NEW YORK (TheStreet) - Wal-Mart is the world's largest retailer, competing with companies like Target, Costco, Amazon and Best Buy. The retailer sells almost every variety of merchandise, but is most dependent on grocery products. Our price estimate for Wal-Mart stands at $65.42 which is about 17% above market price. We estimate that Wal-Mart generates 62% of its stock value from its flagship U.S.