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? Best Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. 5 Smart Investing Strategies Getting what you want out of your money may require the right game plan.