In early December, 60 Minutes aired a segment called "Hospitals: The Cost of Admission." It relentlessly went after Health Management Associates over its admissions practices, so it shouldn't be completely surprising that when the company previewed its first-quarter numbers, admissions fell. This caused a 16% plunge in HMA and sparked a hospital sector sell-off. In this video, Fool health-care analyst David Williamson discusses what this means for investors heading into earnings season.

David Williamson has no position in any stocks mentioned. Follow David on Twitter: @MotleyDavid.

The Motley Fool recommends UnitedHealth Group. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.