SAN FRANCISCO -- The stock market is on the defensive today, although the tech sector is only marginally lower.

The Internet sector has been mixed in trading thus far today, with

(AMZN) - Get Report

among the most active issues on the


. There are rumors circulating that the company will enter the online-auction business, though one analyst contacted by


said he would be surprised if the company added such a service. Company officials could not be reached for comment. Shares of Amazon were lately up 4 3/4, or 3%, to 144 5/8.

The Internet IPO of the day is

(ABTL:Nasdaq), which was priced Thursday at 23, a level much higher than anticipated., which has yet to begin trading, follows


, which went public on Tuesday. Autoweb was priced initially at 14, but it traded as high as 50 on Wednesday. Shares of Autoweb were lately trading up 2 5/16, or 7%, to 35 11/16. Both companies help connect car buyers with sellers through the Internet.

The biggest point gainer on the Nasdaq early on has been


(QCOM) - Get Report

, which has climbed 16 9/16, or 17%, to 115 so far today. The stock was up 13% on Thursday after the company resolved a dispute with



over access technology.

Also among the leading point gainers on the Nasdaq is

Winfield Capital


, a small-business investment company that


wrote about on Thursday. Winfield was recently up 3 13/16, or 17%, to 22 3/8.

Shares of

Lexmark International


are on the rise after

Morgan Stanley

upgraded the stock to strong buy from outperform. Lexmark, which develops laser and inkjet printers, was trading up 5 3/8, or 6%, to 100.