Stocks dropped on Friday afternoon, as gains made earlier in the day on hopes for diplomatic progress between Russia and Ukraine turned to losses. Technology stocks were hit particularly hard by higher bond yields. WhatsApp, a rival messaging platform, introduced some measures to counter disinformation when Covid-19 was first sweeping the world. "Your messages about the movement of the enemy through the official chatbot … bring new trophies every day," the government agency tweeted. Anastasia Vlasova/Getty Images Perpetrators of such fraud use various marketing techniques to attract subscribers on their social media channels.
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