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 Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Bull & Bear Markets: A Timeline This helpful infographic will define bull and bear markets, as well as give a historical overview. Saving for College This calculator can help you estimate how much you should be saving for college.