While the proven Zacks Rank places an emphasis on earnings estimates and estimate revisions to find strong stocks, we also know that investors tend to develop their own individual strategies. With this in mind, we are always looking at value, growth, and momentum trends to discover great companies.

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

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 Vipshop (VIPS). VIPS is currently sporting a Zacks Rank of #2 (Buy), as well as an A grade for Value.

VIPS is also sporting a PEG ratio of 1.33. This metric is used similarly to the famous P/E ratio, but the PEG ratio also takes into account the stock's expected earnings growth rate. VIPS's industry currently sports an average PEG of 3.54. VIPS's PEG has been as high as 1.35 and as low as 1.14, with a median of 1.25, all within 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 popular metric because sales are harder to manipulate on an income statement, so they are often considered a better performance indicator. VIPS has a P/S ratio of 0.48. This compares to its industry's average P/S of 1.16.

Finally, investors should note that VIPS has a P/CF ratio of 5.75. 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. This stock's P/CF looks attractive against its industry's average P/CF of 18.18. Within the past 12 months, VIPS's P/CF has been as high as 7.94 and as low as 4.62, with a median of 5.63.

Value investors will likely look at more than just these metrics, but the above data helps show that Vipshop is likely undervalued currently. And when considering the strength of its earnings outlook, VIPS sticks out at as one of the market's strongest value stocks.

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