Most actively traded companies on the TSX

Some of the most active companies traded Monday on the Toronto Stock Exchange:

Toronto Stock Exchange (13,390.19, up 32.08 points):

Acerus Pharmaceuticals Corp. (TSX:ASP). Drug manufacturer. Up eight cents, or 84.21 per cent, to 17.5 cents on 6.3 million shares.

Encana Corp. (TSX:ECA). Oil and gas. Down 21 cents, or 2.68 per cent, to $7.64 on 5.4 million shares.

First Quantum Minerals Ltd. (TSX:FM). Miner. Down 20 cents, or 2.86 per cent, to $6.79 on five million shares.

Bombardier Inc. (TSX:BBD.B). Aerospace, rail equipment. Up one cent, or 0.75 per cent, to $1.34 on 4.4 million shares.

Teck Resources Ltd. (TSX:TCK.B). Miner. Up one cent, or 0.10 per cent, to $9.76 on 4.3 million shares.

GeneNews Ltd. (TSX:GEN). Health-care. Up 3.5 cents, or 35 per cent, to 13.5 cents on four million shares.

Companies reporting major news:

Valeant Pharmaceuticals International Inc. (TSX:VRX). Pharmaceutical. Down $3.14, or 7.62 per cent, to $38.07 on 986,822 shares. Shares of the beleaguered Canadian drugmaker plunged again Monday after its CEO was subpoenaed by a congressional committee. The Senate aging committee said in a statement thatMichael Pearson, Valeant’s CEO since September 2010, is among witnesses expected to testify April 27 on big price hikes by the drug companies.