False news often spreads via public groups, or chats, with potentially fatal effects. For example, WhatsApp restricted the number of times a user could forward something, and developed automated systems that detect and flag objectionable content. 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. The regulator said it has been undertaking several campaigns to educate the investors to be vigilant while taking investment decisions based on stock tips. Such instructions could actually endanger people — citizens receive air strike warnings via smartphone alerts.
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