Dallas-based hospital chain Tenet Healthcare Corp. swung to a fourth-quarter profit as revenue rose. The company forecast higher revenue next year but said increased expenses will slow profit growth. Tenet posted a net quarterly profit of $21 million, or 4 cents a share, compared with a net loss of $33 million, or 7 cents a share, a year earlier. That beat profit expectations of 1 cent a share, based on 20 analysts polled by Thomson Reuters.