The Globe and Mail reports in its Tuesday edition that Canada's main stock index fell on Monday but the loonie notched a near-three-week high. A Reuters dispatch to The Globe says the moves came as investors weighed the uncertain timing of a shift in Canadian political power after Prime Minister Justin Trudeau announced plans to resign. The S&P/TSX Composite Index ended down 73.75 points at 24,999.79, after three straight days of gains. On Wall Street, both the S&P 500 and Nasdaq rose to more than one-week highs. Mr. Trudeau said he would step down in the coming months after nine years in power and added that Parliament would be prorogued, or suspended, until March 24. "The TSX isn't doing too much because you could say this puts us into limbo for the next few months," said Greg Taylor, portfolio manager at Purpose Investments. Proroguing Parliament during the first days of office of the Trump administration could potentially add to the risk that investors face, he said. Among the gainers was energy. It rose 1 per cent as the price of oil touched its highest level since mid-October before settling lower at $73.56 (U.S.) a barrel. Nasdaq was boosted by a rally in semiconductor stocks. The Dow fell 25.57 points.