Jonathan Vanian / CNBC:
Pinterest reports third-quarter revenue up 17% year-over-year to $1.05 billion, MAUs up 12% to 600 million, versus estimate of $590 million, but forecast fourth-quarter revenue below estimate; PINS drop over 13% after hours— Shares of Pinterest fell as much as 15% Tuesday after the company reported third-quarter financial results that missed earnings per share and delivered weak guidance.