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? Name Email Address Message Thank you! Oops! Related Content Should I Invest in Gold? Learning more about gold and its history may help you decide whether it has a place in your portfolio. Best-Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. What Is My Risk Tolerance? This questionnaire will help determine your tolerance for investment risk.