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 | Have A Question About This Topic? Address Thank you! Oops! Related Contents 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. Options When Your CD Matures Knowing your options when a CD matures can help you make a sound investment decision. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.