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 | Related Content Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference? The Business Cycle Understanding the economy's cycles can help put current business conditions in better perspective. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences.