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.

Strategists warned the move, announced after the market close on Friday, could spark some near-term selling in stocks and Treasurys.