Since July 22, the market is down a little over 10%. That's over a percent a day. When there's market volatility like this, I go trolling for bargains -- babies being thrown out with the bathwater.

While I was trolling, though, I noticed a little fun fact I want to share. There are 3,531 stocks trading on major U.S. exchanges with market caps above $200 million. Of those, 1,992, or 56%, of them have fallen more than 10% in this market slump.

Guess how many have gone up more than 10%? If you paid attention to the headline, you know that it's 15 (trailers ruin everything these days).

Here they are (from biggest to lowest gain):

Company

Market Cap (in millions)

P/E Ratio

Price Change from July 22

Emdeon (NYSE: EM) $1,672 67.2 37.7%                          
S1 (Nasdaq: SONE) $501 NM 31.8%                        
Stamps.com (Nasdaq: STMP) $244 23.7 28.2%                        
Multi-Color (Nasdaq: LABL) $355 15.9 18.7%                         
Sagent Pharmaceuticals (Nasdaq: SGNT) $769 NM 17.1%                        
Global Traffic Network (Nasdaq: GNET) $266 49.7 15.1%                         
Hudson Valley Holding (NYSE: HVB) $378 17.0 14.7%                         
Sturm, Ruger & Co. (NYSE: RGR) $514 17.4 14.4%                         
Rubicon Minerals (AMEX: RBY) $889 NM 14.3%                        
Xueda Education Group (NYSE: XUE) $599 39.3 14%                         
Telmex (NYSE: TMX) $15,939 13.4 12.7%                         
Konami (NYSE: KNM) $4,031 22.6 11.8%                        
Green Mountain Coffee Roasters (Nasdaq: GMCR) $15,730 107.3 10.8%                        
Mitel Networks (Nasdaq: MITL) $250 3.1 10.8%                        
Lexmark International (NYSE: LXK) $2,600 8.0 10.3%                         

Source: Capital IQ, a division of Standard & Poor's.

Why did these stocks buck the trend? Much of it was buying activity.

Looking at a few, the top gainer, Emdeon, is being taken private by Blackstone. Telmex is moving up as AmericaMovil is in the process of buying out the 40% it doesn't already own. S1 has been a reluctant buyout target. Agnico-Eagle Mines took a 9.2% stake in Rubicon.

But for some, it was about outperforming expectations.

Stamps.com smashed earnings estimates by almost 2:1. Multi-Color and Lexmark beat estimates as well. As did Green Mountain Coffee Roasters.

Any lessons as we peruse the list?

It's hard to predict mergers and acquisition activity. Instead, the stocks that have outperformed remind us to look for companies whose operations are likely to best expectations. As for these particular 15 stocks that have performed well recently, it's a higher hurdle for success than it used to be. Watch out for buying high and selling low, but also be on the lookout for any signs that these companies can continue their winning ways.

In any case, we're only talking nine market sessions here.

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Editor’s note: A previous version of this article erroneously tickered Rubicon Minerals with Rubicon Technology’s ticker. The Fool regrets the error.

Anand Chokkavelu doesn't own shares of any company mentioned. He wishes he did on July 22, though. Motley Fool newsletter services have recommended buying shares of and creating a lurking gator position in Green Mountain Coffee Roasters. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.