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Facebook shares continued to slide amid the ongoing controversy on the use of data collected by the social network. It follows allegations that 50 million Facebook users' private information was misused by a political consultancy firm. Cambridge Analytica and Facebook deny any wrongdoing. ´óÏó´«Ã½'s media editor Amol Rajan has been looking into the impact it's had on the social media giant's reputation.

(Photo: A Facebook logo is seen through the windows of the NASDAQ stock exchange as people walk by on Times Square in New York, 2012, Credit: Emmanuel Dunand/Getty Images)