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

Today, we've listed three stocks that made some of the biggest moves over the past month, which we'll pair with the ratings issued by our Motley Fool CAPS community. The higher each stock's rating (out of five), the greater CAPS members' faith in that company's ability to keep on beating the market.

Stock

1 Month  % Change

CAPS Rating

Coinstar (Nasdaq: CSTR)

51.3%

***

Sybase (NYSE: SY)

37.9%

**

VIVUS (Nasdaq: VVUS)

26.4%

***

Source: Motley Fool CAPS.

As the markets whipsaw to changes in consumer sentiment, there will be weeks like this one when it's hard to believe any company finished with positive numbers. So before we get shaken out again, let's see why the CAPS community thinks some of these companies might continue to outperform the market.

A mighty temblor
After a quarterly report that knocked the cover off the ball, movie rental provider Coinstar also undoubtedly benefited from the news that one-time rival Movie Gallery was giving up the ghost and shutting down operations. It's likely Blockbuster (NYSE: BBI) will be the biggest beneficiary of having one fewer bricks-and-mortar competitor, and Netflix (Nasdaq: NFLX) surely will pick up a customer or two, but Coinstar is going to get more than its fair share of videophiles as a result.

Although Blockbuster is putting more kiosks out on street corners, it has nowhere near the reach that Redbox does right now. Blockbuster is also closing many of its storefront operations as it tries to rebound. So while it gets some residual Movie Gallery customers, with fewer and fewer stores open, DVD renters will turn to kiosks for their immediate fix -- and the name most associated with that is Coinstar.

CAPS member Survivn2 writes that Coinstar is overpriced and lacks a range of titles, but TrojanFan says it has a number of opportunities to increase its value to consumers.

Furthermore, now that they are driving some serious traffic and have commited to some ambitious expansion plans in 2010, they are pursuing some interesting cross-selling partnerships with Amazon for MP3 digital downloads with change cashed in at their Coinstar machines.

Does it compute?
Shares of Sybase, a database and mobile applications software vendor, didn't jump as a result of a competitor going out of business. Maybe that's because it's being acquired. Enterprise software giant SAP agreed to spend $5.8 billion on Sybase so it could compete more effectively against Oracle (Nasdaq: ORCL), but some analysts think it overpaid.

This leads to speculation about whether we'll see Oracle make a higher bid. Perhaps the SAP premium was an attempt to ensure that no one else made an offer and stole the company out from under it.

Before the bid was made, more than 82% of the CAPS members rating Sybase believed it would outperform the market, but no one has offered an opinion yet on whether this deal will go through or there will be a counteroffer. Head over to the Sybase CAPS page and let us know what you think.

Still feeling the aftershocks
Biotech VIVUS got a boost at the end of last month when an analyst said its weight-loss drug Qnexa has a lot of potential and he expected the Food and Drug Administration to approve it. Last September, VIVUS released results from two phase 3 studies showing that Qnexa was an effective therapy, and a report just came out showing that it also lowered blood pressure, too.

An FDA advisory panel is expected to review Qnexa in July, and while the agency doesn't have to follow the panel's recommendations (and it seems to be going off on its own a lot lately), there's a consensus building that VIVUS will make it through the gantlet.

Highly rated CAPS All-Star livinwright13 writes that VIVUS will be living large in the fall and likens Qnexa to surgery in a pill.

60% of our neighbors are too fat to freestyle. Gastric bypass in the form of a pill and it looks like October could be the 'Go' date.

Shake, rattle, and roll
It pays to start your own research on these recent winners, or any other 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.

Netflix and Amazon are Motley Fool Stock Advisor choices. The Fool owns shares of and has written puts on Oracle.

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.