CANADA STOCKS-Toronto stocks reverse earlier gains to fall to eight-week low

By Nichola Saminather Jan 31 (Reuters) - Canada's benchmark stock index surrendered earlier gains to fall to an eight-week low on Wednesday, with energy companies among the biggest decliners. * The Toronto Stock Exchange's S&P/TSX composite index was down 27 points, or 0.2 percent, at 15,928.52, putting it on track for an eight-week low in a third consecutive day of losses. * The index earlier rose as much as 0.15 percent, recovering from the previous session's dro