Simplicty and flexibility!

Rate

# rate

#### Type

Financial Function

#### Purpose

The rate function calculates the interest rate of a financial transaction given the presentvalue, futurevalue, installment payment, and the number of payment periods.

Syntax

Returns

A numeric value (the interest rate).

Usage

If the installment payment increases the value of the investment (e.g., an annuity), the installment is expressed as a positive amount. If the payment decreases the value of the investment (e.g., loan amortization), the installment is expressed as a negative amount.

The interest rate, installment payments, and time periods must be based on the same terms. If payments are made monthly, periods is computed as the number of years * (multiplied by) 12 and rate is computed as 1/12 of the annual rate.

Example 1

12 * rate( 12000, 0, -289, 48)

Returns: 7.3

This example calculates the annual interest rate on a \$12,000 car loan to be repaid in 48 monthly payments of \$289.

Example 2

12 * rate( 0, 20000, 250, 60)

Returns: 10.2

This example calculates the annual interest rate required to accumulate \$20,000 in savings, if you begin with no money in the account and make monthly payments of \$250 over a period of 5years.

Note: DataEase financial functions are derived from the formula shown below. (The double asterisks (meaning "raise to the power") cannot be used in a script).

futurevalue = principal * ((1 + (rate/100)) ** periods) + (installment/(rate/100)) * (((1+ (rate/100)) ** periods) - 1)

When typing fractions like 10 / 12, DataEase requires that you type a space before and after the / division symbol.

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[@EOF@]...

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