Walgreen (WAG) and CVS Caremark (CVS) Shares Pop on Pharmacy Contract Extension

Walgreen (NYSE: WAG) and CVS Caremark (NYSE: CVS) shares jump up pre-market on news that the companies have extended their contract, where Walgreen's will continue to participate in CVS Caremark's pharmacy benefit management (PBM) national retail network for existing, new or renewal plans.

Shares of Walgreen are up about 5.74% and CVS is up 5.12% so far today.

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