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? Address Thank you! Oops! Related Contents It Was the Best of Times, It Was the Worst of Times All about how missing the best market days (or the worst!) might affect your portfolio. Earnings for All Seasons Earnings season can move markets. What is it and why is it important? Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences.