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. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences.