The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Your Shifting Risk Tolerance Time and market performance may subtly and slowly imbalance your portfolio. Medicare Advantage 101 Overview of Medicare Advantage, what’s in them, special rules, and more. The Real Cost of a Vacation Home What if instead of buying that vacation home, you invested the money?