Periodic interest rate
Periodic interest rate
Periodic interest rate is a loan's rate of interest, converted to be applicable to a time period other than one year. Interest rates are normally based on one year, but sometimes it's useful to know the rate to be charged over one week, one month or one quarter. These are periodic rates, and they're determined by extrapolation. If the rate on a loan is 10 percent, the periodic rate used to calculate one quarter's interest is 2.5 percent.
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