* The Toronto Stock Exchange's TSX rises 0.55 percent to 19,213.16
* Leading the index were Nexgen Energy Ltd NXE.TO , up 13.8%, Silvercorp Metals Inc SVM.TO , up 12.1%, and Endeavour Silver Corp EDR.TO , higher by 10.5%.
* Lagging shares were Ballard Power Systems Inc BLDP.TO , down 7.4%, Aphria Inc APHA.TO , down 7.1%, and Aurinia Pharmaceuticals Inc AUP.TO , lower by 5.6%.
* On the TSX 171 issues rose and 56 fell as a 3.1-to-1 ratio favored advancers. There were 34 new highs and no new lows, with total volume of 185.8 million shares.
* The most heavily traded shares by volume were Manulife Financial Corp MFC.TO , Enbridge Inc ENB.TO and Bank Of Montreal BMO.TO .
* The TSX's energy group .SPTTEN rose 3.72 points, or 3.2%, while the financials sector .SPTTFS climbed 1.08 points, or 0.3%.
* West Texas Intermediate crude futures CLc1 rose 1.45%, or $0.92, to $64.5 a barrel. Brent crude LCOc1 rose 1.24%, or $0.83, to $67.59 O/R
* The TSX is up 10.2% for the year. This summary was machine generated May 3 at 21:03 GMT.