TORONTO, Oct 17 (Reuters) - Canada's main stock index seesawed on Monday, led by gains for the materials group and for Rogers Communications Inc RCIb.TO after it named a new chief executive officer, while lower oil prices weighed on the shares of energy and railroad companies.
The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was up 1.81 points, or 0.01 percent, at 14,586.80, shortly after the open. Just four of the index's 10 main groups were higher.