Facebook stock is down 4% after an enormous data breach (FB)

Facebook's stock is tanking Monday in premarket trading.
News broke over the weekend that Cambridge Analytica, a controversial political research company with links to Donald Trump, had accessed 50 million Facebook user profiles illegitimately.
Facebook suspended Cambridge Analytica from its platform but is under huge political pressure to explain how it can stop third parties from abusing its massive data trove.

Facebook's share price has dropped 4.05% in premarket trading on Monday, most likely thanks to the news that the political-research firm Cambridge Analytica used its site to harvest 50 million user profiles illegitimately.

According to Markets Insider, Facebook's share price stands at $177.60 in premarket trading, down from $185.09 at the market close on Friday. The drop wipes about $21 million off Facebook's market cap.

Lawmakers in the US and the UK are examining Facebook and its role in election interference

Facebook is under huge pressure from lawmakers in the US and the UK over the way it handles user data and how that data can be manipulated for targeted political advertising.

The Guardian and The New York Times reported on Saturday that Cambridge Analytica had accessed data from 50 million Facebook users during the 2016 US presidential campaign without their permission. It used that information for highly targeted political ads on Facebook.

A former Cambridge Analytica employee, Christopher Wylie, blew the whistle, saying: "We exploited Facebook to harvest millions of people's profiles. And built models to exploit what we knew about them and target their inner demons. That was the basis that the entire company was built on."

Cambridge Analytica managed to access the data after teaming up with a University of Cambridge psychology professor, Aleksandr Kogan, and his company Global Science Research in 2014. GSR had developed an app, Thisisyourdigitallife, which examined what people "liked" on Facebook. Cambridge Analytica and GSR paid about 270,000 people to download the app and take a personality test — but the app also siphoned off data about the users' friends.

Facebook eventually became aware of the app, and it asked GSR and Cambridge Analytica to delete all the data they held on users. But The New York Times found Cambridge Analytica still held most of the data. Facebook suspended the company from its platform on Friday, prior to the full revelations becoming public but after it had been notified that a story was being published.

Sen. Marco Rubio of Florida said Facebook acted as though it were above the law.

And Damian Collins, the British politician overseeing a select committee investigation into fake news, said on Sunday that Cambridge Analytica had misled members of Parliament over its use of Facebook data.

He also said Facebook executives had tried to avoid tough questions over their company's role in spreading fake news and in election interference.

"Alexander Nix denied to the Committee last month that his company had received any data from the Global Science Research company (GSR)," he said. "From the evidence that has been published by The Guardian and The Observer this weekend, it seems clear that he has deliberately mislead the Committee and Parliament by giving false statements."

He added: "I will be writing to Mark Zuckerberg asking that either he, or another senior executive from the company, appear to give evidence in front of the Committee as part our inquiry. It is not acceptable that they have previously sent witnesses who seek to avoid asking difficult questions by claiming not to know the answers. This also creates a false reassurance that Facebook's stated policies are always robust and effectively policed."

Facebook stock is down 4% after an enormous data breach (FB)

Lawmakers in the US and the UK are examining Facebook and its role in election interference

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