Stock futures declined before the opening bell Monday after the U.S. credit rating was downgraded by Moody's Ratings on Friday. As of 8:30 a.m. EST, S&P 500 futures had shed 65 points, or 1.1%, while Dow Jones Industrial Average futures declined 252 points or 0.

By Shashwat Chauhan and Kanchana Chakravarty (Reuters) -Wall Street futures fell and Treasury yields rose on Monday after Moody's downgraded the U.S. sovereign rating, sharpening focus on the country's mounting debt.