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 Should You Invest in Exchange Traded Funds? There are hundreds of ETFs available. Should you invest in them? Emotional vs. Strategic Decisions Information vs. instinct. Are your choices based on evidence of emotion? 5 Smart Investing Principles Principles that can help create a portfolio designed to pursue investment goals.