Some stocks are one-hit wonders, making a big splash when they first appear, then quickly fizzling into oblivion. But for other stocks, that initial big move is only a preview of bigger and better gains.

Today, we've compiled a list of stocks that made some of the biggest moves up over the past 30 days. We'll then pair that list with the ratings issued by our Motley Fool CAPS community. The higher each stock's rating, the greater CAPS members' faith in that company's ability to keep on beating the market.

Stock

30-Day % Change

CAPS Rating

Jazz Pharmaceuticals (NASDAQ:JAZZ)

278.00%

*

Monogram Biosciences

132.99%

**

Savient Pharmaceuticals

89.40%

**

Oshkosh (NYSE:OSK)

49.71%

****

Merge Healthcare

42.00%

**

Orexigen Therapeutics

37.63%

*

Labopharm (NASDAQ:DDSS)

36.52%

**

Poniard Pharmaceuticals (NASDAQ:PARD)

36.48%

**

Ivanhoe Mines

34.33%

**

Alvarion (NASDAQ:ALVR)

30.82%

****

As the market goes into its second week of dropping, the magnitude of gains is less than what we saw in previous weeks. With almost all of the stocks carrying low one- and two-star ratings, let's see why the CAPS community thinks the higher-ranking companies might outperform the market.

A new winner
Well, that had to hurt. MRAP manufacturers Navistar International (NYSE:NAV), Force Protection (NASDAQ:FRPT), and BAE Systems have to feel a bit slighted by the Pentagon's decision to assign a $1.1 billion contract to truck maker Oshkosh.

Earlier this year, Navistar protested the Defense Department's decision to move to a lighter vehicle than the one it manufactures now, but when it withdrew its protest, some thought it was back in the lead to win the contract to build the mine-resistant, ambush-protected trucks.

Oshkosh says the contract calls for 2,200 trucks, but that it's likely to receive a second order, valued at $1.8 billion for 3,000 more vehicles, by the end of July. CAPS All-Star member swingtrader930 says this influx of revenue will bolster an already solid company.

The government is giving them a contract worth $1Billion. That's as much as their market cap. All vehicle manufacturers have been suffering. They were a fairly stable company before the contract and they weren't burning cash. This infusion of revenue should help this issue. The news is out and old at this point. Waiting for a small pull back would be [advisable].

Alvarion didn't win any government contracts as large as that, but the wireless broadband equipment maker might help Nokia Siemens Network deploy next-generation WiMAX technologies. The joint venture is expected to invest heavily in 4G wireless networks, and Alvarion is a contender.

It could use the contract, but some investors aren't sold on it. CAPS member sunbakd1 looks at the wider losses the company reported and suggests Alvarion needs to do a lot more to be considered a growth story.

Has anyone looked at their income statement? Hello, negative income, negative cash flow. How is this a solid company to buy on growth when they dont make money? Down 600% in revenue growth. I would not follow the herd on this stock. It could lead you directly to the slaughter house.

Alvarion, though, has outperformed the composite of companies with the CAPS Communications Equipment tag, which has advanced only about 5% over the past 30 days.

Shake, rattle, and roll
It pays to start your own research on these stocks at Motley Fool CAPS. Read a company's financial reports, scrutinize key data and charts, and examine the comments your fellow investors have made -- all from a stock's CAPS page.

Alvarion is a Motley Fool Rule Breakers recommendation.

Fool contributor Rich Duprey does not have a financial position in any of the stocks mentioned in this article. You can see his holdings. You can shake, rattle, and roll The Motley Fool's disclosure policy, but it still won't break.