But because group chats and the channel features are not end-to-end encrypted, Galperin said user privacy is potentially under threat. False news often spreads via public groups, or chats, with potentially fatal effects. In the past, it was noticed that through bulk SMSes, investors were induced to invest in or purchase the stocks of certain listed companies. Anastasia Vlasova/Getty Images 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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