Canadian energy stocks could benefit today from fears about potential damage to a key Mexican oil field by Hurricane Felix and expectations that OPEC plans to keep export curbs in place, but otherwise Canadian and U.S. stocks appear poised to open flat or down Tuesday, following the Labour Day long weekend. About 90 minutes before the opening bells in New York and Toronto, U.S. stock index futures were down slightly, while most European indexes were also in the red. Dow Jones industrial average futures were down 14 points to 13,350, S&P 500 futures were off 3.1 points to 1,473.6 while the Nasdaq 100 contract was down 2.5 points to 1,992.5. U.S. investors are awaiting the Institute for Supply Management's manufacturing index for August, which is due out at 10 a.m. EDT, and, they aren't expecting good news. Economists are betting the index will slip to 53 last month from 53.8 in July. "We're looking at a lower opening. We're really going to be scrutinizing the economic numbers," said Peter Cardillo, chief market economist at Avalon Partners in New York, told Reuters. "If we saw real weakness in the ISM or car sales, that would stir up the debate over how big a Fed interest rate cut we get." There are no major statistical releases set for Canada today, but the Bank of Canada is set to announce its next decision on interest rates Wednesday. Given the recent turmoil in financial markets, there will be brain glitches aplenty on Bay Street if the central bank does anything except leave its benchmark overnight rate unchanged at 4.5 per cent.