The Globe and Mail reports in its Tuesday edition that Canada's main stock index fell to a five-week low on Monday as long-term borrowing costs climbed and investors worried that this week's federal budget would propose raising taxes. A Reuters dispatch to The Globe says the S&P/TSX Composite Index ended down 159.79 points at 21,740.20, its lowest closing level since March 8. Economists say that Finance Minister Chrystia Freeland will have to find ways to amp up savings or raise taxes when she delivers the budget on Tuesday, as new heavy spending plans in the run-up further risks weakening government finances. U.S. stocks closed sharply lower on Monday as well, as an early lift from a strong retail sales report gave way to a jump in Treasury yields and concerns about rising geopolitical tensions between Iran and Israel. Canada's Consumer Price Index report for March will also arrive today. It is expected to show inflation rising to an annual rate of 2.9 per cent from 2.8 per cent in February. The Toronto market's energy sector fell 1.7 per cent as the price of oil settled lower at $85.41 (U.S.) a barrel. Early gains in U.S. markets faded over concerns the hostilities between Israel and Iran could continue to flare.