Jefferies sees low probability of WellCare, Centene buyouts After running several acquisition scenarios for the Managed Care space, Jefferies says potential takeovers of WellCare (WCG) and Centene (CNC) are "hard to justify." The firm estimates acquirers will only be able to generate 1%-3% accretion from buying either company at a 20% premium to current share prices. The deal that makes the most financial sense is Aetna (AET) buying Cigna (CI), Jefferies says today in a note to investors. Also financially attractive would be a buyout of Humana (HUM) by either Anthem (ANTM) or Aetna, the firm adds. After analyzing the Managed Care space, it upgraded this morning shares of UnitedHealth (UNH) to Buy from Hold with a $141 price target. Jefferies also has Buy ratings on Aetna, Anthem, Health Net (HNT) and Molina Healthcare (MOH).