable rate loan has a defined interest rate associated with it for an initial period, further after that the interest is decided by adding an indexed rate + the margin rate depending upon certain other factors.
It is also called as the floating rate loan, and the margin is not fixed it keeps on changing with the change in period.
It might be six monthly, monthly, or quarterly or in any period of interval.
This provides for the calculation each time that is different. As margin is the additional added amount which differs each time.