It might be intimidating to learn where and how to invest. So frightening that many individuals don’t proceed to the following step of determining how to forecast the growth of their investments. This is despite the fact that it is critical to formulating financial planning and setting goals. What if you could enter a few figures into a simple formula to determine how long it would take for your investments to double? That is exactly what the Rule of 72 does. Here’s everything you need to know about how it works and why it’s an important tool to have in your investment arsenal. What is the Rule of 72? The Rule of 72 is a mathematical principle that estimates the time it will take for an investment to double in value. The rule only applies to compounding growth or decay. In other words, you can only earn compound interest, not simple interest....