Every investor can appreciate a stock that consistently beats the Street without getting ahead of its fundamentals and risking a meltdown. The best stocks offer sustainable market-beating gains, with improving financial metrics that support strong price growth. Let's take a look at what Deckers Outdoor's (DECK -5.51%) recent results tell us about its potential for future gains.

What the numbers tell you
The graphs you're about to see tell Deckers' story, and we'll be grading the quality of that story in several ways.

Growth is important on both top and bottom lines, and an improving profit margin is a great sign that a company's become more efficient over time. Since profits may not always be reported at a steady rate, we'll also look at how much Deckers' free cash flow has grown in comparison to its net income.

A company that generates more earnings per share over time, regardless of the number of shares outstanding, is heading in the right direction. If Deckers' share price has kept pace with its earnings growth, that's another good sign that its stock can move higher.

Is Deckers managing its resources well? A company's return on equity should be improving, and its debt to equity ratio declining, if it's to earn our approval.

By the numbers
Now, let's take a look at Deckers' key statistics:

DECK Total Return Price Chart

DECK Total Return Price data by YCharts

Passing Criteria

3-Year* Change 

Grade

Revenue growth > 30%

82.3%

Pass

Improving profit margin

(22.7%)

Fail

Free cash flow growth > Net income growth

(108.5%) vs. 74.1%

Fail

Improving EPS

78.1%

Pass

Stock growth (+ 15%) < EPS growth

39.4% vs. 78.1%

Pass

Source: YCharts. * Period begins at end of Q3 2009.

DECK Return on Equity Chart

DECK Return on Equity data by YCharts

Passing Criteria

3-Year* Change

Grade

Improving return on equity

(10.4%)

Fail

Declining debt to equity

544.4%

Fail

Source: YCharts. * Period begins at end of Q3 2009.

How we got here and where we're going
While Deckers does have some momentum going on the bottom line, it's not enough to overcome declining margins and free cash flow. Deckers has had some well-known problems with material costs, so if those can be handled and surpassed, there's no reason why the company shouldn't earn more than a mere three out of seven passing grades next time we examine it.

Deckers' stock has been weaker over the past year than this chart indicates, as it's hit multiple 52-week lows before bottoming out in October. Since then, it's marginally higher, but still far below where it once was. The problem stems from Deckers' flagship Ugg boots, which make up, by far, the largest slice of the company's revenue, and which have had their margins undermined by rising input costs. This is worse than the problem plaguing fellow shoemaker Crocs (CROX -2.45%), which produces its own proprietary material -- but both companies suffer the same vagaries of a fickle consumer market. Both companies' third-quarter earnings reports were lousy, which points to slackening demand.

Will that continue? More recent signs point to an uptick in interest, as Deckers had a good December, thanks to reports that its Ugg boots were a hot holiday item. Shortly before that report, a Sterne Agee analyst gave Deckers a major price target upgrade, and it's certainly plausible -- with a single-digit P/E, Deckers is about as cheap as it's ever been  in our entire three-year tracking period. That's less than half what Nike (NKE -1.43%) and Wolverine Worldwide (WWW -2.40%) shares trade for today, which indicates both a great amount of potential in Deckers, and a greater sense of investor faith in more diversified shoe brands. Neither of them had the top-selling shoe on a certain online retailer this Christmas, but if you've got 50 different varieties to choose from, the sales of one particular model become a little less important.

Deckers appears to be on the right track, but it's got to maintain momentum in a challenging retail environment. The Consumer Confidence Index fell big time in January, which might crimp the company's growth in the first quarter. We'll soon find out how Deckers performed over the holidays, and that report could be a big step toward improving the company's weak score in our analysis today.

Putting the pieces together
Today, Deckers has some of the qualities that make up a great stock, but no stock is truly perfect. Digging deeper can help you uncover the answers you need to make a great buy -- or to stay away from a stock that's going nowhere.