Here at Zacks, our focus is on the proven Zacks Rank system, which emphasizes earnings estimates and estimate revisions to find great stocks. Nevertheless, we are always paying attention to the latest value, growth, and momentum trends to underscore strong picks.Considering these trends, value investing is clearly one of the most preferred ways to find strong stocks in any type of market. Value investors use a variety of methods, including tried-and-true valuation metrics, to find these stocks.In addition to the Zacks Rank, investors looking for stocks with specific traits can utilize our Style Scores system. Of course, value investors will be most interested in the system's "Value" category. Stocks with "A" grades for Value and high Zacks Ranks are among the best value stocks available at any given moment.CNB Financial (CCNE) is a stock many investors are watching right now. CCNE is currently holding a Zacks Rank of #2 (Buy) and a Value grade of A. The stock is trading with P/E ratio of 8.65 right now. For comparison, its industry sports an average P/E of 9.81. Over the past 52 weeks, CCNE's Forward P/E has been as high as 12.52 and as low as 6.43, with a median of 8.47.Value investors also frequently use the P/S ratio. This metric is found by dividing a stock's price with the company's revenue. This is a popular metric because sales are harder to manipulate on an income statement, so they are often considered a better performance indicator. CCNE has a P/S ratio of 1.65. This compares to its industry's average P/S of 2.19.Finally, we should also recognize that CCNE has a P/CF ratio of 7.81. This figure highlights a company's operating cash flow and can be used to find firms that are undervalued when considering their impressive cash outlook. CCNE's P/CF compares to its industry's average P/CF of 11.35. Within the past 12 months, CCNE's P/CF has been as high as 11.67 and as low as 4.85, with a median of 6.47.These are only a few of the key metrics included in CNB Financial's strong Value grade, but they help show that the stock is likely undervalued right now. When factoring in the strength of its earnings outlook, CCNE looks like an impressive value stock at the moment.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 CNB Financial Corporation (CCNE): Free Stock Analysis Report To read this article on Zacks.com click here.