Desde Investopedia

TERM OF THE DAY

Rule Of 70 The rule of 70 is a way to estimate the number of years it takes for a certain variable to double. To estimate the number of years for a variable to double, take the number 70 and divide it by the growth rate of the variable. This rule is commonly used with an annual compound interest rate to quickly determine how long it takes to double your money.

Breaking it Down: Another useful application of the rule of 70 is in the area of estimating how long it would take a country's real GDP to double. Similar to calculating compound... Read More