Each weekday, TheStreet.com Ratings compiles a list of the top 10 stocks in five categories -- fast-growth, all-around value, large-cap, mid-cap and small-cap -- and publishes these lists on the Ratings section of our Web site.The rankings are based on our ratings, which assess risk-adjusted returns, as well as other criteria specific to the type of stock. We update the lists at the end of the business day on the basis of information available at the close of the previous trading session. The following day, we publish an article that takes a closer look at the ratings of the stocks on one of the lists. Today we look at all-around value stocks. These stocks are in the top 50% of all stocks rated by our proprietary quantitative model, which looks at more than 62 factors. Other selection criteria for this particular category include annual revenue of at least $500 million; lower-than-average valuation, such as a price-to-sales ratio of less than 2; and leverage that is less than 49% of total capital. First on the list is insurance and financial services company MetLife ( MET), which has merited a buy rating since December 2004. With a strong market position and growing international operations, the company is poised for strong financial performance. MetLife has bolstered its market position in the core insurance and annuity business with its acquisition of TIC. It now has one of the broadest distribution networks in the sector. Growth is expected through ongoing consolidation within the industry. The risks to the buy rating include the negative impact of any changes in interest rates, equity prices and any slowdown of the economy.