It was hard to argue with Wal-Mart (NYSE: WMT)'s ruthless efficiency and emphasis on cost-cutting at all costs when it was producing results.
But as the five-year chart below shows, Wal-Mart's stock has been a serious laggard of late. Meanwhile, its more socially conscious discounting cousin, Costco (NYSE: COST) has been on a tear.

Over the past five years, shares of Wal-Mart have lost more than 10% of their value. Costco is up better than 100% over the same period.
But as the five-year chart below shows, Wal-Mart's stock has been a serious laggard of late. Meanwhile, its more socially conscious discounting cousin, Costco (NYSE: COST) has been on a tear.

Over the past five years, shares of Wal-Mart have lost more than 10% of their value. Costco is up better than 100% over the same period.
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