Amazon.com's

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

quarterly

report and improved outlook energized traders after the bell Tuesday, as the online bookseller's shares rose sharply in extended action.

Amazon was up 6.7% to $15 on the Instinet platform, where it was the volume leader. Overall, volume was moderate. In the first hour of extra trading, around 3.5 million shares changed hands among the top-20 volume movers.

Expedia

(EXPE) - Get Expedia Group, Inc. Report

was adding 2.8% to $72.75 after the online travel company

turned a quarterly profit and raised its guidance.

Check Point Software

(CHKP) - Get Check Point Software Technologies Ltd. Report

was gaining 3.6% to $18.85

following a mixed quarter.

Among other active issues,

Cisco

(CSCO) - Get Cisco Systems, Inc. Report

was up 1% to $14.15, and

Idec Pharmaceuticals

(IDPH)

, which announced a $675 million debt offering, fell 3.2% to $59.20.

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WorldCom

(WCOM)

was off 1.5%, and the

Nasdaq 100 Unit Trust

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slipped 0.2%.

Microsoft

(MSFT) - Get Microsoft Corporation (MSFT) Report

shed 0.4%, and

Intel

(INTC) - Get Intel Corporation (INTC) Report

inched down 0.6%.

Sun

(SUNW) - Get Sunworks, Inc. Report

was climbing 0.6%.

Precise Software

(PRSE)

was diving 15.5% to $16.06, even though the company met analysts' expectations for the latest quarter. Biopharmaceutical company

Corvas

(CVAS)

tanked 38% to $3.69. The company reported a narrower-than-expected loss in the latest quarter, but also disclosed disappointing results from a trial for a stroke treatment.