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 The Pre-Retirement Checklist This checklist can give you a quick snapshot of how prepared you are. Lifetime of Earnings Estimate how much you have the potential to earn during your working years. Dreaming Up an Active Retirement When you retire, how will you treat your next chapter?