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 Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Asset Allocation Consider how your assets are allocated and if that allocation is consistent with your time frame and risk tolerance. Saving for College This calculator can help you estimate how much you should be saving for college.