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.

Looking at the history of these trends, perhaps none is more beloved than value investing. This strategy simply looks to identify companies that are being undervalued by the broader market. Value investors rely on traditional forms of analysis on key valuation metrics to find stocks that they believe are undervalued, leaving room for profits.

Zacks has developed the innovative Style Scores system to highlight stocks with specific traits. For example, value investors will be interested in stocks with great grades in the "Value" category. When paired with a high Zacks Rank, "A" grades in the Value category are among the strongest value stocks on the market today.

One company value investors might notice is ENGIE - Sponsored ADR (ENGIY Quick QuoteENGIY - Free Report) . ENGIY is currently holding a Zacks Rank #2 (Buy) and a Value grade of A. The stock holds a P/E ratio of 9.66, while its industry has an average P/E of 15.28. Over the past year, ENGIY's Forward P/E has been as high as 11.37 and as low as 6.67, with a median of 9.61.

Another notable valuation metric for ENGIY is its P/B ratio of 1.14. The P/B ratio pits a stock's market value against its book value, which is defined as total assets minus total liabilities. ENGIY's current P/B looks attractive when compared to its industry's average P/B of 2.63. Over the past 12 months, ENGIY's P/B has been as high as 1.28 and as low as 0.86, with a median of 1.05.

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