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 Contents Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. A Decision Not Made Is Still a Decision Investors who put off important investment decisions may face potential consequence to their future financial security. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.