North American markets drop on U.S.-China trade war

TORONTO -- North American stock markets plummeted Friday after the U.S.-Sino trade war heated up with U.S. President Donald Trump angrily responding to China's tariff retaliation. China kicked off a political firestorm by announcing tariff hikes on US$75 billion of U.S. products including some agricultural products, crude oil and small aircraft in retaliation to U.S. tariffs. China will also boost import duties on U.S.-made autos and auto parts. Trump reacted by ordering U.S. companies to "immed