Amazon.com

(AMZN) - Get Amazon.com, Inc. Report

was among the biggest volume movers in Instinet trading after the close Friday, but the online books and music seller was little changed from the end of regular trading.

The company's shares were ticking down 0.2% to $12.22. Earlier in the day,

TheStreet.com

published a story indicating that some

analysts are being cautious when assessing Amazon's holiday sales.

Kmart

(KM)

, which has been drawing critical comments from Wall Street analysts this week, was the most active issue, trading up 0.2% to $4.72. Edward Jones, Morgan Stanley, Prudential and UBS Warburg cut their estimates, price targets or ratings on the retailer's stock during the past few days, saying that the company is having a tough time keeping up with its competitors. One analyst suggested a bankruptcy filing may be in Kmart's future.

Overall, volume was typical for the last session of the week. In the first half-hour of extra trading on the Instinet platform, around 1.9 million shares changed hands among the top-20 volume movers.

Cisco

(CSCO) - Get Cisco Systems, Inc. Report

was off 0.3% to $20.77 after the close.

Sun Micro

(SUNW) - Get Sunworks, Inc. Report

was unchanged at $13.93, and

WorldCom

(SUNW) - Get Sunworks, Inc. Report

was inching up 0.1% to $14.62.

JDS Uniphase

TheStreet Recommends

(JDSU)

was dropping 1.2% to $9.90, while

Dell

(DELL) - Get Dell Technologies Inc Class C Report

was lower by 0.2% to $29.53.

FreeMarkets

(FMKT)

was off 0.7% to $26.72, and

Intel

(INTC) - Get Intel Corporation (INTC) Report

was down 0.1% to $35.74.

The

Nasdaq 100 Tracking Stock

(QQQ) - Get Invesco QQQ Trust Report

was flat at $41.65.

Cephalon

(CEPH)

was gaining 1.7% to $77.54, but volume was fairly light.

CV Therapeutics

(CVTX)

was one of the biggest losers in after-hours trading, shedding 4.4% to $47.90.