The Globe and Mail reports in its Tuesday edition that the S&P 500 closed Monday's session slightly lower as investors held their breath before a crucial inflation reading that could provide clues as to how long the U.S. Federal Reserve will keep interest rates elevated. A Reuters dispatch to The Globe says that Canada's main stock index closed up 54.68 points to 19,709.15, thanks to a boost in energy stocks as oil prices ticked up. After the indexes enjoyed a rally Friday, the market turned its focus on Monday to U.S. Consumer Price Index (CPI) data, due out this morning. Economists expect a headline increase of 3.3 per cent for October, easing from 3.7 per cent in September. Core prices are expected to be unchanged from the previous month. Traders have priced in an 86-per-cent chance the Fed holds interest rates steady in December. Moody's on Friday lowered its outlook on the U.S. credit rating to "negative" from "stable," citing large fiscal deficits and a decline in debt affordability. This added to investor reluctance to make big decisions ahead of a weekend deadline that could potentially result in a U.S. government shutdown. U.S. crude futures gained $1.09 (U.S.) to close at $78.26 (U.S.) a barrel.