Pinterest (PINS) is tumbling in Thursday's extended-hours trading despite topping third quarter earnings estimates on the social media site's top and bottom lines, with revenue of $898.4 million and adjusted earnings of $0.40 per share. The stock appears to be dragged lower on its fourth quarter sales guidance.

Julie Hyman and Josh Lipton discuss Pinterest's quarterly performance and outlook.

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This post was written by Luke Carberry Mogan.