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.In addition to the Zacks Rank, investors looking for stocks with specific traits can utilize our Style Scores system. Of course, value investors will be most interested in the system's "Value" category. Stocks with "A" grades for Value and high Zacks Ranks are among the best value stocks available at any given moment.One company to watch right now is Toll Brothers (TOL). TOL is currently holding a Zacks Rank of #1 (Strong Buy) and a Value grade of A. The stock holds a P/E ratio of 7.50, while its industry has an average P/E of 7.73. Over the last 12 months, TOL's Forward P/E has been as high as 15.40 and as low as 7.50, with a median of 10.27.We also note that TOL holds a PEG ratio of 0.57. This figure is similar to the commonly-used P/E ratio, with the PEG ratio also factoring in a company's expected earnings growth rate. TOL's industry has an average PEG of 1.10 right now. Over the past 52 weeks, TOL's PEG has been as high as 5.10 and as low as 0.41, with a median of 0.71.We should also highlight that TOL has a P/B ratio of 1.38. The P/B is a method of comparing a stock's market value to its book value, which is defined as total assets minus total liabilities. This stock's P/B looks solid versus its industry's average P/B of 1.60. Over the past year, TOL's P/B has been as high as 1.68 and as low as 0.88, with a median of 1.29.These are only a few of the key metrics included in Toll Brothers'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, TOL looks like an impressive value stock at the moment. Breakout Biotech Stocks with Triple-Digit Profit Potential The biotech sector is projected to surge beyond $775 billion by 2024 as scientists develop treatments for thousands of diseases. They’re also finding ways to edit the human genome to literally erase our vulnerability to these diseases. Zacks has just released Century of Biology: 7 Biotech Stocks to Buy Right Now to help investors profit from 7 stocks poised for outperformance. Our recent biotech recommendations have produced gains of +50%, +83% and +164% in as little as 2 months. The stocks in this report could perform even better.See these 7 breakthrough stocks now>>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Toll Brothers Inc. (TOL): Free Stock Analysis Report To read this article on Zacks.com click here.