This has not been a good year for Walmart shareholders. Amid a torrid market over the last 12 months, this giant retailer's stock has flatlined, reflecting a slowdown in sales growth.

Nor was it a great year for many Walmart customers. In fact, the company cited a sluggish economy and cuts in federal food stamps for its weak sales increase of 1.6 percent in fiscal 2014. (Growth was 5 percent the previous year.) When you stop buying food, you know things are bad.