Why did the Facebook stock drop?

Related questions

1. How much did Mark Zuckerberg lose today?
2. What makes stock prices go up?
3. Can a company ever run out of stock to sell?
4. What is the PE ratio for Facebook?
5. What day of the week should you buy stocks?
6. What is Zuckerberg's salary?
7. What is a good EPS for a stock?
8. What is Amazon's PE ratio?
9. Is Facebook privately owned?
10. Do Facebook shares pay dividends?

Tags

1. #profits
2. #categories
3. #investors
4. #latter
5. #exceed
6. #noted
7. #growth
8. #margins
9. #facing
10. #drawn
11. #profitability
12. #headwinds
13. #wehner
14. #pushing
15. #facebook
16. #expense
17. #because
18. #operating
19. #total
20. #revenue
21. #users