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 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.

USANA Health Sciences (USNA Quick QuoteUSNA - Free Report) is a stock many investors are watching right now. USNA is currently sporting a Zacks Rank #2 (Buy), as well as a Value grade of A.

We also note that USNA holds a PEG ratio of 0.78. This popular metric is similar to the widely-known P/E ratio, with the difference being that the PEG ratio also takes into account the company's expected earnings growth rate. USNA's industry has an average PEG of 1.83 right now. USNA's PEG has been as high as 1.42 and as low as 0.65, with a median of 0.92, all within the past year.

We should also highlight that USNA has a P/B ratio of 1.01. The P/B ratio pits a stock's market value against 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 1.62. Over the past year, USNA's P/B has been as high as 1.66 and as low as 0.83, with a median of 1.20.

Finally, our model also underscores that USNA has a P/CF ratio of 8.70. 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. USNA's current P/CF looks attractive when compared to its industry's average P/CF of 12.69. Over the past 52 weeks, USNA's P/CF has been as high as 11.26 and as low as 7.18, with a median of 9.42.

These are only a few of the key metrics included in USANA Health Sciences'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, USNA looks like an impressive value stock at the moment.