* The Toronto Stock Exchange's TSX falls 1.34 percent to 15,981.77
* Leading the index were Shopify Inc
* Lagging shares were First Majestic Silver Corp , down 9.3%, Hudbay Minerals Inc, down 9.0%, and First Quantum Minerals Ltd, lower by 8.8%.
* On the TSX 29 issues rose and 193 fell as a 0.2-to-1 ratio favored decliners. There was 1 new high and no new lows, with total volume of 270.5 million shares.
* The most heavily traded shares by volume were Canadian Natural Resources Ltd , Suncor Energy Inc and Kinross Gold Corp.
* The TSX's energy group fell 3.07 points, or 4.3%, while the financials sector slipped 3.99 points, or 1.5%.
* West Texas Intermediate crude futures fell 3.7%, or $1.52, to $39.59 a barrel. Brent crude fell 3.41%, or $1.47, to $41.68
* The TSX is off 6.3% for the year.