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.

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 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 Sony . SNE 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 9.63, while its industry has an average P/E of 9.66. Over the past 52 weeks, SNE's Forward P/E has been as high as 15.64 and as low as 9.18, with a median of 12.67.

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. SNE has a P/S ratio of 0.75. This compares to its industry's average P/S of 0.78.

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