The Globe and Mail reports in its Wednesday edition that North American stock indexes ended sharply lower on Tuesday as 10-year Treasury yields held their multiyear highs, with investors still wrestling with prospects for a long period of high interest rates and the economic fallout. A Reuters dispatch to The Globe says that the Dow posted its biggest one-day percentage drop since March, while all three major U.S. averages as well as the Canadian benchmark stock index ended at their lowest closing levels in more than three months. Adding to investor anxiety was the potential of a partial U.S. government shutdown by the weekend, which ratings agency Moody's warned would harm the country's credit. Benchmark 10-year Treasury yields in both the U.S. and Canada have climbed to 16-year highs in the wake of the Federal Reserve's hawkish longer-term rate outlook last week. "We continue to adjust to the higher interest rates," said Brad McMillan at Commonwealth Financial. "There's a real sense out there that this isn't sustainable, and buyers are being scared away." The S&P/TSX Composite Index ended down 244.46 points at 19,556.15. Westshore Terminals ended 10 per cent lower as RBC cut its price target on the stock.