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Rule of 72 explained: estimate how fast money grows

The Rule of 72 is a simple yet powerful tool for estimating how long it will take for an investment to double at a given annual compound interest rate. By dividing 72 by the interest rate, investors ...
The Daily Gazette

Rule of 72: What it is and how to use it

You don’t need a finance degree to figure out how long it’ll take to double your money as an investor. The Rule of 72 offers a quick shortcut to estimate growth based on interest rates or, on the flip ...
Nasdaq

Rule of 55 vs Rule 72(t): What’s the Difference?

If you try to withdraw early from just about any retirement plan, you'll be slapped with a penalty—an incentive to leave your money alone and let it build toward retirement like you always intended.