The Rule of 72 becomes even more eye-opening when you think about higher returns. A stock market index fund averaging 8% ...

To calculate the Rule of 72, you divide the number 72 by the rate of return of an investment or account. The Rule of 72 can only be used on investments earning compound interest; it's most ...

The Rule of 72 is a straightforward formula used to estimate the time required for an investment to double. It works by dividing the number 72 by the fixed annual rate of return. Formula ...