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? The ABCs of Zero Coupon Bonds Understanding some basic concepts may help you assess whether zero-coupon bonds have a place in your portfolio. 5 Smart Investing Strategies Getting what you want out of your money may require the right game plan.