If you have ever wondered how long it will take for your savings or investment to double, there is a surprisingly easy way to estimate it. You don’t need a ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

Remember though, the Rule of 72 is designed to be a rough estimate and its assumptions aren't always realistic. It assumes a constant rate of return, and stock returns are anything but constant. The ...

The rule assumes a 5% annual withdrawal rate and a 5% annual return. “The $1,000-per-month rule is designed to help you estimate the amount of savings required to generate a steady monthly income ...