Telegram was founded in 2013 by two Russian brothers, Nikolai and Pavel Durov. WhatsApp, a rival messaging platform, introduced some measures to counter disinformation when Covid-19 was first sweeping the world. Despite Telegram's origins, its approach to users' security has privacy advocates worried. Perpetrators of such fraud use various marketing techniques to attract subscribers on their social media channels. Friday’s performance was part of a larger shift. For the week, the Dow, S&P 500 and Nasdaq fell 2%, 2.9%, and 3.5%, respectively.
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