* The Toronto Stock Exchange's TSX falls 1.27 percent to 16,447.66
* Leading the index were Semafo Inc SMF.TO , up 4.0 percent, Yamana Gold Inc YRI.TO , up 2.9 percent, and Detour Gold Corp DGC.TO , higher by 2.8 percent.
* Lagging shares were Bombardier Inc BBDb.TO , down 10.6 percent, Bausch Health Companies Inc BHC.TO , down 10.0 percent, and Hudbay Minerals Inc HBM.TO , lower by 8.8 percent.
* On the TSX 46 issues rose and 185 fell as a 0.2-to-1 ratio favored decliners. There were 11 new highs and 9 new lows, with total volume of 224.8 million shares.
* The most heavily traded shares by volume were Aurora Cannabis Inc ACB.TO , Bombardier Inc BBDb.TO and Encana Corp ECA.TO .
* The TSX's energy group .SPTTEN fell 4.42 points, or 3.2 percent, while the financials sector .SPTTFS slipped 4.23 points, or 1.3 percent.
* West Texas Intermediate crude futures CLc1 fell 0.87 percent, or $0.47, to $53.6 a barrel. Brent crude LCOc1 fell 0.52 percent, or $0.31, to $58.94 O/R
* The TSX is up 14.8 percent for the year.