(Reuters) -Canada's main stock index fell on Monday to a seven-month low, including declines for energy and financial shares, as a widening trade war threatened to derail the global economy and despite the prospect of negotiations that could lead to deals. Toronto Stock Exchange's S&P/TSX composite index ended down 334.01 points, or 1.4%, at 22,859.46, adding to steep declines on Thursday and Friday and posting its lowest closing level since September 6. U.S. President Donald Trump said he was not looking at a pause on tariffs to allow for negotiations with trading partners but said he would talk to China, Japan and other countries about the duties.