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 Message Thank you! Oops! Related Content The Business Cycle How will you weather the ups and downs of the business cycle? The Anatomy of an Index The S&P 500 represents a large portion of the value of the U.S. equity market, it may be worth understanding. How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset.