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 Content What Smart Investors Know Savvy investors take the time to separate emotion from fact. Your Shifting Risk Tolerance Time and market performance may subtly and slowly imbalance your portfolio. What Is the Dividend Yield? This calculator helps determine your pre-tax and after-tax dividend yield on a particular stock.