5 Smart Investing Principles The slideshow presentation that you would like to view is too large for your current screen resolution. Click here to view to view the slideshow at full resolution. Launch Presentation » Share | Related Content Should You Invest in Exchange Traded Funds? There are hundreds of ETFs available. Should you invest in them? How Stocks Work Understanding how a stock works is key to understanding your investments. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.