https://phys.org/news/2018-10-google-amazon-setbacks-sales-outlook.html

While both on Thursday reported bumper profits in the past quarter, revenues came up short of expectations at Google and Amazon spooked the markets with a so-so forecast for the all-important holiday season coming up.

"Given the current market backdrop, your earnings report has to be perfect or your stock will get punished," said Vic Anthony, an analyst at Aegis Capital Corp.