The proven Zacks Rank system focuses on earnings estimates and estimate revisions to find winning stocks. Nevertheless, we know that our readers all have their own perspectives, so we are always looking at the latest trends in value, growth, and momentum to find strong picks.

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 rely on traditional forms of analysis on key valuation metrics to find stocks that they believe are undervalued, leaving room for profits.

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 stock to keep an eye on is Matrix Service (MTRX Quick QuoteMTRX - Free Report) . MTRX is currently holding a Zacks Rank of #1 (Strong Buy) and a Value grade of A. The stock holds a P/E ratio of 11.78, while its industry has an average P/E of 29.78. Over the past year, MTRX's Forward P/E has been as high as 20.98 and as low as 10.28, with a median of 14.39.

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 popular metric because sales are harder to manipulate on an income statement, so they are often considered a better performance indicator. MTRX has a P/S ratio of 0.35. This compares to its industry's average P/S of 0.64.

These are only a few of the key metrics included in Matrix Service'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, MTRX looks like an impressive value stock at the moment.