In this video, health-care analyst David Williamson discusses the day's three biggest losers in this sector, including Express Scripts after comments made during the company's third-quarter earnings call. Was it a company-specific problem, or should competitors such as CVS Caremark be worried over what the future holds? Watch and find out Express Scripts CEO George Paz's outlook -- and catch up on the day's other big movers.

Brenton Flynn and David Williamson have no positions in the stocks mentioned above. The Motley Fool owns shares of Express Scripts and WellPoint. Motley Fool newsletter services recommend Express Scripts and WellPoint. Try any of our Foolish newsletter services free for 30 days. We Fools don't 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.