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 Question 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. All Muni Bonds Are Not Created Equal Gaining a better understanding of municipal bonds makes more sense than ever. 5 Smart Investing Principles Principles that can help create a portfolio designed to pursue investment goals.