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.

One company value investors might notice is Hannover Ruck (HVRRY Quick QuoteHVRRY - Free Report) . HVRRY is currently holding a Zacks Rank #2 (Buy) and a Value grade of A. The stock is trading with P/E ratio of 11 right now. For comparison, its industry sports an average P/E of 18.83. Over the past 52 weeks, HVRRY's Forward P/E has been as high as 14.05 and as low as 11.00, with a median of 12.34.

Another notable valuation metric for HVRRY is its P/B ratio of 2.42. Investors use the P/B ratio to look at a stock's market value versus its book value, which is defined as total assets minus total liabilities. This company's current P/B looks solid when compared to its industry's average P/B of 4.50. Within the past 52 weeks, HVRRY's P/B has been as high as 2.92 and as low as 2.19, with a median of 2.52.

Value investors also use the P/S ratio. The P/S ratio is calculated as price divided by sales. This is a preferred metric because revenue can't really be manipulated, so sales are often a truer performance indicator. HVRRY has a P/S ratio of 1.23. This compares to its industry's average P/S of 3.5.

Finally, investors will want to recognize that HVRRY has a P/CF ratio of 12.86. This metric focuses on a firm's operating cash flow and is often used to find stocks that are undervalued based on the strength of their cash outlook. This company's current P/CF looks solid when compared to its industry's average P/CF of 19.17. Over the past year, HVRRY's P/CF has been as high as 16.47 and as low as 11.94, with a median of 13.54.

These are only a few of the key metrics included in Hannover Ruck'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, HVRRY looks like an impressive value stock at the moment.