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? Address Thank you! Oops! Related Contents The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. Best Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.