Have you been paying attention to shares of Atlas Air Worldwide Holdings (AAWW)? Shares have been on the move with the stock up 15.9% over the past month. The stock hit a new 52-week high of $95 in the previous session. Atlas Air Worldwide Holdings has gained 74% since the start of the year compared to the 11.4% move for the Zacks Transportation sector and the 11.5% return for the Zacks Transportation - Air Freight and Cargo industry.What's Driving the Outperformance?The stock has an impressive record of positive earnings surprises, as it hasn't missed our earnings consensus estimate in any of the last four quarters. In its last earnings report on November 3, 2021, Atlas Air reported EPS of $4.88 versus consensus estimate of $4.12 while it beat the consensus revenue estimate by 1.65%.For the current fiscal year, Atlas Air is expected to post earnings of $17.39 per share on $3.96 billion in revenues. This represents a 27.21% change in EPS on a 23.18% change in revenues. For the next fiscal year, the company is expected to earn $11.89 per share on $3.89 billion in revenues. This represents a year-over-year change of -31.66% and -1.57%, respectively.Valuation MetricsAtlas Air may be at a 52-week high right now, but what might the future hold for the stock? A key aspect of this question is taking a look at valuation metrics in order to determine if the company is due for a pullback from this level.On this front, we can look at the Zacks Style Scores, as these give investors a variety of ways to comb through stocks (beyond looking at the Zacks Rank of a security). These styles are represented by grades running from A to F in the categories of Value, Growth, and Momentum, while there is a combined VGM Score as well. The idea behind the style scores is to help investors pick the most appropriate Zacks Rank stocks based on their individual investment style.Atlas Air has a Value Score of A. The stock's Growth and Momentum Scores are B and D, respectively, giving the company a VGM Score of A.In terms of its value breakdown, the stock currently trades at 5.5X current fiscal year EPS estimates. On a trailing cash flow basis, the stock currently trades at 3.7X versus its peer group's average of 5.7X. This isn't enough to put the company in the top echelon of all stocks we cover from a value perspective.Zacks RankWe also need to look at the Zacks Rank for the stock, as this supersedes any trend on the style score front. Fortunately, Atlas Air currently has a Zacks Rank of #2 (Buy) thanks to rising earnings estimates.Since we recommend that investors select stocks carrying Zacks Rank of 1 (Strong Buy) or 2 (Buy) and Style Scores of A or B, it looks as if Atlas Air passes the test. Thus, it seems as though Atlas Air shares could still be poised for more gains ahead. Zacks’ Top Picks to Cash in on Artificial Intelligence This world-changing technology is projected to generate $100S of billions by 2025. From self-driving cars to consumer data analysis, people are relying on machines more than we ever have before. Now is the time to capitalize on the 4th Industrial Revolution. Zacks’ urgent special report reveals 6 AI picks investors need to know about today.See 6 Artificial Intelligence Stocks With Extreme Upside Potential>>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 Atlas Air Worldwide Holdings (AAWW): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research