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 Contents Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference? All Muni Bonds Are Not Created Equal Gaining a better understanding of municipal bonds makes more sense than ever. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences.