Shares of Genesis Microchip ( GNSS) were among technology's losers Tuesday, sliding 17% after the chip designer posted a wider-than-expected loss in its fiscal third quarter and gave a revenue forecast that was well below expectations.

For the quarter ended Dec. 31, the company reported a loss of $130.4 million, or $3.57 a share, on revenue of $51.1 million. Excluding charges, Genesis posted a loss of $7.7 million, or 21 cents a share. Analysts polled by Thomson First Call expected a loss of 3 cents a share and revenue of $54.6 million. During the year-ago period, the company earned $7.4 million, or 20 cents a share, on revenue of $74 million.

Genesis forecast fourth-quarter revenue of $35 million to $40 million, well short of analysts' target of $51.1 million. "Our exposure to the TV market in Europe, coupled with the loss of market share by a few of our key customers, led to disappointing results in the third quarter and reduced expectations for the fourth quarter," the company said. Shares were trading down $1.68 to $8.18.

CNet Networks ( CNET) rose 9% after the online media company posted better-than-expected fourth-quarter revenue. The company earned $6.3 million, or 4 cents a share, on revenue of $118.4 million. Analysts expected revenue of $111.8 million. During the year-earlier period, the company earned $20.7 million, or 13 cents a share, on revenue of $103.7 million.

For the first quarter, CNet expects a loss of between 3 cents and 6 cents a share, with revenue of $90 million to $94 million. Analysts project a loss of 3 cents a share and revenue of $91.8 million. Shares were trading up 75 cents to $9.15.

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