How Stocks Work Full Size Version Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents 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. Mutual Funds vs. ETFs Exchange-traded funds have some things in common with mutual funds, but there are differences, too. What Is My Risk Tolerance? This questionnaire will help determine your tolerance for investment risk.