TORONTO, Jan. 22 (Xinhua) -- Canada's main stock index edged down Monday as railroad and materials shares dropped.

The Toronto Stock Exchange's benchmark Standard & Poor's/TSX Composite Index declined 5.48 points, or 0.03 percent, to close the day 16,347.98. Four of the index's 10 main groups were down.

The Canadian dollar gained 0.22 cents at 0.80.31 U.S.dollar.

The industrials group fell 0.6 percent, with Canadian National Railway Co down 1.6 percent to 99.39 Canadian dollars while Canadian Pacific Railway Ltd (CP.TO) was declined 0.8 percent to 231.66 Canadian dollars.

The materials group, which includes precious and base metals miners and fertilizer companies, lost 0.6 percent, Teck Resources Ltd down 1.4 percent to 36.27 Canadian dollars and Franco-Nevada Corp down 3.4 percent to 94.51 Canadian dollars.

The largest percentage gainer was Home Capital Group Inc, which surged 10.5 percent after TD Securities raised its target price on the stock to 21 Canadian dollars from 17 Canadian dollars.

The overall financial services group rose 0.1 percent. Toronto-Dominion Bank added 0.5 percent to 74.41 Canadian dollars. Enditem