TORONTO, Jan 4 (Reuters) - Canada's main stock index opened higher on Wednesday, a day after hitting a 20-month high, as industrial and materials stocks gained and Encana Corp ECA.TO jumped on an upward revision to its margin forecast.
The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was up 32.16 points, or 0.21 percent, at 15,435.19 shortly after the open. Six of its 10 main groups were higher.