How much can you safely spend in retirement without running out of money?It’s one of the biggest questions retirees face. For years, many people have looked to the well-known “4% rule” for guidance. But as helpful as that rule may be, it’s not as simple—or as reliable—as many assume.Today, Mark Biller, Executive Editor and Senior Portfolio Manager at Sound Mind Investing, joined us to revisit this widely used guideline and explain why a more flexible, personalized approach may better serve retirees.