Should You Invest in Exchange Traded Funds? There are hundreds of ETFs available. Should you invest in them? Share | Related Content Bursting the Bubble Tulips were the first, but they won’t be the last. What forms a “bubble” and what causes them to burst? Types of Stock Market Analysis Most stock market analysis falls into three broad groups: Fundamental, technical, and sentimental. Here’s a look at each. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.