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 tried-and-true metrics and fundamental analysis to find companies that they believe are undervalued at their current share price levels.

Zacks has developed the innovative Style Scores system to highlight stocks with specific traits. For example, value investors will be interested in stocks with great grades in the "Value" category. When paired with a high Zacks Rank, "A" grades in the Value category are among the strongest value stocks on the market today.

One stock to keep an eye on is Hannover Ruck (HVRRY Quick QuoteHVRRY - Free Report) . HVRRY is currently sporting a Zacks Rank #2 (Buy) and an A for Value. The stock holds a P/E ratio of 11, while its industry has an average P/E of 14.86. Over the past year, HVRRY's Forward P/E has been as high as 14.05 and as low as 11.00, with a median of 12.34.

Investors should also recognize that HVRRY has a P/B ratio of 2.42. 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 3.21. HVRRY's P/B has been as high as 2.92 and as low as 2.19, with a median of 2.52, over the past year.

Value investors also frequently use the P/S ratio. This metric is found by dividing a stock's price with the company's revenue. 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 1.12. This compares to its industry's average P/S of 2.74.

Finally, we should also recognize that HVRRY has a P/CF ratio of 12.86. This figure highlights a company's operating cash flow and can be used to find firms that are undervalued when considering their impressive cash outlook. HVRRY's current P/CF looks attractive when compared to its industry's average P/CF of 18.62. HVRRY's P/CF has been as high as 16.47 and as low as 11.94, with a median of 13.54, all within the past year.

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.