While the proven Zacks Rank places an emphasis on earnings estimates and estimate revisions to find strong stocks, we also know that investors tend to develop their own individual strategies. With this in mind, we are always looking at value, growth, and momentum trends to discover great companies.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 tried-and-true metrics and fundamental analysis to find companies that they believe are undervalued at their current share price levels.On top of the Zacks Rank, investors can also look at our innovative Style Scores system to find stocks with specific traits. For example, value investors will want to focus on the "Value" category. Stocks with high Zacks Ranks and "A" grades for Value will be some of the highest-quality value stocks on the market today.One stock to keep an eye on is Global Ship Lease (GSL). GSL is currently sporting a Zacks Rank of #1 (Strong Buy) and an A for Value. The stock holds a P/E ratio of 3.84, while its industry has an average P/E of 5.54. Over the past 52 weeks, GSL's Forward P/E has been as high as 9.76 and as low as 2.56, with a median of 5.27.Finally, investors should note that GSL has a P/CF ratio of 5.03. This metric focuses on a firm's operating cash flow and is often used to find stocks that are undervalued based on the strength of their cash outlook. This stock's P/CF looks attractive against its industry's average P/CF of 5.68. GSL's P/CF has been as high as 6.36 and as low as 0.83, with a median of 2.29, all within the past year.Value investors will likely look at more than just these metrics, but the above data helps show that Global Ship Lease is likely undervalued currently. And when considering the strength of its earnings outlook, GSL sticks out at as one of the market's strongest value stocks. 5 Stocks Set to Double Each was hand-picked by a Zacks expert as the #1 favorite stock to gain +100% or more in 2021. Each comes from a different sector and has unique qualities and catalysts that could fuel exceptional growth. Most of the stocks in this report are flying under Wall Street radar, which provides a great opportunity to get in on the ground floor. Today, See These 5 Potential Home Runs >>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 Global Ship Lease, Inc. (GSL): Free Stock Analysis Report To read this article on Zacks.com click here.