* The Toronto Stock Exchange's TSX falls 0.73 percent to 16,099.52
* Leading the index were Artis Real Estate Investment Trust AX_u.TO , up 4.1%, Ballard Power Systems Inc BLDP.TO , up 3%, and Hydro One Ltd H.TO , higher by 2.9%.
* Lagging shares were MEG Energy Corp MEG.TO , down 11.9%, Vermilion Energy Inc VET.TO , down 11.0%, and Aurora Cannabis Inc ACB.TO , lower by 10.8%.
* On the TSX 71 issues rose and 143 fell as a 0.5-to-1 ratio favored decliners. There were no and 1 new low, with total volume of 282.4 million shares.
* The most heavily traded shares by volume were Suncor Energy Inc SU.TO , Canadian Natural Resources Ltd CNQ.TO and Manulife Financial Corp MFC.TO .
* The TSX's energy group .SPTTEN fell 5.89 points, or 7.6%, while the financials sector .SPTTFS slipped 1.84 points, or 0.7%.
* West Texas Intermediate crude futures CLc1 fell 7.37%, or $2.93, to $36.84 a barrel. Brent crude LCOc1 fell 5.09%, or $2.14, to $39.87 O/R
* The TSX is off 5.6% for the year.