Investors with an interest in Retail - Supermarkets stocks have likely encountered both Tesco PLC (TSCDY) and Wal-Mart de Mexico SAB de CV (WMMVY) . But which of these two companies is the best option for those looking for undervalued stocks? Let's take a closer look.Everyone has their own methods for finding great value opportunities, but our model includes pairing an impressive grade in the Value category of our Style Scores system with a strong Zacks Rank. The Zacks Rank favors stocks with strong earning ...