Shares in Amazon sank on Friday after missing Wall Street expectations for the seventh time in nine quarters—and it turns out the stock tanking isn’t so unusual either.
Read More A grocer in e-commerce clothes?
Amazon shares have fallen the day after earnings 11 of the last 20 quarters, according to Factset data, with an average day-after decline of 7.2 percent.
The stock hit its lowest levels since August 2013 in early trading Friday.