Stocks dive as gloves come off in trade row

Wall Street dived at the opening bell, with European and Asian markets also a sea of red.Investors around the globe are rattled by China's plans to hit major US exports such as soybeans, cars and small aircraft with retaliatory tariffs worth $50 billion in the escalating trade duel.China's threats came as a response to a US list of Chinese imports that could be targeted by tariffs, also worth $50 billion.