The Rule of 72 is a shortcut or rule of thumb used to estimate the number of years required to double your money at a given annual rate of return and vice versa.

Compound interest is the phenomenon that allows seemingly small amounts of money to grow into large amounts over time. Compound interest essentially means "interest on the interest" and is the ...

Simple interest is based on the principal amount of a loan, while compound interest is based on the principal plus accumulated interest. Learn more in our guide.

The Power of Compound Interest: How to Turn Small Investments Into Big Wealth The key is understanding how it works and how to maximize its potential to build financial security.