Function future_value_schedule_solution

pub fn future_value_schedule_solution<T>(
    rates: &[f64],
    present_value: T,
) -> TvmScheduleSolution
where
    T: Into<f64> + Copy,

Calculates a future value based on rates that change for each period, returning a struct with all of the inputs and results.

Related functions:

• For simply calculating a single future value using a fixed rate use [future_value].
• To calculate a future value with a fixed rate and return a struct that shows the formula and optionally produces the the period-by-period values use future_value_solution.
• To calculate the future value if the rates vary by period use future_value_schedule.

Arguments

• rates - A collection of rates, one for each period.
• present_value - The starting value of the investment.

Panics

The call will fail if any of the rates is less than -1.0 as this would mean the investment is losing more than its full value.

Examples

Calculate the value of an investment whose rates vary by year.

use finance_solution::*;
// The rates vary by year: 8.1% followed by 11%, 4%, and -2.3%.
let rates = [0.081, 0.11, 0.04, -0.023];

// The initial investment is $10,000.
let present_value = -10_000.00;

let solution = future_value_schedule_solution(&rates, present_value);
dbg!(&solution);

let future_value = solution.future_value();
dbg!(&future_value);
assert_rounded_4(future_value, 12_192.0455);

// Calculate the value for each period.
let series = solution.series();
dbg!(&series);

Error case: One of the rates shows a drop of over 100%. There’s no way to work out what this means so the call will panic.

let rates = [0.116, -100.134, -0.09, 0.086];
let present_value = -4_000.00;
let schedule = future_value_schedule(&rates, present_value);