Pinterest (PINS) shares tumble further in Friday pre-market trading since reporting weak sales guidance for its fourth quarter. The social media platform topped its third quarter revenue and earnings estimates while announcing a $2 billion share buyback program.

Morning Brief hosts Seana Smith and Brad Smith report more on the stock's post-earnings response.

To watch more expert insights and analysis on the latest market action, check out more Morning Brief here.

This post was written by Luke Carberry Mogan.