https://www.theguardian.com/technology/2018/jul/26/facebook-stock-price-falling-what-does-it-mean-analysis

The company lost $118bn in market value after news of slowed growth and rising costs. But is it more than a blip?

Facebook’s stock price took a 20% tumble this week after the company’s latest quarterly earnings revealed stagnating user growth in key markets and rising costs associated with tackling misinformation, election interference and privacy issues.