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.

Of these, perhaps no stock market trend is more popular than value investing, which is a strategy that has proven to be successful in all sorts of market environments. Value investors use fundamental analysis and traditional valuation metrics to find stocks that they believe are being undervalued by the market at large.

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.

Lundin Mining (LUNMF) is a stock many investors are watching right now. LUNMF is currently sporting a Zacks Rank of #2 (Buy) and an A for Value. The stock is trading with P/E ratio of 9.62 right now. For comparison, its industry sports an average P/E of 20.20. Over the past 52 weeks, LUNMF's Forward P/E has been as high as 18.82 and as low as 7.75, with a median of 12.37.

Another valuation metric that we should highlight is LUNMF's P/B ratio of 1.15. The P/B ratio is used to compare a stock's market value with its book value, which is defined as total assets minus total liabilities. This stock's P/B looks attractive against its industry's average P/B of 3.08. Over the past year, LUNMF's P/B has been as high as 1.58 and as low as 0.72, with a median of 1.04.

Value investors also love the P/S ratio, which is calculated by simply dividing a stock's price with the company's sales. This is a prefered metric because revenue can't really be manipulated, so sales are often a truer performance indicator. LUNMF has a P/S ratio of 1.75. This compares to its industry's average P/S of 2.38.

Finally, we should also recognize that LUNMF has a P/CF ratio of 8.27. This data point considers a firm's operating cash flow and is frequently used to find companies that are undervalued when considering their solid cash outlook. LUNMF's current P/CF looks attractive when compared to its industry's average P/CF of 18.13. Over the past year, LUNMF's P/CF has been as high as 12.22 and as low as 4.98, with a median of 7.08.

These are only a few of the key metrics included in Lundin Mining'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, LUNMF looks like an impressive value stock at the moment.

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