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 The Junk Drawer Approach to Investing It's easy to let investments accumulate like old receipts in a junk drawer. Your Shifting Risk Tolerance Time and market performance may subtly and slowly imbalance your portfolio. Saving for College This calculator can help you estimate how much you should be saving for college.