This past week's big tech earnings reports saw most names sell off hard, with Amazon (NASDAQ: AMZN) logging a 6.8% decline on Friday after its Thursday night earnings, even as the broader market was up 2.5% on the day.

Sellers were probably worried about two things: relatively tepid fourth-quarter guidance, along with lower-than-expected revenue growth and margins in the Amazon Web Services (AWS) segment.

Those were not unfounded concerns, although quarter-to-quarter fluctuations are expected, especially as interest rates and natural gas prices spiked over the summer.

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Source Fool.com