Facebook Inc. FB 1.32% warned that its growth is slowing, sending its stock price plummeting as investors feared the social-media titanâs fortunes arenât immune to the multiple controversies it has faced this year.
After touching record highs earlier on Wednesday, Facebook shares dropped as much as 23% in after-hours trading, a plunge that would wipe roughly $130 billion from the companyâs value if it holds when the markets open on Thursday. That would be more than the entire market value of McDonaldâs Corp. MCD 0.60% , although after-hours declines donât always correspond to market prices the next day.
Facebook has shown few business effects from the negative headlines that have dogged it in recent months. But winding up a quarter during which its privacy practices stirred fresh controversy, the company late Wednesday reported slower-than-expected revenue growth for the periodâalbeit logging in at more than 40%âand said it expected quarterly revenue growth to decline over the rest of the year.
The Menlo Park, Calif., firm also showed sluggish user trends in some of its most lucrative markets, including the U.S. and Canada, in the second quarter.
Daily active users in the U.S. and Canada measured at 185 million, flat with the first quarter and up slightly from a year earlier. Facebookâs daily user base in Europe edged down to 279 million accounts, from 282 million in the prior quarter. Facebook executives said that decline stemmed from a tough new European privacy law that went into effect in the second quarter.
Some worried that the results suggest growth could be threatened not just for Facebook but also for other tech companies that depend on consumers spending ever-more time on their digital devices. âI canât help but wonder if this is an early warning sign that the marketâs assumptions about tech companiesâ growth failed to account for the fact that each of us only has 24 hours in a day,â said Jim Anderson, CEO of SocialFlow, a platform for publishers to post stories on Facebook and other social-media sites.
Prior to Wednesdayâs report, most analysts expected Facebook to continue its streak of impressive growth that seemed impervious to controversies about the platformâs operations.
For the second quarter, Facebook reported earnings per share of $1.74, up from $1.32 a year earlier. Revenue increased 42% to $13.23 billion. Analysts, on average, expected earnings of $1.72 a share on revenue of $13.36 billion, according to Thomson Reuters.
The last time Facebook missed analyst estimates for revenue was in the first quarter of 2015.
In a call with analysts, Facebook Chief Executive Officer Mark Zuckerberg called the results âanother solid quarterââbut those comments were quickly overshadowed when other executives warned that tougher privacy laws, a shift toward less lucrative advertising products and currency headwinds would clip revenue growth.
They noted that the revenue growth rate fell seven percentage points in the second quarter compared with the first three months of the year and said the company expected quarter-to-quarter revenue growth rates to decrease by âhigh single-digit percentagesâ in the second half of 2018.
The company also said its expenses would rise faster than revenue in 2019 and projected that its operating-margin percentages would be in the mid-30s over the next several years, due to higher spending on product and infrastructure. The second-quarter margin was 44%.
The results âshowed growth but geographically have pockets of softness,â said Daniel Ives, head of technology research at GBH Insights.
Facebookâs global reach and impact on the world have been under scrutiny since the 2016 U.S. presidential election, when the social network attracted criticism for allowing fabricated news articles to flourish on the site.
Those issues intensified in March, when it suspended political analytics firm Cambridge Analytica for improperly accessing data from as many as 87 million Facebook users. That disclosure forced Mr. Zuckerberg to testify in front of lawmakers on both sides of the Atlantic in early April.
On the call Wednesday, Mr. Zuckerberg acknowledged that Facebook needed to invest more in security measures to prevent the platform from being manipulated. He also pledged that the company wouldnât stop building new products âbecause that wouldnât be the right way to serve our community and because we run this company for the long term, not for the next quarter.â
Despite those controversies, advertisers broadly speaking have remained on the site, largely because there are few other outlets that can match its reach and ability to target narrow slices of consumers.
âItâs going to take a lot more than the scandals they have had to change to the way that advertisers are using their dollars,â said Aaron Goldman, chief marketing officer of marketing technology firm 4C Insights.
The support of advertisers was a key reason for continued investor enthusiasm for the stock. Before the after-hours plunge, Facebookâs share price was up 26% since the Cambridge Analytica revelations in March.
Write to Deepa Seetharaman at Deepa.Seetharaman@wsj.com
Appeared in the July 26, 2018, print edition as ‘Facebook Sinks After Growth Warning.'