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 What Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement. The Anatomy of an Index The S&P 500 represents a large portion of the value of the U.S. equity market, it may be worth understanding. Saving for College This calculator can help you estimate how much you should be saving for college.