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 Content When Markets React When markets shift, experienced investors stick to their strategy. 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. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences.