* The Toronto Stock Exchange's TSX falls 2.71 percent to 15,586.57
* Leading the index were FirstService Corp
* Lagging shares were Silvercorp Metals Inc , down 11.1%, Fortuna Silver Mines Inc, down 10.6%, and Kinross Gold Corp, lower by 9.5%.
* On the TSX 7 issues rose and 216 fell as a 0-to-1 ratio favored decliners. There were no and 2 new lows, with total volume of 277.5 million shares.
* The most heavily traded shares by volume were Husky Energy Inc , Cenovus Energy Inc and Barrick Gold Corp.
* The TSX's energy group fell 2.59 points, or 3.9%, while the financials sector slipped 6.18 points, or 2.3%.
* West Texas Intermediate crude futures fell 5.53%, or $2.19, to $37.38 a barrel. Brent crude fell 5.19%, or $2.14, to $39.06.
* The TSX is off 8.7% for the year.