Rule of 72 investment doubling formula illustration with growth chart

Unlocking the Magic of the Rule of 72: Your Key to Doubling Investments

Direct Answer: The Rule of 72 is a quick formula to estimate how long an investment takes to double: divide 72 by the expected annual rate of return. For example, at 12% (a historical equity mutual fund average), your money doubles in roughly 6 years; at 7-8% (post office savings or FDs), it takes 9-10 […]