Here at Zacks, we focus on our proven ranking system, which places an emphasis on earnings estimates and estimate revisions, to find winning stocks. But we also understand that investors develop their own strategies, so we are constantly looking at the latest trends in value, growth, and momentum to find strong companies for our readers.

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 use tried-and-true metrics and fundamental analysis to find companies that they believe are undervalued at their current share price levels.

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.

Allison Transmission Holdings (ALSN Quick QuoteALSN - Free Report) is a stock many investors are watching right now. ALSN is currently sporting a Zacks Rank #2 (Buy), as well as a Value grade of A. The stock has a Forward P/E ratio of 10.31. This compares to its industry's average Forward P/E of 17.58. Over the past year, ALSN's Forward P/E has been as high as 13.43 and as low as 9.25, with a median of 11.03.

These are just a handful of the figures considered in Allison Transmission Holdings's great Value grade. Still, they help show that the stock is likely being undervalued at the moment. Add this to the strength of its earnings outlook, and we can clearly see that ALSN is an impressive value stock right now.