Walmart and Humana mull joint effort in light of market pressures
A closer collaboration or merger would make sense and help the companies keep pace with rivals.

A shopping cart sits in the parking lot of a Wal-Mart store in Alexandria, Virginia, U.S., on Wednesday, Nov. 14, 2012. Wal-Mart Stores Inc. is scheduled to release earnings data on Nov. 15. Photographer: Andrew Harrer/Bloomberg
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