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 company to watch right now is Siderurgica Nacional (SID). SID is currently sporting a Zacks Rank of #1 (Strong Buy), as well as a Value grade of A. The stock has a Forward P/E ratio of 3.49. This compares to its industry's average Forward P/E of 5.14. Over the past 52 weeks, SID's Forward P/E has been as high as 12.04 and as low as 3.03, with a median of 7.89.

We also note that SID holds a PEG ratio of 0.16. This metric is used similarly to the famous P/E ratio, but the PEG ratio also takes into account the stock's expected earnings growth rate. SID's industry has an average PEG of 0.35 right now. Over the past 52 weeks, SID's PEG has been as high as 0.48 and as low as 0.13, with a median of 0.17.

Finally, investors will want to recognize that SID has a P/CF ratio of 4.86. 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 11.49. Over the past 52 weeks, SID's P/CF has been as high as 156.17 and as low as 3.48, with a median of 7.27.

Value investors will likely look at more than just these metrics, but the above data helps show that Siderurgica Nacional is likely undervalued currently. And when considering the strength of its earnings outlook, SID sticks out at as one of the market's strongest value stocks.

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