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 Retirement Income and the Traditional Portfolio Experiencing negative returns early in retirement can potentially undermine the sustainability of your assets. Volunteering in Retirement For many, retirement includes contributing their time and talents to an organization in need. Conquering Retirement Challenges for Women Looking ahead can help you conquer these unique obstacles.