Shares of Crocs soared around 72 percent in 2007, as fans in the U.S. and abroad purchased the company's colorful shoes made of a proprietary closed-cell resin material.

But the stock dropped by more than a third on Nov. 1, after Crocs reported third-quarter sales and a 2007 revenue outlook that missed Wall Street expectations. Since Crocs released these results, shares have declined nearly 51 percent.

At the time, Crocs Chief Executive Ron Snyder blamed the results on distribution problems that ended up costing the company about $30 million in lost sales.

Still, some analysts remained confident in the Crocs fad, including JPMorgan analyst Robert Samuels, who forecast robust growth for 2007 on continued demand for the shoes.

Meanwhile, shares of soft drink maker Hansen Natural Corp. rose 38 percent this year, helped by distribution deals with Anheuser-Busch Cos. Inc. and PepsiCo Inc.

Hansen Natural also raised its prices and rolled out new products, like its Java Monster non-carbonated dairy-based coffee drinks and Monster M-80 drinks, which fueled sales growth.

However, shares have declined around 35 percent from a 52-week high of $68.40, hit in October, as several analysts downgraded the stock on a sharp run-up in the share price.

Also, Hansen Natural in November reported a quarterly profit that fell 3 cents below Wall Street expectations, which some analysts attributed to sluggish sales. Following the earnings report, the stock dropped around 23 percent.

Elsewhere this year, shares of Garmin Ltd. rose nearly 78 percent in 2007, helped by a big increase in sales of automotive devices, boating and other marine devices, and aviation equipment.

However, the stock has declined around 8 percent since Oct. 31, when Garmin offered $3.3 billion for Tele Atlas NV, a digital map data provider, to try and woo the company away from Dutch rival TomTom NV. TomTom came back with a better offer on Nov. 7, and Tele Atlas said it preferred that bid.

Meanwhile, some analysts have wondered how much of a threat Nokia Corp.'s $8.1 billion, or $78-per-share, buyout of data provider Navteq Corp. will pose to Garmin's business.

Also this year, shares of Jones Soda Co. fizzled nearly 41 percent, hurt by a packaging switch that led to significant investment spending.

Jones Soda revealed plans earlier this year to start selling its soda in cans rather than glass bottles, but a delay in the launch caused lower-than-exected earnings and its stock to drop nearly 78 percent since hitting a high of $32.60 in April.

However, shares have rebounded slightly since Peter van Stolk said earlier in December he will step down as chairman and chief executive, following shareholder lawsuits that charged him with artificially inflating the company's share price and later selling the stock before the company released the poor earnings reports that led share prices to drop.

Meanwhile, shares of WellCare Health Plans Inc. have declined nearly 39 percent this year and around 67 percent from a 52-week high of $128.42 in October amid a government investigation of the company.

The FBI raided WellCare's Tampa, Fla. headquarters on Oct. 24, but WellCare said earlier this month it still hadn't been notified about the nature of the investigation.

And finally, shares of Mastercard Inc., which went public in May 2006, have risen 113 percent this year, helped by sharp increases in spending overseas and continued growth in the U.S.

But the stock has declined 8 percent from an all-time high of $227.18 hit in December, as concerns about consumer credit continue to mount.