Investors looking for stocks in the Retail - Supermarkets sector might want to consider either Tesco PLC (TSCDY) or Walmart (WMT). But which of these two stocks offers value investors a better bang for their buck right now? We'll need to 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 proven Zacks Rank puts an emphasis on earnings estimates and estimate revisions, while our Style Scores work to identify stocks with specific traits.Tesco PLC and Walmart are both sporting a Zacks Rank of # 1 (Strong Buy) right now. This means that both companies have witnessed positive earnings estimate revisions, so investors should feel comfortable knowing that both of these stocks have an improving earnings outlook. But this is just one piece of the puzzle for value investors.Value investors also try to analyze a wide range of traditional figures and metrics to help determine whether a company is undervalued at its current share price levels.The Style Score Value grade factors in a variety of key fundamental metrics, including the popular P/E ratio, P/S ratio, earnings yield, cash flow per share, and a number of other key stats that are commonly used by value investors.TSCDY currently has a forward P/E ratio of 13.25, while WMT has a forward P/E of 22.05. We also note that TSCDY has a PEG ratio of 0.50. This figure is similar to the commonly-used P/E ratio, with the PEG ratio also factoring in a company's expected earnings growth rate. WMT currently has a PEG ratio of 4.01.Another notable valuation metric for TSCDY is its P/B ratio of 1.85. The P/B ratio is used to compare a stock's market value with its book value, which is defined as total assets minus total liabilities. For comparison, WMT has a P/B of 4.49.Based on these metrics and many more, TSCDY holds a Value grade of A, while WMT has a Value grade of C.Both TSCDY and WMT are impressive stocks with solid earnings outlooks, but based on these valuation figures, we feel that TSCDY is the superior value option right now. Tech IPOs With Massive Profit Potential In the past few years, many popular platforms and like Uber and Airbnb finally made their way to the public markets. But the biggest paydays came from lesser-known names. For example, electric carmaker X Peng shot up +299.4% in just 2 months. Think of it this way… If you had put $5,000 into XPEV at its IPO in September 2020, you could have cashed out with $19,970 in November. With record amounts of cash flooding into IPOs and a record-setting stock market, this year’s lineup could be even more lucrative.See Zacks Hottest Tech IPOs Now >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Tesco PLC (TSCDY): Free Stock Analysis Report Walmart Inc. (WMT): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research