* The Toronto Stock Exchange's TSX falls 0.77 percent to 18,836.47
* Leading the index were TFI International Inc TFII.TO , up 3.0%, Waste Connections Inc WCN.TO , up 2.6%, and Colliers International Group Inc CIGI.TO , higher by 2.2%.
* Lagging shares were Vermilion Energy Inc VET.TO , down 9.1%, Enerplus Corp ERF.TO , down 8.5%, and Crescent Point Energy Corp CPG.TO , lower by 8.4%.
* On the TSX 51 issues rose and 168 fell as a 0.3-to-1 ratio favored decliners. There were 17 new highs and no new lows, with total volume of 266.5 million shares.
* The most heavily traded shares by volume were Canadian Natural Resources Ltd CNQ.TO , Toronto-dominion Bank TD.TO and Cenovus Energy Inc CVE.TO .
* The TSX's energy group .SPTTEN fell 6.43 points, or 5.2%, while the financials sector .SPTTFS climbed 2.11 points, or 0.6%.
* West Texas Intermediate crude futures CLc1 fell 7.85%, or $5.07, to $59.53 a barrel. Brent crude LCOc1 fell 7.75%, or $5.27, to $62.73 O/R
* The TSX is up 8% for the year.