Facebook (NASDAQ: FB) stock fell as much as 8.1% on Monday after the company's weekend revelation that Strategic Communications Laboratories (SCL) and data analytics firm Cambridge Analytica had been suspended pending an investigation in whether they violated commitments about user data. The stock is down 7.7% at about 12:20 p.m. EDT.
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In 2015, Facebook learned that an app by psychology professor Aleksandr Kogan at the University of Cambridge that collected data with users' permission violated its platform policies by passing the data on to SCL and Cambridge Analytica. Though the app has been removed and Kogan and other parties with access to the data had attested to destroying it, Facebook has learned that not all of it may have been deleted.
After news about this violation of Facebook's policies spread, many media organizations began referring to this incident as a data breach. Facebook, however, called it "completely false" in an update released on Saturday.
But even if this doesn't technically qualify as a data breach, it still raises concerns about Facebook's use of personal data.
The fact that a developer was able to misuse Facebook user data is bringing its management of personal data into the spotlight. Though the social network reassured investors Friday that it has made "significant improvements" in how it attempts to detect and prevent violations since this incident and that it is "constantly working to improve the safety and experience" for its users, questions remain.
Sen. John Kennedy (R-LA) and Sen. Amy Klobuchar (D-MN) are calling for Facebook CEO Mark Zuckerberg to testify before Congress about the company's use of personal data.
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