What's better than momentum? Mo' momentum.

Let's take a closer look at five of this past week's biggest scorchers.

Company

May 6

Weekly Gain

My Watchlist

Kendle (Nasdaq: KNDL)

$15.00

50%

Add

BioScrip (Nasdaq: BIOS)

$6.51

41%

Add

International Coal (NYSE: ICO)

$14.45

31%

Add

Barnes & Noble (NYSE: BKS)

$14.37

31%

Add

ZST Digital Networks (Nasdaq: ZSTN)

$3.78

29%

Add

Source: Barron's.

Kendle was the market's top-performing company, taking off after agreeing to be acquired by privately held INC Research in a $232 million deal. INC is buying the provider of clinical research for the biotech industry for $15.25 a share.

Analysts figured that BioScrip would post a small loss in its first quarter. The pharmacy benefits manager came through with a profitable showing. The 31% top-line spike was largely the result of a home health services acquisition last year, but the better than expected bottom-line results can't be discounted.

Arch Coal (NYSE: ACI) is buying International Coal in a $3.4 billion deal. The acquisition will make Arch the country's second-largest met coal miner.

Barnes & Noble scribbled a new chapter in its rocky tell-all. The meandering and profit-hungry superstore chain revealed in an SEC filing that it will be introducing a new e-reader on May 24. Whether it's an upgrade to its Nook Color or an entirely new device, Mr. Market loves a good page turner.

China's ZST responded to recent concerns that were raised about office space purchases and discrepancies between its SEC filings and its filings with the Chinese State Administration of Industry and Commerce. The supplier of digital and optical network equipment and installation services to Chinese cable system operators also posted blowout quarterly results, with revenue nearly doubling and earnings soaring 166%.

It was a great week for these five stocks. Now let's see if they're up for an encore.

Which of these five stocks do you think will continue to move higher? Share your thoughts in the comment box below.

The Fool owns shares of Kendle International. 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.

Longtime Fool contributor Rick Munarriz enjoys cheering on winners and whispering words of encouragement to the losers. He does not own shares in any of the companies in this story. He is also part of the Rule Breakers newsletter research team, seeking out tomorrow's ultimate growth stocks a day early. The Fool has a disclosure policy.