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? Four Really Good Reasons to Invest There are four very good reasons to start investing. Do you know what they are? Saving for College This calculator can help you estimate how much you should be saving for college.