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.

Of these, value investing is easily one of the most popular ways to find great stocks in any market environment. Value investors use a variety of methods, including tried-and-true valuation metrics, to find these stocks.

Luckily, Zacks has developed its own Style Scores system in an effort to find stocks with specific traits. Value investors will be interested in the system's "Value" category. Stocks with both "A" grades in the Value category and high Zacks Ranks are among the strongest value stocks on the market right now.

One stock to keep an eye on is Equitable Holdings (EQH Quick QuoteEQH - Free Report) . EQH is currently sporting a Zacks Rank of #2 (Buy) and an A for Value. The stock is trading with a P/E ratio of 5.26, which compares to its industry's average of 12.59. Over the past 52 weeks, EQH's Forward P/E has been as high as 7.31 and as low as 3.93, with a median of 4.75.

Value investors also use the P/S ratio. The P/S ratio is is calculated as price divided by sales. This is a prefered metric because revenue can't really be manipulated, so sales are often a truer performance indicator. EQH has a P/S ratio of 1.05. This compares to its industry's average P/S of 1.76.

These figures are just a handful of the metrics value investors tend to look at, but they help show that Equitable Holdings is likely being undervalued right now. Considering this, as well as the strength of its earnings outlook, EQH feels like a great value stock at the moment.