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 Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference? 4 Reasons for the Return of Market Volatility Why have the markets been so volatile recently? What Is the Dividend Yield? This calculator helps determine your pre-tax and after-tax dividend yield on a particular stock.