CANADA STOCKS - TSX rises 0.55 percent

* The Toronto Stock Exchange's S&P/TSX rose 84.52 points, or 0.55 percent, to 15,463.14. * Leading the index were SNC-Lavalin Group Inc, up 6.5 percent, Iamgold Corp, up 5.8 percent, and First Quantum Minerals Ltd , higher by 5.2 percent. * Lagging shares were Canopy Growth Corp, down 7 percent, Cascades Inc, down 4.3 percent, and Aurora Cannabis Inc, lower by 3.4 percent. * On the TSX 138 issues rose and 98 fell as a 1.4-to-1 ratio favored advancers. There were 8 ne