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? Name Email Address Question Thank you! Oops! Related Contents What Is the Dividend Yield? This calculator helps determine your pre-tax and after-tax dividend yield on a particular stock. Saving for College This calculator can help you estimate how much you should be saving for college. Impact of Taxes and Inflation Estimate the potential impact taxes and inflation can have on the purchasing power of an investment.