Forecast The market is as unpredictable as the weather. We’d love to help you prepare. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content 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. Bank on Your Good Health How to lower your risk of chronic illness Infographic: 2019 Taxes by the Numbers Here are the official tax numbers for 2019.