Tech stocks were getting trounced again on Tuesday, sinking with the rest of the market as fears among investors persist.

The Nasdaq lost 45 points, or 2.8%, to 1571 in recent trading.

Shares of

Google

(GOOG) - Get Report

slipped 3.3% to $308.13 after Goldman Sachs chopped its target price to $475 from $520 based on lower expectations for the fourth quarter.

The firm maintained its buy rating on the company, but was cautious in view of the deteriorating economy. Recent negative trends at other Internet companies like

eBay

(EBAY) - Get Report

and

Amazon

(AMZN) - Get Report

also point to potential weakness.

Shares of

Nokia

(NOK) - Get Report

tumbled 7.8% to $13.69 after the company said it still expects its joint venture with

Siemens

(SI) - Get Report

to result in the

elimination of 9,000 jobs

. Nokia noted that it has already eliminated 6,000 jobs since May 2007, after the creation of the joint venture.

Sirius XM's

(SIRI) - Get Report

shares fell 6.9% to 25 cents after the satellite radio company exceeded revenue estimates on Wall Street but posted a

drop in net subscribers

.

Sirius XM said it ended the third quarter with 18.9 million subscribers, up 17% from the same quarter a year ago. But its net subscriber additions slipped to 344,100, down from 839,750 a year earlier.

Vodaphone

(VOD) - Get Report

shares were climbing 6.9% to $17.92 in recent trading after the company reported

an increase in first-half adjusted operating profit

of 10.5% to 5.8 billion pounds ($9.05 billion).

Revenue grew 17% in the same period, but Vodaphone lowered its full-year guidance to range between 38.8 billion pounds to 39.7 billion pounds. In July, Vodafone said it expected full-year revenue near the bottom of 39.9 billion pounds to 40.7 billion pounds.

Shares of

Mentor Graphics

(MENT)

plunged 14.8% to $5.18 after the company

warned on Tuesday

that it would post a loss for the third quarter on lower-than-expected revenue.

For the quarter ended in October, the developer of software tools for the design of semiconductors said it will lose 5 cents a share, excluding charges, on revenue of $185 million. Analysts polled by Thomson Reuters were expecting earnings of 15 cents a share, excluding charges, on revenue of $215.1 million.

The company also lowered its guidance for the fourth quarter. It now expects revenue of $270 million and earnings, excluding charges, of 55 cents. Analysts were looking for revenue of $318.6 million and an adjusted profit of 93 cents a share.

Shares of

Virgin Mobile

(VM)

were up 9.4% to $1.05 after handily topping Wall Street expectations for its third-quarter profit.

The company earned $4.07 million, or 7 cents a share, in the quarter ended Sept. 30, compared with a loss of $7.38 million, or 29 cents a share, a year ago. Excluding one-time items, Virgin Mobile earned 8 cents a share, well above analysts' expectations of 4 cents a share, according to Thomson Reuters.