https://phys.org/news/2018-07-facebook-user-growth-cools.html

But shares slumped seven percent in after-hours exchanges after hitting record levels in official trading, with the quarterly report largely weaker than had been expected.

"Our community and business continue to grow quickly. We are committed to investing to keep people safe and secure, and to keep building meaningful new ways to help people connect," chief executive Mark Zuckerberg said.