Bursting the Bubble Tulips were the first, but they won’t be the last. What forms a “bubble” and what causes them to burst? Share | Have A Question About This Topic? Address Thank you! Oops! Related Contents Should You Invest in Exchange Traded Funds? There are hundreds of ETFs available. Should you invest in them? You Would Rather Be... Are you a thrill seeker, or content to relax in the backyard? Use this flowchart to find out more about your risk tolerance. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.