The JSE all share opened sharply weaker on Friday as Naspers tumbled nearly 4% on the Chinese government’s announced investigation into alleged "cyber-security violations" among Chinese internet companies.Resources on the JSE were lower, but gold shares gained on continued concern about geopolitical tension, with President Donald Trump saying that "North Korea should be very nervous" following Pyongyang’s threat to direct missiles at the US base at Guam.The Chinese investigation is targeted towards Tencent, of which Naspers owns a third, as well as other large Chinese internet companies, including Baidu and Sina Weibo. An English translation of a notice on the office for cyberspace administration website said the social media platforms of the three companies — WeChat, Tieba and Weibo respectively — have users spreading "violence and terror, false rumours, obscene pornography and other content that endangers national security, public safety and social order," CNBC reported.Naspers ha...

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