Fb shares opened sharply lower on Thursday, after the social media network warned traders of slowing revenue profits and increased spending.
The firm’s shares opened 20% down, a drop that wiped more than $100bn (£76bn) off Facebook’s market value.
The fall also dragged down the tech-rich Nasdaq share index, which used to be virtually 1% lower.
Fb’s forecast got here as the company faces a backlash over its handling of fake information and user data.
The corporate mentioned it anticipated to boost spending by way of 50% or extra, as it tries to improve the best way it displays content, tracks advertisers and treats user data – areas where it has confronted regulator scrutiny.
Symbol copyright Reuters Image caption Fb boss Mark Zuckerberg has seemed sooner than regulators this 12 months
Alphabet, which owns Google and YouTube, and likewise depends on virtual promoting, used to be down less than 1%, whilst song streaming provider Spotify gained almost 1%, after reporting stronger than expected user enlargement.
Many of the criteria affecting Facebook are distinctive to the corporate, said Daniel Ives, chief era officer at GBH Insights.
The company has been in the spotlight for its involvement with knowledge firm Cambridge Analytica.
Fb has additionally modified the inside track feed to emphasize posts from family and friends, tweaks that chief executive Mark Zuckerberg had up to now counseled could have an effect on profitability.
Analyst Richard Greenfield of BTIG Research wrote in a observe that buyers were “overreacting”.
He said Fb remained a wealthy chance for advertisers, and the investments it is making must drive long run enlargement.
“We had been pretty stressed out right through Fb’s Q2 2018 conference name and will feel the fear/panic in buyers voices afterwards,” he wrote.
However, he delivered: “Cell is consuming the sector and Fb is a center maintaining to profit from that shift.”