TSX’s six-day rally ends despite railway gains

By Alastair Sharp TORONTO (Reuters) – Canada's main stock index slipped on Wednesday, ending a six-session rally, as strong results from the country's two big railways failed to offset heavy losses in banking, energy and mining stocks. "It's a bipolar market today. It's difficult for the index to get any traction when the three biggest groups are down," said Elvis Picardo, portfolio manager at Global Securities in Vancouver. The financial, energy and materials groups combined account for more than 70 percent of the Toronto Stock Exchange's S&P/TSX composite index , which ended down 4. …