Bursting the Bubble Tulips were the first, but they won’t be the last. What forms a “bubble” and what causes them to burst? Related Content What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month. Split Annuity Strategy Here's one strategy that combines two different annuities to generate income and rebuild principal. Bi-Weekly Payments This calculator estimates the savings from paying a mortgage bi-weekly instead of monthly.