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 Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference? Getting a Head Start on College Savings A few strategies that may help you prepare for the cost of higher education. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences.