Anyone who believes that exponential growth can go on forever in a finite world is either a madman or an economist.
- Kenneth Boulding
A Clojure library designed to help you calculate financial decision for investments.
(deftest basic-return-on-investment-test
(testing "basic return of interest"
(is (=
(return-of-interest-at-fixed-rate-for-given-years 100 5 1)
105.0))))
(deftest return-on-investment-test
(testing "return of interest after two years"
(is (=
(return-of-interest-at-fixed-rate-for-given-years 100 5 2)
110.25))))
(deftest years-to-double-investment-at-fixed-rate-test
(testing "time it takes to double an investment"
(is (=
(years-to-double-investment-at-fixed-rate 5)
15))))
(deftest net-capital-value-one-year-test
(testing "the net capital value of a one year investment"
(is (close-to
(net-capital-value-one-year-investment 40 70 10)
23.636364
1e-4))))
(deftest net-capital-value-over-periods-3-periods-test
(testing "the net capital value of a 3 year investment with an interest rate of 4 %"
(is (close-to
(net-capital-value-over-periods 22 [[4 4] [10 4] [12 4]])
1.7596723
1e-4))))Copyright © 2022 Simon Neutert
This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0 which is available at http://www.eclipse.org/legal/epl-2.0.
This Source Code may also be made available under the following Secondary Licenses when the conditions for such availability set forth in the Eclipse Public License, v. 2.0 are satisfied: GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version, with the GNU Classpath Exception which is available at https://www.gnu.org/software/classpath/license.html.