The rule of 70 is a calculation that estimates the number of years it takes for investments to double in amount at a specific, constant rate of return. It is frequently used when comparing investments ...

The Rule of 70 is a mathematical formula used to estimate the time it takes for an investment or any quantity to double, given a fixed annual growth rate. This rule is used by investors and financial ...

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 ...

Six key investing rules aid in estimating returns, managing risk, and planning. Financial planning rules: 72, 114, 144, 70, 110, and 3-6 Rule These rules can help grow wealth and guard against ...