Here at Zacks, our focus is on the proven Zacks Rank system, which emphasizes earnings estimates and estimate revisions to find great stocks. Nevertheless, we are always paying attention to the latest value, growth, and momentum trends to underscore strong picks.

Of these, value investing is easily one of the most popular ways to find great stocks in any market environment. Value investors use tried-and-true metrics and fundamental analysis to find companies that they believe are undervalued at their current share price levels.

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 company to watch right now is Southwestern Energy (SWN Quick QuoteSWN - Free Report) . SWN is currently sporting a Zacks Rank of #2 (Buy), as well as an A grade for Value. The stock holds a P/E ratio of 3.35, while its industry has an average P/E of 7.67. SWN's Forward P/E has been as high as 8.10 and as low as 3.35, with a median of 5.14, all within the past year.

Value investors also use the P/S ratio. The P/S ratio is is calculated as price divided by sales. This is a popular metric because sales are harder to manipulate on an income statement, so they are often considered a better performance indicator. SWN has a P/S ratio of 0.84. This compares to its industry's average P/S of 2.1.

These are only a few of the key metrics included in Southwestern Energy's strong Value grade, but they help show that the stock is likely undervalued right now. When factoring in the strength of its earnings outlook, SWN looks like an impressive value stock at the moment.