It Was the Best of Times, It Was the Worst of Times All about how missing the best market days (or the worst!) might affect your portfolio. Share | Related Content 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. All Muni Bonds Are Not Created Equal Gaining a better understanding of municipal bonds makes more sense than ever. What Is the Dividend Yield? This calculator helps determine your pre-tax and after-tax dividend yield on a particular stock.