* The Toronto Stock Exchange's TSX falls 1.21 percent to 16,185.32
* Leading the index were ATS Automation Tooling Systems Inc ATA.TO , up 5.6%, Empire Company Ltd EMPa.TO , up 4.3%, and Brookfield Business Partners LP BBU_u.TO , higher by 4%.
* Lagging shares were Enerplus Corp ERF.TO , down 8.5%, Vermilion Energy Inc VET.TO , down 7.2%, and Descartes Systems Group Inc DSG.TO , lower by 6.5%.
* On the TSX 41 issues rose and 178 fell as a 0.2-to-1 ratio favored decliners. There were 2 new highs and no new lows, with total volume of 215.7 million shares.
* The most heavily traded shares by volume were Suncor Energy Inc SU.TO , Canadian Natural Resources Ltd CNQ.TO and Enbridge Inc ENB.TO .
* The TSX's energy group .SPTTEN fell 1.60 points, or 2.2%, while the financials sector .SPTTFS slipped 3.14 points, or 1.1%.
* West Texas Intermediate crude futures CLc1 fell 2.76%, or $1.05, to $37 a barrel. Brent crude LCOc1 fell 2.5%, or $1.02, to $39.77 O/R
* The TSX is off 5.1% for the year.