U.S. stocks, bonds and dollar fall

NEW YORK — U.S. stocks, U.S. bonds and the value of the U.S. dollar are all falling on Monday following the latest reminder that the U.S government seems to be hurtling toward an unsustainable mountain of debt. The S&P 500 was 0.9% lower in early trading after Moody's Ratings became the last of the three major credit-rating agencies to say the U.S. federal government no longer deserves a top-tier "Aaa" rating. The Dow Jones Industrial Average was down 222 points, or 0.5%, as of 9:35 a.m. Eastern time, and the Nasdaq composite was 1.3% lower. Moody's pointed to how the…