The regulator said it has been undertaking several campaigns to educate the investors to be vigilant while taking investment decisions based on stock tips. Despite Telegram's origins, its approach to users' security has privacy advocates worried. 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. Although some channels have been removed, the curation process is considered opaque and insufficient by analysts. Some privacy experts say Telegram is not secure enough
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