Cigna's stock rises 19% despite quarterly loss

Cigna Corp. said rising unemployment levels should continue to whittle away at enrollment in 2009, as the managed-care provider posted a fourth-quarter loss due in part to investment losses. Managed-care providers have been battling pricing difficulties, rising costs, investment losses, and tight commercial-risk enrollment, a problem exacerbated by rising unemployment. In response, some insurers have trimmed their work forces.