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 Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year. Consider Keeping Your Life Insurance When You Retire Reasons to retain your coverage into your retirement years. Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction.