Investors interested in Retail - Supermarkets stocks are likely familiar with Kroger (KR) and Walmart (WMT) . But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look. There are plenty of strategies for discovering value stocks, but we have found that pairing a strong Zacks Rank with an impressive grade in the Value category of our Style Scores system produces the best returns. The proven Zacks Rank emphasizes companies with positive estimate rev ...