By Commodity News Service Canada WINNIPEG, Dec. 27 (CNS Canada) – The Canadian dollar was down at market close Thursday despite the Toronto Stock Exchange ended trading up by 2.79 per cent. The dollar closed at US$0.7331 or US$1=C$1.3641, which compares with Monday’s close of US$0.7359 or C$1.3589. In trading after the Christmas and Boxing