Amazon.com shares fell about 4% in postmarket trading after the e-commerce and cloud company released quarterly earnings. Here are some of the key figures: Earnings per share came in at $1.86, ahead of analyst expectations of $1.

Looking ahead, Amazon forecast first-quarter revenue of between $151 billion and $155.5 billion, below the analyst consensus of $158.58 billion. Amazon said the forecast reflects "an unusually large, unfavorable impact" from foreign exchange rates, to the tune of $2.1 billion.