TORONTO, March 20 (Reuters) - Canada's main stock index slipped in early trade on Monday as bank shares fell and energy companies were weighed down by lower oil prices, offsetting gains for materials stocks including acquisition target Dominion Diamond Corp DDC.TO .
The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 1.46 points, or 0.01 percent, at 15,489.03 shortly after the open. Six of its 10 main groups gained.