Some of the most active companies traded Tuesday on the Toronto Stock Exchange:Toronto Stock Exchange (15,216.47, down 25.41 points)Aurora Cannabis Inc. (TSX:ACB). Health care. Down 16 cents, or 1.41 per cent, to $11.15 on 7.3 million shares.Eldorado Gold Corp. (TSX:ELD). Miner. Down eight cents, or 5.44 per cent, to $1.39 on 6.6 million shares.First Quantum Minerals Ltd. (TSX:FM). Miner. Up $1.45, or 7.73 per cent, to $20.22 on 6.5 million shares.Cenovus Energy Inc. (TSX:CVE). Oil and gas. Down 23 cents, or 2.37 per cent, to $9.49 on 5.8 million shares.Manulife Financial Corp. (TSX:MFC). Financial Services. Down 13 cents, or 0.52 per cent, to $24.70 on 4.7 million shares.Bombardier Inc. (TSX:BBD.B). Aerospace, rail equipment. Down three cents, or 0.93 per cent, to $3.19 on 4.6 million shares.