NEW YORK (CNNfn) - Shares of Caldera Systems, which enables the development and management of Linux servers, jumped 118 percent following the company's $70 million initial public offering.
Shares of Datalink.net, an Internet service provider, climbed more than 25 percent after CIBC World Markets started coverage on the company with a buy rating.
Today's winners
Caldera Systems Inc. (CALD: Research, Estimates) up 16-1/2 to 30-1/2.
Caldera Systems shares benefited from investor demand for Linux software providers and shrugged off a sagging Nasdaq to post solid gains after the company's $70 million initial public offering. Caldera Systems enables the development and management of Linux specialized servers and Internet access devices that simplify computing.
ClickAction Inc. (CLAC: Research, Estimates) up 9-1/2 to 44-5/8.
Banc of America analyst Greg Vogel said he had started coverage of
ClickAction with a buy rating and an $87 share price target. ClickAction provides services and software for "opt-in" e-mail distribution over the Internet; meaning consumers can voluntarily disclose personal data to receive advertisements and promotions.
Identix Inc. (IDX: Research, Estimates) up 4 to 30.
Lehman Bros. said it raised its rating on Identix to a buy from outperform and increased its price target to $36 a share from $18. Identix develops technology to record fingerprints for security, law enforcement and other applications.
Travelers Property-Casualty Corp. (TAP: Research, Estimates) up 7-1/4 to 40-15/16.
Citigroup said it would offer to buy the 15 percent of Travelers Property-Casualty that it does not already own for $2.4 billion, or $41.50 a share, which represents a 23 percent premium on the insurance company's closing stock price of 33.68 on Monday.
Datalink.net Inc. (DLK: Research, Estimates) up 15-3/4 to 77-1/2.
CIBC World Markets said it started coverage on shares of Datalink.net with a buy rating and a $125 price target, a market source said. Datalink.net develops and markets "Web to Wireless" information products.
Aclara Biosciences (ACLA: Research, Estimates) up 9-5/8 to 30-5/8.
Aclara Biosciences shares traded Tuesday, its first day of trading on Nasdaq, at 31-3/16, up 10-3/16, well above the expected price range of $20 to $21 for the 9 million shares sold in the company's initial public offering Tuesday. The company develops products based on its microfluidics technology, which allow researchers to perform chemical and biological measurements in a miniaturized format.
Today's losers
Microstrategy Inc. (MSTR: Research, Estimates) down 13-1/2 to 73-1/4.
Microstrategy, a provider of e-business software and services which saw its shares plunge Monday, continued to fall on news that the company's new method for booking sales may hurt two years of the company's financial results as well as its first-quarter financials.
Protein Design Labs Inc. (PDLI: Research, Estimates) down 53-3/8 to 80-3/4.
Drug developer Protein Design Labs' stock fell on Monday and continued to decline on Tuesday after the company said that certain claims on its European patent on humanized monoclonal antibodies had been revoked by the European Patent Office.
Medarex Inc. (MEDX: Research, Estimates) down 14-13/16 to 52.
Shares of biotechnology giant Medarex fell 18 percent, continuing the decline for many biotechnology stocks.
Abgenix Inc. (ABGX: Research, Estimates) down 20-1/4 to 179-1/4.
Shares of biotech company Abgenix have also dipped 13 percent. Analysts say Abgenix is a biotech that has suffered along with many biotech stocks. 
--Compiled by Lucy Banduci from wire reports
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