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? The Utility of Sector Investing Successful sector investing is dependent upon an accurate analysis about when to rotate in and out. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.