Canadian stocks plunged the most in five months as earnings and dividend disappointments among gold companies, along with weakening oil prices and trepidation over President Donald Trump’s border tax proposals, erased two-thirds of this year’s rally. The S&P/TSX Composite Index fell 1.7 percent to 15,521.39 at 2:36 p.m. in New York. All 11 major industry groups were lower, led by energy shares, whose decline extended their 2017 loss past 7 percent. Car components maker Magna International slipped 5.4 percent after saying protectionism and U.S. measures that impede free trade may have a material adverse effect on its operations. Gold stocks were among the weakest on the S&P TSX, with Torex Gold Resources falling almost 10 percent after being downgraded to hold at Toronto Dominion. Eldorado Gold decreased 8.7 percent following an unexpected fourth-quarter loss. Nevsun Resources, which cut its dividend by 75 percent to 1 cent, slid 8.6 percent […]