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 Should You Invest in Exchange Traded Funds? There are hundreds of ETFs available. Should you invest in them? The Business Cycle Understanding the economy's cycles can help put current business conditions in better perspective. 5 Smart Investing Strategies Getting what you want out of your money may require the right game plan.