Function finance_solution::net_present_value_schedule

pub fn net_present_value_schedule<C>(rates: &[f64], cashflows: &[C]) -> f64 where
    C: Into<f64> + Copy, 

Returns the net present value of a schedule of rates and cashflows (can be varying), subtracting the initial investment cost. Returns f64.

Examples

Net Present Value of a series of -$1000 investment which will payback $500 yearly for 10 years.

use finance_solution::*;
let (rates, cashflows) = (vec![0.034, 0.089, 0.055], vec![-1000, 200, 300, 500]);

// Find the present value of this scenario.
let net_present_value = net_present_value_schedule(&rates, &cashflows);

// Confirm that the present value is correct to four decimal places (one hundredth of a cent).
assert_approx_equal!(-127.8016238, net_present_value);
 
// present_value(0.034, 1, 200): $193.42
// present_value(0.089, 2, 300): $252.97
// present_value(0.055, 3, 500): $425.81
// initial investment:          -$1000
// sum of the above:            -$127.80 (net present value)