Value-based models a driver of CVS-Aetna deal

The healthcare system's transition toward more value-based payment systems was a driver of the proposed $69 billion acquisition of Aetna Inc. (NYSE:AET) by CVS Health Corp (NYSE:CVS).

On Sunday, CVS proposed to acquire Aetna for $145 per share in cash and 0.8378 CVS shares for each Aetna share. CVS gains Aetna's medical benefits business, which includes over 22 million members. CVS's Caremark PBM business manages pharmaceutical benefits for almost 90 million members, and has served as Aetna's PBM...